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(c) Microsoft Corporation.\r\n\r\nPermission to use, copy, modify, and/or distribute this software for any\r\npurpose with or without fee is hereby granted.\r\n\r\nTHE SOFTWARE IS PROVIDED \"AS IS\" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH\r\nREGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY\r\nAND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,\r\nINDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM\r\nLOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR\r\nOTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR\r\nPERFORMANCE OF THIS SOFTWARE.\r\n***************************************************************************** */\r\n/* global Reflect, Promise, SuppressedError, Symbol, Iterator */\r\n\r\nvar extendStatics = function(d, b) {\r\n extendStatics = Object.setPrototypeOf ||\r\n ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||\r\n function (d, b) { for (var p in b) if (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p]; };\r\n return extendStatics(d, b);\r\n};\r\n\r\nexport function __extends(d, b) {\r\n if (typeof b !== \"function\" && b !== null)\r\n throw new TypeError(\"Class extends value \" + String(b) + \" is not a constructor or null\");\r\n extendStatics(d, b);\r\n function __() { this.constructor = d; }\r\n d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());\r\n}\r\n\r\nexport var __assign = function() {\r\n __assign = Object.assign || function __assign(t) {\r\n for (var s, i = 1, n = arguments.length; i < n; i++) {\r\n s = arguments[i];\r\n for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p)) t[p] = s[p];\r\n }\r\n return t;\r\n }\r\n return __assign.apply(this, arguments);\r\n}\r\n\r\nexport function __rest(s, e) {\r\n var t = {};\r\n for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p) && e.indexOf(p) < 0)\r\n t[p] = s[p];\r\n if (s != null && typeof Object.getOwnPropertySymbols === \"function\")\r\n for (var i = 0, p = Object.getOwnPropertySymbols(s); i < p.length; i++) {\r\n if (e.indexOf(p[i]) < 0 && Object.prototype.propertyIsEnumerable.call(s, p[i]))\r\n t[p[i]] = s[p[i]];\r\n }\r\n return t;\r\n}\r\n\r\nexport function __decorate(decorators, target, key, desc) {\r\n var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;\r\n if (typeof Reflect === \"object\" && typeof Reflect.decorate === \"function\") r = Reflect.decorate(decorators, target, key, desc);\r\n else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;\r\n return c > 3 && r && Object.defineProperty(target, key, r), r;\r\n}\r\n\r\nexport function __param(paramIndex, decorator) {\r\n return function (target, key) { decorator(target, key, paramIndex); }\r\n}\r\n\r\nexport function __esDecorate(ctor, descriptorIn, decorators, contextIn, initializers, extraInitializers) {\r\n function accept(f) { if (f !== void 0 && typeof f !== \"function\") throw new TypeError(\"Function expected\"); return f; }\r\n var kind = contextIn.kind, key = kind === \"getter\" ? \"get\" : kind === \"setter\" ? \"set\" : \"value\";\r\n var target = !descriptorIn && ctor ? contextIn[\"static\"] ? ctor : ctor.prototype : null;\r\n var descriptor = descriptorIn || (target ? Object.getOwnPropertyDescriptor(target, contextIn.name) : {});\r\n var _, done = false;\r\n for (var i = decorators.length - 1; i >= 0; i--) {\r\n var context = {};\r\n for (var p in contextIn) context[p] = p === \"access\" ? {} : contextIn[p];\r\n for (var p in contextIn.access) context.access[p] = contextIn.access[p];\r\n context.addInitializer = function (f) { if (done) throw new TypeError(\"Cannot add initializers after decoration has completed\"); extraInitializers.push(accept(f || null)); };\r\n var result = (0, decorators[i])(kind === \"accessor\" ? { get: descriptor.get, set: descriptor.set } : descriptor[key], context);\r\n if (kind === \"accessor\") {\r\n if (result === void 0) continue;\r\n if (result === null || typeof result !== \"object\") throw new TypeError(\"Object expected\");\r\n if (_ = accept(result.get)) descriptor.get = _;\r\n if (_ = accept(result.set)) descriptor.set = _;\r\n if (_ = accept(result.init)) initializers.unshift(_);\r\n }\r\n else if (_ = accept(result)) {\r\n if (kind === \"field\") initializers.unshift(_);\r\n else descriptor[key] = _;\r\n }\r\n }\r\n if (target) Object.defineProperty(target, contextIn.name, descriptor);\r\n done = true;\r\n};\r\n\r\nexport function __runInitializers(thisArg, initializers, value) {\r\n var useValue = arguments.length > 2;\r\n for (var i = 0; i < initializers.length; i++) {\r\n value = useValue ? initializers[i].call(thisArg, value) : initializers[i].call(thisArg);\r\n }\r\n return useValue ? value : void 0;\r\n};\r\n\r\nexport function __propKey(x) {\r\n return typeof x === \"symbol\" ? x : \"\".concat(x);\r\n};\r\n\r\nexport function __setFunctionName(f, name, prefix) {\r\n if (typeof name === \"symbol\") name = name.description ? \"[\".concat(name.description, \"]\") : \"\";\r\n return Object.defineProperty(f, \"name\", { configurable: true, value: prefix ? \"\".concat(prefix, \" \", name) : name });\r\n};\r\n\r\nexport function __metadata(metadataKey, metadataValue) {\r\n if (typeof Reflect === \"object\" && typeof Reflect.metadata === \"function\") return Reflect.metadata(metadataKey, metadataValue);\r\n}\r\n\r\nexport function __awaiter(thisArg, _arguments, P, generator) {\r\n function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }\r\n return new (P || (P = Promise))(function (resolve, reject) {\r\n function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }\r\n function rejected(value) { try { step(generator[\"throw\"](value)); } catch (e) { reject(e); } }\r\n function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }\r\n step((generator = generator.apply(thisArg, _arguments || [])).next());\r\n });\r\n}\r\n\r\nexport function __generator(thisArg, body) {\r\n var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g = Object.create((typeof Iterator === \"function\" ? Iterator : Object).prototype);\r\n return g.next = verb(0), g[\"throw\"] = verb(1), g[\"return\"] = verb(2), typeof Symbol === \"function\" && (g[Symbol.iterator] = function() { return this; }), g;\r\n function verb(n) { return function (v) { return step([n, v]); }; }\r\n function step(op) {\r\n if (f) throw new TypeError(\"Generator is already executing.\");\r\n while (g && (g = 0, op[0] && (_ = 0)), _) try {\r\n if (f = 1, y && (t = op[0] & 2 ? y[\"return\"] : op[0] ? y[\"throw\"] || ((t = y[\"return\"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;\r\n if (y = 0, t) op = [op[0] & 2, t.value];\r\n switch (op[0]) {\r\n case 0: case 1: t = op; break;\r\n case 4: _.label++; return { value: op[1], done: false };\r\n case 5: _.label++; y = op[1]; op = [0]; continue;\r\n case 7: op = _.ops.pop(); _.trys.pop(); continue;\r\n default:\r\n if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }\r\n if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }\r\n if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }\r\n if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }\r\n if (t[2]) _.ops.pop();\r\n _.trys.pop(); continue;\r\n }\r\n op = body.call(thisArg, _);\r\n } catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }\r\n if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };\r\n }\r\n}\r\n\r\nexport var __createBinding = Object.create ? (function(o, m, k, k2) {\r\n if (k2 === undefined) k2 = k;\r\n var desc = Object.getOwnPropertyDescriptor(m, k);\r\n if (!desc || (\"get\" in desc ? !m.__esModule : desc.writable || desc.configurable)) {\r\n desc = { enumerable: true, get: function() { return m[k]; } };\r\n }\r\n Object.defineProperty(o, k2, desc);\r\n}) : (function(o, m, k, k2) {\r\n if (k2 === undefined) k2 = k;\r\n o[k2] = m[k];\r\n});\r\n\r\nexport function __exportStar(m, o) {\r\n for (var p in m) if (p !== \"default\" && !Object.prototype.hasOwnProperty.call(o, p)) __createBinding(o, m, p);\r\n}\r\n\r\nexport function __values(o) {\r\n var s = typeof Symbol === \"function\" && Symbol.iterator, m = s && o[s], i = 0;\r\n if (m) return m.call(o);\r\n if (o && typeof o.length === \"number\") return {\r\n next: function () {\r\n if (o && i >= o.length) o = void 0;\r\n return { value: o && o[i++], done: !o };\r\n }\r\n };\r\n throw new TypeError(s ? \"Object is not iterable.\" : \"Symbol.iterator is not defined.\");\r\n}\r\n\r\nexport function __read(o, n) {\r\n var m = typeof Symbol === \"function\" && o[Symbol.iterator];\r\n if (!m) return o;\r\n var i = m.call(o), r, ar = [], e;\r\n try {\r\n while ((n === void 0 || n-- > 0) && !(r = i.next()).done) ar.push(r.value);\r\n }\r\n catch (error) { e = { error: error }; }\r\n finally {\r\n try {\r\n if (r && !r.done && (m = i[\"return\"])) m.call(i);\r\n }\r\n finally { if (e) throw e.error; }\r\n }\r\n return ar;\r\n}\r\n\r\n/** @deprecated */\r\nexport function __spread() {\r\n for (var ar = [], i = 0; i < arguments.length; i++)\r\n ar = ar.concat(__read(arguments[i]));\r\n return ar;\r\n}\r\n\r\n/** @deprecated */\r\nexport function __spreadArrays() {\r\n for (var s = 0, i = 0, il = arguments.length; i < il; i++) s += arguments[i].length;\r\n for (var r = Array(s), k = 0, i = 0; i < il; i++)\r\n for (var a = arguments[i], j = 0, jl = a.length; j < jl; j++, k++)\r\n r[k] = a[j];\r\n return r;\r\n}\r\n\r\nexport function __spreadArray(to, from, pack) {\r\n if (pack || arguments.length === 2) for (var i = 0, l = from.length, ar; i < l; i++) {\r\n if (ar || !(i in from)) {\r\n if (!ar) ar = Array.prototype.slice.call(from, 0, i);\r\n ar[i] = from[i];\r\n }\r\n }\r\n return to.concat(ar || Array.prototype.slice.call(from));\r\n}\r\n\r\nexport function __await(v) {\r\n return this instanceof __await ? (this.v = v, this) : new __await(v);\r\n}\r\n\r\nexport function __asyncGenerator(thisArg, _arguments, generator) {\r\n if (!Symbol.asyncIterator) throw new TypeError(\"Symbol.asyncIterator is not defined.\");\r\n var g = generator.apply(thisArg, _arguments || []), i, q = [];\r\n return i = Object.create((typeof AsyncIterator === \"function\" ? AsyncIterator : Object).prototype), verb(\"next\"), verb(\"throw\"), verb(\"return\", awaitReturn), i[Symbol.asyncIterator] = function () { return this; }, i;\r\n function awaitReturn(f) { return function (v) { return Promise.resolve(v).then(f, reject); }; }\r\n function verb(n, f) { if (g[n]) { i[n] = function (v) { return new Promise(function (a, b) { q.push([n, v, a, b]) > 1 || resume(n, v); }); }; if (f) i[n] = f(i[n]); } }\r\n function resume(n, v) { try { step(g[n](v)); } catch (e) { settle(q[0][3], e); } }\r\n function step(r) { r.value instanceof __await ? Promise.resolve(r.value.v).then(fulfill, reject) : settle(q[0][2], r); }\r\n function fulfill(value) { resume(\"next\", value); }\r\n function reject(value) { resume(\"throw\", value); }\r\n function settle(f, v) { if (f(v), q.shift(), q.length) resume(q[0][0], q[0][1]); }\r\n}\r\n\r\nexport function __asyncDelegator(o) {\r\n var i, p;\r\n return i = {}, verb(\"next\"), verb(\"throw\", function (e) { throw e; }), verb(\"return\"), i[Symbol.iterator] = function () { return this; }, i;\r\n function verb(n, f) { i[n] = o[n] ? function (v) { return (p = !p) ? { value: __await(o[n](v)), done: false } : f ? f(v) : v; } : f; }\r\n}\r\n\r\nexport function __asyncValues(o) {\r\n if (!Symbol.asyncIterator) throw new TypeError(\"Symbol.asyncIterator is not defined.\");\r\n var m = o[Symbol.asyncIterator], i;\r\n return m ? m.call(o) : (o = typeof __values === \"function\" ? __values(o) : o[Symbol.iterator](), i = {}, verb(\"next\"), verb(\"throw\"), verb(\"return\"), i[Symbol.asyncIterator] = function () { return this; }, i);\r\n function verb(n) { i[n] = o[n] && function (v) { return new Promise(function (resolve, reject) { v = o[n](v), settle(resolve, reject, v.done, v.value); }); }; }\r\n function settle(resolve, reject, d, v) { Promise.resolve(v).then(function(v) { resolve({ value: v, done: d }); }, reject); }\r\n}\r\n\r\nexport function __makeTemplateObject(cooked, raw) {\r\n if (Object.defineProperty) { Object.defineProperty(cooked, \"raw\", { value: raw }); } else { cooked.raw = raw; }\r\n return cooked;\r\n};\r\n\r\nvar __setModuleDefault = Object.create ? (function(o, v) {\r\n Object.defineProperty(o, \"default\", { enumerable: true, value: v });\r\n}) : function(o, v) {\r\n o[\"default\"] = v;\r\n};\r\n\r\nvar ownKeys = function(o) {\r\n ownKeys = Object.getOwnPropertyNames || function (o) {\r\n var ar = [];\r\n for (var k in o) if (Object.prototype.hasOwnProperty.call(o, k)) ar[ar.length] = k;\r\n return ar;\r\n };\r\n return ownKeys(o);\r\n};\r\n\r\nexport function __importStar(mod) {\r\n if (mod && mod.__esModule) return mod;\r\n var result = {};\r\n if (mod != null) for (var k = ownKeys(mod), i = 0; i < k.length; i++) if (k[i] !== \"default\") __createBinding(result, mod, k[i]);\r\n __setModuleDefault(result, mod);\r\n return result;\r\n}\r\n\r\nexport function __importDefault(mod) {\r\n return (mod && mod.__esModule) ? mod : { default: mod };\r\n}\r\n\r\nexport function __classPrivateFieldGet(receiver, state, kind, f) {\r\n if (kind === \"a\" && !f) throw new TypeError(\"Private accessor was defined without a getter\");\r\n if (typeof state === \"function\" ? receiver !== state || !f : !state.has(receiver)) throw new TypeError(\"Cannot read private member from an object whose class did not declare it\");\r\n return kind === \"m\" ? f : kind === \"a\" ? f.call(receiver) : f ? f.value : state.get(receiver);\r\n}\r\n\r\nexport function __classPrivateFieldSet(receiver, state, value, kind, f) {\r\n if (kind === \"m\") throw new TypeError(\"Private method is not writable\");\r\n if (kind === \"a\" && !f) throw new TypeError(\"Private accessor was defined without a setter\");\r\n if (typeof state === \"function\" ? receiver !== state || !f : !state.has(receiver)) throw new TypeError(\"Cannot write private member to an object whose class did not declare it\");\r\n return (kind === \"a\" ? f.call(receiver, value) : f ? f.value = value : state.set(receiver, value)), value;\r\n}\r\n\r\nexport function __classPrivateFieldIn(state, receiver) {\r\n if (receiver === null || (typeof receiver !== \"object\" && typeof receiver !== \"function\")) throw new TypeError(\"Cannot use 'in' operator on non-object\");\r\n return typeof state === \"function\" ? receiver === state : state.has(receiver);\r\n}\r\n\r\nexport function __addDisposableResource(env, value, async) {\r\n if (value !== null && value !== void 0) {\r\n if (typeof value !== \"object\" && typeof value !== \"function\") throw new TypeError(\"Object expected.\");\r\n var dispose, inner;\r\n if (async) {\r\n if (!Symbol.asyncDispose) throw new TypeError(\"Symbol.asyncDispose is not defined.\");\r\n dispose = value[Symbol.asyncDispose];\r\n }\r\n if (dispose === void 0) {\r\n if (!Symbol.dispose) throw new TypeError(\"Symbol.dispose is not defined.\");\r\n dispose = value[Symbol.dispose];\r\n if (async) inner = dispose;\r\n }\r\n if (typeof dispose !== \"function\") throw new TypeError(\"Object not disposable.\");\r\n if (inner) dispose = function() { try { inner.call(this); } catch (e) { return Promise.reject(e); } };\r\n env.stack.push({ value: value, dispose: dispose, async: async });\r\n }\r\n else if (async) {\r\n env.stack.push({ async: true });\r\n }\r\n return value;\r\n\r\n}\r\n\r\nvar _SuppressedError = typeof SuppressedError === \"function\" ? SuppressedError : function (error, suppressed, message) {\r\n var e = new Error(message);\r\n return e.name = \"SuppressedError\", e.error = error, e.suppressed = suppressed, e;\r\n};\r\n\r\nexport function __disposeResources(env) {\r\n function fail(e) {\r\n env.error = env.hasError ? new _SuppressedError(e, env.error, \"An error was suppressed during disposal.\") : e;\r\n env.hasError = true;\r\n }\r\n var r, s = 0;\r\n function next() {\r\n while (r = env.stack.pop()) {\r\n try {\r\n if (!r.async && s === 1) return s = 0, env.stack.push(r), Promise.resolve().then(next);\r\n if (r.dispose) {\r\n var result = r.dispose.call(r.value);\r\n if (r.async) return s |= 2, Promise.resolve(result).then(next, function(e) { fail(e); return next(); });\r\n }\r\n else s |= 1;\r\n }\r\n catch (e) {\r\n fail(e);\r\n }\r\n }\r\n if (s === 1) return env.hasError ? Promise.reject(env.error) : Promise.resolve();\r\n if (env.hasError) throw env.error;\r\n }\r\n return next();\r\n}\r\n\r\nexport function __rewriteRelativeImportExtension(path, preserveJsx) {\r\n if (typeof path === \"string\" && /^\\.\\.?\\//.test(path)) {\r\n return path.replace(/\\.(tsx)$|((?:\\.d)?)((?:\\.[^./]+?)?)\\.([cm]?)ts$/i, function (m, tsx, d, ext, cm) {\r\n return tsx ? preserveJsx ? \".jsx\" : \".js\" : d && (!ext || !cm) ? m : (d + ext + \".\" + cm.toLowerCase() + \"js\");\r\n });\r\n }\r\n return path;\r\n}\r\n\r\nexport default {\r\n __extends: __extends,\r\n __assign: __assign,\r\n __rest: __rest,\r\n __decorate: __decorate,\r\n __param: __param,\r\n __esDecorate: __esDecorate,\r\n __runInitializers: __runInitializers,\r\n __propKey: __propKey,\r\n __setFunctionName: __setFunctionName,\r\n __metadata: __metadata,\r\n __awaiter: __awaiter,\r\n __generator: __generator,\r\n __createBinding: __createBinding,\r\n __exportStar: __exportStar,\r\n __values: __values,\r\n __read: __read,\r\n __spread: __spread,\r\n __spreadArrays: __spreadArrays,\r\n __spreadArray: __spreadArray,\r\n __await: __await,\r\n __asyncGenerator: __asyncGenerator,\r\n __asyncDelegator: __asyncDelegator,\r\n __asyncValues: __asyncValues,\r\n __makeTemplateObject: __makeTemplateObject,\r\n __importStar: __importStar,\r\n __importDefault: __importDefault,\r\n __classPrivateFieldGet: __classPrivateFieldGet,\r\n __classPrivateFieldSet: __classPrivateFieldSet,\r\n __classPrivateFieldIn: __classPrivateFieldIn,\r\n __addDisposableResource: __addDisposableResource,\r\n __disposeResources: __disposeResources,\r\n __rewriteRelativeImportExtension: __rewriteRelativeImportExtension,\r\n};\r\n","/**\n * A standalone point geometry with useful accessor, comparison, and\n * modification methods.\n *\n * @class\n * @param {number} x the x-coordinate. This could be longitude or screen pixels, or any other sort of unit.\n * @param {number} y the y-coordinate. This could be latitude or screen pixels, or any other sort of unit.\n *\n * @example\n * const point = new Point(-77, 38);\n */\nexport default function Point(x, y) {\n this.x = x;\n this.y = y;\n}\n\nPoint.prototype = {\n /**\n * Clone this point, returning a new point that can be modified\n * without affecting the old one.\n * @return {Point} the clone\n */\n clone() { return new Point(this.x, this.y); },\n\n /**\n * Add this point's x & y coordinates to another point,\n * yielding a new point.\n * @param {Point} p the other point\n * @return {Point} output point\n */\n add(p) { return this.clone()._add(p); },\n\n /**\n * Subtract this point's x & y coordinates to from point,\n * yielding a new point.\n * @param {Point} p the other point\n * @return {Point} output point\n */\n sub(p) { return this.clone()._sub(p); },\n\n /**\n * Multiply this point's x & y coordinates by point,\n * yielding a new point.\n * @param {Point} p the other point\n * @return {Point} output point\n */\n multByPoint(p) { return this.clone()._multByPoint(p); },\n\n /**\n * Divide this point's x & y coordinates by point,\n * yielding a new point.\n * @param {Point} p the other point\n * @return {Point} output point\n */\n divByPoint(p) { return this.clone()._divByPoint(p); },\n\n /**\n * Multiply this point's x & y coordinates by a factor,\n * yielding a new point.\n * @param {number} k factor\n * @return {Point} output point\n */\n mult(k) { return this.clone()._mult(k); },\n\n /**\n * Divide this point's x & y coordinates by a factor,\n * yielding a new point.\n * @param {number} k factor\n * @return {Point} output point\n */\n div(k) { return this.clone()._div(k); },\n\n /**\n * Rotate this point around the 0, 0 origin by an angle a,\n * given in radians\n * @param {number} a angle to rotate around, in radians\n * @return {Point} output point\n */\n rotate(a) { return this.clone()._rotate(a); },\n\n /**\n * Rotate this point around p point by an angle a,\n * given in radians\n * @param {number} a angle to rotate around, in radians\n * @param {Point} p Point to rotate around\n * @return {Point} output point\n */\n rotateAround(a, p) { return this.clone()._rotateAround(a, p); },\n\n /**\n * Multiply this point by a 4x1 transformation matrix\n * @param {[number, number, number, number]} m transformation matrix\n * @return {Point} output point\n */\n matMult(m) { return this.clone()._matMult(m); },\n\n /**\n * Calculate this point but as a unit vector from 0, 0, meaning\n * that the distance from the resulting point to the 0, 0\n * coordinate will be equal to 1 and the angle from the resulting\n * point to the 0, 0 coordinate will be the same as before.\n * @return {Point} unit vector point\n */\n unit() { return this.clone()._unit(); },\n\n /**\n * Compute a perpendicular point, where the new y coordinate\n * is the old x coordinate and the new x coordinate is the old y\n * coordinate multiplied by -1\n * @return {Point} perpendicular point\n */\n perp() { return this.clone()._perp(); },\n\n /**\n * Return a version of this point with the x & y coordinates\n * rounded to integers.\n * @return {Point} rounded point\n */\n round() { return this.clone()._round(); },\n\n /**\n * Return the magnitude of this point: this is the Euclidean\n * distance from the 0, 0 coordinate to this point's x and y\n * coordinates.\n * @return {number} magnitude\n */\n mag() {\n return Math.sqrt(this.x * this.x + this.y * this.y);\n },\n\n /**\n * Judge whether this point is equal to another point, returning\n * true or false.\n * @param {Point} other the other point\n * @return {boolean} whether the points are equal\n */\n equals(other) {\n return this.x === other.x &&\n this.y === other.y;\n },\n\n /**\n * Calculate the distance from this point to another point\n * @param {Point} p the other point\n * @return {number} distance\n */\n dist(p) {\n return Math.sqrt(this.distSqr(p));\n },\n\n /**\n * Calculate the distance from this point to another point,\n * without the square root step. Useful if you're comparing\n * relative distances.\n * @param {Point} p the other point\n * @return {number} distance\n */\n distSqr(p) {\n const dx = p.x - this.x,\n dy = p.y - this.y;\n return dx * dx + dy * dy;\n },\n\n /**\n * Get the angle from the 0, 0 coordinate to this point, in radians\n * coordinates.\n * @return {number} angle\n */\n angle() {\n return Math.atan2(this.y, this.x);\n },\n\n /**\n * Get the angle from this point to another point, in radians\n * @param {Point} b the other point\n * @return {number} angle\n */\n angleTo(b) {\n return Math.atan2(this.y - b.y, this.x - b.x);\n },\n\n /**\n * Get the angle between this point and another point, in radians\n * @param {Point} b the other point\n * @return {number} angle\n */\n angleWith(b) {\n return this.angleWithSep(b.x, b.y);\n },\n\n /**\n * Find the angle of the two vectors, solving the formula for\n * the cross product a x b = |a||b|sin(θ) for θ.\n * @param {number} x the x-coordinate\n * @param {number} y the y-coordinate\n * @return {number} the angle in radians\n */\n angleWithSep(x, y) {\n return Math.atan2(\n this.x * y - this.y * x,\n this.x * x + this.y * y);\n },\n\n /** @param {[number, number, number, number]} m */\n _matMult(m) {\n const x = m[0] * this.x + m[1] * this.y,\n y = m[2] * this.x + m[3] * this.y;\n this.x = x;\n this.y = y;\n return this;\n },\n\n /** @param {Point} p */\n _add(p) {\n this.x += p.x;\n this.y += p.y;\n return this;\n },\n\n /** @param {Point} p */\n _sub(p) {\n this.x -= p.x;\n this.y -= p.y;\n return this;\n },\n\n /** @param {number} k */\n _mult(k) {\n this.x *= k;\n this.y *= k;\n return this;\n },\n\n /** @param {number} k */\n _div(k) {\n this.x /= k;\n this.y /= k;\n return this;\n },\n\n /** @param {Point} p */\n _multByPoint(p) {\n this.x *= p.x;\n this.y *= p.y;\n return this;\n },\n\n /** @param {Point} p */\n _divByPoint(p) {\n this.x /= p.x;\n this.y /= p.y;\n return this;\n },\n\n _unit() {\n this._div(this.mag());\n return this;\n },\n\n _perp() {\n const y = this.y;\n this.y = this.x;\n this.x = -y;\n return this;\n },\n\n /** @param {number} angle */\n _rotate(angle) {\n const cos = Math.cos(angle),\n sin = Math.sin(angle),\n x = cos * this.x - sin * this.y,\n y = sin * this.x + cos * this.y;\n this.x = x;\n this.y = y;\n return this;\n },\n\n /**\n * @param {number} angle\n * @param {Point} p\n */\n _rotateAround(angle, p) {\n const cos = Math.cos(angle),\n sin = Math.sin(angle),\n x = p.x + cos * (this.x - p.x) - sin * (this.y - p.y),\n y = p.y + sin * (this.x - p.x) + cos * (this.y - p.y);\n this.x = x;\n this.y = y;\n return this;\n },\n\n _round() {\n this.x = Math.round(this.x);\n this.y = Math.round(this.y);\n return this;\n },\n\n constructor: Point\n};\n\n/**\n * Construct a point from an array if necessary, otherwise if the input\n * is already a Point, return it unchanged.\n * @param {Point | [number, number] | {x: number, y: number}} p input value\n * @return {Point} constructed point.\n * @example\n * // this\n * var point = Point.convert([0, 1]);\n * // is equivalent to\n * var point = new Point(0, 1);\n */\nPoint.convert = function (p) {\n if (p instanceof Point) {\n return /** @type {Point} */ (p);\n }\n if (Array.isArray(p)) {\n return new Point(+p[0], +p[1]);\n }\n if (p.x !== undefined && p.y !== undefined) {\n return new Point(+p.x, +p.y);\n }\n throw new Error('Expected [x, y] or {x, y} point format');\n};\n","'use strict';\n\nmodule.exports = UnitBezier;\n\nfunction UnitBezier(p1x, p1y, p2x, p2y) {\n // Calculate the polynomial coefficients, implicit first and last control points are (0,0) and (1,1).\n this.cx = 3.0 * p1x;\n this.bx = 3.0 * (p2x - p1x) - this.cx;\n this.ax = 1.0 - this.cx - this.bx;\n\n this.cy = 3.0 * p1y;\n this.by = 3.0 * (p2y - p1y) - this.cy;\n this.ay = 1.0 - this.cy - this.by;\n\n this.p1x = p1x;\n this.p1y = p1y;\n this.p2x = p2x;\n this.p2y = p2y;\n}\n\nUnitBezier.prototype = {\n sampleCurveX: function (t) {\n // `ax t^3 + bx t^2 + cx t' expanded using Horner's rule.\n return ((this.ax * t + this.bx) * t + this.cx) * t;\n },\n\n sampleCurveY: function (t) {\n return ((this.ay * t + this.by) * t + this.cy) * t;\n },\n\n sampleCurveDerivativeX: function (t) {\n return (3.0 * this.ax * t + 2.0 * this.bx) * t + this.cx;\n },\n\n solveCurveX: function (x, epsilon) {\n if (epsilon === undefined) epsilon = 1e-6;\n\n if (x < 0.0) return 0.0;\n if (x > 1.0) return 1.0;\n\n var t = x;\n\n // First try a few iterations of Newton's method - normally very fast.\n for (var i = 0; i < 8; i++) {\n var x2 = this.sampleCurveX(t) - x;\n if (Math.abs(x2) < epsilon) return t;\n\n var d2 = this.sampleCurveDerivativeX(t);\n if (Math.abs(d2) < 1e-6) break;\n\n t = t - x2 / d2;\n }\n\n // Fall back to the bisection method for reliability.\n var t0 = 0.0;\n var t1 = 1.0;\n t = x;\n\n for (i = 0; i < 20; i++) {\n x2 = this.sampleCurveX(t);\n if (Math.abs(x2 - x) < epsilon) break;\n\n if (x > x2) {\n t0 = t;\n } else {\n t1 = t;\n }\n\n t = (t1 - t0) * 0.5 + t0;\n }\n\n return t;\n },\n\n solve: function (x, epsilon) {\n return this.sampleCurveY(this.solveCurveX(x, epsilon));\n }\n};\n","let supportsOffscreenCanvas: boolean;\n\nexport function offscreenCanvasSupported(): boolean {\n supportsOffscreenCanvas ??= typeof OffscreenCanvas !== 'undefined' &&\n new OffscreenCanvas(1, 1).getContext('2d') &&\n typeof createImageBitmap === 'function';\n\n return supportsOffscreenCanvas;\n}\n","import {offscreenCanvasSupported} from './offscreen_canvas_supported';\n\nlet offscreenCanvasDistorted: boolean;\n\n/**\n * Some browsers don't return the exact pixels from a canvas to prevent user fingerprinting (see #3185).\n * This function writes pixels to an OffscreenCanvas and reads them back using getImageData, returning false\n * if they don't match.\n *\n * @returns true if the browser supports OffscreenCanvas but it distorts getImageData results, false otherwise.\n */\nexport function isOffscreenCanvasDistorted(): boolean {\n if (offscreenCanvasDistorted == null) {\n offscreenCanvasDistorted = false;\n if (offscreenCanvasSupported()) {\n const size = 5;\n const canvas = new OffscreenCanvas(size, size);\n const context = canvas.getContext('2d', {willReadFrequently: true});\n if (context) {\n // fill each pixel with an RGB value that should make the byte at index i equal to i (except alpha channel):\n // [0, 1, 2, 255, 4, 5, 6, 255, 8, 9, 10, 255, ...]\n for (let i = 0; i < size * size; i++) {\n const base = i * 4;\n context.fillStyle = `rgb(${base},${base + 1},${base + 2})`;\n context.fillRect(i % size, Math.floor(i / size), 1, 1);\n }\n const data = context.getImageData(0, 0, size, size).data;\n for (let i = 0; i < size * size * 4; i++) {\n if (i % 4 !== 3 && data[i] !== i) {\n offscreenCanvasDistorted = true;\n break;\n }\n }\n }\n }\n }\n\n return offscreenCanvasDistorted || false;\n}\n","/**\n * Common utilities\n * @module glMatrix\n */\n\n// Configuration Constants\nexport var EPSILON = 0.000001;\nexport var ARRAY_TYPE = typeof Float32Array !== \"undefined\" ? Float32Array : Array;\nexport var RANDOM = Math.random;\nexport var ANGLE_ORDER = \"zyx\";\n\n/**\n * Symmetric round\n * see https://www.npmjs.com/package/round-half-up-symmetric#user-content-detailed-background\n *\n * @param {Number} a value to round\n */\nexport function round(a) {\n if (a >= 0) return Math.round(a);\n return a % 0.5 === 0 ? Math.floor(a) : Math.round(a);\n}\n\n/**\n * Sets the type of array used when creating new vectors and matrices\n *\n * @param {Float32ArrayConstructor | ArrayConstructor} type Array type, such as Float32Array or Array\n */\nexport function setMatrixArrayType(type) {\n ARRAY_TYPE = type;\n}\nvar degree = Math.PI / 180;\nvar radian = 180 / Math.PI;\n\n/**\n * Convert Degree To Radian\n *\n * @param {Number} a Angle in Degrees\n */\nexport function toRadian(a) {\n return a * degree;\n}\n\n/**\n * Convert Radian To Degree\n *\n * @param {Number} a Angle in Radians\n */\nexport function toDegree(a) {\n return a * radian;\n}\n\n/**\n * Tests whether or not the arguments have approximately the same value, within an absolute\n * or relative tolerance of glMatrix.EPSILON (an absolute tolerance is used for values less\n * than or equal to 1.0, and a relative tolerance is used for larger values)\n *\n * @param {Number} a The first number to test.\n * @param {Number} b The second number to test.\n * @param {Number} tolerance Absolute or relative tolerance (default glMatrix.EPSILON)\n * @returns {Boolean} True if the numbers are approximately equal, false otherwise.\n */\nexport function equals(a, b) {\n var tolerance = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : EPSILON;\n return Math.abs(a - b) <= tolerance * Math.max(1, Math.abs(a), Math.abs(b));\n}","import * as glMatrix from \"./common.js\";\n\n/**\n * 3x3 Matrix\n * @module mat3\n */\n\n/**\n * Creates a new identity mat3\n *\n * @returns {mat3} a new 3x3 matrix\n */\nexport function create() {\n var out = new glMatrix.ARRAY_TYPE(9);\n if (glMatrix.ARRAY_TYPE != Float32Array) {\n out[1] = 0;\n out[2] = 0;\n out[3] = 0;\n out[5] = 0;\n out[6] = 0;\n out[7] = 0;\n }\n out[0] = 1;\n out[4] = 1;\n out[8] = 1;\n return out;\n}\n\n/**\n * Copies the upper-left 3x3 values into the given mat3.\n *\n * @param {mat3} out the receiving 3x3 matrix\n * @param {ReadonlyMat4} a the source 4x4 matrix\n * @returns {mat3} out\n */\nexport function fromMat4(out, a) {\n out[0] = a[0];\n out[1] = a[1];\n out[2] = a[2];\n out[3] = a[4];\n out[4] = a[5];\n out[5] = a[6];\n out[6] = a[8];\n out[7] = a[9];\n out[8] = a[10];\n return out;\n}\n\n/**\n * Creates a new mat3 initialized with values from an existing matrix\n *\n * @param {ReadonlyMat3} a matrix to clone\n * @returns {mat3} a new 3x3 matrix\n */\nexport function clone(a) {\n var out = new glMatrix.ARRAY_TYPE(9);\n out[0] = a[0];\n out[1] = a[1];\n out[2] = a[2];\n out[3] = a[3];\n out[4] = a[4];\n out[5] = a[5];\n out[6] = a[6];\n out[7] = a[7];\n out[8] = a[8];\n return out;\n}\n\n/**\n * Copy the values from one mat3 to another\n *\n * @param {mat3} out the receiving matrix\n * @param {ReadonlyMat3} a the source matrix\n * @returns {mat3} out\n */\nexport function copy(out, a) {\n out[0] = a[0];\n out[1] = a[1];\n out[2] = a[2];\n out[3] = a[3];\n out[4] = a[4];\n out[5] = a[5];\n out[6] = a[6];\n out[7] = a[7];\n out[8] = a[8];\n return out;\n}\n\n/**\n * Create a new mat3 with the given values\n *\n * @param {Number} m00 Component in column 0, row 0 position (index 0)\n * @param {Number} m01 Component in column 0, row 1 position (index 1)\n * @param {Number} m02 Component in column 0, row 2 position (index 2)\n * @param {Number} m10 Component in column 1, row 0 position (index 3)\n * @param {Number} m11 Component in column 1, row 1 position (index 4)\n * @param {Number} m12 Component in column 1, row 2 position (index 5)\n * @param {Number} m20 Component in column 2, row 0 position (index 6)\n * @param {Number} m21 Component in column 2, row 1 position (index 7)\n * @param {Number} m22 Component in column 2, row 2 position (index 8)\n * @returns {mat3} A new mat3\n */\nexport function fromValues(m00, m01, m02, m10, m11, m12, m20, m21, m22) {\n var out = new glMatrix.ARRAY_TYPE(9);\n out[0] = m00;\n out[1] = m01;\n out[2] = m02;\n out[3] = m10;\n out[4] = m11;\n out[5] = m12;\n out[6] = m20;\n out[7] = m21;\n out[8] = m22;\n return out;\n}\n\n/**\n * Set the components of a mat3 to the given values\n *\n * @param {mat3} out the receiving matrix\n * @param {Number} m00 Component in column 0, row 0 position (index 0)\n * @param {Number} m01 Component in column 0, row 1 position (index 1)\n * @param {Number} m02 Component in column 0, row 2 position (index 2)\n * @param {Number} m10 Component in column 1, row 0 position (index 3)\n * @param {Number} m11 Component in column 1, row 1 position (index 4)\n * @param {Number} m12 Component in column 1, row 2 position (index 5)\n * @param {Number} m20 Component in column 2, row 0 position (index 6)\n * @param {Number} m21 Component in column 2, row 1 position (index 7)\n * @param {Number} m22 Component in column 2, row 2 position (index 8)\n * @returns {mat3} out\n */\nexport function set(out, m00, m01, m02, m10, m11, m12, m20, m21, m22) {\n out[0] = m00;\n out[1] = m01;\n out[2] = m02;\n out[3] = m10;\n out[4] = m11;\n out[5] = m12;\n out[6] = m20;\n out[7] = m21;\n out[8] = m22;\n return out;\n}\n\n/**\n * Set a mat3 to the identity matrix\n *\n * @param {mat3} out the receiving matrix\n * @returns {mat3} out\n */\nexport function identity(out) {\n out[0] = 1;\n out[1] = 0;\n out[2] = 0;\n out[3] = 0;\n out[4] = 1;\n out[5] = 0;\n out[6] = 0;\n out[7] = 0;\n out[8] = 1;\n return out;\n}\n\n/**\n * Transpose the values of a mat3\n *\n * @param {mat3} out the receiving matrix\n * @param {ReadonlyMat3} a the source matrix\n * @returns {mat3} out\n */\nexport function transpose(out, a) {\n // If we are transposing ourselves we can skip a few steps but have to cache some values\n if (out === a) {\n var a01 = a[1],\n a02 = a[2],\n a12 = a[5];\n out[1] = a[3];\n out[2] = a[6];\n out[3] = a01;\n out[5] = a[7];\n out[6] = a02;\n out[7] = a12;\n } else {\n out[0] = a[0];\n out[1] = a[3];\n out[2] = a[6];\n out[3] = a[1];\n out[4] = a[4];\n out[5] = a[7];\n out[6] = a[2];\n out[7] = a[5];\n out[8] = a[8];\n }\n return out;\n}\n\n/**\n * Inverts a mat3\n *\n * @param {mat3} out the receiving matrix\n * @param {ReadonlyMat3} a the source matrix\n * @returns {mat3 | null} out, or null if source matrix is not invertible\n */\nexport function invert(out, a) {\n var a00 = a[0],\n a01 = a[1],\n a02 = a[2];\n var a10 = a[3],\n a11 = a[4],\n a12 = a[5];\n var a20 = a[6],\n a21 = a[7],\n a22 = a[8];\n var b01 = a22 * a11 - a12 * a21;\n var b11 = -a22 * a10 + a12 * a20;\n var b21 = a21 * a10 - a11 * a20;\n\n // Calculate the determinant\n var det = a00 * b01 + a01 * b11 + a02 * b21;\n if (!det) {\n return null;\n }\n det = 1.0 / det;\n out[0] = b01 * det;\n out[1] = (-a22 * a01 + a02 * a21) * det;\n out[2] = (a12 * a01 - a02 * a11) * det;\n out[3] = b11 * det;\n out[4] = (a22 * a00 - a02 * a20) * det;\n out[5] = (-a12 * a00 + a02 * a10) * det;\n out[6] = b21 * det;\n out[7] = (-a21 * a00 + a01 * a20) * det;\n out[8] = (a11 * a00 - a01 * a10) * det;\n return out;\n}\n\n/**\n * Calculates the adjugate of a mat3\n *\n * @param {mat3} out the receiving matrix\n * @param {ReadonlyMat3} a the source matrix\n * @returns {mat3} out\n */\nexport function adjoint(out, a) {\n var a00 = a[0],\n a01 = a[1],\n a02 = a[2];\n var a10 = a[3],\n a11 = a[4],\n a12 = a[5];\n var a20 = a[6],\n a21 = a[7],\n a22 = a[8];\n out[0] = a11 * a22 - a12 * a21;\n out[1] = a02 * a21 - a01 * a22;\n out[2] = a01 * a12 - a02 * a11;\n out[3] = a12 * a20 - a10 * a22;\n out[4] = a00 * a22 - a02 * a20;\n out[5] = a02 * a10 - a00 * a12;\n out[6] = a10 * a21 - a11 * a20;\n out[7] = a01 * a20 - a00 * a21;\n out[8] = a00 * a11 - a01 * a10;\n return out;\n}\n\n/**\n * Calculates the determinant of a mat3\n *\n * @param {ReadonlyMat3} a the source matrix\n * @returns {Number} determinant of a\n */\nexport function determinant(a) {\n var a00 = a[0],\n a01 = a[1],\n a02 = a[2];\n var a10 = a[3],\n a11 = a[4],\n a12 = a[5];\n var a20 = a[6],\n a21 = a[7],\n a22 = a[8];\n return a00 * (a22 * a11 - a12 * a21) + a01 * (-a22 * a10 + a12 * a20) + a02 * (a21 * a10 - a11 * a20);\n}\n\n/**\n * Multiplies two mat3's\n *\n * @param {mat3} out the receiving matrix\n * @param {ReadonlyMat3} a the first operand\n * @param {ReadonlyMat3} b the second operand\n * @returns {mat3} out\n */\nexport function multiply(out, a, b) {\n var a00 = a[0],\n a01 = a[1],\n a02 = a[2];\n var a10 = a[3],\n a11 = a[4],\n a12 = a[5];\n var a20 = a[6],\n a21 = a[7],\n a22 = a[8];\n var b00 = b[0],\n b01 = b[1],\n b02 = b[2];\n var b10 = b[3],\n b11 = b[4],\n b12 = b[5];\n var b20 = b[6],\n b21 = b[7],\n b22 = b[8];\n out[0] = b00 * a00 + b01 * a10 + b02 * a20;\n out[1] = b00 * a01 + b01 * a11 + b02 * a21;\n out[2] = b00 * a02 + b01 * a12 + b02 * a22;\n out[3] = b10 * a00 + b11 * a10 + b12 * a20;\n out[4] = b10 * a01 + b11 * a11 + b12 * a21;\n out[5] = b10 * a02 + b11 * a12 + b12 * a22;\n out[6] = b20 * a00 + b21 * a10 + b22 * a20;\n out[7] = b20 * a01 + b21 * a11 + b22 * a21;\n out[8] = b20 * a02 + b21 * a12 + b22 * a22;\n return out;\n}\n\n/**\n * Translate a mat3 by the given vector\n *\n * @param {mat3} out the receiving matrix\n * @param {ReadonlyMat3} a the matrix to translate\n * @param {ReadonlyVec2} v vector to translate by\n * @returns {mat3} out\n */\nexport function translate(out, a, v) {\n var a00 = a[0],\n a01 = a[1],\n a02 = a[2],\n a10 = a[3],\n a11 = a[4],\n a12 = a[5],\n a20 = a[6],\n a21 = a[7],\n a22 = a[8],\n x = v[0],\n y = v[1];\n out[0] = a00;\n out[1] = a01;\n out[2] = a02;\n out[3] = a10;\n out[4] = a11;\n out[5] = a12;\n out[6] = x * a00 + y * a10 + a20;\n out[7] = x * a01 + y * a11 + a21;\n out[8] = x * a02 + y * a12 + a22;\n return out;\n}\n\n/**\n * Rotates a mat3 by the given angle\n *\n * @param {mat3} out the receiving matrix\n * @param {ReadonlyMat3} a the matrix to rotate\n * @param {Number} rad the angle to rotate the matrix by\n * @returns {mat3} out\n */\nexport function rotate(out, a, rad) {\n var a00 = a[0],\n a01 = a[1],\n a02 = a[2],\n a10 = a[3],\n a11 = a[4],\n a12 = a[5],\n a20 = a[6],\n a21 = a[7],\n a22 = a[8],\n s = Math.sin(rad),\n c = Math.cos(rad);\n out[0] = c * a00 + s * a10;\n out[1] = c * a01 + s * a11;\n out[2] = c * a02 + s * a12;\n out[3] = c * a10 - s * a00;\n out[4] = c * a11 - s * a01;\n out[5] = c * a12 - s * a02;\n out[6] = a20;\n out[7] = a21;\n out[8] = a22;\n return out;\n}\n\n/**\n * Scales the mat3 by the dimensions in the given vec2\n *\n * @param {mat3} out the receiving matrix\n * @param {ReadonlyMat3} a the matrix to scale\n * @param {ReadonlyVec2} v the vec2 to scale the matrix by\n * @returns {mat3} out\n **/\nexport function scale(out, a, v) {\n var x = v[0],\n y = v[1];\n out[0] = x * a[0];\n out[1] = x * a[1];\n out[2] = x * a[2];\n out[3] = y * a[3];\n out[4] = y * a[4];\n out[5] = y * a[5];\n out[6] = a[6];\n out[7] = a[7];\n out[8] = a[8];\n return out;\n}\n\n/**\n * Creates a matrix from a vector translation\n * This is equivalent to (but much faster than):\n *\n * mat3.identity(dest);\n * mat3.translate(dest, dest, vec);\n *\n * @param {mat3} out mat3 receiving operation result\n * @param {ReadonlyVec2} v Translation vector\n * @returns {mat3} out\n */\nexport function fromTranslation(out, v) {\n out[0] = 1;\n out[1] = 0;\n out[2] = 0;\n out[3] = 0;\n out[4] = 1;\n out[5] = 0;\n out[6] = v[0];\n out[7] = v[1];\n out[8] = 1;\n return out;\n}\n\n/**\n * Creates a matrix from a given angle\n * This is equivalent to (but much faster than):\n *\n * mat3.identity(dest);\n * mat3.rotate(dest, dest, rad);\n *\n * @param {mat3} out mat3 receiving operation result\n * @param {Number} rad the angle to rotate the matrix by\n * @returns {mat3} out\n */\nexport function fromRotation(out, rad) {\n var s = Math.sin(rad),\n c = Math.cos(rad);\n out[0] = c;\n out[1] = s;\n out[2] = 0;\n out[3] = -s;\n out[4] = c;\n out[5] = 0;\n out[6] = 0;\n out[7] = 0;\n out[8] = 1;\n return out;\n}\n\n/**\n * Creates a matrix from a vector scaling\n * This is equivalent to (but much faster than):\n *\n * mat3.identity(dest);\n * mat3.scale(dest, dest, vec);\n *\n * @param {mat3} out mat3 receiving operation result\n * @param {ReadonlyVec2} v Scaling vector\n * @returns {mat3} out\n */\nexport function fromScaling(out, v) {\n out[0] = v[0];\n out[1] = 0;\n out[2] = 0;\n out[3] = 0;\n out[4] = v[1];\n out[5] = 0;\n out[6] = 0;\n out[7] = 0;\n out[8] = 1;\n return out;\n}\n\n/**\n * Copies the values from a mat2d into a mat3\n *\n * @param {mat3} out the receiving matrix\n * @param {ReadonlyMat2d} a the matrix to copy\n * @returns {mat3} out\n **/\nexport function fromMat2d(out, a) {\n out[0] = a[0];\n out[1] = a[1];\n out[2] = 0;\n out[3] = a[2];\n out[4] = a[3];\n out[5] = 0;\n out[6] = a[4];\n out[7] = a[5];\n out[8] = 1;\n return out;\n}\n\n/**\n * Calculates a 3x3 matrix from the given quaternion\n *\n * @param {mat3} out mat3 receiving operation result\n * @param {ReadonlyQuat} q Quaternion to create matrix from\n *\n * @returns {mat3} out\n */\nexport function fromQuat(out, q) {\n var x = q[0],\n y = q[1],\n z = q[2],\n w = q[3];\n var x2 = x + x;\n var y2 = y + y;\n var z2 = z + z;\n var xx = x * x2;\n var yx = y * x2;\n var yy = y * y2;\n var zx = z * x2;\n var zy = z * y2;\n var zz = z * z2;\n var wx = w * x2;\n var wy = w * y2;\n var wz = w * z2;\n out[0] = 1 - yy - zz;\n out[3] = yx - wz;\n out[6] = zx + wy;\n out[1] = yx + wz;\n out[4] = 1 - xx - zz;\n out[7] = zy - wx;\n out[2] = zx - wy;\n out[5] = zy + wx;\n out[8] = 1 - xx - yy;\n return out;\n}\n\n/**\n * Calculates a 3x3 normal matrix (transpose inverse) from the 4x4 matrix\n *\n * @param {mat3} out mat3 receiving operation result\n * @param {ReadonlyMat4} a Mat4 to derive the normal matrix from\n *\n * @returns {mat3} out\n */\nexport function normalFromMat4(out, a) {\n var a00 = a[0],\n a01 = a[1],\n a02 = a[2],\n a03 = a[3];\n var a10 = a[4],\n a11 = a[5],\n a12 = a[6],\n a13 = a[7];\n var a20 = a[8],\n a21 = a[9],\n a22 = a[10],\n a23 = a[11];\n var a30 = a[12],\n a31 = a[13],\n a32 = a[14],\n a33 = a[15];\n var b00 = a00 * a11 - a01 * a10;\n var b01 = a00 * a12 - a02 * a10;\n var b02 = a00 * a13 - a03 * a10;\n var b03 = a01 * a12 - a02 * a11;\n var b04 = a01 * a13 - a03 * a11;\n var b05 = a02 * a13 - a03 * a12;\n var b06 = a20 * a31 - a21 * a30;\n var b07 = a20 * a32 - a22 * a30;\n var b08 = a20 * a33 - a23 * a30;\n var b09 = a21 * a32 - a22 * a31;\n var b10 = a21 * a33 - a23 * a31;\n var b11 = a22 * a33 - a23 * a32;\n\n // Calculate the determinant\n var det = b00 * b11 - b01 * b10 + b02 * b09 + b03 * b08 - b04 * b07 + b05 * b06;\n if (!det) {\n return null;\n }\n det = 1.0 / det;\n out[0] = (a11 * b11 - a12 * b10 + a13 * b09) * det;\n out[1] = (a12 * b08 - a10 * b11 - a13 * b07) * det;\n out[2] = (a10 * b10 - a11 * b08 + a13 * b06) * det;\n out[3] = (a02 * b10 - a01 * b11 - a03 * b09) * det;\n out[4] = (a00 * b11 - a02 * b08 + a03 * b07) * det;\n out[5] = (a01 * b08 - a00 * b10 - a03 * b06) * det;\n out[6] = (a31 * b05 - a32 * b04 + a33 * b03) * det;\n out[7] = (a32 * b02 - a30 * b05 - a33 * b01) * det;\n out[8] = (a30 * b04 - a31 * b02 + a33 * b00) * det;\n return out;\n}\n\n/**\n * Generates a 2D projection matrix with the given bounds\n *\n * @param {mat3} out mat3 frustum matrix will be written into\n * @param {number} width Width of your gl context\n * @param {number} height Height of gl context\n * @returns {mat3} out\n */\nexport function projection(out, width, height) {\n out[0] = 2 / width;\n out[1] = 0;\n out[2] = 0;\n out[3] = 0;\n out[4] = -2 / height;\n out[5] = 0;\n out[6] = -1;\n out[7] = 1;\n out[8] = 1;\n return out;\n}\n\n/**\n * Returns a string representation of a mat3\n *\n * @param {ReadonlyMat3} a matrix to represent as a string\n * @returns {String} string representation of the matrix\n */\nexport function str(a) {\n return \"mat3(\" + a[0] + \", \" + a[1] + \", \" + a[2] + \", \" + a[3] + \", \" + a[4] + \", \" + a[5] + \", \" + a[6] + \", \" + a[7] + \", \" + a[8] + \")\";\n}\n\n/**\n * Returns Frobenius norm of a mat3\n *\n * @param {ReadonlyMat3} a the matrix to calculate Frobenius norm of\n * @returns {Number} Frobenius norm\n */\nexport function frob(a) {\n return Math.sqrt(a[0] * a[0] + a[1] * a[1] + a[2] * a[2] + a[3] * a[3] + a[4] * a[4] + a[5] * a[5] + a[6] * a[6] + a[7] * a[7] + a[8] * a[8]);\n}\n\n/**\n * Adds two mat3's\n *\n * @param {mat3} out the receiving matrix\n * @param {ReadonlyMat3} a the first operand\n * @param {ReadonlyMat3} b the second operand\n * @returns {mat3} out\n */\nexport function add(out, a, b) {\n out[0] = a[0] + b[0];\n out[1] = a[1] + b[1];\n out[2] = a[2] + b[2];\n out[3] = a[3] + b[3];\n out[4] = a[4] + b[4];\n out[5] = a[5] + b[5];\n out[6] = a[6] + b[6];\n out[7] = a[7] + b[7];\n out[8] = a[8] + b[8];\n return out;\n}\n\n/**\n * Subtracts matrix b from matrix a\n *\n * @param {mat3} out the receiving matrix\n * @param {ReadonlyMat3} a the first operand\n * @param {ReadonlyMat3} b the second operand\n * @returns {mat3} out\n */\nexport function subtract(out, a, b) {\n out[0] = a[0] - b[0];\n out[1] = a[1] - b[1];\n out[2] = a[2] - b[2];\n out[3] = a[3] - b[3];\n out[4] = a[4] - b[4];\n out[5] = a[5] - b[5];\n out[6] = a[6] - b[6];\n out[7] = a[7] - b[7];\n out[8] = a[8] - b[8];\n return out;\n}\n\n/**\n * Multiply each element of the matrix by a scalar.\n *\n * @param {mat3} out the receiving matrix\n * @param {ReadonlyMat3} a the matrix to scale\n * @param {Number} b amount to scale the matrix's elements by\n * @returns {mat3} out\n */\nexport function multiplyScalar(out, a, b) {\n out[0] = a[0] * b;\n out[1] = a[1] * b;\n out[2] = a[2] * b;\n out[3] = a[3] * b;\n out[4] = a[4] * b;\n out[5] = a[5] * b;\n out[6] = a[6] * b;\n out[7] = a[7] * b;\n out[8] = a[8] * b;\n return out;\n}\n\n/**\n * Adds two mat3's after multiplying each element of the second operand by a scalar value.\n *\n * @param {mat3} out the receiving vector\n * @param {ReadonlyMat3} a the first operand\n * @param {ReadonlyMat3} b the second operand\n * @param {Number} scale the amount to scale b's elements by before adding\n * @returns {mat3} out\n */\nexport function multiplyScalarAndAdd(out, a, b, scale) {\n out[0] = a[0] + b[0] * scale;\n out[1] = a[1] + b[1] * scale;\n out[2] = a[2] + b[2] * scale;\n out[3] = a[3] + b[3] * scale;\n out[4] = a[4] + b[4] * scale;\n out[5] = a[5] + b[5] * scale;\n out[6] = a[6] + b[6] * scale;\n out[7] = a[7] + b[7] * scale;\n out[8] = a[8] + b[8] * scale;\n return out;\n}\n\n/**\n * Returns whether or not the matrices have exactly the same elements in the same position (when compared with ===)\n *\n * @param {ReadonlyMat3} a The first matrix.\n * @param {ReadonlyMat3} b The second matrix.\n * @returns {Boolean} True if the matrices are equal, false otherwise.\n */\nexport function exactEquals(a, b) {\n return a[0] === b[0] && a[1] === b[1] && a[2] === b[2] && a[3] === b[3] && a[4] === b[4] && a[5] === b[5] && a[6] === b[6] && a[7] === b[7] && a[8] === b[8];\n}\n\n/**\n * Returns whether or not the matrices have approximately the same elements in the same position.\n *\n * @param {ReadonlyMat3} a The first matrix.\n * @param {ReadonlyMat3} b The second matrix.\n * @returns {Boolean} True if the matrices are equal, false otherwise.\n */\nexport function equals(a, b) {\n var a0 = a[0],\n a1 = a[1],\n a2 = a[2],\n a3 = a[3],\n a4 = a[4],\n a5 = a[5],\n a6 = a[6],\n a7 = a[7],\n a8 = a[8];\n var b0 = b[0],\n b1 = b[1],\n b2 = b[2],\n b3 = b[3],\n b4 = b[4],\n b5 = b[5],\n b6 = b[6],\n b7 = b[7],\n b8 = b[8];\n return Math.abs(a0 - b0) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a0), Math.abs(b0)) && Math.abs(a1 - b1) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a1), Math.abs(b1)) && Math.abs(a2 - b2) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a2), Math.abs(b2)) && Math.abs(a3 - b3) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a3), Math.abs(b3)) && Math.abs(a4 - b4) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a4), Math.abs(b4)) && Math.abs(a5 - b5) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a5), Math.abs(b5)) && Math.abs(a6 - b6) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a6), Math.abs(b6)) && Math.abs(a7 - b7) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a7), Math.abs(b7)) && Math.abs(a8 - b8) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a8), Math.abs(b8));\n}\n\n/**\n * Alias for {@link mat3.multiply}\n * @function\n */\nexport var mul = multiply;\n\n/**\n * Alias for {@link mat3.subtract}\n * @function\n */\nexport var sub = subtract;","import * as glMatrix from \"./common.js\";\n\n/**\n * 4x4 Matrix
Format: column-major, when typed out it looks like row-major
The matrices are being post multiplied.\n * @module mat4\n */\n\n/**\n * Creates a new identity mat4\n *\n * @returns {mat4} a new 4x4 matrix\n */\nexport function create() {\n var out = new glMatrix.ARRAY_TYPE(16);\n if (glMatrix.ARRAY_TYPE != Float32Array) {\n out[1] = 0;\n out[2] = 0;\n out[3] = 0;\n out[4] = 0;\n out[6] = 0;\n out[7] = 0;\n out[8] = 0;\n out[9] = 0;\n out[11] = 0;\n out[12] = 0;\n out[13] = 0;\n out[14] = 0;\n }\n out[0] = 1;\n out[5] = 1;\n out[10] = 1;\n out[15] = 1;\n return out;\n}\n\n/**\n * Creates a new mat4 initialized with values from an existing matrix\n *\n * @param {ReadonlyMat4} a matrix to clone\n * @returns {mat4} a new 4x4 matrix\n */\nexport function clone(a) {\n var out = new glMatrix.ARRAY_TYPE(16);\n out[0] = a[0];\n out[1] = a[1];\n out[2] = a[2];\n out[3] = a[3];\n out[4] = a[4];\n out[5] = a[5];\n out[6] = a[6];\n out[7] = a[7];\n out[8] = a[8];\n out[9] = a[9];\n out[10] = a[10];\n out[11] = a[11];\n out[12] = a[12];\n out[13] = a[13];\n out[14] = a[14];\n out[15] = a[15];\n return out;\n}\n\n/**\n * Copy the values from one mat4 to another\n *\n * @param {mat4} out the receiving matrix\n * @param {ReadonlyMat4} a the source matrix\n * @returns {mat4} out\n */\nexport function copy(out, a) {\n out[0] = a[0];\n out[1] = a[1];\n out[2] = a[2];\n out[3] = a[3];\n out[4] = a[4];\n out[5] = a[5];\n out[6] = a[6];\n out[7] = a[7];\n out[8] = a[8];\n out[9] = a[9];\n out[10] = a[10];\n out[11] = a[11];\n out[12] = a[12];\n out[13] = a[13];\n out[14] = a[14];\n out[15] = a[15];\n return out;\n}\n\n/**\n * Create a new mat4 with the given values\n *\n * @param {Number} m00 Component in column 0, row 0 position (index 0)\n * @param {Number} m01 Component in column 0, row 1 position (index 1)\n * @param {Number} m02 Component in column 0, row 2 position (index 2)\n * @param {Number} m03 Component in column 0, row 3 position (index 3)\n * @param {Number} m10 Component in column 1, row 0 position (index 4)\n * @param {Number} m11 Component in column 1, row 1 position (index 5)\n * @param {Number} m12 Component in column 1, row 2 position (index 6)\n * @param {Number} m13 Component in column 1, row 3 position (index 7)\n * @param {Number} m20 Component in column 2, row 0 position (index 8)\n * @param {Number} m21 Component in column 2, row 1 position (index 9)\n * @param {Number} m22 Component in column 2, row 2 position (index 10)\n * @param {Number} m23 Component in column 2, row 3 position (index 11)\n * @param {Number} m30 Component in column 3, row 0 position (index 12)\n * @param {Number} m31 Component in column 3, row 1 position (index 13)\n * @param {Number} m32 Component in column 3, row 2 position (index 14)\n * @param {Number} m33 Component in column 3, row 3 position (index 15)\n * @returns {mat4} A new mat4\n */\nexport function fromValues(m00, m01, m02, m03, m10, m11, m12, m13, m20, m21, m22, m23, m30, m31, m32, m33) {\n var out = new glMatrix.ARRAY_TYPE(16);\n out[0] = m00;\n out[1] = m01;\n out[2] = m02;\n out[3] = m03;\n out[4] = m10;\n out[5] = m11;\n out[6] = m12;\n out[7] = m13;\n out[8] = m20;\n out[9] = m21;\n out[10] = m22;\n out[11] = m23;\n out[12] = m30;\n out[13] = m31;\n out[14] = m32;\n out[15] = m33;\n return out;\n}\n\n/**\n * Set the components of a mat4 to the given values\n *\n * @param {mat4} out the receiving matrix\n * @param {Number} m00 Component in column 0, row 0 position (index 0)\n * @param {Number} m01 Component in column 0, row 1 position (index 1)\n * @param {Number} m02 Component in column 0, row 2 position (index 2)\n * @param {Number} m03 Component in column 0, row 3 position (index 3)\n * @param {Number} m10 Component in column 1, row 0 position (index 4)\n * @param {Number} m11 Component in column 1, row 1 position (index 5)\n * @param {Number} m12 Component in column 1, row 2 position (index 6)\n * @param {Number} m13 Component in column 1, row 3 position (index 7)\n * @param {Number} m20 Component in column 2, row 0 position (index 8)\n * @param {Number} m21 Component in column 2, row 1 position (index 9)\n * @param {Number} m22 Component in column 2, row 2 position (index 10)\n * @param {Number} m23 Component in column 2, row 3 position (index 11)\n * @param {Number} m30 Component in column 3, row 0 position (index 12)\n * @param {Number} m31 Component in column 3, row 1 position (index 13)\n * @param {Number} m32 Component in column 3, row 2 position (index 14)\n * @param {Number} m33 Component in column 3, row 3 position (index 15)\n * @returns {mat4} out\n */\nexport function set(out, m00, m01, m02, m03, m10, m11, m12, m13, m20, m21, m22, m23, m30, m31, m32, m33) {\n out[0] = m00;\n out[1] = m01;\n out[2] = m02;\n out[3] = m03;\n out[4] = m10;\n out[5] = m11;\n out[6] = m12;\n out[7] = m13;\n out[8] = m20;\n out[9] = m21;\n out[10] = m22;\n out[11] = m23;\n out[12] = m30;\n out[13] = m31;\n out[14] = m32;\n out[15] = m33;\n return out;\n}\n\n/**\n * Set a mat4 to the identity matrix\n *\n * @param {mat4} out the receiving matrix\n * @returns {mat4} out\n */\nexport function identity(out) {\n out[0] = 1;\n out[1] = 0;\n out[2] = 0;\n out[3] = 0;\n out[4] = 0;\n out[5] = 1;\n out[6] = 0;\n out[7] = 0;\n out[8] = 0;\n out[9] = 0;\n out[10] = 1;\n out[11] = 0;\n out[12] = 0;\n out[13] = 0;\n out[14] = 0;\n out[15] = 1;\n return out;\n}\n\n/**\n * Transpose the values of a mat4\n *\n * @param {mat4} out the receiving matrix\n * @param {ReadonlyMat4} a the source matrix\n * @returns {mat4} out\n */\nexport function transpose(out, a) {\n // If we are transposing ourselves we can skip a few steps but have to cache some values\n if (out === a) {\n var a01 = a[1],\n a02 = a[2],\n a03 = a[3];\n var a12 = a[6],\n a13 = a[7];\n var a23 = a[11];\n out[1] = a[4];\n out[2] = a[8];\n out[3] = a[12];\n out[4] = a01;\n out[6] = a[9];\n out[7] = a[13];\n out[8] = a02;\n out[9] = a12;\n out[11] = a[14];\n out[12] = a03;\n out[13] = a13;\n out[14] = a23;\n } else {\n out[0] = a[0];\n out[1] = a[4];\n out[2] = a[8];\n out[3] = a[12];\n out[4] = a[1];\n out[5] = a[5];\n out[6] = a[9];\n out[7] = a[13];\n out[8] = a[2];\n out[9] = a[6];\n out[10] = a[10];\n out[11] = a[14];\n out[12] = a[3];\n out[13] = a[7];\n out[14] = a[11];\n out[15] = a[15];\n }\n return out;\n}\n\n/**\n * Inverts a mat4\n *\n * @param {mat4} out the receiving matrix\n * @param {ReadonlyMat4} a the source matrix\n * @returns {mat4 | null} out, or null if source matrix is not invertible\n */\nexport function invert(out, a) {\n var a00 = a[0],\n a01 = a[1],\n a02 = a[2],\n a03 = a[3];\n var a10 = a[4],\n a11 = a[5],\n a12 = a[6],\n a13 = a[7];\n var a20 = a[8],\n a21 = a[9],\n a22 = a[10],\n a23 = a[11];\n var a30 = a[12],\n a31 = a[13],\n a32 = a[14],\n a33 = a[15];\n var b00 = a00 * a11 - a01 * a10;\n var b01 = a00 * a12 - a02 * a10;\n var b02 = a00 * a13 - a03 * a10;\n var b03 = a01 * a12 - a02 * a11;\n var b04 = a01 * a13 - a03 * a11;\n var b05 = a02 * a13 - a03 * a12;\n var b06 = a20 * a31 - a21 * a30;\n var b07 = a20 * a32 - a22 * a30;\n var b08 = a20 * a33 - a23 * a30;\n var b09 = a21 * a32 - a22 * a31;\n var b10 = a21 * a33 - a23 * a31;\n var b11 = a22 * a33 - a23 * a32;\n\n // Calculate the determinant\n var det = b00 * b11 - b01 * b10 + b02 * b09 + b03 * b08 - b04 * b07 + b05 * b06;\n if (!det) {\n return null;\n }\n det = 1.0 / det;\n out[0] = (a11 * b11 - a12 * b10 + a13 * b09) * det;\n out[1] = (a02 * b10 - a01 * b11 - a03 * b09) * det;\n out[2] = (a31 * b05 - a32 * b04 + a33 * b03) * det;\n out[3] = (a22 * b04 - a21 * b05 - a23 * b03) * det;\n out[4] = (a12 * b08 - a10 * b11 - a13 * b07) * det;\n out[5] = (a00 * b11 - a02 * b08 + a03 * b07) * det;\n out[6] = (a32 * b02 - a30 * b05 - a33 * b01) * det;\n out[7] = (a20 * b05 - a22 * b02 + a23 * b01) * det;\n out[8] = (a10 * b10 - a11 * b08 + a13 * b06) * det;\n out[9] = (a01 * b08 - a00 * b10 - a03 * b06) * det;\n out[10] = (a30 * b04 - a31 * b02 + a33 * b00) * det;\n out[11] = (a21 * b02 - a20 * b04 - a23 * b00) * det;\n out[12] = (a11 * b07 - a10 * b09 - a12 * b06) * det;\n out[13] = (a00 * b09 - a01 * b07 + a02 * b06) * det;\n out[14] = (a31 * b01 - a30 * b03 - a32 * b00) * det;\n out[15] = (a20 * b03 - a21 * b01 + a22 * b00) * det;\n return out;\n}\n\n/**\n * Calculates the adjugate of a mat4\n *\n * @param {mat4} out the receiving matrix\n * @param {ReadonlyMat4} a the source matrix\n * @returns {mat4} out\n */\nexport function adjoint(out, a) {\n var a00 = a[0],\n a01 = a[1],\n a02 = a[2],\n a03 = a[3];\n var a10 = a[4],\n a11 = a[5],\n a12 = a[6],\n a13 = a[7];\n var a20 = a[8],\n a21 = a[9],\n a22 = a[10],\n a23 = a[11];\n var a30 = a[12],\n a31 = a[13],\n a32 = a[14],\n a33 = a[15];\n var b00 = a00 * a11 - a01 * a10;\n var b01 = a00 * a12 - a02 * a10;\n var b02 = a00 * a13 - a03 * a10;\n var b03 = a01 * a12 - a02 * a11;\n var b04 = a01 * a13 - a03 * a11;\n var b05 = a02 * a13 - a03 * a12;\n var b06 = a20 * a31 - a21 * a30;\n var b07 = a20 * a32 - a22 * a30;\n var b08 = a20 * a33 - a23 * a30;\n var b09 = a21 * a32 - a22 * a31;\n var b10 = a21 * a33 - a23 * a31;\n var b11 = a22 * a33 - a23 * a32;\n out[0] = a11 * b11 - a12 * b10 + a13 * b09;\n out[1] = a02 * b10 - a01 * b11 - a03 * b09;\n out[2] = a31 * b05 - a32 * b04 + a33 * b03;\n out[3] = a22 * b04 - a21 * b05 - a23 * b03;\n out[4] = a12 * b08 - a10 * b11 - a13 * b07;\n out[5] = a00 * b11 - a02 * b08 + a03 * b07;\n out[6] = a32 * b02 - a30 * b05 - a33 * b01;\n out[7] = a20 * b05 - a22 * b02 + a23 * b01;\n out[8] = a10 * b10 - a11 * b08 + a13 * b06;\n out[9] = a01 * b08 - a00 * b10 - a03 * b06;\n out[10] = a30 * b04 - a31 * b02 + a33 * b00;\n out[11] = a21 * b02 - a20 * b04 - a23 * b00;\n out[12] = a11 * b07 - a10 * b09 - a12 * b06;\n out[13] = a00 * b09 - a01 * b07 + a02 * b06;\n out[14] = a31 * b01 - a30 * b03 - a32 * b00;\n out[15] = a20 * b03 - a21 * b01 + a22 * b00;\n return out;\n}\n\n/**\n * Calculates the determinant of a mat4\n *\n * @param {ReadonlyMat4} a the source matrix\n * @returns {Number} determinant of a\n */\nexport function determinant(a) {\n var a00 = a[0],\n a01 = a[1],\n a02 = a[2],\n a03 = a[3];\n var a10 = a[4],\n a11 = a[5],\n a12 = a[6],\n a13 = a[7];\n var a20 = a[8],\n a21 = a[9],\n a22 = a[10],\n a23 = a[11];\n var a30 = a[12],\n a31 = a[13],\n a32 = a[14],\n a33 = a[15];\n var b0 = a00 * a11 - a01 * a10;\n var b1 = a00 * a12 - a02 * a10;\n var b2 = a01 * a12 - a02 * a11;\n var b3 = a20 * a31 - a21 * a30;\n var b4 = a20 * a32 - a22 * a30;\n var b5 = a21 * a32 - a22 * a31;\n var b6 = a00 * b5 - a01 * b4 + a02 * b3;\n var b7 = a10 * b5 - a11 * b4 + a12 * b3;\n var b8 = a20 * b2 - a21 * b1 + a22 * b0;\n var b9 = a30 * b2 - a31 * b1 + a32 * b0;\n\n // Calculate the determinant\n return a13 * b6 - a03 * b7 + a33 * b8 - a23 * b9;\n}\n\n/**\n * Multiplies two mat4s\n *\n * @param {mat4} out the receiving matrix\n * @param {ReadonlyMat4} a the first operand\n * @param {ReadonlyMat4} b the second operand\n * @returns {mat4} out\n */\nexport function multiply(out, a, b) {\n var a00 = a[0],\n a01 = a[1],\n a02 = a[2],\n a03 = a[3];\n var a10 = a[4],\n a11 = a[5],\n a12 = a[6],\n a13 = a[7];\n var a20 = a[8],\n a21 = a[9],\n a22 = a[10],\n a23 = a[11];\n var a30 = a[12],\n a31 = a[13],\n a32 = a[14],\n a33 = a[15];\n\n // Cache only the current line of the second matrix\n var b0 = b[0],\n b1 = b[1],\n b2 = b[2],\n b3 = b[3];\n out[0] = b0 * a00 + b1 * a10 + b2 * a20 + b3 * a30;\n out[1] = b0 * a01 + b1 * a11 + b2 * a21 + b3 * a31;\n out[2] = b0 * a02 + b1 * a12 + b2 * a22 + b3 * a32;\n out[3] = b0 * a03 + b1 * a13 + b2 * a23 + b3 * a33;\n b0 = b[4];\n b1 = b[5];\n b2 = b[6];\n b3 = b[7];\n out[4] = b0 * a00 + b1 * a10 + b2 * a20 + b3 * a30;\n out[5] = b0 * a01 + b1 * a11 + b2 * a21 + b3 * a31;\n out[6] = b0 * a02 + b1 * a12 + b2 * a22 + b3 * a32;\n out[7] = b0 * a03 + b1 * a13 + b2 * a23 + b3 * a33;\n b0 = b[8];\n b1 = b[9];\n b2 = b[10];\n b3 = b[11];\n out[8] = b0 * a00 + b1 * a10 + b2 * a20 + b3 * a30;\n out[9] = b0 * a01 + b1 * a11 + b2 * a21 + b3 * a31;\n out[10] = b0 * a02 + b1 * a12 + b2 * a22 + b3 * a32;\n out[11] = b0 * a03 + b1 * a13 + b2 * a23 + b3 * a33;\n b0 = b[12];\n b1 = b[13];\n b2 = b[14];\n b3 = b[15];\n out[12] = b0 * a00 + b1 * a10 + b2 * a20 + b3 * a30;\n out[13] = b0 * a01 + b1 * a11 + b2 * a21 + b3 * a31;\n out[14] = b0 * a02 + b1 * a12 + b2 * a22 + b3 * a32;\n out[15] = b0 * a03 + b1 * a13 + b2 * a23 + b3 * a33;\n return out;\n}\n\n/**\n * Translate a mat4 by the given vector\n *\n * @param {mat4} out the receiving matrix\n * @param {ReadonlyMat4} a the matrix to translate\n * @param {ReadonlyVec3} v vector to translate by\n * @returns {mat4} out\n */\nexport function translate(out, a, v) {\n var x = v[0],\n y = v[1],\n z = v[2];\n var a00, a01, a02, a03;\n var a10, a11, a12, a13;\n var a20, a21, a22, a23;\n if (a === out) {\n out[12] = a[0] * x + a[4] * y + a[8] * z + a[12];\n out[13] = a[1] * x + a[5] * y + a[9] * z + a[13];\n out[14] = a[2] * x + a[6] * y + a[10] * z + a[14];\n out[15] = a[3] * x + a[7] * y + a[11] * z + a[15];\n } else {\n a00 = a[0];\n a01 = a[1];\n a02 = a[2];\n a03 = a[3];\n a10 = a[4];\n a11 = a[5];\n a12 = a[6];\n a13 = a[7];\n a20 = a[8];\n a21 = a[9];\n a22 = a[10];\n a23 = a[11];\n out[0] = a00;\n out[1] = a01;\n out[2] = a02;\n out[3] = a03;\n out[4] = a10;\n out[5] = a11;\n out[6] = a12;\n out[7] = a13;\n out[8] = a20;\n out[9] = a21;\n out[10] = a22;\n out[11] = a23;\n out[12] = a00 * x + a10 * y + a20 * z + a[12];\n out[13] = a01 * x + a11 * y + a21 * z + a[13];\n out[14] = a02 * x + a12 * y + a22 * z + a[14];\n out[15] = a03 * x + a13 * y + a23 * z + a[15];\n }\n return out;\n}\n\n/**\n * Scales the mat4 by the dimensions in the given vec3 not using vectorization\n *\n * @param {mat4} out the receiving matrix\n * @param {ReadonlyMat4} a the matrix to scale\n * @param {ReadonlyVec3} v the vec3 to scale the matrix by\n * @returns {mat4} out\n **/\nexport function scale(out, a, v) {\n var x = v[0],\n y = v[1],\n z = v[2];\n out[0] = a[0] * x;\n out[1] = a[1] * x;\n out[2] = a[2] * x;\n out[3] = a[3] * x;\n out[4] = a[4] * y;\n out[5] = a[5] * y;\n out[6] = a[6] * y;\n out[7] = a[7] * y;\n out[8] = a[8] * z;\n out[9] = a[9] * z;\n out[10] = a[10] * z;\n out[11] = a[11] * z;\n out[12] = a[12];\n out[13] = a[13];\n out[14] = a[14];\n out[15] = a[15];\n return out;\n}\n\n/**\n * Rotates a mat4 by the given angle around the given axis\n *\n * @param {mat4} out the receiving matrix\n * @param {ReadonlyMat4} a the matrix to rotate\n * @param {Number} rad the angle to rotate the matrix by\n * @param {ReadonlyVec3} axis the axis to rotate around\n * @returns {mat4} out\n */\nexport function rotate(out, a, rad, axis) {\n var x = axis[0],\n y = axis[1],\n z = axis[2];\n var len = Math.sqrt(x * x + y * y + z * z);\n var s, c, t;\n var a00, a01, a02, a03;\n var a10, a11, a12, a13;\n var a20, a21, a22, a23;\n var b00, b01, b02;\n var b10, b11, b12;\n var b20, b21, b22;\n if (len < glMatrix.EPSILON) {\n return null;\n }\n len = 1 / len;\n x *= len;\n y *= len;\n z *= len;\n s = Math.sin(rad);\n c = Math.cos(rad);\n t = 1 - c;\n a00 = a[0];\n a01 = a[1];\n a02 = a[2];\n a03 = a[3];\n a10 = a[4];\n a11 = a[5];\n a12 = a[6];\n a13 = a[7];\n a20 = a[8];\n a21 = a[9];\n a22 = a[10];\n a23 = a[11];\n\n // Construct the elements of the rotation matrix\n b00 = x * x * t + c;\n b01 = y * x * t + z * s;\n b02 = z * x * t - y * s;\n b10 = x * y * t - z * s;\n b11 = y * y * t + c;\n b12 = z * y * t + x * s;\n b20 = x * z * t + y * s;\n b21 = y * z * t - x * s;\n b22 = z * z * t + c;\n\n // Perform rotation-specific matrix multiplication\n out[0] = a00 * b00 + a10 * b01 + a20 * b02;\n out[1] = a01 * b00 + a11 * b01 + a21 * b02;\n out[2] = a02 * b00 + a12 * b01 + a22 * b02;\n out[3] = a03 * b00 + a13 * b01 + a23 * b02;\n out[4] = a00 * b10 + a10 * b11 + a20 * b12;\n out[5] = a01 * b10 + a11 * b11 + a21 * b12;\n out[6] = a02 * b10 + a12 * b11 + a22 * b12;\n out[7] = a03 * b10 + a13 * b11 + a23 * b12;\n out[8] = a00 * b20 + a10 * b21 + a20 * b22;\n out[9] = a01 * b20 + a11 * b21 + a21 * b22;\n out[10] = a02 * b20 + a12 * b21 + a22 * b22;\n out[11] = a03 * b20 + a13 * b21 + a23 * b22;\n if (a !== out) {\n // If the source and destination differ, copy the unchanged last row\n out[12] = a[12];\n out[13] = a[13];\n out[14] = a[14];\n out[15] = a[15];\n }\n return out;\n}\n\n/**\n * Rotates a matrix by the given angle around the X axis\n *\n * @param {mat4} out the receiving matrix\n * @param {ReadonlyMat4} a the matrix to rotate\n * @param {Number} rad the angle to rotate the matrix by\n * @returns {mat4} out\n */\nexport function rotateX(out, a, rad) {\n var s = Math.sin(rad);\n var c = Math.cos(rad);\n var a10 = a[4];\n var a11 = a[5];\n var a12 = a[6];\n var a13 = a[7];\n var a20 = a[8];\n var a21 = a[9];\n var a22 = a[10];\n var a23 = a[11];\n if (a !== out) {\n // If the source and destination differ, copy the unchanged rows\n out[0] = a[0];\n out[1] = a[1];\n out[2] = a[2];\n out[3] = a[3];\n out[12] = a[12];\n out[13] = a[13];\n out[14] = a[14];\n out[15] = a[15];\n }\n\n // Perform axis-specific matrix multiplication\n out[4] = a10 * c + a20 * s;\n out[5] = a11 * c + a21 * s;\n out[6] = a12 * c + a22 * s;\n out[7] = a13 * c + a23 * s;\n out[8] = a20 * c - a10 * s;\n out[9] = a21 * c - a11 * s;\n out[10] = a22 * c - a12 * s;\n out[11] = a23 * c - a13 * s;\n return out;\n}\n\n/**\n * Rotates a matrix by the given angle around the Y axis\n *\n * @param {mat4} out the receiving matrix\n * @param {ReadonlyMat4} a the matrix to rotate\n * @param {Number} rad the angle to rotate the matrix by\n * @returns {mat4} out\n */\nexport function rotateY(out, a, rad) {\n var s = Math.sin(rad);\n var c = Math.cos(rad);\n var a00 = a[0];\n var a01 = a[1];\n var a02 = a[2];\n var a03 = a[3];\n var a20 = a[8];\n var a21 = a[9];\n var a22 = a[10];\n var a23 = a[11];\n if (a !== out) {\n // If the source and destination differ, copy the unchanged rows\n out[4] = a[4];\n out[5] = a[5];\n out[6] = a[6];\n out[7] = a[7];\n out[12] = a[12];\n out[13] = a[13];\n out[14] = a[14];\n out[15] = a[15];\n }\n\n // Perform axis-specific matrix multiplication\n out[0] = a00 * c - a20 * s;\n out[1] = a01 * c - a21 * s;\n out[2] = a02 * c - a22 * s;\n out[3] = a03 * c - a23 * s;\n out[8] = a00 * s + a20 * c;\n out[9] = a01 * s + a21 * c;\n out[10] = a02 * s + a22 * c;\n out[11] = a03 * s + a23 * c;\n return out;\n}\n\n/**\n * Rotates a matrix by the given angle around the Z axis\n *\n * @param {mat4} out the receiving matrix\n * @param {ReadonlyMat4} a the matrix to rotate\n * @param {Number} rad the angle to rotate the matrix by\n * @returns {mat4} out\n */\nexport function rotateZ(out, a, rad) {\n var s = Math.sin(rad);\n var c = Math.cos(rad);\n var a00 = a[0];\n var a01 = a[1];\n var a02 = a[2];\n var a03 = a[3];\n var a10 = a[4];\n var a11 = a[5];\n var a12 = a[6];\n var a13 = a[7];\n if (a !== out) {\n // If the source and destination differ, copy the unchanged last row\n out[8] = a[8];\n out[9] = a[9];\n out[10] = a[10];\n out[11] = a[11];\n out[12] = a[12];\n out[13] = a[13];\n out[14] = a[14];\n out[15] = a[15];\n }\n\n // Perform axis-specific matrix multiplication\n out[0] = a00 * c + a10 * s;\n out[1] = a01 * c + a11 * s;\n out[2] = a02 * c + a12 * s;\n out[3] = a03 * c + a13 * s;\n out[4] = a10 * c - a00 * s;\n out[5] = a11 * c - a01 * s;\n out[6] = a12 * c - a02 * s;\n out[7] = a13 * c - a03 * s;\n return out;\n}\n\n/**\n * Creates a matrix from a vector translation\n * This is equivalent to (but much faster than):\n *\n * mat4.identity(dest);\n * mat4.translate(dest, dest, vec);\n *\n * @param {mat4} out mat4 receiving operation result\n * @param {ReadonlyVec3} v Translation vector\n * @returns {mat4} out\n */\nexport function fromTranslation(out, v) {\n out[0] = 1;\n out[1] = 0;\n out[2] = 0;\n out[3] = 0;\n out[4] = 0;\n out[5] = 1;\n out[6] = 0;\n out[7] = 0;\n out[8] = 0;\n out[9] = 0;\n out[10] = 1;\n out[11] = 0;\n out[12] = v[0];\n out[13] = v[1];\n out[14] = v[2];\n out[15] = 1;\n return out;\n}\n\n/**\n * Creates a matrix from a vector scaling\n * This is equivalent to (but much faster than):\n *\n * mat4.identity(dest);\n * mat4.scale(dest, dest, vec);\n *\n * @param {mat4} out mat4 receiving operation result\n * @param {ReadonlyVec3} v Scaling vector\n * @returns {mat4} out\n */\nexport function fromScaling(out, v) {\n out[0] = v[0];\n out[1] = 0;\n out[2] = 0;\n out[3] = 0;\n out[4] = 0;\n out[5] = v[1];\n out[6] = 0;\n out[7] = 0;\n out[8] = 0;\n out[9] = 0;\n out[10] = v[2];\n out[11] = 0;\n out[12] = 0;\n out[13] = 0;\n out[14] = 0;\n out[15] = 1;\n return out;\n}\n\n/**\n * Creates a matrix from a given angle around a given axis\n * This is equivalent to (but much faster than):\n *\n * mat4.identity(dest);\n * mat4.rotate(dest, dest, rad, axis);\n *\n * @param {mat4} out mat4 receiving operation result\n * @param {Number} rad the angle to rotate the matrix by\n * @param {ReadonlyVec3} axis the axis to rotate around\n * @returns {mat4} out\n */\nexport function fromRotation(out, rad, axis) {\n var x = axis[0],\n y = axis[1],\n z = axis[2];\n var len = Math.sqrt(x * x + y * y + z * z);\n var s, c, t;\n if (len < glMatrix.EPSILON) {\n return null;\n }\n len = 1 / len;\n x *= len;\n y *= len;\n z *= len;\n s = Math.sin(rad);\n c = Math.cos(rad);\n t = 1 - c;\n\n // Perform rotation-specific matrix multiplication\n out[0] = x * x * t + c;\n out[1] = y * x * t + z * s;\n out[2] = z * x * t - y * s;\n out[3] = 0;\n out[4] = x * y * t - z * s;\n out[5] = y * y * t + c;\n out[6] = z * y * t + x * s;\n out[7] = 0;\n out[8] = x * z * t + y * s;\n out[9] = y * z * t - x * s;\n out[10] = z * z * t + c;\n out[11] = 0;\n out[12] = 0;\n out[13] = 0;\n out[14] = 0;\n out[15] = 1;\n return out;\n}\n\n/**\n * Creates a matrix from the given angle around the X axis\n * This is equivalent to (but much faster than):\n *\n * mat4.identity(dest);\n * mat4.rotateX(dest, dest, rad);\n *\n * @param {mat4} out mat4 receiving operation result\n * @param {Number} rad the angle to rotate the matrix by\n * @returns {mat4} out\n */\nexport function fromXRotation(out, rad) {\n var s = Math.sin(rad);\n var c = Math.cos(rad);\n\n // Perform axis-specific matrix multiplication\n out[0] = 1;\n out[1] = 0;\n out[2] = 0;\n out[3] = 0;\n out[4] = 0;\n out[5] = c;\n out[6] = s;\n out[7] = 0;\n out[8] = 0;\n out[9] = -s;\n out[10] = c;\n out[11] = 0;\n out[12] = 0;\n out[13] = 0;\n out[14] = 0;\n out[15] = 1;\n return out;\n}\n\n/**\n * Creates a matrix from the given angle around the Y axis\n * This is equivalent to (but much faster than):\n *\n * mat4.identity(dest);\n * mat4.rotateY(dest, dest, rad);\n *\n * @param {mat4} out mat4 receiving operation result\n * @param {Number} rad the angle to rotate the matrix by\n * @returns {mat4} out\n */\nexport function fromYRotation(out, rad) {\n var s = Math.sin(rad);\n var c = Math.cos(rad);\n\n // Perform axis-specific matrix multiplication\n out[0] = c;\n out[1] = 0;\n out[2] = -s;\n out[3] = 0;\n out[4] = 0;\n out[5] = 1;\n out[6] = 0;\n out[7] = 0;\n out[8] = s;\n out[9] = 0;\n out[10] = c;\n out[11] = 0;\n out[12] = 0;\n out[13] = 0;\n out[14] = 0;\n out[15] = 1;\n return out;\n}\n\n/**\n * Creates a matrix from the given angle around the Z axis\n * This is equivalent to (but much faster than):\n *\n * mat4.identity(dest);\n * mat4.rotateZ(dest, dest, rad);\n *\n * @param {mat4} out mat4 receiving operation result\n * @param {Number} rad the angle to rotate the matrix by\n * @returns {mat4} out\n */\nexport function fromZRotation(out, rad) {\n var s = Math.sin(rad);\n var c = Math.cos(rad);\n\n // Perform axis-specific matrix multiplication\n out[0] = c;\n out[1] = s;\n out[2] = 0;\n out[3] = 0;\n out[4] = -s;\n out[5] = c;\n out[6] = 0;\n out[7] = 0;\n out[8] = 0;\n out[9] = 0;\n out[10] = 1;\n out[11] = 0;\n out[12] = 0;\n out[13] = 0;\n out[14] = 0;\n out[15] = 1;\n return out;\n}\n\n/**\n * Creates a matrix from a quaternion rotation and vector translation\n * This is equivalent to (but much faster than):\n *\n * mat4.identity(dest);\n * mat4.translate(dest, dest, vec);\n * let quatMat = mat4.create();\n * mat4.fromQuat(quatMat, quat);\n * mat4.multiply(dest, dest, quatMat);\n *\n * @param {mat4} out mat4 receiving operation result\n * @param {quat} q Rotation quaternion\n * @param {ReadonlyVec3} v Translation vector\n * @returns {mat4} out\n */\nexport function fromRotationTranslation(out, q, v) {\n // Quaternion math\n var x = q[0],\n y = q[1],\n z = q[2],\n w = q[3];\n var x2 = x + x;\n var y2 = y + y;\n var z2 = z + z;\n var xx = x * x2;\n var xy = x * y2;\n var xz = x * z2;\n var yy = y * y2;\n var yz = y * z2;\n var zz = z * z2;\n var wx = w * x2;\n var wy = w * y2;\n var wz = w * z2;\n out[0] = 1 - (yy + zz);\n out[1] = xy + wz;\n out[2] = xz - wy;\n out[3] = 0;\n out[4] = xy - wz;\n out[5] = 1 - (xx + zz);\n out[6] = yz + wx;\n out[7] = 0;\n out[8] = xz + wy;\n out[9] = yz - wx;\n out[10] = 1 - (xx + yy);\n out[11] = 0;\n out[12] = v[0];\n out[13] = v[1];\n out[14] = v[2];\n out[15] = 1;\n return out;\n}\n\n/**\n * Creates a new mat4 from a dual quat.\n *\n * @param {mat4} out Matrix\n * @param {ReadonlyQuat2} a Dual Quaternion\n * @returns {mat4} mat4 receiving operation result\n */\nexport function fromQuat2(out, a) {\n var translation = new glMatrix.ARRAY_TYPE(3);\n var bx = -a[0],\n by = -a[1],\n bz = -a[2],\n bw = a[3],\n ax = a[4],\n ay = a[5],\n az = a[6],\n aw = a[7];\n var magnitude = bx * bx + by * by + bz * bz + bw * bw;\n //Only scale if it makes sense\n if (magnitude > 0) {\n translation[0] = (ax * bw + aw * bx + ay * bz - az * by) * 2 / magnitude;\n translation[1] = (ay * bw + aw * by + az * bx - ax * bz) * 2 / magnitude;\n translation[2] = (az * bw + aw * bz + ax * by - ay * bx) * 2 / magnitude;\n } else {\n translation[0] = (ax * bw + aw * bx + ay * bz - az * by) * 2;\n translation[1] = (ay * bw + aw * by + az * bx - ax * bz) * 2;\n translation[2] = (az * bw + aw * bz + ax * by - ay * bx) * 2;\n }\n fromRotationTranslation(out, a, translation);\n return out;\n}\n\n/**\n * Returns the translation vector component of a transformation\n * matrix. If a matrix is built with fromRotationTranslation,\n * the returned vector will be the same as the translation vector\n * originally supplied.\n * @param {vec3} out Vector to receive translation component\n * @param {ReadonlyMat4} mat Matrix to be decomposed (input)\n * @return {vec3} out\n */\nexport function getTranslation(out, mat) {\n out[0] = mat[12];\n out[1] = mat[13];\n out[2] = mat[14];\n return out;\n}\n\n/**\n * Returns the scaling factor component of a transformation\n * matrix. If a matrix is built with fromRotationTranslationScale\n * with a normalized Quaternion parameter, the returned vector will be\n * the same as the scaling vector\n * originally supplied.\n * @param {vec3} out Vector to receive scaling factor component\n * @param {ReadonlyMat4} mat Matrix to be decomposed (input)\n * @return {vec3} out\n */\nexport function getScaling(out, mat) {\n var m11 = mat[0];\n var m12 = mat[1];\n var m13 = mat[2];\n var m21 = mat[4];\n var m22 = mat[5];\n var m23 = mat[6];\n var m31 = mat[8];\n var m32 = mat[9];\n var m33 = mat[10];\n out[0] = Math.sqrt(m11 * m11 + m12 * m12 + m13 * m13);\n out[1] = Math.sqrt(m21 * m21 + m22 * m22 + m23 * m23);\n out[2] = Math.sqrt(m31 * m31 + m32 * m32 + m33 * m33);\n return out;\n}\n\n/**\n * Returns a quaternion representing the rotational component\n * of a transformation matrix. If a matrix is built with\n * fromRotationTranslation, the returned quaternion will be the\n * same as the quaternion originally supplied.\n * @param {quat} out Quaternion to receive the rotation component\n * @param {ReadonlyMat4} mat Matrix to be decomposed (input)\n * @return {quat} out\n */\nexport function getRotation(out, mat) {\n var scaling = new glMatrix.ARRAY_TYPE(3);\n getScaling(scaling, mat);\n var is1 = 1 / scaling[0];\n var is2 = 1 / scaling[1];\n var is3 = 1 / scaling[2];\n var sm11 = mat[0] * is1;\n var sm12 = mat[1] * is2;\n var sm13 = mat[2] * is3;\n var sm21 = mat[4] * is1;\n var sm22 = mat[5] * is2;\n var sm23 = mat[6] * is3;\n var sm31 = mat[8] * is1;\n var sm32 = mat[9] * is2;\n var sm33 = mat[10] * is3;\n var trace = sm11 + sm22 + sm33;\n var S = 0;\n if (trace > 0) {\n S = Math.sqrt(trace + 1.0) * 2;\n out[3] = 0.25 * S;\n out[0] = (sm23 - sm32) / S;\n out[1] = (sm31 - sm13) / S;\n out[2] = (sm12 - sm21) / S;\n } else if (sm11 > sm22 && sm11 > sm33) {\n S = Math.sqrt(1.0 + sm11 - sm22 - sm33) * 2;\n out[3] = (sm23 - sm32) / S;\n out[0] = 0.25 * S;\n out[1] = (sm12 + sm21) / S;\n out[2] = (sm31 + sm13) / S;\n } else if (sm22 > sm33) {\n S = Math.sqrt(1.0 + sm22 - sm11 - sm33) * 2;\n out[3] = (sm31 - sm13) / S;\n out[0] = (sm12 + sm21) / S;\n out[1] = 0.25 * S;\n out[2] = (sm23 + sm32) / S;\n } else {\n S = Math.sqrt(1.0 + sm33 - sm11 - sm22) * 2;\n out[3] = (sm12 - sm21) / S;\n out[0] = (sm31 + sm13) / S;\n out[1] = (sm23 + sm32) / S;\n out[2] = 0.25 * S;\n }\n return out;\n}\n\n/**\n * Decomposes a transformation matrix into its rotation, translation\n * and scale components. Returns only the rotation component\n * @param {quat} out_r Quaternion to receive the rotation component\n * @param {vec3} out_t Vector to receive the translation vector\n * @param {vec3} out_s Vector to receive the scaling factor\n * @param {ReadonlyMat4} mat Matrix to be decomposed (input)\n * @returns {quat} out_r\n */\nexport function decompose(out_r, out_t, out_s, mat) {\n out_t[0] = mat[12];\n out_t[1] = mat[13];\n out_t[2] = mat[14];\n var m11 = mat[0];\n var m12 = mat[1];\n var m13 = mat[2];\n var m21 = mat[4];\n var m22 = mat[5];\n var m23 = mat[6];\n var m31 = mat[8];\n var m32 = mat[9];\n var m33 = mat[10];\n out_s[0] = Math.sqrt(m11 * m11 + m12 * m12 + m13 * m13);\n out_s[1] = Math.sqrt(m21 * m21 + m22 * m22 + m23 * m23);\n out_s[2] = Math.sqrt(m31 * m31 + m32 * m32 + m33 * m33);\n var is1 = 1 / out_s[0];\n var is2 = 1 / out_s[1];\n var is3 = 1 / out_s[2];\n var sm11 = m11 * is1;\n var sm12 = m12 * is2;\n var sm13 = m13 * is3;\n var sm21 = m21 * is1;\n var sm22 = m22 * is2;\n var sm23 = m23 * is3;\n var sm31 = m31 * is1;\n var sm32 = m32 * is2;\n var sm33 = m33 * is3;\n var trace = sm11 + sm22 + sm33;\n var S = 0;\n if (trace > 0) {\n S = Math.sqrt(trace + 1.0) * 2;\n out_r[3] = 0.25 * S;\n out_r[0] = (sm23 - sm32) / S;\n out_r[1] = (sm31 - sm13) / S;\n out_r[2] = (sm12 - sm21) / S;\n } else if (sm11 > sm22 && sm11 > sm33) {\n S = Math.sqrt(1.0 + sm11 - sm22 - sm33) * 2;\n out_r[3] = (sm23 - sm32) / S;\n out_r[0] = 0.25 * S;\n out_r[1] = (sm12 + sm21) / S;\n out_r[2] = (sm31 + sm13) / S;\n } else if (sm22 > sm33) {\n S = Math.sqrt(1.0 + sm22 - sm11 - sm33) * 2;\n out_r[3] = (sm31 - sm13) / S;\n out_r[0] = (sm12 + sm21) / S;\n out_r[1] = 0.25 * S;\n out_r[2] = (sm23 + sm32) / S;\n } else {\n S = Math.sqrt(1.0 + sm33 - sm11 - sm22) * 2;\n out_r[3] = (sm12 - sm21) / S;\n out_r[0] = (sm31 + sm13) / S;\n out_r[1] = (sm23 + sm32) / S;\n out_r[2] = 0.25 * S;\n }\n return out_r;\n}\n\n/**\n * Creates a matrix from a quaternion rotation, vector translation and vector scale\n * This is equivalent to (but much faster than):\n *\n * mat4.identity(dest);\n * mat4.translate(dest, dest, vec);\n * let quatMat = mat4.create();\n * mat4.fromQuat(quatMat, quat);\n * mat4.multiply(dest, dest, quatMat);\n * mat4.scale(dest, dest, scale)\n *\n * @param {mat4} out mat4 receiving operation result\n * @param {quat} q Rotation quaternion\n * @param {ReadonlyVec3} v Translation vector\n * @param {ReadonlyVec3} s Scaling vector\n * @returns {mat4} out\n */\nexport function fromRotationTranslationScale(out, q, v, s) {\n // Quaternion math\n var x = q[0],\n y = q[1],\n z = q[2],\n w = q[3];\n var x2 = x + x;\n var y2 = y + y;\n var z2 = z + z;\n var xx = x * x2;\n var xy = x * y2;\n var xz = x * z2;\n var yy = y * y2;\n var yz = y * z2;\n var zz = z * z2;\n var wx = w * x2;\n var wy = w * y2;\n var wz = w * z2;\n var sx = s[0];\n var sy = s[1];\n var sz = s[2];\n out[0] = (1 - (yy + zz)) * sx;\n out[1] = (xy + wz) * sx;\n out[2] = (xz - wy) * sx;\n out[3] = 0;\n out[4] = (xy - wz) * sy;\n out[5] = (1 - (xx + zz)) * sy;\n out[6] = (yz + wx) * sy;\n out[7] = 0;\n out[8] = (xz + wy) * sz;\n out[9] = (yz - wx) * sz;\n out[10] = (1 - (xx + yy)) * sz;\n out[11] = 0;\n out[12] = v[0];\n out[13] = v[1];\n out[14] = v[2];\n out[15] = 1;\n return out;\n}\n\n/**\n * Creates a matrix from a quaternion rotation, vector translation and vector scale, rotating and scaling around the given origin\n * This is equivalent to (but much faster than):\n *\n * mat4.identity(dest);\n * mat4.translate(dest, dest, vec);\n * mat4.translate(dest, dest, origin);\n * let quatMat = mat4.create();\n * mat4.fromQuat(quatMat, quat);\n * mat4.multiply(dest, dest, quatMat);\n * mat4.scale(dest, dest, scale)\n * mat4.translate(dest, dest, negativeOrigin);\n *\n * @param {mat4} out mat4 receiving operation result\n * @param {quat} q Rotation quaternion\n * @param {ReadonlyVec3} v Translation vector\n * @param {ReadonlyVec3} s Scaling vector\n * @param {ReadonlyVec3} o The origin vector around which to scale and rotate\n * @returns {mat4} out\n */\nexport function fromRotationTranslationScaleOrigin(out, q, v, s, o) {\n // Quaternion math\n var x = q[0],\n y = q[1],\n z = q[2],\n w = q[3];\n var x2 = x + x;\n var y2 = y + y;\n var z2 = z + z;\n var xx = x * x2;\n var xy = x * y2;\n var xz = x * z2;\n var yy = y * y2;\n var yz = y * z2;\n var zz = z * z2;\n var wx = w * x2;\n var wy = w * y2;\n var wz = w * z2;\n var sx = s[0];\n var sy = s[1];\n var sz = s[2];\n var ox = o[0];\n var oy = o[1];\n var oz = o[2];\n var out0 = (1 - (yy + zz)) * sx;\n var out1 = (xy + wz) * sx;\n var out2 = (xz - wy) * sx;\n var out4 = (xy - wz) * sy;\n var out5 = (1 - (xx + zz)) * sy;\n var out6 = (yz + wx) * sy;\n var out8 = (xz + wy) * sz;\n var out9 = (yz - wx) * sz;\n var out10 = (1 - (xx + yy)) * sz;\n out[0] = out0;\n out[1] = out1;\n out[2] = out2;\n out[3] = 0;\n out[4] = out4;\n out[5] = out5;\n out[6] = out6;\n out[7] = 0;\n out[8] = out8;\n out[9] = out9;\n out[10] = out10;\n out[11] = 0;\n out[12] = v[0] + ox - (out0 * ox + out4 * oy + out8 * oz);\n out[13] = v[1] + oy - (out1 * ox + out5 * oy + out9 * oz);\n out[14] = v[2] + oz - (out2 * ox + out6 * oy + out10 * oz);\n out[15] = 1;\n return out;\n}\n\n/**\n * Calculates a 4x4 matrix from the given quaternion\n *\n * @param {mat4} out mat4 receiving operation result\n * @param {ReadonlyQuat} q Quaternion to create matrix from\n *\n * @returns {mat4} out\n */\nexport function fromQuat(out, q) {\n var x = q[0],\n y = q[1],\n z = q[2],\n w = q[3];\n var x2 = x + x;\n var y2 = y + y;\n var z2 = z + z;\n var xx = x * x2;\n var yx = y * x2;\n var yy = y * y2;\n var zx = z * x2;\n var zy = z * y2;\n var zz = z * z2;\n var wx = w * x2;\n var wy = w * y2;\n var wz = w * z2;\n out[0] = 1 - yy - zz;\n out[1] = yx + wz;\n out[2] = zx - wy;\n out[3] = 0;\n out[4] = yx - wz;\n out[5] = 1 - xx - zz;\n out[6] = zy + wx;\n out[7] = 0;\n out[8] = zx + wy;\n out[9] = zy - wx;\n out[10] = 1 - xx - yy;\n out[11] = 0;\n out[12] = 0;\n out[13] = 0;\n out[14] = 0;\n out[15] = 1;\n return out;\n}\n\n/**\n * Generates a frustum matrix with the given bounds\n *\n * @param {mat4} out mat4 frustum matrix will be written into\n * @param {Number} left Left bound of the frustum\n * @param {Number} right Right bound of the frustum\n * @param {Number} bottom Bottom bound of the frustum\n * @param {Number} top Top bound of the frustum\n * @param {Number} near Near bound of the frustum\n * @param {Number} far Far bound of the frustum\n * @returns {mat4} out\n */\nexport function frustum(out, left, right, bottom, top, near, far) {\n var rl = 1 / (right - left);\n var tb = 1 / (top - bottom);\n var nf = 1 / (near - far);\n out[0] = near * 2 * rl;\n out[1] = 0;\n out[2] = 0;\n out[3] = 0;\n out[4] = 0;\n out[5] = near * 2 * tb;\n out[6] = 0;\n out[7] = 0;\n out[8] = (right + left) * rl;\n out[9] = (top + bottom) * tb;\n out[10] = (far + near) * nf;\n out[11] = -1;\n out[12] = 0;\n out[13] = 0;\n out[14] = far * near * 2 * nf;\n out[15] = 0;\n return out;\n}\n\n/**\n * Generates a perspective projection matrix with the given bounds.\n * The near/far clip planes correspond to a normalized device coordinate Z range of [-1, 1],\n * which matches WebGL/OpenGL's clip volume.\n * Passing null/undefined/no value for far will generate infinite projection matrix.\n *\n * @param {mat4} out mat4 frustum matrix will be written into\n * @param {number} fovy Vertical field of view in radians\n * @param {number} aspect Aspect ratio. typically viewport width/height\n * @param {number} near Near bound of the frustum\n * @param {number} far Far bound of the frustum, can be null or Infinity\n * @returns {mat4} out\n */\nexport function perspectiveNO(out, fovy, aspect, near, far) {\n var f = 1.0 / Math.tan(fovy / 2);\n out[0] = f / aspect;\n out[1] = 0;\n out[2] = 0;\n out[3] = 0;\n out[4] = 0;\n out[5] = f;\n out[6] = 0;\n out[7] = 0;\n out[8] = 0;\n out[9] = 0;\n out[11] = -1;\n out[12] = 0;\n out[13] = 0;\n out[15] = 0;\n if (far != null && far !== Infinity) {\n var nf = 1 / (near - far);\n out[10] = (far + near) * nf;\n out[14] = 2 * far * near * nf;\n } else {\n out[10] = -1;\n out[14] = -2 * near;\n }\n return out;\n}\n\n/**\n * Alias for {@link mat4.perspectiveNO}\n * @function\n */\nexport var perspective = perspectiveNO;\n\n/**\n * Generates a perspective projection matrix suitable for WebGPU with the given bounds.\n * The near/far clip planes correspond to a normalized device coordinate Z range of [0, 1],\n * which matches WebGPU/Vulkan/DirectX/Metal's clip volume.\n * Passing null/undefined/no value for far will generate infinite projection matrix.\n *\n * @param {mat4} out mat4 frustum matrix will be written into\n * @param {number} fovy Vertical field of view in radians\n * @param {number} aspect Aspect ratio. typically viewport width/height\n * @param {number} near Near bound of the frustum\n * @param {number} far Far bound of the frustum, can be null or Infinity\n * @returns {mat4} out\n */\nexport function perspectiveZO(out, fovy, aspect, near, far) {\n var f = 1.0 / Math.tan(fovy / 2);\n out[0] = f / aspect;\n out[1] = 0;\n out[2] = 0;\n out[3] = 0;\n out[4] = 0;\n out[5] = f;\n out[6] = 0;\n out[7] = 0;\n out[8] = 0;\n out[9] = 0;\n out[11] = -1;\n out[12] = 0;\n out[13] = 0;\n out[15] = 0;\n if (far != null && far !== Infinity) {\n var nf = 1 / (near - far);\n out[10] = far * nf;\n out[14] = far * near * nf;\n } else {\n out[10] = -1;\n out[14] = -near;\n }\n return out;\n}\n\n/**\n * Generates a perspective projection matrix with the given field of view.\n * This is primarily useful for generating projection matrices to be used\n * with the still experiemental WebVR API.\n *\n * @param {mat4} out mat4 frustum matrix will be written into\n * @param {Object} fov Object containing the following values: upDegrees, downDegrees, leftDegrees, rightDegrees\n * @param {number} near Near bound of the frustum\n * @param {number} far Far bound of the frustum\n * @returns {mat4} out\n */\nexport function perspectiveFromFieldOfView(out, fov, near, far) {\n var upTan = Math.tan(fov.upDegrees * Math.PI / 180.0);\n var downTan = Math.tan(fov.downDegrees * Math.PI / 180.0);\n var leftTan = Math.tan(fov.leftDegrees * Math.PI / 180.0);\n var rightTan = Math.tan(fov.rightDegrees * Math.PI / 180.0);\n var xScale = 2.0 / (leftTan + rightTan);\n var yScale = 2.0 / (upTan + downTan);\n out[0] = xScale;\n out[1] = 0.0;\n out[2] = 0.0;\n out[3] = 0.0;\n out[4] = 0.0;\n out[5] = yScale;\n out[6] = 0.0;\n out[7] = 0.0;\n out[8] = -((leftTan - rightTan) * xScale * 0.5);\n out[9] = (upTan - downTan) * yScale * 0.5;\n out[10] = far / (near - far);\n out[11] = -1.0;\n out[12] = 0.0;\n out[13] = 0.0;\n out[14] = far * near / (near - far);\n out[15] = 0.0;\n return out;\n}\n\n/**\n * Generates a orthogonal projection matrix with the given bounds.\n * The near/far clip planes correspond to a normalized device coordinate Z range of [-1, 1],\n * which matches WebGL/OpenGL's clip volume.\n *\n * @param {mat4} out mat4 frustum matrix will be written into\n * @param {number} left Left bound of the frustum\n * @param {number} right Right bound of the frustum\n * @param {number} bottom Bottom bound of the frustum\n * @param {number} top Top bound of the frustum\n * @param {number} near Near bound of the frustum\n * @param {number} far Far bound of the frustum\n * @returns {mat4} out\n */\nexport function orthoNO(out, left, right, bottom, top, near, far) {\n var lr = 1 / (left - right);\n var bt = 1 / (bottom - top);\n var nf = 1 / (near - far);\n out[0] = -2 * lr;\n out[1] = 0;\n out[2] = 0;\n out[3] = 0;\n out[4] = 0;\n out[5] = -2 * bt;\n out[6] = 0;\n out[7] = 0;\n out[8] = 0;\n out[9] = 0;\n out[10] = 2 * nf;\n out[11] = 0;\n out[12] = (left + right) * lr;\n out[13] = (top + bottom) * bt;\n out[14] = (far + near) * nf;\n out[15] = 1;\n return out;\n}\n\n/**\n * Alias for {@link mat4.orthoNO}\n * @function\n */\nexport var ortho = orthoNO;\n\n/**\n * Generates a orthogonal projection matrix with the given bounds.\n * The near/far clip planes correspond to a normalized device coordinate Z range of [0, 1],\n * which matches WebGPU/Vulkan/DirectX/Metal's clip volume.\n *\n * @param {mat4} out mat4 frustum matrix will be written into\n * @param {number} left Left bound of the frustum\n * @param {number} right Right bound of the frustum\n * @param {number} bottom Bottom bound of the frustum\n * @param {number} top Top bound of the frustum\n * @param {number} near Near bound of the frustum\n * @param {number} far Far bound of the frustum\n * @returns {mat4} out\n */\nexport function orthoZO(out, left, right, bottom, top, near, far) {\n var lr = 1 / (left - right);\n var bt = 1 / (bottom - top);\n var nf = 1 / (near - far);\n out[0] = -2 * lr;\n out[1] = 0;\n out[2] = 0;\n out[3] = 0;\n out[4] = 0;\n out[5] = -2 * bt;\n out[6] = 0;\n out[7] = 0;\n out[8] = 0;\n out[9] = 0;\n out[10] = nf;\n out[11] = 0;\n out[12] = (left + right) * lr;\n out[13] = (top + bottom) * bt;\n out[14] = near * nf;\n out[15] = 1;\n return out;\n}\n\n/**\n * Generates a look-at matrix with the given eye position, focal point, and up axis.\n * If you want a matrix that actually makes an object look at another object, you should use targetTo instead.\n *\n * @param {mat4} out mat4 frustum matrix will be written into\n * @param {ReadonlyVec3} eye Position of the viewer\n * @param {ReadonlyVec3} center Point the viewer is looking at\n * @param {ReadonlyVec3} up vec3 pointing up\n * @returns {mat4} out\n */\nexport function lookAt(out, eye, center, up) {\n var x0, x1, x2, y0, y1, y2, z0, z1, z2, len;\n var eyex = eye[0];\n var eyey = eye[1];\n var eyez = eye[2];\n var upx = up[0];\n var upy = up[1];\n var upz = up[2];\n var centerx = center[0];\n var centery = center[1];\n var centerz = center[2];\n if (Math.abs(eyex - centerx) < glMatrix.EPSILON && Math.abs(eyey - centery) < glMatrix.EPSILON && Math.abs(eyez - centerz) < glMatrix.EPSILON) {\n return identity(out);\n }\n z0 = eyex - centerx;\n z1 = eyey - centery;\n z2 = eyez - centerz;\n len = 1 / Math.sqrt(z0 * z0 + z1 * z1 + z2 * z2);\n z0 *= len;\n z1 *= len;\n z2 *= len;\n x0 = upy * z2 - upz * z1;\n x1 = upz * z0 - upx * z2;\n x2 = upx * z1 - upy * z0;\n len = Math.sqrt(x0 * x0 + x1 * x1 + x2 * x2);\n if (!len) {\n x0 = 0;\n x1 = 0;\n x2 = 0;\n } else {\n len = 1 / len;\n x0 *= len;\n x1 *= len;\n x2 *= len;\n }\n y0 = z1 * x2 - z2 * x1;\n y1 = z2 * x0 - z0 * x2;\n y2 = z0 * x1 - z1 * x0;\n len = Math.sqrt(y0 * y0 + y1 * y1 + y2 * y2);\n if (!len) {\n y0 = 0;\n y1 = 0;\n y2 = 0;\n } else {\n len = 1 / len;\n y0 *= len;\n y1 *= len;\n y2 *= len;\n }\n out[0] = x0;\n out[1] = y0;\n out[2] = z0;\n out[3] = 0;\n out[4] = x1;\n out[5] = y1;\n out[6] = z1;\n out[7] = 0;\n out[8] = x2;\n out[9] = y2;\n out[10] = z2;\n out[11] = 0;\n out[12] = -(x0 * eyex + x1 * eyey + x2 * eyez);\n out[13] = -(y0 * eyex + y1 * eyey + y2 * eyez);\n out[14] = -(z0 * eyex + z1 * eyey + z2 * eyez);\n out[15] = 1;\n return out;\n}\n\n/**\n * Generates a matrix that makes something look at something else.\n *\n * @param {mat4} out mat4 frustum matrix will be written into\n * @param {ReadonlyVec3} eye Position of the viewer\n * @param {ReadonlyVec3} target Point the viewer is looking at\n * @param {ReadonlyVec3} up vec3 pointing up\n * @returns {mat4} out\n */\nexport function targetTo(out, eye, target, up) {\n var eyex = eye[0],\n eyey = eye[1],\n eyez = eye[2],\n upx = up[0],\n upy = up[1],\n upz = up[2];\n var z0 = eyex - target[0],\n z1 = eyey - target[1],\n z2 = eyez - target[2];\n var len = z0 * z0 + z1 * z1 + z2 * z2;\n if (len > 0) {\n len = 1 / Math.sqrt(len);\n z0 *= len;\n z1 *= len;\n z2 *= len;\n }\n var x0 = upy * z2 - upz * z1,\n x1 = upz * z0 - upx * z2,\n x2 = upx * z1 - upy * z0;\n len = x0 * x0 + x1 * x1 + x2 * x2;\n if (len > 0) {\n len = 1 / Math.sqrt(len);\n x0 *= len;\n x1 *= len;\n x2 *= len;\n }\n out[0] = x0;\n out[1] = x1;\n out[2] = x2;\n out[3] = 0;\n out[4] = z1 * x2 - z2 * x1;\n out[5] = z2 * x0 - z0 * x2;\n out[6] = z0 * x1 - z1 * x0;\n out[7] = 0;\n out[8] = z0;\n out[9] = z1;\n out[10] = z2;\n out[11] = 0;\n out[12] = eyex;\n out[13] = eyey;\n out[14] = eyez;\n out[15] = 1;\n return out;\n}\n\n/**\n * Returns a string representation of a mat4\n *\n * @param {ReadonlyMat4} a matrix to represent as a string\n * @returns {String} string representation of the matrix\n */\nexport function str(a) {\n return \"mat4(\" + a[0] + \", \" + a[1] + \", \" + a[2] + \", \" + a[3] + \", \" + a[4] + \", \" + a[5] + \", \" + a[6] + \", \" + a[7] + \", \" + a[8] + \", \" + a[9] + \", \" + a[10] + \", \" + a[11] + \", \" + a[12] + \", \" + a[13] + \", \" + a[14] + \", \" + a[15] + \")\";\n}\n\n/**\n * Returns Frobenius norm of a mat4\n *\n * @param {ReadonlyMat4} a the matrix to calculate Frobenius norm of\n * @returns {Number} Frobenius norm\n */\nexport function frob(a) {\n return Math.sqrt(a[0] * a[0] + a[1] * a[1] + a[2] * a[2] + a[3] * a[3] + a[4] * a[4] + a[5] * a[5] + a[6] * a[6] + a[7] * a[7] + a[8] * a[8] + a[9] * a[9] + a[10] * a[10] + a[11] * a[11] + a[12] * a[12] + a[13] * a[13] + a[14] * a[14] + a[15] * a[15]);\n}\n\n/**\n * Adds two mat4's\n *\n * @param {mat4} out the receiving matrix\n * @param {ReadonlyMat4} a the first operand\n * @param {ReadonlyMat4} b the second operand\n * @returns {mat4} out\n */\nexport function add(out, a, b) {\n out[0] = a[0] + b[0];\n out[1] = a[1] + b[1];\n out[2] = a[2] + b[2];\n out[3] = a[3] + b[3];\n out[4] = a[4] + b[4];\n out[5] = a[5] + b[5];\n out[6] = a[6] + b[6];\n out[7] = a[7] + b[7];\n out[8] = a[8] + b[8];\n out[9] = a[9] + b[9];\n out[10] = a[10] + b[10];\n out[11] = a[11] + b[11];\n out[12] = a[12] + b[12];\n out[13] = a[13] + b[13];\n out[14] = a[14] + b[14];\n out[15] = a[15] + b[15];\n return out;\n}\n\n/**\n * Subtracts matrix b from matrix a\n *\n * @param {mat4} out the receiving matrix\n * @param {ReadonlyMat4} a the first operand\n * @param {ReadonlyMat4} b the second operand\n * @returns {mat4} out\n */\nexport function subtract(out, a, b) {\n out[0] = a[0] - b[0];\n out[1] = a[1] - b[1];\n out[2] = a[2] - b[2];\n out[3] = a[3] - b[3];\n out[4] = a[4] - b[4];\n out[5] = a[5] - b[5];\n out[6] = a[6] - b[6];\n out[7] = a[7] - b[7];\n out[8] = a[8] - b[8];\n out[9] = a[9] - b[9];\n out[10] = a[10] - b[10];\n out[11] = a[11] - b[11];\n out[12] = a[12] - b[12];\n out[13] = a[13] - b[13];\n out[14] = a[14] - b[14];\n out[15] = a[15] - b[15];\n return out;\n}\n\n/**\n * Multiply each element of the matrix by a scalar.\n *\n * @param {mat4} out the receiving matrix\n * @param {ReadonlyMat4} a the matrix to scale\n * @param {Number} b amount to scale the matrix's elements by\n * @returns {mat4} out\n */\nexport function multiplyScalar(out, a, b) {\n out[0] = a[0] * b;\n out[1] = a[1] * b;\n out[2] = a[2] * b;\n out[3] = a[3] * b;\n out[4] = a[4] * b;\n out[5] = a[5] * b;\n out[6] = a[6] * b;\n out[7] = a[7] * b;\n out[8] = a[8] * b;\n out[9] = a[9] * b;\n out[10] = a[10] * b;\n out[11] = a[11] * b;\n out[12] = a[12] * b;\n out[13] = a[13] * b;\n out[14] = a[14] * b;\n out[15] = a[15] * b;\n return out;\n}\n\n/**\n * Adds two mat4's after multiplying each element of the second operand by a scalar value.\n *\n * @param {mat4} out the receiving vector\n * @param {ReadonlyMat4} a the first operand\n * @param {ReadonlyMat4} b the second operand\n * @param {Number} scale the amount to scale b's elements by before adding\n * @returns {mat4} out\n */\nexport function multiplyScalarAndAdd(out, a, b, scale) {\n out[0] = a[0] + b[0] * scale;\n out[1] = a[1] + b[1] * scale;\n out[2] = a[2] + b[2] * scale;\n out[3] = a[3] + b[3] * scale;\n out[4] = a[4] + b[4] * scale;\n out[5] = a[5] + b[5] * scale;\n out[6] = a[6] + b[6] * scale;\n out[7] = a[7] + b[7] * scale;\n out[8] = a[8] + b[8] * scale;\n out[9] = a[9] + b[9] * scale;\n out[10] = a[10] + b[10] * scale;\n out[11] = a[11] + b[11] * scale;\n out[12] = a[12] + b[12] * scale;\n out[13] = a[13] + b[13] * scale;\n out[14] = a[14] + b[14] * scale;\n out[15] = a[15] + b[15] * scale;\n return out;\n}\n\n/**\n * Returns whether or not the matrices have exactly the same elements in the same position (when compared with ===)\n *\n * @param {ReadonlyMat4} a The first matrix.\n * @param {ReadonlyMat4} b The second matrix.\n * @returns {Boolean} True if the matrices are equal, false otherwise.\n */\nexport function exactEquals(a, b) {\n return a[0] === b[0] && a[1] === b[1] && a[2] === b[2] && a[3] === b[3] && a[4] === b[4] && a[5] === b[5] && a[6] === b[6] && a[7] === b[7] && a[8] === b[8] && a[9] === b[9] && a[10] === b[10] && a[11] === b[11] && a[12] === b[12] && a[13] === b[13] && a[14] === b[14] && a[15] === b[15];\n}\n\n/**\n * Returns whether or not the matrices have approximately the same elements in the same position.\n *\n * @param {ReadonlyMat4} a The first matrix.\n * @param {ReadonlyMat4} b The second matrix.\n * @returns {Boolean} True if the matrices are equal, false otherwise.\n */\nexport function equals(a, b) {\n var a0 = a[0],\n a1 = a[1],\n a2 = a[2],\n a3 = a[3];\n var a4 = a[4],\n a5 = a[5],\n a6 = a[6],\n a7 = a[7];\n var a8 = a[8],\n a9 = a[9],\n a10 = a[10],\n a11 = a[11];\n var a12 = a[12],\n a13 = a[13],\n a14 = a[14],\n a15 = a[15];\n var b0 = b[0],\n b1 = b[1],\n b2 = b[2],\n b3 = b[3];\n var b4 = b[4],\n b5 = b[5],\n b6 = b[6],\n b7 = b[7];\n var b8 = b[8],\n b9 = b[9],\n b10 = b[10],\n b11 = b[11];\n var b12 = b[12],\n b13 = b[13],\n b14 = b[14],\n b15 = b[15];\n return Math.abs(a0 - b0) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a0), Math.abs(b0)) && Math.abs(a1 - b1) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a1), Math.abs(b1)) && Math.abs(a2 - b2) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a2), Math.abs(b2)) && Math.abs(a3 - b3) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a3), Math.abs(b3)) && Math.abs(a4 - b4) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a4), Math.abs(b4)) && Math.abs(a5 - b5) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a5), Math.abs(b5)) && Math.abs(a6 - b6) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a6), Math.abs(b6)) && Math.abs(a7 - b7) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a7), Math.abs(b7)) && Math.abs(a8 - b8) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a8), Math.abs(b8)) && Math.abs(a9 - b9) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a9), Math.abs(b9)) && Math.abs(a10 - b10) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a10), Math.abs(b10)) && Math.abs(a11 - b11) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a11), Math.abs(b11)) && Math.abs(a12 - b12) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a12), Math.abs(b12)) && Math.abs(a13 - b13) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a13), Math.abs(b13)) && Math.abs(a14 - b14) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a14), Math.abs(b14)) && Math.abs(a15 - b15) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a15), Math.abs(b15));\n}\n\n/**\n * Alias for {@link mat4.multiply}\n * @function\n */\nexport var mul = multiply;\n\n/**\n * Alias for {@link mat4.subtract}\n * @function\n */\nexport var sub = subtract;","import * as glMatrix from \"./common.js\";\n\n/**\n * 3 Dimensional Vector\n * @module vec3\n */\n\n/**\n * Creates a new, empty vec3\n *\n * @returns {vec3} a new 3D vector\n */\nexport function create() {\n var out = new glMatrix.ARRAY_TYPE(3);\n if (glMatrix.ARRAY_TYPE != Float32Array) {\n out[0] = 0;\n out[1] = 0;\n out[2] = 0;\n }\n return out;\n}\n\n/**\n * Creates a new vec3 initialized with values from an existing vector\n *\n * @param {ReadonlyVec3} a vector to clone\n * @returns {vec3} a new 3D vector\n */\nexport function clone(a) {\n var out = new glMatrix.ARRAY_TYPE(3);\n out[0] = a[0];\n out[1] = a[1];\n out[2] = a[2];\n return out;\n}\n\n/**\n * Calculates the length of a vec3\n *\n * @param {ReadonlyVec3} a vector to calculate length of\n * @returns {Number} length of a\n */\nexport function length(a) {\n var x = a[0];\n var y = a[1];\n var z = a[2];\n return Math.sqrt(x * x + y * y + z * z);\n}\n\n/**\n * Creates a new vec3 initialized with the given values\n *\n * @param {Number} x X component\n * @param {Number} y Y component\n * @param {Number} z Z component\n * @returns {vec3} a new 3D vector\n */\nexport function fromValues(x, y, z) {\n var out = new glMatrix.ARRAY_TYPE(3);\n out[0] = x;\n out[1] = y;\n out[2] = z;\n return out;\n}\n\n/**\n * Copy the values from one vec3 to another\n *\n * @param {vec3} out the receiving vector\n * @param {ReadonlyVec3} a the source vector\n * @returns {vec3} out\n */\nexport function copy(out, a) {\n out[0] = a[0];\n out[1] = a[1];\n out[2] = a[2];\n return out;\n}\n\n/**\n * Set the components of a vec3 to the given values\n *\n * @param {vec3} out the receiving vector\n * @param {Number} x X component\n * @param {Number} y Y component\n * @param {Number} z Z component\n * @returns {vec3} out\n */\nexport function set(out, x, y, z) {\n out[0] = x;\n out[1] = y;\n out[2] = z;\n return out;\n}\n\n/**\n * Adds two vec3's\n *\n * @param {vec3} out the receiving vector\n * @param {ReadonlyVec3} a the first operand\n * @param {ReadonlyVec3} b the second operand\n * @returns {vec3} out\n */\nexport function add(out, a, b) {\n out[0] = a[0] + b[0];\n out[1] = a[1] + b[1];\n out[2] = a[2] + b[2];\n return out;\n}\n\n/**\n * Subtracts vector b from vector a\n *\n * @param {vec3} out the receiving vector\n * @param {ReadonlyVec3} a the first operand\n * @param {ReadonlyVec3} b the second operand\n * @returns {vec3} out\n */\nexport function subtract(out, a, b) {\n out[0] = a[0] - b[0];\n out[1] = a[1] - b[1];\n out[2] = a[2] - b[2];\n return out;\n}\n\n/**\n * Multiplies two vec3's\n *\n * @param {vec3} out the receiving vector\n * @param {ReadonlyVec3} a the first operand\n * @param {ReadonlyVec3} b the second operand\n * @returns {vec3} out\n */\nexport function multiply(out, a, b) {\n out[0] = a[0] * b[0];\n out[1] = a[1] * b[1];\n out[2] = a[2] * b[2];\n return out;\n}\n\n/**\n * Divides two vec3's\n *\n * @param {vec3} out the receiving vector\n * @param {ReadonlyVec3} a the first operand\n * @param {ReadonlyVec3} b the second operand\n * @returns {vec3} out\n */\nexport function divide(out, a, b) {\n out[0] = a[0] / b[0];\n out[1] = a[1] / b[1];\n out[2] = a[2] / b[2];\n return out;\n}\n\n/**\n * Math.ceil the components of a vec3\n *\n * @param {vec3} out the receiving vector\n * @param {ReadonlyVec3} a vector to ceil\n * @returns {vec3} out\n */\nexport function ceil(out, a) {\n out[0] = Math.ceil(a[0]);\n out[1] = Math.ceil(a[1]);\n out[2] = Math.ceil(a[2]);\n return out;\n}\n\n/**\n * Math.floor the components of a vec3\n *\n * @param {vec3} out the receiving vector\n * @param {ReadonlyVec3} a vector to floor\n * @returns {vec3} out\n */\nexport function floor(out, a) {\n out[0] = Math.floor(a[0]);\n out[1] = Math.floor(a[1]);\n out[2] = Math.floor(a[2]);\n return out;\n}\n\n/**\n * Returns the minimum of two vec3's\n *\n * @param {vec3} out the receiving vector\n * @param {ReadonlyVec3} a the first operand\n * @param {ReadonlyVec3} b the second operand\n * @returns {vec3} out\n */\nexport function min(out, a, b) {\n out[0] = Math.min(a[0], b[0]);\n out[1] = Math.min(a[1], b[1]);\n out[2] = Math.min(a[2], b[2]);\n return out;\n}\n\n/**\n * Returns the maximum of two vec3's\n *\n * @param {vec3} out the receiving vector\n * @param {ReadonlyVec3} a the first operand\n * @param {ReadonlyVec3} b the second operand\n * @returns {vec3} out\n */\nexport function max(out, a, b) {\n out[0] = Math.max(a[0], b[0]);\n out[1] = Math.max(a[1], b[1]);\n out[2] = Math.max(a[2], b[2]);\n return out;\n}\n\n/**\n * symmetric round the components of a vec3\n *\n * @param {vec3} out the receiving vector\n * @param {ReadonlyVec3} a vector to round\n * @returns {vec3} out\n */\nexport function round(out, a) {\n out[0] = glMatrix.round(a[0]);\n out[1] = glMatrix.round(a[1]);\n out[2] = glMatrix.round(a[2]);\n return out;\n}\n\n/**\n * Scales a vec3 by a scalar number\n *\n * @param {vec3} out the receiving vector\n * @param {ReadonlyVec3} a the vector to scale\n * @param {Number} b amount to scale the vector by\n * @returns {vec3} out\n */\nexport function scale(out, a, b) {\n out[0] = a[0] * b;\n out[1] = a[1] * b;\n out[2] = a[2] * b;\n return out;\n}\n\n/**\n * Adds two vec3's after scaling the second operand by a scalar value\n *\n * @param {vec3} out the receiving vector\n * @param {ReadonlyVec3} a the first operand\n * @param {ReadonlyVec3} b the second operand\n * @param {Number} scale the amount to scale b by before adding\n * @returns {vec3} out\n */\nexport function scaleAndAdd(out, a, b, scale) {\n out[0] = a[0] + b[0] * scale;\n out[1] = a[1] + b[1] * scale;\n out[2] = a[2] + b[2] * scale;\n return out;\n}\n\n/**\n * Calculates the euclidian distance between two vec3's\n *\n * @param {ReadonlyVec3} a the first operand\n * @param {ReadonlyVec3} b the second operand\n * @returns {Number} distance between a and b\n */\nexport function distance(a, b) {\n var x = b[0] - a[0];\n var y = b[1] - a[1];\n var z = b[2] - a[2];\n return Math.sqrt(x * x + y * y + z * z);\n}\n\n/**\n * Calculates the squared euclidian distance between two vec3's\n *\n * @param {ReadonlyVec3} a the first operand\n * @param {ReadonlyVec3} b the second operand\n * @returns {Number} squared distance between a and b\n */\nexport function squaredDistance(a, b) {\n var x = b[0] - a[0];\n var y = b[1] - a[1];\n var z = b[2] - a[2];\n return x * x + y * y + z * z;\n}\n\n/**\n * Calculates the squared length of a vec3\n *\n * @param {ReadonlyVec3} a vector to calculate squared length of\n * @returns {Number} squared length of a\n */\nexport function squaredLength(a) {\n var x = a[0];\n var y = a[1];\n var z = a[2];\n return x * x + y * y + z * z;\n}\n\n/**\n * Negates the components of a vec3\n *\n * @param {vec3} out the receiving vector\n * @param {ReadonlyVec3} a vector to negate\n * @returns {vec3} out\n */\nexport function negate(out, a) {\n out[0] = -a[0];\n out[1] = -a[1];\n out[2] = -a[2];\n return out;\n}\n\n/**\n * Returns the inverse of the components of a vec3\n *\n * @param {vec3} out the receiving vector\n * @param {ReadonlyVec3} a vector to invert\n * @returns {vec3} out\n */\nexport function inverse(out, a) {\n out[0] = 1.0 / a[0];\n out[1] = 1.0 / a[1];\n out[2] = 1.0 / a[2];\n return out;\n}\n\n/**\n * Normalize a vec3\n *\n * @param {vec3} out the receiving vector\n * @param {ReadonlyVec3} a vector to normalize\n * @returns {vec3} out\n */\nexport function normalize(out, a) {\n var x = a[0];\n var y = a[1];\n var z = a[2];\n var len = x * x + y * y + z * z;\n if (len > 0) {\n //TODO: evaluate use of glm_invsqrt here?\n len = 1 / Math.sqrt(len);\n }\n out[0] = a[0] * len;\n out[1] = a[1] * len;\n out[2] = a[2] * len;\n return out;\n}\n\n/**\n * Calculates the dot product of two vec3's\n *\n * @param {ReadonlyVec3} a the first operand\n * @param {ReadonlyVec3} b the second operand\n * @returns {Number} dot product of a and b\n */\nexport function dot(a, b) {\n return a[0] * b[0] + a[1] * b[1] + a[2] * b[2];\n}\n\n/**\n * Computes the cross product of two vec3's\n *\n * @param {vec3} out the receiving vector\n * @param {ReadonlyVec3} a the first operand\n * @param {ReadonlyVec3} b the second operand\n * @returns {vec3} out\n */\nexport function cross(out, a, b) {\n var ax = a[0],\n ay = a[1],\n az = a[2];\n var bx = b[0],\n by = b[1],\n bz = b[2];\n out[0] = ay * bz - az * by;\n out[1] = az * bx - ax * bz;\n out[2] = ax * by - ay * bx;\n return out;\n}\n\n/**\n * Performs a linear interpolation between two vec3's\n *\n * @param {vec3} out the receiving vector\n * @param {ReadonlyVec3} a the first operand\n * @param {ReadonlyVec3} b the second operand\n * @param {Number} t interpolation amount, in the range [0-1], between the two inputs\n * @returns {vec3} out\n */\nexport function lerp(out, a, b, t) {\n var ax = a[0];\n var ay = a[1];\n var az = a[2];\n out[0] = ax + t * (b[0] - ax);\n out[1] = ay + t * (b[1] - ay);\n out[2] = az + t * (b[2] - az);\n return out;\n}\n\n/**\n * Performs a spherical linear interpolation between two vec3's\n *\n * @param {vec3} out the receiving vector\n * @param {ReadonlyVec3} a the first operand\n * @param {ReadonlyVec3} b the second operand\n * @param {Number} t interpolation amount, in the range [0-1], between the two inputs\n * @returns {vec3} out\n */\nexport function slerp(out, a, b, t) {\n var angle = Math.acos(Math.min(Math.max(dot(a, b), -1), 1));\n var sinTotal = Math.sin(angle);\n var ratioA = Math.sin((1 - t) * angle) / sinTotal;\n var ratioB = Math.sin(t * angle) / sinTotal;\n out[0] = ratioA * a[0] + ratioB * b[0];\n out[1] = ratioA * a[1] + ratioB * b[1];\n out[2] = ratioA * a[2] + ratioB * b[2];\n return out;\n}\n\n/**\n * Performs a hermite interpolation with two control points\n *\n * @param {vec3} out the receiving vector\n * @param {ReadonlyVec3} a the first operand\n * @param {ReadonlyVec3} b the second operand\n * @param {ReadonlyVec3} c the third operand\n * @param {ReadonlyVec3} d the fourth operand\n * @param {Number} t interpolation amount, in the range [0-1], between the two inputs\n * @returns {vec3} out\n */\nexport function hermite(out, a, b, c, d, t) {\n var factorTimes2 = t * t;\n var factor1 = factorTimes2 * (2 * t - 3) + 1;\n var factor2 = factorTimes2 * (t - 2) + t;\n var factor3 = factorTimes2 * (t - 1);\n var factor4 = factorTimes2 * (3 - 2 * t);\n out[0] = a[0] * factor1 + b[0] * factor2 + c[0] * factor3 + d[0] * factor4;\n out[1] = a[1] * factor1 + b[1] * factor2 + c[1] * factor3 + d[1] * factor4;\n out[2] = a[2] * factor1 + b[2] * factor2 + c[2] * factor3 + d[2] * factor4;\n return out;\n}\n\n/**\n * Performs a bezier interpolation with two control points\n *\n * @param {vec3} out the receiving vector\n * @param {ReadonlyVec3} a the first operand\n * @param {ReadonlyVec3} b the second operand\n * @param {ReadonlyVec3} c the third operand\n * @param {ReadonlyVec3} d the fourth operand\n * @param {Number} t interpolation amount, in the range [0-1], between the two inputs\n * @returns {vec3} out\n */\nexport function bezier(out, a, b, c, d, t) {\n var inverseFactor = 1 - t;\n var inverseFactorTimesTwo = inverseFactor * inverseFactor;\n var factorTimes2 = t * t;\n var factor1 = inverseFactorTimesTwo * inverseFactor;\n var factor2 = 3 * t * inverseFactorTimesTwo;\n var factor3 = 3 * factorTimes2 * inverseFactor;\n var factor4 = factorTimes2 * t;\n out[0] = a[0] * factor1 + b[0] * factor2 + c[0] * factor3 + d[0] * factor4;\n out[1] = a[1] * factor1 + b[1] * factor2 + c[1] * factor3 + d[1] * factor4;\n out[2] = a[2] * factor1 + b[2] * factor2 + c[2] * factor3 + d[2] * factor4;\n return out;\n}\n\n/**\n * Generates a random vector with the given scale\n *\n * @param {vec3} out the receiving vector\n * @param {Number} [scale] Length of the resulting vector. If omitted, a unit vector will be returned\n * @returns {vec3} out\n */\nexport function random(out, scale) {\n scale = scale === undefined ? 1.0 : scale;\n var r = glMatrix.RANDOM() * 2.0 * Math.PI;\n var z = glMatrix.RANDOM() * 2.0 - 1.0;\n var zScale = Math.sqrt(1.0 - z * z) * scale;\n out[0] = Math.cos(r) * zScale;\n out[1] = Math.sin(r) * zScale;\n out[2] = z * scale;\n return out;\n}\n\n/**\n * Transforms the vec3 with a mat4.\n * 4th vector component is implicitly '1'\n *\n * @param {vec3} out the receiving vector\n * @param {ReadonlyVec3} a the vector to transform\n * @param {ReadonlyMat4} m matrix to transform with\n * @returns {vec3} out\n */\nexport function transformMat4(out, a, m) {\n var x = a[0],\n y = a[1],\n z = a[2];\n var w = m[3] * x + m[7] * y + m[11] * z + m[15];\n w = w || 1.0;\n out[0] = (m[0] * x + m[4] * y + m[8] * z + m[12]) / w;\n out[1] = (m[1] * x + m[5] * y + m[9] * z + m[13]) / w;\n out[2] = (m[2] * x + m[6] * y + m[10] * z + m[14]) / w;\n return out;\n}\n\n/**\n * Transforms the vec3 with a mat3.\n *\n * @param {vec3} out the receiving vector\n * @param {ReadonlyVec3} a the vector to transform\n * @param {ReadonlyMat3} m the 3x3 matrix to transform with\n * @returns {vec3} out\n */\nexport function transformMat3(out, a, m) {\n var x = a[0],\n y = a[1],\n z = a[2];\n out[0] = x * m[0] + y * m[3] + z * m[6];\n out[1] = x * m[1] + y * m[4] + z * m[7];\n out[2] = x * m[2] + y * m[5] + z * m[8];\n return out;\n}\n\n/**\n * Transforms the vec3 with a quat\n * Can also be used for dual quaternions. (Multiply it with the real part)\n *\n * @param {vec3} out the receiving vector\n * @param {ReadonlyVec3} a the vector to transform\n * @param {ReadonlyQuat} q normalized quaternion to transform with\n * @returns {vec3} out\n */\nexport function transformQuat(out, a, q) {\n // Fast Vector Rotation using Quaternions by Robert Eisele\n // https://raw.org/proof/vector-rotation-using-quaternions/\n\n var qx = q[0],\n qy = q[1],\n qz = q[2],\n qw = q[3];\n var vx = a[0],\n vy = a[1],\n vz = a[2];\n\n // t = q x v\n var tx = qy * vz - qz * vy;\n var ty = qz * vx - qx * vz;\n var tz = qx * vy - qy * vx;\n\n // t = 2t\n tx = tx + tx;\n ty = ty + ty;\n tz = tz + tz;\n\n // v + w t + q x t\n out[0] = vx + qw * tx + qy * tz - qz * ty;\n out[1] = vy + qw * ty + qz * tx - qx * tz;\n out[2] = vz + qw * tz + qx * ty - qy * tx;\n return out;\n}\n\n/**\n * Rotate a 3D vector around the x-axis\n * @param {vec3} out The receiving vec3\n * @param {ReadonlyVec3} a The vec3 point to rotate\n * @param {ReadonlyVec3} b The origin of the rotation\n * @param {Number} rad The angle of rotation in radians\n * @returns {vec3} out\n */\nexport function rotateX(out, a, b, rad) {\n var p = [],\n r = [];\n //Translate point to the origin\n p[0] = a[0] - b[0];\n p[1] = a[1] - b[1];\n p[2] = a[2] - b[2];\n\n //perform rotation\n r[0] = p[0];\n r[1] = p[1] * Math.cos(rad) - p[2] * Math.sin(rad);\n r[2] = p[1] * Math.sin(rad) + p[2] * Math.cos(rad);\n\n //translate to correct position\n out[0] = r[0] + b[0];\n out[1] = r[1] + b[1];\n out[2] = r[2] + b[2];\n return out;\n}\n\n/**\n * Rotate a 3D vector around the y-axis\n * @param {vec3} out The receiving vec3\n * @param {ReadonlyVec3} a The vec3 point to rotate\n * @param {ReadonlyVec3} b The origin of the rotation\n * @param {Number} rad The angle of rotation in radians\n * @returns {vec3} out\n */\nexport function rotateY(out, a, b, rad) {\n var p = [],\n r = [];\n //Translate point to the origin\n p[0] = a[0] - b[0];\n p[1] = a[1] - b[1];\n p[2] = a[2] - b[2];\n\n //perform rotation\n r[0] = p[2] * Math.sin(rad) + p[0] * Math.cos(rad);\n r[1] = p[1];\n r[2] = p[2] * Math.cos(rad) - p[0] * Math.sin(rad);\n\n //translate to correct position\n out[0] = r[0] + b[0];\n out[1] = r[1] + b[1];\n out[2] = r[2] + b[2];\n return out;\n}\n\n/**\n * Rotate a 3D vector around the z-axis\n * @param {vec3} out The receiving vec3\n * @param {ReadonlyVec3} a The vec3 point to rotate\n * @param {ReadonlyVec3} b The origin of the rotation\n * @param {Number} rad The angle of rotation in radians\n * @returns {vec3} out\n */\nexport function rotateZ(out, a, b, rad) {\n var p = [],\n r = [];\n //Translate point to the origin\n p[0] = a[0] - b[0];\n p[1] = a[1] - b[1];\n p[2] = a[2] - b[2];\n\n //perform rotation\n r[0] = p[0] * Math.cos(rad) - p[1] * Math.sin(rad);\n r[1] = p[0] * Math.sin(rad) + p[1] * Math.cos(rad);\n r[2] = p[2];\n\n //translate to correct position\n out[0] = r[0] + b[0];\n out[1] = r[1] + b[1];\n out[2] = r[2] + b[2];\n return out;\n}\n\n/**\n * Get the angle between two 3D vectors\n * @param {ReadonlyVec3} a The first operand\n * @param {ReadonlyVec3} b The second operand\n * @returns {Number} The angle in radians\n */\nexport function angle(a, b) {\n var ax = a[0],\n ay = a[1],\n az = a[2],\n bx = b[0],\n by = b[1],\n bz = b[2],\n mag = Math.sqrt((ax * ax + ay * ay + az * az) * (bx * bx + by * by + bz * bz)),\n cosine = mag && dot(a, b) / mag;\n return Math.acos(Math.min(Math.max(cosine, -1), 1));\n}\n\n/**\n * Set the components of a vec3 to zero\n *\n * @param {vec3} out the receiving vector\n * @returns {vec3} out\n */\nexport function zero(out) {\n out[0] = 0.0;\n out[1] = 0.0;\n out[2] = 0.0;\n return out;\n}\n\n/**\n * Returns a string representation of a vector\n *\n * @param {ReadonlyVec3} a vector to represent as a string\n * @returns {String} string representation of the vector\n */\nexport function str(a) {\n return \"vec3(\" + a[0] + \", \" + a[1] + \", \" + a[2] + \")\";\n}\n\n/**\n * Returns whether or not the vectors have exactly the same elements in the same position (when compared with ===)\n *\n * @param {ReadonlyVec3} a The first vector.\n * @param {ReadonlyVec3} b The second vector.\n * @returns {Boolean} True if the vectors are equal, false otherwise.\n */\nexport function exactEquals(a, b) {\n return a[0] === b[0] && a[1] === b[1] && a[2] === b[2];\n}\n\n/**\n * Returns whether or not the vectors have approximately the same elements in the same position.\n *\n * @param {ReadonlyVec3} a The first vector.\n * @param {ReadonlyVec3} b The second vector.\n * @returns {Boolean} True if the vectors are equal, false otherwise.\n */\nexport function equals(a, b) {\n var a0 = a[0],\n a1 = a[1],\n a2 = a[2];\n var b0 = b[0],\n b1 = b[1],\n b2 = b[2];\n return Math.abs(a0 - b0) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a0), Math.abs(b0)) && Math.abs(a1 - b1) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a1), Math.abs(b1)) && Math.abs(a2 - b2) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a2), Math.abs(b2));\n}\n\n/**\n * Alias for {@link vec3.subtract}\n * @function\n */\nexport var sub = subtract;\n\n/**\n * Alias for {@link vec3.multiply}\n * @function\n */\nexport var mul = multiply;\n\n/**\n * Alias for {@link vec3.divide}\n * @function\n */\nexport var div = divide;\n\n/**\n * Alias for {@link vec3.distance}\n * @function\n */\nexport var dist = distance;\n\n/**\n * Alias for {@link vec3.squaredDistance}\n * @function\n */\nexport var sqrDist = squaredDistance;\n\n/**\n * Alias for {@link vec3.length}\n * @function\n */\nexport var len = length;\n\n/**\n * Alias for {@link vec3.squaredLength}\n * @function\n */\nexport var sqrLen = squaredLength;\n\n/**\n * Perform some operation over an array of vec3s.\n *\n * @param {Array} a the array of vectors to iterate over\n * @param {Number} stride Number of elements between the start of each vec3. If 0 assumes tightly packed\n * @param {Number} offset Number of elements to skip at the beginning of the array\n * @param {Number} count Number of vec3s to iterate over. If 0 iterates over entire array\n * @param {Function} fn Function to call for each vector in the array\n * @param {Object} [arg] additional argument to pass to fn\n * @returns {Array} a\n * @function\n */\nexport var forEach = function () {\n var vec = create();\n return function (a, stride, offset, count, fn, arg) {\n var i, l;\n if (!stride) {\n stride = 3;\n }\n if (!offset) {\n offset = 0;\n }\n if (count) {\n l = Math.min(count * stride + offset, a.length);\n } else {\n l = a.length;\n }\n for (i = offset; i < l; i += stride) {\n vec[0] = a[i];\n vec[1] = a[i + 1];\n vec[2] = a[i + 2];\n fn(vec, vec, arg);\n a[i] = vec[0];\n a[i + 1] = vec[1];\n a[i + 2] = vec[2];\n }\n return a;\n };\n}();","import * as glMatrix from \"./common.js\";\n\n/**\n * 4 Dimensional Vector\n * @module vec4\n */\n\n/**\n * Creates a new, empty vec4\n *\n * @returns {vec4} a new 4D vector\n */\nexport function create() {\n var out = new glMatrix.ARRAY_TYPE(4);\n if (glMatrix.ARRAY_TYPE != Float32Array) {\n out[0] = 0;\n out[1] = 0;\n out[2] = 0;\n out[3] = 0;\n }\n return out;\n}\n\n/**\n * Creates a new vec4 initialized with values from an existing vector\n *\n * @param {ReadonlyVec4} a vector to clone\n * @returns {vec4} a new 4D vector\n */\nexport function clone(a) {\n var out = new glMatrix.ARRAY_TYPE(4);\n out[0] = a[0];\n out[1] = a[1];\n out[2] = a[2];\n out[3] = a[3];\n return out;\n}\n\n/**\n * Creates a new vec4 initialized with the given values\n *\n * @param {Number} x X component\n * @param {Number} y Y component\n * @param {Number} z Z component\n * @param {Number} w W component\n * @returns {vec4} a new 4D vector\n */\nexport function fromValues(x, y, z, w) {\n var out = new glMatrix.ARRAY_TYPE(4);\n out[0] = x;\n out[1] = y;\n out[2] = z;\n out[3] = w;\n return out;\n}\n\n/**\n * Copy the values from one vec4 to another\n *\n * @param {vec4} out the receiving vector\n * @param {ReadonlyVec4} a the source vector\n * @returns {vec4} out\n */\nexport function copy(out, a) {\n out[0] = a[0];\n out[1] = a[1];\n out[2] = a[2];\n out[3] = a[3];\n return out;\n}\n\n/**\n * Set the components of a vec4 to the given values\n *\n * @param {vec4} out the receiving vector\n * @param {Number} x X component\n * @param {Number} y Y component\n * @param {Number} z Z component\n * @param {Number} w W component\n * @returns {vec4} out\n */\nexport function set(out, x, y, z, w) {\n out[0] = x;\n out[1] = y;\n out[2] = z;\n out[3] = w;\n return out;\n}\n\n/**\n * Adds two vec4's\n *\n * @param {vec4} out the receiving vector\n * @param {ReadonlyVec4} a the first operand\n * @param {ReadonlyVec4} b the second operand\n * @returns {vec4} out\n */\nexport function add(out, a, b) {\n out[0] = a[0] + b[0];\n out[1] = a[1] + b[1];\n out[2] = a[2] + b[2];\n out[3] = a[3] + b[3];\n return out;\n}\n\n/**\n * Subtracts vector b from vector a\n *\n * @param {vec4} out the receiving vector\n * @param {ReadonlyVec4} a the first operand\n * @param {ReadonlyVec4} b the second operand\n * @returns {vec4} out\n */\nexport function subtract(out, a, b) {\n out[0] = a[0] - b[0];\n out[1] = a[1] - b[1];\n out[2] = a[2] - b[2];\n out[3] = a[3] - b[3];\n return out;\n}\n\n/**\n * Multiplies two vec4's\n *\n * @param {vec4} out the receiving vector\n * @param {ReadonlyVec4} a the first operand\n * @param {ReadonlyVec4} b the second operand\n * @returns {vec4} out\n */\nexport function multiply(out, a, b) {\n out[0] = a[0] * b[0];\n out[1] = a[1] * b[1];\n out[2] = a[2] * b[2];\n out[3] = a[3] * b[3];\n return out;\n}\n\n/**\n * Divides two vec4's\n *\n * @param {vec4} out the receiving vector\n * @param {ReadonlyVec4} a the first operand\n * @param {ReadonlyVec4} b the second operand\n * @returns {vec4} out\n */\nexport function divide(out, a, b) {\n out[0] = a[0] / b[0];\n out[1] = a[1] / b[1];\n out[2] = a[2] / b[2];\n out[3] = a[3] / b[3];\n return out;\n}\n\n/**\n * Math.ceil the components of a vec4\n *\n * @param {vec4} out the receiving vector\n * @param {ReadonlyVec4} a vector to ceil\n * @returns {vec4} out\n */\nexport function ceil(out, a) {\n out[0] = Math.ceil(a[0]);\n out[1] = Math.ceil(a[1]);\n out[2] = Math.ceil(a[2]);\n out[3] = Math.ceil(a[3]);\n return out;\n}\n\n/**\n * Math.floor the components of a vec4\n *\n * @param {vec4} out the receiving vector\n * @param {ReadonlyVec4} a vector to floor\n * @returns {vec4} out\n */\nexport function floor(out, a) {\n out[0] = Math.floor(a[0]);\n out[1] = Math.floor(a[1]);\n out[2] = Math.floor(a[2]);\n out[3] = Math.floor(a[3]);\n return out;\n}\n\n/**\n * Returns the minimum of two vec4's\n *\n * @param {vec4} out the receiving vector\n * @param {ReadonlyVec4} a the first operand\n * @param {ReadonlyVec4} b the second operand\n * @returns {vec4} out\n */\nexport function min(out, a, b) {\n out[0] = Math.min(a[0], b[0]);\n out[1] = Math.min(a[1], b[1]);\n out[2] = Math.min(a[2], b[2]);\n out[3] = Math.min(a[3], b[3]);\n return out;\n}\n\n/**\n * Returns the maximum of two vec4's\n *\n * @param {vec4} out the receiving vector\n * @param {ReadonlyVec4} a the first operand\n * @param {ReadonlyVec4} b the second operand\n * @returns {vec4} out\n */\nexport function max(out, a, b) {\n out[0] = Math.max(a[0], b[0]);\n out[1] = Math.max(a[1], b[1]);\n out[2] = Math.max(a[2], b[2]);\n out[3] = Math.max(a[3], b[3]);\n return out;\n}\n\n/**\n * symmetric round the components of a vec4\n *\n * @param {vec4} out the receiving vector\n * @param {ReadonlyVec4} a vector to round\n * @returns {vec4} out\n */\nexport function round(out, a) {\n out[0] = glMatrix.round(a[0]);\n out[1] = glMatrix.round(a[1]);\n out[2] = glMatrix.round(a[2]);\n out[3] = glMatrix.round(a[3]);\n return out;\n}\n\n/**\n * Scales a vec4 by a scalar number\n *\n * @param {vec4} out the receiving vector\n * @param {ReadonlyVec4} a the vector to scale\n * @param {Number} b amount to scale the vector by\n * @returns {vec4} out\n */\nexport function scale(out, a, b) {\n out[0] = a[0] * b;\n out[1] = a[1] * b;\n out[2] = a[2] * b;\n out[3] = a[3] * b;\n return out;\n}\n\n/**\n * Adds two vec4's after scaling the second operand by a scalar value\n *\n * @param {vec4} out the receiving vector\n * @param {ReadonlyVec4} a the first operand\n * @param {ReadonlyVec4} b the second operand\n * @param {Number} scale the amount to scale b by before adding\n * @returns {vec4} out\n */\nexport function scaleAndAdd(out, a, b, scale) {\n out[0] = a[0] + b[0] * scale;\n out[1] = a[1] + b[1] * scale;\n out[2] = a[2] + b[2] * scale;\n out[3] = a[3] + b[3] * scale;\n return out;\n}\n\n/**\n * Calculates the euclidian distance between two vec4's\n *\n * @param {ReadonlyVec4} a the first operand\n * @param {ReadonlyVec4} b the second operand\n * @returns {Number} distance between a and b\n */\nexport function distance(a, b) {\n var x = b[0] - a[0];\n var y = b[1] - a[1];\n var z = b[2] - a[2];\n var w = b[3] - a[3];\n return Math.sqrt(x * x + y * y + z * z + w * w);\n}\n\n/**\n * Calculates the squared euclidian distance between two vec4's\n *\n * @param {ReadonlyVec4} a the first operand\n * @param {ReadonlyVec4} b the second operand\n * @returns {Number} squared distance between a and b\n */\nexport function squaredDistance(a, b) {\n var x = b[0] - a[0];\n var y = b[1] - a[1];\n var z = b[2] - a[2];\n var w = b[3] - a[3];\n return x * x + y * y + z * z + w * w;\n}\n\n/**\n * Calculates the length of a vec4\n *\n * @param {ReadonlyVec4} a vector to calculate length of\n * @returns {Number} length of a\n */\nexport function length(a) {\n var x = a[0];\n var y = a[1];\n var z = a[2];\n var w = a[3];\n return Math.sqrt(x * x + y * y + z * z + w * w);\n}\n\n/**\n * Calculates the squared length of a vec4\n *\n * @param {ReadonlyVec4} a vector to calculate squared length of\n * @returns {Number} squared length of a\n */\nexport function squaredLength(a) {\n var x = a[0];\n var y = a[1];\n var z = a[2];\n var w = a[3];\n return x * x + y * y + z * z + w * w;\n}\n\n/**\n * Negates the components of a vec4\n *\n * @param {vec4} out the receiving vector\n * @param {ReadonlyVec4} a vector to negate\n * @returns {vec4} out\n */\nexport function negate(out, a) {\n out[0] = -a[0];\n out[1] = -a[1];\n out[2] = -a[2];\n out[3] = -a[3];\n return out;\n}\n\n/**\n * Returns the inverse of the components of a vec4\n *\n * @param {vec4} out the receiving vector\n * @param {ReadonlyVec4} a vector to invert\n * @returns {vec4} out\n */\nexport function inverse(out, a) {\n out[0] = 1.0 / a[0];\n out[1] = 1.0 / a[1];\n out[2] = 1.0 / a[2];\n out[3] = 1.0 / a[3];\n return out;\n}\n\n/**\n * Normalize a vec4\n *\n * @param {vec4} out the receiving vector\n * @param {ReadonlyVec4} a vector to normalize\n * @returns {vec4} out\n */\nexport function normalize(out, a) {\n var x = a[0];\n var y = a[1];\n var z = a[2];\n var w = a[3];\n var len = x * x + y * y + z * z + w * w;\n if (len > 0) {\n len = 1 / Math.sqrt(len);\n }\n out[0] = x * len;\n out[1] = y * len;\n out[2] = z * len;\n out[3] = w * len;\n return out;\n}\n\n/**\n * Calculates the dot product of two vec4's\n *\n * @param {ReadonlyVec4} a the first operand\n * @param {ReadonlyVec4} b the second operand\n * @returns {Number} dot product of a and b\n */\nexport function dot(a, b) {\n return a[0] * b[0] + a[1] * b[1] + a[2] * b[2] + a[3] * b[3];\n}\n\n/**\n * Returns the cross-product of three vectors in a 4-dimensional space\n *\n * @param {ReadonlyVec4} out the receiving vector\n * @param {ReadonlyVec4} u the first vector\n * @param {ReadonlyVec4} v the second vector\n * @param {ReadonlyVec4} w the third vector\n * @returns {vec4} result\n */\nexport function cross(out, u, v, w) {\n var A = v[0] * w[1] - v[1] * w[0],\n B = v[0] * w[2] - v[2] * w[0],\n C = v[0] * w[3] - v[3] * w[0],\n D = v[1] * w[2] - v[2] * w[1],\n E = v[1] * w[3] - v[3] * w[1],\n F = v[2] * w[3] - v[3] * w[2];\n var G = u[0];\n var H = u[1];\n var I = u[2];\n var J = u[3];\n out[0] = H * F - I * E + J * D;\n out[1] = -(G * F) + I * C - J * B;\n out[2] = G * E - H * C + J * A;\n out[3] = -(G * D) + H * B - I * A;\n return out;\n}\n\n/**\n * Performs a linear interpolation between two vec4's\n *\n * @param {vec4} out the receiving vector\n * @param {ReadonlyVec4} a the first operand\n * @param {ReadonlyVec4} b the second operand\n * @param {Number} t interpolation amount, in the range [0-1], between the two inputs\n * @returns {vec4} out\n */\nexport function lerp(out, a, b, t) {\n var ax = a[0];\n var ay = a[1];\n var az = a[2];\n var aw = a[3];\n out[0] = ax + t * (b[0] - ax);\n out[1] = ay + t * (b[1] - ay);\n out[2] = az + t * (b[2] - az);\n out[3] = aw + t * (b[3] - aw);\n return out;\n}\n\n/**\n * Generates a random vector with the given scale\n *\n * @param {vec4} out the receiving vector\n * @param {Number} [scale] Length of the resulting vector. If omitted, a unit vector will be returned\n * @returns {vec4} out\n */\nexport function random(out, scale) {\n scale = scale === undefined ? 1.0 : scale;\n\n // Marsaglia, George. Choosing a Point from the Surface of a\n // Sphere. Ann. Math. Statist. 43 (1972), no. 2, 645--646.\n // http://projecteuclid.org/euclid.aoms/1177692644;\n var v1, v2, v3, v4;\n var s1, s2;\n var rand;\n rand = glMatrix.RANDOM();\n v1 = rand * 2 - 1;\n v2 = (4 * glMatrix.RANDOM() - 2) * Math.sqrt(rand * -rand + rand);\n s1 = v1 * v1 + v2 * v2;\n rand = glMatrix.RANDOM();\n v3 = rand * 2 - 1;\n v4 = (4 * glMatrix.RANDOM() - 2) * Math.sqrt(rand * -rand + rand);\n s2 = v3 * v3 + v4 * v4;\n var d = Math.sqrt((1 - s1) / s2);\n out[0] = scale * v1;\n out[1] = scale * v2;\n out[2] = scale * v3 * d;\n out[3] = scale * v4 * d;\n return out;\n}\n\n/**\n * Transforms the vec4 with a mat4.\n *\n * @param {vec4} out the receiving vector\n * @param {ReadonlyVec4} a the vector to transform\n * @param {ReadonlyMat4} m matrix to transform with\n * @returns {vec4} out\n */\nexport function transformMat4(out, a, m) {\n var x = a[0],\n y = a[1],\n z = a[2],\n w = a[3];\n out[0] = m[0] * x + m[4] * y + m[8] * z + m[12] * w;\n out[1] = m[1] * x + m[5] * y + m[9] * z + m[13] * w;\n out[2] = m[2] * x + m[6] * y + m[10] * z + m[14] * w;\n out[3] = m[3] * x + m[7] * y + m[11] * z + m[15] * w;\n return out;\n}\n\n/**\n * Transforms the vec4 with a quat\n *\n * @param {vec4} out the receiving vector\n * @param {ReadonlyVec4} a the vector to transform\n * @param {ReadonlyQuat} q normalized quaternion to transform with\n * @returns {vec4} out\n */\nexport function transformQuat(out, a, q) {\n // Fast Vector Rotation using Quaternions by Robert Eisele\n // https://raw.org/proof/vector-rotation-using-quaternions/\n\n var qx = q[0],\n qy = q[1],\n qz = q[2],\n qw = q[3];\n var vx = a[0],\n vy = a[1],\n vz = a[2];\n\n // t = q x v\n var tx = qy * vz - qz * vy;\n var ty = qz * vx - qx * vz;\n var tz = qx * vy - qy * vx;\n\n // t = 2t\n tx = tx + tx;\n ty = ty + ty;\n tz = tz + tz;\n\n // v + w t + q x t\n out[0] = vx + qw * tx + qy * tz - qz * ty;\n out[1] = vy + qw * ty + qz * tx - qx * tz;\n out[2] = vz + qw * tz + qx * ty - qy * tx;\n out[3] = a[3];\n return out;\n}\n\n/**\n * Set the components of a vec4 to zero\n *\n * @param {vec4} out the receiving vector\n * @returns {vec4} out\n */\nexport function zero(out) {\n out[0] = 0.0;\n out[1] = 0.0;\n out[2] = 0.0;\n out[3] = 0.0;\n return out;\n}\n\n/**\n * Returns a string representation of a vector\n *\n * @param {ReadonlyVec4} a vector to represent as a string\n * @returns {String} string representation of the vector\n */\nexport function str(a) {\n return \"vec4(\" + a[0] + \", \" + a[1] + \", \" + a[2] + \", \" + a[3] + \")\";\n}\n\n/**\n * Returns whether or not the vectors have exactly the same elements in the same position (when compared with ===)\n *\n * @param {ReadonlyVec4} a The first vector.\n * @param {ReadonlyVec4} b The second vector.\n * @returns {Boolean} True if the vectors are equal, false otherwise.\n */\nexport function exactEquals(a, b) {\n return a[0] === b[0] && a[1] === b[1] && a[2] === b[2] && a[3] === b[3];\n}\n\n/**\n * Returns whether or not the vectors have approximately the same elements in the same position.\n *\n * @param {ReadonlyVec4} a The first vector.\n * @param {ReadonlyVec4} b The second vector.\n * @returns {Boolean} True if the vectors are equal, false otherwise.\n */\nexport function equals(a, b) {\n var a0 = a[0],\n a1 = a[1],\n a2 = a[2],\n a3 = a[3];\n var b0 = b[0],\n b1 = b[1],\n b2 = b[2],\n b3 = b[3];\n return Math.abs(a0 - b0) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a0), Math.abs(b0)) && Math.abs(a1 - b1) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a1), Math.abs(b1)) && Math.abs(a2 - b2) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a2), Math.abs(b2)) && Math.abs(a3 - b3) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a3), Math.abs(b3));\n}\n\n/**\n * Alias for {@link vec4.subtract}\n * @function\n */\nexport var sub = subtract;\n\n/**\n * Alias for {@link vec4.multiply}\n * @function\n */\nexport var mul = multiply;\n\n/**\n * Alias for {@link vec4.divide}\n * @function\n */\nexport var div = divide;\n\n/**\n * Alias for {@link vec4.distance}\n * @function\n */\nexport var dist = distance;\n\n/**\n * Alias for {@link vec4.squaredDistance}\n * @function\n */\nexport var sqrDist = squaredDistance;\n\n/**\n * Alias for {@link vec4.length}\n * @function\n */\nexport var len = length;\n\n/**\n * Alias for {@link vec4.squaredLength}\n * @function\n */\nexport var sqrLen = squaredLength;\n\n/**\n * Perform some operation over an array of vec4s.\n *\n * @param {Array} a the array of vectors to iterate over\n * @param {Number} stride Number of elements between the start of each vec4. If 0 assumes tightly packed\n * @param {Number} offset Number of elements to skip at the beginning of the array\n * @param {Number} count Number of vec4s to iterate over. If 0 iterates over entire array\n * @param {Function} fn Function to call for each vector in the array\n * @param {Object} [arg] additional argument to pass to fn\n * @returns {Array} a\n * @function\n */\nexport var forEach = function () {\n var vec = create();\n return function (a, stride, offset, count, fn, arg) {\n var i, l;\n if (!stride) {\n stride = 4;\n }\n if (!offset) {\n offset = 0;\n }\n if (count) {\n l = Math.min(count * stride + offset, a.length);\n } else {\n l = a.length;\n }\n for (i = offset; i < l; i += stride) {\n vec[0] = a[i];\n vec[1] = a[i + 1];\n vec[2] = a[i + 2];\n vec[3] = a[i + 3];\n fn(vec, vec, arg);\n a[i] = vec[0];\n a[i + 1] = vec[1];\n a[i + 2] = vec[2];\n a[i + 3] = vec[3];\n }\n return a;\n };\n}();","import * as glMatrix from \"./common.js\";\nimport * as mat3 from \"./mat3.js\";\nimport * as vec3 from \"./vec3.js\";\nimport * as vec4 from \"./vec4.js\";\n\n/**\n * Quaternion in the format XYZW\n * @module quat\n */\n\n/**\n * Creates a new identity quat\n *\n * @returns {quat} a new quaternion\n */\nexport function create() {\n var out = new glMatrix.ARRAY_TYPE(4);\n if (glMatrix.ARRAY_TYPE != Float32Array) {\n out[0] = 0;\n out[1] = 0;\n out[2] = 0;\n }\n out[3] = 1;\n return out;\n}\n\n/**\n * Set a quat to the identity quaternion\n *\n * @param {quat} out the receiving quaternion\n * @returns {quat} out\n */\nexport function identity(out) {\n out[0] = 0;\n out[1] = 0;\n out[2] = 0;\n out[3] = 1;\n return out;\n}\n\n/**\n * Sets a quat from the given angle and rotation axis,\n * then returns it.\n *\n * @param {quat} out the receiving quaternion\n * @param {ReadonlyVec3} axis the axis around which to rotate\n * @param {Number} rad the angle in radians\n * @returns {quat} out\n **/\nexport function setAxisAngle(out, axis, rad) {\n rad = rad * 0.5;\n var s = Math.sin(rad);\n out[0] = s * axis[0];\n out[1] = s * axis[1];\n out[2] = s * axis[2];\n out[3] = Math.cos(rad);\n return out;\n}\n\n/**\n * Gets the rotation axis and angle for a given\n * quaternion. If a quaternion is created with\n * setAxisAngle, this method will return the same\n * values as providied in the original parameter list\n * OR functionally equivalent values.\n * Example: The quaternion formed by axis [0, 0, 1] and\n * angle -90 is the same as the quaternion formed by\n * [0, 0, 1] and 270. This method favors the latter.\n * @param {vec3} out_axis Vector receiving the axis of rotation\n * @param {ReadonlyQuat} q Quaternion to be decomposed\n * @return {Number} Angle, in radians, of the rotation\n */\nexport function getAxisAngle(out_axis, q) {\n var rad = Math.acos(q[3]) * 2.0;\n var s = Math.sin(rad / 2.0);\n if (s > glMatrix.EPSILON) {\n out_axis[0] = q[0] / s;\n out_axis[1] = q[1] / s;\n out_axis[2] = q[2] / s;\n } else {\n // If s is zero, return any axis (no rotation - axis does not matter)\n out_axis[0] = 1;\n out_axis[1] = 0;\n out_axis[2] = 0;\n }\n return rad;\n}\n\n/**\n * Gets the angular distance between two unit quaternions\n *\n * @param {ReadonlyQuat} a Origin unit quaternion\n * @param {ReadonlyQuat} b Destination unit quaternion\n * @return {Number} Angle, in radians, between the two quaternions\n */\nexport function getAngle(a, b) {\n var dotproduct = dot(a, b);\n return Math.acos(2 * dotproduct * dotproduct - 1);\n}\n\n/**\n * Multiplies two quat's\n *\n * @param {quat} out the receiving quaternion\n * @param {ReadonlyQuat} a the first operand\n * @param {ReadonlyQuat} b the second operand\n * @returns {quat} out\n */\nexport function multiply(out, a, b) {\n var ax = a[0],\n ay = a[1],\n az = a[2],\n aw = a[3];\n var bx = b[0],\n by = b[1],\n bz = b[2],\n bw = b[3];\n out[0] = ax * bw + aw * bx + ay * bz - az * by;\n out[1] = ay * bw + aw * by + az * bx - ax * bz;\n out[2] = az * bw + aw * bz + ax * by - ay * bx;\n out[3] = aw * bw - ax * bx - ay * by - az * bz;\n return out;\n}\n\n/**\n * Rotates a quaternion by the given angle about the X axis\n *\n * @param {quat} out quat receiving operation result\n * @param {ReadonlyQuat} a quat to rotate\n * @param {number} rad angle (in radians) to rotate\n * @returns {quat} out\n */\nexport function rotateX(out, a, rad) {\n rad *= 0.5;\n var ax = a[0],\n ay = a[1],\n az = a[2],\n aw = a[3];\n var bx = Math.sin(rad),\n bw = Math.cos(rad);\n out[0] = ax * bw + aw * bx;\n out[1] = ay * bw + az * bx;\n out[2] = az * bw - ay * bx;\n out[3] = aw * bw - ax * bx;\n return out;\n}\n\n/**\n * Rotates a quaternion by the given angle about the Y axis\n *\n * @param {quat} out quat receiving operation result\n * @param {ReadonlyQuat} a quat to rotate\n * @param {number} rad angle (in radians) to rotate\n * @returns {quat} out\n */\nexport function rotateY(out, a, rad) {\n rad *= 0.5;\n var ax = a[0],\n ay = a[1],\n az = a[2],\n aw = a[3];\n var by = Math.sin(rad),\n bw = Math.cos(rad);\n out[0] = ax * bw - az * by;\n out[1] = ay * bw + aw * by;\n out[2] = az * bw + ax * by;\n out[3] = aw * bw - ay * by;\n return out;\n}\n\n/**\n * Rotates a quaternion by the given angle about the Z axis\n *\n * @param {quat} out quat receiving operation result\n * @param {ReadonlyQuat} a quat to rotate\n * @param {number} rad angle (in radians) to rotate\n * @returns {quat} out\n */\nexport function rotateZ(out, a, rad) {\n rad *= 0.5;\n var ax = a[0],\n ay = a[1],\n az = a[2],\n aw = a[3];\n var bz = Math.sin(rad),\n bw = Math.cos(rad);\n out[0] = ax * bw + ay * bz;\n out[1] = ay * bw - ax * bz;\n out[2] = az * bw + aw * bz;\n out[3] = aw * bw - az * bz;\n return out;\n}\n\n/**\n * Calculates the W component of a quat from the X, Y, and Z components.\n * Assumes that quaternion is 1 unit in length.\n * Any existing W component will be ignored.\n *\n * @param {quat} out the receiving quaternion\n * @param {ReadonlyQuat} a quat to calculate W component of\n * @returns {quat} out\n */\nexport function calculateW(out, a) {\n var x = a[0],\n y = a[1],\n z = a[2];\n out[0] = x;\n out[1] = y;\n out[2] = z;\n out[3] = Math.sqrt(Math.abs(1.0 - x * x - y * y - z * z));\n return out;\n}\n\n/**\n * Calculate the exponential of a unit quaternion.\n *\n * @param {quat} out the receiving quaternion\n * @param {ReadonlyQuat} a quat to calculate the exponential of\n * @returns {quat} out\n */\nexport function exp(out, a) {\n var x = a[0],\n y = a[1],\n z = a[2],\n w = a[3];\n var r = Math.sqrt(x * x + y * y + z * z);\n var et = Math.exp(w);\n var s = r > 0 ? et * Math.sin(r) / r : 0;\n out[0] = x * s;\n out[1] = y * s;\n out[2] = z * s;\n out[3] = et * Math.cos(r);\n return out;\n}\n\n/**\n * Calculate the natural logarithm of a unit quaternion.\n *\n * @param {quat} out the receiving quaternion\n * @param {ReadonlyQuat} a quat to calculate the exponential of\n * @returns {quat} out\n */\nexport function ln(out, a) {\n var x = a[0],\n y = a[1],\n z = a[2],\n w = a[3];\n var r = Math.sqrt(x * x + y * y + z * z);\n var t = r > 0 ? Math.atan2(r, w) / r : 0;\n out[0] = x * t;\n out[1] = y * t;\n out[2] = z * t;\n out[3] = 0.5 * Math.log(x * x + y * y + z * z + w * w);\n return out;\n}\n\n/**\n * Calculate the scalar power of a unit quaternion.\n *\n * @param {quat} out the receiving quaternion\n * @param {ReadonlyQuat} a quat to calculate the exponential of\n * @param {Number} b amount to scale the quaternion by\n * @returns {quat} out\n */\nexport function pow(out, a, b) {\n ln(out, a);\n scale(out, out, b);\n exp(out, out);\n return out;\n}\n\n/**\n * Performs a spherical linear interpolation between two quat\n *\n * @param {quat} out the receiving quaternion\n * @param {ReadonlyQuat} a the first operand\n * @param {ReadonlyQuat} b the second operand\n * @param {Number} t interpolation amount, in the range [0-1], between the two inputs\n * @returns {quat} out\n */\nexport function slerp(out, a, b, t) {\n // benchmarks:\n // http://jsperf.com/quaternion-slerp-implementations\n var ax = a[0],\n ay = a[1],\n az = a[2],\n aw = a[3];\n var bx = b[0],\n by = b[1],\n bz = b[2],\n bw = b[3];\n var omega, cosom, sinom, scale0, scale1;\n\n // calc cosine\n cosom = ax * bx + ay * by + az * bz + aw * bw;\n // adjust signs (if necessary)\n if (cosom < 0.0) {\n cosom = -cosom;\n bx = -bx;\n by = -by;\n bz = -bz;\n bw = -bw;\n }\n // calculate coefficients\n if (1.0 - cosom > glMatrix.EPSILON) {\n // standard case (slerp)\n omega = Math.acos(cosom);\n sinom = Math.sin(omega);\n scale0 = Math.sin((1.0 - t) * omega) / sinom;\n scale1 = Math.sin(t * omega) / sinom;\n } else {\n // \"from\" and \"to\" quaternions are very close\n // ... so we can do a linear interpolation\n scale0 = 1.0 - t;\n scale1 = t;\n }\n // calculate final values\n out[0] = scale0 * ax + scale1 * bx;\n out[1] = scale0 * ay + scale1 * by;\n out[2] = scale0 * az + scale1 * bz;\n out[3] = scale0 * aw + scale1 * bw;\n return out;\n}\n\n/**\n * Generates a random unit quaternion\n *\n * @param {quat} out the receiving quaternion\n * @returns {quat} out\n */\nexport function random(out) {\n // Implementation of http://planning.cs.uiuc.edu/node198.html\n // TODO: Calling random 3 times is probably not the fastest solution\n var u1 = glMatrix.RANDOM();\n var u2 = glMatrix.RANDOM();\n var u3 = glMatrix.RANDOM();\n var sqrt1MinusU1 = Math.sqrt(1 - u1);\n var sqrtU1 = Math.sqrt(u1);\n out[0] = sqrt1MinusU1 * Math.sin(2.0 * Math.PI * u2);\n out[1] = sqrt1MinusU1 * Math.cos(2.0 * Math.PI * u2);\n out[2] = sqrtU1 * Math.sin(2.0 * Math.PI * u3);\n out[3] = sqrtU1 * Math.cos(2.0 * Math.PI * u3);\n return out;\n}\n\n/**\n * Calculates the inverse of a quat\n *\n * @param {quat} out the receiving quaternion\n * @param {ReadonlyQuat} a quat to calculate inverse of\n * @returns {quat} out\n */\nexport function invert(out, a) {\n var a0 = a[0],\n a1 = a[1],\n a2 = a[2],\n a3 = a[3];\n var dot = a0 * a0 + a1 * a1 + a2 * a2 + a3 * a3;\n var invDot = dot ? 1.0 / dot : 0;\n\n // TODO: Would be faster to return [0,0,0,0] immediately if dot == 0\n\n out[0] = -a0 * invDot;\n out[1] = -a1 * invDot;\n out[2] = -a2 * invDot;\n out[3] = a3 * invDot;\n return out;\n}\n\n/**\n * Calculates the conjugate of a quat\n * If the quaternion is normalized, this function is faster than quat.inverse and produces the same result.\n *\n * @param {quat} out the receiving quaternion\n * @param {ReadonlyQuat} a quat to calculate conjugate of\n * @returns {quat} out\n */\nexport function conjugate(out, a) {\n out[0] = -a[0];\n out[1] = -a[1];\n out[2] = -a[2];\n out[3] = a[3];\n return out;\n}\n\n/**\n * Creates a quaternion from the given 3x3 rotation matrix.\n *\n * NOTE: The resultant quaternion is not normalized, so you should be sure\n * to renormalize the quaternion yourself where necessary.\n *\n * @param {quat} out the receiving quaternion\n * @param {ReadonlyMat3} m rotation matrix\n * @returns {quat} out\n * @function\n */\nexport function fromMat3(out, m) {\n // Algorithm in Ken Shoemake's article in 1987 SIGGRAPH course notes\n // article \"Quaternion Calculus and Fast Animation\".\n var fTrace = m[0] + m[4] + m[8];\n var fRoot;\n if (fTrace > 0.0) {\n // |w| > 1/2, may as well choose w > 1/2\n fRoot = Math.sqrt(fTrace + 1.0); // 2w\n out[3] = 0.5 * fRoot;\n fRoot = 0.5 / fRoot; // 1/(4w)\n out[0] = (m[5] - m[7]) * fRoot;\n out[1] = (m[6] - m[2]) * fRoot;\n out[2] = (m[1] - m[3]) * fRoot;\n } else {\n // |w| <= 1/2\n var i = 0;\n if (m[4] > m[0]) i = 1;\n if (m[8] > m[i * 3 + i]) i = 2;\n var j = (i + 1) % 3;\n var k = (i + 2) % 3;\n fRoot = Math.sqrt(m[i * 3 + i] - m[j * 3 + j] - m[k * 3 + k] + 1.0);\n out[i] = 0.5 * fRoot;\n fRoot = 0.5 / fRoot;\n out[3] = (m[j * 3 + k] - m[k * 3 + j]) * fRoot;\n out[j] = (m[j * 3 + i] + m[i * 3 + j]) * fRoot;\n out[k] = (m[k * 3 + i] + m[i * 3 + k]) * fRoot;\n }\n return out;\n}\n\n/**\n * Creates a quaternion from the given euler angle x, y, z using the provided intrinsic order for the conversion.\n *\n * @param {quat} out the receiving quaternion\n * @param {Number} x Angle to rotate around X axis in degrees.\n * @param {Number} y Angle to rotate around Y axis in degrees.\n * @param {Number} z Angle to rotate around Z axis in degrees.\n * @param {'xyz'|'xzy'|'yxz'|'yzx'|'zxy'|'zyx'} order Intrinsic order for conversion, default is zyx.\n * @returns {quat} out\n * @function\n */\nexport function fromEuler(out, x, y, z) {\n var order = arguments.length > 4 && arguments[4] !== undefined ? arguments[4] : glMatrix.ANGLE_ORDER;\n var halfToRad = Math.PI / 360;\n x *= halfToRad;\n z *= halfToRad;\n y *= halfToRad;\n var sx = Math.sin(x);\n var cx = Math.cos(x);\n var sy = Math.sin(y);\n var cy = Math.cos(y);\n var sz = Math.sin(z);\n var cz = Math.cos(z);\n switch (order) {\n case \"xyz\":\n out[0] = sx * cy * cz + cx * sy * sz;\n out[1] = cx * sy * cz - sx * cy * sz;\n out[2] = cx * cy * sz + sx * sy * cz;\n out[3] = cx * cy * cz - sx * sy * sz;\n break;\n case \"xzy\":\n out[0] = sx * cy * cz - cx * sy * sz;\n out[1] = cx * sy * cz - sx * cy * sz;\n out[2] = cx * cy * sz + sx * sy * cz;\n out[3] = cx * cy * cz + sx * sy * sz;\n break;\n case \"yxz\":\n out[0] = sx * cy * cz + cx * sy * sz;\n out[1] = cx * sy * cz - sx * cy * sz;\n out[2] = cx * cy * sz - sx * sy * cz;\n out[3] = cx * cy * cz + sx * sy * sz;\n break;\n case \"yzx\":\n out[0] = sx * cy * cz + cx * sy * sz;\n out[1] = cx * sy * cz + sx * cy * sz;\n out[2] = cx * cy * sz - sx * sy * cz;\n out[3] = cx * cy * cz - sx * sy * sz;\n break;\n case \"zxy\":\n out[0] = sx * cy * cz - cx * sy * sz;\n out[1] = cx * sy * cz + sx * cy * sz;\n out[2] = cx * cy * sz + sx * sy * cz;\n out[3] = cx * cy * cz - sx * sy * sz;\n break;\n case \"zyx\":\n out[0] = sx * cy * cz - cx * sy * sz;\n out[1] = cx * sy * cz + sx * cy * sz;\n out[2] = cx * cy * sz - sx * sy * cz;\n out[3] = cx * cy * cz + sx * sy * sz;\n break;\n default:\n throw new Error('Unknown angle order ' + order);\n }\n return out;\n}\n\n/**\n * Returns a string representation of a quaternion\n *\n * @param {ReadonlyQuat} a vector to represent as a string\n * @returns {String} string representation of the vector\n */\nexport function str(a) {\n return \"quat(\" + a[0] + \", \" + a[1] + \", \" + a[2] + \", \" + a[3] + \")\";\n}\n\n/**\n * Creates a new quat initialized with values from an existing quaternion\n *\n * @param {ReadonlyQuat} a quaternion to clone\n * @returns {quat} a new quaternion\n * @function\n */\nexport var clone = vec4.clone;\n\n/**\n * Creates a new quat initialized with the given values\n *\n * @param {Number} x X component\n * @param {Number} y Y component\n * @param {Number} z Z component\n * @param {Number} w W component\n * @returns {quat} a new quaternion\n * @function\n */\nexport var fromValues = vec4.fromValues;\n\n/**\n * Copy the values from one quat to another\n *\n * @param {quat} out the receiving quaternion\n * @param {ReadonlyQuat} a the source quaternion\n * @returns {quat} out\n * @function\n */\nexport var copy = vec4.copy;\n\n/**\n * Set the components of a quat to the given values\n *\n * @param {quat} out the receiving quaternion\n * @param {Number} x X component\n * @param {Number} y Y component\n * @param {Number} z Z component\n * @param {Number} w W component\n * @returns {quat} out\n * @function\n */\nexport var set = vec4.set;\n\n/**\n * Adds two quat's\n *\n * @param {quat} out the receiving quaternion\n * @param {ReadonlyQuat} a the first operand\n * @param {ReadonlyQuat} b the second operand\n * @returns {quat} out\n * @function\n */\nexport var add = vec4.add;\n\n/**\n * Alias for {@link quat.multiply}\n * @function\n */\nexport var mul = multiply;\n\n/**\n * Scales a quat by a scalar number\n *\n * @param {quat} out the receiving vector\n * @param {ReadonlyQuat} a the vector to scale\n * @param {Number} b amount to scale the vector by\n * @returns {quat} out\n * @function\n */\nexport var scale = vec4.scale;\n\n/**\n * Calculates the dot product of two quat's\n *\n * @param {ReadonlyQuat} a the first operand\n * @param {ReadonlyQuat} b the second operand\n * @returns {Number} dot product of a and b\n * @function\n */\nexport var dot = vec4.dot;\n\n/**\n * Performs a linear interpolation between two quat's\n *\n * @param {quat} out the receiving quaternion\n * @param {ReadonlyQuat} a the first operand\n * @param {ReadonlyQuat} b the second operand\n * @param {Number} t interpolation amount, in the range [0-1], between the two inputs\n * @returns {quat} out\n * @function\n */\nexport var lerp = vec4.lerp;\n\n/**\n * Calculates the length of a quat\n *\n * @param {ReadonlyQuat} a vector to calculate length of\n * @returns {Number} length of a\n */\nexport var length = vec4.length;\n\n/**\n * Alias for {@link quat.length}\n * @function\n */\nexport var len = length;\n\n/**\n * Calculates the squared length of a quat\n *\n * @param {ReadonlyQuat} a vector to calculate squared length of\n * @returns {Number} squared length of a\n * @function\n */\nexport var squaredLength = vec4.squaredLength;\n\n/**\n * Alias for {@link quat.squaredLength}\n * @function\n */\nexport var sqrLen = squaredLength;\n\n/**\n * Normalize a quat\n *\n * @param {quat} out the receiving quaternion\n * @param {ReadonlyQuat} a quaternion to normalize\n * @returns {quat} out\n * @function\n */\nexport var normalize = vec4.normalize;\n\n/**\n * Returns whether or not the quaternions have exactly the same elements in the same position (when compared with ===)\n *\n * @param {ReadonlyQuat} a The first quaternion.\n * @param {ReadonlyQuat} b The second quaternion.\n * @returns {Boolean} True if the vectors are equal, false otherwise.\n */\nexport var exactEquals = vec4.exactEquals;\n\n/**\n * Returns whether or not the quaternions point approximately to the same direction.\n *\n * Both quaternions are assumed to be unit length.\n *\n * @param {ReadonlyQuat} a The first unit quaternion.\n * @param {ReadonlyQuat} b The second unit quaternion.\n * @returns {Boolean} True if the quaternions are equal, false otherwise.\n */\nexport function equals(a, b) {\n return Math.abs(vec4.dot(a, b)) >= 1 - glMatrix.EPSILON;\n}\n\n/**\n * Sets a quaternion to represent the shortest rotation from one\n * vector to another.\n *\n * Both vectors are assumed to be unit length.\n *\n * @param {quat} out the receiving quaternion.\n * @param {ReadonlyVec3} a the initial vector\n * @param {ReadonlyVec3} b the destination vector\n * @returns {quat} out\n */\nexport var rotationTo = function () {\n var tmpvec3 = vec3.create();\n var xUnitVec3 = vec3.fromValues(1, 0, 0);\n var yUnitVec3 = vec3.fromValues(0, 1, 0);\n return function (out, a, b) {\n var dot = vec3.dot(a, b);\n if (dot < -0.999999) {\n vec3.cross(tmpvec3, xUnitVec3, a);\n if (vec3.len(tmpvec3) < 0.000001) vec3.cross(tmpvec3, yUnitVec3, a);\n vec3.normalize(tmpvec3, tmpvec3);\n setAxisAngle(out, tmpvec3, Math.PI);\n return out;\n } else if (dot > 0.999999) {\n out[0] = 0;\n out[1] = 0;\n out[2] = 0;\n out[3] = 1;\n return out;\n } else {\n vec3.cross(tmpvec3, a, b);\n out[0] = tmpvec3[0];\n out[1] = tmpvec3[1];\n out[2] = tmpvec3[2];\n out[3] = 1 + dot;\n return normalize(out, out);\n }\n };\n}();\n\n/**\n * Performs a spherical linear interpolation with two control points\n *\n * @param {quat} out the receiving quaternion\n * @param {ReadonlyQuat} a the first operand\n * @param {ReadonlyQuat} b the second operand\n * @param {ReadonlyQuat} c the third operand\n * @param {ReadonlyQuat} d the fourth operand\n * @param {Number} t interpolation amount, in the range [0-1], between the two inputs\n * @returns {quat} out\n */\nexport var sqlerp = function () {\n var temp1 = create();\n var temp2 = create();\n return function (out, a, b, c, d, t) {\n slerp(temp1, a, d, t);\n slerp(temp2, b, c, t);\n slerp(out, temp1, temp2, 2 * t * (1 - t));\n return out;\n };\n}();\n\n/**\n * Sets the specified quaternion with values corresponding to the given\n * axes. Each axis is a vec3 and is expected to be unit length and\n * perpendicular to all other specified axes.\n *\n * @param {ReadonlyVec3} view the vector representing the viewing direction\n * @param {ReadonlyVec3} right the vector representing the local \"right\" direction\n * @param {ReadonlyVec3} up the vector representing the local \"up\" direction\n * @returns {quat} out\n */\nexport var setAxes = function () {\n var matr = mat3.create();\n return function (out, view, right, up) {\n matr[0] = right[0];\n matr[3] = right[1];\n matr[6] = right[2];\n matr[1] = up[0];\n matr[4] = up[1];\n matr[7] = up[2];\n matr[2] = -view[0];\n matr[5] = -view[1];\n matr[8] = -view[2];\n return normalize(out, fromMat3(out, matr));\n };\n}();","import * as glMatrix from \"./common.js\";\n\n/**\n * 2 Dimensional Vector\n * @module vec2\n */\n\n/**\n * Creates a new, empty vec2\n *\n * @returns {vec2} a new 2D vector\n */\nexport function create() {\n var out = new glMatrix.ARRAY_TYPE(2);\n if (glMatrix.ARRAY_TYPE != Float32Array) {\n out[0] = 0;\n out[1] = 0;\n }\n return out;\n}\n\n/**\n * Creates a new vec2 initialized with values from an existing vector\n *\n * @param {ReadonlyVec2} a vector to clone\n * @returns {vec2} a new 2D vector\n */\nexport function clone(a) {\n var out = new glMatrix.ARRAY_TYPE(2);\n out[0] = a[0];\n out[1] = a[1];\n return out;\n}\n\n/**\n * Creates a new vec2 initialized with the given values\n *\n * @param {Number} x X component\n * @param {Number} y Y component\n * @returns {vec2} a new 2D vector\n */\nexport function fromValues(x, y) {\n var out = new glMatrix.ARRAY_TYPE(2);\n out[0] = x;\n out[1] = y;\n return out;\n}\n\n/**\n * Copy the values from one vec2 to another\n *\n * @param {vec2} out the receiving vector\n * @param {ReadonlyVec2} a the source vector\n * @returns {vec2} out\n */\nexport function copy(out, a) {\n out[0] = a[0];\n out[1] = a[1];\n return out;\n}\n\n/**\n * Set the components of a vec2 to the given values\n *\n * @param {vec2} out the receiving vector\n * @param {Number} x X component\n * @param {Number} y Y component\n * @returns {vec2} out\n */\nexport function set(out, x, y) {\n out[0] = x;\n out[1] = y;\n return out;\n}\n\n/**\n * Adds two vec2's\n *\n * @param {vec2} out the receiving vector\n * @param {ReadonlyVec2} a the first operand\n * @param {ReadonlyVec2} b the second operand\n * @returns {vec2} out\n */\nexport function add(out, a, b) {\n out[0] = a[0] + b[0];\n out[1] = a[1] + b[1];\n return out;\n}\n\n/**\n * Subtracts vector b from vector a\n *\n * @param {vec2} out the receiving vector\n * @param {ReadonlyVec2} a the first operand\n * @param {ReadonlyVec2} b the second operand\n * @returns {vec2} out\n */\nexport function subtract(out, a, b) {\n out[0] = a[0] - b[0];\n out[1] = a[1] - b[1];\n return out;\n}\n\n/**\n * Multiplies two vec2's\n *\n * @param {vec2} out the receiving vector\n * @param {ReadonlyVec2} a the first operand\n * @param {ReadonlyVec2} b the second operand\n * @returns {vec2} out\n */\nexport function multiply(out, a, b) {\n out[0] = a[0] * b[0];\n out[1] = a[1] * b[1];\n return out;\n}\n\n/**\n * Divides two vec2's\n *\n * @param {vec2} out the receiving vector\n * @param {ReadonlyVec2} a the first operand\n * @param {ReadonlyVec2} b the second operand\n * @returns {vec2} out\n */\nexport function divide(out, a, b) {\n out[0] = a[0] / b[0];\n out[1] = a[1] / b[1];\n return out;\n}\n\n/**\n * Math.ceil the components of a vec2\n *\n * @param {vec2} out the receiving vector\n * @param {ReadonlyVec2} a vector to ceil\n * @returns {vec2} out\n */\nexport function ceil(out, a) {\n out[0] = Math.ceil(a[0]);\n out[1] = Math.ceil(a[1]);\n return out;\n}\n\n/**\n * Math.floor the components of a vec2\n *\n * @param {vec2} out the receiving vector\n * @param {ReadonlyVec2} a vector to floor\n * @returns {vec2} out\n */\nexport function floor(out, a) {\n out[0] = Math.floor(a[0]);\n out[1] = Math.floor(a[1]);\n return out;\n}\n\n/**\n * Returns the minimum of two vec2's\n *\n * @param {vec2} out the receiving vector\n * @param {ReadonlyVec2} a the first operand\n * @param {ReadonlyVec2} b the second operand\n * @returns {vec2} out\n */\nexport function min(out, a, b) {\n out[0] = Math.min(a[0], b[0]);\n out[1] = Math.min(a[1], b[1]);\n return out;\n}\n\n/**\n * Returns the maximum of two vec2's\n *\n * @param {vec2} out the receiving vector\n * @param {ReadonlyVec2} a the first operand\n * @param {ReadonlyVec2} b the second operand\n * @returns {vec2} out\n */\nexport function max(out, a, b) {\n out[0] = Math.max(a[0], b[0]);\n out[1] = Math.max(a[1], b[1]);\n return out;\n}\n\n/**\n * symmetric round the components of a vec2\n *\n * @param {vec2} out the receiving vector\n * @param {ReadonlyVec2} a vector to round\n * @returns {vec2} out\n */\nexport function round(out, a) {\n out[0] = glMatrix.round(a[0]);\n out[1] = glMatrix.round(a[1]);\n return out;\n}\n\n/**\n * Scales a vec2 by a scalar number\n *\n * @param {vec2} out the receiving vector\n * @param {ReadonlyVec2} a the vector to scale\n * @param {Number} b amount to scale the vector by\n * @returns {vec2} out\n */\nexport function scale(out, a, b) {\n out[0] = a[0] * b;\n out[1] = a[1] * b;\n return out;\n}\n\n/**\n * Adds two vec2's after scaling the second operand by a scalar value\n *\n * @param {vec2} out the receiving vector\n * @param {ReadonlyVec2} a the first operand\n * @param {ReadonlyVec2} b the second operand\n * @param {Number} scale the amount to scale b by before adding\n * @returns {vec2} out\n */\nexport function scaleAndAdd(out, a, b, scale) {\n out[0] = a[0] + b[0] * scale;\n out[1] = a[1] + b[1] * scale;\n return out;\n}\n\n/**\n * Calculates the euclidian distance between two vec2's\n *\n * @param {ReadonlyVec2} a the first operand\n * @param {ReadonlyVec2} b the second operand\n * @returns {Number} distance between a and b\n */\nexport function distance(a, b) {\n var x = b[0] - a[0],\n y = b[1] - a[1];\n return Math.sqrt(x * x + y * y);\n}\n\n/**\n * Calculates the squared euclidian distance between two vec2's\n *\n * @param {ReadonlyVec2} a the first operand\n * @param {ReadonlyVec2} b the second operand\n * @returns {Number} squared distance between a and b\n */\nexport function squaredDistance(a, b) {\n var x = b[0] - a[0],\n y = b[1] - a[1];\n return x * x + y * y;\n}\n\n/**\n * Calculates the length of a vec2\n *\n * @param {ReadonlyVec2} a vector to calculate length of\n * @returns {Number} length of a\n */\nexport function length(a) {\n var x = a[0],\n y = a[1];\n return Math.sqrt(x * x + y * y);\n}\n\n/**\n * Calculates the squared length of a vec2\n *\n * @param {ReadonlyVec2} a vector to calculate squared length of\n * @returns {Number} squared length of a\n */\nexport function squaredLength(a) {\n var x = a[0],\n y = a[1];\n return x * x + y * y;\n}\n\n/**\n * Negates the components of a vec2\n *\n * @param {vec2} out the receiving vector\n * @param {ReadonlyVec2} a vector to negate\n * @returns {vec2} out\n */\nexport function negate(out, a) {\n out[0] = -a[0];\n out[1] = -a[1];\n return out;\n}\n\n/**\n * Returns the inverse of the components of a vec2\n *\n * @param {vec2} out the receiving vector\n * @param {ReadonlyVec2} a vector to invert\n * @returns {vec2} out\n */\nexport function inverse(out, a) {\n out[0] = 1.0 / a[0];\n out[1] = 1.0 / a[1];\n return out;\n}\n\n/**\n * Normalize a vec2\n *\n * @param {vec2} out the receiving vector\n * @param {ReadonlyVec2} a vector to normalize\n * @returns {vec2} out\n */\nexport function normalize(out, a) {\n var x = a[0],\n y = a[1];\n var len = x * x + y * y;\n if (len > 0) {\n //TODO: evaluate use of glm_invsqrt here?\n len = 1 / Math.sqrt(len);\n }\n out[0] = a[0] * len;\n out[1] = a[1] * len;\n return out;\n}\n\n/**\n * Calculates the dot product of two vec2's\n *\n * @param {ReadonlyVec2} a the first operand\n * @param {ReadonlyVec2} b the second operand\n * @returns {Number} dot product of a and b\n */\nexport function dot(a, b) {\n return a[0] * b[0] + a[1] * b[1];\n}\n\n/**\n * Computes the cross product of two vec2's\n * Note that the cross product must by definition produce a 3D vector\n *\n * @param {vec3} out the receiving vector\n * @param {ReadonlyVec2} a the first operand\n * @param {ReadonlyVec2} b the second operand\n * @returns {vec3} out\n */\nexport function cross(out, a, b) {\n var z = a[0] * b[1] - a[1] * b[0];\n out[0] = out[1] = 0;\n out[2] = z;\n return out;\n}\n\n/**\n * Performs a linear interpolation between two vec2's\n *\n * @param {vec2} out the receiving vector\n * @param {ReadonlyVec2} a the first operand\n * @param {ReadonlyVec2} b the second operand\n * @param {Number} t interpolation amount, in the range [0-1], between the two inputs\n * @returns {vec2} out\n */\nexport function lerp(out, a, b, t) {\n var ax = a[0],\n ay = a[1];\n out[0] = ax + t * (b[0] - ax);\n out[1] = ay + t * (b[1] - ay);\n return out;\n}\n\n/**\n * Generates a random vector with the given scale\n *\n * @param {vec2} out the receiving vector\n * @param {Number} [scale] Length of the resulting vector. If omitted, a unit vector will be returned\n * @returns {vec2} out\n */\nexport function random(out, scale) {\n scale = scale === undefined ? 1.0 : scale;\n var r = glMatrix.RANDOM() * 2.0 * Math.PI;\n out[0] = Math.cos(r) * scale;\n out[1] = Math.sin(r) * scale;\n return out;\n}\n\n/**\n * Transforms the vec2 with a mat2\n *\n * @param {vec2} out the receiving vector\n * @param {ReadonlyVec2} a the vector to transform\n * @param {ReadonlyMat2} m matrix to transform with\n * @returns {vec2} out\n */\nexport function transformMat2(out, a, m) {\n var x = a[0],\n y = a[1];\n out[0] = m[0] * x + m[2] * y;\n out[1] = m[1] * x + m[3] * y;\n return out;\n}\n\n/**\n * Transforms the vec2 with a mat2d\n *\n * @param {vec2} out the receiving vector\n * @param {ReadonlyVec2} a the vector to transform\n * @param {ReadonlyMat2d} m matrix to transform with\n * @returns {vec2} out\n */\nexport function transformMat2d(out, a, m) {\n var x = a[0],\n y = a[1];\n out[0] = m[0] * x + m[2] * y + m[4];\n out[1] = m[1] * x + m[3] * y + m[5];\n return out;\n}\n\n/**\n * Transforms the vec2 with a mat3\n * 3rd vector component is implicitly '1'\n *\n * @param {vec2} out the receiving vector\n * @param {ReadonlyVec2} a the vector to transform\n * @param {ReadonlyMat3} m matrix to transform with\n * @returns {vec2} out\n */\nexport function transformMat3(out, a, m) {\n var x = a[0],\n y = a[1];\n out[0] = m[0] * x + m[3] * y + m[6];\n out[1] = m[1] * x + m[4] * y + m[7];\n return out;\n}\n\n/**\n * Transforms the vec2 with a mat4\n * 3rd vector component is implicitly '0'\n * 4th vector component is implicitly '1'\n *\n * @param {vec2} out the receiving vector\n * @param {ReadonlyVec2} a the vector to transform\n * @param {ReadonlyMat4} m matrix to transform with\n * @returns {vec2} out\n */\nexport function transformMat4(out, a, m) {\n var x = a[0];\n var y = a[1];\n out[0] = m[0] * x + m[4] * y + m[12];\n out[1] = m[1] * x + m[5] * y + m[13];\n return out;\n}\n\n/**\n * Rotate a 2D vector\n * @param {vec2} out The receiving vec2\n * @param {ReadonlyVec2} a The vec2 point to rotate\n * @param {ReadonlyVec2} b The origin of the rotation\n * @param {Number} rad The angle of rotation in radians\n * @returns {vec2} out\n */\nexport function rotate(out, a, b, rad) {\n //Translate point to the origin\n var p0 = a[0] - b[0],\n p1 = a[1] - b[1],\n sinC = Math.sin(rad),\n cosC = Math.cos(rad);\n\n //perform rotation and translate to correct position\n out[0] = p0 * cosC - p1 * sinC + b[0];\n out[1] = p0 * sinC + p1 * cosC + b[1];\n return out;\n}\n\n/**\n * Get the smallest angle between two 2D vectors\n * @param {ReadonlyVec2} a The first operand\n * @param {ReadonlyVec2} b The second operand\n * @returns {Number} The angle in radians\n */\nexport function angle(a, b) {\n var ax = a[0],\n ay = a[1],\n bx = b[0],\n by = b[1];\n return Math.abs(Math.atan2(ay * bx - ax * by, ax * bx + ay * by));\n}\n\n/**\n * Get the signed angle in the interval [-pi,pi] between two 2D vectors (positive if `a` is to the right of `b`)\n * \n * @param {ReadonlyVec2} a The first vector\n * @param {ReadonlyVec2} b The second vector\n * @returns {number} The signed angle in radians\n */\nexport function signedAngle(a, b) {\n var ax = a[0],\n ay = a[1],\n bx = b[0],\n by = b[1];\n return Math.atan2(ax * by - ay * bx, ax * bx + ay * by);\n}\n\n/**\n * Set the components of a vec2 to zero\n *\n * @param {vec2} out the receiving vector\n * @returns {vec2} out\n */\nexport function zero(out) {\n out[0] = 0.0;\n out[1] = 0.0;\n return out;\n}\n\n/**\n * Returns a string representation of a vector\n *\n * @param {ReadonlyVec2} a vector to represent as a string\n * @returns {String} string representation of the vector\n */\nexport function str(a) {\n return \"vec2(\" + a[0] + \", \" + a[1] + \")\";\n}\n\n/**\n * Returns whether or not the vectors exactly have the same elements in the same position (when compared with ===)\n *\n * @param {ReadonlyVec2} a The first vector.\n * @param {ReadonlyVec2} b The second vector.\n * @returns {Boolean} True if the vectors are equal, false otherwise.\n */\nexport function exactEquals(a, b) {\n return a[0] === b[0] && a[1] === b[1];\n}\n\n/**\n * Returns whether or not the vectors have approximately the same elements in the same position.\n *\n * @param {ReadonlyVec2} a The first vector.\n * @param {ReadonlyVec2} b The second vector.\n * @returns {Boolean} True if the vectors are equal, false otherwise.\n */\nexport function equals(a, b) {\n var a0 = a[0],\n a1 = a[1];\n var b0 = b[0],\n b1 = b[1];\n return Math.abs(a0 - b0) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a0), Math.abs(b0)) && Math.abs(a1 - b1) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a1), Math.abs(b1));\n}\n\n/**\n * Alias for {@link vec2.length}\n * @function\n */\nexport var len = length;\n\n/**\n * Alias for {@link vec2.subtract}\n * @function\n */\nexport var sub = subtract;\n\n/**\n * Alias for {@link vec2.multiply}\n * @function\n */\nexport var mul = multiply;\n\n/**\n * Alias for {@link vec2.divide}\n * @function\n */\nexport var div = divide;\n\n/**\n * Alias for {@link vec2.distance}\n * @function\n */\nexport var dist = distance;\n\n/**\n * Alias for {@link vec2.squaredDistance}\n * @function\n */\nexport var sqrDist = squaredDistance;\n\n/**\n * Alias for {@link vec2.squaredLength}\n * @function\n */\nexport var sqrLen = squaredLength;\n\n/**\n * Perform some operation over an array of vec2s.\n *\n * @param {Array} a the array of vectors to iterate over\n * @param {Number} stride Number of elements between the start of each vec2. If 0 assumes tightly packed\n * @param {Number} offset Number of elements to skip at the beginning of the array\n * @param {Number} count Number of vec2s to iterate over. If 0 iterates over entire array\n * @param {Function} fn Function to call for each vector in the array\n * @param {Object} [arg] additional argument to pass to fn\n * @returns {Array} a\n * @function\n */\nexport var forEach = function () {\n var vec = create();\n return function (a, stride, offset, count, fn, arg) {\n var i, l;\n if (!stride) {\n stride = 2;\n }\n if (!offset) {\n offset = 0;\n }\n if (count) {\n l = Math.min(count * stride + offset, a.length);\n } else {\n l = a.length;\n }\n for (i = offset; i < l; i += stride) {\n vec[0] = a[i];\n vec[1] = a[i + 1];\n fn(vec, vec, arg);\n a[i] = vec[0];\n a[i + 1] = vec[1];\n }\n return a;\n };\n}();","/**\n * The maximum value of a coordinate in the internal tile coordinate system. Coordinates of\n * all source features normalized to this extent upon load.\n *\n * The value is a consequence of the following:\n *\n * * Vertex buffer store positions as signed 16 bit integers.\n * * One bit is lost for signedness to support tile buffers.\n * * One bit is lost because the line vertex buffer used to pack 1 bit of other data into the int.\n * * One bit is lost to support features extending past the extent on the right edge of the tile.\n * * This leaves us with 2^13 = 8192\n */\nexport const EXTENT = 8192;","import {EXTENT} from '../data/extent';\n\nimport type {OverscaledTileID} from '../tile/tile_id';\n\n/**\n * Converts a pixel value at a the given zoom level to tile units.\n *\n * The shaders mostly calculate everything in tile units so style\n * properties need to be converted from pixels to tile units using this.\n *\n * For example, a translation by 30 pixels at zoom 6.5 will be a\n * translation by pixelsToTileUnits(30, 6.5) tile units.\n *\n * @returns value in tile units\n */\nexport function pixelsToTileUnits(\n tile: {\n tileID: OverscaledTileID;\n tileSize: number;\n },\n pixelValue: number,\n z: number\n): number {\n return pixelValue * (EXTENT / (tile.tileSize * Math.pow(2, z - tile.tileID.overscaledZ)));\n}\n","import Point from '@mapbox/point-geometry';\nimport UnitBezier from '@mapbox/unitbezier';\nimport {isOffscreenCanvasDistorted} from './offscreen_canvas_distorted';\nimport type {Size} from './image';\nimport type {WorkerGlobalScopeInterface} from './web_worker';\nimport {mat3, mat4, quat, vec2, vec3, type vec4} from 'gl-matrix';\nimport {pixelsToTileUnits} from '../source/pixels_to_tile_units';\nimport {type OverscaledTileID} from '../tile/tile_id';\nimport type {Event} from './evented';\n\n/**\n * Ensures that a value is an `Error` instance.\n * If the value is already an `Error`, it is returned as-is.\n * Otherwise, a new `Error` is created from its string representation.\n */\nexport function ensureError(e: unknown): Error {\n if (e instanceof Error) return e;\n return new Error(typeof e === 'string' ? e : String(e));\n}\n\n/**\n * Returns a new 64 bit float vec4 of zeroes.\n */\nexport function createVec4f64(): vec4 { return new Float64Array(4) as any; }\n/**\n * Returns a new 64 bit float vec3 of zeroes.\n */\nexport function createVec3f64(): vec3 { return new Float64Array(3) as any; }\n/**\n * Returns a new 64 bit float mat4 of zeroes.\n */\nexport function createMat4f64(): mat4 { return new Float64Array(16) as any; }\n/**\n * Returns a new 32 bit float mat4 of zeroes.\n */\nexport function createMat4f32(): mat4 { return new Float32Array(16) as any; }\n/**\n * Returns a new 64 bit float mat4 set to identity.\n */\nexport function createIdentityMat4f64(): mat4 {\n const m = new Float64Array(16) as any;\n mat4.identity(m);\n return m;\n}\n/**\n * Returns a new 32 bit float mat4 set to identity.\n */\nexport function createIdentityMat4f32(): mat4 {\n const m = new Float32Array(16) as any;\n mat4.identity(m);\n return m;\n}\n\n/**\n * Returns a translation in tile units that correctly incorporates the view angle and the *-translate and *-translate-anchor properties.\n * @param inViewportPixelUnitsUnits - True when the units accepted by the matrix are in viewport pixels instead of tile units.\n */\nexport function translatePosition(\n transform: { bearingInRadians: number; zoom: number },\n tile: { tileID: OverscaledTileID; tileSize: number },\n translate: [number, number],\n translateAnchor: 'map' | 'viewport',\n inViewportPixelUnitsUnits: boolean = false\n): [number, number] {\n if (!translate[0] && !translate[1]) return [0, 0];\n\n const angle = inViewportPixelUnitsUnits ?\n (translateAnchor === 'map' ? -transform.bearingInRadians : 0) :\n (translateAnchor === 'viewport' ? transform.bearingInRadians : 0);\n\n if (angle) {\n const sinA = Math.sin(angle);\n const cosA = Math.cos(angle);\n translate = [\n translate[0] * cosA - translate[1] * sinA,\n translate[0] * sinA + translate[1] * cosA\n ];\n }\n\n return [\n inViewportPixelUnitsUnits ? translate[0] : pixelsToTileUnits(tile, translate[0], transform.zoom),\n inViewportPixelUnitsUnits ? translate[1] : pixelsToTileUnits(tile, translate[1], transform.zoom)];\n}\n\n/**\n * Returns the signed distance between a point and a plane.\n * @param plane - The plane equation, in the form where the first three components are the normal and the fourth component is the plane's distance from origin along normal.\n * @param point - The point whose distance from plane is returned.\n * @returns Signed distance of the point from the plane. Positive distances are in the half space where the plane normal points to, negative otherwise.\n */\nexport function pointPlaneSignedDistance(\n plane: vec4 | [number, number, number, number],\n point: vec3 | [number, number, number]\n): number {\n return plane[0] * point[0] + plane[1] * point[1] + plane[2] * point[2] + plane[3];\n}\n\n/**\n * Finds an intersection points of three planes. Returns `null` if no such (single) point exists.\n * The planes *must* be in Hessian normal form - their xyz components must form a unit vector.\n */\nexport function threePlaneIntersection(plane0: vec4, plane1: vec4, plane2: vec4): vec3 | null {\n // https://mathworld.wolfram.com/Plane-PlaneIntersection.html\n const det = mat3.determinant([\n plane0[0], plane0[1], plane0[2],\n plane1[0], plane1[1], plane1[2],\n plane2[0], plane2[1], plane2[2]\n ] as mat3);\n if (det === 0) {\n return null;\n }\n const cross12 = vec3.cross([] as any, [plane1[0], plane1[1], plane1[2]], [plane2[0], plane2[1], plane2[2]]);\n const cross20 = vec3.cross([] as any, [plane2[0], plane2[1], plane2[2]], [plane0[0], plane0[1], plane0[2]]);\n const cross01 = vec3.cross([] as any, [plane0[0], plane0[1], plane0[2]], [plane1[0], plane1[1], plane1[2]]);\n const sum = vec3.scale([] as any, cross12, -plane0[3]);\n vec3.add(sum, sum, vec3.scale([] as any, cross20, -plane1[3]));\n vec3.add(sum, sum, vec3.scale([] as any, cross01, -plane2[3]));\n vec3.scale(sum, sum, 1.0 / det);\n return sum;\n}\n\n/**\n * Returns a parameter `t` such that the point obtained by\n * `origin + direction * t` lies on the given plane.\n * If the ray is parallel to the plane, returns null.\n * Returns a negative value if the ray is pointing away from the plane.\n * Direction does not need to be normalized.\n */\nexport function rayPlaneIntersection(origin: vec3, direction: vec3, plane: vec4): number | null {\n const dotOriginPlane = origin[0] * plane[0] + origin[1] * plane[1] + origin[2] * plane[2];\n const dotDirectionPlane = direction[0] * plane[0] + direction[1] * plane[1] + direction[2] * plane[2];\n if (dotDirectionPlane === 0) {\n return null;\n }\n return (-dotOriginPlane -plane[3]) / dotDirectionPlane;\n}\n\n/**\n * Solves a quadratic equation in the form ax^2 + bx + c = 0 and returns its roots in no particular order.\n * Returns null if the equation has no roots or if it has infinitely many roots.\n */\nexport function solveQuadratic(a: number, b: number, c: number): {\n t0: number;\n t1: number;\n} {\n const d = b * b - 4 * a * c;\n if (d < 0 || (a === 0 && b === 0)) {\n return null;\n }\n\n // Uses a more precise solution from the book Ray Tracing Gems, chapter 7.\n // https://www.realtimerendering.com/raytracinggems/rtg/index.html\n const q = -0.5 * (b + Math.sign(b) * Math.sqrt(d));\n if (Math.abs(q) > 1e-12) {\n return {\n t0: c / q,\n t1: q / a\n };\n } else {\n // Use the schoolbook way if q is too small\n return {\n t0: (-b + Math.sqrt(d)) * 0.5 / a,\n t1: (-b + Math.sqrt(d)) * 0.5 / a\n };\n }\n}\n\n/**\n * Returns the angle in radians between two 2D vectors.\n * The angle is signed and describes how much the first vector would need to be be rotated clockwise\n * (assuming X is right and Y is down) so that it points in the same direction as the second vector.\n * @param vec1x - The X component of the first vector.\n * @param vec1y - The Y component of the first vector.\n * @param vec2x - The X component of the second vector.\n * @param vec2y - The Y component of the second vector.\n * @returns The signed angle between the two vectors, in range -PI..PI.\n */\nexport function angleToRotateBetweenVectors2D(vec1x: number, vec1y: number, vec2x: number, vec2y: number): number {\n // Normalize both vectors\n const length1 = Math.sqrt(vec1x * vec1x + vec1y * vec1y);\n const length2 = Math.sqrt(vec2x * vec2x + vec2y * vec2y);\n vec1x /= length1;\n vec1y /= length1;\n vec2x /= length2;\n vec2y /= length2;\n const dot = vec1x * vec2x + vec1y * vec2y;\n const angle = Math.acos(dot);\n // dot second vector with vector to the right of first (-vec1y, vec1x)\n const isVec2RightOfVec1 = (-vec1y * vec2x + vec1x * vec2y) > 0;\n if (isVec2RightOfVec1) {\n return angle;\n } else {\n return -angle;\n }\n}\n\n/**\n * For two angles in degrees, returns how many degrees to add to the first angle in order to obtain the second angle.\n * The returned difference value is always the shorted of the two - its absolute value is never greater than 180°.\n */\nexport function differenceOfAnglesDegrees(degreesA: number, degreesB: number): number {\n const a = mod(degreesA, 360);\n const b = mod(degreesB, 360);\n const diff1 = b - a;\n const diff2 = (b > a) ? (diff1 - 360) : (diff1 + 360);\n if (Math.abs(diff1) < Math.abs(diff2)) {\n return diff1;\n } else {\n return diff2;\n }\n}\n\n/**\n * For two angles in radians, returns how many radians to add to the first angle in order to obtain the second angle.\n * The returned difference value is always the shorted of the two - its absolute value is never greater than PI.\n */\nexport function differenceOfAnglesRadians(degreesA: number, degreesB: number): number {\n const a = mod(degreesA, Math.PI * 2);\n const b = mod(degreesB, Math.PI * 2);\n const diff1 = b - a;\n const diff2 = (b > a) ? (diff1 - Math.PI * 2) : (diff1 + Math.PI * 2);\n if (Math.abs(diff1) < Math.abs(diff2)) {\n return diff1;\n } else {\n return diff2;\n }\n}\n\n/**\n * When given two angles in degrees, returns the angular distance between them - the shorter one of the two possible arcs.\n */\nexport function distanceOfAnglesDegrees(degreesA: number, degreesB: number): number {\n const a = mod(degreesA, 360);\n const b = mod(degreesB, 360);\n return Math.min(\n Math.abs(a - b),\n Math.abs(a - b + 360),\n Math.abs(a - b - 360)\n );\n}\n\n/**\n * When given two angles in radians, returns the angular distance between them - the shorter one of the two possible arcs.\n */\nexport function distanceOfAnglesRadians(radiansA: number, radiansB: number): number {\n const a = mod(radiansA, Math.PI * 2);\n const b = mod(radiansB, Math.PI * 2);\n return Math.min(\n Math.abs(a - b),\n Math.abs(a - b + Math.PI * 2),\n Math.abs(a - b - Math.PI * 2)\n );\n}\n\n/**\n * Modulo function, as opposed to javascript's `%`, which is a remainder.\n * This functions will return positive values, even if the first operand is negative.\n */\nexport function mod(n, m) {\n return ((n % m) + m) % m;\n}\n\n/**\n * Takes a value in *old range*, linearly maps that range to *new range*, and returns the value in that new range.\n * Additionally, if the value is outside *old range*, it is clamped inside it.\n * Also works if one of the ranges is flipped (its `min` being larger than `max`).\n */\nexport function remapSaturate(value: number, oldRangeMin: number, oldRangeMax: number, newRangeMin: number, newRangeMax: number): number {\n const inOldRange = clamp((value - oldRangeMin) / (oldRangeMax - oldRangeMin), 0.0, 1.0);\n return lerp(newRangeMin, newRangeMax, inOldRange);\n}\n\n/**\n * Linearly interpolate between two values, similar to `mix` function from GLSL. No clamping is done.\n * @param a - The first value to interpolate. This value is returned when mix=0.\n * @param b - The second value to interpolate. This value is returned when mix=1.\n * @param mix - The interpolation factor. Range 0..1 interpolates between `a` and `b`, but values outside this range are also accepted.\n */\nexport function lerp(a: number, b: number, mix: number): number {\n return a * (1.0 - mix) + b * mix;\n}\n\n/**\n * For a given collection of 2D points, returns their axis-aligned bounding box,\n * in the format [minX, minY, maxX, maxY].\n */\nexport function getAABB(points: Point[]): [number, number, number, number] {\n let tlX = Infinity;\n let tlY = Infinity;\n let brX = -Infinity;\n let brY = -Infinity;\n\n for (const p of points) {\n tlX = Math.min(tlX, p.x);\n tlY = Math.min(tlY, p.y);\n brX = Math.max(brX, p.x);\n brY = Math.max(brY, p.y);\n }\n\n return [tlX, tlY, brX, brY];\n}\n\n/**\n * For a given set of tile ids, returns the edge tile ids for the bounding box.\n */\nexport function getEdgeTiles(tileIDs: OverscaledTileID[]): Set {\n if (!tileIDs.length) return new Set();\n\n // set a common zoom for calculation (highest zoom) to reproject all tiles to this same zoom\n const targetZ = Math.max(...tileIDs.map(id => id.canonical.z));\n\n // vars to store the min and max tile x/y coordinates for edge finding\n let minX = Infinity, maxX = -Infinity;\n let minY = Infinity, maxY = -Infinity;\n\n // project all tiles to targetZ while maintaining the reference to the original tile\n const projected: Array<{id: OverscaledTileID; x: number; y: number}> = [];\n for (const id of tileIDs) {\n const {x, y, z} = id.canonical;\n const scale = Math.pow(2, targetZ - z);\n const px = x * scale;\n const py = y * scale;\n\n projected.push({id, x: px, y: py});\n\n if (px < minX) minX = px;\n if (px > maxX) maxX = px;\n if (py < minY) minY = py;\n if (py > maxY) maxY = py;\n }\n\n // find edge tiles using the reprojected tile ids\n const edgeTiles: Set = new Set();\n for (const p of projected) {\n if (p.x === minX || p.x === maxX || p.y === minY || p.y === maxY) {\n edgeTiles.add(p.id);\n }\n }\n\n return edgeTiles;\n}\n\n/**\n * Given a value `t` that varies between 0 and 1, return\n * an interpolation function that eases between 0 and 1 in a pleasing\n * cubic in-out fashion.\n */\nexport function easeCubicInOut(t: number): number {\n if (t <= 0) return 0;\n if (t >= 1) return 1;\n const t2 = t * t,\n t3 = t2 * t;\n return 4 * (t < 0.5 ? t3 : 3 * (t - t2) + t3 - 0.75);\n}\n\n/**\n * Given given (x, y), (x1, y1) control points for a bezier curve,\n * return a function that interpolates along that curve.\n *\n * @param p1x - control point 1 x coordinate\n * @param p1y - control point 1 y coordinate\n * @param p2x - control point 2 x coordinate\n * @param p2y - control point 2 y coordinate\n */\nexport function bezier(p1x: number, p1y: number, p2x: number, p2y: number): (t: number) => number {\n const bezier = new UnitBezier(p1x, p1y, p2x, p2y);\n return (t: number) => {\n return bezier.solve(t);\n };\n}\n\n/**\n * A default bezier-curve powered easing function with\n * control points (0.25, 0.1) and (0.25, 1)\n */\nexport const defaultEasing = bezier(0.25, 0.1, 0.25, 1);\n\n/**\n * constrain n to the given range via min + max\n *\n * @param n - value\n * @param min - the minimum value to be returned\n * @param max - the maximum value to be returned\n * @returns the clamped value\n */\nexport function clamp(n: number, min: number, max: number): number {\n return Math.min(max, Math.max(min, n));\n}\n\n/**\n * constrain n to the given range, excluding the minimum, via modular arithmetic\n *\n * @param n - value\n * @param min - the minimum value to be returned, exclusive\n * @param max - the maximum value to be returned, inclusive\n * @returns constrained number\n */\nexport function wrap(n: number, min: number, max: number): number {\n const d = max - min;\n const w = ((n - min) % d + d) % d + min;\n return (w === min) ? max : w;\n}\n\n/**\n * Compute the difference between the keys in one object and the keys\n * in another object.\n *\n * @returns keys difference\n */\nexport function keysDifference(\n obj: {[key: string]: S},\n other: {[key: string]: T}\n): string[] {\n const difference = [];\n for (const i in obj) {\n if (!(i in other)) {\n difference.push(i);\n }\n }\n return difference;\n}\n\n/**\n * Given a destination object and optionally many source objects,\n * copy all properties from the source objects into the destination.\n * The last source object given overrides properties from previous\n * source objects.\n *\n * @param dest - destination object\n * @param sources - sources from which properties are pulled\n */\nexport function extend(dest: T, source: U): T & U;\nexport function extend(dest: T, source1: U, source2: V): T & U & V;\nexport function extend(dest: T, source1: U, source2: V, source3: W): T & U & V & W;\nexport function extend(dest: object, ...sources: any[]): any;\nexport function extend(dest: object, ...sources: any[]): any {\n for (const src of sources) {\n for (const k in src) {\n dest[k] = src[k];\n }\n }\n return dest;\n}\n\n// See https://stackoverflow.com/questions/49401866/all-possible-keys-of-an-union-type\ntype KeysOfUnion = T extends T ? keyof T: never;\n\n/**\n * Given an object and a number of properties as strings, return version\n * of that object with only those properties.\n *\n * @param src - the object\n * @param properties - an array of property names chosen\n * to appear on the resulting object.\n * @returns object with limited properties.\n * @example\n * ```ts\n * let foo = { name: 'Charlie', age: 10 };\n * let justName = pick(foo, ['name']); // justName = { name: 'Charlie' }\n * ```\n */\nexport function pick(src: T, properties: Array>): Partial {\n const result: Partial = {};\n for (const k of properties) {\n if (k in src) {\n result[k] = src[k];\n }\n }\n return result;\n}\n\nlet id = 1;\n\n/**\n * Return a unique numeric id, starting at 1 and incrementing with\n * each call.\n *\n * @returns unique numeric id.\n */\nexport function uniqueId(): number {\n return id++;\n}\n\n/**\n * Return whether a given value is a power of two\n */\nexport function isPowerOfTwo(value: number): boolean {\n return (Math.log(value) / Math.LN2) % 1 === 0;\n}\n\n/**\n * Return the next power of two, or the input value if already a power of two\n */\nexport function nextPowerOfTwo(value: number): number {\n if (value <= 1) return 1;\n return Math.pow(2, Math.ceil(Math.log(value) / Math.LN2));\n}\n\n/**\n * Computes scaling from zoom level.\n */\nexport function zoomScale(zoom: number) { return Math.pow(2, zoom); }\n\n/**\n * Computes zoom level from scaling.\n */\nexport function scaleZoom(scale: number) { return Math.log(scale) / Math.LN2; }\n\n/**\n * Evaluates the snapped zoom level based on zoomSnap. If zoomSnap is 0 or less, the zoom level is returned unchanged.\n * If delta is provided, it performs directional snapping (ceil for zoom-in, floor for zoom-out).\n * @param zoom - The input zoom level\n * @param zoomSnap - The grid interval to snap to, e.g. 1.0 for 1.0 zoom levels, 0.5 for 0.5 zoom levels, etc.\n * @param delta - Optional scroll delta or direction. If positive, snaps up; if negative, snaps down.\n * @returns The snapped zoom level\n */\nexport function evaluateZoomSnap(zoom: number, zoomSnap: number, delta?: number): number {\n if (zoomSnap <= 0) return zoom;\n const inv = 1 / zoomSnap;\n if (delta === undefined || Math.abs(delta) < 1e-10) {\n return Math.round(zoom * inv) / inv;\n }\n return (delta > 0 ? Math.ceil(zoom * inv - 1e-9) : Math.floor(zoom * inv + 1e-10)) / inv;\n}\n\n/**\n * Create an object by mapping all the values of an existing object while\n * preserving their keys.\n */\nexport function mapObject(input: any, iterator: Function, context?: any): any {\n const output = {};\n for (const key in input) {\n output[key] = iterator.call(context || this, input[key], key, input);\n }\n return output;\n}\n\n/**\n * Create an object by filtering out values of an existing object.\n */\nexport function filterObject(input: any, iterator: Function, context?: any): any {\n const output = {};\n for (const key in input) {\n if (iterator.call(context || this, input[key], key, input)) {\n output[key] = input[key];\n }\n }\n return output;\n}\n\n/**\n * Deeply compares two object literals.\n * @param a - first object literal to be compared\n * @param b - second object literal to be compared\n * @returns true if the two object literals are deeply equal, false otherwise\n */\nexport function deepEqual(a?: unknown | null, b?: unknown | null): boolean {\n if (Array.isArray(a)) {\n if (!Array.isArray(b) || a.length !== b.length) return false;\n for (let i = 0; i < a.length; i++) {\n if (!deepEqual(a[i], b[i])) return false;\n }\n return true;\n }\n if (typeof a === 'object' && a !== null && b !== null) {\n if (!(typeof b === 'object')) return false;\n const keys = Object.keys(a);\n if (keys.length !== Object.keys(b).length) return false;\n for (const key in a) {\n if (!deepEqual(a[key], b[key])) return false;\n }\n return true;\n }\n return a === b;\n}\n\n/**\n * Deeply clones two objects.\n */\nexport function clone(input: T): T {\n if (Array.isArray(input)) {\n return input.map(clone) as any as T;\n } else if (typeof input === 'object' && input) {\n return mapObject(input, clone) as T;\n } else {\n return input;\n }\n}\n\n/**\n * Check if two arrays have at least one common element.\n */\nexport function arraysIntersect(a: T[], b: T[]): boolean {\n for (const element of a) {\n if (b.includes(element)) return true;\n }\n return false;\n}\n\n/**\n * Print a warning message to the console and ensure duplicate warning messages\n * are not printed.\n */\nconst warnOnceHistory: {[key: string]: boolean} = {};\n\nexport function warnOnce(message: string): void {\n if (!warnOnceHistory[message]) {\n // console isn't defined in some WebWorkers, see #2558\n if (typeof console !== 'undefined') console.warn(message);\n warnOnceHistory[message] = true;\n }\n}\n\n/**\n * Indicates if the provided Points are in a counter clockwise (true) or clockwise (false) order\n *\n * @returns true for a counter clockwise set of points\n */\n// https://bryceboe.com/2006/10/23/line-segment-intersection-algorithm/\nexport function isCounterClockwise(a: Point, b: Point, c: Point): boolean {\n return (c.y - a.y) * (b.x - a.x) > (b.y - a.y) * (c.x - a.x);\n}\n\n/**\n * For two lines a and b in 2d space, defined by any two points along the lines,\n * find the intersection point, or return null if the lines are parallel\n *\n * @param a1 - First point on line a\n * @param a2 - Second point on line a\n * @param b1 - First point on line b\n * @param b2 - Second point on line b\n *\n * @returns the intersection point of the two lines or null if they are parallel\n */\nexport function findLineIntersection(a1: Point, a2: Point, b1: Point, b2: Point): Point | null {\n const aDeltaY = a2.y - a1.y;\n const aDeltaX = a2.x - a1.x;\n const bDeltaY = b2.y - b1.y;\n const bDeltaX = b2.x - b1.x;\n\n const denominator = (bDeltaY * aDeltaX) - (bDeltaX * aDeltaY);\n\n if (denominator === 0) {\n // Lines are parallel\n return null;\n }\n\n const originDeltaY = a1.y - b1.y;\n const originDeltaX = a1.x - b1.x;\n const aInterpolation = (bDeltaX * originDeltaY - bDeltaY * originDeltaX) / denominator;\n\n // Find intersection by projecting out from origin of first segment\n return new Point(a1.x + (aInterpolation * aDeltaX), a1.y + (aInterpolation * aDeltaY));\n}\n\n/**\n * Converts spherical coordinates to cartesian coordinates.\n *\n * @param spherical - Spherical coordinates, in [radial, azimuthal, polar]\n * @returns cartesian coordinates in [x, y, z]\n */\n\nexport function sphericalToCartesian([r, azimuthal, polar]: [number, number, number]): {\n x: number;\n y: number;\n z: number;\n} {\n // We abstract \"north\"/\"up\" (compass-wise) to be 0° when really this is 90° (π/2):\n // correct for that here\n azimuthal += 90;\n\n // Convert azimuthal and polar angles to radians\n azimuthal *= Math.PI / 180;\n polar *= Math.PI / 180;\n\n return {\n x: r * Math.cos(azimuthal) * Math.sin(polar),\n y: r * Math.sin(azimuthal) * Math.sin(polar),\n z: r * Math.cos(polar)\n };\n}\n\n/**\n * Returns true if the when run in the web-worker context.\n *\n * @returns `true` if the when run in the web-worker context.\n */\nexport function isWorker(self: any): self is WorkerGlobalScopeInterface {\n // @ts-ignore\n return typeof WorkerGlobalScope !== 'undefined' && typeof self !== 'undefined' && self instanceof WorkerGlobalScope;\n}\n\n/**\n * Parses data from 'Cache-Control' headers.\n *\n * @param cacheControl - Value of 'Cache-Control' header\n * @returns object containing parsed header info.\n */\n\nexport function parseCacheControl(cacheControl: string): any {\n // Taken from [Wreck](https://github.com/hapijs/wreck)\n const re = /(?:^|(?:\\s*\\,\\s*))([^\\x00-\\x20\\(\\)<>@\\,;\\:\\\\\"\\/\\[\\]\\?\\=\\{\\}\\x7F]+)(?:\\=(?:([^\\x00-\\x20\\(\\)<>@\\,;\\:\\\\\"\\/\\[\\]\\?\\=\\{\\}\\x7F]+)|(?:\\\"((?:[^\"\\\\]|\\\\.)*)\\\")))?/g;\n\n const header = {};\n cacheControl.replace(re, ($0, $1, $2, $3) => {\n const value = $2 || $3;\n header[$1] = value ? value.toLowerCase() : true;\n return '';\n });\n\n if (header['max-age']) {\n const maxAge = parseInt(header['max-age'], 10);\n if (isNaN(maxAge)) delete header['max-age'];\n else header['max-age'] = maxAge;\n }\n\n return header;\n}\n\nlet _isSafari = null;\n\n/**\n * Returns true when run in WebKit derived browsers.\n * This is used as a workaround for a memory leak in Safari caused by using Transferable objects to\n * transfer data between WebWorkers and the main thread.\n * https://github.com/mapbox/mapbox-gl-js/issues/8771\n *\n * This should be removed once the underlying Safari issue is fixed.\n *\n * @param scope - Since this function is used both on the main thread and WebWorker context,\n * let the calling scope pass in the global scope object.\n * @returns `true` when run in WebKit derived browsers.\n */\nexport function isSafari(scope: any): boolean {\n if (_isSafari == null) {\n const userAgent = scope.navigator ? scope.navigator.userAgent : null;\n _isSafari = !!scope.safari ||\n !!(userAgent && (/\\b(iPad|iPhone|iPod)\\b/.test(userAgent) || (!!userAgent.match('Safari') && !userAgent.match('Chrome'))));\n }\n return _isSafari;\n}\n\nexport function storageAvailable(type: string): boolean {\n try {\n const storage = window[type];\n storage.setItem('_mapbox_test_', 1);\n storage.removeItem('_mapbox_test_');\n return true;\n } catch {\n return false;\n }\n}\n\n// The following methods are from https://developer.mozilla.org/en-US/docs/Web/API/WindowBase64/Base64_encoding_and_decoding#The_Unicode_Problem\n//Unicode compliant base64 encoder for strings\nexport function b64EncodeUnicode(str: string) {\n return btoa(\n encodeURIComponent(str).replace(/%([0-9A-F]{2})/g,\n (match, p1) => {\n return String.fromCharCode(Number('0x' + p1)); //eslint-disable-line\n }\n )\n );\n}\n\n// Unicode compliant decoder for base64-encoded strings\nexport function b64DecodeUnicode(str: string) {\n return decodeURIComponent(atob(str).split('').map((c) => {\n return '%' + ('00' + c.charCodeAt(0).toString(16)).slice(-2); //eslint-disable-line\n }).join(''));\n}\n\nexport function isImageBitmap(image: any): image is ImageBitmap {\n return typeof ImageBitmap !== 'undefined' && image instanceof ImageBitmap;\n}\n\n/**\n * Converts an ArrayBuffer to an ImageBitmap.\n *\n * Used mostly for testing purposes only, because mocking libs don't know how to work with ArrayBuffers, but work\n * perfectly fine with ImageBitmaps. Might also be used for environments (other than testing) not supporting\n * ArrayBuffers.\n *\n * @param data - Data to convert\n * @returns - A promise resolved when the conversion is finished\n */\nexport const arrayBufferToImageBitmap = async (data: ArrayBuffer): Promise => {\n if (data.byteLength === 0) {\n return createImageBitmap(new ImageData(1, 1));\n }\n const blob: Blob = new Blob([new Uint8Array(data)], {type: 'image/png'});\n try {\n return createImageBitmap(blob);\n } catch (e) {\n throw new Error(`Could not load image because of ${ensureError(e).message}. Please make sure to use a supported image type such as PNG or JPEG. Note that SVGs are not supported.`);\n }\n};\n\nconst transparentPngUrl = 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAC0lEQVQYV2NgAAIAAAUAAarVyFEAAAAASUVORK5CYII=';\n\n/**\n * Converts an ArrayBuffer to an HTMLImageElement.\n *\n * Used mostly for testing purposes only, because mocking libs don't know how to work with ArrayBuffers, but work\n * perfectly fine with ImageBitmaps. Might also be used for environments (other than testing) not supporting\n * ArrayBuffers.\n *\n * @param data - Data to convert\n * @returns - A promise resolved when the conversion is finished\n */\nexport const arrayBufferToImage = (data: ArrayBuffer): Promise => {\n return new Promise((resolve, reject) => {\n const img: HTMLImageElement = new Image();\n img.onload = () => {\n resolve(img);\n URL.revokeObjectURL(img.src);\n // prevent image dataURI memory leak in Safari;\n // but don't free the image immediately because it might be uploaded in the next frame\n // https://github.com/mapbox/mapbox-gl-js/issues/10226\n img.onload = null;\n window.requestAnimationFrame(() => img.src = transparentPngUrl);\n };\n img.onerror = () => reject(new Error('Could not load image. Please make sure to use a supported image type such as PNG or JPEG. Note that SVGs are not supported.'));\n const blob: Blob = new Blob([new Uint8Array(data)], {type: 'image/png'});\n img.src = data.byteLength ? URL.createObjectURL(blob) : transparentPngUrl;\n });\n};\n\n/**\n * Computes the webcodecs VideoFrame API options to select a rectangle out of\n * an image and write it into the destination rectangle.\n *\n * Rect (x/y/width/height) select the overlapping rectangle from the source image\n * and layout (offset/stride) write that overlapping rectangle to the correct place\n * in the destination image.\n *\n * Offset is the byte offset in the dest image that the first pixel appears at\n * and stride is the number of bytes to the start of the next row:\n * ┌───────────┐\n * │ dest │\n * │ ┌───┼───────┐\n * │offset→│▓▓▓│ source│\n * │ │▓▓▓│ │\n * │ └───┼───────┘\n * │stride ⇠╌╌╌│\n * │╌╌╌╌╌╌→ │\n * └───────────┘\n *\n * @param image - source image containing a width and height attribute\n * @param x - top-left x coordinate to read from the image\n * @param y - top-left y coordinate to read from the image\n * @param width - width of the rectangle to read from the image\n * @param height - height of the rectangle to read from the image\n * @returns the layout and rect options to pass into VideoFrame API\n */\nfunction computeVideoFrameParameters(image: Size, x: number, y: number, width: number, height: number): VideoFrameCopyToOptions {\n const destRowOffset = Math.max(-x, 0) * 4;\n const firstSourceRow = Math.max(0, y);\n const firstDestRow = firstSourceRow - y;\n const offset = firstDestRow * width * 4 + destRowOffset;\n const stride = width * 4;\n\n const sourceLeft = Math.max(0, x);\n const sourceTop = Math.max(0, y);\n const sourceRight = Math.min(image.width, x + width);\n const sourceBottom = Math.min(image.height, y + height);\n return {\n rect: {\n x: sourceLeft,\n y: sourceTop,\n width: sourceRight - sourceLeft,\n height: sourceBottom - sourceTop\n },\n layout: [{offset, stride}]\n };\n}\n\n/**\n * Reads pixels from an ImageBitmap/Image/canvas using webcodec VideoFrame API.\n *\n * @param data - image, imagebitmap, or canvas to parse\n * @param x - top-left x coordinate to read from the image\n * @param y - top-left y coordinate to read from the image\n * @param width - width of the rectangle to read from the image\n * @param height - height of the rectangle to read from the image\n * @returns a promise containing the parsed RGBA pixel values of the image, or the error if an error occurred\n */\nexport async function readImageUsingVideoFrame(\n image: HTMLImageElement | HTMLCanvasElement | ImageBitmap | OffscreenCanvas,\n x: number, y: number, width: number, height: number\n): Promise {\n if (typeof VideoFrame === 'undefined') {\n throw new Error('VideoFrame not supported');\n }\n const frame = new VideoFrame(image, {timestamp: 0});\n try {\n const format = frame?.format;\n if (!format || !(format.startsWith('BGR') || format.startsWith('RGB'))) {\n throw new Error(`Unrecognized format ${format}`);\n }\n const swapBR = format.startsWith('BGR');\n const result = new Uint8ClampedArray(width * height * 4);\n await frame.copyTo(result, computeVideoFrameParameters(image, x, y, width, height));\n if (swapBR) {\n for (let i = 0; i < result.length; i += 4) {\n const tmp = result[i];\n result[i] = result[i + 2];\n result[i + 2] = tmp;\n }\n }\n return result;\n } finally {\n frame.close();\n }\n}\n\nlet offscreenCanvas: OffscreenCanvas;\nlet offscreenCanvasContext: OffscreenCanvasRenderingContext2D;\n\n/**\n * Reads pixels from an ImageBitmap/Image/canvas using OffscreenCanvas\n *\n * @param data - image, imagebitmap, or canvas to parse\n * @param x - top-left x coordinate to read from the image\n * @param y - top-left y coordinate to read from the image\n * @param width - width of the rectangle to read from the image\n * @param height - height of the rectangle to read from the image\n * @returns a promise containing the parsed RGBA pixel values of the image, or the error if an error occurred\n */\nexport function readImageDataUsingOffscreenCanvas(\n imgBitmap: HTMLImageElement | HTMLCanvasElement | ImageBitmap | OffscreenCanvas,\n x: number, y: number, width: number, height: number\n): Uint8ClampedArray {\n const origWidth = imgBitmap.width;\n const origHeight = imgBitmap.height;\n // Lazily initialize OffscreenCanvas\n if (!offscreenCanvas || !offscreenCanvasContext) {\n // Dem tiles are typically 256x256\n offscreenCanvas = new OffscreenCanvas(origWidth, origHeight);\n offscreenCanvasContext = offscreenCanvas.getContext('2d', {willReadFrequently: true});\n }\n\n offscreenCanvas.width = origWidth;\n offscreenCanvas.height = origHeight;\n\n offscreenCanvasContext.drawImage(imgBitmap, 0, 0, origWidth, origHeight);\n const imgData = offscreenCanvasContext.getImageData(x, y, width, height);\n offscreenCanvasContext.clearRect(0, 0, origWidth, origHeight);\n return imgData.data;\n}\n\n/**\n * Reads RGBA pixels from an preferring OffscreenCanvas, but falling back to VideoFrame if supported and\n * the browser is mangling OffscreenCanvas getImageData results.\n *\n * @param data - image, imagebitmap, or canvas to parse\n * @param x - top-left x coordinate to read from the image\n * @param y - top-left y coordinate to read from the image\n * @param width - width of the rectangle to read from the image\n * @param height - height of the rectangle to read from the image\n * @returns a promise containing the parsed RGBA pixel values of the image\n */\nexport async function getImageData(\n image: HTMLImageElement | HTMLCanvasElement | ImageBitmap | OffscreenCanvas,\n x: number, y: number, width: number, height: number\n): Promise {\n if (isOffscreenCanvasDistorted()) {\n try {\n return await readImageUsingVideoFrame(image, x, y, width, height);\n } catch {\n // fall back to OffscreenCanvas\n }\n }\n return readImageDataUsingOffscreenCanvas(image, x, y, width, height);\n}\n\n/**\n * Allows to unsubscribe from events without the need to store the method reference.\n */\nexport interface Subscription {\n /**\n * Unsubscribes from the event.\n */\n unsubscribe(): void;\n}\n\nexport interface Subscriber {\n addEventListener: typeof window.addEventListener;\n removeEventListener: typeof window.removeEventListener;\n}\n\n/**\n * This method is used in order to register an event listener using a lambda function.\n * The return value will allow unsubscribing from the event, without the need to store the method reference.\n * @param target - The target\n * @param message - The message\n * @param listener - The listener\n * @param options - The options\n * @returns a subscription object that can be used to unsubscribe from the event\n */\nexport function subscribe(target: Subscriber, message: keyof WindowEventMap, listener: (...args: any) => void, options: boolean | AddEventListenerOptions): Subscription {\n target.addEventListener(message, listener, options);\n return {\n unsubscribe: () => {\n target.removeEventListener(message, listener, options);\n }\n };\n}\n\n/**\n * This method converts degrees to radians.\n * The return value is the radian value.\n * @param degrees - The number of degrees\n * @returns radians\n */\nexport function degreesToRadians(degrees: number): number {\n return degrees * Math.PI / 180;\n}\n\n/**\n * This method converts radians to degrees.\n * The return value is the degrees value.\n * @param degrees - The number of radians\n * @returns degrees\n */\nexport function radiansToDegrees(degrees: number): number {\n return degrees / Math.PI * 180;\n}\n\nexport type RollPitchBearing = {\n roll: number;\n pitch: number;\n bearing: number;\n};\n\nexport function rollPitchBearingEqual(a: RollPitchBearing, b: RollPitchBearing): boolean {\n return a.roll == b.roll && a.pitch == b.pitch && a.bearing == b.bearing;\n}\n\n/**\n * This method converts a rotation quaternion to roll, pitch, and bearing angles in degrees.\n * @param rotation - The rotation quaternion\n * @returns roll, pitch, and bearing angles in degrees\n */\nexport function getRollPitchBearing(rotation: quat): RollPitchBearing {\n const m: mat3 = new Float64Array(9) as any;\n mat3.fromQuat(m, rotation);\n\n const xAngle = radiansToDegrees(-Math.asin(clamp(m[2], -1, 1)));\n let roll: number;\n let bearing: number;\n if (Math.hypot(m[5], m[8]) < 1.0e-3) {\n roll = 0.0;\n bearing = -radiansToDegrees(Math.atan2(m[3], m[4]));\n } else {\n roll = radiansToDegrees((m[5] === 0.0 && m[8] === 0.0) ? 0.0 : Math.atan2(m[5], m[8]));\n bearing = radiansToDegrees((m[1] === 0.0 && m[0] === 0.0) ? 0.0 : Math.atan2(m[1], m[0]));\n }\n\n return {roll, pitch: xAngle + 90.0, bearing};\n}\n\nexport function getAngleDelta(lastPoint: Point, currentPoint: Point, center: Point): number {\n const pointVect = vec2.fromValues(currentPoint.x - center.x, currentPoint.y - center.y);\n const lastPointVec = vec2.fromValues(lastPoint.x - center.x, lastPoint.y - center.y);\n\n const crossProduct = pointVect[0] * lastPointVec[1] - pointVect[1] * lastPointVec[0];\n const angleRadians = Math.atan2(crossProduct, vec2.dot(pointVect, lastPointVec));\n return radiansToDegrees(angleRadians);\n}\n\n/**\n * This method converts roll, pitch, and bearing angles in degrees to a rotation quaternion.\n * @param roll - Roll angle in degrees\n * @param pitch - Pitch angle in degrees\n * @param bearing - Bearing angle in degrees\n * @returns The rotation quaternion\n */\nexport function rollPitchBearingToQuat(roll: number, pitch: number, bearing: number): quat {\n const rotation: quat = new Float64Array(4) as any;\n quat.fromEuler(rotation, roll, pitch - 90.0, bearing);\n return rotation;\n}\n\n/**\n * Makes optional keys required and add the the undefined type.\n *\n * ```\n * interface Test {\n * foo: number;\n * bar?: number;\n * baz: number | undefined;\n * }\n *\n * Complete {\n * foo: number;\n * bar: number | undefined;\n * baz: number | undefined;\n * }\n *\n * ```\n *\n * See https://medium.com/terria/typescript-transforming-optional-properties-to-required-properties-that-may-be-undefined-7482cb4e1585\n */\n\nexport type Complete = {\n [P in keyof Required]: Pick extends Required> ? T[P] : (T[P] | undefined);\n};\n\n/**\n * A helper to allow require of at least one property\n */\nexport type RequireAtLeastOne = { [K in keyof T]-?: Required> & Partial>>; }[keyof T];\n\n/**\n* A helper to allow require exactly one one property\n */\nexport type ExactlyOne = {\n [K in Keys]: Required> & { [P in Exclude]?: never }\n}[Keys];\n\nexport type TileJSON = {\n tilejson: '2.2.0' | '2.1.0' | '2.0.1' | '2.0.0' | '1.0.0';\n name?: string;\n description?: string;\n version?: string;\n attribution?: string;\n template?: string;\n tiles: string[];\n grids?: string[];\n data?: string[];\n minzoom?: number;\n maxzoom?: number;\n bounds?: [number, number, number, number];\n center?: [number, number, number];\n vector_layers: [{id: string}]; // this is partial but enough for what we need\n};\n\n/**\n * The maximum world tile zoom (Z).\n * In other words, the upper bound supported for tile zoom.\n */\nexport const MAX_TILE_ZOOM = 25;\n\n/**\n * The minimum world tile zoom (Z).\n * In other words, the lower bound supported for tile zoom.\n */\nexport const MIN_TILE_ZOOM = 0;\n\nexport const MAX_VALID_LATITUDE = 85.051129;\n\nconst touchableEvents = {\n touchstart: true,\n touchmove: true,\n touchmoveWindow: true,\n touchend: true,\n touchcancel: true\n};\n\nconst pointableEvents = {\n dblclick: true,\n click: true,\n mouseover: true,\n mouseout: true,\n mousedown: true,\n mousemove: true,\n mousemoveWindow: true,\n mouseup: true,\n mouseupWindow: true,\n contextmenu: true,\n wheel: true\n};\n\nexport function isTouchableEvent(event: Event, eventType: string): event is TouchEvent {\n return touchableEvents[eventType] && 'touches' in event;\n}\n\n/**\n * Checks if an event is a pointable event (mouse or wheel event).\n * Uses the event target's window context for cross-window support.\n */\nexport function isPointableEvent(event: Event, eventType: string): event is MouseEvent {\n if (!pointableEvents[eventType]) return false;\n\n // Get the window context from the event target to use the correct constructor.\n const domEvent = event as globalThis.Event;\n const target = domEvent?.target as Element | null;\n const targetWindow = target?.ownerDocument?.defaultView || window;\n return domEvent instanceof targetWindow.MouseEvent || domEvent instanceof targetWindow.WheelEvent;\n}\n\nexport function isTouchableOrPointableType(eventType: string): boolean {\n return touchableEvents[eventType] || pointableEvents[eventType];\n}\n","/**\n * An error message to use when an operation is aborted\n */\nexport const ABORT_ERROR = 'AbortError';\n\nexport class AbortError extends Error {\n name = ABORT_ERROR;\n\n constructor(messageOrError: string | Error = ABORT_ERROR) {\n super(messageOrError instanceof Error ? messageOrError.message : messageOrError);\n if (messageOrError instanceof Error && messageOrError.stack) {\n this.stack = messageOrError.stack;\n }\n }\n}\n\n/**\n * Check if an error is an abort error\n * @param error - An error object\n * @returns - true if the error is an abort error\n */\nexport function isAbortError(error: unknown): boolean {\n return error instanceof Error && error.name === ABORT_ERROR;\n}\n\n/**\n * Throws an AbortError if the provided abort signal has already been aborted.\n *\n * @param signal - The abort signal to check.\n * @throws AbortError If the signal is aborted.\n */\nexport function throwIfAborted(signal: AbortSignal): void {\n if (signal.aborted) {\n throw new AbortError(signal.reason);\n }\n}\n","import type {RequestParameters, GetResourceResponse} from './ajax';\n\n/**\n * This method type is used to register a protocol handler.\n * Use the abort controller for aborting requests.\n * Return a promise with the relevant resource response.\n */\nexport type AddProtocolAction = (requestParameters: RequestParameters, abortController: AbortController) => Promise>;\n\n/**\n * This is a global config object used to store the configuration\n * It is available in the workers as well.\n * Only serializable data should be stored in it.\n */\ntype Config = {\n MAX_PARALLEL_IMAGE_REQUESTS: number;\n MAX_PARALLEL_IMAGE_REQUESTS_PER_FRAME: number;\n MAX_TILE_CACHE_ZOOM_LEVELS: number;\n REGISTERED_PROTOCOLS: {[x: string]: AddProtocolAction };\n WORKER_URL: string;\n};\n\nexport const config: Config = {\n MAX_PARALLEL_IMAGE_REQUESTS: 16,\n MAX_PARALLEL_IMAGE_REQUESTS_PER_FRAME: 8,\n MAX_TILE_CACHE_ZOOM_LEVELS: 5,\n REGISTERED_PROTOCOLS: {},\n WORKER_URL: ''\n};\n","import {type AddProtocolAction, config} from '../util/config';\n\nexport function getProtocol(url: string) {\n return config.REGISTERED_PROTOCOLS[url.substring(0, url.indexOf('://'))];\n}\n/**\n * Adds a custom load resource function that will be called when using a URL that starts with a custom url schema.\n * This will happen in the main thread, and workers might call it if they don't know how to handle the protocol.\n * The example below will be triggered for custom:// urls defined in the sources list in the style definitions.\n * The function passed will receive the request parameters and should return with the resulting resource,\n * for example a pbf vector tile, non-compressed, represented as ArrayBuffer.\n *\n * @param customProtocol - the protocol to hook, for example 'custom'\n * @param loadFn - the function to use when trying to fetch a tile specified by the customProtocol\n * @example\n * ```ts\n * // This will fetch a file using the fetch API (this is obviously a non interesting example...)\n * addProtocol('custom', async (params, abortController) => {\n * const t = await fetch(`https://${params.url.split(\"://\")[1]}`);\n * if (t.status == 200) {\n * const buffer = await t.arrayBuffer();\n * return {data: buffer}\n * } else {\n * throw new Error(`Tile fetch error: ${t.statusText}`);\n * }\n * });\n * // the following is an example of a way to return an error when trying to load a tile\n * addProtocol('custom2', async (params, abortController) => {\n * throw new Error('someErrorMessage');\n * });\n * ```\n * @see [Add a COG raster source](https://maplibre.org/maplibre-gl-js/docs/examples/add-a-cog-raster-source/)\n * @see [Add Contour Lines](https://maplibre.org/maplibre-gl-js/docs/examples/add-contour-lines/)\n * @see [PMTiles source and protocol](https://maplibre.org/maplibre-gl-js/docs/examples/pmtiles-source-and-protocol/)\n * @see [Use addProtocol to Transform Feature Properties](https://maplibre.org/maplibre-gl-js/docs/examples/use-addprotocol-to-transform-feature-properties/)\n */\nexport function addProtocol(customProtocol: string, loadFn: AddProtocolAction) {\n config.REGISTERED_PROTOCOLS[customProtocol] = loadFn;\n}\n\n/**\n * Removes a previously added protocol in the main thread.\n *\n * @param customProtocol - the custom protocol to remove registration for\n * @example\n * ```ts\n * removeProtocol('custom');\n * ```\n */\nexport function removeProtocol(customProtocol: string) {\n delete config.REGISTERED_PROTOCOLS[customProtocol];\n}\n","import {ensureError, extend, isWorker} from './util';\nimport {AbortError, isAbortError, throwIfAborted} from './abort_error';\nimport {getProtocol} from '../source/protocol_crud';\nimport {MessageType} from './actor_messages';\n\n/**\n * This is used to identify the global dispatcher id when sending a message from the worker without a target map id.\n */\nexport const GLOBAL_DISPATCHER_ID = 'global-dispatcher';\n\n/**\n * A type used to store the tile's expiration date and cache control definition\n */\nexport type ExpiryData = {cacheControl?: string | null; expires?: Date | string | null; etag?: string};\n\n/**\n * A `RequestParameters` object to be returned from Map.options.transformRequest callbacks.\n * @example\n * ```ts\n * // use transformRequest to modify requests that begin with `http://myHost`\n * transformRequest: function(url, resourceType) {\n * if (resourceType === 'Source' && url.indexOf('http://myHost') > -1) {\n * return {\n * url: url.replace('http', 'https'),\n * headers: { 'my-custom-header': true },\n * credentials: 'include' // Include cookies for cross-origin requests\n * }\n * }\n * }\n * ```\n */\nexport type RequestParameters = {\n /**\n * The URL to be requested.\n */\n url: string;\n /**\n * The headers to be sent with the request.\n */\n headers?: any;\n /**\n * Request method `'GET' | 'POST' | 'PUT'`.\n */\n method?: 'GET' | 'POST' | 'PUT';\n /**\n * Request body.\n */\n body?: string;\n /**\n * Response body type to be returned.\n */\n type?: 'string' | 'json' | 'arrayBuffer' | 'image';\n /**\n * `'same-origin'|'include'` Use 'include' to send cookies with cross-origin requests.\n */\n credentials?: 'same-origin' | 'include';\n /**\n * If `true`, Resource Timing API information will be collected for these transformed requests and returned in a resourceTiming property of relevant data events.\n */\n collectResourceTiming?: boolean;\n /**\n * Parameters supported only by browser fetch API. Property of the Request interface contains the cache mode of the request. It controls how the request will interact with the browser's HTTP cache. (https://developer.mozilla.org/en-US/docs/Web/API/Request/cache)\n */\n cache?: RequestCache;\n /**\n * The referrer policy to use for the request. Controls how much referrer information is sent. (https://developer.mozilla.org/en-US/docs/Web/API/Request/referrerPolicy)\n */\n referrerPolicy?: ReferrerPolicy;\n};\n\n/**\n * The response object returned from a successful AJAx request\n */\nexport type GetResourceResponse = ExpiryData & {\n data: T;\n};\n\n/**\n * The response callback used in various places\n */\nexport type ResponseCallback = (\n error?: Error | null,\n data?: T | null,\n cacheControl?: string | null,\n expires?: string | Date | null\n) => void;\n\n/**\n * An error thrown when a HTTP request results in an error response.\n */\nexport class AJAXError extends Error {\n /**\n * The response's HTTP status code.\n */\n status: number;\n\n /**\n * The response's HTTP status text.\n */\n statusText: string;\n\n /**\n * The request's URL.\n */\n url: string;\n\n /**\n * The response's body.\n */\n body: Blob;\n\n /**\n * @param status - The response's HTTP status code.\n * @param statusText - The response's HTTP status text.\n * @param url - The request's URL.\n * @param body - The response's body.\n */\n constructor(status: number, statusText: string, url: string, body: Blob) {\n super(`AJAXError: ${statusText} (${status}): ${url}`);\n this.status = status;\n this.statusText = statusText;\n this.url = url;\n this.body = body;\n }\n}\n\n/**\n * Ensure that we're sending the correct referrer from blob URL worker bundles.\n * For files loaded from the local file system, `location.origin` will be set\n * to the string(!) \"null\" (Firefox), or \"file://\" (Chrome, Safari, Edge),\n * and we will set an empty referrer. Otherwise, we're using the document's URL.\n */\nexport const getReferrer = () => isWorker(self) ?\n self.worker?.referrer :\n (window.location.protocol === 'blob:' ? window.parent : window).location.href;\n\n/**\n * Determines whether a URL is a file:// URL. This is obviously the case if it begins\n * with file://. Relative URLs are also file:// URLs iff the original document was loaded\n * via a file:// URL.\n * @param url - The URL to check\n * @returns `true` if the URL is a file:// URL, `false` otherwise\n */\nconst isFileURL = url => url.startsWith('file:') || (getReferrer()?.startsWith('file:') && !/^\\w+:/.test(url));\n\nasync function makeFetchRequest(requestParameters: RequestParameters, abortController: AbortController): Promise> {\n const request = new Request(requestParameters.url, {\n method: requestParameters.method || 'GET',\n body: requestParameters.body,\n credentials: requestParameters.credentials,\n headers: requestParameters.headers,\n cache: requestParameters.cache,\n referrer: getReferrer(),\n referrerPolicy: requestParameters.referrerPolicy,\n signal: abortController.signal\n });\n\n // If the user has already set an Accept header, do not overwrite it here\n if (requestParameters.type === 'json' && !request.headers.has('Accept')) {\n request.headers.set('Accept', 'application/json');\n }\n\n let response: Response;\n try {\n response = await fetch(request);\n } catch (e) {\n // Pass through AbortErrors for upstream handling\n if (isAbortError(e)) {\n throw e;\n }\n\n // When the error is due to CORS policy, DNS issue or malformed URL, the fetch call does not resolve but throws a generic TypeError instead.\n // It is preferable to throw an AJAXError so that the Map event \"error\" can catch it and still have\n // access to the faulty url. In such case, we provide the arbitrary HTTP error code of `0`.\n throw new AJAXError(0, ensureError(e).message, requestParameters.url, new Blob());\n }\n\n if (!response.ok) {\n const body = await response.blob();\n throw new AJAXError(response.status, response.statusText, requestParameters.url, body);\n }\n let parsePromise: Promise;\n if ((requestParameters.type === 'arrayBuffer' || requestParameters.type === 'image')) {\n parsePromise = response.arrayBuffer();\n } else if (requestParameters.type === 'json') {\n parsePromise = response.json();\n } else {\n parsePromise = response.text();\n }\n const result = await parsePromise;\n throwIfAborted(abortController.signal);\n return {data: result, cacheControl: response.headers.get('Cache-Control'), expires: response.headers.get('Expires'), etag: response.headers.get('ETag')};\n}\n\nfunction makeXMLHttpRequest(requestParameters: RequestParameters, abortController: AbortController): Promise> {\n return new Promise((resolve, reject) => {\n const xhr: XMLHttpRequest = new XMLHttpRequest();\n\n xhr.open(requestParameters.method || 'GET', requestParameters.url, true);\n if (requestParameters.type === 'arrayBuffer' || requestParameters.type === 'image') {\n xhr.responseType = 'arraybuffer';\n }\n for (const k in requestParameters.headers) {\n xhr.setRequestHeader(k, requestParameters.headers[k]);\n }\n if (requestParameters.type === 'json') {\n xhr.responseType = 'text';\n // Do not overwrite the user-provided Accept header\n if (!requestParameters.headers?.Accept) {\n xhr.setRequestHeader('Accept', 'application/json');\n }\n }\n xhr.withCredentials = requestParameters.credentials === 'include';\n xhr.onerror = () => {\n reject(new Error(xhr.statusText));\n };\n xhr.onload = () => {\n if (abortController.signal.aborted) {\n return;\n }\n if (((xhr.status >= 200 && xhr.status < 300) || xhr.status === 0) && xhr.response !== null) {\n let data: unknown = xhr.response;\n if (requestParameters.type === 'json') {\n // We're manually parsing JSON here to get better error messages.\n try {\n data = JSON.parse(xhr.response);\n } catch (err) {\n reject(err);\n return;\n }\n }\n resolve({data, cacheControl: xhr.getResponseHeader('Cache-Control'), expires: xhr.getResponseHeader('Expires'), etag: xhr.getResponseHeader('ETag')});\n } else {\n const body = new Blob([xhr.response], {type: xhr.getResponseHeader('Content-Type')});\n reject(new AJAXError(xhr.status, xhr.statusText, requestParameters.url, body));\n }\n };\n abortController.signal.addEventListener('abort', () => {\n xhr.abort();\n reject(new AbortError(abortController.signal.reason));\n });\n xhr.send(requestParameters.body);\n });\n}\n\n/**\n * We're trying to use the Fetch API if possible. However, requests for resources with the file:// URI scheme don't work with the Fetch API.\n * In this case we unconditionally use XHR on the current thread since referrers don't matter.\n * This method can also use the registered method if `addProtocol` was called.\n * @param requestParameters - The request parameters\n * @param abortController - The abort controller allowing to cancel the request\n * @returns a promise resolving to the response, including cache control and expiry data\n */\nexport const makeRequest = async function(requestParameters: RequestParameters, abortController: AbortController): Promise> {\n if (requestParameters.url.includes('://') && !(/^https?:|^file:/.test(requestParameters.url))) {\n const protocolLoadFn = getProtocol(requestParameters.url);\n if (protocolLoadFn) {\n const response = await protocolLoadFn(requestParameters, abortController);\n if (!response.data && requestParameters.type === 'arrayBuffer') {\n // A successful array buffer request should always return data even if empty\n return extend(response, {data: new ArrayBuffer(0)});\n }\n return response;\n }\n if (isWorker(self) && self.worker?.actor) {\n return self.worker.actor.sendAsync({type: MessageType.getResource, data: requestParameters, targetMapId: GLOBAL_DISPATCHER_ID}, abortController);\n }\n }\n if (!isFileURL(requestParameters.url)) {\n if (fetch && Request && AbortController && Object.hasOwn(Request.prototype, 'signal')) {\n return makeFetchRequest(requestParameters, abortController);\n }\n if (isWorker(self) && self.worker?.actor) {\n return self.worker.actor.sendAsync({type: MessageType.getResource, data: requestParameters, mustQueue: true, targetMapId: GLOBAL_DISPATCHER_ID}, abortController);\n }\n }\n return makeXMLHttpRequest(requestParameters, abortController);\n};\n\nexport const getJSON = (requestParameters: RequestParameters, abortController: AbortController): Promise<{data: T} & ExpiryData> => {\n return makeRequest(extend(requestParameters, {type: 'json'}), abortController);\n};\n\nexport const getArrayBuffer = (requestParameters: RequestParameters, abortController: AbortController): Promise<{data: ArrayBuffer} & ExpiryData> => {\n return makeRequest(extend(requestParameters, {type: 'arrayBuffer'}), abortController);\n};\n\nexport function sameOrigin(inComingUrl: string) {\n // A relative URL \"/foo\" or \"./foo\" will throw exception in URL's ctor,\n // try-catch is expansive so just use a heuristic check to avoid it\n // also check data URL\n if (!inComingUrl ||\n inComingUrl.indexOf('://') <= 0 || // relative URL\n inComingUrl.startsWith('data:image/') || // data image URL\n inComingUrl.startsWith('blob:')) { // blob\n return true;\n }\n const urlObj = new URL(inComingUrl);\n const locationObj = window.location;\n return urlObj.protocol === locationObj.protocol && urlObj.host === locationObj.host;\n}\n\nexport const getVideo = (urls: string[]): Promise => {\n const video: HTMLVideoElement = window.document.createElement('video');\n video.muted = true;\n return new Promise((resolve) => {\n video.onloadstart = () => {\n resolve(video);\n };\n for (const url of urls) {\n const s: HTMLSourceElement = window.document.createElement('source');\n if (!sameOrigin(url)) {\n video.crossOrigin = 'Anonymous';\n }\n s.src = url;\n video.appendChild(s);\n }\n });\n};\n","import {extend, type Subscription} from './util';\n\n/**\n * A listener method used as a callback to events\n */\nexport type Listener = (a: any) => any;\n\ntype Listeners = {[_: string]: Listener[]};\n\nfunction _addEventListener(type: string, listener: Listener, listenerList: Listeners) {\n const listenerExists = listenerList[type]?.includes(listener);\n if (!listenerExists) {\n listenerList[type] ||= [];\n listenerList[type].push(listener);\n }\n}\n\nfunction _removeEventListener(type: string, listener: Listener, listenerList: Listeners) {\n if (listenerList?.[type]) {\n const index = listenerList[type].indexOf(listener);\n if (index !== -1) {\n listenerList[type].splice(index, 1);\n }\n }\n}\n\n/**\n * The event class\n */\nexport class Event {\n readonly type: string;\n\n constructor(type: string, data: any = {}) {\n extend(this, data);\n this.type = type;\n }\n}\n\ntype ErrorLike = {\n message: string;\n};\n\n/**\n * An error event\n */\nexport class ErrorEvent extends Event {\n error: ErrorLike;\n\n constructor(error: ErrorLike, data: any = {}) {\n super('error', extend({error}, data));\n }\n}\n\n/**\n * Methods mixed in to other classes for event capabilities.\n *\n * @group Event Related\n */\nexport class Evented {\n _listeners: Listeners;\n _oneTimeListeners: Listeners;\n _eventedParent: Evented;\n _eventedParentData: any | (() => any);\n\n /**\n * Adds a listener to a specified event type.\n *\n * @param type - The event type to add a listen for.\n * @param listener - The function to be called when the event is fired.\n * The listener function is called with the data object passed to `fire`,\n * extended with `target` and `type` properties.\n */\n on(type: string, listener: Listener): Subscription {\n this._listeners ||= {};\n _addEventListener(type, listener, this._listeners);\n\n return {\n unsubscribe: () => {\n this.off(type, listener);\n }\n };\n }\n\n /**\n * Removes a previously registered event listener.\n *\n * @param type - The event type to remove listeners for.\n * @param listener - The listener function to remove.\n */\n off(type: string, listener: Listener) {\n _removeEventListener(type, listener, this._listeners);\n _removeEventListener(type, listener, this._oneTimeListeners);\n\n return this;\n }\n\n /**\n * Adds a listener that will be called only once to a specified event type.\n *\n * The listener will be called first time the event fires after the listener is registered.\n *\n * @param type - The event type to listen for.\n * @param listener - The function to be called when the event is fired the first time.\n * @returns `this` or a promise if a listener is not provided\n */\n once(type: string, listener?: Listener): this | Promise {\n if (!listener) {\n return new Promise((resolve) => this.once(type, resolve));\n }\n this._oneTimeListeners ||= {};\n _addEventListener(type, listener, this._oneTimeListeners);\n\n return this;\n }\n\n fire(event: Event | string, properties?: any) {\n // Compatibility with (type: string, properties: Object) signature from previous versions.\n // See https://github.com/mapbox/mapbox-gl-js/issues/6522,\n // https://github.com/mapbox/mapbox-gl-draw/issues/766\n if (typeof event === 'string') {\n event = new Event(event, properties || {});\n }\n\n const type = event.type;\n\n if (this.listens(type)) {\n (event as any).target = this;\n\n // make sure adding or removing listeners inside other listeners won't cause an infinite loop\n const listeners = this._listeners?.[type] ? this._listeners[type].slice() : [];\n for (const listener of listeners) {\n listener.call(this, event);\n }\n\n const oneTimeListeners = this._oneTimeListeners?.[type] ? this._oneTimeListeners[type].slice() : [];\n for (const listener of oneTimeListeners) {\n _removeEventListener(type, listener, this._oneTimeListeners);\n listener.call(this, event);\n }\n\n const parent = this._eventedParent;\n if (parent) {\n extend(\n event,\n typeof this._eventedParentData === 'function' ? this._eventedParentData() : this._eventedParentData\n );\n parent.fire(event);\n }\n\n // To ensure that no error events are dropped, print them to the\n // console if they have no listeners.\n } else if (event instanceof ErrorEvent) {\n console.error(event.error);\n }\n\n return this;\n }\n\n /**\n * Returns a true if this instance of Evented or any forwardeed instances of Evented have a listener for the specified type.\n *\n * @param type - The event type\n * @returns `true` if there is at least one registered listener for specified event type, `false` otherwise\n */\n listens(type: string): boolean {\n return (\n (this._listeners?.[type]?.length > 0) ||\n (this._oneTimeListeners?.[type]?.length > 0) ||\n (this._eventedParent?.listens(type))\n );\n }\n\n /**\n * Bubble all events fired by this instance of Evented to this parent instance of Evented.\n */\n setEventedParent(parent?: Evented | null, data?: any | (() => any)) {\n this._eventedParent = parent;\n this._eventedParentData = data;\n\n return this;\n }\n}\n","var $version = 8;\nvar $root = {\n\tversion: {\n\t\trequired: true,\n\t\ttype: \"enum\",\n\t\tvalues: [\n\t\t\t8\n\t\t]\n\t},\n\tname: {\n\t\ttype: \"string\"\n\t},\n\tmetadata: {\n\t\ttype: \"*\"\n\t},\n\tcenter: {\n\t\ttype: \"array\",\n\t\tvalue: \"number\",\n\t\tlength: 2\n\t},\n\tcenterAltitude: {\n\t\ttype: \"number\"\n\t},\n\tzoom: {\n\t\ttype: \"number\"\n\t},\n\tbearing: {\n\t\ttype: \"number\",\n\t\t\"default\": 0,\n\t\tperiod: 360,\n\t\tunits: \"degrees\"\n\t},\n\tpitch: {\n\t\ttype: \"number\",\n\t\t\"default\": 0,\n\t\tunits: \"degrees\"\n\t},\n\troll: {\n\t\ttype: \"number\",\n\t\t\"default\": 0,\n\t\tunits: \"degrees\"\n\t},\n\tstate: {\n\t\ttype: \"state\",\n\t\t\"default\": {\n\t\t}\n\t},\n\tlight: {\n\t\ttype: \"light\"\n\t},\n\tsky: {\n\t\ttype: \"sky\"\n\t},\n\tprojection: {\n\t\ttype: \"projection\"\n\t},\n\tterrain: {\n\t\ttype: \"terrain\"\n\t},\n\tsources: {\n\t\trequired: true,\n\t\ttype: \"sources\"\n\t},\n\tsprite: {\n\t\ttype: \"sprite\"\n\t},\n\tglyphs: {\n\t\ttype: \"string\"\n\t},\n\t\"font-faces\": {\n\t\ttype: \"fontFaces\"\n\t},\n\ttransition: {\n\t\ttype: \"transition\"\n\t},\n\tlayers: {\n\t\trequired: true,\n\t\ttype: \"array\",\n\t\tvalue: \"layer\"\n\t}\n};\nvar sources = {\n\t\"*\": {\n\t\ttype: \"source\"\n\t}\n};\nvar source = [\n\t\"source_vector\",\n\t\"source_raster\",\n\t\"source_raster_dem\",\n\t\"source_geojson\",\n\t\"source_video\",\n\t\"source_image\"\n];\nvar source_vector = {\n\ttype: {\n\t\trequired: true,\n\t\ttype: \"enum\",\n\t\tvalues: {\n\t\t\tvector: {\n\t\t\t}\n\t\t}\n\t},\n\turl: {\n\t\ttype: \"string\"\n\t},\n\ttiles: {\n\t\ttype: \"array\",\n\t\tvalue: \"string\"\n\t},\n\tbounds: {\n\t\ttype: \"array\",\n\t\tvalue: \"number\",\n\t\tlength: 4,\n\t\t\"default\": [\n\t\t\t-180,\n\t\t\t-85.051129,\n\t\t\t180,\n\t\t\t85.051129\n\t\t]\n\t},\n\tscheme: {\n\t\ttype: \"enum\",\n\t\tvalues: {\n\t\t\txyz: {\n\t\t\t},\n\t\t\ttms: {\n\t\t\t}\n\t\t},\n\t\t\"default\": \"xyz\"\n\t},\n\tminzoom: {\n\t\ttype: \"number\",\n\t\t\"default\": 0\n\t},\n\tmaxzoom: {\n\t\ttype: \"number\",\n\t\t\"default\": 22\n\t},\n\tattribution: {\n\t\ttype: \"string\"\n\t},\n\tpromoteId: {\n\t\ttype: \"promoteId\"\n\t},\n\tvolatile: {\n\t\ttype: \"boolean\",\n\t\t\"default\": false\n\t},\n\tencoding: {\n\t\ttype: \"enum\",\n\t\tvalues: {\n\t\t\tmvt: {\n\t\t\t},\n\t\t\tmlt: {\n\t\t\t}\n\t\t},\n\t\t\"default\": \"mvt\"\n\t},\n\t\"*\": {\n\t\ttype: \"*\"\n\t}\n};\nvar source_raster = {\n\ttype: {\n\t\trequired: true,\n\t\ttype: \"enum\",\n\t\tvalues: {\n\t\t\traster: {\n\t\t\t}\n\t\t}\n\t},\n\turl: {\n\t\ttype: \"string\"\n\t},\n\ttiles: {\n\t\ttype: \"array\",\n\t\tvalue: \"string\"\n\t},\n\tbounds: {\n\t\ttype: \"array\",\n\t\tvalue: \"number\",\n\t\tlength: 4,\n\t\t\"default\": [\n\t\t\t-180,\n\t\t\t-85.051129,\n\t\t\t180,\n\t\t\t85.051129\n\t\t]\n\t},\n\tminzoom: {\n\t\ttype: \"number\",\n\t\t\"default\": 0\n\t},\n\tmaxzoom: {\n\t\ttype: \"number\",\n\t\t\"default\": 22\n\t},\n\ttileSize: {\n\t\ttype: \"number\",\n\t\t\"default\": 512,\n\t\tunits: \"pixels\"\n\t},\n\tscheme: {\n\t\ttype: \"enum\",\n\t\tvalues: {\n\t\t\txyz: {\n\t\t\t},\n\t\t\ttms: {\n\t\t\t}\n\t\t},\n\t\t\"default\": \"xyz\"\n\t},\n\tattribution: {\n\t\ttype: \"string\"\n\t},\n\tvolatile: {\n\t\ttype: \"boolean\",\n\t\t\"default\": false\n\t},\n\t\"*\": {\n\t\ttype: \"*\"\n\t}\n};\nvar source_raster_dem = {\n\ttype: {\n\t\trequired: true,\n\t\ttype: \"enum\",\n\t\tvalues: {\n\t\t\t\"raster-dem\": {\n\t\t\t}\n\t\t}\n\t},\n\turl: {\n\t\ttype: \"string\"\n\t},\n\ttiles: {\n\t\ttype: \"array\",\n\t\tvalue: \"string\"\n\t},\n\tbounds: {\n\t\ttype: \"array\",\n\t\tvalue: \"number\",\n\t\tlength: 4,\n\t\t\"default\": [\n\t\t\t-180,\n\t\t\t-85.051129,\n\t\t\t180,\n\t\t\t85.051129\n\t\t]\n\t},\n\tminzoom: {\n\t\ttype: \"number\",\n\t\t\"default\": 0\n\t},\n\tmaxzoom: {\n\t\ttype: \"number\",\n\t\t\"default\": 22\n\t},\n\ttileSize: {\n\t\ttype: \"number\",\n\t\t\"default\": 512,\n\t\tunits: \"pixels\"\n\t},\n\tattribution: {\n\t\ttype: \"string\"\n\t},\n\tencoding: {\n\t\ttype: \"enum\",\n\t\tvalues: {\n\t\t\tterrarium: {\n\t\t\t},\n\t\t\tmapbox: {\n\t\t\t},\n\t\t\tcustom: {\n\t\t\t}\n\t\t},\n\t\t\"default\": \"mapbox\"\n\t},\n\tredFactor: {\n\t\ttype: \"number\",\n\t\t\"default\": 1\n\t},\n\tblueFactor: {\n\t\ttype: \"number\",\n\t\t\"default\": 1\n\t},\n\tgreenFactor: {\n\t\ttype: \"number\",\n\t\t\"default\": 1\n\t},\n\tbaseShift: {\n\t\ttype: \"number\",\n\t\t\"default\": 0\n\t},\n\tvolatile: {\n\t\ttype: \"boolean\",\n\t\t\"default\": false\n\t},\n\t\"*\": {\n\t\ttype: \"*\"\n\t}\n};\nvar source_geojson = {\n\ttype: {\n\t\trequired: true,\n\t\ttype: \"enum\",\n\t\tvalues: {\n\t\t\tgeojson: {\n\t\t\t}\n\t\t}\n\t},\n\tdata: {\n\t\trequired: true,\n\t\ttype: \"*\"\n\t},\n\tmaxzoom: {\n\t\ttype: \"number\",\n\t\t\"default\": 18\n\t},\n\tattribution: {\n\t\ttype: \"string\"\n\t},\n\tbuffer: {\n\t\ttype: \"number\",\n\t\t\"default\": 128,\n\t\tmaximum: 512,\n\t\tminimum: 0\n\t},\n\tfilter: {\n\t\ttype: \"filter\"\n\t},\n\ttolerance: {\n\t\ttype: \"number\",\n\t\t\"default\": 0.375\n\t},\n\tcluster: {\n\t\ttype: \"boolean\",\n\t\t\"default\": false\n\t},\n\tclusterRadius: {\n\t\ttype: \"number\",\n\t\t\"default\": 50,\n\t\tminimum: 0\n\t},\n\tclusterMaxZoom: {\n\t\ttype: \"number\"\n\t},\n\tclusterMinPoints: {\n\t\ttype: \"number\"\n\t},\n\tclusterProperties: {\n\t\ttype: \"*\"\n\t},\n\tlineMetrics: {\n\t\ttype: \"boolean\",\n\t\t\"default\": false\n\t},\n\tgenerateId: {\n\t\ttype: \"boolean\",\n\t\t\"default\": false\n\t},\n\tpromoteId: {\n\t\ttype: \"promoteId\"\n\t}\n};\nvar source_video = {\n\ttype: {\n\t\trequired: true,\n\t\ttype: \"enum\",\n\t\tvalues: {\n\t\t\tvideo: {\n\t\t\t}\n\t\t}\n\t},\n\turls: {\n\t\trequired: true,\n\t\ttype: \"array\",\n\t\tvalue: \"string\"\n\t},\n\tcoordinates: {\n\t\trequired: true,\n\t\ttype: \"array\",\n\t\tlength: 4,\n\t\tvalue: {\n\t\t\ttype: \"array\",\n\t\t\tlength: 2,\n\t\t\tvalue: \"number\"\n\t\t}\n\t}\n};\nvar source_image = {\n\ttype: {\n\t\trequired: true,\n\t\ttype: \"enum\",\n\t\tvalues: {\n\t\t\timage: {\n\t\t\t}\n\t\t}\n\t},\n\turl: {\n\t\trequired: true,\n\t\ttype: \"string\"\n\t},\n\tcoordinates: {\n\t\trequired: true,\n\t\ttype: \"array\",\n\t\tlength: 4,\n\t\tvalue: {\n\t\t\ttype: \"array\",\n\t\t\tlength: 2,\n\t\t\tvalue: \"number\"\n\t\t}\n\t}\n};\nvar layer = {\n\tid: {\n\t\ttype: \"string\",\n\t\trequired: true\n\t},\n\ttype: {\n\t\ttype: \"enum\",\n\t\tvalues: {\n\t\t\tfill: {\n\t\t\t},\n\t\t\tline: {\n\t\t\t},\n\t\t\tsymbol: {\n\t\t\t},\n\t\t\tcircle: {\n\t\t\t},\n\t\t\theatmap: {\n\t\t\t},\n\t\t\t\"fill-extrusion\": {\n\t\t\t},\n\t\t\traster: {\n\t\t\t},\n\t\t\thillshade: {\n\t\t\t},\n\t\t\t\"color-relief\": {\n\t\t\t},\n\t\t\tbackground: {\n\t\t\t}\n\t\t},\n\t\trequired: true\n\t},\n\tmetadata: {\n\t\ttype: \"*\"\n\t},\n\tsource: {\n\t\ttype: \"string\"\n\t},\n\t\"source-layer\": {\n\t\ttype: \"string\"\n\t},\n\tminzoom: {\n\t\ttype: \"number\",\n\t\tminimum: 0,\n\t\tmaximum: 24\n\t},\n\tmaxzoom: {\n\t\ttype: \"number\",\n\t\tminimum: 0,\n\t\tmaximum: 24\n\t},\n\tfilter: {\n\t\ttype: \"filter\"\n\t},\n\tlayout: {\n\t\ttype: \"layout\"\n\t},\n\tpaint: {\n\t\ttype: \"paint\"\n\t}\n};\nvar layout = [\n\t\"layout_fill\",\n\t\"layout_line\",\n\t\"layout_circle\",\n\t\"layout_heatmap\",\n\t\"layout_fill-extrusion\",\n\t\"layout_symbol\",\n\t\"layout_raster\",\n\t\"layout_hillshade\",\n\t\"layout_color-relief\",\n\t\"layout_background\"\n];\nvar layout_background = {\n\tvisibility: {\n\t\ttype: \"enum\",\n\t\tvalues: {\n\t\t\tvisible: {\n\t\t\t},\n\t\t\tnone: {\n\t\t\t}\n\t\t},\n\t\t\"default\": \"visible\",\n\t\texpression: {\n\t\t\tinterpolated: false,\n\t\t\tparameters: [\n\t\t\t\t\"global-state\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-constant\"\n\t}\n};\nvar layout_fill = {\n\t\"fill-sort-key\": {\n\t\ttype: \"number\",\n\t\texpression: {\n\t\t\tinterpolated: false,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\",\n\t\t\t\t\"feature\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-driven\"\n\t},\n\tvisibility: {\n\t\ttype: \"enum\",\n\t\tvalues: {\n\t\t\tvisible: {\n\t\t\t},\n\t\t\tnone: {\n\t\t\t}\n\t\t},\n\t\t\"default\": \"visible\",\n\t\texpression: {\n\t\t\tinterpolated: false,\n\t\t\tparameters: [\n\t\t\t\t\"global-state\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-constant\"\n\t}\n};\nvar layout_circle = {\n\t\"circle-sort-key\": {\n\t\ttype: \"number\",\n\t\texpression: {\n\t\t\tinterpolated: false,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\",\n\t\t\t\t\"feature\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-driven\"\n\t},\n\tvisibility: {\n\t\ttype: \"enum\",\n\t\tvalues: {\n\t\t\tvisible: {\n\t\t\t},\n\t\t\tnone: {\n\t\t\t}\n\t\t},\n\t\t\"default\": \"visible\",\n\t\texpression: {\n\t\t\tinterpolated: false,\n\t\t\tparameters: [\n\t\t\t\t\"global-state\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-constant\"\n\t}\n};\nvar layout_heatmap = {\n\tvisibility: {\n\t\ttype: \"enum\",\n\t\tvalues: {\n\t\t\tvisible: {\n\t\t\t},\n\t\t\tnone: {\n\t\t\t}\n\t\t},\n\t\t\"default\": \"visible\",\n\t\texpression: {\n\t\t\tinterpolated: false,\n\t\t\tparameters: [\n\t\t\t\t\"global-state\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-constant\"\n\t}\n};\nvar layout_line = {\n\t\"line-cap\": {\n\t\ttype: \"enum\",\n\t\tvalues: {\n\t\t\tbutt: {\n\t\t\t},\n\t\t\tround: {\n\t\t\t},\n\t\t\tsquare: {\n\t\t\t}\n\t\t},\n\t\t\"default\": \"butt\",\n\t\texpression: {\n\t\t\tinterpolated: false,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\",\n\t\t\t\t\"feature\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-driven\"\n\t},\n\t\"line-join\": {\n\t\ttype: \"enum\",\n\t\tvalues: {\n\t\t\tbevel: {\n\t\t\t},\n\t\t\tround: {\n\t\t\t},\n\t\t\tmiter: {\n\t\t\t}\n\t\t},\n\t\t\"default\": \"miter\",\n\t\texpression: {\n\t\t\tinterpolated: false,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\",\n\t\t\t\t\"feature\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-driven\"\n\t},\n\t\"line-miter-limit\": {\n\t\ttype: \"number\",\n\t\t\"default\": 2,\n\t\trequires: [\n\t\t\t{\n\t\t\t\t\"line-join\": \"miter\"\n\t\t\t}\n\t\t],\n\t\texpression: {\n\t\t\tinterpolated: true,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\",\n\t\t\t\t\"feature\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-driven\"\n\t},\n\t\"line-round-limit\": {\n\t\ttype: \"number\",\n\t\t\"default\": 1.05,\n\t\trequires: [\n\t\t\t{\n\t\t\t\t\"line-join\": \"round\"\n\t\t\t}\n\t\t],\n\t\texpression: {\n\t\t\tinterpolated: true,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\",\n\t\t\t\t\"feature\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-driven\"\n\t},\n\t\"line-sort-key\": {\n\t\ttype: \"number\",\n\t\texpression: {\n\t\t\tinterpolated: false,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\",\n\t\t\t\t\"feature\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-driven\"\n\t},\n\tvisibility: {\n\t\ttype: \"enum\",\n\t\tvalues: {\n\t\t\tvisible: {\n\t\t\t},\n\t\t\tnone: {\n\t\t\t}\n\t\t},\n\t\t\"default\": \"visible\",\n\t\texpression: {\n\t\t\tinterpolated: false,\n\t\t\tparameters: [\n\t\t\t\t\"global-state\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-constant\"\n\t}\n};\nvar layout_symbol = {\n\t\"symbol-placement\": {\n\t\ttype: \"enum\",\n\t\tvalues: {\n\t\t\tpoint: {\n\t\t\t},\n\t\t\tline: {\n\t\t\t},\n\t\t\t\"line-center\": {\n\t\t\t}\n\t\t},\n\t\t\"default\": \"point\",\n\t\texpression: {\n\t\t\tinterpolated: false,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-constant\"\n\t},\n\t\"symbol-spacing\": {\n\t\ttype: \"number\",\n\t\t\"default\": 250,\n\t\tminimum: 1,\n\t\tunits: \"pixels\",\n\t\trequires: [\n\t\t\t{\n\t\t\t\t\"symbol-placement\": \"line\"\n\t\t\t}\n\t\t],\n\t\texpression: {\n\t\t\tinterpolated: true,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-constant\"\n\t},\n\t\"symbol-avoid-edges\": {\n\t\ttype: \"boolean\",\n\t\t\"default\": false,\n\t\texpression: {\n\t\t\tinterpolated: false,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-constant\"\n\t},\n\t\"symbol-sort-key\": {\n\t\ttype: \"number\",\n\t\texpression: {\n\t\t\tinterpolated: false,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\",\n\t\t\t\t\"feature\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-driven\"\n\t},\n\t\"symbol-z-order\": {\n\t\ttype: \"enum\",\n\t\tvalues: {\n\t\t\tauto: {\n\t\t\t},\n\t\t\t\"viewport-y\": {\n\t\t\t},\n\t\t\tsource: {\n\t\t\t}\n\t\t},\n\t\t\"default\": \"auto\",\n\t\texpression: {\n\t\t\tinterpolated: false,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-constant\"\n\t},\n\t\"icon-allow-overlap\": {\n\t\ttype: \"boolean\",\n\t\t\"default\": false,\n\t\trequires: [\n\t\t\t\"icon-image\",\n\t\t\t{\n\t\t\t\t\"!\": \"icon-overlap\"\n\t\t\t}\n\t\t],\n\t\texpression: {\n\t\t\tinterpolated: false,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-constant\"\n\t},\n\t\"icon-overlap\": {\n\t\ttype: \"enum\",\n\t\tvalues: {\n\t\t\tnever: {\n\t\t\t},\n\t\t\talways: {\n\t\t\t},\n\t\t\tcooperative: {\n\t\t\t}\n\t\t},\n\t\trequires: [\n\t\t\t\"icon-image\"\n\t\t],\n\t\texpression: {\n\t\t\tinterpolated: false,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-constant\"\n\t},\n\t\"icon-ignore-placement\": {\n\t\ttype: \"boolean\",\n\t\t\"default\": false,\n\t\trequires: [\n\t\t\t\"icon-image\"\n\t\t],\n\t\texpression: {\n\t\t\tinterpolated: false,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-constant\"\n\t},\n\t\"icon-optional\": {\n\t\ttype: \"boolean\",\n\t\t\"default\": false,\n\t\trequires: [\n\t\t\t\"icon-image\",\n\t\t\t\"text-field\"\n\t\t],\n\t\texpression: {\n\t\t\tinterpolated: false,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-constant\"\n\t},\n\t\"icon-rotation-alignment\": {\n\t\ttype: \"enum\",\n\t\tvalues: {\n\t\t\tmap: {\n\t\t\t},\n\t\t\tviewport: {\n\t\t\t},\n\t\t\tauto: {\n\t\t\t}\n\t\t},\n\t\t\"default\": \"auto\",\n\t\trequires: [\n\t\t\t\"icon-image\"\n\t\t],\n\t\texpression: {\n\t\t\tinterpolated: false,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-constant\"\n\t},\n\t\"icon-size\": {\n\t\ttype: \"number\",\n\t\t\"default\": 1,\n\t\tminimum: 0,\n\t\tunits: \"factor of the original icon size\",\n\t\trequires: 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false,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-constant\"\n\t},\n\t\"text-transform\": {\n\t\ttype: \"enum\",\n\t\tvalues: {\n\t\t\tnone: {\n\t\t\t},\n\t\t\tuppercase: {\n\t\t\t},\n\t\t\tlowercase: {\n\t\t\t}\n\t\t},\n\t\t\"default\": \"none\",\n\t\trequires: [\n\t\t\t\"text-field\"\n\t\t],\n\t\texpression: {\n\t\t\tinterpolated: false,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\",\n\t\t\t\t\"feature\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-driven\"\n\t},\n\t\"text-offset\": {\n\t\ttype: \"array\",\n\t\tvalue: \"number\",\n\t\tunits: \"ems\",\n\t\tlength: 2,\n\t\t\"default\": [\n\t\t\t0,\n\t\t\t0\n\t\t],\n\t\trequires: [\n\t\t\t\"text-field\",\n\t\t\t{\n\t\t\t\t\"!\": \"text-radial-offset\"\n\t\t\t}\n\t\t],\n\t\texpression: {\n\t\t\tinterpolated: true,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\",\n\t\t\t\t\"feature\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-driven\"\n\t},\n\t\"text-allow-overlap\": {\n\t\ttype: \"boolean\",\n\t\t\"default\": false,\n\t\trequires: [\n\t\t\t\"text-field\",\n\t\t\t{\n\t\t\t\t\"!\": \"text-overlap\"\n\t\t\t}\n\t\t],\n\t\texpression: {\n\t\t\tinterpolated: false,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-constant\"\n\t},\n\t\"text-overlap\": {\n\t\ttype: \"enum\",\n\t\tvalues: {\n\t\t\tnever: {\n\t\t\t},\n\t\t\talways: {\n\t\t\t},\n\t\t\tcooperative: {\n\t\t\t}\n\t\t},\n\t\trequires: [\n\t\t\t\"text-field\"\n\t\t],\n\t\texpression: {\n\t\t\tinterpolated: false,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-constant\"\n\t},\n\t\"text-ignore-placement\": {\n\t\ttype: \"boolean\",\n\t\t\"default\": false,\n\t\trequires: [\n\t\t\t\"text-field\"\n\t\t],\n\t\texpression: {\n\t\t\tinterpolated: false,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-constant\"\n\t},\n\t\"text-optional\": {\n\t\ttype: \"boolean\",\n\t\t\"default\": false,\n\t\trequires: [\n\t\t\t\"text-field\",\n\t\t\t\"icon-image\"\n\t\t],\n\t\texpression: {\n\t\t\tinterpolated: false,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-constant\"\n\t},\n\tvisibility: {\n\t\ttype: \"enum\",\n\t\tvalues: {\n\t\t\tvisible: {\n\t\t\t},\n\t\t\tnone: {\n\t\t\t}\n\t\t},\n\t\t\"default\": \"visible\",\n\t\texpression: {\n\t\t\tinterpolated: false,\n\t\t\tparameters: [\n\t\t\t\t\"global-state\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-constant\"\n\t}\n};\nvar layout_raster = {\n\tvisibility: {\n\t\ttype: \"enum\",\n\t\tvalues: {\n\t\t\tvisible: {\n\t\t\t},\n\t\t\tnone: {\n\t\t\t}\n\t\t},\n\t\t\"default\": \"visible\",\n\t\texpression: {\n\t\t\tinterpolated: false,\n\t\t\tparameters: [\n\t\t\t\t\"global-state\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-constant\"\n\t}\n};\nvar layout_hillshade = {\n\tvisibility: {\n\t\ttype: \"enum\",\n\t\tvalues: {\n\t\t\tvisible: {\n\t\t\t},\n\t\t\tnone: {\n\t\t\t}\n\t\t},\n\t\t\"default\": \"visible\",\n\t\texpression: {\n\t\t\tinterpolated: false,\n\t\t\tparameters: [\n\t\t\t\t\"global-state\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-constant\"\n\t}\n};\nvar filter = {\n\ttype: \"boolean\",\n\texpression: {\n\t\tinterpolated: false,\n\t\tparameters: [\n\t\t\t\"zoom\",\n\t\t\t\"feature\"\n\t\t]\n\t},\n\t\"property-type\": \"data-driven\"\n};\nvar filter_operator = {\n\ttype: \"enum\",\n\tvalues: {\n\t\t\"==\": {\n\t\t},\n\t\t\"!=\": {\n\t\t},\n\t\t\">\": {\n\t\t},\n\t\t\">=\": {\n\t\t},\n\t\t\"<\": {\n\t\t},\n\t\t\"<=\": {\n\t\t},\n\t\t\"in\": {\n\t\t},\n\t\t\"!in\": {\n\t\t},\n\t\tall: {\n\t\t},\n\t\tany: {\n\t\t},\n\t\tnone: {\n\t\t},\n\t\thas: {\n\t\t},\n\t\t\"!has\": {\n\t\t}\n\t}\n};\nvar geometry_type = {\n\ttype: \"enum\",\n\tvalues: {\n\t\tPoint: {\n\t\t},\n\t\tLineString: {\n\t\t},\n\t\tPolygon: {\n\t\t}\n\t}\n};\nvar function_stop = {\n\ttype: \"array\",\n\tminimum: 0,\n\tmaximum: 24,\n\tvalue: [\n\t\t\"number\",\n\t\t\"color\"\n\t],\n\tlength: 2\n};\nvar expression$1 = {\n\ttype: \"array\",\n\tvalue: \"expression_name\",\n\tminimum: 1\n};\nvar light = {\n\tanchor: {\n\t\ttype: \"enum\",\n\t\t\"default\": \"viewport\",\n\t\tvalues: {\n\t\t\tmap: {\n\t\t\t},\n\t\t\tviewport: {\n\t\t\t}\n\t\t},\n\t\t\"property-type\": \"data-constant\",\n\t\ttransition: false,\n\t\texpression: {\n\t\t\tinterpolated: false,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\"\n\t\t\t]\n\t\t}\n\t},\n\tposition: {\n\t\ttype: \"array\",\n\t\t\"default\": [\n\t\t\t1.15,\n\t\t\t210,\n\t\t\t30\n\t\t],\n\t\tlength: 3,\n\t\tvalue: \"number\",\n\t\t\"property-type\": \"data-constant\",\n\t\ttransition: true,\n\t\texpression: {\n\t\t\tinterpolated: true,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\"\n\t\t\t]\n\t\t}\n\t},\n\tcolor: {\n\t\ttype: \"color\",\n\t\t\"property-type\": \"data-constant\",\n\t\t\"default\": \"#ffffff\",\n\t\texpression: {\n\t\t\tinterpolated: true,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\"\n\t\t\t]\n\t\t},\n\t\ttransition: true\n\t},\n\tintensity: {\n\t\ttype: \"number\",\n\t\t\"property-type\": \"data-constant\",\n\t\t\"default\": 0.5,\n\t\tminimum: 0,\n\t\tmaximum: 1,\n\t\texpression: {\n\t\t\tinterpolated: true,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\"\n\t\t\t]\n\t\t},\n\t\ttransition: true\n\t}\n};\nvar sky = {\n\t\"sky-color\": {\n\t\ttype: \"color\",\n\t\t\"property-type\": \"data-constant\",\n\t\t\"default\": \"#88C6FC\",\n\t\texpression: {\n\t\t\tinterpolated: true,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\"\n\t\t\t]\n\t\t},\n\t\ttransition: true\n\t},\n\t\"horizon-color\": {\n\t\ttype: \"color\",\n\t\t\"property-type\": \"data-constant\",\n\t\t\"default\": \"#ffffff\",\n\t\texpression: {\n\t\t\tinterpolated: true,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\"\n\t\t\t]\n\t\t},\n\t\ttransition: true\n\t},\n\t\"fog-color\": {\n\t\ttype: \"color\",\n\t\t\"property-type\": \"data-constant\",\n\t\t\"default\": \"#ffffff\",\n\t\texpression: {\n\t\t\tinterpolated: true,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\"\n\t\t\t]\n\t\t},\n\t\ttransition: true\n\t},\n\t\"fog-ground-blend\": {\n\t\ttype: \"number\",\n\t\t\"property-type\": \"data-constant\",\n\t\t\"default\": 0.5,\n\t\tminimum: 0,\n\t\tmaximum: 1,\n\t\texpression: {\n\t\t\tinterpolated: true,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\"\n\t\t\t]\n\t\t},\n\t\ttransition: true\n\t},\n\t\"horizon-fog-blend\": {\n\t\ttype: \"number\",\n\t\t\"property-type\": \"data-constant\",\n\t\t\"default\": 0.8,\n\t\tminimum: 0,\n\t\tmaximum: 1,\n\t\texpression: {\n\t\t\tinterpolated: true,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\"\n\t\t\t]\n\t\t},\n\t\ttransition: true\n\t},\n\t\"sky-horizon-blend\": {\n\t\ttype: \"number\",\n\t\t\"property-type\": \"data-constant\",\n\t\t\"default\": 0.8,\n\t\tminimum: 0,\n\t\tmaximum: 1,\n\t\texpression: {\n\t\t\tinterpolated: true,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\"\n\t\t\t]\n\t\t},\n\t\ttransition: true\n\t},\n\t\"atmosphere-blend\": {\n\t\ttype: \"number\",\n\t\t\"property-type\": \"data-constant\",\n\t\t\"default\": 0.8,\n\t\tminimum: 0,\n\t\tmaximum: 1,\n\t\texpression: {\n\t\t\tinterpolated: true,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\"\n\t\t\t]\n\t\t},\n\t\ttransition: true\n\t}\n};\nvar terrain = {\n\tsource: {\n\t\ttype: \"string\",\n\t\trequired: true\n\t},\n\texaggeration: {\n\t\ttype: \"number\",\n\t\tminimum: 0,\n\t\t\"default\": 1\n\t}\n};\nvar projection = {\n\ttype: {\n\t\ttype: \"projectionDefinition\",\n\t\t\"default\": \"mercator\",\n\t\t\"property-type\": \"data-constant\",\n\t\ttransition: false,\n\t\texpression: {\n\t\t\tinterpolated: true,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\"\n\t\t\t]\n\t\t}\n\t}\n};\nvar paint = [\n\t\"paint_fill\",\n\t\"paint_line\",\n\t\"paint_circle\",\n\t\"paint_heatmap\",\n\t\"paint_fill-extrusion\",\n\t\"paint_symbol\",\n\t\"paint_raster\",\n\t\"paint_hillshade\",\n\t\"paint_color-relief\",\n\t\"paint_background\"\n];\nvar paint_fill = {\n\t\"fill-antialias\": {\n\t\ttype: \"boolean\",\n\t\t\"default\": true,\n\t\texpression: {\n\t\t\tinterpolated: false,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-constant\"\n\t},\n\t\"fill-opacity\": {\n\t\ttype: \"number\",\n\t\t\"default\": 1,\n\t\tminimum: 0,\n\t\tmaximum: 1,\n\t\ttransition: true,\n\t\texpression: {\n\t\t\tinterpolated: true,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\",\n\t\t\t\t\"feature\",\n\t\t\t\t\"feature-state\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-driven\"\n\t},\n\t\"fill-color\": {\n\t\ttype: \"color\",\n\t\t\"default\": \"#000000\",\n\t\ttransition: true,\n\t\trequires: [\n\t\t\t{\n\t\t\t\t\"!\": \"fill-pattern\"\n\t\t\t}\n\t\t],\n\t\texpression: {\n\t\t\tinterpolated: true,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\",\n\t\t\t\t\"feature\",\n\t\t\t\t\"feature-state\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-driven\"\n\t},\n\t\"fill-outline-color\": {\n\t\ttype: \"color\",\n\t\ttransition: true,\n\t\trequires: [\n\t\t\t{\n\t\t\t\t\"!\": \"fill-pattern\"\n\t\t\t},\n\t\t\t{\n\t\t\t\t\"fill-antialias\": true\n\t\t\t}\n\t\t],\n\t\texpression: {\n\t\t\tinterpolated: true,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\",\n\t\t\t\t\"feature\",\n\t\t\t\t\"feature-state\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-driven\"\n\t},\n\t\"fill-translate\": {\n\t\ttype: \"array\",\n\t\tvalue: \"number\",\n\t\tlength: 2,\n\t\t\"default\": [\n\t\t\t0,\n\t\t\t0\n\t\t],\n\t\ttransition: true,\n\t\tunits: \"pixels\",\n\t\texpression: {\n\t\t\tinterpolated: true,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-constant\"\n\t},\n\t\"fill-translate-anchor\": {\n\t\ttype: \"enum\",\n\t\tvalues: {\n\t\t\tmap: {\n\t\t\t},\n\t\t\tviewport: {\n\t\t\t}\n\t\t},\n\t\t\"default\": \"map\",\n\t\trequires: [\n\t\t\t\"fill-translate\"\n\t\t],\n\t\texpression: {\n\t\t\tinterpolated: false,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-constant\"\n\t},\n\t\"fill-pattern\": {\n\t\ttype: \"resolvedImage\",\n\t\ttransition: true,\n\t\texpression: {\n\t\t\tinterpolated: false,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\",\n\t\t\t\t\"feature\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"cross-faded-data-driven\"\n\t}\n};\nvar paint_line = {\n\t\"line-opacity\": {\n\t\ttype: \"number\",\n\t\t\"default\": 1,\n\t\tminimum: 0,\n\t\tmaximum: 1,\n\t\ttransition: true,\n\t\texpression: {\n\t\t\tinterpolated: true,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\",\n\t\t\t\t\"feature\",\n\t\t\t\t\"feature-state\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-driven\"\n\t},\n\t\"line-color\": {\n\t\ttype: \"color\",\n\t\t\"default\": \"#000000\",\n\t\ttransition: true,\n\t\trequires: [\n\t\t\t{\n\t\t\t\t\"!\": \"line-pattern\"\n\t\t\t}\n\t\t],\n\t\texpression: {\n\t\t\tinterpolated: true,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\",\n\t\t\t\t\"feature\",\n\t\t\t\t\"feature-state\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-driven\"\n\t},\n\t\"line-translate\": {\n\t\ttype: \"array\",\n\t\tvalue: \"number\",\n\t\tlength: 2,\n\t\t\"default\": [\n\t\t\t0,\n\t\t\t0\n\t\t],\n\t\ttransition: true,\n\t\tunits: \"pixels\",\n\t\texpression: {\n\t\t\tinterpolated: true,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-constant\"\n\t},\n\t\"line-translate-anchor\": {\n\t\ttype: \"enum\",\n\t\tvalues: {\n\t\t\tmap: {\n\t\t\t},\n\t\t\tviewport: {\n\t\t\t}\n\t\t},\n\t\t\"default\": \"map\",\n\t\trequires: [\n\t\t\t\"line-translate\"\n\t\t],\n\t\texpression: {\n\t\t\tinterpolated: false,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-constant\"\n\t},\n\t\"line-width\": {\n\t\ttype: \"number\",\n\t\t\"default\": 1,\n\t\tminimum: 0,\n\t\ttransition: true,\n\t\tunits: \"pixels\",\n\t\texpression: {\n\t\t\tinterpolated: true,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\",\n\t\t\t\t\"feature\",\n\t\t\t\t\"feature-state\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-driven\"\n\t},\n\t\"line-gap-width\": {\n\t\ttype: \"number\",\n\t\t\"default\": 0,\n\t\tminimum: 0,\n\t\ttransition: true,\n\t\tunits: \"pixels\",\n\t\texpression: {\n\t\t\tinterpolated: true,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\",\n\t\t\t\t\"feature\",\n\t\t\t\t\"feature-state\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-driven\"\n\t},\n\t\"line-offset\": {\n\t\ttype: \"number\",\n\t\t\"default\": 0,\n\t\ttransition: true,\n\t\tunits: \"pixels\",\n\t\texpression: {\n\t\t\tinterpolated: true,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\",\n\t\t\t\t\"feature\",\n\t\t\t\t\"feature-state\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-driven\"\n\t},\n\t\"line-blur\": {\n\t\ttype: \"number\",\n\t\t\"default\": 0,\n\t\tminimum: 0,\n\t\ttransition: true,\n\t\tunits: \"pixels\",\n\t\texpression: {\n\t\t\tinterpolated: true,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\",\n\t\t\t\t\"feature\",\n\t\t\t\t\"feature-state\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-driven\"\n\t},\n\t\"line-dasharray\": {\n\t\ttype: \"array\",\n\t\tvalue: \"number\",\n\t\tminimum: 0,\n\t\ttransition: true,\n\t\tunits: \"line widths\",\n\t\trequires: [\n\t\t\t{\n\t\t\t\t\"!\": \"line-pattern\"\n\t\t\t}\n\t\t],\n\t\texpression: {\n\t\t\tinterpolated: false,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\",\n\t\t\t\t\"feature\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"cross-faded-data-driven\"\n\t},\n\t\"line-pattern\": {\n\t\ttype: \"resolvedImage\",\n\t\ttransition: true,\n\t\texpression: {\n\t\t\tinterpolated: false,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\",\n\t\t\t\t\"feature\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"cross-faded-data-driven\"\n\t},\n\t\"line-gradient\": {\n\t\ttype: \"color\",\n\t\ttransition: false,\n\t\trequires: [\n\t\t\t{\n\t\t\t\t\"!\": \"line-dasharray\"\n\t\t\t},\n\t\t\t{\n\t\t\t\t\"!\": \"line-pattern\"\n\t\t\t},\n\t\t\t{\n\t\t\t\tsource: \"geojson\",\n\t\t\t\thas: {\n\t\t\t\t\tlineMetrics: true\n\t\t\t\t}\n\t\t\t}\n\t\t],\n\t\texpression: {\n\t\t\tinterpolated: true,\n\t\t\tparameters: [\n\t\t\t\t\"line-progress\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"color-ramp\"\n\t}\n};\nvar paint_circle = {\n\t\"circle-radius\": {\n\t\ttype: \"number\",\n\t\t\"default\": 5,\n\t\tminimum: 0,\n\t\ttransition: true,\n\t\tunits: \"pixels\",\n\t\texpression: {\n\t\t\tinterpolated: true,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\",\n\t\t\t\t\"feature\",\n\t\t\t\t\"feature-state\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-driven\"\n\t},\n\t\"circle-color\": {\n\t\ttype: \"color\",\n\t\t\"default\": \"#000000\",\n\t\ttransition: true,\n\t\texpression: {\n\t\t\tinterpolated: true,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\",\n\t\t\t\t\"feature\",\n\t\t\t\t\"feature-state\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-driven\"\n\t},\n\t\"circle-blur\": {\n\t\ttype: \"number\",\n\t\t\"default\": 0,\n\t\ttransition: true,\n\t\texpression: {\n\t\t\tinterpolated: true,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\",\n\t\t\t\t\"feature\",\n\t\t\t\t\"feature-state\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-driven\"\n\t},\n\t\"circle-opacity\": {\n\t\ttype: \"number\",\n\t\t\"default\": 1,\n\t\tminimum: 0,\n\t\tmaximum: 1,\n\t\ttransition: true,\n\t\texpression: {\n\t\t\tinterpolated: true,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\",\n\t\t\t\t\"feature\",\n\t\t\t\t\"feature-state\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-driven\"\n\t},\n\t\"circle-translate\": {\n\t\ttype: \"array\",\n\t\tvalue: \"number\",\n\t\tlength: 2,\n\t\t\"default\": [\n\t\t\t0,\n\t\t\t0\n\t\t],\n\t\ttransition: true,\n\t\tunits: \"pixels\",\n\t\texpression: {\n\t\t\tinterpolated: true,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-constant\"\n\t},\n\t\"circle-translate-anchor\": {\n\t\ttype: \"enum\",\n\t\tvalues: {\n\t\t\tmap: {\n\t\t\t},\n\t\t\tviewport: {\n\t\t\t}\n\t\t},\n\t\t\"default\": \"map\",\n\t\trequires: [\n\t\t\t\"circle-translate\"\n\t\t],\n\t\texpression: {\n\t\t\tinterpolated: false,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-constant\"\n\t},\n\t\"circle-pitch-scale\": {\n\t\ttype: \"enum\",\n\t\tvalues: {\n\t\t\tmap: {\n\t\t\t},\n\t\t\tviewport: {\n\t\t\t}\n\t\t},\n\t\t\"default\": \"map\",\n\t\texpression: {\n\t\t\tinterpolated: false,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-constant\"\n\t},\n\t\"circle-pitch-alignment\": {\n\t\ttype: \"enum\",\n\t\tvalues: {\n\t\t\tmap: {\n\t\t\t},\n\t\t\tviewport: {\n\t\t\t}\n\t\t},\n\t\t\"default\": \"viewport\",\n\t\texpression: {\n\t\t\tinterpolated: false,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-constant\"\n\t},\n\t\"circle-stroke-width\": {\n\t\ttype: \"number\",\n\t\t\"default\": 0,\n\t\tminimum: 0,\n\t\ttransition: true,\n\t\tunits: \"pixels\",\n\t\texpression: {\n\t\t\tinterpolated: true,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\",\n\t\t\t\t\"feature\",\n\t\t\t\t\"feature-state\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-driven\"\n\t},\n\t\"circle-stroke-color\": {\n\t\ttype: \"color\",\n\t\t\"default\": \"#000000\",\n\t\ttransition: true,\n\t\texpression: {\n\t\t\tinterpolated: true,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\",\n\t\t\t\t\"feature\",\n\t\t\t\t\"feature-state\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-driven\"\n\t},\n\t\"circle-stroke-opacity\": {\n\t\ttype: \"number\",\n\t\t\"default\": 1,\n\t\tminimum: 0,\n\t\tmaximum: 1,\n\t\ttransition: true,\n\t\texpression: {\n\t\t\tinterpolated: true,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\",\n\t\t\t\t\"feature\",\n\t\t\t\t\"feature-state\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-driven\"\n\t}\n};\nvar paint_heatmap = {\n\t\"heatmap-radius\": {\n\t\ttype: \"number\",\n\t\t\"default\": 30,\n\t\tminimum: 1,\n\t\ttransition: true,\n\t\tunits: \"pixels\",\n\t\texpression: {\n\t\t\tinterpolated: true,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\",\n\t\t\t\t\"feature\",\n\t\t\t\t\"feature-state\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-driven\"\n\t},\n\t\"heatmap-weight\": {\n\t\ttype: \"number\",\n\t\t\"default\": 1,\n\t\tminimum: 0,\n\t\ttransition: false,\n\t\texpression: {\n\t\t\tinterpolated: true,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\",\n\t\t\t\t\"feature\",\n\t\t\t\t\"feature-state\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-driven\"\n\t},\n\t\"heatmap-intensity\": {\n\t\ttype: \"number\",\n\t\t\"default\": 1,\n\t\tminimum: 0,\n\t\ttransition: true,\n\t\texpression: {\n\t\t\tinterpolated: true,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-constant\"\n\t},\n\t\"heatmap-color\": {\n\t\ttype: \"color\",\n\t\t\"default\": [\n\t\t\t\"interpolate\",\n\t\t\t[\n\t\t\t\t\"linear\"\n\t\t\t],\n\t\t\t[\n\t\t\t\t\"heatmap-density\"\n\t\t\t],\n\t\t\t0,\n\t\t\t\"rgba(0, 0, 255, 0)\",\n\t\t\t0.1,\n\t\t\t\"royalblue\",\n\t\t\t0.3,\n\t\t\t\"cyan\",\n\t\t\t0.5,\n\t\t\t\"lime\",\n\t\t\t0.7,\n\t\t\t\"yellow\",\n\t\t\t1,\n\t\t\t\"red\"\n\t\t],\n\t\ttransition: false,\n\t\texpression: {\n\t\t\tinterpolated: true,\n\t\t\tparameters: [\n\t\t\t\t\"heatmap-density\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"color-ramp\"\n\t},\n\t\"heatmap-opacity\": {\n\t\ttype: \"number\",\n\t\t\"default\": 1,\n\t\tminimum: 0,\n\t\tmaximum: 1,\n\t\ttransition: true,\n\t\texpression: {\n\t\t\tinterpolated: true,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-constant\"\n\t}\n};\nvar paint_symbol = {\n\t\"icon-opacity\": {\n\t\ttype: \"number\",\n\t\t\"default\": 1,\n\t\tminimum: 0,\n\t\tmaximum: 1,\n\t\ttransition: true,\n\t\trequires: [\n\t\t\t\"icon-image\"\n\t\t],\n\t\texpression: {\n\t\t\tinterpolated: true,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\",\n\t\t\t\t\"feature\",\n\t\t\t\t\"feature-state\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-driven\"\n\t},\n\t\"icon-color\": {\n\t\ttype: \"color\",\n\t\t\"default\": \"#000000\",\n\t\ttransition: true,\n\t\trequires: [\n\t\t\t\"icon-image\"\n\t\t],\n\t\texpression: {\n\t\t\tinterpolated: true,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\",\n\t\t\t\t\"feature\",\n\t\t\t\t\"feature-state\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-driven\"\n\t},\n\t\"icon-halo-color\": {\n\t\ttype: \"color\",\n\t\t\"default\": \"rgba(0, 0, 0, 0)\",\n\t\ttransition: true,\n\t\trequires: [\n\t\t\t\"icon-image\"\n\t\t],\n\t\texpression: {\n\t\t\tinterpolated: true,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\",\n\t\t\t\t\"feature\",\n\t\t\t\t\"feature-state\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-driven\"\n\t},\n\t\"icon-halo-width\": {\n\t\ttype: \"number\",\n\t\t\"default\": 0,\n\t\tminimum: 0,\n\t\ttransition: true,\n\t\tunits: \"pixels\",\n\t\trequires: [\n\t\t\t\"icon-image\"\n\t\t],\n\t\texpression: {\n\t\t\tinterpolated: true,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\",\n\t\t\t\t\"feature\",\n\t\t\t\t\"feature-state\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-driven\"\n\t},\n\t\"icon-halo-blur\": {\n\t\ttype: \"number\",\n\t\t\"default\": 0,\n\t\tminimum: 0,\n\t\ttransition: true,\n\t\tunits: \"pixels\",\n\t\trequires: [\n\t\t\t\"icon-image\"\n\t\t],\n\t\texpression: {\n\t\t\tinterpolated: true,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\",\n\t\t\t\t\"feature\",\n\t\t\t\t\"feature-state\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-driven\"\n\t},\n\t\"icon-translate\": {\n\t\ttype: \"array\",\n\t\tvalue: \"number\",\n\t\tlength: 2,\n\t\t\"default\": [\n\t\t\t0,\n\t\t\t0\n\t\t],\n\t\ttransition: true,\n\t\tunits: \"pixels\",\n\t\trequires: [\n\t\t\t\"icon-image\"\n\t\t],\n\t\texpression: {\n\t\t\tinterpolated: true,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-constant\"\n\t},\n\t\"icon-translate-anchor\": {\n\t\ttype: \"enum\",\n\t\tvalues: {\n\t\t\tmap: {\n\t\t\t},\n\t\t\tviewport: {\n\t\t\t}\n\t\t},\n\t\t\"default\": \"map\",\n\t\trequires: [\n\t\t\t\"icon-image\",\n\t\t\t\"icon-translate\"\n\t\t],\n\t\texpression: {\n\t\t\tinterpolated: false,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-constant\"\n\t},\n\t\"text-opacity\": {\n\t\ttype: \"number\",\n\t\t\"default\": 1,\n\t\tminimum: 0,\n\t\tmaximum: 1,\n\t\ttransition: true,\n\t\trequires: [\n\t\t\t\"text-field\"\n\t\t],\n\t\texpression: {\n\t\t\tinterpolated: true,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\",\n\t\t\t\t\"feature\",\n\t\t\t\t\"feature-state\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-driven\"\n\t},\n\t\"text-color\": {\n\t\ttype: \"color\",\n\t\t\"default\": \"#000000\",\n\t\ttransition: true,\n\t\toverridable: true,\n\t\trequires: [\n\t\t\t\"text-field\"\n\t\t],\n\t\texpression: {\n\t\t\tinterpolated: true,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\",\n\t\t\t\t\"feature\",\n\t\t\t\t\"feature-state\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-driven\"\n\t},\n\t\"text-halo-color\": {\n\t\ttype: \"color\",\n\t\t\"default\": \"rgba(0, 0, 0, 0)\",\n\t\ttransition: true,\n\t\trequires: [\n\t\t\t\"text-field\"\n\t\t],\n\t\texpression: {\n\t\t\tinterpolated: true,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\",\n\t\t\t\t\"feature\",\n\t\t\t\t\"feature-state\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-driven\"\n\t},\n\t\"text-halo-width\": {\n\t\ttype: \"number\",\n\t\t\"default\": 0,\n\t\tminimum: 0,\n\t\ttransition: true,\n\t\tunits: \"pixels\",\n\t\trequires: [\n\t\t\t\"text-field\"\n\t\t],\n\t\texpression: {\n\t\t\tinterpolated: true,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\",\n\t\t\t\t\"feature\",\n\t\t\t\t\"feature-state\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-driven\"\n\t},\n\t\"text-halo-blur\": {\n\t\ttype: \"number\",\n\t\t\"default\": 0,\n\t\tminimum: 0,\n\t\ttransition: true,\n\t\tunits: \"pixels\",\n\t\trequires: [\n\t\t\t\"text-field\"\n\t\t],\n\t\texpression: {\n\t\t\tinterpolated: true,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\",\n\t\t\t\t\"feature\",\n\t\t\t\t\"feature-state\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-driven\"\n\t},\n\t\"text-translate\": {\n\t\ttype: \"array\",\n\t\tvalue: \"number\",\n\t\tlength: 2,\n\t\t\"default\": [\n\t\t\t0,\n\t\t\t0\n\t\t],\n\t\ttransition: true,\n\t\tunits: \"pixels\",\n\t\trequires: [\n\t\t\t\"text-field\"\n\t\t],\n\t\texpression: {\n\t\t\tinterpolated: true,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-constant\"\n\t},\n\t\"text-translate-anchor\": {\n\t\ttype: \"enum\",\n\t\tvalues: {\n\t\t\tmap: {\n\t\t\t},\n\t\t\tviewport: {\n\t\t\t}\n\t\t},\n\t\t\"default\": \"map\",\n\t\trequires: [\n\t\t\t\"text-field\",\n\t\t\t\"text-translate\"\n\t\t],\n\t\texpression: {\n\t\t\tinterpolated: false,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-constant\"\n\t}\n};\nvar paint_raster = {\n\t\"raster-opacity\": {\n\t\ttype: \"number\",\n\t\t\"default\": 1,\n\t\tminimum: 0,\n\t\tmaximum: 1,\n\t\ttransition: true,\n\t\texpression: {\n\t\t\tinterpolated: true,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-constant\"\n\t},\n\t\"raster-hue-rotate\": {\n\t\ttype: \"number\",\n\t\t\"default\": 0,\n\t\tperiod: 360,\n\t\ttransition: true,\n\t\tunits: \"degrees\",\n\t\texpression: {\n\t\t\tinterpolated: true,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-constant\"\n\t},\n\t\"raster-brightness-min\": {\n\t\ttype: \"number\",\n\t\t\"default\": 0,\n\t\tminimum: 0,\n\t\tmaximum: 1,\n\t\ttransition: true,\n\t\texpression: {\n\t\t\tinterpolated: true,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-constant\"\n\t},\n\t\"raster-brightness-max\": {\n\t\ttype: \"number\",\n\t\t\"default\": 1,\n\t\tminimum: 0,\n\t\tmaximum: 1,\n\t\ttransition: true,\n\t\texpression: {\n\t\t\tinterpolated: true,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-constant\"\n\t},\n\t\"raster-saturation\": {\n\t\ttype: \"number\",\n\t\t\"default\": 0,\n\t\tminimum: -1,\n\t\tmaximum: 1,\n\t\ttransition: true,\n\t\texpression: {\n\t\t\tinterpolated: true,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-constant\"\n\t},\n\t\"raster-contrast\": {\n\t\ttype: \"number\",\n\t\t\"default\": 0,\n\t\tminimum: -1,\n\t\tmaximum: 1,\n\t\ttransition: true,\n\t\texpression: {\n\t\t\tinterpolated: true,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-constant\"\n\t},\n\tresampling: {\n\t\ttype: \"enum\",\n\t\tvalues: {\n\t\t\tlinear: {\n\t\t\t},\n\t\t\tnearest: {\n\t\t\t}\n\t\t},\n\t\t\"default\": \"linear\",\n\t\texpression: {\n\t\t\tinterpolated: false,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-constant\"\n\t},\n\t\"raster-resampling\": {\n\t\ttype: \"enum\",\n\t\tvalues: {\n\t\t\tlinear: {\n\t\t\t},\n\t\t\tnearest: {\n\t\t\t}\n\t\t},\n\t\t\"default\": \"linear\",\n\t\texpression: {\n\t\t\tinterpolated: false,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-constant\"\n\t},\n\t\"raster-fade-duration\": {\n\t\ttype: \"number\",\n\t\t\"default\": 300,\n\t\tminimum: 0,\n\t\ttransition: false,\n\t\tunits: \"milliseconds\",\n\t\texpression: {\n\t\t\tinterpolated: true,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-constant\"\n\t}\n};\nvar paint_hillshade = {\n\t\"hillshade-illumination-direction\": {\n\t\ttype: \"numberArray\",\n\t\t\"default\": 335,\n\t\tminimum: 0,\n\t\tmaximum: 359,\n\t\ttransition: false,\n\t\texpression: {\n\t\t\tinterpolated: true,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-constant\"\n\t},\n\t\"hillshade-illumination-altitude\": {\n\t\ttype: \"numberArray\",\n\t\t\"default\": 45,\n\t\tminimum: 0,\n\t\tmaximum: 90,\n\t\ttransition: false,\n\t\texpression: {\n\t\t\tinterpolated: true,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-constant\"\n\t},\n\t\"hillshade-illumination-anchor\": {\n\t\ttype: \"enum\",\n\t\tvalues: {\n\t\t\tmap: {\n\t\t\t},\n\t\t\tviewport: {\n\t\t\t}\n\t\t},\n\t\t\"default\": \"viewport\",\n\t\texpression: {\n\t\t\tinterpolated: false,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-constant\"\n\t},\n\t\"hillshade-exaggeration\": {\n\t\ttype: \"number\",\n\t\t\"default\": 0.5,\n\t\tminimum: 0,\n\t\tmaximum: 1,\n\t\ttransition: true,\n\t\texpression: {\n\t\t\tinterpolated: true,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-constant\"\n\t},\n\t\"hillshade-shadow-color\": {\n\t\ttype: \"colorArray\",\n\t\t\"default\": \"#000000\",\n\t\ttransition: true,\n\t\texpression: {\n\t\t\tinterpolated: true,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-constant\"\n\t},\n\t\"hillshade-highlight-color\": {\n\t\ttype: \"colorArray\",\n\t\t\"default\": \"#FFFFFF\",\n\t\ttransition: true,\n\t\texpression: {\n\t\t\tinterpolated: true,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-constant\"\n\t},\n\t\"hillshade-accent-color\": {\n\t\ttype: \"color\",\n\t\t\"default\": \"#000000\",\n\t\ttransition: true,\n\t\texpression: {\n\t\t\tinterpolated: true,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-constant\"\n\t},\n\t\"hillshade-method\": {\n\t\ttype: \"enum\",\n\t\tvalues: {\n\t\t\tstandard: {\n\t\t\t},\n\t\t\tbasic: {\n\t\t\t},\n\t\t\tcombined: {\n\t\t\t},\n\t\t\tigor: {\n\t\t\t},\n\t\t\tmultidirectional: {\n\t\t\t}\n\t\t},\n\t\t\"default\": \"standard\",\n\t\texpression: {\n\t\t\tinterpolated: false,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-constant\"\n\t},\n\tresampling: {\n\t\ttype: \"enum\",\n\t\tvalues: {\n\t\t\tlinear: {\n\t\t\t},\n\t\t\tnearest: {\n\t\t\t}\n\t\t},\n\t\t\"default\": \"linear\",\n\t\texpression: {\n\t\t\tinterpolated: false,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-constant\"\n\t}\n};\nvar paint_background = {\n\t\"background-color\": {\n\t\ttype: \"color\",\n\t\t\"default\": \"#000000\",\n\t\ttransition: true,\n\t\trequires: [\n\t\t\t{\n\t\t\t\t\"!\": \"background-pattern\"\n\t\t\t}\n\t\t],\n\t\texpression: {\n\t\t\tinterpolated: true,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-constant\"\n\t},\n\t\"background-pattern\": {\n\t\ttype: \"resolvedImage\",\n\t\ttransition: true,\n\t\texpression: {\n\t\t\tinterpolated: false,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"cross-faded\"\n\t},\n\t\"background-opacity\": {\n\t\ttype: \"number\",\n\t\t\"default\": 1,\n\t\tminimum: 0,\n\t\tmaximum: 1,\n\t\ttransition: true,\n\t\texpression: {\n\t\t\tinterpolated: true,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-constant\"\n\t}\n};\nvar transition = {\n\tduration: {\n\t\ttype: \"number\",\n\t\t\"default\": 300,\n\t\tminimum: 0,\n\t\tunits: \"milliseconds\"\n\t},\n\tdelay: {\n\t\ttype: \"number\",\n\t\t\"default\": 0,\n\t\tminimum: 0,\n\t\tunits: \"milliseconds\"\n\t}\n};\nvar promoteId = {\n\t\"*\": {\n\t\ttype: \"string\"\n\t}\n};\nvar interpolation = {\n\ttype: \"array\",\n\tvalue: \"interpolation_name\",\n\tminimum: 1\n};\nvar interpolation_name = {\n\ttype: \"enum\",\n\tvalues: {\n\t\tlinear: {\n\t\t\tsyntax: {\n\t\t\t\toverloads: [\n\t\t\t\t\t{\n\t\t\t\t\t\tparameters: [\n\t\t\t\t\t\t],\n\t\t\t\t\t\t\"output-type\": \"interpolation\"\n\t\t\t\t\t}\n\t\t\t\t],\n\t\t\t\tparameters: [\n\t\t\t\t]\n\t\t\t}\n\t\t},\n\t\texponential: {\n\t\t\tsyntax: {\n\t\t\t\toverloads: [\n\t\t\t\t\t{\n\t\t\t\t\t\tparameters: [\n\t\t\t\t\t\t\t\"base\"\n\t\t\t\t\t\t],\n\t\t\t\t\t\t\"output-type\": \"interpolation\"\n\t\t\t\t\t}\n\t\t\t\t],\n\t\t\t\tparameters: [\n\t\t\t\t\t{\n\t\t\t\t\t\tname: \"base\",\n\t\t\t\t\t\ttype: \"number literal\"\n\t\t\t\t\t}\n\t\t\t\t]\n\t\t\t}\n\t\t},\n\t\t\"cubic-bezier\": {\n\t\t\tsyntax: {\n\t\t\t\toverloads: [\n\t\t\t\t\t{\n\t\t\t\t\t\tparameters: [\n\t\t\t\t\t\t\t\"x1\",\n\t\t\t\t\t\t\t\"y1\",\n\t\t\t\t\t\t\t\"x2\",\n\t\t\t\t\t\t\t\"y2\"\n\t\t\t\t\t\t],\n\t\t\t\t\t\t\"output-type\": \"interpolation\"\n\t\t\t\t\t}\n\t\t\t\t],\n\t\t\t\tparameters: [\n\t\t\t\t\t{\n\t\t\t\t\t\tname: \"x1\",\n\t\t\t\t\t\ttype: \"number literal\"\n\t\t\t\t\t},\n\t\t\t\t\t{\n\t\t\t\t\t\tname: \"y1\",\n\t\t\t\t\t\ttype: \"number literal\"\n\t\t\t\t\t},\n\t\t\t\t\t{\n\t\t\t\t\t\tname: \"x2\",\n\t\t\t\t\t\ttype: \"number literal\"\n\t\t\t\t\t},\n\t\t\t\t\t{\n\t\t\t\t\t\tname: \"y2\",\n\t\t\t\t\t\ttype: \"number literal\"\n\t\t\t\t\t}\n\t\t\t\t]\n\t\t\t}\n\t\t}\n\t}\n};\nvar v8Spec = {\n\t$version: $version,\n\t$root: $root,\n\tsources: sources,\n\tsource: source,\n\tsource_vector: source_vector,\n\tsource_raster: source_raster,\n\tsource_raster_dem: source_raster_dem,\n\tsource_geojson: source_geojson,\n\tsource_video: source_video,\n\tsource_image: source_image,\n\tlayer: layer,\n\tlayout: layout,\n\tlayout_background: layout_background,\n\tlayout_fill: layout_fill,\n\tlayout_circle: layout_circle,\n\tlayout_heatmap: layout_heatmap,\n\t\"layout_fill-extrusion\": {\n\tvisibility: {\n\t\ttype: \"enum\",\n\t\tvalues: {\n\t\t\tvisible: {\n\t\t\t},\n\t\t\tnone: {\n\t\t\t}\n\t\t},\n\t\t\"default\": \"visible\",\n\t\texpression: {\n\t\t\tinterpolated: false,\n\t\t\tparameters: [\n\t\t\t\t\"global-state\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-constant\"\n\t}\n},\n\tlayout_line: layout_line,\n\tlayout_symbol: layout_symbol,\n\tlayout_raster: layout_raster,\n\tlayout_hillshade: layout_hillshade,\n\t\"layout_color-relief\": {\n\tvisibility: {\n\t\ttype: \"enum\",\n\t\tvalues: {\n\t\t\tvisible: {\n\t\t\t},\n\t\t\tnone: {\n\t\t\t}\n\t\t},\n\t\t\"default\": \"visible\",\n\t\texpression: {\n\t\t\tinterpolated: false,\n\t\t\tparameters: [\n\t\t\t\t\"global-state\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-constant\"\n\t}\n},\n\tfilter: filter,\n\tfilter_operator: filter_operator,\n\tgeometry_type: geometry_type,\n\t\"function\": {\n\texpression: {\n\t\ttype: \"expression\"\n\t},\n\tstops: {\n\t\ttype: \"array\",\n\t\tvalue: \"function_stop\"\n\t},\n\tbase: {\n\t\ttype: \"number\",\n\t\t\"default\": 1,\n\t\tminimum: 0\n\t},\n\tproperty: {\n\t\ttype: \"string\",\n\t\t\"default\": \"$zoom\"\n\t},\n\ttype: {\n\t\ttype: \"enum\",\n\t\tvalues: {\n\t\t\tidentity: {\n\t\t\t},\n\t\t\texponential: {\n\t\t\t},\n\t\t\tinterval: {\n\t\t\t},\n\t\t\tcategorical: {\n\t\t\t}\n\t\t},\n\t\t\"default\": \"exponential\"\n\t},\n\tcolorSpace: {\n\t\ttype: \"enum\",\n\t\tvalues: {\n\t\t\trgb: {\n\t\t\t},\n\t\t\tlab: {\n\t\t\t},\n\t\t\thcl: {\n\t\t\t}\n\t\t},\n\t\t\"default\": \"rgb\"\n\t},\n\t\"default\": {\n\t\ttype: \"*\",\n\t\trequired: false\n\t}\n},\n\tfunction_stop: function_stop,\n\texpression: expression$1,\n\tlight: light,\n\tsky: sky,\n\tterrain: terrain,\n\tprojection: projection,\n\tpaint: paint,\n\tpaint_fill: paint_fill,\n\t\"paint_fill-extrusion\": {\n\t\"fill-extrusion-opacity\": {\n\t\ttype: \"number\",\n\t\t\"default\": 1,\n\t\tminimum: 0,\n\t\tmaximum: 1,\n\t\ttransition: true,\n\t\texpression: {\n\t\t\tinterpolated: true,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-constant\"\n\t},\n\t\"fill-extrusion-color\": {\n\t\ttype: \"color\",\n\t\t\"default\": \"#000000\",\n\t\ttransition: true,\n\t\trequires: [\n\t\t\t{\n\t\t\t\t\"!\": \"fill-extrusion-pattern\"\n\t\t\t}\n\t\t],\n\t\texpression: {\n\t\t\tinterpolated: true,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\",\n\t\t\t\t\"feature\",\n\t\t\t\t\"feature-state\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-driven\"\n\t},\n\t\"fill-extrusion-translate\": {\n\t\ttype: \"array\",\n\t\tvalue: \"number\",\n\t\tlength: 2,\n\t\t\"default\": [\n\t\t\t0,\n\t\t\t0\n\t\t],\n\t\ttransition: true,\n\t\tunits: \"pixels\",\n\t\texpression: {\n\t\t\tinterpolated: true,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-constant\"\n\t},\n\t\"fill-extrusion-translate-anchor\": {\n\t\ttype: \"enum\",\n\t\tvalues: {\n\t\t\tmap: {\n\t\t\t},\n\t\t\tviewport: {\n\t\t\t}\n\t\t},\n\t\t\"default\": \"map\",\n\t\trequires: [\n\t\t\t\"fill-extrusion-translate\"\n\t\t],\n\t\texpression: {\n\t\t\tinterpolated: false,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-constant\"\n\t},\n\t\"fill-extrusion-pattern\": {\n\t\ttype: \"resolvedImage\",\n\t\ttransition: true,\n\t\texpression: {\n\t\t\tinterpolated: false,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\",\n\t\t\t\t\"feature\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"cross-faded-data-driven\"\n\t},\n\t\"fill-extrusion-height\": {\n\t\ttype: \"number\",\n\t\t\"default\": 0,\n\t\tminimum: 0,\n\t\tunits: \"meters\",\n\t\ttransition: true,\n\t\texpression: {\n\t\t\tinterpolated: true,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\",\n\t\t\t\t\"feature\",\n\t\t\t\t\"feature-state\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-driven\"\n\t},\n\t\"fill-extrusion-base\": {\n\t\ttype: \"number\",\n\t\t\"default\": 0,\n\t\tminimum: 0,\n\t\tunits: \"meters\",\n\t\ttransition: true,\n\t\trequires: [\n\t\t\t\"fill-extrusion-height\"\n\t\t],\n\t\texpression: {\n\t\t\tinterpolated: true,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\",\n\t\t\t\t\"feature\",\n\t\t\t\t\"feature-state\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-driven\"\n\t},\n\t\"fill-extrusion-vertical-gradient\": {\n\t\ttype: \"boolean\",\n\t\t\"default\": true,\n\t\ttransition: false,\n\t\texpression: {\n\t\t\tinterpolated: false,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-constant\"\n\t}\n},\n\tpaint_line: paint_line,\n\tpaint_circle: paint_circle,\n\tpaint_heatmap: paint_heatmap,\n\tpaint_symbol: paint_symbol,\n\tpaint_raster: paint_raster,\n\tpaint_hillshade: paint_hillshade,\n\t\"paint_color-relief\": {\n\t\"color-relief-opacity\": {\n\t\ttype: \"number\",\n\t\t\"default\": 1,\n\t\tminimum: 0,\n\t\tmaximum: 1,\n\t\ttransition: true,\n\t\texpression: {\n\t\t\tinterpolated: true,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-constant\"\n\t},\n\t\"color-relief-color\": {\n\t\ttype: \"color\",\n\t\ttransition: false,\n\t\texpression: {\n\t\t\tinterpolated: true,\n\t\t\tparameters: [\n\t\t\t\t\"elevation\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"color-ramp\"\n\t},\n\tresampling: {\n\t\ttype: \"enum\",\n\t\tvalues: {\n\t\t\tlinear: {\n\t\t\t},\n\t\t\tnearest: {\n\t\t\t}\n\t\t},\n\t\t\"default\": \"linear\",\n\t\texpression: {\n\t\t\tinterpolated: false,\n\t\t\tparameters: [\n\t\t\t\t\"zoom\"\n\t\t\t]\n\t\t},\n\t\t\"property-type\": \"data-constant\"\n\t}\n},\n\tpaint_background: paint_background,\n\ttransition: transition,\n\t\"property-type\": {\n\t\"data-driven\": {\n\t\ttype: \"property-type\"\n\t},\n\t\"cross-faded\": {\n\t\ttype: \"property-type\"\n\t},\n\t\"cross-faded-data-driven\": {\n\t\ttype: \"property-type\"\n\t},\n\t\"color-ramp\": {\n\t\ttype: \"property-type\"\n\t},\n\t\"data-constant\": {\n\t\ttype: \"property-type\"\n\t},\n\tconstant: {\n\t\ttype: \"property-type\"\n\t}\n},\n\tpromoteId: promoteId,\n\tinterpolation: interpolation,\n\tinterpolation_name: interpolation_name\n};\n\nconst refProperties = [\n 'type',\n 'source',\n 'source-layer',\n 'minzoom',\n 'maxzoom',\n 'filter',\n 'layout'\n];\n\nfunction deref(layer, parent) {\n const result = {};\n for (const k in layer) {\n if (k !== 'ref') {\n result[k] = layer[k];\n }\n }\n refProperties.forEach((k) => {\n if (k in parent) {\n result[k] = parent[k];\n }\n });\n return result;\n}\n/**\n *\n * The input is not modified. The output may contain references to portions\n * of the input.\n *\n * @param layers - array of layers, some of which may contain `ref` properties\n * whose value is the `id` of another property\n * @returns a new array where such layers have been augmented with the 'type', 'source', etc. properties\n * from the parent layer, and the `ref` property has been removed.\n */\nfunction derefLayers(layers) {\n layers = layers.slice();\n const map = Object.create(null);\n for (let i = 0; i < layers.length; i++) {\n map[layers[i].id] = layers[i];\n }\n for (let i = 0; i < layers.length; i++) {\n if ('ref' in layers[i]) {\n layers[i] = deref(layers[i], map[layers[i].ref]);\n }\n }\n return layers;\n}\n\n/**\n * Deeply compares two object literals.\n *\n * @private\n */\nfunction deepEqual(a, b) {\n if (Array.isArray(a)) {\n if (!Array.isArray(b) || a.length !== b.length)\n return false;\n for (let i = 0; i < a.length; i++) {\n if (!deepEqual(a[i], b[i]))\n return false;\n }\n return true;\n }\n if (typeof a === 'object' && a !== null && b !== null) {\n if (!(typeof b === 'object'))\n return false;\n const keys = Object.keys(a);\n if (keys.length !== Object.keys(b).length)\n return false;\n for (const key in a) {\n if (!deepEqual(a[key], b[key]))\n return false;\n }\n return true;\n }\n return a === b;\n}\n\n/**\n * The main reason for this method is to allow type check when adding a command to the array.\n * @param commands - The commands array to add to\n * @param command - The command to add\n */\nfunction addCommand(commands, command) {\n commands.push(command);\n}\nfunction addSource(sourceId, after, commands) {\n addCommand(commands, { command: 'addSource', args: [sourceId, after[sourceId]] });\n}\nfunction removeSource(sourceId, commands, sourcesRemoved) {\n addCommand(commands, { command: 'removeSource', args: [sourceId] });\n sourcesRemoved[sourceId] = true;\n}\nfunction updateSource(sourceId, after, commands, sourcesRemoved) {\n removeSource(sourceId, commands, sourcesRemoved);\n addSource(sourceId, after, commands);\n}\nfunction canUpdateGeoJSON(before, after, sourceId) {\n let prop;\n for (prop in before[sourceId]) {\n if (!Object.prototype.hasOwnProperty.call(before[sourceId], prop))\n continue;\n if (prop !== 'data' && !deepEqual(before[sourceId][prop], after[sourceId][prop])) {\n return false;\n }\n }\n for (prop in after[sourceId]) {\n if (!Object.prototype.hasOwnProperty.call(after[sourceId], prop))\n continue;\n if (prop !== 'data' && !deepEqual(before[sourceId][prop], after[sourceId][prop])) {\n return false;\n }\n }\n return true;\n}\nfunction diffSources(before, after, commands, sourcesRemoved) {\n before = before || {};\n after = after || {};\n let sourceId;\n // look for sources to remove\n for (sourceId in before) {\n if (!Object.prototype.hasOwnProperty.call(before, sourceId))\n continue;\n if (!Object.prototype.hasOwnProperty.call(after, sourceId)) {\n removeSource(sourceId, commands, sourcesRemoved);\n }\n }\n // look for sources to add/update\n for (sourceId in after) {\n if (!Object.prototype.hasOwnProperty.call(after, sourceId))\n continue;\n if (!Object.prototype.hasOwnProperty.call(before, sourceId)) {\n addSource(sourceId, after, commands);\n }\n else if (!deepEqual(before[sourceId], after[sourceId])) {\n if (before[sourceId].type === 'geojson' &&\n after[sourceId].type === 'geojson' &&\n canUpdateGeoJSON(before, after, sourceId)) {\n addCommand(commands, {\n command: 'setGeoJSONSourceData',\n args: [sourceId, after[sourceId].data]\n });\n }\n else {\n // no update command, must remove then add\n updateSource(sourceId, after, commands, sourcesRemoved);\n }\n }\n }\n}\nfunction diffLayerPropertyChanges(before, after, commands, layerId, klass, command) {\n before = before || {};\n after = after || {};\n for (const prop in before) {\n if (!Object.prototype.hasOwnProperty.call(before, prop))\n continue;\n if (!deepEqual(before[prop], after[prop])) {\n commands.push({ command, args: [layerId, prop, after[prop], klass] });\n }\n }\n for (const prop in after) {\n if (!Object.prototype.hasOwnProperty.call(after, prop) ||\n Object.prototype.hasOwnProperty.call(before, prop))\n continue;\n if (!deepEqual(before[prop], after[prop])) {\n commands.push({ command, args: [layerId, prop, after[prop], klass] });\n }\n }\n}\nfunction pluckId(layer) {\n return layer.id;\n}\nfunction indexById(group, layer) {\n group[layer.id] = layer;\n return group;\n}\nfunction diffLayers(before, after, commands) {\n before = before || [];\n after = after || [];\n // order of layers by id\n const beforeOrder = before.map(pluckId);\n const afterOrder = after.map(pluckId);\n // index of layer by id\n const beforeIndex = before.reduce(indexById, {});\n const afterIndex = after.reduce(indexById, {});\n // track order of layers as if they have been mutated\n const tracker = beforeOrder.slice();\n // layers that have been added do not need to be diffed\n const clean = Object.create(null);\n let layerId;\n let beforeLayer;\n let afterLayer;\n let insertBeforeLayerId;\n let prop;\n // remove layers\n for (let i = 0, d = 0; i < beforeOrder.length; i++) {\n layerId = beforeOrder[i];\n if (!Object.prototype.hasOwnProperty.call(afterIndex, layerId)) {\n addCommand(commands, { command: 'removeLayer', args: [layerId] });\n tracker.splice(tracker.indexOf(layerId, d), 1);\n }\n else {\n // limit where in tracker we need to look for a match\n d++;\n }\n }\n // add/reorder layers\n for (let i = 0, d = 0; i < afterOrder.length; i++) {\n // work backwards as insert is before an existing layer\n layerId = afterOrder[afterOrder.length - 1 - i];\n if (tracker[tracker.length - 1 - i] === layerId)\n continue;\n if (Object.prototype.hasOwnProperty.call(beforeIndex, layerId)) {\n // remove the layer before we insert at the correct position\n addCommand(commands, { command: 'removeLayer', args: [layerId] });\n tracker.splice(tracker.lastIndexOf(layerId, tracker.length - d), 1);\n }\n else {\n // limit where in tracker we need to look for a match\n d++;\n }\n // add layer at correct position\n insertBeforeLayerId = tracker[tracker.length - i];\n addCommand(commands, {\n command: 'addLayer',\n args: [afterIndex[layerId], insertBeforeLayerId]\n });\n tracker.splice(tracker.length - i, 0, layerId);\n clean[layerId] = true;\n }\n // update layers\n for (let i = 0; i < afterOrder.length; i++) {\n layerId = afterOrder[i];\n beforeLayer = beforeIndex[layerId];\n afterLayer = afterIndex[layerId];\n // no need to update if previously added (new or moved)\n if (clean[layerId] || deepEqual(beforeLayer, afterLayer))\n continue;\n // If source, source-layer, or type have changes, then remove the layer\n // and add it back 'from scratch'.\n if (!deepEqual(beforeLayer.source, afterLayer.source) ||\n !deepEqual(beforeLayer['source-layer'], afterLayer['source-layer']) ||\n !deepEqual(beforeLayer.type, afterLayer.type)) {\n addCommand(commands, { command: 'removeLayer', args: [layerId] });\n // we add the layer back at the same position it was already in, so\n // there's no need to update the `tracker`\n insertBeforeLayerId = tracker[tracker.lastIndexOf(layerId) + 1];\n addCommand(commands, { command: 'addLayer', args: [afterLayer, insertBeforeLayerId] });\n continue;\n }\n // layout, paint, filter, minzoom, maxzoom\n diffLayerPropertyChanges(beforeLayer.layout, afterLayer.layout, commands, layerId, null, 'setLayoutProperty');\n diffLayerPropertyChanges(beforeLayer.paint, afterLayer.paint, commands, layerId, null, 'setPaintProperty');\n if (!deepEqual(beforeLayer.filter, afterLayer.filter)) {\n addCommand(commands, { command: 'setFilter', args: [layerId, afterLayer.filter] });\n }\n if (!deepEqual(beforeLayer.minzoom, afterLayer.minzoom) ||\n !deepEqual(beforeLayer.maxzoom, afterLayer.maxzoom)) {\n addCommand(commands, {\n command: 'setLayerZoomRange',\n args: [layerId, afterLayer.minzoom, afterLayer.maxzoom]\n });\n }\n // handle all other layer props, including paint.*\n for (prop in beforeLayer) {\n if (!Object.prototype.hasOwnProperty.call(beforeLayer, prop))\n continue;\n if (prop === 'layout' ||\n prop === 'paint' ||\n prop === 'filter' ||\n prop === 'metadata' ||\n prop === 'minzoom' ||\n prop === 'maxzoom')\n continue;\n if (prop.indexOf('paint.') === 0) {\n diffLayerPropertyChanges(beforeLayer[prop], afterLayer[prop], commands, layerId, prop.slice(6), 'setPaintProperty');\n }\n else if (!deepEqual(beforeLayer[prop], afterLayer[prop])) {\n addCommand(commands, {\n command: 'setLayerProperty',\n args: [layerId, prop, afterLayer[prop]]\n });\n }\n }\n for (prop in afterLayer) {\n if (!Object.prototype.hasOwnProperty.call(afterLayer, prop) ||\n Object.prototype.hasOwnProperty.call(beforeLayer, prop))\n continue;\n if (prop === 'layout' ||\n prop === 'paint' ||\n prop === 'filter' ||\n prop === 'metadata' ||\n prop === 'minzoom' ||\n prop === 'maxzoom')\n continue;\n if (prop.indexOf('paint.') === 0) {\n diffLayerPropertyChanges(beforeLayer[prop], afterLayer[prop], commands, layerId, prop.slice(6), 'setPaintProperty');\n }\n else if (!deepEqual(beforeLayer[prop], afterLayer[prop])) {\n addCommand(commands, {\n command: 'setLayerProperty',\n args: [layerId, prop, afterLayer[prop]]\n });\n }\n }\n }\n}\n/**\n * Diff two stylesheet\n *\n * Creates semanticly aware diffs that can easily be applied at runtime.\n * Operations produced by the diff closely resemble the maplibre-gl-js API. Any\n * error creating the diff will fall back to the 'setStyle' operation.\n *\n * Example diff:\n * [\n * { command: 'setConstant', args: ['@water', '#0000FF'] },\n * { command: 'setPaintProperty', args: ['background', 'background-color', 'black'] }\n * ]\n *\n * @private\n * @param {*} [before] stylesheet to compare from\n * @param {*} after stylesheet to compare to\n * @returns Array list of changes\n */\nfunction diff(before, after) {\n if (!before)\n return [{ command: 'setStyle', args: [after] }];\n let commands = [];\n try {\n // Handle changes to top-level properties\n if (!deepEqual(before.version, after.version)) {\n return [{ command: 'setStyle', args: [after] }];\n }\n if (!deepEqual(before.center, after.center)) {\n commands.push({ command: 'setCenter', args: [after.center] });\n }\n if (!deepEqual(before.state, after.state)) {\n commands.push({ command: 'setGlobalState', args: [after.state] });\n }\n if (!deepEqual(before.centerAltitude, after.centerAltitude)) {\n commands.push({ command: 'setCenterAltitude', args: [after.centerAltitude] });\n }\n if (!deepEqual(before.zoom, after.zoom)) {\n commands.push({ command: 'setZoom', args: [after.zoom] });\n }\n if (!deepEqual(before.bearing, after.bearing)) {\n commands.push({ command: 'setBearing', args: [after.bearing] });\n }\n if (!deepEqual(before.pitch, after.pitch)) {\n commands.push({ command: 'setPitch', args: [after.pitch] });\n }\n if (!deepEqual(before.roll, after.roll)) {\n commands.push({ command: 'setRoll', args: [after.roll] });\n }\n if (!deepEqual(before.sprite, after.sprite)) {\n commands.push({ command: 'setSprite', args: [after.sprite] });\n }\n if (!deepEqual(before.glyphs, after.glyphs)) {\n commands.push({ command: 'setGlyphs', args: [after.glyphs] });\n }\n if (!deepEqual(before.transition, after.transition)) {\n commands.push({ command: 'setTransition', args: [after.transition] });\n }\n if (!deepEqual(before.light, after.light)) {\n commands.push({ command: 'setLight', args: [after.light] });\n }\n if (!deepEqual(before.terrain, after.terrain)) {\n commands.push({ command: 'setTerrain', args: [after.terrain] });\n }\n if (!deepEqual(before.sky, after.sky)) {\n commands.push({ command: 'setSky', args: [after.sky] });\n }\n if (!deepEqual(before.projection, after.projection)) {\n commands.push({ command: 'setProjection', args: [after.projection] });\n }\n // Handle changes to `sources`\n // If a source is to be removed, we also--before the removeSource\n // command--need to remove all the style layers that depend on it.\n const sourcesRemoved = {};\n // First collect the {add,remove}Source commands\n const removeOrAddSourceCommands = [];\n diffSources(before.sources, after.sources, removeOrAddSourceCommands, sourcesRemoved);\n // Push a removeLayer command for each style layer that depends on a\n // source that's being removed.\n // Also, exclude any such layers them from the input to `diffLayers`\n // below, so that diffLayers produces the appropriate `addLayers`\n // command\n const beforeLayers = [];\n if (before.layers) {\n before.layers.forEach((layer) => {\n if ('source' in layer && sourcesRemoved[layer.source]) {\n commands.push({ command: 'removeLayer', args: [layer.id] });\n }\n else {\n beforeLayers.push(layer);\n }\n });\n }\n commands = commands.concat(removeOrAddSourceCommands);\n // Handle changes to `layers`\n diffLayers(beforeLayers, after.layers, commands);\n }\n catch (e) {\n // fall back to setStyle\n console.warn('Unable to compute style diff:', e);\n commands = [{ command: 'setStyle', args: [after] }];\n }\n return commands;\n}\n\n// Note: Do not inherit from Error. It breaks when transpiling to ES5.\nclass ValidationError {\n constructor(key, value, message, identifier) {\n this.message = (key ? `${key}: ` : '') + message;\n if (identifier)\n this.identifier = identifier;\n if (value !== null && value !== undefined && value.__line__) {\n this.line = value.__line__;\n }\n }\n}\n\n// Note: Do not inherit from Error. It breaks when transpiling to ES5.\nclass ParsingError {\n constructor(error) {\n this.error = error;\n this.message = error.message;\n const match = error.message.match(/line (\\d+)/);\n this.line = match ? parseInt(match[1], 10) : 0;\n }\n}\n\nfunction extendBy(output, ...inputs) {\n for (const input of inputs) {\n for (const k in input) {\n output[k] = input[k];\n }\n }\n return output;\n}\n\nclass ExpressionParsingError extends Error {\n constructor(key, message) {\n super(message);\n this.message = message;\n this.key = key;\n }\n}\n\n/**\n * Tracks `let` bindings during expression parsing.\n * @private\n */\nclass Scope {\n constructor(parent, bindings = []) {\n this.parent = parent;\n this.bindings = {};\n for (const [name, expression] of bindings) {\n this.bindings[name] = expression;\n }\n }\n concat(bindings) {\n return new Scope(this, bindings);\n }\n get(name) {\n if (this.bindings[name]) {\n return this.bindings[name];\n }\n if (this.parent) {\n return this.parent.get(name);\n }\n throw new Error(`${name} not found in scope.`);\n }\n has(name) {\n if (this.bindings[name])\n return true;\n return this.parent ? this.parent.has(name) : false;\n }\n}\n\nconst NullType = { kind: 'null' };\nconst NumberType = { kind: 'number' };\nconst StringType = { kind: 'string' };\nconst BooleanType = { kind: 'boolean' };\nconst ColorType = { kind: 'color' };\nconst ProjectionDefinitionType = {\n kind: 'projectionDefinition'\n};\nconst ObjectType = { kind: 'object' };\nconst ValueType = { kind: 'value' };\nconst ErrorType = { kind: 'error' };\nconst CollatorType = { kind: 'collator' };\nconst FormattedType = { kind: 'formatted' };\nconst PaddingType = { kind: 'padding' };\nconst ColorArrayType = { kind: 'colorArray' };\nconst NumberArrayType = { kind: 'numberArray' };\nconst ResolvedImageType = { kind: 'resolvedImage' };\nconst VariableAnchorOffsetCollectionType = {\n kind: 'variableAnchorOffsetCollection'\n};\nfunction array(itemType, N) {\n return {\n kind: 'array',\n itemType,\n N\n };\n}\nfunction typeToString(type) {\n if (type.kind === 'array') {\n const itemType = typeToString(type.itemType);\n return typeof type.N === 'number'\n ? `array<${itemType}, ${type.N}>`\n : type.itemType.kind === 'value'\n ? 'array'\n : `array<${itemType}>`;\n }\n else {\n return type.kind;\n }\n}\nconst valueMemberTypes = [\n NullType,\n NumberType,\n StringType,\n BooleanType,\n ColorType,\n ProjectionDefinitionType,\n FormattedType,\n ObjectType,\n array(ValueType),\n PaddingType,\n NumberArrayType,\n ColorArrayType,\n ResolvedImageType,\n VariableAnchorOffsetCollectionType\n];\n/**\n * Returns null if `t` is a subtype of `expected`; otherwise returns an\n * error message.\n * @private\n */\nfunction checkSubtype(expected, t) {\n if (t.kind === 'error') {\n // Error is a subtype of every type\n return null;\n }\n else if (expected.kind === 'array') {\n if (t.kind === 'array' &&\n ((t.N === 0 && t.itemType.kind === 'value') ||\n !checkSubtype(expected.itemType, t.itemType)) &&\n (typeof expected.N !== 'number' || expected.N === t.N)) {\n return null;\n }\n }\n else if (expected.kind === t.kind) {\n return null;\n }\n else if (expected.kind === 'value') {\n for (const memberType of valueMemberTypes) {\n if (!checkSubtype(memberType, t)) {\n return null;\n }\n }\n }\n return `Expected ${typeToString(expected)} but found ${typeToString(t)} instead.`;\n}\nfunction isValidType(provided, allowedTypes) {\n return allowedTypes.some((t) => t.kind === provided.kind);\n}\nfunction isValidNativeType(provided, allowedTypes) {\n return allowedTypes.some((t) => {\n if (t === 'null') {\n return provided === null;\n }\n else if (t === 'array') {\n return Array.isArray(provided);\n }\n else if (t === 'object') {\n return provided && !Array.isArray(provided) && typeof provided === 'object';\n }\n else {\n return t === typeof provided;\n }\n });\n}\n/**\n * Verify whether the specified type is of the same type as the specified sample.\n *\n * @param provided Type to verify\n * @param sample Sample type to reference\n * @returns `true` if both objects are of the same type, `false` otherwise\n * @example basic types\n * if (verifyType(outputType, ValueType)) {\n * // type narrowed to:\n * outputType.kind; // 'value'\n * }\n * @example array types\n * if (verifyType(outputType, array(NumberType))) {\n * // type narrowed to:\n * outputType.kind; // 'array'\n * outputType.itemType; // NumberTypeT\n * outputType.itemType.kind; // 'number'\n * }\n */\nfunction verifyType(provided, sample) {\n if (provided.kind === 'array' && sample.kind === 'array') {\n return provided.itemType.kind === sample.itemType.kind && typeof provided.N === 'number';\n }\n return provided.kind === sample.kind;\n}\n\n// See https://observablehq.com/@mbostock/lab-and-rgb\nconst Xn = 0.96422, Yn = 1, Zn = 0.82521, t0 = 4 / 29, t1 = 6 / 29, t2 = 3 * t1 * t1, t3 = t1 * t1 * t1, deg2rad = Math.PI / 180, rad2deg = 180 / Math.PI;\nfunction constrainAngle(angle) {\n angle = angle % 360;\n if (angle < 0) {\n angle += 360;\n }\n return angle;\n}\nfunction rgbToLab([r, g, b, alpha]) {\n r = rgb2xyz(r);\n g = rgb2xyz(g);\n b = rgb2xyz(b);\n let x, z;\n const y = xyz2lab((0.2225045 * r + 0.7168786 * g + 0.0606169 * b) / Yn);\n if (r === g && g === b) {\n x = z = y;\n }\n else {\n x = xyz2lab((0.4360747 * r + 0.3850649 * g + 0.1430804 * b) / Xn);\n z = xyz2lab((0.0139322 * r + 0.0971045 * g + 0.7141733 * b) / Zn);\n }\n const l = 116 * y - 16;\n return [l < 0 ? 0 : l, 500 * (x - y), 200 * (y - z), alpha];\n}\nfunction rgb2xyz(x) {\n return x <= 0.04045 ? x / 12.92 : Math.pow((x + 0.055) / 1.055, 2.4);\n}\nfunction xyz2lab(t) {\n return t > t3 ? Math.pow(t, 1 / 3) : t / t2 + t0;\n}\nfunction labToRgb([l, a, b, alpha]) {\n let y = (l + 16) / 116, x = isNaN(a) ? y : y + a / 500, z = isNaN(b) ? y : y - b / 200;\n y = Yn * lab2xyz(y);\n x = Xn * lab2xyz(x);\n z = Zn * lab2xyz(z);\n return [\n xyz2rgb(3.1338561 * x - 1.6168667 * y - 0.4906146 * z), // D50 -> sRGB\n xyz2rgb(-0.9787684 * x + 1.9161415 * y + 0.033454 * z),\n xyz2rgb(0.0719453 * x - 0.2289914 * y + 1.4052427 * z),\n alpha\n ];\n}\nfunction xyz2rgb(x) {\n x = x <= 0.00304 ? 12.92 * x : 1.055 * Math.pow(x, 1 / 2.4) - 0.055;\n return x < 0 ? 0 : x > 1 ? 1 : x; // clip to 0..1 range\n}\nfunction lab2xyz(t) {\n return t > t1 ? t * t * t : t2 * (t - t0);\n}\nfunction rgbToHcl(rgbColor) {\n const [l, a, b, alpha] = rgbToLab(rgbColor);\n const c = Math.sqrt(a * a + b * b);\n const h = Math.round(c * 10000) ? constrainAngle(Math.atan2(b, a) * rad2deg) : NaN;\n return [h, c, l, alpha];\n}\nfunction hclToRgb([h, c, l, alpha]) {\n h = isNaN(h) ? 0 : h * deg2rad;\n return labToRgb([l, Math.cos(h) * c, Math.sin(h) * c, alpha]);\n}\n// https://drafts.csswg.org/css-color-4/#hsl-to-rgb\nfunction hslToRgb([h, s, l, alpha]) {\n h = constrainAngle(h);\n s /= 100;\n l /= 100;\n function f(n) {\n const k = (n + h / 30) % 12;\n const a = s * Math.min(l, 1 - l);\n return l - a * Math.max(-1, Math.min(k - 3, 9 - k, 1));\n }\n return [f(0), f(8), f(4), alpha];\n}\n\n// polyfill for Object.hasOwn\nconst hasOwnProperty = Object.hasOwn ||\n function hasOwnProperty(object, key) {\n return Object.prototype.hasOwnProperty.call(object, key);\n };\nfunction getOwn(object, key) {\n return hasOwnProperty(object, key) ? object[key] : undefined;\n}\n\n/**\n * CSS color parser compliant with CSS Color 4 Specification.\n * Supports: named colors, `transparent` keyword, all rgb hex notations,\n * rgb(), rgba(), hsl() and hsla() functions.\n * Does not round the parsed values to integers from the range 0..255.\n *\n * Syntax:\n *\n * = | \n * = | \n *\n * rgb() = rgb( {3} [ / ]? ) | rgb( {3} [ / ]? )\n * rgb() = rgb( #{3} , ? ) | rgb( #{3} , ? )\n *\n * hsl() = hsl( [ / ]? )\n * hsl() = hsl( , , , ? )\n *\n * Caveats:\n * - - with optional `deg` suffix; `grad`, `rad`, `turn` are not supported\n * - `none` keyword is not supported\n * - comments inside rgb()/hsl() are not supported\n * - legacy color syntax rgba() is supported with an identical grammar and behavior to rgb()\n * - legacy color syntax hsla() is supported with an identical grammar and behavior to hsl()\n *\n * @param input CSS color string to parse.\n * @returns Color in sRGB color space, with `red`, `green`, `blue`\n * and `alpha` channels normalized to the range 0..1,\n * or `undefined` if the input is not a valid color string.\n */\nfunction parseCssColor(input) {\n input = input.toLowerCase().trim();\n if (input === 'transparent') {\n return [0, 0, 0, 0];\n }\n // 'white', 'black', 'blue'\n const namedColorsMatch = getOwn(namedColors, input);\n if (namedColorsMatch) {\n const [r, g, b] = namedColorsMatch;\n return [r / 255, g / 255, b / 255, 1];\n }\n // #f0c, #f0cf, #ff00cc, #ff00ccff\n if (input.startsWith('#')) {\n const hexRegexp = /^#(?:[0-9a-f]{3,4}|[0-9a-f]{6}|[0-9a-f]{8})$/;\n if (hexRegexp.test(input)) {\n const step = input.length < 6 ? 1 : 2;\n let i = 1;\n return [\n parseHex(input.slice(i, (i += step))),\n parseHex(input.slice(i, (i += step))),\n parseHex(input.slice(i, (i += step))),\n parseHex(input.slice(i, i + step) || 'ff')\n ];\n }\n }\n // rgb(128 0 0), rgb(50% 0% 0%), rgba(255,0,255,0.6), rgb(255 0 255 / 60%), rgb(100% 0% 100% /.6)\n if (input.startsWith('rgb')) {\n const rgbRegExp = /^rgba?\\(\\s*([\\de.+-]+)(%)?(?:\\s+|\\s*(,)\\s*)([\\de.+-]+)(%)?(?:\\s+|\\s*(,)\\s*)([\\de.+-]+)(%)?(?:\\s*([,\\/])\\s*([\\de.+-]+)(%)?)?\\s*\\)$/;\n const rgbMatch = input.match(rgbRegExp);\n if (rgbMatch) {\n const [_, // eslint-disable-line @typescript-eslint/no-unused-vars\n r, // \n rp, // % (optional)\n f1, // , (optional)\n g, // \n gp, // % (optional)\n f2, // , (optional)\n b, // \n bp, // % (optional)\n f3, // ,|/ (optional)\n a, // (optional)\n ap // % (optional)\n ] = rgbMatch;\n const argFormat = [f1 || ' ', f2 || ' ', f3].join('');\n if (argFormat === ' ' ||\n argFormat === ' /' ||\n argFormat === ',,' ||\n argFormat === ',,,') {\n const valFormat = [rp, gp, bp].join('');\n const maxValue = valFormat === '%%%' ? 100 : valFormat === '' ? 255 : 0;\n if (maxValue) {\n const rgba = [\n clamp(+r / maxValue, 0, 1),\n clamp(+g / maxValue, 0, 1),\n clamp(+b / maxValue, 0, 1),\n a ? parseAlpha(+a, ap) : 1\n ];\n if (validateNumbers(rgba)) {\n return rgba;\n }\n // invalid numbers\n }\n // values must be all numbers or all percentages\n }\n return; // comma optional syntax requires no commas at all\n }\n }\n // hsl(120 50% 80%), hsla(120deg,50%,80%,.9), hsl(12e1 50% 80% / 90%)\n const hslRegExp = /^hsla?\\(\\s*([\\de.+-]+)(?:deg)?(?:\\s+|\\s*(,)\\s*)([\\de.+-]+)%(?:\\s+|\\s*(,)\\s*)([\\de.+-]+)%(?:\\s*([,\\/])\\s*([\\de.+-]+)(%)?)?\\s*\\)$/;\n const hslMatch = input.match(hslRegExp);\n if (hslMatch) {\n const [_, // eslint-disable-line @typescript-eslint/no-unused-vars\n h, // \n f1, // , (optional)\n s, // \n f2, // , (optional)\n l, // \n f3, // ,|/ (optional)\n a, // (optional)\n ap // % (optional)\n ] = hslMatch;\n const argFormat = [f1 || ' ', f2 || ' ', f3].join('');\n if (argFormat === ' ' ||\n argFormat === ' /' ||\n argFormat === ',,' ||\n argFormat === ',,,') {\n const hsla = [\n +h,\n clamp(+s, 0, 100),\n clamp(+l, 0, 100),\n a ? parseAlpha(+a, ap) : 1\n ];\n if (validateNumbers(hsla)) {\n return hslToRgb(hsla);\n }\n // invalid numbers\n }\n // comma optional syntax requires no commas at all\n }\n}\nfunction parseHex(hex) {\n return parseInt(hex.padEnd(2, hex), 16) / 255;\n}\nfunction parseAlpha(a, asPercentage) {\n return clamp(asPercentage ? a / 100 : a, 0, 1);\n}\nfunction clamp(n, min, max) {\n return Math.min(Math.max(min, n), max);\n}\n/**\n * The regular expression for numeric values is not super specific, and it may\n * happen that it will accept a value that is not a valid number. In order to\n * detect and eliminate such values this function exists.\n *\n * @param array Array of uncertain numbers.\n * @returns `true` if the specified array contains only valid numbers, `false` otherwise.\n */\nfunction validateNumbers(array) {\n return !array.some(Number.isNaN);\n}\n/**\n * To generate:\n * - visit {@link https://www.w3.org/TR/css-color-4/#named-colors}\n * - run in the console:\n * @example\n * copy(`{\\n${[...document.querySelector('.named-color-table tbody').children].map((tr) => `${tr.cells[2].textContent.trim()}: [${tr.cells[4].textContent.trim().split(/\\s+/).join(', ')}],`).join('\\n')}\\n}`);\n */\nconst namedColors = {\n aliceblue: [240, 248, 255],\n antiquewhite: [250, 235, 215],\n aqua: [0, 255, 255],\n aquamarine: [127, 255, 212],\n azure: [240, 255, 255],\n beige: [245, 245, 220],\n bisque: [255, 228, 196],\n black: [0, 0, 0],\n blanchedalmond: [255, 235, 205],\n blue: [0, 0, 255],\n blueviolet: [138, 43, 226],\n brown: [165, 42, 42],\n burlywood: [222, 184, 135],\n cadetblue: [95, 158, 160],\n chartreuse: [127, 255, 0],\n chocolate: [210, 105, 30],\n coral: [255, 127, 80],\n cornflowerblue: [100, 149, 237],\n cornsilk: [255, 248, 220],\n crimson: [220, 20, 60],\n cyan: [0, 255, 255],\n darkblue: [0, 0, 139],\n darkcyan: [0, 139, 139],\n darkgoldenrod: [184, 134, 11],\n darkgray: [169, 169, 169],\n darkgreen: [0, 100, 0],\n darkgrey: [169, 169, 169],\n darkkhaki: [189, 183, 107],\n darkmagenta: [139, 0, 139],\n darkolivegreen: [85, 107, 47],\n darkorange: [255, 140, 0],\n darkorchid: [153, 50, 204],\n darkred: [139, 0, 0],\n darksalmon: [233, 150, 122],\n darkseagreen: [143, 188, 143],\n darkslateblue: [72, 61, 139],\n darkslategray: [47, 79, 79],\n darkslategrey: [47, 79, 79],\n darkturquoise: [0, 206, 209],\n darkviolet: [148, 0, 211],\n deeppink: [255, 20, 147],\n deepskyblue: [0, 191, 255],\n dimgray: [105, 105, 105],\n dimgrey: [105, 105, 105],\n dodgerblue: [30, 144, 255],\n firebrick: [178, 34, 34],\n floralwhite: [255, 250, 240],\n forestgreen: [34, 139, 34],\n fuchsia: [255, 0, 255],\n gainsboro: [220, 220, 220],\n ghostwhite: [248, 248, 255],\n gold: [255, 215, 0],\n goldenrod: [218, 165, 32],\n gray: [128, 128, 128],\n green: [0, 128, 0],\n greenyellow: [173, 255, 47],\n grey: [128, 128, 128],\n honeydew: [240, 255, 240],\n hotpink: [255, 105, 180],\n indianred: [205, 92, 92],\n indigo: [75, 0, 130],\n ivory: [255, 255, 240],\n khaki: [240, 230, 140],\n lavender: [230, 230, 250],\n lavenderblush: [255, 240, 245],\n lawngreen: [124, 252, 0],\n lemonchiffon: [255, 250, 205],\n lightblue: [173, 216, 230],\n lightcoral: [240, 128, 128],\n lightcyan: [224, 255, 255],\n lightgoldenrodyellow: [250, 250, 210],\n lightgray: [211, 211, 211],\n lightgreen: [144, 238, 144],\n lightgrey: [211, 211, 211],\n lightpink: [255, 182, 193],\n lightsalmon: [255, 160, 122],\n lightseagreen: [32, 178, 170],\n lightskyblue: [135, 206, 250],\n lightslategray: [119, 136, 153],\n lightslategrey: [119, 136, 153],\n lightsteelblue: [176, 196, 222],\n lightyellow: [255, 255, 224],\n lime: [0, 255, 0],\n limegreen: [50, 205, 50],\n linen: [250, 240, 230],\n magenta: [255, 0, 255],\n maroon: [128, 0, 0],\n mediumaquamarine: [102, 205, 170],\n mediumblue: [0, 0, 205],\n mediumorchid: [186, 85, 211],\n mediumpurple: [147, 112, 219],\n mediumseagreen: [60, 179, 113],\n mediumslateblue: [123, 104, 238],\n mediumspringgreen: [0, 250, 154],\n mediumturquoise: [72, 209, 204],\n mediumvioletred: [199, 21, 133],\n midnightblue: [25, 25, 112],\n mintcream: [245, 255, 250],\n mistyrose: [255, 228, 225],\n moccasin: [255, 228, 181],\n navajowhite: [255, 222, 173],\n navy: [0, 0, 128],\n oldlace: [253, 245, 230],\n olive: [128, 128, 0],\n olivedrab: [107, 142, 35],\n orange: [255, 165, 0],\n orangered: [255, 69, 0],\n orchid: [218, 112, 214],\n palegoldenrod: [238, 232, 170],\n palegreen: [152, 251, 152],\n paleturquoise: [175, 238, 238],\n palevioletred: [219, 112, 147],\n papayawhip: [255, 239, 213],\n peachpuff: [255, 218, 185],\n peru: [205, 133, 63],\n pink: [255, 192, 203],\n plum: [221, 160, 221],\n powderblue: [176, 224, 230],\n purple: [128, 0, 128],\n rebeccapurple: [102, 51, 153],\n red: [255, 0, 0],\n rosybrown: [188, 143, 143],\n royalblue: [65, 105, 225],\n saddlebrown: [139, 69, 19],\n salmon: [250, 128, 114],\n sandybrown: [244, 164, 96],\n seagreen: [46, 139, 87],\n seashell: [255, 245, 238],\n sienna: [160, 82, 45],\n silver: [192, 192, 192],\n skyblue: [135, 206, 235],\n slateblue: [106, 90, 205],\n slategray: [112, 128, 144],\n slategrey: [112, 128, 144],\n snow: [255, 250, 250],\n springgreen: [0, 255, 127],\n steelblue: [70, 130, 180],\n tan: [210, 180, 140],\n teal: [0, 128, 128],\n thistle: [216, 191, 216],\n tomato: [255, 99, 71],\n turquoise: [64, 224, 208],\n violet: [238, 130, 238],\n wheat: [245, 222, 179],\n white: [255, 255, 255],\n whitesmoke: [245, 245, 245],\n yellow: [255, 255, 0],\n yellowgreen: [154, 205, 50]\n};\n\nfunction interpolateNumber(from, to, t) {\n return from + t * (to - from);\n}\nfunction interpolateArray(from, to, t) {\n return from.map((d, i) => {\n return interpolateNumber(d, to[i], t);\n });\n}\n\n/**\n * Checks whether the specified color space is one of the supported interpolation color spaces.\n *\n * @param colorSpace Color space key to verify.\n * @returns `true` if the specified color space is one of the supported\n * interpolation color spaces, `false` otherwise\n */\nfunction isSupportedInterpolationColorSpace(colorSpace) {\n return colorSpace === 'rgb' || colorSpace === 'hcl' || colorSpace === 'lab';\n}\n/**\n * Color representation used by WebGL.\n * Defined in sRGB color space and pre-blended with alpha.\n * @private\n */\nclass Color {\n /**\n * @param r Red component premultiplied by `alpha` 0..1\n * @param g Green component premultiplied by `alpha` 0..1\n * @param b Blue component premultiplied by `alpha` 0..1\n * @param [alpha=1] Alpha component 0..1\n * @param [premultiplied=true] Whether the `r`, `g` and `b` values have already\n * been multiplied by alpha. If `true` nothing happens if `false` then they will\n * be multiplied automatically.\n */\n constructor(r, g, b, alpha = 1, premultiplied = true) {\n this.r = r;\n this.g = g;\n this.b = b;\n this.a = alpha;\n if (!premultiplied) {\n this.r *= alpha;\n this.g *= alpha;\n this.b *= alpha;\n if (!alpha) {\n // alpha = 0 erases completely rgb channels. This behavior is not desirable\n // if this particular color is later used in color interpolation.\n // Because of that, a reference to original color is saved.\n this.overwriteGetter('rgb', [r, g, b, alpha]);\n }\n }\n }\n /**\n * Parses CSS color strings and converts colors to sRGB color space if needed.\n * Officially supported color formats:\n * - keyword, e.g. 'aquamarine' or 'steelblue'\n * - hex (with 3, 4, 6 or 8 digits), e.g. '#f0f' or '#e9bebea9'\n * - rgb and rgba, e.g. 'rgb(0,240,120)' or 'rgba(0%,94%,47%,0.1)' or 'rgb(0 240 120 / .3)'\n * - hsl and hsla, e.g. 'hsl(0,0%,83%)' or 'hsla(0,0%,83%,.5)' or 'hsl(0 0% 83% / 20%)'\n *\n * @param input CSS color string to parse.\n * @returns A `Color` instance, or `undefined` if the input is not a valid color string.\n */\n static parse(input) {\n // in zoom-and-property function input could be an instance of Color class\n if (input instanceof Color) {\n return input;\n }\n if (typeof input !== 'string') {\n return;\n }\n const rgba = parseCssColor(input);\n if (rgba) {\n return new Color(...rgba, false);\n }\n }\n /**\n * Used in color interpolation and by 'to-rgba' expression.\n *\n * @returns Gien color, with reversed alpha blending, in sRGB color space.\n */\n get rgb() {\n const { r, g, b, a } = this;\n const f = a || Infinity; // reverse alpha blending factor\n return this.overwriteGetter('rgb', [r / f, g / f, b / f, a]);\n }\n /**\n * Used in color interpolation.\n *\n * @returns Gien color, with reversed alpha blending, in HCL color space.\n */\n get hcl() {\n return this.overwriteGetter('hcl', rgbToHcl(this.rgb));\n }\n /**\n * Used in color interpolation.\n *\n * @returns Gien color, with reversed alpha blending, in LAB color space.\n */\n get lab() {\n return this.overwriteGetter('lab', rgbToLab(this.rgb));\n }\n /**\n * Lazy getter pattern. When getter is called for the first time lazy value\n * is calculated and then overwrites getter function in given object instance.\n *\n * @example:\n * const redColor = Color.parse('red');\n * let x = redColor.hcl; // this will invoke `get hcl()`, which will calculate\n * // the value of red in HCL space and invoke this `overwriteGetter` function\n * // which in turn will set a field with a key 'hcl' in the `redColor` object.\n * // In other words it will override `get hcl()` from its `Color` prototype\n * // with its own property: hcl = [calculated red value in hcl].\n * let y = redColor.hcl; // next call will no longer invoke getter but simply\n * // return the previously calculated value\n * x === y; // true - `x` is exactly the same object as `y`\n *\n * @param getterKey Getter key\n * @param lazyValue Lazily calculated value to be memoized by current instance\n * @private\n */\n overwriteGetter(getterKey, lazyValue) {\n Object.defineProperty(this, getterKey, { value: lazyValue });\n return lazyValue;\n }\n /**\n * Used by 'to-string' expression.\n *\n * @returns Serialized color in format `rgba(r,g,b,a)`\n * where r,g,b are numbers within 0..255 and alpha is number within 1..0\n *\n * @example\n * var purple = new Color.parse('purple');\n * purple.toString; // = \"rgba(128,0,128,1)\"\n * var translucentGreen = new Color.parse('rgba(26, 207, 26, .73)');\n * translucentGreen.toString(); // = \"rgba(26,207,26,0.73)\"\n */\n toString() {\n const [r, g, b, a] = this.rgb;\n return `rgba(${[r, g, b].map((n) => Math.round(n * 255)).join(',')},${a})`;\n }\n static interpolate(from, to, t, spaceKey = 'rgb') {\n switch (spaceKey) {\n case 'rgb': {\n const [r, g, b, alpha] = interpolateArray(from.rgb, to.rgb, t);\n return new Color(r, g, b, alpha, false);\n }\n case 'hcl': {\n const [hue0, chroma0, light0, alphaF] = from.hcl;\n const [hue1, chroma1, light1, alphaT] = to.hcl;\n // https://github.com/gka/chroma.js/blob/cd1b3c0926c7a85cbdc3b1453b3a94006de91a92/src/interpolator/_hsx.js\n let hue, chroma;\n if (!isNaN(hue0) && !isNaN(hue1)) {\n let dh = hue1 - hue0;\n if (hue1 > hue0 && dh > 180) {\n dh -= 360;\n }\n else if (hue1 < hue0 && hue0 - hue1 > 180) {\n dh += 360;\n }\n hue = hue0 + t * dh;\n }\n else if (!isNaN(hue0)) {\n hue = hue0;\n if (light1 === 1 || light1 === 0)\n chroma = chroma0;\n }\n else if (!isNaN(hue1)) {\n hue = hue1;\n if (light0 === 1 || light0 === 0)\n chroma = chroma1;\n }\n else {\n hue = NaN;\n }\n const [r, g, b, alpha] = hclToRgb([\n hue,\n chroma !== null && chroma !== void 0 ? chroma : interpolateNumber(chroma0, chroma1, t),\n interpolateNumber(light0, light1, t),\n interpolateNumber(alphaF, alphaT, t)\n ]);\n return new Color(r, g, b, alpha, false);\n }\n case 'lab': {\n const [r, g, b, alpha] = labToRgb(interpolateArray(from.lab, to.lab, t));\n return new Color(r, g, b, alpha, false);\n }\n }\n }\n}\nColor.black = new Color(0, 0, 0, 1);\nColor.white = new Color(1, 1, 1, 1);\nColor.transparent = new Color(0, 0, 0, 0);\nColor.red = new Color(1, 0, 0, 1);\n\nclass Collator {\n constructor(caseSensitive, diacriticSensitive, locale) {\n if (caseSensitive)\n this.sensitivity = diacriticSensitive ? 'variant' : 'case';\n else\n this.sensitivity = diacriticSensitive ? 'accent' : 'base';\n this.locale = locale;\n this.collator = new Intl.Collator(this.locale ? this.locale : [], {\n sensitivity: this.sensitivity,\n usage: 'search'\n });\n }\n compare(lhs, rhs) {\n return this.collator.compare(lhs, rhs);\n }\n resolvedLocale() {\n // We create a Collator without \"usage: search\" because we don't want\n // the search options encoded in our result (e.g. \"en-u-co-search\")\n return new Intl.Collator(this.locale ? this.locale : []).resolvedOptions().locale;\n }\n}\n\nconst VERTICAL_ALIGN_OPTIONS = ['bottom', 'center', 'top'];\nclass FormattedSection {\n constructor(text, image, scale, fontStack, textColor, verticalAlign) {\n this.text = text;\n this.image = image;\n this.scale = scale;\n this.fontStack = fontStack;\n this.textColor = textColor;\n this.verticalAlign = verticalAlign;\n }\n}\nclass Formatted {\n constructor(sections) {\n this.sections = sections;\n }\n static fromString(unformatted) {\n return new Formatted([new FormattedSection(unformatted, null, null, null, null, null)]);\n }\n isEmpty() {\n if (this.sections.length === 0)\n return true;\n return !this.sections.some((section) => section.text.length !== 0 || (section.image && section.image.name.length !== 0));\n }\n static factory(text) {\n if (text instanceof Formatted) {\n return text;\n }\n else {\n return Formatted.fromString(text);\n }\n }\n toString() {\n if (this.sections.length === 0)\n return '';\n return this.sections.map((section) => section.text).join('');\n }\n}\n\n/**\n * A set of four numbers representing padding around a box. Create instances from\n * bare arrays or numeric values using the static method `Padding.parse`.\n * @private\n */\nclass Padding {\n constructor(values) {\n this.values = values.slice();\n }\n /**\n * Numeric padding values\n * @param input A padding value\n * @returns A `Padding` instance, or `undefined` if the input is not a valid padding value.\n */\n static parse(input) {\n if (input instanceof Padding) {\n return input;\n }\n // Backwards compatibility: bare number is treated the same as array with single value.\n // Padding applies to all four sides.\n if (typeof input === 'number') {\n return new Padding([input, input, input, input]);\n }\n if (!Array.isArray(input)) {\n return undefined;\n }\n if (input.length < 1 || input.length > 4) {\n return undefined;\n }\n for (const val of input) {\n if (typeof val !== 'number') {\n return undefined;\n }\n }\n // Expand shortcut properties into explicit 4-sided values\n switch (input.length) {\n case 1:\n input = [input[0], input[0], input[0], input[0]];\n break;\n case 2:\n input = [input[0], input[1], input[0], input[1]];\n break;\n case 3:\n input = [input[0], input[1], input[2], input[1]];\n break;\n }\n return new Padding(input);\n }\n toString() {\n return JSON.stringify(this.values);\n }\n static interpolate(from, to, t) {\n return new Padding(interpolateArray(from.values, to.values, t));\n }\n}\n\n/**\n * An array of numbers. Create instances from\n * bare arrays or numeric values using the static method `NumberArray.parse`.\n * @private\n */\nclass NumberArray {\n constructor(values) {\n this.values = values.slice();\n }\n /**\n * Numeric NumberArray values\n * @param input A NumberArray value\n * @returns A `NumberArray` instance, or `undefined` if the input is not a valid NumberArray value.\n */\n static parse(input) {\n if (input instanceof NumberArray) {\n return input;\n }\n // Backwards compatibility (e.g. hillshade-illumination-direction): bare number is treated the same as array with single value.\n if (typeof input === 'number') {\n return new NumberArray([input]);\n }\n if (!Array.isArray(input)) {\n return undefined;\n }\n for (const val of input) {\n if (typeof val !== 'number') {\n return undefined;\n }\n }\n return new NumberArray(input);\n }\n toString() {\n return JSON.stringify(this.values);\n }\n static interpolate(from, to, t) {\n return new NumberArray(interpolateArray(from.values, to.values, t));\n }\n}\n\n/**\n * An array of colors. Create instances from\n * bare arrays or strings using the static method `ColorArray.parse`.\n * @private\n */\nclass ColorArray {\n constructor(values) {\n this.values = values.slice();\n }\n /**\n * ColorArray values\n * @param input A ColorArray value\n * @returns A `ColorArray` instance, or `undefined` if the input is not a valid ColorArray value.\n */\n static parse(input) {\n if (input instanceof ColorArray) {\n return input;\n }\n // Backwards compatibility (e.g. hillshade-shadow-color): bare Color is treated the same as array with single value.\n if (typeof input === 'string') {\n const parsed_val = Color.parse(input);\n if (!parsed_val) {\n return undefined;\n }\n return new ColorArray([parsed_val]);\n }\n if (!Array.isArray(input)) {\n return undefined;\n }\n const colors = [];\n for (const val of input) {\n if (typeof val !== 'string') {\n return undefined;\n }\n const parsed_val = Color.parse(val);\n if (!parsed_val) {\n return undefined;\n }\n colors.push(parsed_val);\n }\n return new ColorArray(colors);\n }\n toString() {\n return JSON.stringify(this.values);\n }\n static interpolate(from, to, t, spaceKey = 'rgb') {\n const colors = [];\n if (from.values.length != to.values.length) {\n throw new Error(`colorArray: Arrays have mismatched length (${from.values.length} vs. ${to.values.length}), cannot interpolate.`);\n }\n for (let i = 0; i < from.values.length; i++) {\n colors.push(Color.interpolate(from.values[i], to.values[i], t, spaceKey));\n }\n return new ColorArray(colors);\n }\n}\n\nclass RuntimeError extends Error {\n constructor(message) {\n super(message);\n this.name = 'RuntimeError';\n }\n toJSON() {\n return this.message;\n }\n}\n\n/** Set of valid anchor positions, as a set for validation */\nconst anchors = new Set([\n 'center',\n 'left',\n 'right',\n 'top',\n 'bottom',\n 'top-left',\n 'top-right',\n 'bottom-left',\n 'bottom-right'\n]);\n/**\n * Utility class to assist managing values for text-variable-anchor-offset property. Create instances from\n * bare arrays using the static method `VariableAnchorOffsetCollection.parse`.\n * @private\n */\nclass VariableAnchorOffsetCollection {\n constructor(values) {\n this.values = values.slice();\n }\n static parse(input) {\n if (input instanceof VariableAnchorOffsetCollection) {\n return input;\n }\n if (!Array.isArray(input) || input.length < 1 || input.length % 2 !== 0) {\n return undefined;\n }\n for (let i = 0; i < input.length; i += 2) {\n // Elements in even positions should be anchor positions; Elements in odd positions should be offset values\n const anchorValue = input[i];\n const offsetValue = input[i + 1];\n if (typeof anchorValue !== 'string' || !anchors.has(anchorValue)) {\n return undefined;\n }\n if (!Array.isArray(offsetValue) ||\n offsetValue.length !== 2 ||\n typeof offsetValue[0] !== 'number' ||\n typeof offsetValue[1] !== 'number') {\n return undefined;\n }\n }\n return new VariableAnchorOffsetCollection(input);\n }\n toString() {\n return JSON.stringify(this.values);\n }\n static interpolate(from, to, t) {\n const fromValues = from.values;\n const toValues = to.values;\n if (fromValues.length !== toValues.length) {\n throw new RuntimeError(`Cannot interpolate values of different length. from: ${from.toString()}, to: ${to.toString()}`);\n }\n const output = [];\n for (let i = 0; i < fromValues.length; i += 2) {\n // Anchor entries must match\n if (fromValues[i] !== toValues[i]) {\n throw new RuntimeError(`Cannot interpolate values containing mismatched anchors. from[${i}]: ${fromValues[i]}, to[${i}]: ${toValues[i]}`);\n }\n output.push(fromValues[i]);\n // Interpolate the offset values for each anchor\n const [fx, fy] = fromValues[i + 1];\n const [tx, ty] = toValues[i + 1];\n output.push([interpolateNumber(fx, tx, t), interpolateNumber(fy, ty, t)]);\n }\n return new VariableAnchorOffsetCollection(output);\n }\n}\n\nclass ResolvedImage {\n constructor(options) {\n this.name = options.name;\n this.available = options.available;\n }\n toString() {\n return this.name;\n }\n static fromString(name) {\n if (!name)\n return null; // treat empty values as no image\n return new ResolvedImage({ name, available: false });\n }\n}\n\nclass ProjectionDefinition {\n constructor(from, to, transition) {\n this.from = from;\n this.to = to;\n this.transition = transition;\n }\n static interpolate(from, to, t) {\n return new ProjectionDefinition(from, to, t);\n }\n static parse(input) {\n if (input instanceof ProjectionDefinition) {\n return input;\n }\n if (Array.isArray(input) &&\n input.length === 3 &&\n typeof input[0] === 'string' &&\n typeof input[1] === 'string' &&\n typeof input[2] === 'number') {\n return new ProjectionDefinition(input[0], input[1], input[2]);\n }\n if (typeof input === 'object' &&\n typeof input.from === 'string' &&\n typeof input.to === 'string' &&\n typeof input.transition === 'number') {\n return new ProjectionDefinition(input.from, input.to, input.transition);\n }\n if (typeof input === 'string') {\n return new ProjectionDefinition(input, input, 1);\n }\n return undefined;\n }\n}\n\nfunction validateRGBA(r, g, b, a) {\n if (!(typeof r === 'number' &&\n r >= 0 &&\n r <= 255 &&\n typeof g === 'number' &&\n g >= 0 &&\n g <= 255 &&\n typeof b === 'number' &&\n b >= 0 &&\n b <= 255)) {\n const value = typeof a === 'number' ? [r, g, b, a] : [r, g, b];\n return `Invalid rgba value [${value.join(', ')}]: 'r', 'g', and 'b' must be between 0 and 255.`;\n }\n if (!(typeof a === 'undefined' || (typeof a === 'number' && a >= 0 && a <= 1))) {\n return `Invalid rgba value [${[r, g, b, a].join(', ')}]: 'a' must be between 0 and 1.`;\n }\n return null;\n}\nfunction isValue(mixed) {\n if (mixed === null ||\n typeof mixed === 'string' ||\n typeof mixed === 'boolean' ||\n typeof mixed === 'number' ||\n mixed instanceof ProjectionDefinition ||\n mixed instanceof Color ||\n mixed instanceof Collator ||\n mixed instanceof Formatted ||\n mixed instanceof Padding ||\n mixed instanceof NumberArray ||\n mixed instanceof ColorArray ||\n mixed instanceof VariableAnchorOffsetCollection ||\n mixed instanceof ResolvedImage) {\n return true;\n }\n else if (Array.isArray(mixed)) {\n for (const item of mixed) {\n if (!isValue(item)) {\n return false;\n }\n }\n return true;\n }\n else if (typeof mixed === 'object') {\n for (const key in mixed) {\n if (!isValue(mixed[key])) {\n return false;\n }\n }\n return true;\n }\n else {\n return false;\n }\n}\nfunction typeOf(value) {\n if (value === null) {\n return NullType;\n }\n else if (typeof value === 'string') {\n return StringType;\n }\n else if (typeof value === 'boolean') {\n return BooleanType;\n }\n else if (typeof value === 'number') {\n return NumberType;\n }\n else if (value instanceof Color) {\n return ColorType;\n }\n else if (value instanceof ProjectionDefinition) {\n return ProjectionDefinitionType;\n }\n else if (value instanceof Collator) {\n return CollatorType;\n }\n else if (value instanceof Formatted) {\n return FormattedType;\n }\n else if (value instanceof Padding) {\n return PaddingType;\n }\n else if (value instanceof NumberArray) {\n return NumberArrayType;\n }\n else if (value instanceof ColorArray) {\n return ColorArrayType;\n }\n else if (value instanceof VariableAnchorOffsetCollection) {\n return VariableAnchorOffsetCollectionType;\n }\n else if (value instanceof ResolvedImage) {\n return ResolvedImageType;\n }\n else if (Array.isArray(value)) {\n const length = value.length;\n let itemType;\n for (const item of value) {\n const t = typeOf(item);\n if (!itemType) {\n itemType = t;\n }\n else if (itemType === t) {\n continue;\n }\n else {\n itemType = ValueType;\n break;\n }\n }\n return array(itemType || ValueType, length);\n }\n else {\n return ObjectType;\n }\n}\nfunction valueToString(value) {\n const type = typeof value;\n if (value === null) {\n return '';\n }\n else if (type === 'string' || type === 'number' || type === 'boolean') {\n return String(value);\n }\n else if (value instanceof Color ||\n value instanceof ProjectionDefinition ||\n value instanceof Formatted ||\n value instanceof Padding ||\n value instanceof NumberArray ||\n value instanceof ColorArray ||\n value instanceof VariableAnchorOffsetCollection ||\n value instanceof ResolvedImage) {\n return value.toString();\n }\n else {\n return JSON.stringify(value);\n }\n}\n\nclass Literal {\n constructor(type, value) {\n this.type = type;\n this.value = value;\n }\n static parse(args, context) {\n if (args.length !== 2)\n return context.error(`'literal' expression requires exactly one argument, but found ${args.length - 1} instead.`);\n if (!isValue(args[1]))\n return context.error('invalid value');\n const value = args[1];\n let type = typeOf(value);\n // special case: infer the item type if possible for zero-length arrays\n const expected = context.expectedType;\n if (type.kind === 'array' &&\n type.N === 0 &&\n expected &&\n expected.kind === 'array' &&\n (typeof expected.N !== 'number' || expected.N === 0)) {\n type = expected;\n }\n return new Literal(type, value);\n }\n evaluate() {\n return this.value;\n }\n eachChild() { }\n outputDefined() {\n return true;\n }\n}\n\nconst types$1 = {\n string: StringType,\n number: NumberType,\n boolean: BooleanType,\n object: ObjectType\n};\nclass Assertion {\n constructor(type, args) {\n this.type = type;\n this.args = args;\n }\n static parse(args, context) {\n if (args.length < 2)\n return context.error('Expected at least one argument.');\n let i = 1;\n let type;\n const name = args[0];\n if (name === 'array') {\n let itemType;\n if (args.length > 2) {\n const type = args[1];\n if (typeof type !== 'string' || !(type in types$1) || type === 'object')\n return context.error('The item type argument of \"array\" must be one of string, number, boolean', 1);\n itemType = types$1[type];\n i++;\n }\n else {\n itemType = ValueType;\n }\n let N;\n if (args.length > 3) {\n if (args[2] !== null &&\n (typeof args[2] !== 'number' || args[2] < 0 || args[2] !== Math.floor(args[2]))) {\n return context.error('The length argument to \"array\" must be a positive integer literal', 2);\n }\n N = args[2];\n i++;\n }\n type = array(itemType, N);\n }\n else {\n if (!types$1[name])\n throw new Error(`Types doesn't contain name = ${name}`);\n type = types$1[name];\n }\n const parsed = [];\n for (; i < args.length; i++) {\n const input = context.parse(args[i], i, ValueType);\n if (!input)\n return null;\n parsed.push(input);\n }\n return new Assertion(type, parsed);\n }\n evaluate(ctx) {\n for (let i = 0; i < this.args.length; i++) {\n const value = this.args[i].evaluate(ctx);\n const error = checkSubtype(this.type, typeOf(value));\n if (!error) {\n return value;\n }\n else if (i === this.args.length - 1) {\n throw new RuntimeError(`Expected value to be of type ${typeToString(this.type)}, but found ${typeToString(typeOf(value))} instead.`);\n }\n }\n throw new Error();\n }\n eachChild(fn) {\n this.args.forEach(fn);\n }\n outputDefined() {\n return this.args.every((arg) => arg.outputDefined());\n }\n}\n\nconst types = {\n 'to-boolean': BooleanType,\n 'to-color': ColorType,\n 'to-number': NumberType,\n 'to-string': StringType\n};\n/**\n * Special form for error-coalescing coercion expressions \"to-number\",\n * \"to-color\". Since these coercions can fail at runtime, they accept multiple\n * arguments, only evaluating one at a time until one succeeds.\n *\n * @private\n */\nclass Coercion {\n constructor(type, args) {\n this.type = type;\n this.args = args;\n }\n static parse(args, context) {\n if (args.length < 2)\n return context.error('Expected at least one argument.');\n const name = args[0];\n if (!types[name])\n throw new Error(`Can't parse ${name} as it is not part of the known types`);\n if ((name === 'to-boolean' || name === 'to-string') && args.length !== 2)\n return context.error('Expected one argument.');\n const type = types[name];\n const parsed = [];\n for (let i = 1; i < args.length; i++) {\n const input = context.parse(args[i], i, ValueType);\n if (!input)\n return null;\n parsed.push(input);\n }\n return new Coercion(type, parsed);\n }\n evaluate(ctx) {\n switch (this.type.kind) {\n case 'boolean':\n return Boolean(this.args[0].evaluate(ctx));\n case 'color': {\n let input;\n let error;\n for (const arg of this.args) {\n input = arg.evaluate(ctx);\n error = null;\n if (input instanceof Color) {\n return input;\n }\n else if (typeof input === 'string') {\n const c = ctx.parseColor(input);\n if (c)\n return c;\n }\n else if (Array.isArray(input)) {\n if (input.length < 3 || input.length > 4) {\n error = `Invalid rgba value ${JSON.stringify(input)}: expected an array containing either three or four numeric values.`;\n }\n else {\n error = validateRGBA(input[0], input[1], input[2], input[3]);\n }\n if (!error) {\n return new Color(input[0] / 255, input[1] / 255, input[2] / 255, input[3]);\n }\n }\n }\n throw new RuntimeError(error ||\n `Could not parse color from value '${typeof input === 'string' ? input : JSON.stringify(input)}'`);\n }\n case 'padding': {\n let input;\n for (const arg of this.args) {\n input = arg.evaluate(ctx);\n const pad = Padding.parse(input);\n if (pad) {\n return pad;\n }\n }\n throw new RuntimeError(`Could not parse padding from value '${typeof input === 'string' ? input : JSON.stringify(input)}'`);\n }\n case 'numberArray': {\n let input;\n for (const arg of this.args) {\n input = arg.evaluate(ctx);\n const val = NumberArray.parse(input);\n if (val) {\n return val;\n }\n }\n throw new RuntimeError(`Could not parse numberArray from value '${typeof input === 'string' ? input : JSON.stringify(input)}'`);\n }\n case 'colorArray': {\n let input;\n for (const arg of this.args) {\n input = arg.evaluate(ctx);\n const val = ColorArray.parse(input);\n if (val) {\n return val;\n }\n }\n throw new RuntimeError(`Could not parse colorArray from value '${typeof input === 'string' ? input : JSON.stringify(input)}'`);\n }\n case 'variableAnchorOffsetCollection': {\n let input;\n for (const arg of this.args) {\n input = arg.evaluate(ctx);\n const coll = VariableAnchorOffsetCollection.parse(input);\n if (coll) {\n return coll;\n }\n }\n throw new RuntimeError(`Could not parse variableAnchorOffsetCollection from value '${typeof input === 'string' ? input : JSON.stringify(input)}'`);\n }\n case 'number': {\n let value = null;\n for (const arg of this.args) {\n value = arg.evaluate(ctx);\n if (value === null)\n return 0;\n const num = Number(value);\n if (isNaN(num))\n continue;\n return num;\n }\n throw new RuntimeError(`Could not convert ${JSON.stringify(value)} to number.`);\n }\n case 'formatted':\n // There is no explicit 'to-formatted' but this coercion can be implicitly\n // created by properties that expect the 'formatted' type.\n return Formatted.fromString(valueToString(this.args[0].evaluate(ctx)));\n case 'resolvedImage':\n return ResolvedImage.fromString(valueToString(this.args[0].evaluate(ctx)));\n case 'projectionDefinition':\n return this.args[0].evaluate(ctx);\n default:\n return valueToString(this.args[0].evaluate(ctx));\n }\n }\n eachChild(fn) {\n this.args.forEach(fn);\n }\n outputDefined() {\n return this.args.every((arg) => arg.outputDefined());\n }\n}\n\nconst geometryTypes = ['Unknown', 'Point', 'LineString', 'Polygon'];\nclass EvaluationContext {\n constructor() {\n this.globals = null;\n this.feature = null;\n this.featureState = null;\n this.formattedSection = null;\n this._parseColorCache = new Map();\n this.availableImages = null;\n this.canonical = null;\n }\n id() {\n return this.feature && 'id' in this.feature ? this.feature.id : null;\n }\n geometryType() {\n return this.feature\n ? typeof this.feature.type === 'number'\n ? geometryTypes[this.feature.type]\n : this.feature.type\n : null;\n }\n geometry() {\n return this.feature && 'geometry' in this.feature ? this.feature.geometry : null;\n }\n canonicalID() {\n return this.canonical;\n }\n properties() {\n return (this.feature && this.feature.properties) || {};\n }\n parseColor(input) {\n let cached = this._parseColorCache.get(input);\n if (!cached) {\n cached = Color.parse(input);\n this._parseColorCache.set(input, cached);\n }\n return cached;\n }\n}\n\n/**\n * State associated parsing at a given point in an expression tree.\n * @private\n */\nclass ParsingContext {\n constructor(registry, isConstantFunc, path = [], expectedType, scope = new Scope(), errors = []) {\n this.registry = registry;\n this.path = path;\n this.key = path.map((part) => `[${part}]`).join('');\n this.scope = scope;\n this.errors = errors;\n this.expectedType = expectedType;\n this._isConstant = isConstantFunc;\n }\n /**\n * @param expr the JSON expression to parse\n * @param index the optional argument index if this expression is an argument of a parent expression that's being parsed\n * @param options\n * @param options.omitTypeAnnotations set true to omit inferred type annotations. Caller beware: with this option set, the parsed expression's type will NOT satisfy `expectedType` if it would normally be wrapped in an inferred annotation.\n * @private\n */\n parse(expr, index, expectedType, bindings, options = {}) {\n if (index) {\n return this.concat(index, expectedType, bindings)._parse(expr, options);\n }\n return this._parse(expr, options);\n }\n _parse(expr, options) {\n if (expr === null ||\n typeof expr === 'string' ||\n typeof expr === 'boolean' ||\n typeof expr === 'number') {\n expr = ['literal', expr];\n }\n function annotate(parsed, type, typeAnnotation) {\n if (typeAnnotation === 'assert') {\n return new Assertion(type, [parsed]);\n }\n else if (typeAnnotation === 'coerce') {\n return new Coercion(type, [parsed]);\n }\n else {\n return parsed;\n }\n }\n if (Array.isArray(expr)) {\n if (expr.length === 0) {\n return this.error('Expected an array with at least one element. If you wanted a literal array, use [\"literal\", []].');\n }\n const op = expr[0];\n if (typeof op !== 'string') {\n this.error(`Expression name must be a string, but found ${typeof op} instead. If you wanted a literal array, use [\"literal\", [...]].`, 0);\n return null;\n }\n const Expr = this.registry[op];\n if (Expr) {\n let parsed = Expr.parse(expr, this);\n if (!parsed)\n return null;\n if (this.expectedType) {\n const expected = this.expectedType;\n const actual = parsed.type;\n // When we expect a number, string, boolean, or array but have a value, wrap it in an assertion.\n // When we expect a color or formatted string, but have a string or value, wrap it in a coercion.\n // Otherwise, we do static type-checking.\n //\n // These behaviors are overridable for:\n // * The \"coalesce\" operator, which needs to omit type annotations.\n // * String-valued properties (e.g. `text-field`), where coercion is more convenient than assertion.\n //\n if ((expected.kind === 'string' ||\n expected.kind === 'number' ||\n expected.kind === 'boolean' ||\n expected.kind === 'object' ||\n expected.kind === 'array') &&\n actual.kind === 'value') {\n parsed = annotate(parsed, expected, options.typeAnnotation || 'assert');\n }\n else if (('projectionDefinition' === expected.kind &&\n ['string', 'array'].includes(actual.kind)) ||\n (['color', 'formatted', 'resolvedImage'].includes(expected.kind) &&\n ['value', 'string'].includes(actual.kind)) ||\n (['padding', 'numberArray'].includes(expected.kind) &&\n ['value', 'number', 'array'].includes(actual.kind)) ||\n ('colorArray' === expected.kind &&\n ['value', 'string', 'array'].includes(actual.kind)) ||\n ('variableAnchorOffsetCollection' === expected.kind &&\n ['value', 'array'].includes(actual.kind))) {\n parsed = annotate(parsed, expected, options.typeAnnotation || 'coerce');\n }\n else if (this.checkSubtype(expected, actual)) {\n return null;\n }\n }\n // If an expression's arguments are all literals, we can evaluate\n // it immediately and replace it with a literal value in the\n // parsed/compiled result. Expressions that expect an image should\n // not be resolved here so we can later get the available images.\n if (!(parsed instanceof Literal) &&\n parsed.type.kind !== 'resolvedImage' &&\n this._isConstant(parsed)) {\n const ec = new EvaluationContext();\n try {\n parsed = new Literal(parsed.type, parsed.evaluate(ec));\n }\n catch (e) {\n this.error(e.message);\n return null;\n }\n }\n return parsed;\n }\n return this.error(`Unknown expression \"${op}\". If you wanted a literal array, use [\"literal\", [...]].`, 0);\n }\n else if (typeof expr === 'undefined') {\n return this.error(\"'undefined' value invalid. Use null instead.\");\n }\n else if (typeof expr === 'object') {\n return this.error('Bare objects invalid. Use [\"literal\", {...}] instead.');\n }\n else {\n return this.error(`Expected an array, but found ${typeof expr} instead.`);\n }\n }\n /**\n * Returns a copy of this context suitable for parsing the subexpression at\n * index `index`, optionally appending to 'let' binding map.\n *\n * Note that `errors` property, intended for collecting errors while\n * parsing, is copied by reference rather than cloned.\n * @private\n */\n concat(index, expectedType, bindings) {\n const path = typeof index === 'number' ? this.path.concat(index) : this.path;\n const scope = bindings ? this.scope.concat(bindings) : this.scope;\n return new ParsingContext(this.registry, this._isConstant, path, expectedType || null, scope, this.errors);\n }\n /**\n * Push a parsing (or type checking) error into the `this.errors`\n * @param error The message\n * @param keys Optionally specify the source of the error at a child\n * of the current expression at `this.key`.\n * @private\n */\n error(error, ...keys) {\n const key = `${this.key}${keys.map((k) => `[${k}]`).join('')}`;\n this.errors.push(new ExpressionParsingError(key, error));\n }\n /**\n * Returns null if `t` is a subtype of `expected`; otherwise returns an\n * error message and also pushes it to `this.errors`.\n * @param expected The expected type\n * @param t The actual type\n * @returns null if `t` is a subtype of `expected`; otherwise returns an error message\n */\n checkSubtype(expected, t) {\n const error = checkSubtype(expected, t);\n if (error)\n this.error(error);\n return error;\n }\n}\n\nclass Let {\n constructor(bindings, result) {\n this.type = result.type;\n this.bindings = [].concat(bindings);\n this.result = result;\n }\n evaluate(ctx) {\n return this.result.evaluate(ctx);\n }\n eachChild(fn) {\n for (const binding of this.bindings) {\n fn(binding[1]);\n }\n fn(this.result);\n }\n static parse(args, context) {\n if (args.length < 4)\n return context.error(`Expected at least 3 arguments, but found ${args.length - 1} instead.`);\n const bindings = [];\n for (let i = 1; i < args.length - 1; i += 2) {\n const name = args[i];\n if (typeof name !== 'string') {\n return context.error(`Expected string, but found ${typeof name} instead.`, i);\n }\n if (/[^a-zA-Z0-9_]/.test(name)) {\n return context.error(\"Variable names must contain only alphanumeric characters or '_'.\", i);\n }\n const value = context.parse(args[i + 1], i + 1);\n if (!value)\n return null;\n bindings.push([name, value]);\n }\n const result = context.parse(args[args.length - 1], args.length - 1, context.expectedType, bindings);\n if (!result)\n return null;\n return new Let(bindings, result);\n }\n outputDefined() {\n return this.result.outputDefined();\n }\n}\n\nclass Var {\n constructor(name, boundExpression) {\n this.type = boundExpression.type;\n this.name = name;\n this.boundExpression = boundExpression;\n }\n static parse(args, context) {\n if (args.length !== 2 || typeof args[1] !== 'string')\n return context.error(\"'var' expression requires exactly one string literal argument.\");\n const name = args[1];\n if (!context.scope.has(name)) {\n return context.error(`Unknown variable \"${name}\". Make sure \"${name}\" has been bound in an enclosing \"let\" expression before using it.`, 1);\n }\n return new Var(name, context.scope.get(name));\n }\n evaluate(ctx) {\n return this.boundExpression.evaluate(ctx);\n }\n eachChild() { }\n outputDefined() {\n return false;\n }\n}\n\nclass At {\n constructor(type, index, input) {\n this.type = type;\n this.index = index;\n this.input = input;\n }\n static parse(args, context) {\n if (args.length !== 3)\n return context.error(`Expected 2 arguments, but found ${args.length - 1} instead.`);\n const index = context.parse(args[1], 1, NumberType);\n const input = context.parse(args[2], 2, array(context.expectedType || ValueType));\n if (!index || !input)\n return null;\n const t = input.type;\n return new At(t.itemType, index, input);\n }\n evaluate(ctx) {\n const index = this.index.evaluate(ctx);\n const array = this.input.evaluate(ctx);\n if (index < 0) {\n throw new RuntimeError(`Array index out of bounds: ${index} < 0.`);\n }\n if (index >= array.length) {\n throw new RuntimeError(`Array index out of bounds: ${index} > ${array.length - 1}.`);\n }\n if (index !== Math.floor(index)) {\n throw new RuntimeError(`Array index must be an integer, but found ${index} instead.`);\n }\n return array[index];\n }\n eachChild(fn) {\n fn(this.index);\n fn(this.input);\n }\n outputDefined() {\n return false;\n }\n}\n\nclass In {\n constructor(needle, haystack) {\n this.type = BooleanType;\n this.needle = needle;\n this.haystack = haystack;\n }\n static parse(args, context) {\n if (args.length !== 3) {\n return context.error(`Expected 2 arguments, but found ${args.length - 1} instead.`);\n }\n const needle = context.parse(args[1], 1, ValueType);\n const haystack = context.parse(args[2], 2, ValueType);\n if (!needle || !haystack)\n return null;\n if (!isValidType(needle.type, [BooleanType, StringType, NumberType, NullType, ValueType])) {\n return context.error(`Expected first argument to be of type boolean, string, number or null, but found ${typeToString(needle.type)} instead`);\n }\n return new In(needle, haystack);\n }\n evaluate(ctx) {\n const needle = this.needle.evaluate(ctx);\n const haystack = this.haystack.evaluate(ctx);\n if (!haystack)\n return false;\n if (!isValidNativeType(needle, ['boolean', 'string', 'number', 'null'])) {\n throw new RuntimeError(`Expected first argument to be of type boolean, string, number or null, but found ${typeToString(typeOf(needle))} instead.`);\n }\n if (!isValidNativeType(haystack, ['string', 'array'])) {\n throw new RuntimeError(`Expected second argument to be of type array or string, but found ${typeToString(typeOf(haystack))} instead.`);\n }\n return haystack.indexOf(needle) >= 0;\n }\n eachChild(fn) {\n fn(this.needle);\n fn(this.haystack);\n }\n outputDefined() {\n return true;\n }\n}\n\nclass IndexOf {\n constructor(needle, haystack, fromIndex) {\n this.type = NumberType;\n this.needle = needle;\n this.haystack = haystack;\n this.fromIndex = fromIndex;\n }\n static parse(args, context) {\n if (args.length <= 2 || args.length >= 5) {\n return context.error(`Expected 2 or 3 arguments, but found ${args.length - 1} instead.`);\n }\n const needle = context.parse(args[1], 1, ValueType);\n const haystack = context.parse(args[2], 2, ValueType);\n if (!needle || !haystack)\n return null;\n if (!isValidType(needle.type, [BooleanType, StringType, NumberType, NullType, ValueType])) {\n return context.error(`Expected first argument to be of type boolean, string, number or null, but found ${typeToString(needle.type)} instead`);\n }\n if (args.length === 4) {\n const fromIndex = context.parse(args[3], 3, NumberType);\n if (!fromIndex)\n return null;\n return new IndexOf(needle, haystack, fromIndex);\n }\n else {\n return new IndexOf(needle, haystack);\n }\n }\n evaluate(ctx) {\n const needle = this.needle.evaluate(ctx);\n const haystack = this.haystack.evaluate(ctx);\n if (!isValidNativeType(needle, ['boolean', 'string', 'number', 'null'])) {\n throw new RuntimeError(`Expected first argument to be of type boolean, string, number or null, but found ${typeToString(typeOf(needle))} instead.`);\n }\n let fromIndex;\n if (this.fromIndex) {\n fromIndex = this.fromIndex.evaluate(ctx);\n }\n if (isValidNativeType(haystack, ['string'])) {\n const rawIndex = haystack.indexOf(needle, fromIndex);\n if (rawIndex === -1) {\n return -1;\n }\n else {\n // The index may be affected by surrogate pairs, so get the length of the preceding substring.\n return [...haystack.slice(0, rawIndex)].length;\n }\n }\n else if (isValidNativeType(haystack, ['array'])) {\n return haystack.indexOf(needle, fromIndex);\n }\n else {\n throw new RuntimeError(`Expected second argument to be of type array or string, but found ${typeToString(typeOf(haystack))} instead.`);\n }\n }\n eachChild(fn) {\n fn(this.needle);\n fn(this.haystack);\n if (this.fromIndex) {\n fn(this.fromIndex);\n }\n }\n outputDefined() {\n return false;\n }\n}\n\nclass Match {\n constructor(inputType, outputType, input, cases, outputs, otherwise) {\n this.inputType = inputType;\n this.type = outputType;\n this.input = input;\n this.cases = cases;\n this.outputs = outputs;\n this.otherwise = otherwise;\n }\n static parse(args, context) {\n if (args.length < 5)\n return context.error(`Expected at least 4 arguments, but found only ${args.length - 1}.`);\n if (args.length % 2 !== 1)\n return context.error('Expected an even number of arguments.');\n let inputType;\n let outputType;\n if (context.expectedType && context.expectedType.kind !== 'value') {\n outputType = context.expectedType;\n }\n const cases = {};\n const outputs = [];\n for (let i = 2; i < args.length - 1; i += 2) {\n let labels = args[i];\n const value = args[i + 1];\n if (!Array.isArray(labels)) {\n labels = [labels];\n }\n const labelContext = context.concat(i);\n if (labels.length === 0) {\n return labelContext.error('Expected at least one branch label.');\n }\n for (const label of labels) {\n if (typeof label !== 'number' && typeof label !== 'string') {\n return labelContext.error('Branch labels must be numbers or strings.');\n }\n else if (typeof label === 'number' && Math.abs(label) > Number.MAX_SAFE_INTEGER) {\n return labelContext.error(`Branch labels must be integers no larger than ${Number.MAX_SAFE_INTEGER}.`);\n }\n else if (typeof label === 'number' && Math.floor(label) !== label) {\n return labelContext.error('Numeric branch labels must be integer values.');\n }\n else if (!inputType) {\n inputType = typeOf(label);\n }\n else if (labelContext.checkSubtype(inputType, typeOf(label))) {\n return null;\n }\n if (typeof cases[String(label)] !== 'undefined') {\n return labelContext.error('Branch labels must be unique.');\n }\n cases[String(label)] = outputs.length;\n }\n const result = context.parse(value, i, outputType);\n if (!result)\n return null;\n outputType = outputType || result.type;\n outputs.push(result);\n }\n const input = context.parse(args[1], 1, ValueType);\n if (!input)\n return null;\n const otherwise = context.parse(args[args.length - 1], args.length - 1, outputType);\n if (!otherwise)\n return null;\n if (input.type.kind !== 'value' &&\n context.concat(1).checkSubtype(inputType, input.type)) {\n return null;\n }\n return new Match(inputType, outputType, input, cases, outputs, otherwise);\n }\n evaluate(ctx) {\n const input = this.input.evaluate(ctx);\n const output = (typeOf(input) === this.inputType && this.outputs[this.cases[input]]) || this.otherwise;\n return output.evaluate(ctx);\n }\n eachChild(fn) {\n fn(this.input);\n this.outputs.forEach(fn);\n fn(this.otherwise);\n }\n outputDefined() {\n return this.outputs.every((out) => out.outputDefined()) && this.otherwise.outputDefined();\n }\n}\n\nclass Case {\n constructor(type, branches, otherwise) {\n this.type = type;\n this.branches = branches;\n this.otherwise = otherwise;\n }\n static parse(args, context) {\n if (args.length < 4)\n return context.error(`Expected at least 3 arguments, but found only ${args.length - 1}.`);\n if (args.length % 2 !== 0)\n return context.error('Expected an odd number of arguments.');\n let outputType;\n if (context.expectedType && context.expectedType.kind !== 'value') {\n outputType = context.expectedType;\n }\n const branches = [];\n for (let i = 1; i < args.length - 1; i += 2) {\n const test = context.parse(args[i], i, BooleanType);\n if (!test)\n return null;\n const result = context.parse(args[i + 1], i + 1, outputType);\n if (!result)\n return null;\n branches.push([test, result]);\n outputType = outputType || result.type;\n }\n const otherwise = context.parse(args[args.length - 1], args.length - 1, outputType);\n if (!otherwise)\n return null;\n if (!outputType)\n throw new Error(\"Can't infer output type\");\n return new Case(outputType, branches, otherwise);\n }\n evaluate(ctx) {\n for (const [test, expression] of this.branches) {\n if (test.evaluate(ctx)) {\n return expression.evaluate(ctx);\n }\n }\n return this.otherwise.evaluate(ctx);\n }\n eachChild(fn) {\n for (const [test, expression] of this.branches) {\n fn(test);\n fn(expression);\n }\n fn(this.otherwise);\n }\n outputDefined() {\n return (this.branches.every(([_, out]) => out.outputDefined()) && this.otherwise.outputDefined());\n }\n}\n\nclass Slice {\n constructor(type, input, beginIndex, endIndex) {\n this.type = type;\n this.input = input;\n this.beginIndex = beginIndex;\n this.endIndex = endIndex;\n }\n static parse(args, context) {\n if (args.length <= 2 || args.length >= 5) {\n return context.error(`Expected 2 or 3 arguments, but found ${args.length - 1} instead.`);\n }\n const input = context.parse(args[1], 1, ValueType);\n const beginIndex = context.parse(args[2], 2, NumberType);\n if (!input || !beginIndex)\n return null;\n if (!isValidType(input.type, [array(ValueType), StringType, ValueType])) {\n return context.error(`Expected first argument to be of type array or string, but found ${typeToString(input.type)} instead`);\n }\n if (args.length === 4) {\n const endIndex = context.parse(args[3], 3, NumberType);\n if (!endIndex)\n return null;\n return new Slice(input.type, input, beginIndex, endIndex);\n }\n else {\n return new Slice(input.type, input, beginIndex);\n }\n }\n evaluate(ctx) {\n const input = this.input.evaluate(ctx);\n const beginIndex = this.beginIndex.evaluate(ctx);\n let endIndex;\n if (this.endIndex) {\n endIndex = this.endIndex.evaluate(ctx);\n }\n if (isValidNativeType(input, ['string'])) {\n // Indices may be affected by surrogate pairs.\n return [...input].slice(beginIndex, endIndex).join('');\n }\n else if (isValidNativeType(input, ['array'])) {\n return input.slice(beginIndex, endIndex);\n }\n else {\n throw new RuntimeError(`Expected first argument to be of type array or string, but found ${typeToString(typeOf(input))} instead.`);\n }\n }\n eachChild(fn) {\n fn(this.input);\n fn(this.beginIndex);\n if (this.endIndex) {\n fn(this.endIndex);\n }\n }\n outputDefined() {\n return false;\n }\n}\n\n/**\n * Returns the index of the last stop <= input, or 0 if it doesn't exist.\n * @private\n */\nfunction findStopLessThanOrEqualTo(stops, input) {\n const lastIndex = stops.length - 1;\n let lowerIndex = 0;\n let upperIndex = lastIndex;\n let currentIndex = 0;\n let currentValue, nextValue;\n while (lowerIndex <= upperIndex) {\n currentIndex = Math.floor((lowerIndex + upperIndex) / 2);\n currentValue = stops[currentIndex];\n nextValue = stops[currentIndex + 1];\n if (currentValue <= input) {\n if (currentIndex === lastIndex || input < nextValue) {\n // Search complete\n return currentIndex;\n }\n lowerIndex = currentIndex + 1;\n }\n else if (currentValue > input) {\n upperIndex = currentIndex - 1;\n }\n else {\n throw new RuntimeError('Input is not a number.');\n }\n }\n return 0;\n}\n\nclass Step {\n constructor(type, input, stops) {\n this.type = type;\n this.input = input;\n this.labels = [];\n this.outputs = [];\n for (const [label, expression] of stops) {\n this.labels.push(label);\n this.outputs.push(expression);\n }\n }\n static parse(args, context) {\n if (args.length - 1 < 4) {\n return context.error(`Expected at least 4 arguments, but found only ${args.length - 1}.`);\n }\n if ((args.length - 1) % 2 !== 0) {\n return context.error('Expected an even number of arguments.');\n }\n const input = context.parse(args[1], 1, NumberType);\n if (!input)\n return null;\n const stops = [];\n let outputType = null;\n if (context.expectedType && context.expectedType.kind !== 'value') {\n outputType = context.expectedType;\n }\n for (let i = 1; i < args.length; i += 2) {\n const label = i === 1 ? -Infinity : args[i];\n const value = args[i + 1];\n const labelKey = i;\n const valueKey = i + 1;\n if (typeof label !== 'number') {\n return context.error('Input/output pairs for \"step\" expressions must be defined using literal numeric values (not computed expressions) for the input values.', labelKey);\n }\n if (stops.length && stops[stops.length - 1][0] >= label) {\n return context.error('Input/output pairs for \"step\" expressions must be arranged with input values in strictly ascending order.', labelKey);\n }\n const parsed = context.parse(value, valueKey, outputType);\n if (!parsed)\n return null;\n outputType = outputType || parsed.type;\n stops.push([label, parsed]);\n }\n return new Step(outputType, input, stops);\n }\n evaluate(ctx) {\n const labels = this.labels;\n const outputs = this.outputs;\n if (labels.length === 1) {\n return outputs[0].evaluate(ctx);\n }\n const value = this.input.evaluate(ctx);\n if (value <= labels[0]) {\n return outputs[0].evaluate(ctx);\n }\n const stopCount = labels.length;\n if (value >= labels[stopCount - 1]) {\n return outputs[stopCount - 1].evaluate(ctx);\n }\n const index = findStopLessThanOrEqualTo(labels, value);\n return outputs[index].evaluate(ctx);\n }\n eachChild(fn) {\n fn(this.input);\n for (const expression of this.outputs) {\n fn(expression);\n }\n }\n outputDefined() {\n return this.outputs.every((out) => out.outputDefined());\n }\n}\n\nfunction getDefaultExportFromCjs (x) {\n\treturn x && x.__esModule && Object.prototype.hasOwnProperty.call(x, 'default') ? x['default'] : x;\n}\n\nvar unitbezier;\nvar hasRequiredUnitbezier;\n\nfunction requireUnitbezier () {\n\tif (hasRequiredUnitbezier) return unitbezier;\n\thasRequiredUnitbezier = 1;\n\n\tunitbezier = UnitBezier;\n\n\tfunction UnitBezier(p1x, p1y, p2x, p2y) {\n\t // Calculate the polynomial coefficients, implicit first and last control points are (0,0) and (1,1).\n\t this.cx = 3.0 * p1x;\n\t this.bx = 3.0 * (p2x - p1x) - this.cx;\n\t this.ax = 1.0 - this.cx - this.bx;\n\n\t this.cy = 3.0 * p1y;\n\t this.by = 3.0 * (p2y - p1y) - this.cy;\n\t this.ay = 1.0 - this.cy - this.by;\n\n\t this.p1x = p1x;\n\t this.p1y = p1y;\n\t this.p2x = p2x;\n\t this.p2y = p2y;\n\t}\n\n\tUnitBezier.prototype = {\n\t sampleCurveX: function (t) {\n\t // `ax t^3 + bx t^2 + cx t' expanded using Horner's rule.\n\t return ((this.ax * t + this.bx) * t + this.cx) * t;\n\t },\n\n\t sampleCurveY: function (t) {\n\t return ((this.ay * t + this.by) * t + this.cy) * t;\n\t },\n\n\t sampleCurveDerivativeX: function (t) {\n\t return (3.0 * this.ax * t + 2.0 * this.bx) * t + this.cx;\n\t },\n\n\t solveCurveX: function (x, epsilon) {\n\t if (epsilon === undefined) epsilon = 1e-6;\n\n\t if (x < 0.0) return 0.0;\n\t if (x > 1.0) return 1.0;\n\n\t var t = x;\n\n\t // First try a few iterations of Newton's method - normally very fast.\n\t for (var i = 0; i < 8; i++) {\n\t var x2 = this.sampleCurveX(t) - x;\n\t if (Math.abs(x2) < epsilon) return t;\n\n\t var d2 = this.sampleCurveDerivativeX(t);\n\t if (Math.abs(d2) < 1e-6) break;\n\n\t t = t - x2 / d2;\n\t }\n\n\t // Fall back to the bisection method for reliability.\n\t var t0 = 0.0;\n\t var t1 = 1.0;\n\t t = x;\n\n\t for (i = 0; i < 20; i++) {\n\t x2 = this.sampleCurveX(t);\n\t if (Math.abs(x2 - x) < epsilon) break;\n\n\t if (x > x2) {\n\t t0 = t;\n\t } else {\n\t t1 = t;\n\t }\n\n\t t = (t1 - t0) * 0.5 + t0;\n\t }\n\n\t return t;\n\t },\n\n\t solve: function (x, epsilon) {\n\t return this.sampleCurveY(this.solveCurveX(x, epsilon));\n\t }\n\t};\n\treturn unitbezier;\n}\n\nvar unitbezierExports = requireUnitbezier();\nvar UnitBezier = /*@__PURE__*/getDefaultExportFromCjs(unitbezierExports);\n\nclass Interpolate {\n constructor(type, operator, interpolation, input, stops) {\n this.type = type;\n this.operator = operator;\n this.interpolation = interpolation;\n this.input = input;\n this.labels = [];\n this.outputs = [];\n for (const [label, expression] of stops) {\n this.labels.push(label);\n this.outputs.push(expression);\n }\n }\n static interpolationFactor(interpolation, input, lower, upper) {\n let t = 0;\n if (interpolation.name === 'exponential') {\n t = exponentialInterpolation(input, interpolation.base, lower, upper);\n }\n else if (interpolation.name === 'linear') {\n t = exponentialInterpolation(input, 1, lower, upper);\n }\n else if (interpolation.name === 'cubic-bezier') {\n const c = interpolation.controlPoints;\n const ub = new UnitBezier(c[0], c[1], c[2], c[3]);\n t = ub.solve(exponentialInterpolation(input, 1, lower, upper));\n }\n return t;\n }\n static parse(args, context) {\n let [operator, interpolation, input, ...rest] = args;\n if (!Array.isArray(interpolation) || interpolation.length === 0) {\n return context.error('Expected an interpolation type expression.', 1);\n }\n if (interpolation[0] === 'linear') {\n interpolation = { name: 'linear' };\n }\n else if (interpolation[0] === 'exponential') {\n const base = interpolation[1];\n if (typeof base !== 'number')\n return context.error('Exponential interpolation requires a numeric base.', 1, 1);\n interpolation = {\n name: 'exponential',\n base\n };\n }\n else if (interpolation[0] === 'cubic-bezier') {\n const controlPoints = interpolation.slice(1);\n if (controlPoints.length !== 4 ||\n controlPoints.some((t) => typeof t !== 'number' || t < 0 || t > 1)) {\n return context.error('Cubic bezier interpolation requires four numeric arguments with values between 0 and 1.', 1);\n }\n interpolation = {\n name: 'cubic-bezier',\n controlPoints: controlPoints\n };\n }\n else {\n return context.error(`Unknown interpolation type ${String(interpolation[0])}`, 1, 0);\n }\n if (args.length - 1 < 4) {\n return context.error(`Expected at least 4 arguments, but found only ${args.length - 1}.`);\n }\n if ((args.length - 1) % 2 !== 0) {\n return context.error('Expected an even number of arguments.');\n }\n input = context.parse(input, 2, NumberType);\n if (!input)\n return null;\n const stops = [];\n let outputType = null;\n if ((operator === 'interpolate-hcl' || operator === 'interpolate-lab') &&\n context.expectedType != ColorArrayType) {\n outputType = ColorType;\n }\n else if (context.expectedType && context.expectedType.kind !== 'value') {\n outputType = context.expectedType;\n }\n for (let i = 0; i < rest.length; i += 2) {\n const label = rest[i];\n const value = rest[i + 1];\n const labelKey = i + 3;\n const valueKey = i + 4;\n if (typeof label !== 'number') {\n return context.error('Input/output pairs for \"interpolate\" expressions must be defined using literal numeric values (not computed expressions) for the input values.', labelKey);\n }\n if (stops.length && stops[stops.length - 1][0] >= label) {\n return context.error('Input/output pairs for \"interpolate\" expressions must be arranged with input values in strictly ascending order.', labelKey);\n }\n const parsed = context.parse(value, valueKey, outputType);\n if (!parsed)\n return null;\n outputType = outputType || parsed.type;\n stops.push([label, parsed]);\n }\n if (!verifyType(outputType, NumberType) &&\n !verifyType(outputType, ProjectionDefinitionType) &&\n !verifyType(outputType, ColorType) &&\n !verifyType(outputType, PaddingType) &&\n !verifyType(outputType, NumberArrayType) &&\n !verifyType(outputType, ColorArrayType) &&\n !verifyType(outputType, VariableAnchorOffsetCollectionType) &&\n !verifyType(outputType, array(NumberType))) {\n return context.error(`Type ${typeToString(outputType)} is not interpolatable.`);\n }\n return new Interpolate(outputType, operator, interpolation, input, stops);\n }\n evaluate(ctx) {\n const labels = this.labels;\n const outputs = this.outputs;\n if (labels.length === 1) {\n return outputs[0].evaluate(ctx);\n }\n const value = this.input.evaluate(ctx);\n if (value <= labels[0]) {\n return outputs[0].evaluate(ctx);\n }\n const stopCount = labels.length;\n if (value >= labels[stopCount - 1]) {\n return outputs[stopCount - 1].evaluate(ctx);\n }\n const index = findStopLessThanOrEqualTo(labels, value);\n const lower = labels[index];\n const upper = labels[index + 1];\n const t = Interpolate.interpolationFactor(this.interpolation, value, lower, upper);\n const outputLower = outputs[index].evaluate(ctx);\n const outputUpper = outputs[index + 1].evaluate(ctx);\n switch (this.operator) {\n case 'interpolate':\n switch (this.type.kind) {\n case 'number':\n return interpolateNumber(outputLower, outputUpper, t);\n case 'color':\n return Color.interpolate(outputLower, outputUpper, t);\n case 'padding':\n return Padding.interpolate(outputLower, outputUpper, t);\n case 'colorArray':\n return ColorArray.interpolate(outputLower, outputUpper, t);\n case 'numberArray':\n return NumberArray.interpolate(outputLower, outputUpper, t);\n case 'variableAnchorOffsetCollection':\n return VariableAnchorOffsetCollection.interpolate(outputLower, outputUpper, t);\n case 'array':\n return interpolateArray(outputLower, outputUpper, t);\n case 'projectionDefinition':\n return ProjectionDefinition.interpolate(outputLower, outputUpper, t);\n }\n case 'interpolate-hcl':\n switch (this.type.kind) {\n case 'color':\n return Color.interpolate(outputLower, outputUpper, t, 'hcl');\n case 'colorArray':\n return ColorArray.interpolate(outputLower, outputUpper, t, 'hcl');\n }\n case 'interpolate-lab':\n switch (this.type.kind) {\n case 'color':\n return Color.interpolate(outputLower, outputUpper, t, 'lab');\n case 'colorArray':\n return ColorArray.interpolate(outputLower, outputUpper, t, 'lab');\n }\n }\n }\n eachChild(fn) {\n fn(this.input);\n for (const expression of this.outputs) {\n fn(expression);\n }\n }\n outputDefined() {\n return this.outputs.every((out) => out.outputDefined());\n }\n}\n/**\n * Returns a ratio that can be used to interpolate between exponential function\n * stops.\n * How it works: Two consecutive stop values define a (scaled and shifted) exponential function `f(x) = a * base^x + b`, where `base` is the user-specified base,\n * and `a` and `b` are constants affording sufficient degrees of freedom to fit\n * the function to the given stops.\n *\n * Here's a bit of algebra that lets us compute `f(x)` directly from the stop\n * values without explicitly solving for `a` and `b`:\n *\n * First stop value: `f(x0) = y0 = a * base^x0 + b`\n * Second stop value: `f(x1) = y1 = a * base^x1 + b`\n * => `y1 - y0 = a(base^x1 - base^x0)`\n * => `a = (y1 - y0)/(base^x1 - base^x0)`\n *\n * Desired value: `f(x) = y = a * base^x + b`\n * => `f(x) = y0 + a * (base^x - base^x0)`\n *\n * From the above, we can replace the `a` in `a * (base^x - base^x0)` and do a\n * little algebra:\n * ```\n * a * (base^x - base^x0) = (y1 - y0)/(base^x1 - base^x0) * (base^x - base^x0)\n * = (y1 - y0) * (base^x - base^x0) / (base^x1 - base^x0)\n * ```\n *\n * If we let `(base^x - base^x0) / (base^x1 base^x0)`, then we have\n * `f(x) = y0 + (y1 - y0) * ratio`. In other words, `ratio` may be treated as\n * an interpolation factor between the two stops' output values.\n *\n * (Note: a slightly different form for `ratio`,\n * `(base^(x-x0) - 1) / (base^(x1-x0) - 1) `, is equivalent, but requires fewer\n * expensive `Math.pow()` operations.)\n *\n * @private\n */\nfunction exponentialInterpolation(input, base, lowerValue, upperValue) {\n const difference = upperValue - lowerValue;\n const progress = input - lowerValue;\n if (difference === 0) {\n return 0;\n }\n else if (base === 1) {\n return progress / difference;\n }\n else {\n return (Math.pow(base, progress) - 1) / (Math.pow(base, difference) - 1);\n }\n}\nconst interpolateFactory = {\n color: Color.interpolate,\n number: interpolateNumber,\n padding: Padding.interpolate,\n numberArray: NumberArray.interpolate,\n colorArray: ColorArray.interpolate,\n variableAnchorOffsetCollection: VariableAnchorOffsetCollection.interpolate,\n array: interpolateArray\n};\n\nclass Coalesce {\n constructor(type, args) {\n this.type = type;\n this.args = args;\n }\n static parse(args, context) {\n if (args.length < 2) {\n return context.error('Expected at least one argument.');\n }\n let outputType = null;\n const expectedType = context.expectedType;\n if (expectedType && expectedType.kind !== 'value') {\n outputType = expectedType;\n }\n const parsedArgs = [];\n for (const arg of args.slice(1)) {\n const parsed = context.parse(arg, 1 + parsedArgs.length, outputType, undefined, {\n typeAnnotation: 'omit'\n });\n if (!parsed)\n return null;\n outputType = outputType || parsed.type;\n parsedArgs.push(parsed);\n }\n if (!outputType)\n throw new Error('No output type');\n // Above, we parse arguments without inferred type annotation so that\n // they don't produce a runtime error for `null` input, which would\n // preempt the desired null-coalescing behavior.\n // Thus, if any of our arguments would have needed an annotation, we\n // need to wrap the enclosing coalesce expression with it instead.\n const needsAnnotation = expectedType && parsedArgs.some((arg) => checkSubtype(expectedType, arg.type));\n return needsAnnotation\n ? new Coalesce(ValueType, parsedArgs)\n : new Coalesce(outputType, parsedArgs);\n }\n evaluate(ctx) {\n let result = null;\n let argCount = 0;\n let requestedImageName;\n for (const arg of this.args) {\n argCount++;\n result = arg.evaluate(ctx);\n // we need to keep track of the first requested image in a coalesce statement\n // if coalesce can't find a valid image, we return the first image name so styleimagemissing can fire\n if (result && result instanceof ResolvedImage && !result.available) {\n if (!requestedImageName) {\n requestedImageName = result.name;\n }\n result = null;\n if (argCount === this.args.length) {\n result = requestedImageName;\n }\n }\n if (result !== null)\n break;\n }\n return result;\n }\n eachChild(fn) {\n this.args.forEach(fn);\n }\n outputDefined() {\n return this.args.every((arg) => arg.outputDefined());\n }\n}\n\nfunction isComparableType(op, type) {\n if (op === '==' || op === '!=') {\n // equality operator\n return (type.kind === 'boolean' ||\n type.kind === 'string' ||\n type.kind === 'number' ||\n type.kind === 'null' ||\n type.kind === 'value');\n }\n else {\n // ordering operator\n return type.kind === 'string' || type.kind === 'number' || type.kind === 'value';\n }\n}\nfunction eq(ctx, a, b) {\n return a === b;\n}\nfunction neq(ctx, a, b) {\n return a !== b;\n}\nfunction lt(ctx, a, b) {\n return a < b;\n}\nfunction gt(ctx, a, b) {\n return a > b;\n}\nfunction lteq(ctx, a, b) {\n return a <= b;\n}\nfunction gteq(ctx, a, b) {\n return a >= b;\n}\nfunction eqCollate(ctx, a, b, c) {\n return c.compare(a, b) === 0;\n}\nfunction neqCollate(ctx, a, b, c) {\n return !eqCollate(ctx, a, b, c);\n}\nfunction ltCollate(ctx, a, b, c) {\n return c.compare(a, b) < 0;\n}\nfunction gtCollate(ctx, a, b, c) {\n return c.compare(a, b) > 0;\n}\nfunction lteqCollate(ctx, a, b, c) {\n return c.compare(a, b) <= 0;\n}\nfunction gteqCollate(ctx, a, b, c) {\n return c.compare(a, b) >= 0;\n}\n/**\n * Special form for comparison operators, implementing the signatures:\n * - (T, T, ?Collator) => boolean\n * - (T, value, ?Collator) => boolean\n * - (value, T, ?Collator) => boolean\n *\n * For inequalities, T must be either value, string, or number. For ==/!=, it\n * can also be boolean or null.\n *\n * Equality semantics are equivalent to Javascript's strict equality (===/!==)\n * -- i.e., when the arguments' types don't match, == evaluates to false, != to\n * true.\n *\n * When types don't match in an ordering comparison, a runtime error is thrown.\n *\n * @private\n */\nfunction makeComparison(op, compareBasic, compareWithCollator) {\n const isOrderComparison = op !== '==' && op !== '!=';\n return class Comparison {\n constructor(lhs, rhs, collator) {\n this.type = BooleanType;\n this.lhs = lhs;\n this.rhs = rhs;\n this.collator = collator;\n this.hasUntypedArgument = lhs.type.kind === 'value' || rhs.type.kind === 'value';\n }\n static parse(args, context) {\n if (args.length !== 3 && args.length !== 4)\n return context.error('Expected two or three arguments.');\n const op = args[0];\n let lhs = context.parse(args[1], 1, ValueType);\n if (!lhs)\n return null;\n if (!isComparableType(op, lhs.type)) {\n return context\n .concat(1)\n .error(`\"${op}\" comparisons are not supported for type '${typeToString(lhs.type)}'.`);\n }\n let rhs = context.parse(args[2], 2, ValueType);\n if (!rhs)\n return null;\n if (!isComparableType(op, rhs.type)) {\n return context\n .concat(2)\n .error(`\"${op}\" comparisons are not supported for type '${typeToString(rhs.type)}'.`);\n }\n if (lhs.type.kind !== rhs.type.kind &&\n lhs.type.kind !== 'value' &&\n rhs.type.kind !== 'value') {\n return context.error(`Cannot compare types '${typeToString(lhs.type)}' and '${typeToString(rhs.type)}'.`);\n }\n if (isOrderComparison) {\n // typing rules specific to less/greater than operators\n if (lhs.type.kind === 'value' && rhs.type.kind !== 'value') {\n // (value, T)\n lhs = new Assertion(rhs.type, [lhs]);\n }\n else if (lhs.type.kind !== 'value' && rhs.type.kind === 'value') {\n // (T, value)\n rhs = new Assertion(lhs.type, [rhs]);\n }\n }\n let collator = null;\n if (args.length === 4) {\n if (lhs.type.kind !== 'string' &&\n rhs.type.kind !== 'string' &&\n lhs.type.kind !== 'value' &&\n rhs.type.kind !== 'value') {\n return context.error('Cannot use collator to compare non-string types.');\n }\n collator = context.parse(args[3], 3, CollatorType);\n if (!collator)\n return null;\n }\n return new Comparison(lhs, rhs, collator);\n }\n evaluate(ctx) {\n const lhs = this.lhs.evaluate(ctx);\n const rhs = this.rhs.evaluate(ctx);\n if (isOrderComparison && this.hasUntypedArgument) {\n const lt = typeOf(lhs);\n const rt = typeOf(rhs);\n // check that type is string or number, and equal\n if (lt.kind !== rt.kind || !(lt.kind === 'string' || lt.kind === 'number')) {\n throw new RuntimeError(`Expected arguments for \"${op}\" to be (string, string) or (number, number), but found (${lt.kind}, ${rt.kind}) instead.`);\n }\n }\n if (this.collator && !isOrderComparison && this.hasUntypedArgument) {\n const lt = typeOf(lhs);\n const rt = typeOf(rhs);\n if (lt.kind !== 'string' || rt.kind !== 'string') {\n return compareBasic(ctx, lhs, rhs);\n }\n }\n return this.collator\n ? compareWithCollator(ctx, lhs, rhs, this.collator.evaluate(ctx))\n : compareBasic(ctx, lhs, rhs);\n }\n eachChild(fn) {\n fn(this.lhs);\n fn(this.rhs);\n if (this.collator) {\n fn(this.collator);\n }\n }\n outputDefined() {\n return true;\n }\n };\n}\nconst Equals = makeComparison('==', eq, eqCollate);\nconst NotEquals = makeComparison('!=', neq, neqCollate);\nconst LessThan = makeComparison('<', lt, ltCollate);\nconst GreaterThan = makeComparison('>', gt, gtCollate);\nconst LessThanOrEqual = makeComparison('<=', lteq, lteqCollate);\nconst GreaterThanOrEqual = makeComparison('>=', gteq, gteqCollate);\n\nclass CollatorExpression {\n constructor(caseSensitive, diacriticSensitive, locale) {\n this.type = CollatorType;\n this.locale = locale;\n this.caseSensitive = caseSensitive;\n this.diacriticSensitive = diacriticSensitive;\n }\n static parse(args, context) {\n if (args.length !== 2)\n return context.error('Expected one argument.');\n const options = args[1];\n if (typeof options !== 'object' || Array.isArray(options))\n return context.error('Collator options argument must be an object.');\n const caseSensitive = context.parse(options['case-sensitive'] === undefined ? false : options['case-sensitive'], 1, BooleanType);\n if (!caseSensitive)\n return null;\n const diacriticSensitive = context.parse(options['diacritic-sensitive'] === undefined ? false : options['diacritic-sensitive'], 1, BooleanType);\n if (!diacriticSensitive)\n return null;\n let locale = null;\n if (options['locale']) {\n locale = context.parse(options['locale'], 1, StringType);\n if (!locale)\n return null;\n }\n return new CollatorExpression(caseSensitive, diacriticSensitive, locale);\n }\n evaluate(ctx) {\n return new Collator(this.caseSensitive.evaluate(ctx), this.diacriticSensitive.evaluate(ctx), this.locale ? this.locale.evaluate(ctx) : null);\n }\n eachChild(fn) {\n fn(this.caseSensitive);\n fn(this.diacriticSensitive);\n if (this.locale) {\n fn(this.locale);\n }\n }\n outputDefined() {\n // Technically the set of possible outputs is the combinatoric set of Collators produced\n // by all possible outputs of locale/caseSensitive/diacriticSensitive\n // But for the primary use of Collators in comparison operators, we ignore the Collator's\n // possible outputs anyway, so we can get away with leaving this false for now.\n return false;\n }\n}\n\nclass NumberFormat {\n constructor(number, locale, currency, unit, minFractionDigits, maxFractionDigits) {\n this.type = StringType;\n this.number = number;\n this.locale = locale;\n this.currency = currency;\n this.unit = unit;\n this.minFractionDigits = minFractionDigits;\n this.maxFractionDigits = maxFractionDigits;\n }\n static parse(args, context) {\n if (args.length !== 3)\n return context.error('Expected two arguments.');\n const number = context.parse(args[1], 1, NumberType);\n if (!number)\n return null;\n const options = args[2];\n if (typeof options !== 'object' || Array.isArray(options))\n return context.error('NumberFormat options argument must be an object.');\n let locale = null;\n if (options['locale']) {\n locale = context.parse(options['locale'], 1, StringType);\n if (!locale)\n return null;\n }\n let currency = null;\n if (options['currency']) {\n currency = context.parse(options['currency'], 1, StringType);\n if (!currency)\n return null;\n }\n let unit = null;\n if (options['unit']) {\n unit = context.parse(options['unit'], 1, StringType);\n if (!unit)\n return null;\n }\n if (currency && unit) {\n return context.error('NumberFormat options `currency` and `unit` are mutually exclusive');\n }\n let minFractionDigits = null;\n if (options['min-fraction-digits']) {\n minFractionDigits = context.parse(options['min-fraction-digits'], 1, NumberType);\n if (!minFractionDigits)\n return null;\n }\n let maxFractionDigits = null;\n if (options['max-fraction-digits']) {\n maxFractionDigits = context.parse(options['max-fraction-digits'], 1, NumberType);\n if (!maxFractionDigits)\n return null;\n }\n return new NumberFormat(number, locale, currency, unit, minFractionDigits, maxFractionDigits);\n }\n evaluate(ctx) {\n return new Intl.NumberFormat(this.locale ? this.locale.evaluate(ctx) : [], {\n style: this.currency ? 'currency' : this.unit ? 'unit' : 'decimal',\n currency: this.currency ? this.currency.evaluate(ctx) : undefined,\n unit: this.unit ? this.unit.evaluate(ctx) : undefined,\n minimumFractionDigits: this.minFractionDigits\n ? this.minFractionDigits.evaluate(ctx)\n : undefined,\n maximumFractionDigits: this.maxFractionDigits\n ? this.maxFractionDigits.evaluate(ctx)\n : undefined\n }).format(this.number.evaluate(ctx));\n }\n eachChild(fn) {\n fn(this.number);\n if (this.locale) {\n fn(this.locale);\n }\n if (this.currency) {\n fn(this.currency);\n }\n if (this.unit) {\n fn(this.unit);\n }\n if (this.minFractionDigits) {\n fn(this.minFractionDigits);\n }\n if (this.maxFractionDigits) {\n fn(this.maxFractionDigits);\n }\n }\n outputDefined() {\n return false;\n }\n}\n\nclass FormatExpression {\n constructor(sections) {\n this.type = FormattedType;\n this.sections = sections;\n }\n static parse(args, context) {\n if (args.length < 2) {\n return context.error('Expected at least one argument.');\n }\n const firstArg = args[1];\n if (!Array.isArray(firstArg) && typeof firstArg === 'object') {\n return context.error('First argument must be an image or text section.');\n }\n const sections = [];\n let nextTokenMayBeObject = false;\n for (let i = 1; i <= args.length - 1; ++i) {\n const arg = args[i];\n if (nextTokenMayBeObject && typeof arg === 'object' && !Array.isArray(arg)) {\n nextTokenMayBeObject = false;\n let scale = null;\n if (arg['font-scale']) {\n scale = context.parse(arg['font-scale'], 1, NumberType);\n if (!scale)\n return null;\n }\n let font = null;\n if (arg['text-font']) {\n font = context.parse(arg['text-font'], 1, array(StringType));\n if (!font)\n return null;\n }\n let textColor = null;\n if (arg['text-color']) {\n textColor = context.parse(arg['text-color'], 1, ColorType);\n if (!textColor)\n return null;\n }\n let verticalAlign = null;\n if (arg['vertical-align']) {\n if (typeof arg['vertical-align'] === 'string' &&\n !VERTICAL_ALIGN_OPTIONS.includes(arg['vertical-align'])) {\n return context.error(`'vertical-align' must be one of: 'bottom', 'center', 'top' but found '${arg['vertical-align']}' instead.`);\n }\n verticalAlign = context.parse(arg['vertical-align'], 1, StringType);\n if (!verticalAlign)\n return null;\n }\n const lastExpression = sections[sections.length - 1];\n lastExpression.scale = scale;\n lastExpression.font = font;\n lastExpression.textColor = textColor;\n lastExpression.verticalAlign = verticalAlign;\n }\n else {\n const content = context.parse(args[i], 1, ValueType);\n if (!content)\n return null;\n const kind = content.type.kind;\n if (kind !== 'string' &&\n kind !== 'value' &&\n kind !== 'null' &&\n kind !== 'resolvedImage')\n return context.error(\"Formatted text type must be 'string', 'value', 'image' or 'null'.\");\n nextTokenMayBeObject = true;\n sections.push({\n content,\n scale: null,\n font: null,\n textColor: null,\n verticalAlign: null\n });\n }\n }\n return new FormatExpression(sections);\n }\n evaluate(ctx) {\n const evaluateSection = (section) => {\n const evaluatedContent = section.content.evaluate(ctx);\n if (typeOf(evaluatedContent) === ResolvedImageType) {\n return new FormattedSection('', evaluatedContent, null, null, null, section.verticalAlign ? section.verticalAlign.evaluate(ctx) : null);\n }\n return new FormattedSection(valueToString(evaluatedContent), null, section.scale ? section.scale.evaluate(ctx) : null, section.font ? section.font.evaluate(ctx).join(',') : null, section.textColor ? section.textColor.evaluate(ctx) : null, section.verticalAlign ? section.verticalAlign.evaluate(ctx) : null);\n };\n return new Formatted(this.sections.map(evaluateSection));\n }\n eachChild(fn) {\n for (const section of this.sections) {\n fn(section.content);\n if (section.scale) {\n fn(section.scale);\n }\n if (section.font) {\n fn(section.font);\n }\n if (section.textColor) {\n fn(section.textColor);\n }\n if (section.verticalAlign) {\n fn(section.verticalAlign);\n }\n }\n }\n outputDefined() {\n // Technically the combinatoric set of all children\n // Usually, this.text will be undefined anyway\n return false;\n }\n}\n\nclass ImageExpression {\n constructor(input) {\n this.type = ResolvedImageType;\n this.input = input;\n }\n static parse(args, context) {\n if (args.length !== 2) {\n return context.error('Expected two arguments.');\n }\n const name = context.parse(args[1], 1, StringType);\n if (!name)\n return context.error('No image name provided.');\n return new ImageExpression(name);\n }\n evaluate(ctx) {\n const evaluatedImageName = this.input.evaluate(ctx);\n const value = ResolvedImage.fromString(evaluatedImageName);\n if (value && ctx.availableImages)\n value.available = ctx.availableImages.indexOf(evaluatedImageName) > -1;\n return value;\n }\n eachChild(fn) {\n fn(this.input);\n }\n outputDefined() {\n // The output of image is determined by the list of available images in the evaluation context\n return false;\n }\n}\n\nclass Length {\n constructor(input) {\n this.type = NumberType;\n this.input = input;\n }\n static parse(args, context) {\n if (args.length !== 2)\n return context.error(`Expected 1 argument, but found ${args.length - 1} instead.`);\n const input = context.parse(args[1], 1);\n if (!input)\n return null;\n if (input.type.kind !== 'array' &&\n input.type.kind !== 'string' &&\n input.type.kind !== 'value')\n return context.error(`Expected argument of type string or array, but found ${typeToString(input.type)} instead.`);\n return new Length(input);\n }\n evaluate(ctx) {\n const input = this.input.evaluate(ctx);\n if (typeof input === 'string') {\n // The length may be affected by surrogate pairs.\n return [...input].length;\n }\n else if (Array.isArray(input)) {\n return input.length;\n }\n else {\n throw new RuntimeError(`Expected value to be of type string or array, but found ${typeToString(typeOf(input))} instead.`);\n }\n }\n eachChild(fn) {\n fn(this.input);\n }\n outputDefined() {\n return false;\n }\n}\n\nconst EXTENT = 8192;\nfunction getTileCoordinates(p, canonical) {\n const x = mercatorXfromLng(p[0]);\n const y = mercatorYfromLat(p[1]);\n const tilesAtZoom = Math.pow(2, canonical.z);\n return [Math.round(x * tilesAtZoom * EXTENT), Math.round(y * tilesAtZoom * EXTENT)];\n}\nfunction getLngLatFromTileCoord(coord, canonical) {\n const tilesAtZoom = Math.pow(2, canonical.z);\n const x = (coord[0] / EXTENT + canonical.x) / tilesAtZoom;\n const y = (coord[1] / EXTENT + canonical.y) / tilesAtZoom;\n return [lngFromMercatorXfromLng(x), latFromMercatorY(y)];\n}\nfunction mercatorXfromLng(lng) {\n return (180 + lng) / 360;\n}\nfunction lngFromMercatorXfromLng(mercatorX) {\n return mercatorX * 360 - 180;\n}\nfunction mercatorYfromLat(lat) {\n return (180 - (180 / Math.PI) * Math.log(Math.tan(Math.PI / 4 + (lat * Math.PI) / 360))) / 360;\n}\nfunction latFromMercatorY(mercatorY) {\n return (360 / Math.PI) * Math.atan(Math.exp(((180 - mercatorY * 360) * Math.PI) / 180)) - 90;\n}\nfunction updateBBox(bbox, coord) {\n bbox[0] = Math.min(bbox[0], coord[0]);\n bbox[1] = Math.min(bbox[1], coord[1]);\n bbox[2] = Math.max(bbox[2], coord[0]);\n bbox[3] = Math.max(bbox[3], coord[1]);\n}\nfunction boxWithinBox(bbox1, bbox2) {\n if (bbox1[0] <= bbox2[0])\n return false;\n if (bbox1[2] >= bbox2[2])\n return false;\n if (bbox1[1] <= bbox2[1])\n return false;\n if (bbox1[3] >= bbox2[3])\n return false;\n return true;\n}\nfunction rayIntersect(p, p1, p2) {\n return (p1[1] > p[1] !== p2[1] > p[1] &&\n p[0] < ((p2[0] - p1[0]) * (p[1] - p1[1])) / (p2[1] - p1[1]) + p1[0]);\n}\nfunction pointOnBoundary(p, p1, p2) {\n const x1 = p[0] - p1[0];\n const y1 = p[1] - p1[1];\n const x2 = p[0] - p2[0];\n const y2 = p[1] - p2[1];\n return x1 * y2 - x2 * y1 === 0 && x1 * x2 <= 0 && y1 * y2 <= 0;\n}\n// a, b are end points for line segment1, c and d are end points for line segment2\nfunction segmentIntersectSegment(a, b, c, d) {\n // check if two segments are parallel or not\n // precondition is end point a, b is inside polygon, if line a->b is\n // parallel to polygon edge c->d, then a->b won't intersect with c->d\n const vectorP = [b[0] - a[0], b[1] - a[1]];\n const vectorQ = [d[0] - c[0], d[1] - c[1]];\n if (perp(vectorQ, vectorP) === 0)\n return false;\n // If lines are intersecting with each other, the relative location should be:\n // a and b lie in different sides of segment c->d\n // c and d lie in different sides of segment a->b\n if (twoSided(a, b, c, d) && twoSided(c, d, a, b))\n return true;\n return false;\n}\nfunction lineIntersectPolygon(p1, p2, polygon) {\n for (const ring of polygon) {\n // loop through every edge of the ring\n for (let j = 0; j < ring.length - 1; ++j) {\n if (segmentIntersectSegment(p1, p2, ring[j], ring[j + 1])) {\n return true;\n }\n }\n }\n return false;\n}\n// ray casting algorithm for detecting if point is in polygon\nfunction pointWithinPolygon(point, rings, trueIfOnBoundary = false) {\n let inside = false;\n for (const ring of rings) {\n for (let j = 0; j < ring.length - 1; j++) {\n if (pointOnBoundary(point, ring[j], ring[j + 1]))\n return trueIfOnBoundary;\n if (rayIntersect(point, ring[j], ring[j + 1]))\n inside = !inside;\n }\n }\n return inside;\n}\nfunction pointWithinPolygons(point, polygons) {\n for (const polygon of polygons) {\n if (pointWithinPolygon(point, polygon))\n return true;\n }\n return false;\n}\nfunction lineStringWithinPolygon(line, polygon) {\n // First, check if geometry points of line segments are all inside polygon\n for (const point of line) {\n if (!pointWithinPolygon(point, polygon)) {\n return false;\n }\n }\n // Second, check if there is line segment intersecting polygon edge\n for (let i = 0; i < line.length - 1; ++i) {\n if (lineIntersectPolygon(line[i], line[i + 1], polygon)) {\n return false;\n }\n }\n return true;\n}\nfunction lineStringWithinPolygons(line, polygons) {\n for (const polygon of polygons) {\n if (lineStringWithinPolygon(line, polygon))\n return true;\n }\n return false;\n}\nfunction perp(v1, v2) {\n return v1[0] * v2[1] - v1[1] * v2[0];\n}\n// check if p1 and p2 are in different sides of line segment q1->q2\nfunction twoSided(p1, p2, q1, q2) {\n // q1->p1 (x1, y1), q1->p2 (x2, y2), q1->q2 (x3, y3)\n const x1 = p1[0] - q1[0];\n const y1 = p1[1] - q1[1];\n const x2 = p2[0] - q1[0];\n const y2 = p2[1] - q1[1];\n const x3 = q2[0] - q1[0];\n const y3 = q2[1] - q1[1];\n const det1 = x1 * y3 - x3 * y1;\n const det2 = x2 * y3 - x3 * y2;\n if ((det1 > 0 && det2 < 0) || (det1 < 0 && det2 > 0))\n return true;\n return false;\n}\n\nfunction getTilePolygon(coordinates, bbox, canonical) {\n const polygon = [];\n for (let i = 0; i < coordinates.length; i++) {\n const ring = [];\n for (let j = 0; j < coordinates[i].length; j++) {\n const coord = getTileCoordinates(coordinates[i][j], canonical);\n updateBBox(bbox, coord);\n ring.push(coord);\n }\n polygon.push(ring);\n }\n return polygon;\n}\nfunction getTilePolygons(coordinates, bbox, canonical) {\n const polygons = [];\n for (let i = 0; i < coordinates.length; i++) {\n const polygon = getTilePolygon(coordinates[i], bbox, canonical);\n polygons.push(polygon);\n }\n return polygons;\n}\nfunction updatePoint(p, bbox, polyBBox, worldSize) {\n if (p[0] < polyBBox[0] || p[0] > polyBBox[2]) {\n const halfWorldSize = worldSize * 0.5;\n let shift = p[0] - polyBBox[0] > halfWorldSize\n ? -worldSize\n : polyBBox[0] - p[0] > halfWorldSize\n ? worldSize\n : 0;\n if (shift === 0) {\n shift =\n p[0] - polyBBox[2] > halfWorldSize\n ? -worldSize\n : polyBBox[2] - p[0] > halfWorldSize\n ? worldSize\n : 0;\n }\n p[0] += shift;\n }\n updateBBox(bbox, p);\n}\nfunction resetBBox(bbox) {\n bbox[0] = bbox[1] = Infinity;\n bbox[2] = bbox[3] = -Infinity;\n}\nfunction getTilePoints(geometry, pointBBox, polyBBox, canonical) {\n const worldSize = Math.pow(2, canonical.z) * EXTENT;\n const shifts = [canonical.x * EXTENT, canonical.y * EXTENT];\n const tilePoints = [];\n for (const points of geometry) {\n for (const point of points) {\n const p = [point.x + shifts[0], point.y + shifts[1]];\n updatePoint(p, pointBBox, polyBBox, worldSize);\n tilePoints.push(p);\n }\n }\n return tilePoints;\n}\nfunction getTileLines(geometry, lineBBox, polyBBox, canonical) {\n const worldSize = Math.pow(2, canonical.z) * EXTENT;\n const shifts = [canonical.x * EXTENT, canonical.y * EXTENT];\n const tileLines = [];\n for (const line of geometry) {\n const tileLine = [];\n for (const point of line) {\n const p = [point.x + shifts[0], point.y + shifts[1]];\n updateBBox(lineBBox, p);\n tileLine.push(p);\n }\n tileLines.push(tileLine);\n }\n if (lineBBox[2] - lineBBox[0] <= worldSize / 2) {\n resetBBox(lineBBox);\n for (const line of tileLines) {\n for (const p of line) {\n updatePoint(p, lineBBox, polyBBox, worldSize);\n }\n }\n }\n return tileLines;\n}\nfunction pointsWithinPolygons(ctx, polygonGeometry) {\n const pointBBox = [Infinity, Infinity, -Infinity, -Infinity];\n const polyBBox = [Infinity, Infinity, -Infinity, -Infinity];\n const canonical = ctx.canonicalID();\n if (polygonGeometry.type === 'Polygon') {\n const tilePolygon = getTilePolygon(polygonGeometry.coordinates, polyBBox, canonical);\n const tilePoints = getTilePoints(ctx.geometry(), pointBBox, polyBBox, canonical);\n if (!boxWithinBox(pointBBox, polyBBox))\n return false;\n for (const point of tilePoints) {\n if (!pointWithinPolygon(point, tilePolygon))\n return false;\n }\n }\n if (polygonGeometry.type === 'MultiPolygon') {\n const tilePolygons = getTilePolygons(polygonGeometry.coordinates, polyBBox, canonical);\n const tilePoints = getTilePoints(ctx.geometry(), pointBBox, polyBBox, canonical);\n if (!boxWithinBox(pointBBox, polyBBox))\n return false;\n for (const point of tilePoints) {\n if (!pointWithinPolygons(point, tilePolygons))\n return false;\n }\n }\n return true;\n}\nfunction linesWithinPolygons(ctx, polygonGeometry) {\n const lineBBox = [Infinity, Infinity, -Infinity, -Infinity];\n const polyBBox = [Infinity, Infinity, -Infinity, -Infinity];\n const canonical = ctx.canonicalID();\n if (polygonGeometry.type === 'Polygon') {\n const tilePolygon = getTilePolygon(polygonGeometry.coordinates, polyBBox, canonical);\n const tileLines = getTileLines(ctx.geometry(), lineBBox, polyBBox, canonical);\n if (!boxWithinBox(lineBBox, polyBBox))\n return false;\n for (const line of tileLines) {\n if (!lineStringWithinPolygon(line, tilePolygon))\n return false;\n }\n }\n if (polygonGeometry.type === 'MultiPolygon') {\n const tilePolygons = getTilePolygons(polygonGeometry.coordinates, polyBBox, canonical);\n const tileLines = getTileLines(ctx.geometry(), lineBBox, polyBBox, canonical);\n if (!boxWithinBox(lineBBox, polyBBox))\n return false;\n for (const line of tileLines) {\n if (!lineStringWithinPolygons(line, tilePolygons))\n return false;\n }\n }\n return true;\n}\nclass Within {\n constructor(geojson, geometries) {\n this.type = BooleanType;\n this.geojson = geojson;\n this.geometries = geometries;\n }\n static parse(args, context) {\n if (args.length !== 2)\n return context.error(`'within' expression requires exactly one argument, but found ${args.length - 1} instead.`);\n if (isValue(args[1])) {\n const geojson = args[1];\n if (geojson.type === 'FeatureCollection') {\n const polygonsCoords = [];\n for (const polygon of geojson.features) {\n const { type, coordinates } = polygon.geometry;\n if (type === 'Polygon') {\n polygonsCoords.push(coordinates);\n }\n if (type === 'MultiPolygon') {\n polygonsCoords.push(...coordinates);\n }\n }\n if (polygonsCoords.length) {\n const multipolygonWrapper = {\n type: 'MultiPolygon',\n coordinates: polygonsCoords\n };\n return new Within(geojson, multipolygonWrapper);\n }\n }\n else if (geojson.type === 'Feature') {\n const type = geojson.geometry.type;\n if (type === 'Polygon' || type === 'MultiPolygon') {\n return new Within(geojson, geojson.geometry);\n }\n }\n else if (geojson.type === 'Polygon' || geojson.type === 'MultiPolygon') {\n return new Within(geojson, geojson);\n }\n }\n return context.error(\"'within' expression requires valid geojson object that contains polygon geometry type.\");\n }\n evaluate(ctx) {\n if (ctx.geometry() != null && ctx.canonicalID() != null) {\n if (ctx.geometryType() === 'Point') {\n return pointsWithinPolygons(ctx, this.geometries);\n }\n else if (ctx.geometryType() === 'LineString') {\n return linesWithinPolygons(ctx, this.geometries);\n }\n }\n return false;\n }\n eachChild() { }\n outputDefined() {\n return true;\n }\n}\n\nclass TinyQueue {\n constructor(data = [], compare = (a, b) => (a < b ? -1 : a > b ? 1 : 0)) {\n this.data = data;\n this.length = this.data.length;\n this.compare = compare;\n\n if (this.length > 0) {\n for (let i = (this.length >> 1) - 1; i >= 0; i--) this._down(i);\n }\n }\n\n push(item) {\n this.data.push(item);\n this._up(this.length++);\n }\n\n pop() {\n if (this.length === 0) return undefined;\n\n const top = this.data[0];\n const bottom = this.data.pop();\n\n if (--this.length > 0) {\n this.data[0] = bottom;\n this._down(0);\n }\n\n return top;\n }\n\n peek() {\n return this.data[0];\n }\n\n _up(pos) {\n const {data, compare} = this;\n const item = data[pos];\n\n while (pos > 0) {\n const parent = (pos - 1) >> 1;\n const current = data[parent];\n if (compare(item, current) >= 0) break;\n data[pos] = current;\n pos = parent;\n }\n\n data[pos] = item;\n }\n\n _down(pos) {\n const {data, compare} = this;\n const halfLength = this.length >> 1;\n const item = data[pos];\n\n while (pos < halfLength) {\n let bestChild = (pos << 1) + 1; // initially it is the left child\n const right = bestChild + 1;\n\n if (right < this.length && compare(data[right], data[bestChild]) < 0) {\n bestChild = right;\n }\n if (compare(data[bestChild], item) >= 0) break;\n\n data[pos] = data[bestChild];\n pos = bestChild;\n }\n\n data[pos] = item;\n }\n}\n\n/**\n * Rearranges items so that all items in the [left, k] are the smallest.\n * The k-th element will have the (k - left + 1)-th smallest value in [left, right].\n *\n * @template T\n * @param {T[]} arr the array to partially sort (in place)\n * @param {number} k middle index for partial sorting (as defined above)\n * @param {number} [left=0] left index of the range to sort\n * @param {number} [right=arr.length-1] right index\n * @param {(a: T, b: T) => number} [compare = (a, b) => a - b] compare function\n */\nfunction quickselect(arr, k, left = 0, right = arr.length - 1, compare = defaultCompare) {\n\n while (right > left) {\n if (right - left > 600) {\n const n = right - left + 1;\n const m = k - left + 1;\n const z = Math.log(n);\n const s = 0.5 * Math.exp(2 * z / 3);\n const sd = 0.5 * Math.sqrt(z * s * (n - s) / n) * (m - n / 2 < 0 ? -1 : 1);\n const newLeft = Math.max(left, Math.floor(k - m * s / n + sd));\n const newRight = Math.min(right, Math.floor(k + (n - m) * s / n + sd));\n quickselect(arr, k, newLeft, newRight, compare);\n }\n\n const t = arr[k];\n let i = left;\n /** @type {number} */\n let j = right;\n\n swap(arr, left, k);\n if (compare(arr[right], t) > 0) swap(arr, left, right);\n\n while (i < j) {\n swap(arr, i, j);\n i++;\n j--;\n while (compare(arr[i], t) < 0) i++;\n while (compare(arr[j], t) > 0) j--;\n }\n\n if (compare(arr[left], t) === 0) swap(arr, left, j);\n else {\n j++;\n swap(arr, j, right);\n }\n\n if (j <= k) left = j + 1;\n if (k <= j) right = j - 1;\n }\n}\n\n/**\n * @template T\n * @param {T[]} arr\n * @param {number} i\n * @param {number} j\n */\nfunction swap(arr, i, j) {\n const tmp = arr[i];\n arr[i] = arr[j];\n arr[j] = tmp;\n}\n\n/**\n * @template T\n * @param {T} a\n * @param {T} b\n * @returns {number}\n */\nfunction defaultCompare(a, b) {\n return a < b ? -1 : a > b ? 1 : 0;\n}\n\n/**\n * Classifies an array of rings into polygons with outer rings and holes\n * @param rings - the rings to classify\n * @param maxRings - the maximum number of rings to include in a polygon, use 0 to include all rings\n * @returns an array of polygons with internal rings as holes\n */\nfunction classifyRings(rings, maxRings) {\n const len = rings.length;\n if (len <= 1)\n return [rings];\n const polygons = [];\n let polygon;\n let ccw;\n for (const ring of rings) {\n const area = calculateSignedArea(ring);\n if (area === 0)\n continue;\n ring.area = Math.abs(area);\n if (ccw === undefined)\n ccw = area < 0;\n if (ccw === area < 0) {\n if (polygon)\n polygons.push(polygon);\n polygon = [ring];\n }\n else {\n polygon.push(ring);\n }\n }\n if (polygon)\n polygons.push(polygon);\n // Earcut performance degrades with the # of rings in a polygon. For this\n // reason, we limit strip out all but the `maxRings` largest rings.\n if (maxRings > 1) {\n for (let j = 0; j < polygons.length; j++) {\n if (polygons[j].length <= maxRings)\n continue;\n quickselect(polygons[j], maxRings, 1, polygons[j].length - 1, compareAreas);\n polygons[j] = polygons[j].slice(0, maxRings);\n }\n }\n return polygons;\n}\nfunction compareAreas(a, b) {\n return b.area - a.area;\n}\n/**\n * Returns the signed area for the polygon ring. Positive areas are exterior rings and\n * have a clockwise winding. Negative areas are interior rings and have a counter clockwise\n * ordering.\n *\n * @param ring - Exterior or interior ring\n * @returns Signed area\n */\nfunction calculateSignedArea(ring) {\n let sum = 0;\n for (let i = 0, len = ring.length, j = len - 1, p1, p2; i < len; j = i++) {\n p1 = ring[i];\n p2 = ring[j];\n sum += (p2.x - p1.x) * (p1.y + p2.y);\n }\n return sum;\n}\n\n// This is taken from https://github.com/mapbox/cheap-ruler/ in order to take only the relevant parts\n// Values that define WGS84 ellipsoid model of the Earth\nconst RE = 6378.137; // equatorial radius\nconst FE = 1 / 298.257223563; // flattening\nconst E2 = FE * (2 - FE);\nconst RAD = Math.PI / 180;\nclass CheapRuler {\n constructor(lat) {\n // Curvature formulas from https://en.wikipedia.org/wiki/Earth_radius#Meridional\n const m = RAD * RE * 1000;\n const coslat = Math.cos(lat * RAD);\n const w2 = 1 / (1 - E2 * (1 - coslat * coslat));\n const w = Math.sqrt(w2);\n // multipliers for converting longitude and latitude degrees into distance\n this.kx = m * w * coslat; // based on normal radius of curvature\n this.ky = m * w * w2 * (1 - E2); // based on meridional radius of curvature\n }\n /**\n * Given two points of the form [longitude, latitude], returns the distance.\n *\n * @param a - point [longitude, latitude]\n * @param b - point [longitude, latitude]\n * @returns distance\n * @example\n * const distance = ruler.distance([30.5, 50.5], [30.51, 50.49]);\n * //=distance\n */\n distance(a, b) {\n const dx = this.wrap(a[0] - b[0]) * this.kx;\n const dy = (a[1] - b[1]) * this.ky;\n return Math.sqrt(dx * dx + dy * dy);\n }\n /**\n * Returns an object of the form {point, index, t}, where point is closest point on the line\n * from the given point, index is the start index of the segment with the closest point,\n * and t is a parameter from 0 to 1 that indicates where the closest point is on that segment.\n *\n * @param line - an array of points that form the line\n * @param p - point [longitude, latitude]\n * @returns the nearest point, its index in the array and the proportion along the line\n * @example\n * const point = ruler.pointOnLine(line, [-67.04, 50.5]).point;\n * //=point\n */\n pointOnLine(line, p) {\n let minDist = Infinity;\n let minX, minY, minI, minT;\n for (let i = 0; i < line.length - 1; i++) {\n let x = line[i][0];\n let y = line[i][1];\n let dx = this.wrap(line[i + 1][0] - x) * this.kx;\n let dy = (line[i + 1][1] - y) * this.ky;\n let t = 0;\n if (dx !== 0 || dy !== 0) {\n t =\n (this.wrap(p[0] - x) * this.kx * dx + (p[1] - y) * this.ky * dy) /\n (dx * dx + dy * dy);\n if (t > 1) {\n x = line[i + 1][0];\n y = line[i + 1][1];\n }\n else if (t > 0) {\n x += (dx / this.kx) * t;\n y += (dy / this.ky) * t;\n }\n }\n dx = this.wrap(p[0] - x) * this.kx;\n dy = (p[1] - y) * this.ky;\n const sqDist = dx * dx + dy * dy;\n if (sqDist < minDist) {\n minDist = sqDist;\n minX = x;\n minY = y;\n minI = i;\n minT = t;\n }\n }\n return {\n point: [minX, minY],\n index: minI,\n t: Math.max(0, Math.min(1, minT))\n };\n }\n wrap(deg) {\n while (deg < -180)\n deg += 360;\n while (deg > 180)\n deg -= 360;\n return deg;\n }\n}\n\nconst MinPointsSize = 100;\nconst MinLinePointsSize = 50;\nfunction compareDistPair(a, b) {\n return b[0] - a[0];\n}\nfunction getRangeSize(range) {\n return range[1] - range[0] + 1;\n}\nfunction isRangeSafe(range, threshold) {\n return range[1] >= range[0] && range[1] < threshold;\n}\nfunction splitRange(range, isLine) {\n if (range[0] > range[1]) {\n return [null, null];\n }\n const size = getRangeSize(range);\n if (isLine) {\n if (size === 2) {\n return [range, null];\n }\n const size1 = Math.floor(size / 2);\n return [\n [range[0], range[0] + size1],\n [range[0] + size1, range[1]]\n ];\n }\n if (size === 1) {\n return [range, null];\n }\n const size1 = Math.floor(size / 2) - 1;\n return [\n [range[0], range[0] + size1],\n [range[0] + size1 + 1, range[1]]\n ];\n}\nfunction getBBox(coords, range) {\n if (!isRangeSafe(range, coords.length)) {\n return [Infinity, Infinity, -Infinity, -Infinity];\n }\n const bbox = [Infinity, Infinity, -Infinity, -Infinity];\n for (let i = range[0]; i <= range[1]; ++i) {\n updateBBox(bbox, coords[i]);\n }\n return bbox;\n}\nfunction getPolygonBBox(polygon) {\n const bbox = [Infinity, Infinity, -Infinity, -Infinity];\n for (const ring of polygon) {\n for (const coord of ring) {\n updateBBox(bbox, coord);\n }\n }\n return bbox;\n}\nfunction isValidBBox(bbox) {\n return (bbox[0] !== -Infinity &&\n bbox[1] !== -Infinity &&\n bbox[2] !== Infinity &&\n bbox[3] !== Infinity);\n}\n// Calculate the distance between two bounding boxes.\n// Calculate the delta in x and y direction, and use two fake points {0.0, 0.0}\n// and {dx, dy} to calculate the distance. Distance will be 0.0 if bounding box are overlapping.\nfunction bboxToBBoxDistance(bbox1, bbox2, ruler) {\n if (!isValidBBox(bbox1) || !isValidBBox(bbox2)) {\n return NaN;\n }\n let dx = 0.0;\n let dy = 0.0;\n // bbox1 in left side\n if (bbox1[2] < bbox2[0]) {\n dx = bbox2[0] - bbox1[2];\n }\n // bbox1 in right side\n if (bbox1[0] > bbox2[2]) {\n dx = bbox1[0] - bbox2[2];\n }\n // bbox1 in above side\n if (bbox1[1] > bbox2[3]) {\n dy = bbox1[1] - bbox2[3];\n }\n // bbox1 in down side\n if (bbox1[3] < bbox2[1]) {\n dy = bbox2[1] - bbox1[3];\n }\n return ruler.distance([0.0, 0.0], [dx, dy]);\n}\nfunction pointToLineDistance(point, line, ruler) {\n const nearestPoint = ruler.pointOnLine(line, point);\n return ruler.distance(point, nearestPoint.point);\n}\nfunction segmentToSegmentDistance(p1, p2, q1, q2, ruler) {\n const dist1 = Math.min(pointToLineDistance(p1, [q1, q2], ruler), pointToLineDistance(p2, [q1, q2], ruler));\n const dist2 = Math.min(pointToLineDistance(q1, [p1, p2], ruler), pointToLineDistance(q2, [p1, p2], ruler));\n return Math.min(dist1, dist2);\n}\nfunction lineToLineDistance(line1, range1, line2, range2, ruler) {\n const rangeSafe = isRangeSafe(range1, line1.length) && isRangeSafe(range2, line2.length);\n if (!rangeSafe) {\n return Infinity;\n }\n let dist = Infinity;\n for (let i = range1[0]; i < range1[1]; ++i) {\n const p1 = line1[i];\n const p2 = line1[i + 1];\n for (let j = range2[0]; j < range2[1]; ++j) {\n const q1 = line2[j];\n const q2 = line2[j + 1];\n if (segmentIntersectSegment(p1, p2, q1, q2)) {\n return 0.0;\n }\n dist = Math.min(dist, segmentToSegmentDistance(p1, p2, q1, q2, ruler));\n }\n }\n return dist;\n}\nfunction pointsToPointsDistance(points1, range1, points2, range2, ruler) {\n const rangeSafe = isRangeSafe(range1, points1.length) && isRangeSafe(range2, points2.length);\n if (!rangeSafe) {\n return NaN;\n }\n let dist = Infinity;\n for (let i = range1[0]; i <= range1[1]; ++i) {\n for (let j = range2[0]; j <= range2[1]; ++j) {\n dist = Math.min(dist, ruler.distance(points1[i], points2[j]));\n if (dist === 0.0) {\n return dist;\n }\n }\n }\n return dist;\n}\nfunction pointToPolygonDistance(point, polygon, ruler) {\n if (pointWithinPolygon(point, polygon, true)) {\n return 0.0;\n }\n let dist = Infinity;\n for (const ring of polygon) {\n const front = ring[0];\n const back = ring[ring.length - 1];\n if (front !== back) {\n dist = Math.min(dist, pointToLineDistance(point, [back, front], ruler));\n if (dist === 0.0) {\n return dist;\n }\n }\n const nearestPoint = ruler.pointOnLine(ring, point);\n dist = Math.min(dist, ruler.distance(point, nearestPoint.point));\n if (dist === 0.0) {\n return dist;\n }\n }\n return dist;\n}\nfunction lineToPolygonDistance(line, range, polygon, ruler) {\n if (!isRangeSafe(range, line.length)) {\n return NaN;\n }\n for (let i = range[0]; i <= range[1]; ++i) {\n if (pointWithinPolygon(line[i], polygon, true)) {\n return 0.0;\n }\n }\n let dist = Infinity;\n for (let i = range[0]; i < range[1]; ++i) {\n const p1 = line[i];\n const p2 = line[i + 1];\n for (const ring of polygon) {\n for (let j = 0, len = ring.length, k = len - 1; j < len; k = j++) {\n const q1 = ring[k];\n const q2 = ring[j];\n if (segmentIntersectSegment(p1, p2, q1, q2)) {\n return 0.0;\n }\n dist = Math.min(dist, segmentToSegmentDistance(p1, p2, q1, q2, ruler));\n }\n }\n }\n return dist;\n}\nfunction polygonIntersect(poly1, poly2) {\n for (const ring of poly1) {\n for (const point of ring) {\n if (pointWithinPolygon(point, poly2, true)) {\n return true;\n }\n }\n }\n return false;\n}\nfunction polygonToPolygonDistance(polygon1, polygon2, ruler, currentMiniDist = Infinity) {\n const bbox1 = getPolygonBBox(polygon1);\n const bbox2 = getPolygonBBox(polygon2);\n if (currentMiniDist !== Infinity &&\n bboxToBBoxDistance(bbox1, bbox2, ruler) >= currentMiniDist) {\n return currentMiniDist;\n }\n if (boxWithinBox(bbox1, bbox2)) {\n if (polygonIntersect(polygon1, polygon2)) {\n return 0.0;\n }\n }\n else if (polygonIntersect(polygon2, polygon1)) {\n return 0.0;\n }\n let dist = Infinity;\n for (const ring1 of polygon1) {\n for (let i = 0, len1 = ring1.length, l = len1 - 1; i < len1; l = i++) {\n const p1 = ring1[l];\n const p2 = ring1[i];\n for (const ring2 of polygon2) {\n for (let j = 0, len2 = ring2.length, k = len2 - 1; j < len2; k = j++) {\n const q1 = ring2[k];\n const q2 = ring2[j];\n if (segmentIntersectSegment(p1, p2, q1, q2)) {\n return 0.0;\n }\n dist = Math.min(dist, segmentToSegmentDistance(p1, p2, q1, q2, ruler));\n }\n }\n }\n }\n return dist;\n}\nfunction updateQueue(distQueue, miniDist, ruler, points, polyBBox, rangeA) {\n if (!rangeA) {\n return;\n }\n const tempDist = bboxToBBoxDistance(getBBox(points, rangeA), polyBBox, ruler);\n // Insert new pair to the queue if the bbox distance is less than\n // miniDist, The pair with biggest distance will be at the top\n if (tempDist < miniDist) {\n distQueue.push([tempDist, rangeA, [0, 0]]);\n }\n}\nfunction updateQueueTwoSets(distQueue, miniDist, ruler, pointSet1, pointSet2, range1, range2) {\n if (!range1 || !range2) {\n return;\n }\n const tempDist = bboxToBBoxDistance(getBBox(pointSet1, range1), getBBox(pointSet2, range2), ruler);\n // Insert new pair to the queue if the bbox distance is less than\n // miniDist, The pair with biggest distance will be at the top\n if (tempDist < miniDist) {\n distQueue.push([tempDist, range1, range2]);\n }\n}\n// Divide and conquer, the time complexity is O(n*lgn), faster than Brute force\n// O(n*n) Most of the time, use index for in-place processing.\nfunction pointsToPolygonDistance(points, isLine, polygon, ruler, currentMiniDist = Infinity) {\n let miniDist = Math.min(ruler.distance(points[0], polygon[0][0]), currentMiniDist);\n if (miniDist === 0.0) {\n return miniDist;\n }\n const distQueue = new TinyQueue([[0, [0, points.length - 1], [0, 0]]], compareDistPair);\n const polyBBox = getPolygonBBox(polygon);\n while (distQueue.length > 0) {\n const distPair = distQueue.pop();\n if (distPair[0] >= miniDist) {\n continue;\n }\n const range = distPair[1];\n // In case the set size are relatively small, we could use brute-force directly\n const threshold = isLine ? MinLinePointsSize : MinPointsSize;\n if (getRangeSize(range) <= threshold) {\n if (!isRangeSafe(range, points.length)) {\n return NaN;\n }\n if (isLine) {\n const tempDist = lineToPolygonDistance(points, range, polygon, ruler);\n if (isNaN(tempDist) || tempDist === 0.0) {\n return tempDist;\n }\n miniDist = Math.min(miniDist, tempDist);\n }\n else {\n for (let i = range[0]; i <= range[1]; ++i) {\n const tempDist = pointToPolygonDistance(points[i], polygon, ruler);\n miniDist = Math.min(miniDist, tempDist);\n if (miniDist === 0.0) {\n return 0.0;\n }\n }\n }\n }\n else {\n const newRangesA = splitRange(range, isLine);\n updateQueue(distQueue, miniDist, ruler, points, polyBBox, newRangesA[0]);\n updateQueue(distQueue, miniDist, ruler, points, polyBBox, newRangesA[1]);\n }\n }\n return miniDist;\n}\nfunction pointSetToPointSetDistance(pointSet1, isLine1, pointSet2, isLine2, ruler, currentMiniDist = Infinity) {\n let miniDist = Math.min(currentMiniDist, ruler.distance(pointSet1[0], pointSet2[0]));\n if (miniDist === 0.0) {\n return miniDist;\n }\n const distQueue = new TinyQueue([[0, [0, pointSet1.length - 1], [0, pointSet2.length - 1]]], compareDistPair);\n while (distQueue.length > 0) {\n const distPair = distQueue.pop();\n if (distPair[0] >= miniDist) {\n continue;\n }\n const rangeA = distPair[1];\n const rangeB = distPair[2];\n const threshold1 = isLine1 ? MinLinePointsSize : MinPointsSize;\n const threshold2 = isLine2 ? MinLinePointsSize : MinPointsSize;\n // In case the set size are relatively small, we could use brute-force directly\n if (getRangeSize(rangeA) <= threshold1 && getRangeSize(rangeB) <= threshold2) {\n if (!isRangeSafe(rangeA, pointSet1.length) && isRangeSafe(rangeB, pointSet2.length)) {\n return NaN;\n }\n let tempDist;\n if (isLine1 && isLine2) {\n tempDist = lineToLineDistance(pointSet1, rangeA, pointSet2, rangeB, ruler);\n miniDist = Math.min(miniDist, tempDist);\n }\n else if (isLine1 && !isLine2) {\n const sublibe = pointSet1.slice(rangeA[0], rangeA[1] + 1);\n for (let i = rangeB[0]; i <= rangeB[1]; ++i) {\n tempDist = pointToLineDistance(pointSet2[i], sublibe, ruler);\n miniDist = Math.min(miniDist, tempDist);\n if (miniDist === 0.0) {\n return miniDist;\n }\n }\n }\n else if (!isLine1 && isLine2) {\n const sublibe = pointSet2.slice(rangeB[0], rangeB[1] + 1);\n for (let i = rangeA[0]; i <= rangeA[1]; ++i) {\n tempDist = pointToLineDistance(pointSet1[i], sublibe, ruler);\n miniDist = Math.min(miniDist, tempDist);\n if (miniDist === 0.0) {\n return miniDist;\n }\n }\n }\n else {\n tempDist = pointsToPointsDistance(pointSet1, rangeA, pointSet2, rangeB, ruler);\n miniDist = Math.min(miniDist, tempDist);\n }\n }\n else {\n const newRangesA = splitRange(rangeA, isLine1);\n const newRangesB = splitRange(rangeB, isLine2);\n updateQueueTwoSets(distQueue, miniDist, ruler, pointSet1, pointSet2, newRangesA[0], newRangesB[0]);\n updateQueueTwoSets(distQueue, miniDist, ruler, pointSet1, pointSet2, newRangesA[0], newRangesB[1]);\n updateQueueTwoSets(distQueue, miniDist, ruler, pointSet1, pointSet2, newRangesA[1], newRangesB[0]);\n updateQueueTwoSets(distQueue, miniDist, ruler, pointSet1, pointSet2, newRangesA[1], newRangesB[1]);\n }\n }\n return miniDist;\n}\nfunction pointToGeometryDistance(ctx, geometries) {\n const tilePoints = ctx.geometry();\n const pointPosition = tilePoints\n .flat()\n .map((p) => getLngLatFromTileCoord([p.x, p.y], ctx.canonical));\n if (tilePoints.length === 0) {\n return NaN;\n }\n const ruler = new CheapRuler(pointPosition[0][1]);\n let dist = Infinity;\n for (const geometry of geometries) {\n switch (geometry.type) {\n case 'Point':\n dist = Math.min(dist, pointSetToPointSetDistance(pointPosition, false, [geometry.coordinates], false, ruler, dist));\n break;\n case 'LineString':\n dist = Math.min(dist, pointSetToPointSetDistance(pointPosition, false, geometry.coordinates, true, ruler, dist));\n break;\n case 'Polygon':\n dist = Math.min(dist, pointsToPolygonDistance(pointPosition, false, geometry.coordinates, ruler, dist));\n break;\n }\n if (dist === 0.0) {\n return dist;\n }\n }\n return dist;\n}\nfunction lineStringToGeometryDistance(ctx, geometries) {\n const tileLine = ctx.geometry();\n const linePositions = tileLine\n .flat()\n .map((p) => getLngLatFromTileCoord([p.x, p.y], ctx.canonical));\n if (tileLine.length === 0) {\n return NaN;\n }\n const ruler = new CheapRuler(linePositions[0][1]);\n let dist = Infinity;\n for (const geometry of geometries) {\n switch (geometry.type) {\n case 'Point':\n dist = Math.min(dist, pointSetToPointSetDistance(linePositions, true, [geometry.coordinates], false, ruler, dist));\n break;\n case 'LineString':\n dist = Math.min(dist, pointSetToPointSetDistance(linePositions, true, geometry.coordinates, true, ruler, dist));\n break;\n case 'Polygon':\n dist = Math.min(dist, pointsToPolygonDistance(linePositions, true, geometry.coordinates, ruler, dist));\n break;\n }\n if (dist === 0.0) {\n return dist;\n }\n }\n return dist;\n}\nfunction polygonToGeometryDistance(ctx, geometries) {\n const tilePolygon = ctx.geometry();\n if (tilePolygon.length === 0 || tilePolygon[0].length === 0) {\n return NaN;\n }\n const polygons = classifyRings(tilePolygon, 0).map((polygon) => {\n return polygon.map((ring) => {\n return ring.map((p) => getLngLatFromTileCoord([p.x, p.y], ctx.canonical));\n });\n });\n const ruler = new CheapRuler(polygons[0][0][0][1]);\n let dist = Infinity;\n for (const geometry of geometries) {\n for (const polygon of polygons) {\n switch (geometry.type) {\n case 'Point':\n dist = Math.min(dist, pointsToPolygonDistance([geometry.coordinates], false, polygon, ruler, dist));\n break;\n case 'LineString':\n dist = Math.min(dist, pointsToPolygonDistance(geometry.coordinates, true, polygon, ruler, dist));\n break;\n case 'Polygon':\n dist = Math.min(dist, polygonToPolygonDistance(polygon, geometry.coordinates, ruler, dist));\n break;\n }\n if (dist === 0.0) {\n return dist;\n }\n }\n }\n return dist;\n}\nfunction toSimpleGeometry(geometry) {\n if (geometry.type === 'MultiPolygon') {\n return geometry.coordinates.map((polygon) => {\n return {\n type: 'Polygon',\n coordinates: polygon\n };\n });\n }\n if (geometry.type === 'MultiLineString') {\n return geometry.coordinates.map((lineString) => {\n return {\n type: 'LineString',\n coordinates: lineString\n };\n });\n }\n if (geometry.type === 'MultiPoint') {\n return geometry.coordinates.map((point) => {\n return {\n type: 'Point',\n coordinates: point\n };\n });\n }\n return [geometry];\n}\nclass Distance {\n constructor(geojson, geometries) {\n this.type = NumberType;\n this.geojson = geojson;\n this.geometries = geometries;\n }\n static parse(args, context) {\n if (args.length !== 2)\n return context.error(`'distance' expression requires exactly one argument, but found ${args.length - 1} instead.`);\n if (isValue(args[1])) {\n const geojson = args[1];\n if (geojson.type === 'FeatureCollection') {\n return new Distance(geojson, geojson.features.map((feature) => toSimpleGeometry(feature.geometry)).flat());\n }\n else if (geojson.type === 'Feature') {\n return new Distance(geojson, toSimpleGeometry(geojson.geometry));\n }\n else if ('type' in geojson && 'coordinates' in geojson) {\n return new Distance(geojson, toSimpleGeometry(geojson));\n }\n }\n return context.error(\"'distance' expression requires valid geojson object that contains polygon geometry type.\");\n }\n evaluate(ctx) {\n if (ctx.geometry() != null && ctx.canonicalID() != null) {\n if (ctx.geometryType() === 'Point') {\n return pointToGeometryDistance(ctx, this.geometries);\n }\n else if (ctx.geometryType() === 'LineString') {\n return lineStringToGeometryDistance(ctx, this.geometries);\n }\n else if (ctx.geometryType() === 'Polygon') {\n return polygonToGeometryDistance(ctx, this.geometries);\n }\n }\n return NaN;\n }\n eachChild() { }\n outputDefined() {\n return true;\n }\n}\n\nclass GlobalState {\n constructor(key) {\n this.type = ValueType;\n this.key = key;\n }\n static parse(args, context) {\n if (args.length !== 2) {\n return context.error(`Expected 1 argument, but found ${args.length - 1} instead.`);\n }\n const key = args[1];\n if (key === undefined || key === null) {\n return context.error('Global state property must be defined.');\n }\n if (typeof key !== 'string') {\n return context.error(`Global state property must be string, but found ${typeof args[1]} instead.`);\n }\n return new GlobalState(key);\n }\n evaluate(ctx) {\n var _a;\n const globalState = (_a = ctx.globals) === null || _a === void 0 ? void 0 : _a.globalState;\n if (!globalState || Object.keys(globalState).length === 0)\n return null;\n return getOwn(globalState, this.key);\n }\n eachChild() { }\n outputDefined() {\n return false;\n }\n}\n\nconst expressions$1 = {\n // special forms\n '==': Equals,\n '!=': NotEquals,\n '>': GreaterThan,\n '<': LessThan,\n '>=': GreaterThanOrEqual,\n '<=': LessThanOrEqual,\n array: Assertion,\n at: At,\n boolean: Assertion,\n case: Case,\n coalesce: Coalesce,\n collator: CollatorExpression,\n format: FormatExpression,\n image: ImageExpression,\n in: In,\n 'index-of': IndexOf,\n interpolate: Interpolate,\n 'interpolate-hcl': Interpolate,\n 'interpolate-lab': Interpolate,\n length: Length,\n let: Let,\n literal: Literal,\n match: Match,\n number: Assertion,\n 'number-format': NumberFormat,\n object: Assertion,\n slice: Slice,\n step: Step,\n string: Assertion,\n 'to-boolean': Coercion,\n 'to-color': Coercion,\n 'to-number': Coercion,\n 'to-string': Coercion,\n var: Var,\n within: Within,\n distance: Distance,\n 'global-state': GlobalState\n};\n\nclass CompoundExpression {\n constructor(name, type, evaluate, args) {\n this.name = name;\n this.type = type;\n this._evaluate = evaluate;\n this.args = args;\n }\n evaluate(ctx) {\n return this._evaluate(ctx, this.args);\n }\n eachChild(fn) {\n this.args.forEach(fn);\n }\n outputDefined() {\n return false;\n }\n static parse(args, context) {\n const op = args[0];\n const definition = CompoundExpression.definitions[op];\n if (!definition) {\n return context.error(`Unknown expression \"${op}\". If you wanted a literal array, use [\"literal\", [...]].`, 0);\n }\n // Now check argument types against each signature\n const type = Array.isArray(definition) ? definition[0] : definition.type;\n const availableOverloads = Array.isArray(definition)\n ? [[definition[1], definition[2]]]\n : definition.overloads;\n const overloads = availableOverloads.filter(([signature]) => !Array.isArray(signature) || // varags\n signature.length === args.length - 1 // correct param count\n );\n let signatureContext = null;\n for (const [params, evaluate] of overloads) {\n // Use a fresh context for each attempted signature so that, if\n // we eventually succeed, we haven't polluted `context.errors`.\n signatureContext = new ParsingContext(context.registry, isExpressionConstant, context.path, null, context.scope);\n // First parse all the args, potentially coercing to the\n // types expected by this overload.\n const parsedArgs = [];\n let argParseFailed = false;\n for (let i = 1; i < args.length; i++) {\n const arg = args[i];\n const expectedType = Array.isArray(params)\n ? params[i - 1]\n : params.type;\n const parsed = signatureContext.parse(arg, 1 + parsedArgs.length, expectedType);\n if (!parsed) {\n argParseFailed = true;\n break;\n }\n parsedArgs.push(parsed);\n }\n if (argParseFailed) {\n // Couldn't coerce args of this overload to expected type, move\n // on to next one.\n continue;\n }\n if (Array.isArray(params)) {\n if (params.length !== parsedArgs.length) {\n signatureContext.error(`Expected ${params.length} arguments, but found ${parsedArgs.length} instead.`);\n continue;\n }\n }\n for (let i = 0; i < parsedArgs.length; i++) {\n const expected = Array.isArray(params) ? params[i] : params.type;\n const arg = parsedArgs[i];\n signatureContext.concat(i + 1).checkSubtype(expected, arg.type);\n }\n if (signatureContext.errors.length === 0) {\n return new CompoundExpression(op, type, evaluate, parsedArgs);\n }\n }\n if (overloads.length === 1) {\n context.errors.push(...signatureContext.errors);\n }\n else {\n const expected = overloads.length ? overloads : availableOverloads;\n const signatures = expected\n .map(([params]) => stringifySignature(params))\n .join(' | ');\n const actualTypes = [];\n // For error message, re-parse arguments without trying to\n // apply any coercions\n for (let i = 1; i < args.length; i++) {\n const parsed = context.parse(args[i], 1 + actualTypes.length);\n if (!parsed)\n return null;\n actualTypes.push(typeToString(parsed.type));\n }\n context.error(`Expected arguments of type ${signatures}, but found (${actualTypes.join(', ')}) instead.`);\n }\n return null;\n }\n static register(registry, definitions) {\n CompoundExpression.definitions = definitions;\n for (const name in definitions) {\n registry[name] = CompoundExpression;\n }\n }\n}\nfunction rgba(ctx, [r, g, b, a]) {\n r = r.evaluate(ctx);\n g = g.evaluate(ctx);\n b = b.evaluate(ctx);\n const alpha = a ? a.evaluate(ctx) : 1;\n const error = validateRGBA(r, g, b, alpha);\n if (error)\n throw new RuntimeError(error);\n return new Color(r / 255, g / 255, b / 255, alpha, false);\n}\nfunction has(key, obj) {\n return key in obj;\n}\nfunction get(key, obj) {\n const v = obj[key];\n return typeof v === 'undefined' ? null : v;\n}\nfunction binarySearch(v, a, i, j) {\n while (i <= j) {\n const m = (i + j) >> 1;\n if (a[m] === v)\n return true;\n if (a[m] > v)\n j = m - 1;\n else\n i = m + 1;\n }\n return false;\n}\nfunction varargs(type) {\n return { type };\n}\nCompoundExpression.register(expressions$1, {\n error: [\n ErrorType,\n [StringType],\n (ctx, [v]) => {\n throw new RuntimeError(v.evaluate(ctx));\n }\n ],\n typeof: [StringType, [ValueType], (ctx, [v]) => typeToString(typeOf(v.evaluate(ctx)))],\n 'to-rgba': [\n array(NumberType, 4),\n [ColorType],\n (ctx, [v]) => {\n const [r, g, b, a] = v.evaluate(ctx).rgb;\n return [r * 255, g * 255, b * 255, a];\n }\n ],\n rgb: [ColorType, [NumberType, NumberType, NumberType], rgba],\n rgba: [ColorType, [NumberType, NumberType, NumberType, NumberType], rgba],\n has: {\n type: BooleanType,\n overloads: [\n [[StringType], (ctx, [key]) => has(key.evaluate(ctx), ctx.properties())],\n [\n [StringType, ObjectType],\n (ctx, [key, obj]) => has(key.evaluate(ctx), obj.evaluate(ctx))\n ]\n ]\n },\n get: {\n type: ValueType,\n overloads: [\n [[StringType], (ctx, [key]) => get(key.evaluate(ctx), ctx.properties())],\n [\n [StringType, ObjectType],\n (ctx, [key, obj]) => get(key.evaluate(ctx), obj.evaluate(ctx))\n ]\n ]\n },\n 'feature-state': [\n ValueType,\n [StringType],\n (ctx, [key]) => get(key.evaluate(ctx), ctx.featureState || {})\n ],\n properties: [ObjectType, [], (ctx) => ctx.properties()],\n 'geometry-type': [StringType, [], (ctx) => ctx.geometryType()],\n id: [ValueType, [], (ctx) => ctx.id()],\n zoom: [NumberType, [], (ctx) => ctx.globals.zoom],\n 'heatmap-density': [NumberType, [], (ctx) => ctx.globals.heatmapDensity || 0],\n elevation: [NumberType, [], (ctx) => ctx.globals.elevation || 0],\n 'line-progress': [NumberType, [], (ctx) => ctx.globals.lineProgress || 0],\n accumulated: [\n ValueType,\n [],\n (ctx) => (ctx.globals.accumulated === undefined ? null : ctx.globals.accumulated)\n ],\n '+': [\n NumberType,\n varargs(NumberType),\n (ctx, args) => {\n let result = 0;\n for (const arg of args) {\n result += arg.evaluate(ctx);\n }\n return result;\n }\n ],\n '*': [\n NumberType,\n varargs(NumberType),\n (ctx, args) => {\n let result = 1;\n for (const arg of args) {\n result *= arg.evaluate(ctx);\n }\n return result;\n }\n ],\n '-': {\n type: NumberType,\n overloads: [\n [[NumberType, NumberType], (ctx, [a, b]) => a.evaluate(ctx) - b.evaluate(ctx)],\n [[NumberType], (ctx, [a]) => -a.evaluate(ctx)]\n ]\n },\n '/': [NumberType, [NumberType, NumberType], (ctx, [a, b]) => a.evaluate(ctx) / b.evaluate(ctx)],\n '%': [NumberType, [NumberType, NumberType], (ctx, [a, b]) => a.evaluate(ctx) % b.evaluate(ctx)],\n ln2: [NumberType, [], () => Math.LN2],\n pi: [NumberType, [], () => Math.PI],\n e: [NumberType, [], () => Math.E],\n '^': [\n NumberType,\n [NumberType, NumberType],\n (ctx, [b, e]) => Math.pow(b.evaluate(ctx), e.evaluate(ctx))\n ],\n sqrt: [NumberType, [NumberType], (ctx, [x]) => Math.sqrt(x.evaluate(ctx))],\n log10: [NumberType, [NumberType], (ctx, [n]) => Math.log(n.evaluate(ctx)) / Math.LN10],\n ln: [NumberType, [NumberType], (ctx, [n]) => Math.log(n.evaluate(ctx))],\n log2: [NumberType, [NumberType], (ctx, [n]) => Math.log(n.evaluate(ctx)) / Math.LN2],\n sin: [NumberType, [NumberType], (ctx, [n]) => Math.sin(n.evaluate(ctx))],\n cos: [NumberType, [NumberType], (ctx, [n]) => Math.cos(n.evaluate(ctx))],\n tan: [NumberType, [NumberType], (ctx, [n]) => Math.tan(n.evaluate(ctx))],\n asin: [NumberType, [NumberType], (ctx, [n]) => Math.asin(n.evaluate(ctx))],\n acos: [NumberType, [NumberType], (ctx, [n]) => Math.acos(n.evaluate(ctx))],\n atan: [NumberType, [NumberType], (ctx, [n]) => Math.atan(n.evaluate(ctx))],\n min: [\n NumberType,\n varargs(NumberType),\n (ctx, args) => Math.min(...args.map((arg) => arg.evaluate(ctx)))\n ],\n max: [\n NumberType,\n varargs(NumberType),\n (ctx, args) => Math.max(...args.map((arg) => arg.evaluate(ctx)))\n ],\n abs: [NumberType, [NumberType], (ctx, [n]) => Math.abs(n.evaluate(ctx))],\n round: [\n NumberType,\n [NumberType],\n (ctx, [n]) => {\n const v = n.evaluate(ctx);\n // Javascript's Math.round() rounds towards +Infinity for halfway\n // values, even when they're negative. It's more common to round\n // away from 0 (e.g., this is what python and C++ do)\n return v < 0 ? -Math.round(-v) : Math.round(v);\n }\n ],\n floor: [NumberType, [NumberType], (ctx, [n]) => Math.floor(n.evaluate(ctx))],\n ceil: [NumberType, [NumberType], (ctx, [n]) => Math.ceil(n.evaluate(ctx))],\n 'filter-==': [\n BooleanType,\n [StringType, ValueType],\n (ctx, [k, v]) => ctx.properties()[k.value] === v.value\n ],\n 'filter-id-==': [BooleanType, [ValueType], (ctx, [v]) => ctx.id() === v.value],\n 'filter-type-==': [\n BooleanType,\n [StringType],\n (ctx, [v]) => ctx.geometryType() === v.value\n ],\n 'filter-<': [\n BooleanType,\n [StringType, ValueType],\n (ctx, [k, v]) => {\n const a = ctx.properties()[k.value];\n const b = v.value;\n return typeof a === typeof b && a < b;\n }\n ],\n 'filter-id-<': [\n BooleanType,\n [ValueType],\n (ctx, [v]) => {\n const a = ctx.id();\n const b = v.value;\n return typeof a === typeof b && a < b;\n }\n ],\n 'filter->': [\n BooleanType,\n [StringType, ValueType],\n (ctx, [k, v]) => {\n const a = ctx.properties()[k.value];\n const b = v.value;\n return typeof a === typeof b && a > b;\n }\n ],\n 'filter-id->': [\n BooleanType,\n [ValueType],\n (ctx, [v]) => {\n const a = ctx.id();\n const b = v.value;\n return typeof a === typeof b && a > b;\n }\n ],\n 'filter-<=': [\n BooleanType,\n [StringType, ValueType],\n (ctx, [k, v]) => {\n const a = ctx.properties()[k.value];\n const b = v.value;\n return typeof a === typeof b && a <= b;\n }\n ],\n 'filter-id-<=': [\n BooleanType,\n [ValueType],\n (ctx, [v]) => {\n const a = ctx.id();\n const b = v.value;\n return typeof a === typeof b && a <= b;\n }\n ],\n 'filter->=': [\n BooleanType,\n [StringType, ValueType],\n (ctx, [k, v]) => {\n const a = ctx.properties()[k.value];\n const b = v.value;\n return typeof a === typeof b && a >= b;\n }\n ],\n 'filter-id->=': [\n BooleanType,\n [ValueType],\n (ctx, [v]) => {\n const a = ctx.id();\n const b = v.value;\n return typeof a === typeof b && a >= b;\n }\n ],\n 'filter-has': [BooleanType, [ValueType], (ctx, [k]) => k.value in ctx.properties()],\n 'filter-has-id': [BooleanType, [], (ctx) => ctx.id() !== null && ctx.id() !== undefined],\n 'filter-type-in': [\n BooleanType,\n [array(StringType)],\n (ctx, [v]) => v.value.indexOf(ctx.geometryType()) >= 0\n ],\n 'filter-id-in': [\n BooleanType,\n [array(ValueType)],\n (ctx, [v]) => v.value.indexOf(ctx.id()) >= 0\n ],\n 'filter-in-small': [\n BooleanType,\n [StringType, array(ValueType)],\n // assumes v is an array literal\n (ctx, [k, v]) => v.value.indexOf(ctx.properties()[k.value]) >= 0\n ],\n 'filter-in-large': [\n BooleanType,\n [StringType, array(ValueType)],\n // assumes v is a array literal with values sorted in ascending order and of a single type\n (ctx, [k, v]) => binarySearch(ctx.properties()[k.value], v.value, 0, v.value.length - 1)\n ],\n all: {\n type: BooleanType,\n overloads: [\n [[BooleanType, BooleanType], (ctx, [a, b]) => a.evaluate(ctx) && b.evaluate(ctx)],\n [\n varargs(BooleanType),\n (ctx, args) => {\n for (const arg of args) {\n if (!arg.evaluate(ctx))\n return false;\n }\n return true;\n }\n ]\n ]\n },\n any: {\n type: BooleanType,\n overloads: [\n [[BooleanType, BooleanType], (ctx, [a, b]) => a.evaluate(ctx) || b.evaluate(ctx)],\n [\n varargs(BooleanType),\n (ctx, args) => {\n for (const arg of args) {\n if (arg.evaluate(ctx))\n return true;\n }\n return false;\n }\n ]\n ]\n },\n '!': [BooleanType, [BooleanType], (ctx, [b]) => !b.evaluate(ctx)],\n 'is-supported-script': [\n BooleanType,\n [StringType],\n // At parse time this will always return true, so we need to exclude this expression with isGlobalPropertyConstant\n (ctx, [s]) => {\n const isSupportedScript = ctx.globals && ctx.globals.isSupportedScript;\n if (isSupportedScript) {\n return isSupportedScript(s.evaluate(ctx));\n }\n return true;\n }\n ],\n upcase: [StringType, [StringType], (ctx, [s]) => s.evaluate(ctx).toUpperCase()],\n downcase: [StringType, [StringType], (ctx, [s]) => s.evaluate(ctx).toLowerCase()],\n concat: [\n StringType,\n varargs(ValueType),\n (ctx, args) => args.map((arg) => valueToString(arg.evaluate(ctx))).join('')\n ],\n split: [\n array(StringType),\n [StringType, StringType],\n (ctx, [s, delim]) => s.evaluate(ctx).split(delim.evaluate(ctx))\n ],\n join: [\n StringType,\n [array(StringType), StringType],\n (ctx, [arr, delim]) => arr.evaluate(ctx).join(delim.evaluate(ctx))\n ],\n 'resolved-locale': [\n StringType,\n [CollatorType],\n (ctx, [collator]) => collator.evaluate(ctx).resolvedLocale()\n ]\n});\nfunction stringifySignature(signature) {\n if (Array.isArray(signature)) {\n return `(${signature.map(typeToString).join(', ')})`;\n }\n else {\n return `(${typeToString(signature.type)}...)`;\n }\n}\nfunction isExpressionConstant(expression) {\n if (expression instanceof Var) {\n return isExpressionConstant(expression.boundExpression);\n }\n else if (expression instanceof CompoundExpression && expression.name === 'error') {\n return false;\n }\n else if (expression instanceof CollatorExpression) {\n // Although the results of a Collator expression with fixed arguments\n // generally shouldn't change between executions, we can't serialize them\n // as constant expressions because results change based on environment.\n return false;\n }\n else if (expression instanceof Within) {\n return false;\n }\n else if (expression instanceof Distance) {\n return false;\n }\n else if (expression instanceof GlobalState) {\n return false;\n }\n const isTypeAnnotation = expression instanceof Coercion || expression instanceof Assertion;\n let childrenConstant = true;\n expression.eachChild((child) => {\n // We can _almost_ assume that if `expressions` children are constant,\n // they would already have been evaluated to Literal values when they\n // were parsed. Type annotations are the exception, because they might\n // have been inferred and added after a child was parsed.\n // So we recurse into isConstant() for the children of type annotations,\n // but otherwise simply check whether they are Literals.\n if (isTypeAnnotation) {\n childrenConstant = childrenConstant && isExpressionConstant(child);\n }\n else {\n childrenConstant = childrenConstant && child instanceof Literal;\n }\n });\n if (!childrenConstant) {\n return false;\n }\n return (isFeatureConstant(expression) &&\n isGlobalPropertyConstant(expression, [\n 'zoom',\n 'heatmap-density',\n 'elevation',\n 'line-progress',\n 'accumulated',\n 'is-supported-script'\n ]));\n}\nfunction isFeatureConstant(e) {\n if (e instanceof CompoundExpression) {\n if (e.name === 'get' && e.args.length === 1) {\n return false;\n }\n else if (e.name === 'feature-state') {\n return false;\n }\n else if (e.name === 'has' && e.args.length === 1) {\n return false;\n }\n else if (e.name === 'properties' || e.name === 'geometry-type' || e.name === 'id') {\n return false;\n }\n else if (/^filter-/.test(e.name)) {\n return false;\n }\n }\n if (e instanceof Within) {\n return false;\n }\n if (e instanceof Distance) {\n return false;\n }\n let result = true;\n e.eachChild((arg) => {\n if (result && !isFeatureConstant(arg)) {\n result = false;\n }\n });\n return result;\n}\nfunction isStateConstant(e) {\n if (e instanceof CompoundExpression) {\n if (e.name === 'feature-state') {\n return false;\n }\n }\n let result = true;\n e.eachChild((arg) => {\n if (result && !isStateConstant(arg)) {\n result = false;\n }\n });\n return result;\n}\nfunction isGlobalPropertyConstant(e, properties) {\n if (e instanceof CompoundExpression && properties.indexOf(e.name) >= 0) {\n return false;\n }\n let result = true;\n e.eachChild((arg) => {\n if (result && !isGlobalPropertyConstant(arg, properties)) {\n result = false;\n }\n });\n return result;\n}\n\nfunction success(value) {\n return { result: 'success', value };\n}\nfunction error(value) {\n return { result: 'error', value };\n}\n\nfunction supportsPropertyExpression(spec) {\n return (spec['property-type'] === 'data-driven' ||\n spec['property-type'] === 'cross-faded-data-driven');\n}\nfunction supportsZoomExpression(spec) {\n return !!spec.expression && spec.expression.parameters.indexOf('zoom') > -1;\n}\nfunction supportsInterpolation(spec) {\n return !!spec.expression && spec.expression.interpolated;\n}\n\nfunction getType(val) {\n if (val instanceof Number) {\n return 'number';\n }\n else if (val instanceof String) {\n return 'string';\n }\n else if (val instanceof Boolean) {\n return 'boolean';\n }\n else if (Array.isArray(val)) {\n return 'array';\n }\n else if (val === null) {\n return 'null';\n }\n else {\n return typeof val;\n }\n}\n\nfunction isFunction$1(value) {\n return (typeof value === 'object' &&\n value !== null &&\n !Array.isArray(value) &&\n typeOf(value) === ObjectType);\n}\nfunction identityFunction(x) {\n return x;\n}\nfunction getParseFunction(propertySpec) {\n switch (propertySpec.type) {\n case 'color':\n return Color.parse;\n case 'padding':\n return Padding.parse;\n case 'numberArray':\n return NumberArray.parse;\n case 'colorArray':\n return ColorArray.parse;\n default:\n return null;\n }\n}\nfunction getInnerFunction(type) {\n switch (type) {\n case 'exponential':\n return evaluateExponentialFunction;\n case 'interval':\n return evaluateIntervalFunction;\n case 'categorical':\n return evaluateCategoricalFunction;\n case 'identity':\n return evaluateIdentityFunction;\n default:\n throw new Error(`Unknown function type \"${type}\"`);\n }\n}\nfunction createFunction(parameters, propertySpec) {\n const zoomAndFeatureDependent = parameters.stops && typeof parameters.stops[0][0] === 'object';\n const featureDependent = zoomAndFeatureDependent || parameters.property !== undefined;\n const zoomDependent = zoomAndFeatureDependent || !featureDependent;\n const type = parameters.type || (supportsInterpolation(propertySpec) ? 'exponential' : 'interval');\n const parseFn = getParseFunction(propertySpec);\n if (parseFn) {\n parameters = extendBy({}, parameters);\n if (parameters.stops) {\n parameters.stops = parameters.stops.map((stop) => {\n return [stop[0], parseFn(stop[1])];\n });\n }\n if (parameters.default) {\n parameters.default = parseFn(parameters.default);\n }\n else {\n parameters.default = parseFn(propertySpec.default);\n }\n }\n if (parameters.colorSpace && !isSupportedInterpolationColorSpace(parameters.colorSpace)) {\n throw new Error(`Unknown color space: \"${parameters.colorSpace}\"`);\n }\n const innerFun = getInnerFunction(type);\n let hashedStops;\n let categoricalKeyType;\n if (type === 'categorical') {\n // For categorical functions, generate an Object as a hashmap of the stops for fast searching\n hashedStops = Object.create(null);\n for (const stop of parameters.stops) {\n hashedStops[stop[0]] = stop[1];\n }\n // Infer key type based on first stop key-- used to encforce strict type checking later\n categoricalKeyType = typeof parameters.stops[0][0];\n }\n if (zoomAndFeatureDependent) {\n const featureFunctions = {};\n const zoomStops = [];\n for (let s = 0; s < parameters.stops.length; s++) {\n const stop = parameters.stops[s];\n const zoom = stop[0].zoom;\n if (featureFunctions[zoom] === undefined) {\n featureFunctions[zoom] = {\n zoom,\n type: parameters.type,\n property: parameters.property,\n default: parameters.default,\n stops: []\n };\n zoomStops.push(zoom);\n }\n featureFunctions[zoom].stops.push([stop[0].value, stop[1]]);\n }\n const featureFunctionStops = [];\n for (const z of zoomStops) {\n featureFunctionStops.push([\n featureFunctions[z].zoom,\n createFunction(featureFunctions[z], propertySpec)\n ]);\n }\n const interpolationType = { name: 'linear' };\n return {\n kind: 'composite',\n interpolationType,\n interpolationFactor: Interpolate.interpolationFactor.bind(undefined, interpolationType),\n zoomStops: featureFunctionStops.map((s) => s[0]),\n evaluate({ zoom }, properties) {\n return evaluateExponentialFunction({\n stops: featureFunctionStops,\n base: parameters.base\n }, propertySpec, zoom).evaluate(zoom, properties);\n }\n };\n }\n else if (zoomDependent) {\n const interpolationType = type === 'exponential'\n ? { name: 'exponential', base: parameters.base !== undefined ? parameters.base : 1 }\n : null;\n return {\n kind: 'camera',\n interpolationType,\n interpolationFactor: Interpolate.interpolationFactor.bind(undefined, interpolationType),\n zoomStops: parameters.stops.map((s) => s[0]),\n evaluate: ({ zoom }) => innerFun(parameters, propertySpec, zoom, hashedStops, categoricalKeyType)\n };\n }\n else {\n return {\n kind: 'source',\n evaluate(_, feature) {\n const value = feature && feature.properties\n ? feature.properties[parameters.property]\n : undefined;\n if (value === undefined) {\n return coalesce$1(parameters.default, propertySpec.default);\n }\n return innerFun(parameters, propertySpec, value, hashedStops, categoricalKeyType);\n }\n };\n }\n}\nfunction coalesce$1(a, b, c) {\n if (a !== undefined)\n return a;\n if (b !== undefined)\n return b;\n if (c !== undefined)\n return c;\n}\nfunction evaluateCategoricalFunction(parameters, propertySpec, input, hashedStops, keyType) {\n const evaluated = typeof input === keyType ? hashedStops[input] : undefined; // Enforce strict typing on input\n return coalesce$1(evaluated, parameters.default, propertySpec.default);\n}\nfunction evaluateIntervalFunction(parameters, propertySpec, input) {\n // Edge cases\n if (getType(input) !== 'number')\n return coalesce$1(parameters.default, propertySpec.default);\n const n = parameters.stops.length;\n if (n === 1)\n return parameters.stops[0][1];\n if (input <= parameters.stops[0][0])\n return parameters.stops[0][1];\n if (input >= parameters.stops[n - 1][0])\n return parameters.stops[n - 1][1];\n const index = findStopLessThanOrEqualTo(parameters.stops.map((stop) => stop[0]), input);\n return parameters.stops[index][1];\n}\nfunction evaluateExponentialFunction(parameters, propertySpec, input) {\n const base = parameters.base !== undefined ? parameters.base : 1;\n // Edge cases\n if (getType(input) !== 'number')\n return coalesce$1(parameters.default, propertySpec.default);\n const n = parameters.stops.length;\n if (n === 1)\n return parameters.stops[0][1];\n if (input <= parameters.stops[0][0])\n return parameters.stops[0][1];\n if (input >= parameters.stops[n - 1][0])\n return parameters.stops[n - 1][1];\n const index = findStopLessThanOrEqualTo(parameters.stops.map((stop) => stop[0]), input);\n const t = interpolationFactor(input, base, parameters.stops[index][0], parameters.stops[index + 1][0]);\n const outputLower = parameters.stops[index][1];\n const outputUpper = parameters.stops[index + 1][1];\n const interp = interpolateFactory[propertySpec.type] || identityFunction;\n if (typeof outputLower.evaluate === 'function') {\n return {\n evaluate(...args) {\n const evaluatedLower = outputLower.evaluate.apply(undefined, args);\n const evaluatedUpper = outputUpper.evaluate.apply(undefined, args);\n // Special case for fill-outline-color, which has no spec default.\n if (evaluatedLower === undefined || evaluatedUpper === undefined) {\n return undefined;\n }\n return interp(evaluatedLower, evaluatedUpper, t, parameters.colorSpace);\n }\n };\n }\n return interp(outputLower, outputUpper, t, parameters.colorSpace);\n}\nfunction evaluateIdentityFunction(parameters, propertySpec, input) {\n switch (propertySpec.type) {\n case 'color':\n input = Color.parse(input);\n break;\n case 'formatted':\n input = Formatted.fromString(input.toString());\n break;\n case 'resolvedImage':\n input = ResolvedImage.fromString(input.toString());\n break;\n case 'padding':\n input = Padding.parse(input);\n break;\n case 'colorArray':\n input = ColorArray.parse(input);\n break;\n case 'numberArray':\n input = NumberArray.parse(input);\n break;\n default:\n if (getType(input) !== propertySpec.type &&\n (propertySpec.type !== 'enum' || !propertySpec.values[input])) {\n input = undefined;\n }\n }\n return coalesce$1(input, parameters.default, propertySpec.default);\n}\n/**\n * Returns a ratio that can be used to interpolate between exponential function\n * stops.\n *\n * How it works:\n * Two consecutive stop values define a (scaled and shifted) exponential\n * function `f(x) = a * base^x + b`, where `base` is the user-specified base,\n * and `a` and `b` are constants affording sufficient degrees of freedom to fit\n * the function to the given stops.\n *\n * Here's a bit of algebra that lets us compute `f(x)` directly from the stop\n * values without explicitly solving for `a` and `b`:\n *\n * First stop value: `f(x0) = y0 = a * base^x0 + b`\n * Second stop value: `f(x1) = y1 = a * base^x1 + b`\n * => `y1 - y0 = a(base^x1 - base^x0)`\n * => `a = (y1 - y0)/(base^x1 - base^x0)`\n *\n * Desired value: `f(x) = y = a * base^x + b`\n * => `f(x) = y0 + a * (base^x - base^x0)`\n *\n * From the above, we can replace the `a` in `a * (base^x - base^x0)` and do a\n * little algebra:\n * ```\n * a * (base^x - base^x0) = (y1 - y0)/(base^x1 - base^x0) * (base^x - base^x0)\n * = (y1 - y0) * (base^x - base^x0) / (base^x1 - base^x0)\n * ```\n *\n * If we let `(base^x - base^x0) / (base^x1 base^x0)`, then we have\n * `f(x) = y0 + (y1 - y0) * ratio`. In other words, `ratio` may be treated as\n * an interpolation factor between the two stops' output values.\n *\n * (Note: a slightly different form for `ratio`,\n * `(base^(x-x0) - 1) / (base^(x1-x0) - 1) `, is equivalent, but requires fewer\n * expensive `Math.pow()` operations.)\n *\n * @private\n */\nfunction interpolationFactor(input, base, lowerValue, upperValue) {\n const difference = upperValue - lowerValue;\n const progress = input - lowerValue;\n if (difference === 0) {\n return 0;\n }\n else if (base === 1) {\n return progress / difference;\n }\n else {\n return (Math.pow(base, progress) - 1) / (Math.pow(base, difference) - 1);\n }\n}\n\nclass StyleExpression {\n constructor(expression, propertySpec, globalState) {\n this.expression = expression;\n this._warningHistory = {};\n this._evaluator = new EvaluationContext();\n this._defaultValue = propertySpec ? getDefaultValue(propertySpec) : null;\n this._enumValues =\n propertySpec && propertySpec.type === 'enum' ? propertySpec.values : null;\n this._globalState = globalState;\n }\n evaluateWithoutErrorHandling(globals, feature, featureState, canonical, availableImages, formattedSection) {\n if (this._globalState) {\n globals = addGlobalState(globals, this._globalState);\n }\n this._evaluator.globals = globals;\n this._evaluator.feature = feature;\n this._evaluator.featureState = featureState;\n this._evaluator.canonical = canonical;\n this._evaluator.availableImages = availableImages || null;\n this._evaluator.formattedSection = formattedSection;\n return this.expression.evaluate(this._evaluator);\n }\n evaluate(globals, feature, featureState, canonical, availableImages, formattedSection) {\n if (this._globalState) {\n globals = addGlobalState(globals, this._globalState);\n }\n this._evaluator.globals = globals;\n this._evaluator.feature = feature || null;\n this._evaluator.featureState = featureState || null;\n this._evaluator.canonical = canonical;\n this._evaluator.availableImages = availableImages || null;\n this._evaluator.formattedSection = formattedSection || null;\n try {\n const val = this.expression.evaluate(this._evaluator);\n if (val === null || val === undefined || (typeof val === 'number' && val !== val)) {\n return this._defaultValue;\n }\n if (this._enumValues && !(val in this._enumValues)) {\n throw new RuntimeError(`Expected value to be one of ${Object.keys(this._enumValues)\n .map((v) => JSON.stringify(v))\n .join(', ')}, but found ${JSON.stringify(val)} instead.`);\n }\n return val;\n }\n catch (e) {\n if (!this._warningHistory[e.message]) {\n this._warningHistory[e.message] = true;\n if (typeof console !== 'undefined') {\n console.warn(e.message);\n }\n }\n return this._defaultValue;\n }\n }\n}\nfunction isExpression(expression) {\n return (Array.isArray(expression) &&\n expression.length > 0 &&\n typeof expression[0] === 'string' &&\n expression[0] in expressions$1);\n}\n/**\n * Parse and typecheck the given style spec JSON expression. If\n * options.defaultValue is provided, then the resulting StyleExpression's\n * `evaluate()` method will handle errors by logging a warning (once per\n * message) and returning the default value. Otherwise, it will throw\n * evaluation errors.\n *\n * @private\n */\nfunction createExpression(expression, propertySpec, globalState) {\n const parser = new ParsingContext(expressions$1, isExpressionConstant, [], propertySpec ? getExpectedType(propertySpec) : undefined);\n // For string-valued properties, coerce to string at the top level rather than asserting.\n const parsed = parser.parse(expression, undefined, undefined, undefined, propertySpec && propertySpec.type === 'string' ? { typeAnnotation: 'coerce' } : undefined);\n if (!parsed) {\n return error(parser.errors);\n }\n return success(new StyleExpression(parsed, propertySpec, globalState));\n}\nclass ZoomConstantExpression {\n constructor(kind, expression, globalState) {\n this.kind = kind;\n this._styleExpression = expression;\n this.isStateDependent =\n kind !== 'constant' && !isStateConstant(expression.expression);\n this.globalStateRefs = findGlobalStateRefs(expression.expression);\n this._globalState = globalState;\n }\n evaluateWithoutErrorHandling(globals, feature, featureState, canonical, availableImages, formattedSection) {\n if (this._globalState) {\n globals = addGlobalState(globals, this._globalState);\n }\n return this._styleExpression.evaluateWithoutErrorHandling(globals, feature, featureState, canonical, availableImages, formattedSection);\n }\n evaluate(globals, feature, featureState, canonical, availableImages, formattedSection) {\n if (this._globalState) {\n globals = addGlobalState(globals, this._globalState);\n }\n return this._styleExpression.evaluate(globals, feature, featureState, canonical, availableImages, formattedSection);\n }\n}\nclass ZoomDependentExpression {\n constructor(kind, expression, zoomStops, interpolationType, globalState) {\n this.kind = kind;\n this.zoomStops = zoomStops;\n this._styleExpression = expression;\n this.isStateDependent =\n kind !== 'camera' && !isStateConstant(expression.expression);\n this.globalStateRefs = findGlobalStateRefs(expression.expression);\n this.interpolationType = interpolationType;\n this._globalState = globalState;\n }\n evaluateWithoutErrorHandling(globals, feature, featureState, canonical, availableImages, formattedSection) {\n if (this._globalState) {\n globals = addGlobalState(globals, this._globalState);\n }\n return this._styleExpression.evaluateWithoutErrorHandling(globals, feature, featureState, canonical, availableImages, formattedSection);\n }\n evaluate(globals, feature, featureState, canonical, availableImages, formattedSection) {\n if (this._globalState) {\n globals = addGlobalState(globals, this._globalState);\n }\n return this._styleExpression.evaluate(globals, feature, featureState, canonical, availableImages, formattedSection);\n }\n interpolationFactor(input, lower, upper) {\n if (this.interpolationType) {\n return Interpolate.interpolationFactor(this.interpolationType, input, lower, upper);\n }\n else {\n return 0;\n }\n }\n}\nfunction isZoomExpression(expression) {\n return expression._styleExpression !== undefined;\n}\nfunction createPropertyExpression(expressionInput, propertySpec, globalState) {\n const expression = createExpression(expressionInput, propertySpec, globalState);\n if (expression.result === 'error') {\n return expression;\n }\n const parsed = expression.value.expression;\n const isFeatureConstantResult = isFeatureConstant(parsed);\n if (!isFeatureConstantResult && !supportsPropertyExpression(propertySpec)) {\n return error([new ExpressionParsingError('', 'data expressions not supported')]);\n }\n const isZoomConstant = isGlobalPropertyConstant(parsed, ['zoom']);\n if (!isZoomConstant && !supportsZoomExpression(propertySpec)) {\n return error([new ExpressionParsingError('', 'zoom expressions not supported')]);\n }\n const zoomCurve = findZoomCurve(parsed);\n if (!zoomCurve && !isZoomConstant) {\n return error([\n new ExpressionParsingError('', '\"zoom\" expression may only be used as input to a top-level \"step\" or \"interpolate\" expression.')\n ]);\n }\n else if (zoomCurve instanceof ExpressionParsingError) {\n return error([zoomCurve]);\n }\n else if (zoomCurve instanceof Interpolate && !supportsInterpolation(propertySpec)) {\n return error([\n new ExpressionParsingError('', '\"interpolate\" expressions cannot be used with this property')\n ]);\n }\n if (!zoomCurve) {\n return success(isFeatureConstantResult\n ? new ZoomConstantExpression('constant', expression.value, globalState)\n : new ZoomConstantExpression('source', expression.value, globalState));\n }\n const interpolationType = zoomCurve instanceof Interpolate ? zoomCurve.interpolation : undefined;\n return success(isFeatureConstantResult\n ? new ZoomDependentExpression('camera', expression.value, zoomCurve.labels, interpolationType, globalState)\n : new ZoomDependentExpression('composite', expression.value, zoomCurve.labels, interpolationType, globalState));\n}\n// serialization wrapper for old-style stop functions normalized to the\n// expression interface\nclass StylePropertyFunction {\n constructor(parameters, specification) {\n this._parameters = parameters;\n this._specification = specification;\n extendBy(this, createFunction(this._parameters, this._specification));\n }\n static deserialize(serialized) {\n return new StylePropertyFunction(serialized._parameters, serialized._specification);\n }\n static serialize(input) {\n return {\n _parameters: input._parameters,\n _specification: input._specification\n };\n }\n}\nfunction normalizePropertyExpression(value, specification, globalState) {\n if (isFunction$1(value)) {\n return new StylePropertyFunction(value, specification);\n }\n else if (isExpression(value)) {\n const expression = createPropertyExpression(value, specification, globalState);\n if (expression.result === 'error') {\n // this should have been caught in validation\n throw new Error(expression.value.map((err) => `${err.key}: ${err.message}`).join(', '));\n }\n return expression.value;\n }\n else {\n let constant = value;\n if (specification.type === 'color' && typeof value === 'string') {\n constant = Color.parse(value);\n }\n else if (specification.type === 'padding' &&\n (typeof value === 'number' || Array.isArray(value))) {\n constant = Padding.parse(value);\n }\n else if (specification.type === 'numberArray' &&\n (typeof value === 'number' || Array.isArray(value))) {\n constant = NumberArray.parse(value);\n }\n else if (specification.type === 'colorArray' &&\n (typeof value === 'string' || Array.isArray(value))) {\n constant = ColorArray.parse(value);\n }\n else if (specification.type === 'variableAnchorOffsetCollection' &&\n Array.isArray(value)) {\n constant = VariableAnchorOffsetCollection.parse(value);\n }\n else if (specification.type === 'projectionDefinition' && typeof value === 'string') {\n constant = ProjectionDefinition.parse(value);\n }\n return {\n globalStateRefs: new Set(),\n _globalState: null,\n kind: 'constant',\n evaluate: () => constant\n };\n }\n}\n// Zoom-dependent expressions may only use [\"zoom\"] as the input to a top-level \"step\" or \"interpolate\"\n// expression (collectively referred to as a \"curve\"). The curve may be wrapped in one or more \"let\" or\n// \"coalesce\" expressions.\nfunction findZoomCurve(expression) {\n let result = null;\n if (expression instanceof Let) {\n result = findZoomCurve(expression.result);\n }\n else if (expression instanceof Coalesce) {\n for (const arg of expression.args) {\n result = findZoomCurve(arg);\n if (result) {\n break;\n }\n }\n }\n else if ((expression instanceof Step || expression instanceof Interpolate) &&\n expression.input instanceof CompoundExpression &&\n expression.input.name === 'zoom') {\n result = expression;\n }\n if (result instanceof ExpressionParsingError) {\n return result;\n }\n expression.eachChild((child) => {\n const childResult = findZoomCurve(child);\n if (childResult instanceof ExpressionParsingError) {\n result = childResult;\n }\n else if (!result && childResult) {\n result = new ExpressionParsingError('', '\"zoom\" expression may only be used as input to a top-level \"step\" or \"interpolate\" expression.');\n }\n else if (result && childResult && result !== childResult) {\n result = new ExpressionParsingError('', 'Only one zoom-based \"step\" or \"interpolate\" subexpression may be used in an expression.');\n }\n });\n return result;\n}\nfunction findGlobalStateRefs(expression, results = new Set()) {\n if (expression instanceof GlobalState) {\n results.add(expression.key);\n }\n expression.eachChild((childExpression) => {\n findGlobalStateRefs(childExpression, results);\n });\n return results;\n}\nfunction getExpectedType(spec) {\n const types = {\n color: ColorType,\n string: StringType,\n number: NumberType,\n enum: StringType,\n boolean: BooleanType,\n formatted: FormattedType,\n padding: PaddingType,\n numberArray: NumberArrayType,\n colorArray: ColorArrayType,\n projectionDefinition: ProjectionDefinitionType,\n resolvedImage: ResolvedImageType,\n variableAnchorOffsetCollection: VariableAnchorOffsetCollectionType\n };\n if (spec.type === 'array') {\n return array(types[spec.value] || ValueType, spec.length);\n }\n return types[spec.type];\n}\nfunction getDefaultValue(spec) {\n if (spec.type === 'color' && isFunction$1(spec.default)) {\n // Special case for heatmap-color: it uses the 'default:' to define a\n // default color ramp, but createExpression expects a simple value to fall\n // back to in case of runtime errors\n return new Color(0, 0, 0, 0);\n }\n switch (spec.type) {\n case 'color':\n return Color.parse(spec.default) || null;\n case 'padding':\n return Padding.parse(spec.default) || null;\n case 'numberArray':\n return NumberArray.parse(spec.default) || null;\n case 'colorArray':\n return ColorArray.parse(spec.default) || null;\n case 'variableAnchorOffsetCollection':\n return VariableAnchorOffsetCollection.parse(spec.default) || null;\n case 'projectionDefinition':\n return ProjectionDefinition.parse(spec.default) || null;\n default:\n return spec.default === undefined ? null : spec.default;\n }\n}\nfunction addGlobalState(globals, globalState) {\n const { zoom, heatmapDensity, elevation, lineProgress, isSupportedScript, accumulated } = globals !== null && globals !== void 0 ? globals : {};\n return {\n zoom,\n heatmapDensity,\n elevation,\n lineProgress,\n isSupportedScript,\n accumulated,\n globalState\n };\n}\n\nfunction isExpressionFilter(filter) {\n if (filter === true || filter === false) {\n return true;\n }\n if (!Array.isArray(filter) || filter.length === 0) {\n return false;\n }\n switch (filter[0]) {\n case 'has':\n return filter.length >= 2 && filter[1] !== '$id' && filter[1] !== '$type';\n case 'in':\n return (filter.length >= 3 && (typeof filter[1] !== 'string' || Array.isArray(filter[2])));\n case '!in':\n case '!has':\n case 'none':\n return false;\n case '==':\n case '!=':\n case '>':\n case '>=':\n case '<':\n case '<=':\n return filter.length !== 3 || Array.isArray(filter[1]) || Array.isArray(filter[2]);\n case 'any':\n case 'all':\n for (const f of filter.slice(1)) {\n if (!isExpressionFilter(f) && typeof f !== 'boolean') {\n return false;\n }\n }\n return true;\n default:\n return true;\n }\n}\nconst filterSpec = {\n type: 'boolean',\n default: false,\n transition: false,\n 'property-type': 'data-driven',\n expression: {\n interpolated: false,\n parameters: ['zoom', 'feature']\n }\n};\n/**\n * Given a filter expressed as nested arrays, return a new function\n * that evaluates whether a given feature (with a .properties or .tags property)\n * passes its test.\n *\n * @private\n * @param filter MapLibre filter\n * @param [globalState] Global state object to be used for evaluating 'global-state' expressions\n * @returns filter-evaluating function\n */\nfunction featureFilter(filter, globalState) {\n if (filter === null || filter === undefined) {\n return { filter: () => true, needGeometry: false, getGlobalStateRefs: () => new Set() };\n }\n if (!isExpressionFilter(filter)) {\n filter = convertFilter$1(filter);\n }\n const compiled = createExpression(filter, filterSpec, globalState);\n if (compiled.result === 'error') {\n throw new Error(compiled.value.map((err) => `${err.key}: ${err.message}`).join(', '));\n }\n else {\n const needGeometry = geometryNeeded(filter);\n return {\n filter: (globalProperties, feature, canonical) => compiled.value.evaluate(globalProperties, feature, {}, canonical),\n needGeometry,\n getGlobalStateRefs: () => findGlobalStateRefs(compiled.value.expression)\n };\n }\n}\n// Comparison function to sort numbers and strings\nfunction compare(a, b) {\n return a < b ? -1 : a > b ? 1 : 0;\n}\nfunction geometryNeeded(filter) {\n if (!Array.isArray(filter))\n return false;\n if (filter[0] === 'within' || filter[0] === 'distance')\n return true;\n for (let index = 1; index < filter.length; index++) {\n if (geometryNeeded(filter[index]))\n return true;\n }\n return false;\n}\nfunction convertFilter$1(filter) {\n if (!filter)\n return true;\n const op = filter[0];\n if (filter.length <= 1)\n return op !== 'any';\n const converted = op === '=='\n ? convertComparisonOp$1(filter[1], filter[2], '==')\n : op === '!='\n ? convertNegation(convertComparisonOp$1(filter[1], filter[2], '=='))\n : op === '<' || op === '>' || op === '<=' || op === '>='\n ? convertComparisonOp$1(filter[1], filter[2], op)\n : op === 'any'\n ? convertDisjunctionOp(filter.slice(1))\n : op === 'all'\n ? ['all'].concat(filter.slice(1).map(convertFilter$1))\n : op === 'none'\n ? ['all'].concat(filter.slice(1).map(convertFilter$1).map(convertNegation))\n : op === 'in'\n ? convertInOp$1(filter[1], filter.slice(2))\n : op === '!in'\n ? convertNegation(convertInOp$1(filter[1], filter.slice(2)))\n : op === 'has'\n ? convertHasOp$1(filter[1])\n : op === '!has'\n ? convertNegation(convertHasOp$1(filter[1]))\n : true;\n return converted;\n}\nfunction convertComparisonOp$1(property, value, op) {\n switch (property) {\n case '$type':\n return [`filter-type-${op}`, value];\n case '$id':\n return [`filter-id-${op}`, value];\n default:\n return [`filter-${op}`, property, value];\n }\n}\nfunction convertDisjunctionOp(filters) {\n return ['any'].concat(filters.map(convertFilter$1));\n}\nfunction convertInOp$1(property, values) {\n if (values.length === 0) {\n return false;\n }\n switch (property) {\n case '$type':\n return ['filter-type-in', ['literal', values]];\n case '$id':\n return ['filter-id-in', ['literal', values]];\n default:\n if (values.length > 200 && !values.some((v) => typeof v !== typeof values[0])) {\n return ['filter-in-large', property, ['literal', values.sort(compare)]];\n }\n else {\n return ['filter-in-small', property, ['literal', values]];\n }\n }\n}\nfunction convertHasOp$1(property) {\n switch (property) {\n case '$type':\n return true;\n case '$id':\n return ['filter-has-id'];\n default:\n return ['filter-has', property];\n }\n}\nfunction convertNegation(filter) {\n return ['!', filter];\n}\n\n/*\n * Convert the given filter to an expression, storing the expected types for\n * any feature properties referenced in expectedTypes.\n *\n * These expected types are needed in order to construct preflight type checks\n * needed for handling 'any' filters. A preflight type check is necessary in\n * order to mimic legacy filters' semantics around expected type mismatches.\n * For example, consider the legacy filter:\n *\n * [\"any\", [\"all\", [\">\", \"y\", 0], [\">\", \"y\", 0]], [\">\", \"x\", 0]]\n *\n * Naively, we might convert this to the expression:\n *\n * [\"any\", [\"all\", [\">\", [\"get\", \"y\"], 0], [\">\", [\"get\", \"z\"], 0]], [\">\", [\"get\", \"x\"], 0]]\n *\n * But if we tried to evaluate this against, say `{x: 1, y: null, z: 0}`, the\n * [\">\", [\"get\", \"y\"], 0] would cause an evaluation error, leading to the\n * entire filter returning false. Legacy filter semantics, though, ask for\n * [\">\", \"y\", 0] to simply return `false` when `y` is of the wrong type,\n * allowing the subsequent terms of the outer \"any\" expression to be evaluated\n * (resulting, in this case, in a `true` value, because x > 0).\n *\n * We account for this by inserting a preflight type-checking expression before\n * each \"any\" term, allowing us to avoid evaluating the actual converted filter\n * if any type mismatches would cause it to produce an evaluation error:\n *\n * [\"any\",\n * [\"case\",\n * [\"all\", [\"==\", [\"typeof\", [\"get\", \"y\"]], \"number\"], [\"==\", [\"typeof\", [\"get\", \"z\"], \"number]],\n * [\"all\", [\">\", [\"get\", \"y\"], 0], [\">\", [\"get\", \"z\"], 0]],\n * false\n * ],\n * [\"case\",\n * [\"==\", [\"typeof\", [\"get\", \"x\"], \"number\"]],\n * [\">\", [\"get\", \"x\"], 0],\n * false\n * ]\n * ]\n *\n * An alternative, possibly more direct approach would be to use type checks\n * in the conversion of each comparison operator, so that the converted version\n * of each individual ==, >=, etc. would mimic the legacy filter semantics. The\n * downside of this approach is that it can lead to many more type checks than\n * would otherwise be necessary: outside the context of an \"any\" expression,\n * bailing out due to a runtime type error (expression semantics) and returning\n * false (legacy filter semantics) are equivalent: they cause the filter to\n * produce a `false` result.\n */\nfunction convertFilter(filter, expectedTypes = {}) {\n if (isExpressionFilter(filter))\n return filter;\n if (!filter)\n return true;\n const legacyFilter = filter;\n const legacyOp = legacyFilter[0];\n if (filter.length <= 1)\n return legacyOp !== 'any';\n switch (legacyOp) {\n case '==':\n case '!=':\n case '<':\n case '>':\n case '<=':\n case '>=': {\n const [, property, value] = filter;\n return convertComparisonOp(property, value, legacyOp, expectedTypes);\n }\n case 'any': {\n const [, ...conditions] = legacyFilter;\n const children = conditions.map((f) => {\n const types = {};\n const child = convertFilter(f, types);\n const typechecks = runtimeTypeChecks(types);\n return typechecks === true\n ? child\n : ['case', typechecks, child, false];\n });\n return ['any', ...children];\n }\n case 'all': {\n const [, ...conditions] = legacyFilter;\n const children = conditions.map((f) => convertFilter(f, expectedTypes));\n return children.length > 1 ? ['all', ...children] : children[0];\n }\n case 'none': {\n const [, ...conditions] = legacyFilter;\n return ['!', convertFilter(['any', ...conditions], {})];\n }\n case 'in': {\n const [, property, ...values] = legacyFilter;\n return convertInOp(property, values);\n }\n case '!in': {\n const [, property, ...values] = legacyFilter;\n return convertInOp(property, values, true);\n }\n case 'has':\n return convertHasOp(legacyFilter[1]);\n case '!has':\n return ['!', convertHasOp(legacyFilter[1])];\n default:\n return true;\n }\n}\n// Given a set of feature properties and an expected type for each one,\n// construct an boolean expression that tests whether each property has the\n// right type.\n// E.g.: for {name: 'string', population: 'number'}, return\n// [ 'all',\n// ['==', ['typeof', ['get', 'name'], 'string']],\n// ['==', ['typeof', ['get', 'population'], 'number]]\n// ]\nfunction runtimeTypeChecks(expectedTypes) {\n const conditions = [];\n for (const property in expectedTypes) {\n const get = property === '$id' ? ['id'] : ['get', property];\n conditions.push(['==', ['typeof', get], expectedTypes[property]]);\n }\n if (conditions.length === 0)\n return true;\n if (conditions.length === 1)\n return conditions[0];\n return ['all', ...conditions];\n}\nfunction convertComparisonOp(property, value, op, expectedTypes) {\n let get;\n if (property === '$type') {\n return [op, ['geometry-type'], value];\n }\n else if (property === '$id') {\n get = ['id'];\n }\n else {\n get = ['get', property];\n }\n if (expectedTypes && value !== null) {\n const type = typeof value;\n expectedTypes[property] = type;\n }\n if (op === '==' && property !== '$id' && value === null) {\n return [\n 'all',\n ['has', property], // missing property != null for legacy filters\n ['==', get, null]\n ];\n }\n else if (op === '!=' && property !== '$id' && value === null) {\n return [\n 'any',\n ['!', ['has', property]], // missing property != null for legacy filters\n ['!=', get, null]\n ];\n }\n return [op, get, value];\n}\nfunction convertInOp(property, values, negate = false) {\n if (values.length === 0)\n return negate;\n let get;\n if (property === '$type') {\n get = ['geometry-type'];\n }\n else if (property === '$id') {\n get = ['id'];\n }\n else {\n get = ['get', property];\n }\n // Determine if the list of values to be searched is homogenously typed.\n // If so (and if the type is string or number), then we can use a\n // [match, input, [...values], true, false] construction rather than a\n // bunch of `==` tests.\n let uniformTypes = true;\n const type = typeof values[0];\n for (const value of values) {\n if (typeof value !== type) {\n uniformTypes = false;\n break;\n }\n }\n if (uniformTypes && (type === 'string' || type === 'number')) {\n // Match expressions must have unique values.\n const uniqueValues = values.sort().filter((v, i) => i === 0 || values[i - 1] !== v);\n return ['match', get, uniqueValues, !negate, negate];\n }\n if (negate) {\n return ['all', ...values.map((v) => ['!=', get, v])];\n }\n else {\n return ['any', ...values.map((v) => ['==', get, v])];\n }\n}\nfunction convertHasOp(property) {\n if (property === '$type') {\n return true;\n }\n else if (property === '$id') {\n return ['!=', ['id'], null];\n }\n else {\n return ['has', property];\n }\n}\n\nfunction convertLiteral(value) {\n return typeof value === 'object' ? ['literal', value] : value;\n}\nfunction convertFunction(parameters, propertySpec) {\n let stops = parameters.stops;\n if (!stops) {\n // identity function\n return convertIdentityFunction(parameters, propertySpec);\n }\n const zoomAndFeatureDependent = stops && typeof stops[0][0] === 'object';\n const featureDependent = zoomAndFeatureDependent || parameters.property !== undefined;\n const zoomDependent = zoomAndFeatureDependent || !featureDependent;\n stops = stops.map((stop) => {\n if (!featureDependent && propertySpec.tokens && typeof stop[1] === 'string') {\n return [stop[0], convertTokenString(stop[1])];\n }\n return [stop[0], convertLiteral(stop[1])];\n });\n if (zoomAndFeatureDependent) {\n return convertZoomAndPropertyFunction(parameters, propertySpec, stops);\n }\n else if (zoomDependent) {\n return convertZoomFunction(parameters, propertySpec, stops);\n }\n else {\n return convertPropertyFunction(parameters, propertySpec, stops);\n }\n}\nfunction convertIdentityFunction(parameters, propertySpec) {\n const get = ['get', parameters.property];\n if (parameters.default === undefined) {\n // By default, expressions for string-valued properties get coerced. To preserve\n // legacy function semantics, insert an explicit assertion instead.\n return propertySpec.type === 'string' ? ['string', get] : get;\n }\n else if (propertySpec.type === 'enum') {\n return ['match', get, Object.keys(propertySpec.values), get, parameters.default];\n }\n else {\n const expression = [\n propertySpec.type === 'color' ? 'to-color' : propertySpec.type,\n get,\n convertLiteral(parameters.default)\n ];\n if (propertySpec.type === 'array') {\n expression.splice(1, 0, propertySpec.value, propertySpec.length || null);\n }\n return expression;\n }\n}\nfunction getInterpolateOperator(parameters) {\n switch (parameters.colorSpace) {\n case 'hcl':\n return 'interpolate-hcl';\n case 'lab':\n return 'interpolate-lab';\n default:\n return 'interpolate';\n }\n}\nfunction convertZoomAndPropertyFunction(parameters, propertySpec, stops) {\n const featureFunctionParameters = {};\n const featureFunctionStops = {};\n const zoomStops = [];\n for (let s = 0; s < stops.length; s++) {\n const stop = stops[s];\n const zoom = stop[0].zoom;\n if (featureFunctionParameters[zoom] === undefined) {\n featureFunctionParameters[zoom] = {\n zoom,\n type: parameters.type,\n property: parameters.property,\n default: parameters.default\n };\n featureFunctionStops[zoom] = [];\n zoomStops.push(zoom);\n }\n featureFunctionStops[zoom].push([stop[0].value, stop[1]]);\n }\n // the interpolation type for the zoom dimension of a zoom-and-property\n // function is determined directly from the style property specification\n // for which it's being used: linear for interpolatable properties, step\n // otherwise.\n const functionType = getFunctionType({}, propertySpec);\n if (functionType === 'exponential') {\n const expression = [getInterpolateOperator(parameters), ['linear'], ['zoom']];\n for (const z of zoomStops) {\n const output = convertPropertyFunction(featureFunctionParameters[z], propertySpec, featureFunctionStops[z]);\n appendStopPair(expression, z, output, false);\n }\n return expression;\n }\n else {\n const expression = ['step', ['zoom']];\n for (const z of zoomStops) {\n const output = convertPropertyFunction(featureFunctionParameters[z], propertySpec, featureFunctionStops[z]);\n appendStopPair(expression, z, output, true);\n }\n fixupDegenerateStepCurve(expression);\n return expression;\n }\n}\nfunction coalesce(a, b) {\n if (a !== undefined)\n return a;\n if (b !== undefined)\n return b;\n}\nfunction getFallback(parameters, propertySpec) {\n const defaultValue = convertLiteral(coalesce(parameters.default, propertySpec.default));\n /*\n * Some fields with type: resolvedImage have an undefined default.\n * Because undefined is an invalid value for resolvedImage, set fallback to\n * an empty string instead of undefined to ensure output\n * passes validation.\n */\n if (defaultValue === undefined && propertySpec.type === 'resolvedImage') {\n return '';\n }\n return defaultValue;\n}\nfunction convertPropertyFunction(parameters, propertySpec, stops) {\n const type = getFunctionType(parameters, propertySpec);\n const get = ['get', parameters.property];\n if (type === 'categorical' && typeof stops[0][0] === 'boolean') {\n const expression = ['case'];\n for (const stop of stops) {\n expression.push(['==', get, stop[0]], stop[1]);\n }\n expression.push(getFallback(parameters, propertySpec));\n return expression;\n }\n else if (type === 'categorical') {\n const expression = ['match', get];\n for (const stop of stops) {\n appendStopPair(expression, stop[0], stop[1], false);\n }\n expression.push(getFallback(parameters, propertySpec));\n return expression;\n }\n else if (type === 'interval') {\n const expression = ['step', ['number', get]];\n for (const stop of stops) {\n appendStopPair(expression, stop[0], stop[1], true);\n }\n fixupDegenerateStepCurve(expression);\n return parameters.default === undefined\n ? expression\n : [\n 'case',\n ['==', ['typeof', get], 'number'],\n expression,\n convertLiteral(parameters.default)\n ];\n }\n else if (type === 'exponential') {\n const base = parameters.base !== undefined ? parameters.base : 1;\n const expression = [\n getInterpolateOperator(parameters),\n base === 1 ? ['linear'] : ['exponential', base],\n ['number', get]\n ];\n for (const stop of stops) {\n appendStopPair(expression, stop[0], stop[1], false);\n }\n return parameters.default === undefined\n ? expression\n : [\n 'case',\n ['==', ['typeof', get], 'number'],\n expression,\n convertLiteral(parameters.default)\n ];\n }\n else {\n throw new Error(`Unknown property function type ${type}`);\n }\n}\nfunction convertZoomFunction(parameters, propertySpec, stops, input = ['zoom']) {\n const type = getFunctionType(parameters, propertySpec);\n let expression;\n let isStep = false;\n if (type === 'interval') {\n expression = ['step', input];\n isStep = true;\n }\n else if (type === 'exponential') {\n const base = parameters.base !== undefined ? parameters.base : 1;\n expression = [\n getInterpolateOperator(parameters),\n base === 1 ? ['linear'] : ['exponential', base],\n input\n ];\n }\n else {\n throw new Error(`Unknown zoom function type \"${type}\"`);\n }\n for (const stop of stops) {\n appendStopPair(expression, stop[0], stop[1], isStep);\n }\n fixupDegenerateStepCurve(expression);\n return expression;\n}\nfunction fixupDegenerateStepCurve(expression) {\n // degenerate step curve (i.e. a constant function): add a noop stop\n if (expression[0] === 'step' && expression.length === 3) {\n expression.push(0);\n expression.push(expression[3]);\n }\n}\nfunction appendStopPair(curve, input, output, isStep) {\n // Skip duplicate stop values. They were not validated for functions, but they are for expressions.\n // https://github.com/mapbox/mapbox-gl-js/issues/4107\n if (curve.length > 3 && input === curve[curve.length - 2]) {\n return;\n }\n // step curves don't get the first input value, as it is redundant.\n if (!(isStep && curve.length === 2)) {\n curve.push(input);\n }\n curve.push(output);\n}\nfunction getFunctionType(parameters, propertySpec) {\n if (parameters.type) {\n return parameters.type;\n }\n else {\n return propertySpec.expression.interpolated ? 'exponential' : 'interval';\n }\n}\n// \"String with {name} token\" => [\"concat\", \"String with \", [\"get\", \"name\"], \" token\"]\nfunction convertTokenString(s) {\n const result = ['concat'];\n const re = /{([^{}]+)}/g;\n let pos = 0;\n for (let match = re.exec(s); match !== null; match = re.exec(s)) {\n const literal = s.slice(pos, re.lastIndex - match[0].length);\n pos = re.lastIndex;\n if (literal.length > 0)\n result.push(literal);\n result.push(['get', match[1]]);\n }\n if (result.length === 1) {\n return s;\n }\n if (pos < s.length) {\n result.push(s.slice(pos));\n }\n else if (result.length === 2) {\n return ['to-string', result[1]];\n }\n return result;\n}\n\nfunction getPropertyReference(propertyName) {\n for (let i = 0; i < v8Spec.layout.length; i++) {\n for (const key in v8Spec[v8Spec.layout[i]]) {\n if (key === propertyName)\n return v8Spec[v8Spec.layout[i]][key];\n }\n }\n for (let i = 0; i < v8Spec.paint.length; i++) {\n for (const key in v8Spec[v8Spec.paint[i]]) {\n if (key === propertyName)\n return v8Spec[v8Spec.paint[i]][key];\n }\n }\n return null;\n}\nfunction eachSource(style, callback) {\n for (const k in style.sources) {\n callback(style.sources[k]);\n }\n}\nfunction eachLayer(style, callback) {\n for (const layer of style.layers) {\n callback(layer);\n }\n}\nfunction eachProperty(style, options, callback) {\n function inner(layer, propertyType) {\n const properties = layer[propertyType];\n if (!properties)\n return;\n Object.keys(properties).forEach((key) => {\n callback({\n path: [layer.id, propertyType, key],\n key,\n value: properties[key],\n reference: getPropertyReference(key),\n set(x) {\n properties[key] = x;\n }\n });\n });\n }\n eachLayer(style, (layer) => {\n if (options.paint) {\n inner(layer, 'paint');\n }\n if (options.layout) {\n inner(layer, 'layout');\n }\n });\n}\n\nfunction stringify$1(obj) {\n const type = typeof obj;\n if (type === 'number' ||\n type === 'boolean' ||\n type === 'string' ||\n obj === undefined ||\n obj === null)\n return JSON.stringify(obj);\n if (Array.isArray(obj)) {\n let str = '[';\n for (const val of obj) {\n str += `${stringify$1(val)},`;\n }\n return `${str}]`;\n }\n const keys = Object.keys(obj).sort();\n let str = '{';\n for (let i = 0; i < keys.length; i++) {\n str += `${JSON.stringify(keys[i])}:${stringify$1(obj[keys[i]])},`;\n }\n return `${str}}`;\n}\nfunction getKey(layer) {\n let key = '';\n for (const k of refProperties) {\n key += `/${stringify$1(layer[k])}`;\n }\n return key;\n}\n/**\n * Groups layers by their layout-affecting properties.\n * These are the properties that were formerly used by explicit `ref` mechanism\n * for layers: 'type', 'source', 'source-layer', 'minzoom', 'maxzoom',\n * 'filter', and 'layout'.\n *\n * The input is not modified. The output layers are references to the\n * input layers.\n *\n * @param layers - an array of {@link LayerSpecification}.\n * @param cachedKeys - an object to keep already calculated keys.\n * @returns an array of arrays of {@link LayerSpecification} objects, where each inner array\n * contains layers that share the same layout-affecting properties.\n */\nfunction groupByLayout(layers, cachedKeys) {\n const groups = {};\n for (let i = 0; i < layers.length; i++) {\n const k = (cachedKeys && cachedKeys[layers[i].id]) || getKey(layers[i]);\n // update the cache if there is one\n if (cachedKeys)\n cachedKeys[layers[i].id] = k;\n let group = groups[k];\n if (!group) {\n group = groups[k] = [];\n }\n group.push(layers[i]);\n }\n const result = [];\n for (const k in groups) {\n result.push(groups[k]);\n }\n return result;\n}\n\nfunction emptyStyle() {\n const style = {};\n const version = v8Spec['$version'];\n for (const styleKey in v8Spec['$root']) {\n const specification = v8Spec['$root'][styleKey];\n if (specification.required) {\n let value = null;\n if (styleKey === 'version') {\n value = version;\n }\n else {\n if (specification.type === 'array') {\n value = [];\n }\n else {\n value = {};\n }\n }\n if (value != null) {\n style[styleKey] = value;\n }\n }\n }\n return style;\n}\n\nfunction validateConstants(options) {\n const key = options.key;\n const constants = options.value;\n if (constants) {\n return [new ValidationError(key, constants, 'constants have been deprecated as of v8')];\n }\n else {\n return [];\n }\n}\n\n// Turn jsonlint-lines-primitives objects into primitive objects\nfunction unbundle(value) {\n if (value instanceof Number || value instanceof String || value instanceof Boolean) {\n return value.valueOf();\n }\n else {\n return value;\n }\n}\nfunction deepUnbundle(value) {\n if (Array.isArray(value)) {\n return value.map(deepUnbundle);\n }\n else if (value instanceof Object &&\n !(value instanceof Number || value instanceof String || value instanceof Boolean)) {\n const unbundledValue = {};\n for (const key in value) {\n unbundledValue[key] = deepUnbundle(value[key]);\n }\n return unbundledValue;\n }\n return unbundle(value);\n}\n\nfunction validateObject(options) {\n const key = options.key;\n const object = options.value;\n const elementSpecs = options.valueSpec || {};\n const elementValidators = options.objectElementValidators || {};\n const style = options.style;\n const styleSpec = options.styleSpec;\n const validateSpec = options.validateSpec;\n let errors = [];\n const type = getType(object);\n if (type !== 'object') {\n return [new ValidationError(key, object, `object expected, ${type} found`)];\n }\n for (const objectKey in object) {\n const elementSpecKey = objectKey.split('.')[0]; // treat 'paint.*' as 'paint'\n // objectKey comes from the user controlled style input, so elementSpecKey may be e.g. \"__proto__\"\n const elementSpec = getOwn(elementSpecs, elementSpecKey) || elementSpecs['*'];\n let validateElement;\n if (getOwn(elementValidators, elementSpecKey)) {\n validateElement = elementValidators[elementSpecKey];\n }\n else if (getOwn(elementSpecs, elementSpecKey)) {\n if (object[objectKey] === undefined) {\n // property is possible, set but set to undefined\n // we only check it if it is required and not defaulted in the next loop\n // without skipping here, we would alert to properties being set to undefined\n continue;\n }\n validateElement = validateSpec;\n }\n else if (elementValidators['*']) {\n validateElement = elementValidators['*'];\n }\n else if (elementSpecs['*']) {\n validateElement = validateSpec;\n }\n else {\n errors.push(new ValidationError(key, object[objectKey], `unknown property \"${objectKey}\"`));\n continue;\n }\n errors = errors.concat(validateElement({\n key: (key ? `${key}.` : key) + objectKey,\n value: object[objectKey],\n valueSpec: elementSpec,\n style,\n styleSpec,\n object,\n objectKey,\n validateSpec\n }, object));\n }\n for (const elementSpecKey in elementSpecs) {\n // Don't check `required` when there's a custom validator for that property.\n if (elementValidators[elementSpecKey]) {\n continue;\n }\n if (elementSpecs[elementSpecKey].required &&\n elementSpecs[elementSpecKey]['default'] === undefined &&\n object[elementSpecKey] === undefined) {\n errors.push(new ValidationError(key, object, `missing required property \"${elementSpecKey}\"`));\n }\n }\n return errors;\n}\n\nfunction validateArray(options) {\n const array = options.value;\n const arraySpec = options.valueSpec;\n const validateSpec = options.validateSpec;\n const style = options.style;\n const styleSpec = options.styleSpec;\n const key = options.key;\n const validateArrayElement = options.arrayElementValidator || validateSpec;\n if (getType(array) !== 'array') {\n return [new ValidationError(key, array, `array expected, ${getType(array)} found`)];\n }\n if (arraySpec.length && array.length !== arraySpec.length) {\n return [\n new ValidationError(key, array, `array length ${arraySpec.length} expected, length ${array.length} found`)\n ];\n }\n let arrayElementSpec = {\n type: arraySpec.value,\n values: arraySpec.values\n };\n if (styleSpec.$version < 7) {\n arrayElementSpec['function'] = arraySpec.function;\n }\n if (getType(arraySpec.value) === 'object') {\n arrayElementSpec = arraySpec.value;\n }\n let errors = [];\n for (let i = 0; i < array.length; i++) {\n errors = errors.concat(validateArrayElement({\n array,\n arrayIndex: i,\n value: array[i],\n valueSpec: arrayElementSpec,\n validateSpec: options.validateSpec,\n style,\n styleSpec,\n key: `${key}[${i}]`\n }));\n }\n return errors;\n}\n\nfunction validateNumber(options) {\n const key = options.key;\n const value = options.value;\n const valueSpec = options.valueSpec;\n let type = getType(value);\n if (type === 'number' && value !== value) {\n type = 'NaN';\n }\n if (type !== 'number') {\n return [new ValidationError(key, value, `number expected, ${type} found`)];\n }\n if ('minimum' in valueSpec && value < valueSpec.minimum) {\n return [\n new ValidationError(key, value, `${value} is less than the minimum value ${valueSpec.minimum}`)\n ];\n }\n if ('maximum' in valueSpec && value > valueSpec.maximum) {\n return [\n new ValidationError(key, value, `${value} is greater than the maximum value ${valueSpec.maximum}`)\n ];\n }\n return [];\n}\n\nfunction validateFunction(options) {\n const functionValueSpec = options.valueSpec;\n const functionType = unbundle(options.value.type);\n let stopKeyType;\n let stopDomainValues = {};\n let previousStopDomainValue;\n let previousStopDomainZoom;\n const isZoomFunction = functionType !== 'categorical' && options.value.property === undefined;\n const isPropertyFunction = !isZoomFunction;\n const isZoomAndPropertyFunction = getType(options.value.stops) === 'array' &&\n getType(options.value.stops[0]) === 'array' &&\n getType(options.value.stops[0][0]) === 'object';\n const errors = validateObject({\n key: options.key,\n value: options.value,\n valueSpec: options.styleSpec.function,\n validateSpec: options.validateSpec,\n style: options.style,\n styleSpec: options.styleSpec,\n objectElementValidators: {\n stops: validateFunctionStops,\n default: validateFunctionDefault\n }\n });\n if (functionType === 'identity' && isZoomFunction) {\n errors.push(new ValidationError(options.key, options.value, 'missing required property \"property\"'));\n }\n if (functionType !== 'identity' && !options.value.stops) {\n errors.push(new ValidationError(options.key, options.value, 'missing required property \"stops\"'));\n }\n if (functionType === 'exponential' &&\n options.valueSpec.expression &&\n !supportsInterpolation(options.valueSpec)) {\n errors.push(new ValidationError(options.key, options.value, 'exponential functions not supported'));\n }\n if (options.styleSpec.$version >= 8) {\n if (isPropertyFunction && !supportsPropertyExpression(options.valueSpec)) {\n errors.push(new ValidationError(options.key, options.value, 'property functions not supported'));\n }\n else if (isZoomFunction && !supportsZoomExpression(options.valueSpec)) {\n errors.push(new ValidationError(options.key, options.value, 'zoom functions not supported'));\n }\n }\n if ((functionType === 'categorical' || isZoomAndPropertyFunction) &&\n options.value.property === undefined) {\n errors.push(new ValidationError(options.key, options.value, '\"property\" property is required'));\n }\n return errors;\n function validateFunctionStops(options) {\n if (functionType === 'identity') {\n return [\n new ValidationError(options.key, options.value, 'identity function may not have a \"stops\" property')\n ];\n }\n let errors = [];\n const value = options.value;\n errors = errors.concat(validateArray({\n key: options.key,\n value,\n valueSpec: options.valueSpec,\n validateSpec: options.validateSpec,\n style: options.style,\n styleSpec: options.styleSpec,\n arrayElementValidator: validateFunctionStop\n }));\n if (getType(value) === 'array' && value.length === 0) {\n errors.push(new ValidationError(options.key, value, 'array must have at least one stop'));\n }\n return errors;\n }\n function validateFunctionStop(options) {\n let errors = [];\n const value = options.value;\n const key = options.key;\n if (getType(value) !== 'array') {\n return [new ValidationError(key, value, `array expected, ${getType(value)} found`)];\n }\n if (value.length !== 2) {\n return [\n new ValidationError(key, value, `array length 2 expected, length ${value.length} found`)\n ];\n }\n if (isZoomAndPropertyFunction) {\n if (getType(value[0]) !== 'object') {\n return [\n new ValidationError(key, value, `object expected, ${getType(value[0])} found`)\n ];\n }\n if (value[0].zoom === undefined) {\n return [new ValidationError(key, value, 'object stop key must have zoom')];\n }\n if (value[0].value === undefined) {\n return [new ValidationError(key, value, 'object stop key must have value')];\n }\n if (previousStopDomainZoom && previousStopDomainZoom > unbundle(value[0].zoom)) {\n return [\n new ValidationError(key, value[0].zoom, 'stop zoom values must appear in ascending order')\n ];\n }\n if (unbundle(value[0].zoom) !== previousStopDomainZoom) {\n previousStopDomainZoom = unbundle(value[0].zoom);\n previousStopDomainValue = undefined;\n stopDomainValues = {};\n }\n errors = errors.concat(validateObject({\n key: `${key}[0]`,\n value: value[0],\n valueSpec: { zoom: {} },\n validateSpec: options.validateSpec,\n style: options.style,\n styleSpec: options.styleSpec,\n objectElementValidators: {\n zoom: validateNumber,\n value: validateStopDomainValue\n }\n }));\n }\n else {\n errors = errors.concat(validateStopDomainValue({\n key: `${key}[0]`,\n value: value[0],\n validateSpec: options.validateSpec,\n style: options.style,\n styleSpec: options.styleSpec\n }, value));\n }\n if (isExpression(deepUnbundle(value[1]))) {\n return errors.concat([\n new ValidationError(`${key}[1]`, value[1], 'expressions are not allowed in function stops.')\n ]);\n }\n return errors.concat(options.validateSpec({\n key: `${key}[1]`,\n value: value[1],\n valueSpec: functionValueSpec,\n validateSpec: options.validateSpec,\n style: options.style,\n styleSpec: options.styleSpec\n }));\n }\n function validateStopDomainValue(options, stop) {\n const type = getType(options.value);\n const value = unbundle(options.value);\n const reportValue = options.value !== null ? options.value : stop;\n if (!stopKeyType) {\n stopKeyType = type;\n }\n else if (type !== stopKeyType) {\n return [\n new ValidationError(options.key, reportValue, `${type} stop domain type must match previous stop domain type ${stopKeyType}`)\n ];\n }\n if (type !== 'number' && type !== 'string' && type !== 'boolean') {\n return [\n new ValidationError(options.key, reportValue, 'stop domain value must be a number, string, or boolean')\n ];\n }\n if (type !== 'number' && functionType !== 'categorical') {\n let message = `number expected, ${type} found`;\n if (supportsPropertyExpression(functionValueSpec) && functionType === undefined) {\n message +=\n '\\nIf you intended to use a categorical function, specify `\"type\": \"categorical\"`.';\n }\n return [new ValidationError(options.key, reportValue, message)];\n }\n if (functionType === 'categorical' &&\n type === 'number' &&\n (!isFinite(value) || Math.floor(value) !== value)) {\n return [\n new ValidationError(options.key, reportValue, `integer expected, found ${value}`)\n ];\n }\n if (functionType !== 'categorical' &&\n type === 'number' &&\n previousStopDomainValue !== undefined &&\n value < previousStopDomainValue) {\n return [\n new ValidationError(options.key, reportValue, 'stop domain values must appear in ascending order')\n ];\n }\n else {\n previousStopDomainValue = value;\n }\n if (functionType === 'categorical' && value in stopDomainValues) {\n return [\n new ValidationError(options.key, reportValue, 'stop domain values must be unique')\n ];\n }\n else {\n stopDomainValues[value] = true;\n }\n return [];\n }\n function validateFunctionDefault(options) {\n return options.validateSpec({\n key: options.key,\n value: options.value,\n valueSpec: functionValueSpec,\n validateSpec: options.validateSpec,\n style: options.style,\n styleSpec: options.styleSpec\n });\n }\n}\n\nfunction validateExpression(options) {\n const expression = (options.expressionContext === 'property' ? createPropertyExpression : createExpression)(deepUnbundle(options.value), options.valueSpec);\n if (expression.result === 'error') {\n return expression.value.map((error) => {\n return new ValidationError(`${options.key}${error.key}`, options.value, error.message);\n });\n }\n const expressionObj = expression.value.expression ||\n expression.value._styleExpression.expression;\n if (options.expressionContext === 'property' &&\n options.propertyKey === 'text-font' &&\n !expressionObj.outputDefined()) {\n return [\n new ValidationError(options.key, options.value, `Invalid data expression for \"${options.propertyKey}\". Output values must be contained as literals within the expression.`)\n ];\n }\n if (options.expressionContext === 'property' &&\n options.propertyType === 'layout' &&\n !isStateConstant(expressionObj)) {\n return [\n new ValidationError(options.key, options.value, '\"feature-state\" data expressions are not supported with layout properties.')\n ];\n }\n if (options.expressionContext === 'filter' && !isStateConstant(expressionObj)) {\n return [\n new ValidationError(options.key, options.value, '\"feature-state\" data expressions are not supported with filters.')\n ];\n }\n if (options.expressionContext && options.expressionContext.indexOf('cluster') === 0) {\n if (!isGlobalPropertyConstant(expressionObj, ['zoom', 'feature-state'])) {\n return [\n new ValidationError(options.key, options.value, '\"zoom\" and \"feature-state\" expressions are not supported with cluster properties.')\n ];\n }\n if (options.expressionContext === 'cluster-initial' && !isFeatureConstant(expressionObj)) {\n return [\n new ValidationError(options.key, options.value, 'Feature data expressions are not supported with initial expression part of cluster properties.')\n ];\n }\n }\n return [];\n}\n\nfunction validateBoolean(options) {\n const value = options.value;\n const key = options.key;\n const type = getType(value);\n if (type !== 'boolean') {\n return [new ValidationError(key, value, `boolean expected, ${type} found`)];\n }\n return [];\n}\n\nfunction validateColor(options) {\n const key = options.key;\n const value = options.value;\n const type = getType(value);\n if (type !== 'string') {\n return [new ValidationError(key, value, `color expected, ${type} found`)];\n }\n if (!Color.parse(String(value))) {\n // cast String object to string primitive\n return [new ValidationError(key, value, `color expected, \"${value}\" found`)];\n }\n return [];\n}\n\nfunction validateEnum(options) {\n const key = options.key;\n const value = options.value;\n const valueSpec = options.valueSpec;\n const errors = [];\n if (Array.isArray(valueSpec.values)) {\n // <=v7\n if (valueSpec.values.indexOf(unbundle(value)) === -1) {\n errors.push(new ValidationError(key, value, `expected one of [${valueSpec.values.join(', ')}], ${JSON.stringify(value)} found`));\n }\n }\n else {\n // >=v8\n if (Object.keys(valueSpec.values).indexOf(unbundle(value)) === -1) {\n errors.push(new ValidationError(key, value, `expected one of [${Object.keys(valueSpec.values).join(', ')}], ${JSON.stringify(value)} found`));\n }\n }\n return errors;\n}\n\nfunction validateFilter(options) {\n if (isExpressionFilter(deepUnbundle(options.value))) {\n return validateExpression(extendBy({}, options, {\n expressionContext: 'filter',\n valueSpec: { value: 'boolean' }\n }));\n }\n else {\n return validateNonExpressionFilter(options);\n }\n}\nfunction validateNonExpressionFilter(options) {\n const value = options.value;\n const key = options.key;\n if (getType(value) !== 'array') {\n return [new ValidationError(key, value, `array expected, ${getType(value)} found`)];\n }\n const styleSpec = options.styleSpec;\n let type;\n let errors = [];\n if (value.length < 1) {\n return [new ValidationError(key, value, 'filter array must have at least 1 element')];\n }\n errors = errors.concat(validateEnum({\n key: `${key}[0]`,\n value: value[0],\n valueSpec: styleSpec.filter_operator,\n style: options.style,\n styleSpec: options.styleSpec\n }));\n switch (unbundle(value[0])) {\n case '<':\n case '<=':\n case '>':\n case '>=':\n if (value.length >= 2 && unbundle(value[1]) === '$type') {\n errors.push(new ValidationError(key, value, `\"$type\" cannot be use with operator \"${value[0]}\"`));\n }\n /* falls through */\n case '==':\n case '!=':\n if (value.length !== 3) {\n errors.push(new ValidationError(key, value, `filter array for operator \"${value[0]}\" must have 3 elements`));\n }\n /* falls through */\n case 'in':\n case '!in':\n if (value.length >= 2) {\n type = getType(value[1]);\n if (type !== 'string') {\n errors.push(new ValidationError(`${key}[1]`, value[1], `string expected, ${type} found`));\n }\n }\n for (let i = 2; i < value.length; i++) {\n type = getType(value[i]);\n if (unbundle(value[1]) === '$type') {\n errors = errors.concat(validateEnum({\n key: `${key}[${i}]`,\n value: value[i],\n valueSpec: styleSpec.geometry_type,\n style: options.style,\n styleSpec: options.styleSpec\n }));\n }\n else if (type !== 'string' && type !== 'number' && type !== 'boolean') {\n errors.push(new ValidationError(`${key}[${i}]`, value[i], `string, number, or boolean expected, ${type} found`));\n }\n }\n break;\n case 'any':\n case 'all':\n case 'none':\n for (let i = 1; i < value.length; i++) {\n errors = errors.concat(validateNonExpressionFilter({\n key: `${key}[${i}]`,\n value: value[i],\n style: options.style,\n styleSpec: options.styleSpec\n }));\n }\n break;\n case 'has':\n case '!has':\n type = getType(value[1]);\n if (value.length !== 2) {\n errors.push(new ValidationError(key, value, `filter array for \"${value[0]}\" operator must have 2 elements`));\n }\n else if (type !== 'string') {\n errors.push(new ValidationError(`${key}[1]`, value[1], `string expected, ${type} found`));\n }\n break;\n }\n return errors;\n}\n\nfunction validateProperty(options, propertyType) {\n const key = options.key;\n const validateSpec = options.validateSpec;\n const style = options.style;\n const styleSpec = options.styleSpec;\n const value = options.value;\n const propertyKey = options.objectKey;\n const layerSpec = styleSpec[`${propertyType}_${options.layerType}`];\n if (!layerSpec)\n return [];\n const transitionMatch = propertyKey.match(/^(.*)-transition$/);\n if (propertyType === 'paint' &&\n transitionMatch &&\n layerSpec[transitionMatch[1]] &&\n layerSpec[transitionMatch[1]].transition) {\n return validateSpec({\n key,\n value,\n valueSpec: styleSpec.transition,\n style,\n styleSpec\n });\n }\n const valueSpec = options.valueSpec || layerSpec[propertyKey];\n if (!valueSpec) {\n return [new ValidationError(key, value, `unknown property \"${propertyKey}\"`)];\n }\n let tokenMatch;\n if (getType(value) === 'string' &&\n supportsPropertyExpression(valueSpec) &&\n !valueSpec.tokens &&\n (tokenMatch = /^{([^}]+)}$/.exec(value))) {\n return [\n new ValidationError(key, value, `\"${propertyKey}\" does not support interpolation syntax\\n` +\n `Use an identity property function instead: \\`{ \"type\": \"identity\", \"property\": ${JSON.stringify(tokenMatch[1])} }\\`.`)\n ];\n }\n const errors = [];\n if (options.layerType === 'symbol') {\n if (propertyKey === 'text-font' &&\n isFunction$1(deepUnbundle(value)) &&\n unbundle(value.type) === 'identity') {\n errors.push(new ValidationError(key, value, '\"text-font\" does not support identity functions'));\n }\n }\n return errors.concat(validateSpec({\n key: options.key,\n value,\n valueSpec,\n style,\n styleSpec,\n expressionContext: 'property',\n propertyType,\n propertyKey\n }));\n}\n\nfunction validatePaintProperty(options) {\n return validateProperty(options, 'paint');\n}\n\nfunction validateLayoutProperty(options) {\n return validateProperty(options, 'layout');\n}\n\nfunction validateLayer(options) {\n var _a, _b;\n let errors = [];\n const layer = options.value;\n const key = options.key;\n const style = options.style;\n const styleSpec = options.styleSpec;\n if (getType(layer) !== 'object') {\n return [new ValidationError(key, layer, `object expected, ${getType(layer)} found`)];\n }\n if (!layer.type && !layer.ref) {\n errors.push(new ValidationError(key, layer, 'either \"type\" or \"ref\" is required'));\n }\n let type = unbundle(layer.type);\n const ref = unbundle(layer.ref);\n if (layer.id) {\n const layerId = unbundle(layer.id);\n for (let i = 0; i < options.arrayIndex; i++) {\n const otherLayer = style.layers[i];\n if (unbundle(otherLayer.id) === layerId) {\n errors.push(new ValidationError(key, layer.id, `duplicate layer id \"${layer.id}\", previously used at line ${otherLayer.id.__line__}`));\n }\n }\n }\n if ('ref' in layer) {\n ['type', 'source', 'source-layer', 'filter', 'layout'].forEach((p) => {\n if (p in layer) {\n errors.push(new ValidationError(key, layer[p], `\"${p}\" is prohibited for ref layers`));\n }\n });\n let parent;\n style.layers.forEach((layer) => {\n if (unbundle(layer.id) === ref)\n parent = layer;\n });\n if (!parent) {\n errors.push(new ValidationError(key, layer.ref, `ref layer \"${ref}\" not found`));\n }\n else if (parent.ref) {\n errors.push(new ValidationError(key, layer.ref, 'ref cannot reference another ref layer'));\n }\n else {\n type = unbundle(parent.type);\n }\n }\n else if (type !== 'background') {\n if (!layer.source) {\n errors.push(new ValidationError(key, layer, 'missing required property \"source\"'));\n }\n else {\n const source = style.sources && style.sources[layer.source];\n const sourceType = source && unbundle(source.type);\n if (!source) {\n errors.push(new ValidationError(key, layer.source, `source \"${layer.source}\" not found`));\n }\n else if (sourceType === 'vector' && type === 'raster') {\n errors.push(new ValidationError(key, layer.source, `layer \"${layer.id}\" requires a raster source`));\n }\n else if (sourceType !== 'raster-dem' && type === 'hillshade') {\n errors.push(new ValidationError(key, layer.source, `layer \"${layer.id}\" requires a raster-dem source`));\n }\n else if (sourceType !== 'raster-dem' && type === 'color-relief') {\n errors.push(new ValidationError(key, layer.source, `layer \"${layer.id}\" requires a raster-dem source`));\n }\n else if (sourceType === 'raster' && type !== 'raster') {\n errors.push(new ValidationError(key, layer.source, `layer \"${layer.id}\" requires a vector source`));\n }\n else if (sourceType === 'vector' && !layer['source-layer']) {\n errors.push(new ValidationError(key, layer, `layer \"${layer.id}\" must specify a \"source-layer\"`));\n }\n else if (sourceType === 'raster-dem' &&\n type !== 'hillshade' &&\n type !== 'color-relief') {\n errors.push(new ValidationError(key, layer.source, \"raster-dem source can only be used with layer type 'hillshade' or 'color-relief'.\"));\n }\n else if (type === 'line' &&\n layer.paint &&\n layer.paint['line-gradient'] &&\n (sourceType !== 'geojson' || !source.lineMetrics)) {\n errors.push(new ValidationError(key, layer, `layer \"${layer.id}\" specifies a line-gradient, which requires a GeoJSON source with \\`lineMetrics\\` enabled.`));\n }\n }\n }\n if (type === 'raster' && ((_a = layer.paint) === null || _a === void 0 ? void 0 : _a.resampling) && ((_b = layer.paint) === null || _b === void 0 ? void 0 : _b['raster-resampling'])) {\n errors.push(new ValidationError(key, layer.paint, `layer \"${layer.id}\" redundantly specifies \"resampling\" and \"raster-resampling\" paint properties, but only one is allowed. It is advised to use \"resampling\".`));\n }\n errors = errors.concat(validateObject({\n key,\n value: layer,\n valueSpec: styleSpec.layer,\n style: options.style,\n styleSpec: options.styleSpec,\n validateSpec: options.validateSpec,\n objectElementValidators: {\n '*'() {\n return [];\n },\n // We don't want to enforce the spec's `\"requires\": true` for backward compatibility with refs;\n // the actual requirement is validated above. See https://github.com/mapbox/mapbox-gl-js/issues/5772.\n type() {\n return options.validateSpec({\n key: `${key}.type`,\n value: layer.type,\n valueSpec: styleSpec.layer.type,\n style: options.style,\n styleSpec: options.styleSpec,\n validateSpec: options.validateSpec,\n object: layer,\n objectKey: 'type'\n });\n },\n filter: validateFilter,\n layout(options) {\n return validateObject({\n layer,\n key: options.key,\n value: options.value,\n style: options.style,\n styleSpec: options.styleSpec,\n validateSpec: options.validateSpec,\n objectElementValidators: {\n '*'(options) {\n return validateLayoutProperty(extendBy({ layerType: type }, options));\n }\n }\n });\n },\n paint(options) {\n return validateObject({\n layer,\n key: options.key,\n value: options.value,\n style: options.style,\n styleSpec: options.styleSpec,\n validateSpec: options.validateSpec,\n objectElementValidators: {\n '*'(options) {\n return validatePaintProperty(extendBy({ layerType: type }, options));\n }\n }\n });\n }\n }\n }));\n return errors;\n}\n\nfunction validateString(options) {\n const value = options.value;\n const key = options.key;\n const type = getType(value);\n if (type !== 'string') {\n return [new ValidationError(key, value, `string expected, ${type} found`)];\n }\n return [];\n}\n\nfunction validateRasterDEMSource(options) {\n var _a;\n const sourceName = (_a = options.sourceName) !== null && _a !== void 0 ? _a : '';\n const rasterDEM = options.value;\n const styleSpec = options.styleSpec;\n const rasterDEMSpec = styleSpec.source_raster_dem;\n const style = options.style;\n let errors = [];\n const rootType = getType(rasterDEM);\n if (rasterDEM === undefined) {\n return errors;\n }\n else if (rootType !== 'object') {\n errors.push(new ValidationError('source_raster_dem', rasterDEM, `object expected, ${rootType} found`));\n return errors;\n }\n const encoding = unbundle(rasterDEM.encoding);\n const isCustomEncoding = encoding === 'custom';\n const customEncodingKeys = ['redFactor', 'greenFactor', 'blueFactor', 'baseShift'];\n const encodingName = options.value.encoding ? `\"${options.value.encoding}\"` : 'Default';\n for (const key in rasterDEM) {\n if (!isCustomEncoding && customEncodingKeys.includes(key)) {\n errors.push(new ValidationError(key, rasterDEM[key], `In \"${sourceName}\": \"${key}\" is only valid when \"encoding\" is set to \"custom\". ${encodingName} encoding found`));\n }\n else if (rasterDEMSpec[key]) {\n errors = errors.concat(options.validateSpec({\n key,\n value: rasterDEM[key],\n valueSpec: rasterDEMSpec[key],\n validateSpec: options.validateSpec,\n style,\n styleSpec\n }));\n }\n else {\n errors.push(new ValidationError(key, rasterDEM[key], `unknown property \"${key}\"`));\n }\n }\n return errors;\n}\n\nconst objectElementValidators = {\n promoteId: validatePromoteId\n};\nfunction validateSource(options) {\n const value = options.value;\n const key = options.key;\n const styleSpec = options.styleSpec;\n const style = options.style;\n const validateSpec = options.validateSpec;\n if (!value.type) {\n return [new ValidationError(key, value, '\"type\" is required')];\n }\n const type = unbundle(value.type);\n let errors;\n switch (type) {\n case 'vector':\n case 'raster':\n errors = validateObject({\n key,\n value,\n valueSpec: styleSpec[`source_${type.replace('-', '_')}`],\n style: options.style,\n styleSpec,\n objectElementValidators,\n validateSpec\n });\n return errors;\n case 'raster-dem':\n errors = validateRasterDEMSource({\n sourceName: key,\n value,\n style: options.style,\n styleSpec,\n validateSpec\n });\n return errors;\n case 'geojson':\n errors = validateObject({\n key,\n value,\n valueSpec: styleSpec.source_geojson,\n style,\n styleSpec,\n validateSpec,\n objectElementValidators\n });\n if (value.cluster) {\n for (const prop in value.clusterProperties) {\n const [operator, mapExpr] = value.clusterProperties[prop];\n const reduceExpr = typeof operator === 'string'\n ? [operator, ['accumulated'], ['get', prop]]\n : operator;\n errors.push(...validateExpression({\n key: `${key}.${prop}.map`,\n value: mapExpr,\n expressionContext: 'cluster-map'\n }));\n errors.push(...validateExpression({\n key: `${key}.${prop}.reduce`,\n value: reduceExpr,\n expressionContext: 'cluster-reduce'\n }));\n }\n }\n return errors;\n case 'video':\n return validateObject({\n key,\n value,\n valueSpec: styleSpec.source_video,\n style,\n validateSpec,\n styleSpec\n });\n case 'image':\n return validateObject({\n key,\n value,\n valueSpec: styleSpec.source_image,\n style,\n validateSpec,\n styleSpec\n });\n case 'canvas':\n return [\n new ValidationError(key, null, 'Please use runtime APIs to add canvas sources, rather than including them in stylesheets.', 'source.canvas')\n ];\n default:\n return validateEnum({\n key: `${key}.type`,\n value: value.type,\n valueSpec: {\n values: ['vector', 'raster', 'raster-dem', 'geojson', 'video', 'image']\n }});\n }\n}\nfunction validatePromoteId({ key, value }) {\n if (getType(value) === 'string') {\n return validateString({ key, value });\n }\n else {\n const errors = [];\n for (const prop in value) {\n errors.push(...validateString({ key: `${key}.${prop}`, value: value[prop] }));\n }\n return errors;\n }\n}\n\nfunction validateLight(options) {\n const light = options.value;\n const styleSpec = options.styleSpec;\n const lightSpec = styleSpec.light;\n const style = options.style;\n let errors = [];\n const rootType = getType(light);\n if (light === undefined) {\n return errors;\n }\n else if (rootType !== 'object') {\n errors = errors.concat([\n new ValidationError('light', light, `object expected, ${rootType} found`)\n ]);\n return errors;\n }\n for (const key in light) {\n const transitionMatch = key.match(/^(.*)-transition$/);\n if (transitionMatch &&\n lightSpec[transitionMatch[1]] &&\n lightSpec[transitionMatch[1]].transition) {\n errors = errors.concat(options.validateSpec({\n key,\n value: light[key],\n valueSpec: styleSpec.transition,\n validateSpec: options.validateSpec,\n style,\n styleSpec\n }));\n }\n else if (lightSpec[key]) {\n errors = errors.concat(options.validateSpec({\n key,\n value: light[key],\n valueSpec: lightSpec[key],\n validateSpec: options.validateSpec,\n style,\n styleSpec\n }));\n }\n else {\n errors = errors.concat([\n new ValidationError(key, light[key], `unknown property \"${key}\"`)\n ]);\n }\n }\n return errors;\n}\n\nfunction validateSky(options) {\n const sky = options.value;\n const styleSpec = options.styleSpec;\n const skySpec = styleSpec.sky;\n const style = options.style;\n const rootType = getType(sky);\n if (sky === undefined) {\n return [];\n }\n else if (rootType !== 'object') {\n return [new ValidationError('sky', sky, `object expected, ${rootType} found`)];\n }\n let errors = [];\n for (const key in sky) {\n if (skySpec[key]) {\n errors = errors.concat(options.validateSpec({\n key,\n value: sky[key],\n valueSpec: skySpec[key],\n style,\n styleSpec\n }));\n }\n else {\n errors = errors.concat([\n new ValidationError(key, sky[key], `unknown property \"${key}\"`)\n ]);\n }\n }\n return errors;\n}\n\nfunction validateTerrain(options) {\n const terrain = options.value;\n const styleSpec = options.styleSpec;\n const terrainSpec = styleSpec.terrain;\n const style = options.style;\n let errors = [];\n const rootType = getType(terrain);\n if (terrain === undefined) {\n return errors;\n }\n else if (rootType !== 'object') {\n errors = errors.concat([\n new ValidationError('terrain', terrain, `object expected, ${rootType} found`)\n ]);\n return errors;\n }\n for (const key in terrain) {\n if (terrainSpec[key]) {\n errors = errors.concat(options.validateSpec({\n key,\n value: terrain[key],\n valueSpec: terrainSpec[key],\n validateSpec: options.validateSpec,\n style,\n styleSpec\n }));\n }\n else {\n errors = errors.concat([\n new ValidationError(key, terrain[key], `unknown property \"${key}\"`)\n ]);\n }\n }\n return errors;\n}\n\nfunction validateFormatted(options) {\n if (validateString(options).length === 0) {\n return [];\n }\n return validateExpression(options);\n}\n\nfunction validateImage(options) {\n if (validateString(options).length === 0) {\n return [];\n }\n return validateExpression(options);\n}\n\nfunction validatePadding(options) {\n const key = options.key;\n const value = options.value;\n const type = getType(value);\n if (type === 'array') {\n if (value.length < 1 || value.length > 4) {\n return [\n new ValidationError(key, value, `padding requires 1 to 4 values; ${value.length} values found`)\n ];\n }\n const arrayElementSpec = {\n type: 'number'\n };\n let errors = [];\n for (let i = 0; i < value.length; i++) {\n errors = errors.concat(options.validateSpec({\n key: `${key}[${i}]`,\n value: value[i],\n validateSpec: options.validateSpec,\n valueSpec: arrayElementSpec\n }));\n }\n return errors;\n }\n else {\n return validateNumber({\n key,\n value,\n valueSpec: {}\n });\n }\n}\n\nfunction validateNumberArray(options) {\n const key = options.key;\n const value = options.value;\n const type = getType(value);\n if (type === 'array') {\n const arrayElementSpec = {\n type: 'number'\n };\n if (value.length < 1) {\n return [\n new ValidationError(key, value, 'array length at least 1 expected, length 0 found')\n ];\n }\n let errors = [];\n for (let i = 0; i < value.length; i++) {\n errors = errors.concat(options.validateSpec({\n key: `${key}[${i}]`,\n value: value[i],\n validateSpec: options.validateSpec,\n valueSpec: arrayElementSpec\n }));\n }\n return errors;\n }\n else {\n return validateNumber({\n key,\n value,\n valueSpec: {}\n });\n }\n}\n\nfunction validateColorArray(options) {\n const key = options.key;\n const value = options.value;\n const type = getType(value);\n if (type === 'array') {\n if (value.length < 1) {\n return [\n new ValidationError(key, value, 'array length at least 1 expected, length 0 found')\n ];\n }\n let errors = [];\n for (let i = 0; i < value.length; i++) {\n errors = errors.concat(validateColor({\n key: `${key}[${i}]`,\n value: value[i]}));\n }\n return errors;\n }\n else {\n return validateColor({\n key,\n value});\n }\n}\n\nfunction validateVariableAnchorOffsetCollection(options) {\n const key = options.key;\n const value = options.value;\n const type = getType(value);\n const styleSpec = options.styleSpec;\n if (type !== 'array' || value.length < 1 || value.length % 2 !== 0) {\n return [\n new ValidationError(key, value, 'variableAnchorOffsetCollection requires a non-empty array of even length')\n ];\n }\n let errors = [];\n for (let i = 0; i < value.length; i += 2) {\n // Elements in even positions should be values from text-anchor enum\n errors = errors.concat(validateEnum({\n key: `${key}[${i}]`,\n value: value[i],\n valueSpec: styleSpec['layout_symbol']['text-anchor']\n }));\n // Elements in odd positions should be points (2-element numeric arrays)\n errors = errors.concat(validateArray({\n key: `${key}[${i + 1}]`,\n value: value[i + 1],\n valueSpec: {\n length: 2,\n value: 'number'\n },\n validateSpec: options.validateSpec,\n style: options.style,\n styleSpec\n }));\n }\n return errors;\n}\n\nfunction validateSprite(options) {\n let errors = [];\n const sprite = options.value;\n const key = options.key;\n if (!Array.isArray(sprite)) {\n return validateString({\n key,\n value: sprite\n });\n }\n else {\n const allSpriteIds = [];\n const allSpriteURLs = [];\n for (const i in sprite) {\n if (sprite[i].id && allSpriteIds.includes(sprite[i].id))\n errors.push(new ValidationError(key, sprite, `all the sprites' ids must be unique, but ${sprite[i].id} is duplicated`));\n allSpriteIds.push(sprite[i].id);\n if (sprite[i].url && allSpriteURLs.includes(sprite[i].url))\n errors.push(new ValidationError(key, sprite, `all the sprites' URLs must be unique, but ${sprite[i].url} is duplicated`));\n allSpriteURLs.push(sprite[i].url);\n const pairSpec = {\n id: {\n type: 'string',\n required: true\n },\n url: {\n type: 'string',\n required: true\n }\n };\n errors = errors.concat(validateObject({\n key: `${key}[${i}]`,\n value: sprite[i],\n valueSpec: pairSpec,\n validateSpec: options.validateSpec\n }));\n }\n return errors;\n }\n}\n\nfunction validateProjection(options) {\n const projection = options.value;\n const styleSpec = options.styleSpec;\n const projectionSpec = styleSpec.projection;\n const style = options.style;\n const rootType = getType(projection);\n if (projection === undefined) {\n return [];\n }\n else if (rootType !== 'object') {\n return [\n new ValidationError('projection', projection, `object expected, ${rootType} found`)\n ];\n }\n let errors = [];\n for (const key in projection) {\n if (projectionSpec[key]) {\n errors = errors.concat(options.validateSpec({\n key,\n value: projection[key],\n valueSpec: projectionSpec[key],\n style,\n styleSpec\n }));\n }\n else {\n errors = errors.concat([\n new ValidationError(key, projection[key], `unknown property \"${key}\"`)\n ]);\n }\n }\n return errors;\n}\n\nfunction validateProjectionDefinition(options) {\n const key = options.key;\n let value = options.value;\n value = value instanceof String ? value.valueOf() : value;\n const type = getType(value);\n if (type === 'array' &&\n !isProjectionDefinitionValue(value) &&\n !isPropertyValueSpecification(value)) {\n return [\n new ValidationError(key, value, `projection expected, invalid array ${JSON.stringify(value)} found`)\n ];\n }\n else if (!['array', 'string'].includes(type)) {\n return [\n new ValidationError(key, value, `projection expected, invalid type \"${type}\" found`)\n ];\n }\n return [];\n}\nfunction isPropertyValueSpecification(value) {\n if (['interpolate', 'step', 'literal'].includes(value[0])) {\n return true;\n }\n return false;\n}\nfunction isProjectionDefinitionValue(value) {\n return (Array.isArray(value) &&\n value.length === 3 &&\n typeof value[0] === 'string' &&\n typeof value[1] === 'string' &&\n typeof value[2] === 'number');\n}\n\nfunction isObjectLiteral(anything) {\n return Boolean(anything) && anything.constructor === Object;\n}\n\nfunction validateState(options) {\n if (!isObjectLiteral(options.value)) {\n return [\n new ValidationError(options.key, options.value, `object expected, ${getType(options.value)} found`)\n ];\n }\n return [];\n}\n\nfunction validateFontFaces(options) {\n const key = options.key;\n const value = options.value;\n const validateSpec = options.validateSpec;\n const styleSpec = options.styleSpec;\n const style = options.style;\n if (!isObjectLiteral(value)) {\n return [new ValidationError(key, value, `object expected, ${getType(value)} found`)];\n }\n const errors = [];\n for (const fontName in value) {\n const fontValue = value[fontName];\n const fontValueType = getType(fontValue);\n if (fontValueType === 'string') {\n // Validate as a string URL\n errors.push(...validateString({\n key: `${key}.${fontName}`,\n value: fontValue\n }));\n }\n else if (fontValueType === 'array') {\n // Validate as an array of font face objects\n const fontFaceSpec = {\n url: {\n type: 'string',\n required: true\n },\n 'unicode-range': {\n type: 'array',\n value: 'string'\n }\n };\n for (const [i, fontFace] of fontValue.entries()) {\n errors.push(...validateObject({\n key: `${key}.${fontName}[${i}]`,\n value: fontFace,\n valueSpec: fontFaceSpec,\n styleSpec,\n style,\n validateSpec\n }));\n }\n }\n else {\n errors.push(new ValidationError(`${key}.${fontName}`, fontValue, `string or array expected, ${fontValueType} found`));\n }\n }\n return errors;\n}\n\nconst VALIDATORS = {\n '*'() {\n return [];\n },\n array: validateArray,\n boolean: validateBoolean,\n number: validateNumber,\n color: validateColor,\n constants: validateConstants,\n enum: validateEnum,\n filter: validateFilter,\n function: validateFunction,\n layer: validateLayer,\n object: validateObject,\n source: validateSource,\n light: validateLight,\n sky: validateSky,\n terrain: validateTerrain,\n projection: validateProjection,\n projectionDefinition: validateProjectionDefinition,\n string: validateString,\n formatted: validateFormatted,\n resolvedImage: validateImage,\n padding: validatePadding,\n numberArray: validateNumberArray,\n colorArray: validateColorArray,\n variableAnchorOffsetCollection: validateVariableAnchorOffsetCollection,\n sprite: validateSprite,\n state: validateState,\n fontFaces: validateFontFaces\n};\n/**\n * Main recursive validation function used internally.\n * You should use `validateStyleMin` in the browser or `validateStyle` in node env.\n * @param options - the options object\n * @param options.key - string representing location of validation in style tree. Used only\n * for more informative error reporting.\n * @param options.value - current value from style being evaluated. May be anything from a\n * high level object that needs to be descended into deeper or a simple\n * scalar value.\n * @param options.valueSpec - current spec being evaluated. Tracks value.\n * @param options.styleSpec - current full spec being evaluated.\n * @param options.validateSpec - the validate function itself\n * @param options.style - the style object\n * @param options.objectElementValidators - optional object of functions that will be called\n * @returns an array of errors, or an empty array if no errors are found.\n */\nfunction validate(options) {\n const value = options.value;\n const valueSpec = options.valueSpec;\n const styleSpec = options.styleSpec;\n options.validateSpec = validate;\n if (valueSpec.expression && isFunction$1(unbundle(value))) {\n return validateFunction(options);\n }\n else if (valueSpec.expression && isExpression(deepUnbundle(value))) {\n return validateExpression(options);\n }\n else if (valueSpec.type && VALIDATORS[valueSpec.type]) {\n return VALIDATORS[valueSpec.type](options);\n }\n else {\n const valid = validateObject(extendBy({}, options, {\n valueSpec: valueSpec.type ? styleSpec[valueSpec.type] : valueSpec\n }));\n return valid;\n }\n}\n\nfunction validateGlyphsUrl(options) {\n const value = options.value;\n const key = options.key;\n const errors = validateString(options);\n if (errors.length)\n return errors;\n if (value.indexOf('{fontstack}') === -1) {\n errors.push(new ValidationError(key, value, '\"glyphs\" url must include a \"{fontstack}\" token'));\n }\n if (value.indexOf('{range}') === -1) {\n errors.push(new ValidationError(key, value, '\"glyphs\" url must include a \"{range}\" token'));\n }\n return errors;\n}\n\n/**\n * Validate a MapLibre style against the style specification.\n * Use this when running in the browser.\n *\n * @param style - The style to be validated.\n * @param styleSpec - The style specification to validate against.\n * If omitted, the latest style spec is used.\n * @returns an array of errors, or an empty array if no errors are found.\n * @example\n * const validate = require('@maplibre/maplibre-gl-style-spec/').validateStyleMin;\n * const errors = validate(style);\n */\nfunction validateStyleMin(style, styleSpec = v8Spec) {\n let errors = [];\n errors = errors.concat(validate({\n key: '',\n value: style,\n valueSpec: styleSpec.$root,\n styleSpec,\n style,\n validateSpec: validate,\n objectElementValidators: {\n glyphs: validateGlyphsUrl,\n '*'() {\n return [];\n }\n }\n }));\n if (style['constants']) {\n errors = errors.concat(validateConstants({\n key: 'constants',\n value: style['constants']}));\n }\n return sortErrors(errors);\n}\nvalidateStyleMin.source = wrapCleanErrors(injectValidateSpec(validateSource));\nvalidateStyleMin.sprite = wrapCleanErrors(injectValidateSpec(validateSprite));\nvalidateStyleMin.glyphs = wrapCleanErrors(injectValidateSpec(validateGlyphsUrl));\nvalidateStyleMin.light = wrapCleanErrors(injectValidateSpec(validateLight));\nvalidateStyleMin.sky = wrapCleanErrors(injectValidateSpec(validateSky));\nvalidateStyleMin.terrain = wrapCleanErrors(injectValidateSpec(validateTerrain));\nvalidateStyleMin.state = wrapCleanErrors(injectValidateSpec(validateState));\nvalidateStyleMin.layer = wrapCleanErrors(injectValidateSpec(validateLayer));\nvalidateStyleMin.filter = wrapCleanErrors(injectValidateSpec(validateFilter));\nvalidateStyleMin.paintProperty = wrapCleanErrors(injectValidateSpec(validatePaintProperty));\nvalidateStyleMin.layoutProperty = wrapCleanErrors(injectValidateSpec(validateLayoutProperty));\nfunction injectValidateSpec(validator) {\n return function (options) {\n return validator(Object.assign({}, options, { validateSpec: validate }));\n };\n}\nfunction sortErrors(errors) {\n return [].concat(errors).sort((a, b) => {\n return a.line - b.line;\n });\n}\nfunction wrapCleanErrors(inner) {\n return function (...args) {\n return sortErrors(inner.apply(this, args));\n };\n}\n\n// Note: This regex matches even invalid JSON strings, but since we’re\n// working on the output of `JSON.stringify` we know that only valid strings\n// are present (unless the user supplied a weird `options.indent` but in\n// that case we don’t care since the output would be invalid anyway).\nconst stringOrChar = /(\"(?:[^\\\\\"]|\\\\.)*\")|[:,]/g;\n\nfunction stringify(passedObj, options = {}) {\n const indent = JSON.stringify(\n [1],\n undefined,\n options.indent === undefined ? 2 : options.indent\n ).slice(2, -3);\n\n const maxLength =\n indent === \"\"\n ? Infinity\n : options.maxLength === undefined\n ? 80\n : options.maxLength;\n\n let { replacer } = options;\n\n return (function _stringify(obj, currentIndent, reserved) {\n if (obj && typeof obj.toJSON === \"function\") {\n obj = obj.toJSON();\n }\n\n const string = JSON.stringify(obj, replacer);\n\n if (string === undefined) {\n return string;\n }\n\n const length = maxLength - currentIndent.length - reserved;\n\n if (string.length <= length) {\n const prettified = string.replace(\n stringOrChar,\n (match, stringLiteral) => {\n return stringLiteral || `${match} `;\n }\n );\n if (prettified.length <= length) {\n return prettified;\n }\n }\n\n if (replacer != null) {\n obj = JSON.parse(string);\n replacer = undefined;\n }\n\n if (typeof obj === \"object\" && obj !== null) {\n const nextIndent = currentIndent + indent;\n const items = [];\n let index = 0;\n let start;\n let end;\n\n if (Array.isArray(obj)) {\n start = \"[\";\n end = \"]\";\n const { length } = obj;\n for (; index < length; index++) {\n items.push(\n _stringify(obj[index], nextIndent, index === length - 1 ? 0 : 1) ||\n \"null\"\n );\n }\n } else {\n start = \"{\";\n end = \"}\";\n const keys = Object.keys(obj);\n const { length } = keys;\n for (; index < length; index++) {\n const key = keys[index];\n const keyPart = `${JSON.stringify(key)}: `;\n const value = _stringify(\n obj[key],\n nextIndent,\n keyPart.length + (index === length - 1 ? 0 : 1)\n );\n if (value !== undefined) {\n items.push(keyPart + value);\n }\n }\n }\n\n if (items.length > 0) {\n return [start, indent + items.join(`,\\n${nextIndent}`), end].join(\n `\\n${currentIndent}`\n );\n }\n }\n\n return string;\n })(passedObj, \"\", 0);\n}\n\nfunction sortKeysBy(obj, reference) {\n const result = {};\n for (const key in reference) {\n if (obj[key] !== undefined) {\n result[key] = obj[key];\n }\n }\n for (const key in obj) {\n if (result[key] === undefined) {\n result[key] = obj[key];\n }\n }\n return result;\n}\n/**\n * Format a MapLibre Style. Returns a stringified style with its keys\n * sorted in the same order as the reference style.\n *\n * The optional `space` argument is passed to\n * [`JSON.stringify`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/JSON/stringify)\n * to generate formatted output.\n *\n * If `space` is unspecified, a default of `2` spaces will be used.\n *\n * @private\n * @param {Object} style a MapLibre Style\n * @param {number} [space] space argument to pass to `JSON.stringify`\n * @returns {string} stringified formatted JSON\n * @example\n * var fs = require('fs');\n * var format = require('maplibre-gl-style-spec').format;\n * var style = fs.readFileSync('./source.json', 'utf8');\n * fs.writeFileSync('./dest.json', format(style));\n * fs.writeFileSync('./dest.min.json', format(style, 0));\n */\nfunction format(style, space = 2) {\n style = sortKeysBy(style, v8Spec.$root);\n if (style.layers) {\n style.layers = style.layers.map((layer) => sortKeysBy(layer, v8Spec.layer));\n }\n return stringify(style, { indent: space });\n}\n\nfunction eachLayout(layer, callback) {\n for (const k in layer) {\n if (k.indexOf('layout') === 0) {\n callback(layer[k], k);\n }\n }\n}\nfunction eachPaint(layer, callback) {\n for (const k in layer) {\n if (k.indexOf('paint') === 0) {\n callback(layer[k], k);\n }\n }\n}\nfunction resolveConstant(style, value) {\n if (typeof value === 'string' && value[0] === '@') {\n return resolveConstant(style, style.constants[value]);\n }\n else {\n return value;\n }\n}\nfunction isFunction(value) {\n return Array.isArray(value.stops);\n}\nfunction renameProperty(obj, from, to) {\n obj[to] = obj[from];\n delete obj[from];\n}\nfunction migrateV8(style) {\n style.version = 8;\n // Rename properties, reverse coordinates in source and layers\n eachSource(style, (source) => {\n if (source.type === 'video' && source['url'] !== undefined) {\n renameProperty(source, 'url', 'urls');\n }\n if (source.type === 'video') {\n source.coordinates.forEach((coord) => {\n return coord.reverse();\n });\n }\n });\n eachLayer(style, (layer) => {\n eachLayout(layer, (layout) => {\n if (layout['symbol-min-distance'] !== undefined) {\n renameProperty(layout, 'symbol-min-distance', 'symbol-spacing');\n }\n });\n eachPaint(layer, (paint) => {\n if (paint['background-image'] !== undefined) {\n renameProperty(paint, 'background-image', 'background-pattern');\n }\n if (paint['line-image'] !== undefined) {\n renameProperty(paint, 'line-image', 'line-pattern');\n }\n if (paint['fill-image'] !== undefined) {\n renameProperty(paint, 'fill-image', 'fill-pattern');\n }\n });\n });\n // Inline Constants\n eachProperty(style, { paint: true, layout: true }, (property) => {\n const value = resolveConstant(style, property.value);\n if (isFunction(value)) {\n value.stops.forEach((stop) => {\n stop[1] = resolveConstant(style, stop[1]);\n });\n }\n property.set(value);\n });\n delete style['constants'];\n eachLayer(style, (layer) => {\n // get rid of text-max-size, icon-max-size\n // turn text-size, icon-size into layout properties\n // https://github.com/mapbox/mapbox-gl-style-spec/issues/255\n eachLayout(layer, (layout) => {\n delete layout['text-max-size'];\n delete layout['icon-max-size'];\n });\n eachPaint(layer, (paint) => {\n if (paint['text-size']) {\n if (!layer.layout)\n layer.layout = {};\n layer.layout['text-size'] = paint['text-size'];\n delete paint['text-size'];\n }\n if (paint['icon-size']) {\n if (!layer.layout)\n layer.layout = {};\n layer.layout['icon-size'] = paint['icon-size'];\n delete paint['icon-size'];\n }\n });\n });\n function migrateFontStack(font) {\n function splitAndTrim(string) {\n return string.split(',').map((s) => {\n return s.trim();\n });\n }\n if (Array.isArray(font)) {\n // Assume it's a previously migrated font-array.\n return font;\n }\n else if (typeof font === 'string') {\n return splitAndTrim(font);\n }\n else if (typeof font === 'object') {\n font.stops.forEach((stop) => {\n stop[1] = splitAndTrim(stop[1]);\n });\n return font;\n }\n else {\n throw new Error('unexpected font value');\n }\n }\n eachLayer(style, (layer) => {\n eachLayout(layer, (layout) => {\n if (layout['text-font']) {\n layout['text-font'] = migrateFontStack(layout['text-font']);\n }\n });\n });\n // Reverse order of symbol layers. This is an imperfect migration.\n //\n // The order of a symbol layer in the layers list affects two things:\n // - how it is drawn relative to other layers (like oneway arrows below bridges)\n // - the placement priority compared to other layers\n //\n // It's impossible to reverse the placement priority without breaking the draw order\n // in some cases. This migration only reverses the order of symbol layers that\n // are above all other types of layers.\n //\n // Symbol layers that are at the top of the map preserve their priority.\n // Symbol layers that are below another type (line, fill) of layer preserve their draw order.\n let firstSymbolLayer = 0;\n for (let i = style.layers.length - 1; i >= 0; i--) {\n const layer = style.layers[i];\n if (layer.type !== 'symbol') {\n firstSymbolLayer = i + 1;\n break;\n }\n }\n const symbolLayers = style.layers.splice(firstSymbolLayer);\n symbolLayers.reverse();\n style.layers = style.layers.concat(symbolLayers);\n return style;\n}\n\n/**\n * Migrate the given style object in place to use expressions. Specifically,\n * this will convert (a) \"stop\" functions, and (b) legacy filters to their\n * expression equivalents.\n * @param style The style object to migrate.\n * @returns The migrated style object.\n */\nfunction expressions(style) {\n const converted = [];\n eachLayer(style, (layer) => {\n if (layer.filter) {\n layer.filter = convertFilter(layer.filter);\n }\n });\n eachProperty(style, { paint: true, layout: true }, ({ path, key, value, reference, set }) => {\n if (isExpression(value) || key.endsWith('-transition') || reference === null)\n return;\n if (typeof value === 'object' && !Array.isArray(value)) {\n set(convertFunction(value, reference));\n converted.push(path.join('.'));\n }\n else if (reference.tokens && typeof value === 'string') {\n set(convertTokenString(value));\n }\n });\n return style;\n}\n\n/**\n * Migrate color style values to supported format.\n *\n * @param colorToMigrate Color value to migrate, could be a string or an expression.\n * @returns Color style value in supported format.\n */\nfunction migrateColors(colorToMigrate) {\n return JSON.parse(migrateHslColors(JSON.stringify(colorToMigrate)));\n}\n/**\n * Created to migrate from colors supported by the former CSS color parsing\n * library `csscolorparser` but not compliant with the CSS Color specification,\n * like `hsl(900, 0.15, 90%)`.\n *\n * @param colorToMigrate Serialized color style value.\n * @returns A serialized color style value in which all non-standard hsl color values\n * have been converted to a format that complies with the CSS Color specification.\n *\n * @example\n * migrateHslColors('\"hsl(900, 0.15, 90%)\"'); // returns '\"hsl(900, 15%, 90%)\"'\n * migrateHslColors('\"hsla(900, .15, .9)\"'); // returns '\"hsl(900, 15%, 90%)\"'\n * migrateHslColors('\"hsl(900, 15%, 90%)\"'); // returns '\"hsl(900, 15%, 90%)\"' - no changes\n */\nfunction migrateHslColors(colorToMigrate) {\n return colorToMigrate.replace(/\"hsla?\\((.+?)\\)\"/gi, (match, hslArgs) => {\n const argsMatch = hslArgs.match(/^(.+?)\\s*,\\s*(.+?)\\s*,\\s*(.+?)(?:\\s*,\\s*(.+))?$/i);\n if (argsMatch) {\n let [h, s, l, a] = argsMatch.slice(1);\n [s, l] = [s, l].map((v) => (v.endsWith('%') ? v : `${parseFloat(v) * 100}%`));\n return `\"hsl${typeof a === 'string' ? 'a' : ''}(${[h, s, l, a].filter(Boolean).join(',')})\"`;\n }\n return match;\n });\n}\n\n/**\n * Migrate a Mapbox/MapLibre GL Style to the latest version.\n *\n * @param style - a MapLibre Style\n * @returns a migrated style\n * @example\n * const fs = require('fs');\n * const migrate = require('@maplibre/maplibre-gl-style-spec').migrate;\n * const style = fs.readFileSync('./style.json', 'utf8');\n * fs.writeFileSync('./style.json', JSON.stringify(migrate(style)));\n */\nfunction migrate(style) {\n let migrated = false;\n if (style.version === 7) {\n style = migrateV8(style);\n migrated = true;\n }\n if (style.version === 8) {\n migrated = !!expressions(style);\n migrated = true;\n }\n eachProperty(style, { paint: true, layout: true }, ({ value, reference, set }) => {\n if ((reference === null || reference === void 0 ? void 0 : reference.type) === 'color') {\n set(migrateColors(value));\n }\n });\n if (!migrated) {\n throw new Error(`Cannot migrate from ${style.version}`);\n }\n return style;\n}\n\nconst visibilitySpec = {\n type: 'enum',\n 'property-type': 'data-constant',\n expression: {\n interpolated: false,\n parameters: ['global-state']\n },\n values: { visible: {}, none: {} },\n transition: false,\n default: 'visible'\n};\nclass VisibilityExpressionClass {\n constructor(visibility, globalState) {\n this._globalState = globalState;\n this.setValue(visibility);\n }\n evaluate() {\n var _a;\n return (_a = this._literalValue) !== null && _a !== void 0 ? _a : this._compiledValue.evaluate({});\n }\n setValue(visibility) {\n if (visibility === null ||\n visibility === undefined ||\n visibility === 'visible' ||\n visibility === 'none') {\n this._literalValue = visibility === 'none' ? 'none' : 'visible';\n this._compiledValue = undefined;\n this._globalStateRefs = new Set();\n return;\n }\n const compiled = createExpression(visibility, visibilitySpec, this._globalState);\n if (compiled.result === 'error') {\n this._literalValue = 'visible';\n this._compiledValue = undefined;\n throw new Error(compiled.value.map((err) => `${err.key}: ${err.message}`).join(', '));\n }\n this._literalValue = undefined;\n this._compiledValue = compiled.value;\n this._globalStateRefs = findGlobalStateRefs(compiled.value.expression);\n }\n getGlobalStateRefs() {\n return this._globalStateRefs;\n }\n}\n/**\n * Creates a visibility expression from a visibility specification.\n * @param visibility - the visibility specification, literal or expression\n * @param globalState - the global state object\n * @returns visibility expression object\n */\nfunction createVisibility(visibility, globalState) {\n return new VisibilityExpressionClass(visibility, globalState);\n}\n\nconst v8 = v8Spec;\nconst expression = {\n StyleExpression,\n StylePropertyFunction,\n ZoomConstantExpression,\n ZoomDependentExpression,\n createExpression,\n createPropertyExpression,\n isExpression,\n isExpressionFilter,\n isZoomExpression,\n normalizePropertyExpression\n};\nconst styleFunction = {\n convertFunction,\n createFunction,\n isFunction: isFunction$1\n};\nconst visit = { eachLayer, eachProperty, eachSource };\n\nexport { Color, ColorArray, ColorType, CompoundExpression, EvaluationContext, FormatExpression, Formatted, FormattedSection, FormattedType, Interpolate, Literal, NullType, NumberArray, Padding, ParsingError, ProjectionDefinition, ProjectionDefinitionType, ResolvedImage, Step, StyleExpression, StylePropertyFunction, ValidationError, VariableAnchorOffsetCollection, ZoomConstantExpression, ZoomDependentExpression, classifyRings, convertFilter, convertFunction, createExpression, createFunction, createPropertyExpression, createVisibility as createVisibilityExpression, derefLayers, diff, emptyStyle, expression, expressions$1 as expressions, featureFilter, format, styleFunction as function, groupByLayout, interpolateFactory as interpolates, isExpression, isFunction$1 as isFunction, isZoomExpression, v8Spec as latest, migrate, normalizePropertyExpression, supportsPropertyExpression, typeToString as toString, typeOf, v8, validate, validateStyleMin, visit };\n//# sourceMappingURL=index.mjs.map\n","import {validateStyleMin} from '@maplibre/maplibre-gl-style-spec';\nimport {ErrorEvent} from '../util/evented';\n\nimport type {Evented} from '../util/evented';\n\ntype ValidationError = {\n message: string;\n line: number;\n identifier?: string;\n};\n\nexport type Validator = (a: any) => readonly ValidationError[];\n\ntype ValidateStyle = {\n source: Validator;\n sprite: Validator;\n glyphs: Validator;\n layer: Validator;\n light: Validator;\n sky: Validator;\n terrain: Validator;\n filter: Validator;\n paintProperty: Validator;\n layoutProperty: Validator;\n (b: any, a?: any | null): readonly ValidationError[];\n};\n\nexport const validateStyle = (validateStyleMin as unknown as ValidateStyle);\n\nexport const validateSource = validateStyle.source;\nexport const validateLight = validateStyle.light;\nexport const validateSky = validateStyle.sky;\nexport const validateTerrain = validateStyle.terrain;\nexport const validateFilter = validateStyle.filter;\nexport const validatePaintProperty = validateStyle.paintProperty;\nexport const validateLayoutProperty = validateStyle.layoutProperty;\n\nexport function emitValidationErrors(\n emitter: Evented,\n errors?: ReadonlyArray<{\n message: string;\n identifier?: string;\n }> | null\n): boolean {\n let hasErrors = false;\n if (errors?.length) {\n for (const error of errors) {\n emitter.fire(new ErrorEvent(new Error(error.message)));\n hasErrors = true;\n }\n }\n return hasErrors;\n}\n","/*\nThis file was copied from https://github.com/mapbox/grid-index and was\nmigrated from JavaScript to TypeScript.\n\nCopyright (c) 2016, Mapbox\n\nPermission to use, copy, modify, and/or distribute this software for any purpose\nwith or without fee is hereby granted, provided that the above copyright notice\nand this permission notice appear in all copies.\n\nTHE SOFTWARE IS PROVIDED \"AS IS\" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH\nREGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND\nFITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,\nINDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS\nOF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER\nTORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF\nTHIS SOFTWARE.\n*/\n\nconst NUM_PARAMS = 3;\n\nexport type SerializedGrid = {\n buffer: ArrayBuffer;\n};\n\nexport class TransferableGridIndex {\n cells: number[][];\n arrayBuffer: ArrayBuffer;\n d: number;\n keys: number[];\n bboxes: number[];\n n: number;\n extent: number;\n padding: number;\n scale: any;\n uid: number;\n min: number;\n max: number;\n\n constructor(extent: number | ArrayBuffer, n?: number, padding?: number) {\n const cells = this.cells = [];\n\n if (extent instanceof ArrayBuffer) {\n this.arrayBuffer = extent;\n const array = new Int32Array(this.arrayBuffer);\n extent = array[0];\n n = array[1];\n padding = array[2];\n\n this.d = n + 2 * padding;\n for (let k = 0; k < this.d * this.d; k++) {\n const start = array[NUM_PARAMS + k];\n const end = array[NUM_PARAMS + k + 1];\n cells.push(start === end ? null : array.subarray(start, end));\n }\n const keysOffset = array[NUM_PARAMS + cells.length];\n const bboxesOffset = array[NUM_PARAMS + cells.length + 1];\n this.keys = array.subarray(keysOffset, bboxesOffset) as any as number[];\n this.bboxes = array.subarray(bboxesOffset) as any as number[];\n\n this.insert = this._insertReadonly;\n\n } else {\n this.d = n + 2 * padding;\n for (let i = 0; i < this.d * this.d; i++) {\n cells.push([]);\n }\n this.keys = [];\n this.bboxes = [];\n }\n\n this.n = n;\n this.extent = extent;\n this.padding = padding;\n this.scale = n / extent;\n this.uid = 0;\n\n const p = (padding / n) * extent;\n this.min = -p;\n this.max = extent + p;\n }\n\n insert(key: number, x1: number, y1: number, x2: number, y2: number) {\n this._forEachCell(x1, y1, x2, y2, this._insertCell, this.uid++, undefined, undefined);\n this.keys.push(key);\n this.bboxes.push(x1);\n this.bboxes.push(y1);\n this.bboxes.push(x2);\n this.bboxes.push(y2);\n }\n\n _insertReadonly() {\n throw new Error('Cannot insert into a GridIndex created from an ArrayBuffer.');\n }\n\n _insertCell(x1: number, y1: number, x2: number, y2: number, cellIndex: number, uid: number) {\n this.cells[cellIndex].push(uid);\n }\n\n query(x1: number, y1: number, x2: number, y2: number, intersectionTest?: Function): number[] {\n const min = this.min;\n const max = this.max;\n if (x1 <= min && y1 <= min && max <= x2 && max <= y2 && !intersectionTest) {\n return [...this.keys];\n\n } else {\n const result = [];\n const seenUids = {};\n this._forEachCell(x1, y1, x2, y2, this._queryCell, result, seenUids, intersectionTest);\n return result;\n }\n }\n\n _queryCell(x1: number, y1: number, x2: number, y2:number, cellIndex:number, result, seenUids, intersectionTest: Function) {\n const cell = this.cells[cellIndex];\n if (cell !== null) {\n const keys = this.keys;\n const bboxes = this.bboxes;\n for (const uid of cell) {\n if (seenUids[uid] === undefined) {\n const offset = uid * 4;\n if (intersectionTest ?\n intersectionTest(bboxes[offset + 0], bboxes[offset + 1], bboxes[offset + 2], bboxes[offset + 3]) :\n ((x1 <= bboxes[offset + 2]) &&\n (y1 <= bboxes[offset + 3]) &&\n (x2 >= bboxes[offset + 0]) &&\n (y2 >= bboxes[offset + 1]))) {\n seenUids[uid] = true;\n result.push(keys[uid]);\n } else {\n seenUids[uid] = false;\n }\n }\n }\n }\n }\n\n _forEachCell(x1: number, y1: number, x2:number, y2:number, fn: Function, arg1, arg2, intersectionTest) {\n const cx1 = this._convertToCellCoord(x1);\n const cy1 = this._convertToCellCoord(y1);\n const cx2 = this._convertToCellCoord(x2);\n const cy2 = this._convertToCellCoord(y2);\n for (let x = cx1; x <= cx2; x++) {\n for (let y = cy1; y <= cy2; y++) {\n const cellIndex = this.d * y + x;\n if (intersectionTest && !intersectionTest(\n this._convertFromCellCoord(x),\n this._convertFromCellCoord(y),\n this._convertFromCellCoord(x + 1),\n this._convertFromCellCoord(y + 1))) continue;\n if (fn.call(this, x1, y1, x2, y2, cellIndex, arg1, arg2, intersectionTest)) return;\n }\n }\n }\n\n _convertFromCellCoord (x) {\n return (x - this.padding) / this.scale;\n }\n\n _convertToCellCoord(x) {\n return Math.max(0, Math.min(this.d - 1, Math.floor(x * this.scale) + this.padding));\n }\n\n toArrayBuffer(): ArrayBuffer {\n if (this.arrayBuffer) return this.arrayBuffer;\n\n const cells = this.cells;\n\n const metadataLength = NUM_PARAMS + this.cells.length + 1 + 1;\n let totalCellLength = 0;\n for (const cell of this.cells) {\n totalCellLength += cell.length;\n }\n\n const array = new Int32Array(metadataLength + totalCellLength + this.keys.length + this.bboxes.length);\n array[0] = this.extent;\n array[1] = this.n;\n array[2] = this.padding;\n\n let offset = metadataLength;\n for (let k = 0; k < cells.length; k++) {\n const cell = cells[k];\n array[NUM_PARAMS + k] = offset;\n array.set(cell, offset);\n offset += cell.length;\n }\n\n array[NUM_PARAMS + cells.length] = offset;\n array.set(this.keys, offset);\n offset += this.keys.length;\n\n array[NUM_PARAMS + cells.length + 1] = offset;\n array.set(this.bboxes, offset);\n offset += this.bboxes.length;\n\n return array.buffer;\n }\n\n public static serialize(grid: TransferableGridIndex, transferables?: Transferable[]): SerializedGrid {\n const buffer = grid.toArrayBuffer();\n if (transferables) {\n transferables.push(buffer);\n }\n return {buffer};\n }\n\n public static deserialize(serialized: SerializedGrid): TransferableGridIndex {\n return new TransferableGridIndex(serialized.buffer);\n }\n}\n","import {TransferableGridIndex} from './transferable_grid_index';\nimport {Color, CompoundExpression, expressions, ResolvedImage, StylePropertyFunction,\n StyleExpression, ZoomDependentExpression, ZoomConstantExpression} from '@maplibre/maplibre-gl-style-spec';\nimport {AJAXError} from './ajax';\nimport {isImageBitmap} from './util';\n\n/**\n * A class that is serialized to and json, that can be constructed back to the original class in the worker or in the main thread\n */\ntype SerializedObject = {\n [_: string]: S;\n};\n\n/**\n * All the possible values that can be serialized and sent to and from the worker\n */\nexport type Serialized = null | void | boolean | number | string | Boolean | Number | String | Date | RegExp | ArrayBuffer | ArrayBufferView | ImageData | ImageBitmap | Blob | Serialized[] | SerializedObject;\n\ntype Registry = {\n [_: string]: {\n klass: {\n new (...args: any): any;\n deserialize?: (input: Serialized) => unknown;\n serialize?: (input: any, transferables: Transferable[]) => SerializedObject;\n };\n omit: readonly string[];\n shallow: readonly string[];\n };\n};\n\n/**\n * Register options\n */\ntype RegisterOptions = {\n /**\n * List of properties to omit from serialization (e.g., cached/computed properties)\n */\n omit?: ReadonlyArray;\n /**\n * List of properties that should be serialized by a simple shallow copy, rather than by a recursive call to serialize().\n */\n shallow?: ReadonlyArray;\n};\n\nconst registry: Registry = {};\n\n/**\n * Register the given class as serializable.\n *\n * @param options - the registration options\n */\nexport function register(\n name: string,\n klass: {\n new (...args: any): T;\n },\n options: RegisterOptions = {}\n) {\n if (registry[name]) throw new Error(`${name} is already registered.`);\n ((Object.defineProperty as any))(klass, '_classRegistryKey', {\n value: name,\n writeable: false\n });\n registry[name] = {\n klass,\n omit: options.omit as readonly string[] || [],\n shallow: options.shallow as readonly string[] || []\n };\n}\n\nregister('Object', Object);\nregister('Set', Set);\nregister('TransferableGridIndex', TransferableGridIndex);\n\nregister('Color', Color);\nregister('Error', Error);\nregister('AJAXError', AJAXError);\nregister('ResolvedImage', ResolvedImage);\n\nregister('StylePropertyFunction', StylePropertyFunction);\nregister('StyleExpression', StyleExpression, {omit: ['_evaluator']});\n\nregister('ZoomDependentExpression', ZoomDependentExpression);\nregister('ZoomConstantExpression', ZoomConstantExpression);\nregister('CompoundExpression', CompoundExpression, {omit: ['_evaluate']});\nfor (const name in expressions) {\n if ((expressions[name] as any)._classRegistryKey) continue;\n register(`Expression_${name}`, expressions[name]);\n}\n\nfunction isArrayBuffer(value: any): value is ArrayBuffer {\n return value && typeof ArrayBuffer !== 'undefined' &&\n (value instanceof ArrayBuffer || (value.constructor?.name === 'ArrayBuffer'));\n}\n\nfunction getClassRegistryKey(input: Object|SerializedObject): string {\n const klass = (input.constructor as any);\n return (input as SerializedObject).$name || klass._classRegistryKey;\n}\n\nfunction isRegistered(input: unknown): boolean {\n if (input === null || typeof input !== 'object') {\n return false;\n }\n const classRegistryKey = getClassRegistryKey(input);\n return classRegistryKey && classRegistryKey !== 'Object';\n}\n\nfunction isSerializeHandledByBuiltin(input: unknown) {\n return (!isRegistered(input) && (\n input === null ||\n input === undefined ||\n typeof input === 'boolean' ||\n typeof input === 'number' ||\n typeof input === 'string' ||\n input instanceof Boolean ||\n input instanceof Number ||\n input instanceof String ||\n input instanceof Date ||\n input instanceof RegExp ||\n input instanceof Blob ||\n input instanceof Error ||\n isArrayBuffer(input) ||\n isImageBitmap(input) ||\n ArrayBuffer.isView(input) ||\n input instanceof ImageData)\n );\n}\n\n/**\n * Serialize the given object for transfer to or from a web worker.\n *\n * For non-builtin types, recursively serialize each property (possibly\n * omitting certain properties - see register()), and package the result along\n * with the constructor's `name` so that the appropriate constructor can be\n * looked up in `deserialize()`.\n *\n * If a `transferables` array is provided, add any transferable objects (i.e.,\n * any ArrayBuffers or ArrayBuffer views) to the list. (If a copy is needed,\n * this should happen in the client code, before using serialize().)\n */\nexport function serialize(input: unknown, transferables?: Transferable[] | null): Serialized {\n if (isSerializeHandledByBuiltin(input)) {\n if (isArrayBuffer(input) || isImageBitmap(input)) {\n if (transferables) {\n transferables.push(input);\n }\n }\n if (ArrayBuffer.isView(input)) {\n if (transferables) {\n transferables.push(input.buffer);\n }\n }\n if (input instanceof ImageData) {\n if (transferables) {\n transferables.push(input.data.buffer);\n }\n }\n return input;\n }\n\n if (Array.isArray(input)) {\n const serialized: Serialized[] = [];\n for (const item of input) {\n serialized.push(serialize(item, transferables));\n }\n return serialized;\n }\n\n if (typeof input !== 'object') {\n throw new Error(`can't serialize object of type ${typeof input}`);\n }\n const classRegistryKey = getClassRegistryKey(input);\n if (!classRegistryKey) {\n throw new Error(`can't serialize object of unregistered class ${input.constructor.name}`);\n }\n if (!registry[classRegistryKey]) throw new Error(`${classRegistryKey} is not registered.`);\n const {klass} = registry[classRegistryKey];\n const properties: SerializedObject = klass.serialize ?\n // (Temporary workaround) allow a class to provide static\n // `serialize()` and `deserialize()` methods to bypass the generic\n // approach.\n // This temporary workaround lets us use the generic serialization\n // approach for objects whose members include instances of dynamic\n // StructArray types. Once we refactor StructArray to be static,\n // we can remove this complexity.\n klass.serialize(input, transferables) : {};\n\n if (!klass.serialize) {\n for (const key in input) {\n if (!input.hasOwnProperty(key)) continue;\n if (registry[classRegistryKey].omit.includes(key)) continue;\n const property = input[key];\n properties[key] = registry[classRegistryKey].shallow.includes(key) ?\n property :\n serialize(property, transferables);\n }\n if (input instanceof Error) {\n properties.message = input.message;\n }\n } else {\n if (properties === transferables?.[transferables.length - 1]) {\n throw new Error('statically serialized object won\\'t survive transfer of $name property');\n }\n }\n\n if (properties.$name) {\n throw new Error('$name property is reserved for worker serialization logic.');\n }\n if (classRegistryKey !== 'Object') {\n properties.$name = classRegistryKey;\n }\n\n return properties;\n}\n\nexport function deserialize(input: Serialized): unknown {\n if (isSerializeHandledByBuiltin(input)) {\n return input;\n }\n\n if (Array.isArray(input)) {\n return input.map(deserialize);\n }\n\n if (typeof input !== 'object') {\n throw new Error(`can't deserialize object of type ${typeof input}`);\n }\n const classRegistryKey = getClassRegistryKey(input) || 'Object';\n if (!registry[classRegistryKey]) {\n throw new Error(`can't deserialize unregistered class ${classRegistryKey}`);\n }\n const {klass} = registry[classRegistryKey];\n if (!klass) {\n throw new Error(`can't deserialize unregistered class ${classRegistryKey}`);\n }\n\n if (klass.deserialize) {\n return klass.deserialize(input);\n }\n\n const result = Object.create(klass.prototype);\n\n for (const key of Object.keys(input)) {\n if (key === '$name') continue;\n const value = (input as SerializedObject)[key];\n result[key] = registry[classRegistryKey].shallow.includes(key) ? value : deserialize(value);\n }\n\n return result;\n}\n","export class ZoomHistory {\n lastZoom: number;\n lastFloorZoom: number;\n lastIntegerZoom: number;\n lastIntegerZoomTime: number;\n first: boolean;\n\n constructor() {\n this.first = true;\n }\n\n update(z: number, now: number) {\n const floorZ = Math.floor(z);\n\n if (this.first) {\n this.first = false;\n this.lastIntegerZoom = floorZ;\n this.lastIntegerZoomTime = 0;\n this.lastZoom = z;\n this.lastFloorZoom = floorZ;\n return true;\n }\n\n if (this.lastFloorZoom > floorZ) {\n this.lastIntegerZoom = floorZ + 1;\n this.lastIntegerZoomTime = now;\n } else if (this.lastFloorZoom < floorZ) {\n this.lastIntegerZoom = floorZ;\n this.lastIntegerZoomTime = now;\n }\n\n if (z !== this.lastZoom) {\n this.lastZoom = z;\n this.lastFloorZoom = floorZ;\n return true;\n }\n\n return false;\n }\n}\n","// This file is generated. Edit build/generate-unicode-data.ts, then run `npm run generate-unicode-data`.\n\n/**\n * Returns whether the fallback fonts specified by the\n * `localIdeographFontFamily` map option apply to the given codepoint. \n */\nexport function codePointUsesLocalIdeographFontFamily(codePoint: number): boolean {\n return /[\\u02EA\\u02EB\\u1100-\\u11FF\\u2E80-\\u2FDF\\u3000-\\u30FF\\u3105-\\u312F\\u3131-\\u318E\\u31A0-\\u4DBF\\u4E00-\\uA48C\\uA490-\\uA4C6\\uA960-\\uA97C\\uAC00-\\uD7C6\\uD7CB-\\uD7FB\\uF900-\\uFA6D\\uFA70-\\uFAD9\\uFE10-\\uFE1F\\uFE30-\\uFE4F\\uFF00-\\uFFEF]|\\uD81B[\\uDFE0-\\uDFFF]|[\\uD81C-\\uD822\\uD840-\\uD868\\uD86A-\\uD86D\\uD86F-\\uD872\\uD874-\\uD879\\uD880-\\uD883\\uD885-\\uD88C][\\uDC00-\\uDFFF]|\\uD823[\\uDC00-\\uDCD5\\uDCFF-\\uDD1E\\uDD80-\\uDDF2]|\\uD82B[\\uDFF0-\\uDFFF]|\\uD82C[\\uDC00-\\uDEFB]|\\uD83C[\\uDE00-\\uDEFF]|\\uD869[\\uDC00-\\uDEDF\\uDF00-\\uDFFF]|\\uD86E[\\uDC00-\\uDC1D\\uDC20-\\uDFFF]|\\uD873[\\uDC00-\\uDEAD\\uDEB0-\\uDFFF]|\\uD87A[\\uDC00-\\uDFE0\\uDFF0-\\uDFFF]|\\uD87B[\\uDC00-\\uDE5D]|\\uD87E[\\uDC00-\\uDE1D]|\\uD884[\\uDC00-\\uDF4A\\uDF50-\\uDFFF]|\\uD88D[\\uDC00-\\uDC79]/gim.test(String.fromCodePoint(codePoint));\n}\n\n/**\n * Returns whether the given codepoint participates in ideographic line\n * breaking.\n */\nexport function codePointAllowsIdeographicBreaking(codePoint: number): boolean {\n return /[\\u02EA\\u02EB\\u2E80-\\u2FDF\\u2FF0-\\u303F\\u3041-\\u3096\\u309D-\\u309F\\u30A1-\\u30FA\\u30FD-\\u30FF\\u3105-\\u312F\\u31A0-\\u4DBF\\u4E00-\\uA48C\\uA490-\\uA4C6\\uF900-\\uFA6D\\uFA70-\\uFAD9\\uFE10-\\uFE1F\\uFE30-\\uFE4F\\uFF00-\\uFFEF]|\\uD81B[\\uDFE0-\\uDFFF]|[\\uD81C-\\uD822\\uD840-\\uD868\\uD86A-\\uD86D\\uD86F-\\uD872\\uD874-\\uD879\\uD880-\\uD883\\uD885-\\uD88C][\\uDC00-\\uDFFF]|\\uD823[\\uDC00-\\uDCD5\\uDCFF-\\uDD1E\\uDD80-\\uDDF2]|\\uD82B[\\uDFF0-\\uDFFF]|\\uD82C[\\uDC00-\\uDEFB]|\\uD83C[\\uDE00-\\uDEFF]|\\uD869[\\uDC00-\\uDEDF\\uDF00-\\uDFFF]|\\uD86E[\\uDC00-\\uDC1D\\uDC20-\\uDFFF]|\\uD873[\\uDC00-\\uDEAD\\uDEB0-\\uDFFF]|\\uD87A[\\uDC00-\\uDFE0\\uDFF0-\\uDFFF]|\\uD87B[\\uDC00-\\uDE5D]|\\uD87E[\\uDC00-\\uDE1D]|\\uD884[\\uDC00-\\uDF4A\\uDF50-\\uDFFF]|\\uD88D[\\uDC00-\\uDC79]/gim.test(String.fromCodePoint(codePoint));\n}\n\n/**\n * Returns true if the given Unicode codepoint identifies a character with\n * upright orientation.\n *\n * A character has upright orientation if it is drawn upright (unrotated)\n * whether the line is oriented horizontally or vertically, even if both\n * adjacent characters can be rotated. For example, a Chinese character is\n * always drawn upright. An uprightly oriented character causes an adjacent\n * “neutral” character to be drawn upright as well.\n */\nexport function codePointHasUprightVerticalOrientation(codePoint: number): boolean {\n return /[\\u02EA\\u02EB\\u1100-\\u11FF\\u1400-\\u167F\\u18B0-\\u18F5\\u2E80-\\u2E99\\u2E9B-\\u2EF3\\u2F00-\\u2FD5\\u2FF0-\\u3007\\u3012\\u3013\\u3020-\\u302F\\u3031-\\u303F\\u3041-\\u3096\\u309D-\\u30FB\\u30FD-\\u30FF\\u3105-\\u312F\\u3131-\\u318E\\u3190-\\uA48C\\uA490-\\uA4C6\\uA960-\\uA97C\\uAC00-\\uD7A3\\uD7B0-\\uD7C6\\uD7CB-\\uD7FB\\uF900-\\uFA6D\\uFA70-\\uFAD9\\uFE10-\\uFE1F\\uFE30-\\uFE48\\uFE50-\\uFE57\\uFE5F-\\uFE62\\uFE67-\\uFE6F\\uFF00-\\uFF07\\uFF0A-\\uFF0C\\uFF0E-\\uFF19\\uFF1F-\\uFF3A\\uFF3C\\uFF3E\\uFF40-\\uFF5A\\uFFE0-\\uFFE2\\uFFE4-\\uFFE7]|\\uD802[\\uDD80-\\uDD9F]|\\uD805[\\uDD80-\\uDDFF]|\\uD806[\\uDE00-\\uDEBF]|\\uD811[\\uDC00-\\uDE7F]|\\uD81B[\\uDFE0-\\uDFE4\\uDFF0-\\uDFF6]|[\\uD81C-\\uD822\\uD83D\\uD840-\\uD868\\uD86A-\\uD86D\\uD86F-\\uD872\\uD874-\\uD879\\uD880-\\uD883\\uD885-\\uD88C][\\uDC00-\\uDFFF]|\\uD823[\\uDC00-\\uDCD5\\uDCFF-\\uDD1E\\uDD80-\\uDDF2]|\\uD82B[\\uDFF0-\\uDFF3\\uDFF5-\\uDFFB\\uDFFD\\uDFFE]|\\uD82C[\\uDC00-\\uDD22\\uDD30-\\uDEFB]|\\uD833[\\uDEC0-\\uDFCF]|\\uD834[\\uDC00-\\uDDFF\\uDEE0-\\uDF7F]|\\uD836[\\uDC00-\\uDEAF]|\\uD83C[\\uDC00-\\uDE00\\uDF00-\\uDFFF]|\\uD83E[\\uDD00-\\uDEFF]|\\uD869[\\uDC00-\\uDEDF\\uDF00-\\uDFFF]|\\uD86E[\\uDC00-\\uDC1D\\uDC20-\\uDFFF]|\\uD873[\\uDC00-\\uDEAD\\uDEB0-\\uDFFF]|\\uD87A[\\uDC00-\\uDFE0\\uDFF0-\\uDFFF]|\\uD87B[\\uDC00-\\uDE5D]|\\uD87E[\\uDC00-\\uDE1D]|\\uD884[\\uDC00-\\uDF4A\\uDF50-\\uDFFF]|\\uD88D[\\uDC00-\\uDC79]/gim.test(String.fromCodePoint(codePoint));\n}\n\n/**\n * Returns true if the given Unicode codepoint identifies a character with\n * neutral orientation.\n *\n * A character has neutral orientation if it may be drawn rotated or unrotated\n * when the line is oriented vertically, depending on the orientation of the\n * adjacent characters. For example, along a vertically oriented line, the\n * vulgar fraction ½ is drawn upright among Chinese characters but rotated among\n * Latin letters. A neutrally oriented character does not influence whether an\n * adjacent character is drawn upright or rotated.\n */\nexport function codePointHasNeutralVerticalOrientation(codePoint: number): boolean {\n return /[\\xA7\\xA9\\xAE\\xB1\\xBC-\\xBE\\xD7\\xF7\\u2016\\u2020\\u2021\\u2030\\u2031\\u203B\\u203C\\u2042\\u2047-\\u2049\\u2051\\u2100-\\u218F\\u221E\\u2234\\u2235\\u2300-\\u2307\\u230C-\\u231F\\u2324-\\u2328\\u232B\\u237D-\\u239A\\u23BE-\\u23CD\\u23CF\\u23D1-\\u23DB\\u23E2-\\u2422\\u2424-\\u24FF\\u25A0-\\u2619\\u2620-\\u2767\\u2776-\\u2793\\u2B12-\\u2B2F\\u2B50-\\u2B59\\u2BB8-\\u2BEB\\u3000-\\u303F\\u30A0-\\u30FF\\uE000-\\uF8FF\\uFE30-\\uFE6F\\uFF00-\\uFFEF\\uFFFC\\uFFFD]|[\\uDB80-\\uDBFF][\\uDC00-\\uDFFF]/gim.test(String.fromCodePoint(codePoint));\n}\n\n/**\n * Returns whether the give codepoint is likely to require complex text shaping.\n */\nexport function codePointRequiresComplexTextShaping(codePoint: number): boolean {\n return /[\\u0900-\\u0DFF\\u0F00-\\u109F\\u1780-\\u17FF]/gim.test(String.fromCodePoint(codePoint));\n}\n","import {\n codePointAllowsIdeographicBreaking,\n codePointHasUprightVerticalOrientation,\n codePointHasNeutralVerticalOrientation,\n codePointRequiresComplexTextShaping\n} from '../util/unicode_properties.g';\n\nexport function charIsWhitespace(char: number) {\n return /\\s/u.test(String.fromCodePoint(char));\n}\n\nexport function allowsIdeographicBreaking(chars: string) {\n for (const char of chars) {\n if (!codePointAllowsIdeographicBreaking(char.codePointAt(0))) return false;\n }\n return true;\n}\n\nexport function allowsVerticalWritingMode(chars: string) {\n for (const char of chars) {\n if (codePointHasUprightVerticalOrientation(char.codePointAt(0))) return true;\n }\n return false;\n}\n\nexport function allowsLetterSpacing(chars: string) {\n for (const char of chars) {\n if (!charAllowsLetterSpacing(char.codePointAt(0))) return false;\n }\n return true;\n}\n\n/**\n * Returns a regular expression matching the given script codes, excluding any\n * code that the execution environment lacks support for in regular expressions.\n */\nfunction sanitizedRegExpFromScriptCodes(scriptCodes: string[]): RegExp {\n const supportedPropertyEscapes = scriptCodes.map(code => {\n try {\n return new RegExp(`\\\\p{sc=${code}}`, 'u').source;\n } catch {\n return null;\n }\n }).filter(pe => pe);\n return new RegExp(supportedPropertyEscapes.join('|'), 'u');\n}\n\n/**\n * ISO 15924 script codes of scripts that disallow letter spacing as of Unicode\n * 16.0.0.\n *\n * In general, cursive scripts are incompatible with letter spacing.\n */\nconst cursiveScriptCodes = [\n 'Arab', // Arabic\n 'Dupl', // Duployan\n 'Mong', // Mongolian\n 'Ougr', // Old Uyghur\n 'Syrc', // Syriac\n];\n\nconst cursiveScriptRegExp = sanitizedRegExpFromScriptCodes(cursiveScriptCodes);\n\nexport function charAllowsLetterSpacing(char: number) {\n return !cursiveScriptRegExp.test(String.fromCodePoint(char));\n}\n\n/**\n * Returns true if the given Unicode codepoint identifies a character with\n * rotated orientation.\n *\n * A character has rotated orientation if it is drawn rotated when the line is\n * oriented vertically, even if both adjacent characters are upright. For\n * example, a Latin letter is drawn rotated along a vertical line. A rotated\n * character causes an adjacent “neutral” character to be drawn rotated as well.\n */\nexport function charHasRotatedVerticalOrientation(char: number) {\n return !(codePointHasUprightVerticalOrientation(char) ||\n codePointHasNeutralVerticalOrientation(char));\n}\n\nexport function charInComplexShapingScript(char: number) {\n return /\\p{sc=Arab}/u.test(String.fromCodePoint(char));\n}\n\n/**\n * ISO 15924 script codes of scripts that are primarily written horizontally\n * right-to-left according to Unicode 16.0.0.\n */\nconst rtlScriptCodes = [\n 'Adlm', // Adlam\n 'Arab', // Arabic\n 'Armi', // Imperial Aramaic\n 'Avst', // Avestan\n 'Chrs', // Chorasmian\n 'Cprt', // Cypriot\n 'Egyp', // Egyptian Hieroglyphs\n 'Elym', // Elymaic\n 'Gara', // Garay\n 'Hatr', // Hatran\n 'Hebr', // Hebrew\n 'Hung', // Old Hungarian\n 'Khar', // Kharoshthi\n 'Lydi', // Lydian\n 'Mand', // Mandaic\n 'Mani', // Manichaean\n 'Mend', // Mende Kikakui\n 'Merc', // Meroitic Cursive\n 'Mero', // Meroitic Hieroglyphs\n 'Narb', // Old North Arabian\n 'Nbat', // Nabataean\n 'Nkoo', // NKo\n 'Orkh', // Old Turkic\n 'Palm', // Palmyrene\n 'Phli', // Inscriptional Pahlavi\n 'Phlp', // Psalter Pahlavi\n 'Phnx', // Phoenician\n 'Prti', // Inscriptional Parthian\n 'Rohg', // Hanifi Rohingya\n 'Samr', // Samaritan\n 'Sarb', // Old South Arabian\n 'Sogo', // Old Sogdian\n 'Syrc', // Syriac\n 'Thaa', // Thaana\n 'Todr', // Todhri\n 'Yezi', // Yezidi\n];\n\nconst rtlScriptRegExp = sanitizedRegExpFromScriptCodes(rtlScriptCodes);\n\nexport function charInRTLScript(char: number) {\n return rtlScriptRegExp.test(String.fromCodePoint(char));\n}\n\nexport function charInSupportedScript(char: number, canRenderRTL: boolean) {\n // This is a rough heuristic: whether we \"can render\" a script\n // actually depends on the properties of the font being used\n // and whether differences from the ideal rendering are considered\n // semantically significant.\n\n // Even in Latin script, we \"can't render\" combinations such as the fi\n // ligature, but we don't consider that semantically significant.\n if (!canRenderRTL && charInRTLScript(char)) {\n return false;\n }\n return !codePointRequiresComplexTextShaping(char);\n\n}\n\nexport function stringContainsRTLText(chars: string): boolean {\n for (const char of chars) {\n if (charInRTLScript(char.codePointAt(0))) {\n return true;\n }\n }\n return false;\n}\n\nexport function isStringInSupportedScript(chars: string, canRenderRTL: boolean) {\n for (const char of chars) {\n if (!charInSupportedScript(char.codePointAt(0), canRenderRTL)) {\n return false;\n }\n }\n return true;\n}\n","import {type PluginState, type RTLPluginStatus} from './rtl_text_plugin_status';\n\nexport interface RTLTextPlugin {\n applyArabicShaping: (a: string) => string;\n processBidirectionalText: ((b: string, a: number[]) => string[]);\n processStyledBidirectionalText: ((c: string, b: number[], a: number[]) => Array<[string, number[]]>);\n}\n\nclass RTLWorkerPlugin implements RTLTextPlugin {\n readonly TIMEOUT = 5000;\n\n applyArabicShaping: (a: string) => string = null;\n processBidirectionalText: ((b: string, a: number[]) => string[]) = null;\n processStyledBidirectionalText: ((c: string, b: number[], a: number[]) => Array<[string, number[]]>) = null;\n pluginStatus: RTLPluginStatus = 'unavailable';\n pluginURL: string = null;\n loadScriptResolve: () => void = () => {};\n\n private setState(state: PluginState) {\n this.pluginStatus = state.pluginStatus;\n this.pluginURL = state.pluginURL;\n }\n\n private getState(): PluginState {\n return {\n pluginStatus: this.pluginStatus,\n pluginURL: this.pluginURL\n };\n }\n\n public setMethods(rtlTextPlugin: RTLTextPlugin) {\n if (rtlWorkerPlugin.isParsed()) {\n throw new Error('RTL text plugin already registered.');\n }\n this.applyArabicShaping = rtlTextPlugin.applyArabicShaping;\n this.processBidirectionalText = rtlTextPlugin.processBidirectionalText;\n this.processStyledBidirectionalText = rtlTextPlugin.processStyledBidirectionalText;\n this.loadScriptResolve();\n }\n\n public isParsed(): boolean {\n return this.applyArabicShaping != null &&\n this.processBidirectionalText != null &&\n this.processStyledBidirectionalText != null;\n }\n\n public getRTLTextPluginStatus() {\n return this.pluginStatus;\n }\n\n public async syncState(incomingState: PluginState, importScripts: (url: string) => void): Promise {\n // Parsed plugin cannot be changed, so just return its current state.\n if (this.isParsed()) {\n return this.getState();\n }\n\n if (incomingState.pluginStatus !== 'loading') {\n // simply sync and done\n this.setState(incomingState);\n return incomingState;\n }\n const urlToLoad = incomingState.pluginURL;\n const loadScriptPromise = new Promise((resolve) => {\n this.loadScriptResolve = resolve;\n });\n importScripts(urlToLoad);\n const dontWaitForeverTimeoutPromise = new Promise((resolve) => setTimeout(() => resolve(), this.TIMEOUT));\n await Promise.race([loadScriptPromise, dontWaitForeverTimeoutPromise]);\n const complete = this.isParsed();\n if (complete) {\n const loadedState: PluginState = {\n pluginStatus: 'loaded',\n pluginURL: urlToLoad\n };\n this.setState(loadedState);\n return loadedState;\n }\n\n // error case\n this.setState({\n pluginStatus: 'error',\n pluginURL: ''\n });\n throw new Error(`RTL Text Plugin failed to import scripts from ${urlToLoad}`);\n }\n}\n\nexport const rtlWorkerPlugin = new RTLWorkerPlugin();\n","import {ZoomHistory} from './zoom_history';\nimport {isStringInSupportedScript} from '../util/script_detection';\nimport {rtlWorkerPlugin} from '../source/rtl_text_plugin_worker';\n\nimport type {GlobalProperties, TransitionSpecification} from '@maplibre/maplibre-gl-style-spec';\n\nexport type CrossfadeParameters = {\n fromScale: number;\n toScale: number;\n t: number;\n};\n\n/**\n * @internal\n * A parameter that can be evaluated to a value.\n * It's main purpose is a parameter to expression `evaluate` methods.\n */\nexport class EvaluationParameters implements GlobalProperties {\n zoom: number;\n now: number;\n fadeDuration: number;\n zoomHistory: ZoomHistory;\n transition: TransitionSpecification;\n // has to be an own property of an object to be used in expressions\n // if defined as class method, it'll hidden from operations\n // that iterate over own enumerable properties\n // (i..e spread operator (...), Object.keys(), for...in statement, etc.)\n isSupportedScript: (_: string) => boolean = isSupportedScript;\n\n // \"options\" may also be another EvaluationParameters to copy, see CrossFadedProperty.possiblyEvaluate\n constructor(zoom: number, options?: any) {\n this.zoom = zoom;\n\n if (options) {\n this.now = options.now || 0;\n this.fadeDuration = options.fadeDuration || 0;\n this.zoomHistory = options.zoomHistory || new ZoomHistory();\n this.transition = options.transition || {};\n } else {\n this.now = 0;\n this.fadeDuration = 0;\n this.zoomHistory = new ZoomHistory();\n this.transition = {};\n }\n }\n\n crossFadingFactor() {\n if (this.fadeDuration === 0) {\n return 1;\n } else {\n return Math.min((this.now - this.zoomHistory.lastIntegerZoomTime) / this.fadeDuration, 1);\n }\n }\n\n getCrossfadeParameters(): CrossfadeParameters {\n const z = this.zoom;\n const fraction = z - Math.floor(z);\n const t = this.crossFadingFactor();\n\n return z > this.zoomHistory.lastIntegerZoom ?\n {fromScale: 2, toScale: 1, t: fraction + (1 - fraction) * t} :\n {fromScale: 0.5, toScale: 1, t: 1 - (1 - t) * fraction};\n }\n}\n\nfunction isSupportedScript(str: string): boolean {\n return isStringInSupportedScript(str, rtlWorkerPlugin.getRTLTextPluginStatus() === 'loaded');\n}\n","import {clone, extend, easeCubicInOut} from '../util/util';\nimport {interpolates, type Color, type StylePropertySpecification, normalizePropertyExpression,\n type Feature,\n type FeatureState,\n type StylePropertyExpression,\n type SourceExpression,\n type CompositeExpression, type TransitionSpecification,\n type PropertyValueSpecification} from '@maplibre/maplibre-gl-style-spec';\nimport {register} from '../util/web_worker_transfer';\nimport {EvaluationParameters} from './evaluation_parameters';\n\nimport {type CanonicalTileID} from '../tile/tile_id';\n\ntype TimePoint = number;\n\nexport const TRANSITION_SUFFIX = '-transition';\n\n/**\n * A from-to type\n */\nexport type CrossFaded = {\n to: T;\n from: T;\n};\n\n/**\n * @internal\n * Implementations of the `Property` interface:\n *\n * * Hold metadata about a property that's independent of any specific value: stuff like the type of the value,\n * the default value, etc. This comes from the style specification JSON.\n * * Define behavior that needs to be polymorphic across different properties: \"possibly evaluating\"\n * an input value (see below), and interpolating between two possibly-evaluted values.\n *\n * The type `T` is the fully-evaluated value type (e.g. `number`, `string`, `Color`).\n * The type `R` is the intermediate \"possibly evaluated\" value type. See below.\n *\n * There are two main implementations of the interface -- one for properties that allow data-driven values,\n * and one for properties that don't. There are a few \"special case\" implementations as well: one for properties\n * which cross-fade between two values rather than interpolating, one for `heatmap-color` and `line-gradient`,\n * and one for `light-position`.\n */\nexport interface Property {\n specification: StylePropertySpecification;\n possiblyEvaluate(\n value: PropertyValue,\n parameters: EvaluationParameters,\n canonical?: CanonicalTileID,\n availableImages?: string[]\n ): R;\n interpolate(a: R, b: R, t: number): R;\n}\n\n/**\n * @internal\n * `PropertyValue` represents the value part of a property key-value unit. It's used to represent both\n * paint and layout property values, and regardless of whether or not their property supports data-driven\n * expressions.\n *\n * `PropertyValue` stores the raw input value as seen in a style or a runtime styling API call, i.e. one of the\n * following:\n *\n * * A constant value of the type appropriate for the property\n * * A function which produces a value of that type (but functions are quasi-deprecated in favor of expressions)\n * * An expression which produces a value of that type\n * * \"undefined\"/\"not present\", in which case the property is assumed to take on its default value.\n *\n * In addition to storing the original input value, `PropertyValue` also stores a normalized representation,\n * effectively treating functions as if they are expressions, and constant or default values as if they are\n * (constant) expressions.\n */\nexport class PropertyValue {\n property: Property;\n value: PropertyValueSpecification | void;\n expression: StylePropertyExpression;\n\n constructor(property: Property, value: PropertyValueSpecification | void, globalState: Record) {\n this.property = property;\n this.value = value;\n this.expression = normalizePropertyExpression(value === undefined ? property.specification.default : value, property.specification, globalState);\n }\n\n isDataDriven(): boolean {\n return this.expression.kind === 'source' || this.expression.kind === 'composite';\n }\n\n getGlobalStateRefs(): Set {\n return this.expression.globalStateRefs || new Set();\n }\n\n possiblyEvaluate(\n parameters: EvaluationParameters,\n canonical?: CanonicalTileID,\n availableImages?: string[]\n ): R {\n return this.property.possiblyEvaluate(this, parameters, canonical, availableImages);\n }\n}\n\nexport type TransitionParameters = {\n now: TimePoint;\n transition: TransitionSpecification;\n};\n\n/**\n * @internal\n * Paint properties are _transitionable_: they can change in a fluid manner, interpolating or cross-fading between\n * old and new value. The duration of the transition, and the delay before it begins, is configurable.\n *\n * `TransitionablePropertyValue` is a compositional class that stores both the property value and that transition\n * configuration.\n *\n * A `TransitionablePropertyValue` can calculate the next step in the evaluation chain for paint property values:\n * `TransitioningPropertyValue`.\n */\nclass TransitionablePropertyValue {\n property: Property;\n value: PropertyValue;\n transition: TransitionSpecification | void;\n\n constructor(property: Property, globalState: Record) {\n this.property = property;\n this.value = new PropertyValue(property, undefined, globalState);\n }\n\n transitioned(parameters: TransitionParameters, prior: TransitioningPropertyValue): TransitioningPropertyValue {\n return new TransitioningPropertyValue(this.property, this.value, prior,\n extend({}, parameters.transition, this.transition), parameters.now);\n }\n\n untransitioned(): TransitioningPropertyValue {\n return new TransitioningPropertyValue(this.property, this.value, null, {}, 0);\n }\n}\n\n/**\n * @internal\n * `Transitionable` stores a map of all (property name, `TransitionablePropertyValue`) pairs for paint properties of a\n * given layer type. It can calculate the `TransitioningPropertyValue`s for all of them at once, producing a\n * `Transitioning` instance for the same set of properties.\n */\nexport class Transitionable {\n _properties: Properties;\n _values: {[K in keyof Props]: TransitionablePropertyValue};\n private _globalState: Record;\n\n constructor(properties: Properties, globalState: Record) {\n this._properties = properties;\n this._values = (Object.create(properties.defaultTransitionablePropertyValues));\n this._globalState = globalState;\n }\n\n hasProperty(name: string): boolean {\n return name in this._properties.defaultTransitionablePropertyValues;\n }\n\n getValue(name: S): PropertyValueSpecification | void {\n return clone(this._values[name].value.value);\n }\n\n setValue(name: S, value: PropertyValueSpecification | void) {\n if (!Object.hasOwn(this._values, name)) {\n this._values[name] = new TransitionablePropertyValue(this._values[name].property, this._globalState);\n }\n // Note that we do not _remove_ an own property in the case where a value is being reset\n // to the default: the transition might still be non-default.\n this._values[name].value = new PropertyValue(this._values[name].property, value === null ? undefined : clone(value), this._globalState);\n }\n\n getTransition(name: S): TransitionSpecification | void {\n return clone(this._values[name].transition);\n }\n\n setTransition(name: S, value: TransitionSpecification | void) {\n if (!Object.hasOwn(this._values, name)) {\n this._values[name] = new TransitionablePropertyValue(this._values[name].property, this._globalState);\n }\n this._values[name].transition = clone(value) || undefined;\n }\n\n serialize() {\n const result: any = {};\n for (const property of Object.keys(this._values)) {\n const value = this.getValue(property as keyof Props);\n if (value !== undefined) {\n result[property] = value;\n }\n\n const transition = this.getTransition(property as keyof Props);\n if (transition !== undefined) {\n result[`${property}${TRANSITION_SUFFIX}`] = transition;\n }\n }\n return result;\n }\n\n transitioned(parameters: TransitionParameters, prior: Transitioning): Transitioning {\n const result = new Transitioning(this._properties);\n for (const property of Object.keys(this._values)) {\n result._values[property] = this._values[property].transitioned(parameters, prior._values[property]);\n }\n return result;\n }\n\n untransitioned(): Transitioning {\n const result = new Transitioning(this._properties);\n for (const property of Object.keys(this._values)) {\n result._values[property] = this._values[property].untransitioned();\n }\n return result;\n }\n}\n\n/**\n * @internal\n * `TransitioningPropertyValue` implements the first of two intermediate steps in the evaluation chain of a paint\n * property value. In this step, transitions between old and new values are handled: as long as the transition is in\n * progress, `TransitioningPropertyValue` maintains a reference to the prior value, and interpolates between it and\n * the new value based on the current time and the configured transition duration and delay. The product is the next\n * step in the evaluation chain: the \"possibly evaluated\" result type `R`. See below for more on this concept.\n */\nclass TransitioningPropertyValue {\n property: Property;\n value: PropertyValue;\n prior: TransitioningPropertyValue;\n begin: TimePoint;\n end: TimePoint;\n\n constructor(property: Property,\n value: PropertyValue,\n prior: TransitioningPropertyValue,\n transition: TransitionSpecification,\n now: TimePoint) {\n this.property = property;\n this.value = value;\n this.begin = now + transition.delay || 0;\n this.end = this.begin + transition.duration || 0;\n if (property.specification.transition && (transition.delay || transition.duration)) {\n this.prior = prior;\n }\n }\n\n possiblyEvaluate(\n parameters: EvaluationParameters,\n canonical: CanonicalTileID,\n availableImages: string[]\n ): R {\n const now = parameters.now || 0;\n const finalValue = this.value.possiblyEvaluate(parameters, canonical, availableImages);\n const prior = this.prior;\n if (!prior) {\n // No prior value.\n return finalValue;\n } else if (now > this.end) {\n // Transition from prior value is now complete.\n this.prior = null;\n return finalValue;\n } else if (this.value.isDataDriven()) {\n // Transitions to data-driven properties are not supported.\n // We snap immediately to the data-driven value so that, when we perform layout,\n // we see the data-driven function and can use it to populate vertex buffers.\n this.prior = null;\n return finalValue;\n } else if (now < this.begin) {\n // Transition hasn't started yet.\n return prior.possiblyEvaluate(parameters, canonical, availableImages);\n } else {\n // Interpolate between recursively-calculated prior value and final.\n const t = (now - this.begin) / (this.end - this.begin);\n return this.property.interpolate(prior.possiblyEvaluate(parameters, canonical, availableImages), finalValue, easeCubicInOut(t));\n }\n }\n}\n\n/**\n * @internal\n * `Transitioning` stores a map of all (property name, `TransitioningPropertyValue`) pairs for paint properties of a\n * given layer type. It can calculate the possibly-evaluated values for all of them at once, producing a\n * `PossiblyEvaluated` instance for the same set of properties.\n */\nexport class Transitioning {\n _properties: Properties;\n _values: {[K in keyof Props]: PossiblyEvaluatedPropertyValue};\n\n constructor(properties: Properties) {\n this._properties = properties;\n this._values = (Object.create(properties.defaultTransitioningPropertyValues));\n }\n\n possiblyEvaluate(\n parameters: EvaluationParameters,\n canonical?: CanonicalTileID,\n availableImages?: string[]\n ): PossiblyEvaluated {\n const result = new PossiblyEvaluated(this._properties);\n for (const property of Object.keys(this._values)) {\n result._values[property] = this._values[property].possiblyEvaluate(parameters, canonical, availableImages);\n }\n return result;\n }\n\n hasTransition() {\n for (const property of Object.keys(this._values)) {\n if (this._values[property].prior) {\n return true;\n }\n }\n return false;\n }\n}\n\n// ------- Layout -------\n\n/**\n * Because layout properties are not transitionable, they have a simpler representation and evaluation chain than\n * paint properties: `PropertyValue`s are possibly evaluated, producing possibly evaluated values, which are then\n * fully evaluated.\n *\n * `Layout` stores a map of all (property name, `PropertyValue`) pairs for layout properties of a\n * given layer type. It can calculate the possibly-evaluated values for all of them at once, producing a\n * `PossiblyEvaluated` instance for the same set of properties.\n */\nexport class Layout {\n _properties: Properties;\n _values: {[K in keyof Props]: PropertyValue>};\n private _globalState: Record; // reference to global state\n\n constructor(properties: Properties, globalState: Record) {\n this._properties = properties;\n this._values = (Object.create(properties.defaultPropertyValues));\n this._globalState = globalState;\n }\n\n hasValue(name: S) {\n return this._values[name].value !== undefined;\n }\n\n hasProperty(name: string): boolean {\n return name in this._properties.defaultPropertyValues;\n }\n\n getValue(name: S) {\n return clone(this._values[name].value);\n }\n\n setValue(name: S, value: any) {\n this._values[name] = new PropertyValue(this._values[name].property, value === null ? undefined : clone(value), this._globalState) as any;\n }\n\n serialize() {\n const result: any = {};\n for (const property of Object.keys(this._values)) {\n const value = this.getValue(property as keyof Props);\n if (value !== undefined) {\n result[property] = value;\n }\n }\n return result;\n }\n\n possiblyEvaluate(\n parameters: EvaluationParameters,\n canonical?: CanonicalTileID,\n availableImages?: string[]\n ): PossiblyEvaluated {\n const result = new PossiblyEvaluated(this._properties);\n for (const property of Object.keys(this._values)) {\n result._values[property] = this._values[property].possiblyEvaluate(parameters, canonical, availableImages);\n }\n return result;\n }\n}\n\n// ------- PossiblyEvaluated -------\n\n/**\n * \"Possibly evaluated value\" is an intermediate stage in the evaluation chain for both paint and layout property\n * values. The purpose of this stage is to optimize away unnecessary recalculations for data-driven properties. Code\n * which uses data-driven property values must assume that the value is dependent on feature data, and request that it\n * be evaluated for each feature. But when that property value is in fact a constant or camera function, the calculation\n * will not actually depend on the feature, and we can benefit from returning the prior result of having done the\n * evaluation once, ahead of time, in an intermediate step whose inputs are just the value and \"global\" parameters\n * such as current zoom level.\n *\n * `PossiblyEvaluatedValue` represents the three possible outcomes of this step: if the input value was a constant or\n * camera expression, then the \"possibly evaluated\" result is a constant value. Otherwise, the input value was either\n * a source or composite expression, and we must defer final evaluation until supplied a feature. We separate\n * the source and composite cases because they are handled differently when generating GL attributes, buffers, and\n * uniforms.\n *\n * Note that `PossiblyEvaluatedValue` (and `PossiblyEvaluatedPropertyValue`, below) are _not_ used for properties that\n * do not allow data-driven values. For such properties, we know that the \"possibly evaluated\" result is always a constant\n * scalar value. See below.\n */\ntype PossiblyEvaluatedValue = {\n kind: 'constant';\n value: T;\n} | SourceExpression | CompositeExpression;\n\n/**\n * @internal\n * `PossiblyEvaluatedPropertyValue` is used for data-driven paint and layout property values. It holds a\n * `PossiblyEvaluatedValue` and the `GlobalProperties` that were used to generate it. You're not allowed to supply\n * a different set of `GlobalProperties` when performing the final evaluation because they would be ignored in the\n * case where the input value was a constant or camera function.\n */\nexport class PossiblyEvaluatedPropertyValue {\n property: DataDrivenProperty;\n value: PossiblyEvaluatedValue;\n parameters: EvaluationParameters;\n\n constructor(property: DataDrivenProperty, value: PossiblyEvaluatedValue, parameters: EvaluationParameters) {\n this.property = property;\n this.value = value;\n this.parameters = parameters;\n }\n\n isConstant(): boolean {\n return this.value.kind === 'constant';\n }\n\n constantOr(value: T): T {\n if (this.value.kind === 'constant') {\n return this.value.value;\n } else {\n return value;\n }\n }\n\n evaluate(\n feature: Feature,\n featureState: FeatureState,\n canonical?: CanonicalTileID,\n availableImages?: string[]\n ): T {\n return this.property.evaluate(this.value, this.parameters, feature, featureState, canonical, availableImages);\n }\n}\n\n/**\n * @internal\n * `PossiblyEvaluated` stores a map of all (property name, `R`) pairs for paint or layout properties of a\n * given layer type.\n */\nexport class PossiblyEvaluated {\n _properties: Properties;\n _values: PossibleEvaluatedProps;\n\n constructor(properties: Properties) {\n this._properties = properties;\n this._values = Object.create(properties.defaultPossiblyEvaluatedValues);\n }\n\n get(name: S): PossibleEvaluatedProps[S] {\n return this._values[name];\n }\n}\n\n/**\n * @internal\n * An implementation of `Property` for properties that do not permit data-driven (source or composite) expressions.\n * This restriction allows us to declare statically that the result of possibly evaluating this kind of property\n * is in fact always the scalar type `T`, and can be used without further evaluating the value on a per-feature basis.\n */\nexport class DataConstantProperty implements Property {\n specification: StylePropertySpecification;\n\n constructor(specification: StylePropertySpecification) {\n this.specification = specification;\n }\n\n possiblyEvaluate(value: PropertyValue, parameters: EvaluationParameters): T {\n if (value.isDataDriven()) throw new Error('Value should not be data driven');\n return value.expression.evaluate(parameters);\n }\n\n interpolate(a: T, b: T, t: number): T {\n const interpolationType = this.specification.type as keyof typeof interpolates;\n const interpolationFn = interpolates[interpolationType] as ((from: T, to: T, t: number) => T) | undefined;\n if (interpolationFn) {\n return interpolationFn(a, b, t);\n } else {\n return a;\n }\n }\n}\n\n/**\n * @internal\n * An implementation of `Property` for properties that permit data-driven (source or composite) expressions.\n * The result of possibly evaluating this kind of property is `PossiblyEvaluatedPropertyValue`; obtaining\n * a scalar value `T` requires further evaluation on a per-feature basis.\n */\nexport class DataDrivenProperty implements Property> {\n specification: StylePropertySpecification;\n overrides: any;\n\n constructor(specification: StylePropertySpecification, overrides?: any) {\n this.specification = specification;\n this.overrides = overrides;\n }\n\n possiblyEvaluate(\n value: PropertyValue>,\n parameters: EvaluationParameters,\n canonical?: CanonicalTileID,\n availableImages?: string[]\n ): PossiblyEvaluatedPropertyValue {\n if (value.expression.kind === 'constant' || value.expression.kind === 'camera') {\n return new PossiblyEvaluatedPropertyValue(this, {kind: 'constant', value: value.expression.evaluate(parameters, null, {}, canonical, availableImages)}, parameters);\n } else {\n return new PossiblyEvaluatedPropertyValue(this, value.expression, parameters);\n }\n }\n\n interpolate(\n a: PossiblyEvaluatedPropertyValue,\n b: PossiblyEvaluatedPropertyValue,\n t: number\n ): PossiblyEvaluatedPropertyValue {\n // If either possibly-evaluated value is non-constant, give up: we aren't able to interpolate data-driven values.\n if (a.value.kind !== 'constant' || b.value.kind !== 'constant') {\n return a;\n }\n\n // Special case hack solely for fill-outline-color. The undefined value is subsequently handled in\n // FillStyleLayer.recalculate, which sets fill-outline-color to the fill-color value if the former\n // is a PossiblyEvaluatedPropertyValue containing a constant undefined value. In addition to the\n // return value here, the other source of a PossiblyEvaluatedPropertyValue containing a constant\n // undefined value is the \"default value\" for fill-outline-color held in\n // `Properties.defaultPossiblyEvaluatedValues`, which serves as the prototype of\n // `PossiblyEvaluated._values`.\n if (a.value.value === undefined || b.value.value === undefined) {\n return new PossiblyEvaluatedPropertyValue(this, {kind: 'constant', value: undefined}, a.parameters);\n }\n\n const interpolationType = this.specification.type as keyof typeof interpolates;\n const interpolationFn = interpolates[interpolationType] as ((from: T, to: T, t: number) => T) | undefined;\n if (interpolationFn) {\n const interpolatedValue = interpolationFn(a.value.value, b.value.value, t);\n return new PossiblyEvaluatedPropertyValue(this, {kind: 'constant', value: interpolatedValue}, a.parameters);\n } else {\n return a;\n }\n }\n\n evaluate(\n value: PossiblyEvaluatedValue,\n parameters: EvaluationParameters,\n feature: Feature,\n featureState: FeatureState,\n canonical?: CanonicalTileID,\n availableImages?: string[]\n ): T {\n if (value.kind === 'constant') {\n return value.value;\n } else {\n return value.evaluate(parameters, feature, featureState, canonical, availableImages);\n }\n }\n}\n\n/**\n * @internal\n * An implementation of `Property` for data driven `line-pattern` which are transitioned by cross-fading\n * rather than interpolation.\n */\n\nexport class CrossFadedDataDrivenProperty extends DataDrivenProperty> {\n\n possiblyEvaluate(\n value: PropertyValue, PossiblyEvaluatedPropertyValue>>,\n parameters: EvaluationParameters,\n canonical?: CanonicalTileID,\n availableImages?: string[]\n ): PossiblyEvaluatedPropertyValue> {\n if (value.value === undefined) {\n return new PossiblyEvaluatedPropertyValue(this, {kind: 'constant', value: undefined}, parameters);\n } else if (value.expression.kind === 'constant') {\n const evaluatedValue = value.expression.evaluate(parameters, null, {}, canonical, availableImages);\n const isImageExpression = value.property.specification.type as any === 'resolvedImage';\n const constantValue = isImageExpression && typeof evaluatedValue !== 'string' ? evaluatedValue.name : evaluatedValue;\n const constant = this._calculate(constantValue, constantValue, constantValue, parameters);\n return new PossiblyEvaluatedPropertyValue(this, {kind: 'constant', value: constant}, parameters);\n } else if (value.expression.kind === 'camera') {\n const cameraVal = this._calculate(\n value.expression.evaluate({zoom: parameters.zoom - 1.0}),\n value.expression.evaluate({zoom: parameters.zoom}),\n value.expression.evaluate({zoom: parameters.zoom + 1.0}),\n parameters);\n return new PossiblyEvaluatedPropertyValue(this, {kind: 'constant', value: cameraVal}, parameters);\n } else {\n // source or composite expression\n return new PossiblyEvaluatedPropertyValue(this, value.expression, parameters);\n }\n }\n\n evaluate(\n value: PossiblyEvaluatedValue>,\n globals: EvaluationParameters,\n feature: Feature,\n featureState: FeatureState,\n canonical?: CanonicalTileID,\n availableImages?: string[]\n ): CrossFaded {\n if (value.kind === 'source') {\n const constant = value.evaluate(globals, feature, featureState, canonical, availableImages);\n return this._calculate(constant, constant, constant, globals);\n } else if (value.kind === 'composite') {\n return this._calculate(\n value.evaluate({zoom: Math.floor(globals.zoom) - 1.0}, feature, featureState),\n value.evaluate({zoom: Math.floor(globals.zoom)}, feature, featureState),\n value.evaluate({zoom: Math.floor(globals.zoom) + 1.0}, feature, featureState),\n globals);\n } else {\n return value.value;\n }\n }\n\n _calculate(min: T, mid: T, max: T, parameters: EvaluationParameters): CrossFaded {\n const z = parameters.zoom;\n return z > parameters.zoomHistory.lastIntegerZoom ? {from: min, to: mid} : {from: max, to: mid};\n }\n\n interpolate(a: PossiblyEvaluatedPropertyValue>): PossiblyEvaluatedPropertyValue> {\n return a;\n }\n}\n/**\n * @internal\n * An implementation of `Property` for `*-pattern` and `line-dasharray`, which are transitioned by cross-fading\n * rather than interpolation.\n */\nexport class CrossFadedProperty implements Property> {\n specification: StylePropertySpecification;\n\n constructor(specification: StylePropertySpecification) {\n this.specification = specification;\n }\n\n possiblyEvaluate(\n value: PropertyValue>,\n parameters: EvaluationParameters,\n canonical?: CanonicalTileID,\n availableImages?: string[]\n ): CrossFaded {\n if (value.value === undefined) {\n return undefined;\n } else if (value.expression.kind === 'constant') {\n const constant = value.expression.evaluate(parameters, null, {}, canonical, availableImages);\n return this._calculate(constant, constant, constant, parameters);\n } else {\n return this._calculate(\n value.expression.evaluate(new EvaluationParameters(Math.floor(parameters.zoom - 1.0), parameters)),\n value.expression.evaluate(new EvaluationParameters(Math.floor(parameters.zoom), parameters)),\n value.expression.evaluate(new EvaluationParameters(Math.floor(parameters.zoom + 1.0), parameters)),\n parameters);\n }\n }\n\n _calculate(min: T, mid: T, max: T, parameters: EvaluationParameters): CrossFaded {\n const z = parameters.zoom;\n return z > parameters.zoomHistory.lastIntegerZoom ? {from: min, to: mid} : {from: max, to: mid};\n }\n\n interpolate(a?: CrossFaded | null): CrossFaded {\n return a;\n }\n}\n\n/**\n * @internal\n * An implementation of `Property` for `heatmap-color` and `line-gradient`. Interpolation is a no-op, and\n * evaluation returns a boolean value in order to indicate its presence, but the real\n * evaluation happens in StyleLayer classes.\n */\n\nexport class ColorRampProperty implements Property {\n specification: StylePropertySpecification;\n\n constructor(specification: StylePropertySpecification) {\n this.specification = specification;\n }\n\n possiblyEvaluate(\n value: PropertyValue,\n parameters: EvaluationParameters,\n canonical?: CanonicalTileID,\n availableImages?: string[]\n ): boolean {\n return !!value.expression.evaluate(parameters, null, {}, canonical, availableImages);\n }\n\n interpolate(): boolean { return false; }\n}\n\n/**\n * @internal\n * `Properties` holds objects containing default values for the layout or paint property set of a given\n * layer type. These objects are immutable, and they are used as the prototypes for the `_values` members of\n * `Transitionable`, `Transitioning`, `Layout`, and `PossiblyEvaluated`. This allows these classes to avoid\n * doing work in the common case where a property has no explicit value set and should be considered to take\n * on the default value: using `for (const property of Object.keys(this._values))`, they can iterate over\n * only the _own_ properties of `_values`, skipping repeated calculation of transitions and possible/final\n * evaluations for defaults, the result of which will always be the same.\n */\nexport class Properties {\n properties: Props;\n defaultPropertyValues: {[K in keyof Props]: PropertyValue};\n defaultTransitionablePropertyValues: {[K in keyof Props]: TransitionablePropertyValue};\n defaultTransitioningPropertyValues: {[K in keyof Props]: TransitioningPropertyValue};\n defaultPossiblyEvaluatedValues: {[K in keyof Props]: PossiblyEvaluatedPropertyValue};\n overridableProperties: string[];\n\n constructor(properties: Props) {\n this.properties = properties;\n this.defaultPropertyValues = ({} as any);\n this.defaultTransitionablePropertyValues = ({} as any);\n this.defaultTransitioningPropertyValues = ({} as any);\n this.defaultPossiblyEvaluatedValues = ({} as any);\n this.overridableProperties = ([] as any);\n\n for (const property in properties) {\n const prop = properties[property] as any;\n if (prop.specification.overridable) {\n this.overridableProperties.push(property);\n }\n const defaultPropertyValue = this.defaultPropertyValues[property] =\n new PropertyValue(prop, undefined, undefined);\n const defaultTransitionablePropertyValue = this.defaultTransitionablePropertyValues[property] =\n new TransitionablePropertyValue(prop, undefined);\n this.defaultTransitioningPropertyValues[property] =\n defaultTransitionablePropertyValue.untransitioned();\n this.defaultPossiblyEvaluatedValues[property] =\n defaultPropertyValue.possiblyEvaluate({} as any);\n }\n }\n}\n\nregister('DataDrivenProperty', DataDrivenProperty);\nregister('DataConstantProperty', DataConstantProperty);\nregister('CrossFadedDataDrivenProperty', CrossFadedDataDrivenProperty);\nregister('CrossFadedProperty', CrossFadedProperty);\nregister('ColorRampProperty', ColorRampProperty);\n","import {filterObject} from '../util/util';\n\nimport {createVisibilityExpression, featureFilter, latest as styleSpec, supportsPropertyExpression} from '@maplibre/maplibre-gl-style-spec';\nimport {\n validateStyle,\n validateLayoutProperty,\n validatePaintProperty,\n emitValidationErrors\n} from './validate_style';\nimport {Evented, ErrorEvent} from '../util/evented';\nimport {Layout, Transitionable, type Transitioning, type Properties, PossiblyEvaluated, PossiblyEvaluatedPropertyValue, TRANSITION_SUFFIX} from './properties';\n\nimport type {Bucket, BucketParameters} from '../data/bucket';\nimport type Point from '@mapbox/point-geometry';\nimport type {\n FeatureFilter,\n FeatureState,\n LayerSpecification,\n FilterSpecification,\n VisibilitySpecification,\n VisibilityExpression\n} from '@maplibre/maplibre-gl-style-spec';\nimport type {TransitionParameters, PropertyValue} from './properties';\nimport {type EvaluationParameters} from './evaluation_parameters';\nimport type {CrossfadeParameters} from './evaluation_parameters';\n\nimport type {IReadonlyTransform} from '../geo/transform_interface';\nimport type {CustomLayerInterface} from './style_layer/custom_style_layer';\nimport type {Map} from '../ui/map';\nimport type {StyleSetterOptions} from './style';\nimport {type mat4} from 'gl-matrix';\nimport type {UnwrappedTileID} from '../tile/tile_id';\nimport type {VectorTileFeatureLike} from '@maplibre/vt-pbf';\n\nexport type QueryIntersectsFeatureParams = {\n /**\n * The geometry to check intersection with.\n * This geometry is in tile coordinates.\n */\n queryGeometry: Point[];\n /**\n * The feature to allow expression evaluation.\n */\n feature: VectorTileFeatureLike;\n /**\n * The feature state to allow expression evaluation.\n */\n featureState: FeatureState;\n /**\n * The geometry of the feature.\n * This geometry is in tile coordinates.\n */\n geometry: Point[][];\n /**\n * The current zoom level.\n */\n zoom: number;\n /**\n * The transform to convert from tile coordinates to pixels.\n */\n transform: IReadonlyTransform;\n /**\n * The number of pixels per tile unit.\n */\n pixelsToTileUnits: number;\n /**\n * The matrix to convert from tile coordinates to pixel coordinates.\n * The pixel coordinates are relative to the center of the screen.\n */\n pixelPosMatrix: mat4;\n /**\n * The unwrapped tile ID for the tile being queried.\n */\n unwrappedTileID: UnwrappedTileID;\n /**\n * A function to get the elevation of a point in tile coordinates.\n */\n getElevation: undefined | ((x: number, y: number) => number);\n};\n\nconst ERROR_PAINT_NOT_LAYOUT = ' is a PAINT property not a LAYOUT property. Use get/setPaintProperty instead?';\nconst ERROR_LAYOUT_NOT_PAINT = ' is a LAYOUT property not a PAINT property. Use get/setLayoutProperty instead?';\n\n/**\n * A base class for style layers\n */\nexport abstract class StyleLayer extends Evented {\n id: string;\n metadata: unknown;\n type: LayerSpecification['type'] | CustomLayerInterface['type'];\n source: string;\n sourceLayer: string;\n minzoom: number;\n maxzoom: number;\n filter: FilterSpecification | void;\n visibility: VisibilitySpecification;\n private _evaluatedVisibility: 'visible' | 'none' | void;\n\n _crossfadeParameters: CrossfadeParameters;\n\n _unevaluatedLayout: Layout;\n readonly layout: unknown;\n\n _transitionablePaint: Transitionable;\n _transitioningPaint: Transitioning;\n readonly paint: unknown;\n\n _featureFilter: FeatureFilter;\n\n _visibilityExpression: VisibilityExpression;\n\n readonly onAdd: ((map: Map) => void);\n readonly onRemove: ((map: Map) => void);\n\n queryRadius?(bucket: Bucket): number;\n queryIntersectsFeature?(params: QueryIntersectsFeatureParams): boolean | number;\n createBucket?(parameters: BucketParameters): Bucket;\n\n private _globalState: Record; // reference to global state\n\n constructor(layer: LayerSpecification | CustomLayerInterface, properties: Readonly<{\n layout?: Properties;\n paint?: Properties;\n }>, globalState: Record) {\n super();\n\n this.id = layer.id;\n this.type = layer.type;\n this._globalState = globalState;\n this._featureFilter = {filter: () => true, needGeometry: false, getGlobalStateRefs: () => new Set()};\n this._visibilityExpression = createVisibilityExpression(this.visibility, globalState);\n\n if (layer.type === 'custom') return;\n\n layer = (layer as any as LayerSpecification);\n\n this.metadata = layer.metadata;\n this.minzoom = layer.minzoom;\n this.maxzoom = layer.maxzoom;\n\n if (layer.type !== 'background') {\n this.source = layer.source;\n this.sourceLayer = layer['source-layer'];\n this.filter = layer.filter;\n this._featureFilter = featureFilter(layer.filter, globalState);\n }\n\n if (properties.layout) {\n this._unevaluatedLayout = new Layout(properties.layout, globalState);\n }\n\n if (properties.paint) {\n this._transitionablePaint = new Transitionable(properties.paint, globalState);\n\n for (const property in layer.paint) {\n this.setPaintProperty(property, layer.paint[property], {validate: false});\n }\n for (const property in layer.layout) {\n this.setLayoutProperty(property, layer.layout[property], {validate: false});\n }\n\n this._transitioningPaint = this._transitionablePaint.untransitioned();\n //$FlowFixMe\n this.paint = new PossiblyEvaluated(properties.paint);\n }\n }\n\n setFilter(filter: FilterSpecification | void) {\n this.filter = filter;\n this._featureFilter = featureFilter(filter, this._globalState);\n }\n\n getCrossfadeParameters() {\n return this._crossfadeParameters;\n }\n\n getLayoutProperty(name: string) {\n if (name === 'visibility') {\n return this.visibility;\n }\n if (this._transitionablePaint?.hasProperty(name)) {\n throw new Error(name + ERROR_PAINT_NOT_LAYOUT);\n }\n if (!this._unevaluatedLayout) {\n throw new Error(`Cannot get layout property \"${name}\" on layer type \"${this.type}\" which has no layout properties.`);\n }\n return this._unevaluatedLayout.getValue(name);\n }\n\n /**\n * Get list of global state references that are used within layout or filter properties.\n * This is used to determine if layer source need to be reloaded when global state property changes.\n *\n */\n getLayoutAffectingGlobalStateRefs(): Set {\n const globalStateRefs = new Set();\n\n for (const globalStateRef of this._visibilityExpression.getGlobalStateRefs()) {\n globalStateRefs.add(globalStateRef);\n }\n\n if (this._unevaluatedLayout) {\n for (const propertyName in this._unevaluatedLayout._values) {\n const value = this._unevaluatedLayout._values[propertyName];\n\n for (const globalStateRef of value.getGlobalStateRefs()) {\n globalStateRefs.add(globalStateRef);\n }\n }\n }\n\n for (const globalStateRef of this._featureFilter.getGlobalStateRefs()) {\n globalStateRefs.add(globalStateRef);\n }\n\n return globalStateRefs;\n }\n\n /**\n * Get list of global state references that are used within paint properties.\n * This is used to determine if layer needs to be repainted when global state property changes.\n *\n */\n getPaintAffectingGlobalStateRefs(): globalThis.Map> {\n const globalStateRefs = new globalThis.Map>();\n\n if (this._transitionablePaint) {\n for (const propertyName in this._transitionablePaint._values) {\n const value = this._transitionablePaint._values[propertyName].value;\n\n for (const globalStateRef of value.getGlobalStateRefs()) {\n const properties = globalStateRefs.get(globalStateRef) ?? [];\n properties.push({name: propertyName, value: value.value});\n globalStateRefs.set(globalStateRef, properties);\n }\n }\n }\n\n return globalStateRefs;\n }\n\n /**\n * Get list of global state references that are used within visibility expression.\n * This is used to determine if layer visibility needs to be updated when global state property changes.\n */\n getVisibilityAffectingGlobalStateRefs() {\n return this._visibilityExpression.getGlobalStateRefs();\n }\n\n setLayoutProperty(name: string, value: any, options: StyleSetterOptions = {}) {\n if (name === 'visibility') {\n this.visibility = value;\n this._visibilityExpression.setValue(value);\n this.recalculateVisibility();\n return;\n }\n\n if (this._transitionablePaint?.hasProperty(name)) {\n this.fire(new ErrorEvent(new Error(name + ERROR_PAINT_NOT_LAYOUT)));\n return;\n }\n\n if (value !== null && value !== undefined && this._validate(validateLayoutProperty, `layers.${this.id}.layout.${name}`, name, value, options)) return;\n\n this._unevaluatedLayout.setValue(name, value);\n }\n\n getPaintProperty(name: string) {\n if (name.endsWith(TRANSITION_SUFFIX)) {\n const baseName = name.slice(0, -TRANSITION_SUFFIX.length);\n if (baseName === 'visibility' || this._unevaluatedLayout?.hasProperty(baseName)) {\n throw new Error(name + ERROR_LAYOUT_NOT_PAINT);\n }\n return this._transitionablePaint.getTransition(baseName);\n } else {\n if (name === 'visibility' || this._unevaluatedLayout?.hasProperty(name)) {\n throw new Error(name + ERROR_LAYOUT_NOT_PAINT);\n }\n return this._transitionablePaint.getValue(name);\n }\n }\n\n setPaintProperty(name: string, value: unknown, options: StyleSetterOptions = {}) {\n if (name === 'visibility' || (this._unevaluatedLayout?.hasProperty(name))) {\n this.fire(new ErrorEvent(new Error(name + ERROR_LAYOUT_NOT_PAINT)));\n return false;\n }\n\n if (value !== null && value !== undefined && this._validate(validatePaintProperty, `layers.${this.id}.paint.${name}`, name, value, options)) return false;\n\n if (name.endsWith(TRANSITION_SUFFIX)) {\n this._transitionablePaint.setTransition(name.slice(0, -TRANSITION_SUFFIX.length), (value as any) || undefined);\n return false;\n } else {\n const transitionable = this._transitionablePaint._values[name];\n const isCrossFadedProperty = transitionable.property.specification['property-type'] === 'cross-faded-data-driven';\n const wasDataDriven = transitionable.value.isDataDriven();\n const oldValue = transitionable.value;\n\n this._transitionablePaint.setValue(name, value);\n this._handleSpecialPaintPropertyUpdate(name);\n\n const newValue = this._transitionablePaint._values[name].value;\n const isDataDriven = newValue.isDataDriven();\n\n // if a cross-faded value is changed, we need to make sure the new icons get added to each tile's iconAtlas\n // so a call to _updateLayer is necessary, and we return true from this function so it gets called in\n // Style.setPaintProperty\n return isDataDriven || wasDataDriven || isCrossFadedProperty || this._handleOverridablePaintPropertyUpdate(name, oldValue, newValue);\n }\n }\n\n _handleSpecialPaintPropertyUpdate(_: string) {\n // No-op; can be overridden by derived classes.\n }\n\n // eslint-disable-next-line @typescript-eslint/no-unused-vars\n _handleOverridablePaintPropertyUpdate(name: string, oldValue: PropertyValue, newValue: PropertyValue): boolean {\n // No-op; can be overridden by derived classes.\n return false;\n }\n\n isHidden(zoom: number = this.minzoom, roundMinZoom: boolean = false) {\n if (this.minzoom && zoom < (roundMinZoom ? Math.floor(this.minzoom) : this.minzoom)) return true;\n if (this.maxzoom && zoom >= this.maxzoom) return true;\n return this._evaluatedVisibility === 'none';\n }\n\n updateTransitions(parameters: TransitionParameters) {\n this._transitioningPaint = this._transitionablePaint.transitioned(parameters, this._transitioningPaint);\n }\n\n hasTransition() {\n return this._transitioningPaint.hasTransition();\n }\n\n recalculateVisibility() {\n this._evaluatedVisibility = this._visibilityExpression.evaluate();\n }\n\n recalculate(parameters: EvaluationParameters, availableImages: string[]) {\n if (parameters.getCrossfadeParameters) {\n this._crossfadeParameters = parameters.getCrossfadeParameters();\n }\n\n if (this._unevaluatedLayout) {\n (this as any).layout = this._unevaluatedLayout.possiblyEvaluate(parameters, undefined, availableImages);\n }\n\n (this as any).paint = this._transitioningPaint.possiblyEvaluate(parameters, undefined, availableImages);\n }\n\n serialize(): LayerSpecification {\n const output: LayerSpecification = {\n 'id': this.id,\n 'type': this.type as LayerSpecification['type'],\n 'source': this.source,\n 'source-layer': this.sourceLayer,\n 'metadata': this.metadata,\n 'minzoom': this.minzoom,\n 'maxzoom': this.maxzoom,\n 'filter': this.filter as FilterSpecification,\n 'layout': this._unevaluatedLayout?.serialize(),\n 'paint': this._transitionablePaint?.serialize()\n };\n\n if (this.visibility) {\n output.layout ||= {};\n output.layout.visibility = this.visibility;\n }\n\n return filterObject(output, (value, key) => {\n return value !== undefined &&\n !(key === 'layout' && !Object.keys(value).length) &&\n !(key === 'paint' && !Object.keys(value).length);\n });\n }\n\n _validate(validate: Function, key: string, name: string, value: unknown, options: StyleSetterOptions = {}) {\n if (options?.validate === false) {\n return false;\n }\n return emitValidationErrors(this, validate.call(validateStyle, {\n key,\n layerType: this.type,\n objectKey: name,\n value,\n styleSpec,\n // Workaround for https://github.com/mapbox/mapbox-gl-js/issues/2407\n style: {glyphs: true, sprite: true}\n }));\n }\n\n is3D() {\n return false;\n }\n\n isTileClipped() {\n return false;\n }\n\n hasOffscreenPass() {\n return false;\n }\n\n resize() {\n // noop\n }\n\n isStateDependent() {\n for (const property in (this as any).paint._values) {\n const value = (this as any).paint.get(property);\n if (!(value instanceof PossiblyEvaluatedPropertyValue) || !supportsPropertyExpression(value.property.specification)) {\n continue;\n }\n\n if ((value.value.kind === 'source' || value.value.kind === 'composite') &&\n value.value.isStateDependent) {\n return true;\n }\n }\n return false;\n }\n}\n","// This file is generated. Edit build/generate-style-code.ts, then run 'npm run codegen'.\n/* eslint-disable */\n\nimport {latest as styleSpec} from '@maplibre/maplibre-gl-style-spec';\n\nimport {\n Properties,\n DataConstantProperty,\n DataDrivenProperty,\n CrossFadedDataDrivenProperty,\n CrossFadedProperty,\n ColorRampProperty,\n PossiblyEvaluatedPropertyValue,\n CrossFaded\n} from '../properties';\n\nimport type {Color, Formatted, Padding, NumberArray, ColorArray, ResolvedImage, VariableAnchorOffsetCollection} from '@maplibre/maplibre-gl-style-spec';\nimport {StylePropertySpecification} from '@maplibre/maplibre-gl-style-spec';\n\n\nexport type RasterPaintProps = {\n \"raster-opacity\": DataConstantProperty,\n \"raster-hue-rotate\": DataConstantProperty,\n \"raster-brightness-min\": DataConstantProperty,\n \"raster-brightness-max\": DataConstantProperty,\n \"raster-saturation\": DataConstantProperty,\n \"raster-contrast\": DataConstantProperty,\n \"resampling\": DataConstantProperty<\"linear\" | \"nearest\">,\n \"raster-resampling\": DataConstantProperty<\"linear\" | \"nearest\">,\n \"raster-fade-duration\": DataConstantProperty,\n};\n\nexport type RasterPaintPropsPossiblyEvaluated = {\n \"raster-opacity\": number,\n \"raster-hue-rotate\": number,\n \"raster-brightness-min\": number,\n \"raster-brightness-max\": number,\n \"raster-saturation\": number,\n \"raster-contrast\": number,\n \"resampling\": \"linear\" | \"nearest\",\n \"raster-resampling\": \"linear\" | \"nearest\",\n \"raster-fade-duration\": number,\n};\n\nlet paint: Properties;\nconst getPaint = () => paint = paint || new Properties({\n \"raster-opacity\": new DataConstantProperty(styleSpec[\"paint_raster\"][\"raster-opacity\"] as any as StylePropertySpecification),\n \"raster-hue-rotate\": new DataConstantProperty(styleSpec[\"paint_raster\"][\"raster-hue-rotate\"] as any as StylePropertySpecification),\n \"raster-brightness-min\": new DataConstantProperty(styleSpec[\"paint_raster\"][\"raster-brightness-min\"] as any as StylePropertySpecification),\n \"raster-brightness-max\": new DataConstantProperty(styleSpec[\"paint_raster\"][\"raster-brightness-max\"] as any as StylePropertySpecification),\n \"raster-saturation\": new DataConstantProperty(styleSpec[\"paint_raster\"][\"raster-saturation\"] as any as StylePropertySpecification),\n \"raster-contrast\": new DataConstantProperty(styleSpec[\"paint_raster\"][\"raster-contrast\"] as any as StylePropertySpecification),\n \"resampling\": new DataConstantProperty(styleSpec[\"paint_raster\"][\"resampling\"] as any as StylePropertySpecification),\n \"raster-resampling\": new DataConstantProperty(styleSpec[\"paint_raster\"][\"raster-resampling\"] as any as StylePropertySpecification),\n \"raster-fade-duration\": new DataConstantProperty(styleSpec[\"paint_raster\"][\"raster-fade-duration\"] as any as StylePropertySpecification),\n});\n\nexport default ({ get paint() { return getPaint() } });","import {StyleLayer} from '../style_layer';\n\nimport properties, {type RasterPaintPropsPossiblyEvaluated} from './raster_style_layer_properties.g';\nimport {type Transitionable, type Transitioning, type PossiblyEvaluated} from '../properties';\n\nimport type {RasterPaintProps} from './raster_style_layer_properties.g';\nimport type {LayerSpecification} from '@maplibre/maplibre-gl-style-spec';\n\nexport const isRasterStyleLayer = (layer: StyleLayer): layer is RasterStyleLayer => layer.type === 'raster';\n\nexport class RasterStyleLayer extends StyleLayer {\n _transitionablePaint: Transitionable;\n _transitioningPaint: Transitioning;\n paint: PossiblyEvaluated;\n\n constructor(layer: LayerSpecification, globalState: Record) {\n super(layer, properties, globalState);\n }\n}\n","// Note: all \"sizes\" are measured in bytes\n\n/**\n * @internal\n * A view type size\n */\nconst viewTypes = {\n 'Int8': Int8Array,\n 'Uint8': Uint8Array,\n 'Int16': Int16Array,\n 'Uint16': Uint16Array,\n 'Int32': Int32Array,\n 'Uint32': Uint32Array,\n 'Float32': Float32Array\n};\n\n/**\n * @internal\n * A view type size\n */\nexport type ViewType = keyof typeof viewTypes;\n\n/** @internal */\nclass Struct {\n _pos1: number;\n _pos2: number;\n _pos4: number;\n _pos8: number;\n readonly _structArray: StructArray;\n\n // The following properties are defined on the prototype of sub classes.\n size: number;\n\n /**\n * @param structArray - The StructArray the struct is stored in\n * @param index - The index of the struct in the StructArray.\n */\n constructor(structArray: StructArray, index: number) {\n (this as any)._structArray = structArray;\n this._pos1 = index * this.size;\n this._pos2 = this._pos1 / 2;\n this._pos4 = this._pos1 / 4;\n this._pos8 = this._pos1 / 8;\n }\n}\n\nconst DEFAULT_CAPACITY = 128;\nconst RESIZE_MULTIPLIER = 5;\n\n/**\n * @internal\n * A struct array member\n */\nexport type StructArrayMember = {\n name: string;\n type: ViewType;\n components: number;\n offset: number;\n};\n\nexport type StructArrayLayout = {\n members: StructArrayMember[];\n size: number;\n alignment: number;\n};\n\n/**\n * An array that can be deserialized\n */\nexport type SerializedStructArray = {\n length: number;\n arrayBuffer: ArrayBuffer;\n};\n\n/**\n * @internal\n * `StructArray` provides an abstraction over `ArrayBuffer` and `TypedArray`\n * making it behave like an array of typed structs.\n *\n * Conceptually, a StructArray is comprised of elements, i.e., instances of its\n * associated struct type. Each particular struct type, together with an\n * alignment size, determines the memory layout of a StructArray whose elements\n * are of that type. Thus, for each such layout that we need, we have\n * a corresponding StructArrayLayout class, inheriting from StructArray and\n * implementing `emplaceBack()` and `_refreshViews()`.\n *\n * In some cases, where we need to access particular elements of a StructArray,\n * we implement a more specific subclass that inherits from one of the\n * StructArrayLayouts and adds a `get(i): T` accessor that returns a structured\n * object whose properties are proxies into the underlying memory space for the\n * i-th element. This affords the convenience of working with (seemingly) plain\n * Javascript objects without the overhead of serializing/deserializing them\n * into ArrayBuffers for efficient web worker transfer.\n */\nabstract class StructArray {\n capacity: number;\n length: number;\n isTransferred: boolean;\n arrayBuffer: ArrayBuffer;\n uint8: Uint8Array;\n\n // The following properties are defined on the prototype.\n members: StructArrayMember[];\n bytesPerElement: number;\n abstract emplaceBack(...v: number[]);\n abstract emplace(i: number, ...v: number[]);\n\n constructor() {\n this.isTransferred = false;\n this.capacity = -1;\n this.resize(0);\n }\n\n /**\n * Serialize a StructArray instance. Serializes both the raw data and the\n * metadata needed to reconstruct the StructArray base class during\n * deserialization.\n */\n static serialize(array: StructArray, transferables?: Transferable[]): SerializedStructArray {\n\n array._trim();\n\n if (transferables) {\n array.isTransferred = true;\n transferables.push(array.arrayBuffer);\n }\n\n return {\n length: array.length,\n arrayBuffer: array.arrayBuffer,\n };\n }\n\n static deserialize(input: SerializedStructArray) {\n const structArray = Object.create(this.prototype);\n structArray.arrayBuffer = input.arrayBuffer;\n structArray.length = input.length;\n structArray.capacity = input.arrayBuffer.byteLength / structArray.bytesPerElement;\n structArray._refreshViews();\n return structArray;\n }\n\n /**\n * Resize the array to discard unused capacity.\n */\n _trim() {\n if (this.length !== this.capacity) {\n this.capacity = this.length;\n this.arrayBuffer = this.arrayBuffer.slice(0, this.length * this.bytesPerElement);\n this._refreshViews();\n }\n }\n\n /**\n * Resets the length of the array to 0 without de-allocating capacity.\n */\n clear() {\n this.length = 0;\n }\n\n /**\n * Resize the array.\n * If `n` is greater than the current length then additional elements with undefined values are added.\n * If `n` is less than the current length then the array will be reduced to the first `n` elements.\n * @param n - The new size of the array.\n */\n resize(n: number) {\n this.reserve(n);\n this.length = n;\n }\n\n /**\n * Indicate a planned increase in size, so that any necessary allocation may\n * be done once, ahead of time.\n * @param n - The expected size of the array.\n */\n reserve(n: number) {\n if (n > this.capacity) {\n this.capacity = Math.max(n, Math.floor(this.capacity * RESIZE_MULTIPLIER), DEFAULT_CAPACITY);\n this.arrayBuffer = new ArrayBuffer(this.capacity * this.bytesPerElement);\n\n const oldUint8Array = this.uint8;\n this._refreshViews();\n if (oldUint8Array) this.uint8.set(oldUint8Array);\n }\n }\n\n /**\n * Create TypedArray views for the current ArrayBuffer.\n */\n _refreshViews() {\n throw new Error('_refreshViews() must be implemented by each concrete StructArray layout');\n }\n\n /**\n * Replace the buffer with an empty one so typed views release the original ArrayBuffer for GC.\n */\n freeBufferAfterUpload() {\n this.arrayBuffer = new ArrayBuffer(0);\n this._refreshViews();\n }\n}\n\n/**\n * Given a list of member fields, create a full StructArrayLayout, in\n * particular calculating the correct byte offset for each field. This data\n * is used at build time to generate StructArrayLayout_*.emplaceBack() and\n * other accessors, and at runtime for binding vertex buffer attributes.\n */\nfunction createLayout(\n members: Array<{\n name: string;\n type: ViewType;\n readonly components?: number;\n }>,\n alignment: number = 1\n): StructArrayLayout {\n\n let offset = 0;\n let maxSize = 0;\n const layoutMembers = members.map((member) => {\n const typeSize = sizeOf(member.type);\n const memberOffset = offset = align(offset, Math.max(alignment, typeSize));\n const components = member.components || 1;\n\n maxSize = Math.max(maxSize, typeSize);\n offset += typeSize * components;\n\n return {\n name: member.name,\n type: member.type,\n components,\n offset: memberOffset,\n };\n });\n\n const size = align(offset, Math.max(maxSize, alignment));\n\n return {\n members: layoutMembers,\n size,\n alignment\n };\n}\n\nfunction sizeOf(type: ViewType): number {\n return viewTypes[type].BYTES_PER_ELEMENT;\n}\n\nfunction align(offset: number, size: number): number {\n return Math.ceil(offset / size) * size;\n}\n\nexport {StructArray, Struct, viewTypes, createLayout};\n","// This file is generated. Edit build/generate-struct-arrays.ts, then run `npm run codegen`.\n\nimport {Struct, StructArray} from '../util/struct_array';\nimport {register} from '../util/web_worker_transfer';\nimport Point from '@mapbox/point-geometry';\n\n/**\n * @internal\n * Implementation of the StructArray layout:\n * [0] - Int16[2]\n *\n */\nclass StructArrayLayout2i4 extends StructArray {\n uint8: Uint8Array;\n int16: Int16Array;\n\n _refreshViews() {\n this.uint8 = new Uint8Array(this.arrayBuffer);\n this.int16 = new Int16Array(this.arrayBuffer);\n }\n\n public emplaceBack(v0: number, v1: number) {\n const i = this.length;\n this.resize(i + 1);\n return this.emplace(i, v0, v1);\n }\n\n public emplace(i: number, v0: number, v1: number) {\n const o2 = i * 2;\n this.int16[o2 + 0] = v0;\n this.int16[o2 + 1] = v1;\n return i;\n }\n}\n\nStructArrayLayout2i4.prototype.bytesPerElement = 4;\nregister('StructArrayLayout2i4', StructArrayLayout2i4);\n\n/**\n * @internal\n * Implementation of the StructArray layout:\n * [0] - Int16[3]\n *\n */\nclass StructArrayLayout3i6 extends StructArray {\n uint8: Uint8Array;\n int16: Int16Array;\n\n _refreshViews() {\n this.uint8 = new Uint8Array(this.arrayBuffer);\n this.int16 = new Int16Array(this.arrayBuffer);\n }\n\n public emplaceBack(v0: number, v1: number, v2: number) {\n const i = this.length;\n this.resize(i + 1);\n return this.emplace(i, v0, v1, v2);\n }\n\n public emplace(i: number, v0: number, v1: number, v2: number) {\n const o2 = i * 3;\n this.int16[o2 + 0] = v0;\n this.int16[o2 + 1] = v1;\n this.int16[o2 + 2] = v2;\n return i;\n }\n}\n\nStructArrayLayout3i6.prototype.bytesPerElement = 6;\nregister('StructArrayLayout3i6', StructArrayLayout3i6);\n\n/**\n * @internal\n * Implementation of the StructArray layout:\n * [0] - Int16[4]\n *\n */\nclass StructArrayLayout4i8 extends StructArray {\n uint8: Uint8Array;\n int16: Int16Array;\n\n _refreshViews() {\n this.uint8 = new Uint8Array(this.arrayBuffer);\n this.int16 = new Int16Array(this.arrayBuffer);\n }\n\n public emplaceBack(v0: number, v1: number, v2: number, v3: number) {\n const i = this.length;\n this.resize(i + 1);\n return this.emplace(i, v0, v1, v2, v3);\n }\n\n public emplace(i: number, v0: number, v1: number, v2: number, v3: number) {\n const o2 = i * 4;\n this.int16[o2 + 0] = v0;\n this.int16[o2 + 1] = v1;\n this.int16[o2 + 2] = v2;\n this.int16[o2 + 3] = v3;\n return i;\n }\n}\n\nStructArrayLayout4i8.prototype.bytesPerElement = 8;\nregister('StructArrayLayout4i8', StructArrayLayout4i8);\n\n/**\n * @internal\n * Implementation of the StructArray layout:\n * [0] - Int16[2]\n * [4] - Int16[4]\n *\n */\nclass StructArrayLayout2i4i12 extends StructArray {\n uint8: Uint8Array;\n int16: Int16Array;\n\n _refreshViews() {\n this.uint8 = new Uint8Array(this.arrayBuffer);\n this.int16 = new Int16Array(this.arrayBuffer);\n }\n\n public emplaceBack(v0: number, v1: number, v2: number, v3: number, v4: number, v5: number) {\n const i = this.length;\n this.resize(i + 1);\n return this.emplace(i, v0, v1, v2, v3, v4, v5);\n }\n\n public emplace(i: number, v0: number, v1: number, v2: number, v3: number, v4: number, v5: number) {\n const o2 = i * 6;\n this.int16[o2 + 0] = v0;\n this.int16[o2 + 1] = v1;\n this.int16[o2 + 2] = v2;\n this.int16[o2 + 3] = v3;\n this.int16[o2 + 4] = v4;\n this.int16[o2 + 5] = v5;\n return i;\n }\n}\n\nStructArrayLayout2i4i12.prototype.bytesPerElement = 12;\nregister('StructArrayLayout2i4i12', StructArrayLayout2i4i12);\n\n/**\n * @internal\n * Implementation of the StructArray layout:\n * [0] - Int16[2]\n * [4] - Uint8[4]\n *\n */\nclass StructArrayLayout2i4ub8 extends StructArray {\n uint8: Uint8Array;\n int16: Int16Array;\n\n _refreshViews() {\n this.uint8 = new Uint8Array(this.arrayBuffer);\n this.int16 = new Int16Array(this.arrayBuffer);\n }\n\n public emplaceBack(v0: number, v1: number, v2: number, v3: number, v4: number, v5: number) {\n const i = this.length;\n this.resize(i + 1);\n return this.emplace(i, v0, v1, v2, v3, v4, v5);\n }\n\n public emplace(i: number, v0: number, v1: number, v2: number, v3: number, v4: number, v5: number) {\n const o2 = i * 4;\n const o1 = i * 8;\n this.int16[o2 + 0] = v0;\n this.int16[o2 + 1] = v1;\n this.uint8[o1 + 4] = v2;\n this.uint8[o1 + 5] = v3;\n this.uint8[o1 + 6] = v4;\n this.uint8[o1 + 7] = v5;\n return i;\n }\n}\n\nStructArrayLayout2i4ub8.prototype.bytesPerElement = 8;\nregister('StructArrayLayout2i4ub8', StructArrayLayout2i4ub8);\n\n/**\n * @internal\n * Implementation of the StructArray layout:\n * [0] - Float32[2]\n *\n */\nclass StructArrayLayout2f8 extends StructArray {\n uint8: Uint8Array;\n float32: Float32Array;\n\n _refreshViews() {\n this.uint8 = new Uint8Array(this.arrayBuffer);\n this.float32 = new Float32Array(this.arrayBuffer);\n }\n\n public emplaceBack(v0: number, v1: number) {\n const i = this.length;\n this.resize(i + 1);\n return this.emplace(i, v0, v1);\n }\n\n public emplace(i: number, v0: number, v1: number) {\n const o4 = i * 2;\n this.float32[o4 + 0] = v0;\n this.float32[o4 + 1] = v1;\n return i;\n }\n}\n\nStructArrayLayout2f8.prototype.bytesPerElement = 8;\nregister('StructArrayLayout2f8', StructArrayLayout2f8);\n\n/**\n * @internal\n * Implementation of the StructArray layout:\n * [0] - Uint16[10]\n *\n */\nclass StructArrayLayout10ui20 extends StructArray {\n uint8: Uint8Array;\n uint16: Uint16Array;\n\n _refreshViews() {\n this.uint8 = new Uint8Array(this.arrayBuffer);\n this.uint16 = new Uint16Array(this.arrayBuffer);\n }\n\n public emplaceBack(v0: number, v1: number, v2: number, v3: number, v4: number, v5: number, v6: number, v7: number, v8: number, v9: number) {\n const i = this.length;\n this.resize(i + 1);\n return this.emplace(i, v0, v1, v2, v3, v4, v5, v6, v7, v8, v9);\n }\n\n public emplace(i: number, v0: number, v1: number, v2: number, v3: number, v4: number, v5: number, v6: number, v7: number, v8: number, v9: number) {\n const o2 = i * 10;\n this.uint16[o2 + 0] = v0;\n this.uint16[o2 + 1] = v1;\n this.uint16[o2 + 2] = v2;\n this.uint16[o2 + 3] = v3;\n this.uint16[o2 + 4] = v4;\n this.uint16[o2 + 5] = v5;\n this.uint16[o2 + 6] = v6;\n this.uint16[o2 + 7] = v7;\n this.uint16[o2 + 8] = v8;\n this.uint16[o2 + 9] = v9;\n return i;\n }\n}\n\nStructArrayLayout10ui20.prototype.bytesPerElement = 20;\nregister('StructArrayLayout10ui20', StructArrayLayout10ui20);\n\n/**\n * @internal\n * Implementation of the StructArray layout:\n * [0] - Uint16[8]\n *\n */\nclass StructArrayLayout8ui16 extends StructArray {\n uint8: Uint8Array;\n uint16: Uint16Array;\n\n _refreshViews() {\n this.uint8 = new Uint8Array(this.arrayBuffer);\n this.uint16 = new Uint16Array(this.arrayBuffer);\n }\n\n public emplaceBack(v0: number, v1: number, v2: number, v3: number, v4: number, v5: number, v6: number, v7: number) {\n const i = this.length;\n this.resize(i + 1);\n return this.emplace(i, v0, v1, v2, v3, v4, v5, v6, v7);\n }\n\n public emplace(i: number, v0: number, v1: number, v2: number, v3: number, v4: number, v5: number, v6: number, v7: number) {\n const o2 = i * 8;\n this.uint16[o2 + 0] = v0;\n this.uint16[o2 + 1] = v1;\n this.uint16[o2 + 2] = v2;\n this.uint16[o2 + 3] = v3;\n this.uint16[o2 + 4] = v4;\n this.uint16[o2 + 5] = v5;\n this.uint16[o2 + 6] = v6;\n this.uint16[o2 + 7] = v7;\n return i;\n }\n}\n\nStructArrayLayout8ui16.prototype.bytesPerElement = 16;\nregister('StructArrayLayout8ui16', StructArrayLayout8ui16);\n\n/**\n * @internal\n * Implementation of the StructArray layout:\n * [0] - Int16[4]\n * [8] - Uint16[4]\n * [16] - Int16[4]\n *\n */\nclass StructArrayLayout4i4ui4i24 extends StructArray {\n uint8: Uint8Array;\n int16: Int16Array;\n uint16: Uint16Array;\n\n _refreshViews() {\n this.uint8 = new Uint8Array(this.arrayBuffer);\n this.int16 = new Int16Array(this.arrayBuffer);\n this.uint16 = new Uint16Array(this.arrayBuffer);\n }\n\n public emplaceBack(v0: number, v1: number, v2: number, v3: number, v4: number, v5: number, v6: number, v7: number, v8: number, v9: number, v10: number, v11: number) {\n const i = this.length;\n this.resize(i + 1);\n return this.emplace(i, v0, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11);\n }\n\n public emplace(i: number, v0: number, v1: number, v2: number, v3: number, v4: number, v5: number, v6: number, v7: number, v8: number, v9: number, v10: number, v11: number) {\n const o2 = i * 12;\n this.int16[o2 + 0] = v0;\n this.int16[o2 + 1] = v1;\n this.int16[o2 + 2] = v2;\n this.int16[o2 + 3] = v3;\n this.uint16[o2 + 4] = v4;\n this.uint16[o2 + 5] = v5;\n this.uint16[o2 + 6] = v6;\n this.uint16[o2 + 7] = v7;\n this.int16[o2 + 8] = v8;\n this.int16[o2 + 9] = v9;\n this.int16[o2 + 10] = v10;\n this.int16[o2 + 11] = v11;\n return i;\n }\n}\n\nStructArrayLayout4i4ui4i24.prototype.bytesPerElement = 24;\nregister('StructArrayLayout4i4ui4i24', StructArrayLayout4i4ui4i24);\n\n/**\n * @internal\n * Implementation of the StructArray layout:\n * [0] - Float32[3]\n *\n */\nclass StructArrayLayout3f12 extends StructArray {\n uint8: Uint8Array;\n float32: Float32Array;\n\n _refreshViews() {\n this.uint8 = new Uint8Array(this.arrayBuffer);\n this.float32 = new Float32Array(this.arrayBuffer);\n }\n\n public emplaceBack(v0: number, v1: number, v2: number) {\n const i = this.length;\n this.resize(i + 1);\n return this.emplace(i, v0, v1, v2);\n }\n\n public emplace(i: number, v0: number, v1: number, v2: number) {\n const o4 = i * 3;\n this.float32[o4 + 0] = v0;\n this.float32[o4 + 1] = v1;\n this.float32[o4 + 2] = v2;\n return i;\n }\n}\n\nStructArrayLayout3f12.prototype.bytesPerElement = 12;\nregister('StructArrayLayout3f12', StructArrayLayout3f12);\n\n/**\n * @internal\n * Implementation of the StructArray layout:\n * [0] - Uint32[1]\n *\n */\nclass StructArrayLayout1ul4 extends StructArray {\n uint8: Uint8Array;\n uint32: Uint32Array;\n\n _refreshViews() {\n this.uint8 = new Uint8Array(this.arrayBuffer);\n this.uint32 = new Uint32Array(this.arrayBuffer);\n }\n\n public emplaceBack(v0: number) {\n const i = this.length;\n this.resize(i + 1);\n return this.emplace(i, v0);\n }\n\n public emplace(i: number, v0: number) {\n const o4 = i * 1;\n this.uint32[o4 + 0] = v0;\n return i;\n }\n}\n\nStructArrayLayout1ul4.prototype.bytesPerElement = 4;\nregister('StructArrayLayout1ul4', StructArrayLayout1ul4);\n\n/**\n * @internal\n * Implementation of the StructArray layout:\n * [0] - Int16[6]\n * [12] - Uint32[1]\n * [16] - Uint16[2]\n *\n */\nclass StructArrayLayout6i1ul2ui20 extends StructArray {\n uint8: Uint8Array;\n int16: Int16Array;\n uint32: Uint32Array;\n uint16: Uint16Array;\n\n _refreshViews() {\n this.uint8 = new Uint8Array(this.arrayBuffer);\n this.int16 = new Int16Array(this.arrayBuffer);\n this.uint32 = new Uint32Array(this.arrayBuffer);\n this.uint16 = new Uint16Array(this.arrayBuffer);\n }\n\n public emplaceBack(v0: number, v1: number, v2: number, v3: number, v4: number, v5: number, v6: number, v7: number, v8: number) {\n const i = this.length;\n this.resize(i + 1);\n return this.emplace(i, v0, v1, v2, v3, v4, v5, v6, v7, v8);\n }\n\n public emplace(i: number, v0: number, v1: number, v2: number, v3: number, v4: number, v5: number, v6: number, v7: number, v8: number) {\n const o2 = i * 10;\n const o4 = i * 5;\n this.int16[o2 + 0] = v0;\n this.int16[o2 + 1] = v1;\n this.int16[o2 + 2] = v2;\n this.int16[o2 + 3] = v3;\n this.int16[o2 + 4] = v4;\n this.int16[o2 + 5] = v5;\n this.uint32[o4 + 3] = v6;\n this.uint16[o2 + 8] = v7;\n this.uint16[o2 + 9] = v8;\n return i;\n }\n}\n\nStructArrayLayout6i1ul2ui20.prototype.bytesPerElement = 20;\nregister('StructArrayLayout6i1ul2ui20', StructArrayLayout6i1ul2ui20);\n\n/**\n * @internal\n * Implementation of the StructArray layout:\n * [0] - Int16[2]\n * [4] - Int16[2]\n * [8] - Int16[2]\n *\n */\nclass StructArrayLayout2i2i2i12 extends StructArray {\n uint8: Uint8Array;\n int16: Int16Array;\n\n _refreshViews() {\n this.uint8 = new Uint8Array(this.arrayBuffer);\n this.int16 = new Int16Array(this.arrayBuffer);\n }\n\n public emplaceBack(v0: number, v1: number, v2: number, v3: number, v4: number, v5: number) {\n const i = this.length;\n this.resize(i + 1);\n return this.emplace(i, v0, v1, v2, v3, v4, v5);\n }\n\n public emplace(i: number, v0: number, v1: number, v2: number, v3: number, v4: number, v5: number) {\n const o2 = i * 6;\n this.int16[o2 + 0] = v0;\n this.int16[o2 + 1] = v1;\n this.int16[o2 + 2] = v2;\n this.int16[o2 + 3] = v3;\n this.int16[o2 + 4] = v4;\n this.int16[o2 + 5] = v5;\n return i;\n }\n}\n\nStructArrayLayout2i2i2i12.prototype.bytesPerElement = 12;\nregister('StructArrayLayout2i2i2i12', StructArrayLayout2i2i2i12);\n\n/**\n * @internal\n * Implementation of the StructArray layout:\n * [0] - Float32[2]\n * [8] - Float32[1]\n * [12] - Int16[2]\n *\n */\nclass StructArrayLayout2f1f2i16 extends StructArray {\n uint8: Uint8Array;\n float32: Float32Array;\n int16: Int16Array;\n\n _refreshViews() {\n this.uint8 = new Uint8Array(this.arrayBuffer);\n this.float32 = new Float32Array(this.arrayBuffer);\n this.int16 = new Int16Array(this.arrayBuffer);\n }\n\n public emplaceBack(v0: number, v1: number, v2: number, v3: number, v4: number) {\n const i = this.length;\n this.resize(i + 1);\n return this.emplace(i, v0, v1, v2, v3, v4);\n }\n\n public emplace(i: number, v0: number, v1: number, v2: number, v3: number, v4: number) {\n const o4 = i * 4;\n const o2 = i * 8;\n this.float32[o4 + 0] = v0;\n this.float32[o4 + 1] = v1;\n this.float32[o4 + 2] = v2;\n this.int16[o2 + 6] = v3;\n this.int16[o2 + 7] = v4;\n return i;\n }\n}\n\nStructArrayLayout2f1f2i16.prototype.bytesPerElement = 16;\nregister('StructArrayLayout2f1f2i16', StructArrayLayout2f1f2i16);\n\n/**\n * @internal\n * Implementation of the StructArray layout:\n * [0] - Uint8[2]\n * [4] - Float32[2]\n * [12] - Int16[2]\n *\n */\nclass StructArrayLayout2ub2f2i16 extends StructArray {\n uint8: Uint8Array;\n float32: Float32Array;\n int16: Int16Array;\n\n _refreshViews() {\n this.uint8 = new Uint8Array(this.arrayBuffer);\n this.float32 = new Float32Array(this.arrayBuffer);\n this.int16 = new Int16Array(this.arrayBuffer);\n }\n\n public emplaceBack(v0: number, v1: number, v2: number, v3: number, v4: number, v5: number) {\n const i = this.length;\n this.resize(i + 1);\n return this.emplace(i, v0, v1, v2, v3, v4, v5);\n }\n\n public emplace(i: number, v0: number, v1: number, v2: number, v3: number, v4: number, v5: number) {\n const o1 = i * 16;\n const o4 = i * 4;\n const o2 = i * 8;\n this.uint8[o1 + 0] = v0;\n this.uint8[o1 + 1] = v1;\n this.float32[o4 + 1] = v2;\n this.float32[o4 + 2] = v3;\n this.int16[o2 + 6] = v4;\n this.int16[o2 + 7] = v5;\n return i;\n }\n}\n\nStructArrayLayout2ub2f2i16.prototype.bytesPerElement = 16;\nregister('StructArrayLayout2ub2f2i16', StructArrayLayout2ub2f2i16);\n\n/**\n * @internal\n * Implementation of the StructArray layout:\n * [0] - Uint16[3]\n *\n */\nclass StructArrayLayout3ui6 extends StructArray {\n uint8: Uint8Array;\n uint16: Uint16Array;\n\n _refreshViews() {\n this.uint8 = new Uint8Array(this.arrayBuffer);\n this.uint16 = new Uint16Array(this.arrayBuffer);\n }\n\n public emplaceBack(v0: number, v1: number, v2: number) {\n const i = this.length;\n this.resize(i + 1);\n return this.emplace(i, v0, v1, v2);\n }\n\n public emplace(i: number, v0: number, v1: number, v2: number) {\n const o2 = i * 3;\n this.uint16[o2 + 0] = v0;\n this.uint16[o2 + 1] = v1;\n this.uint16[o2 + 2] = v2;\n return i;\n }\n}\n\nStructArrayLayout3ui6.prototype.bytesPerElement = 6;\nregister('StructArrayLayout3ui6', StructArrayLayout3ui6);\n\n/**\n * @internal\n * Implementation of the StructArray layout:\n * [0] - Int16[2]\n * [4] - Uint16[2]\n * [8] - Uint32[3]\n * [20] - Uint16[3]\n * [28] - Float32[2]\n * [36] - Uint8[3]\n * [40] - Uint32[1]\n * [44] - Int16[1]\n *\n */\nclass StructArrayLayout2i2ui3ul3ui2f3ub1ul1i48 extends StructArray {\n uint8: Uint8Array;\n int16: Int16Array;\n uint16: Uint16Array;\n uint32: Uint32Array;\n float32: Float32Array;\n\n _refreshViews() {\n this.uint8 = new Uint8Array(this.arrayBuffer);\n this.int16 = new Int16Array(this.arrayBuffer);\n this.uint16 = new Uint16Array(this.arrayBuffer);\n this.uint32 = new Uint32Array(this.arrayBuffer);\n this.float32 = new Float32Array(this.arrayBuffer);\n }\n\n public emplaceBack(v0: number, v1: number, v2: number, v3: number, v4: number, v5: number, v6: number, v7: number, v8: number, v9: number, v10: number, v11: number, v12: number, v13: number, v14: number, v15: number, v16: number) {\n const i = this.length;\n this.resize(i + 1);\n return this.emplace(i, v0, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16);\n }\n\n public emplace(i: number, v0: number, v1: number, v2: number, v3: number, v4: number, v5: number, v6: number, v7: number, v8: number, v9: number, v10: number, v11: number, v12: number, v13: number, v14: number, v15: number, v16: number) {\n const o2 = i * 24;\n const o4 = i * 12;\n const o1 = i * 48;\n this.int16[o2 + 0] = v0;\n this.int16[o2 + 1] = v1;\n this.uint16[o2 + 2] = v2;\n this.uint16[o2 + 3] = v3;\n this.uint32[o4 + 2] = v4;\n this.uint32[o4 + 3] = v5;\n this.uint32[o4 + 4] = v6;\n this.uint16[o2 + 10] = v7;\n this.uint16[o2 + 11] = v8;\n this.uint16[o2 + 12] = v9;\n this.float32[o4 + 7] = v10;\n this.float32[o4 + 8] = v11;\n this.uint8[o1 + 36] = v12;\n this.uint8[o1 + 37] = v13;\n this.uint8[o1 + 38] = v14;\n this.uint32[o4 + 10] = v15;\n this.int16[o2 + 22] = v16;\n return i;\n }\n}\n\nStructArrayLayout2i2ui3ul3ui2f3ub1ul1i48.prototype.bytesPerElement = 48;\nregister('StructArrayLayout2i2ui3ul3ui2f3ub1ul1i48', StructArrayLayout2i2ui3ul3ui2f3ub1ul1i48);\n\n/**\n * @internal\n * Implementation of the StructArray layout:\n * [0] - Int16[8]\n * [16] - Uint16[15]\n * [48] - Uint32[1]\n * [52] - Float32[2]\n * [60] - Uint16[2]\n *\n */\nclass StructArrayLayout8i15ui1ul2f2ui64 extends StructArray {\n uint8: Uint8Array;\n int16: Int16Array;\n uint16: Uint16Array;\n uint32: Uint32Array;\n float32: Float32Array;\n\n _refreshViews() {\n this.uint8 = new Uint8Array(this.arrayBuffer);\n this.int16 = new Int16Array(this.arrayBuffer);\n this.uint16 = new Uint16Array(this.arrayBuffer);\n this.uint32 = new Uint32Array(this.arrayBuffer);\n this.float32 = new Float32Array(this.arrayBuffer);\n }\n\n public emplaceBack(v0: number, v1: number, v2: number, v3: number, v4: number, v5: number, v6: number, v7: number, v8: number, v9: number, v10: number, v11: number, v12: number, v13: number, v14: number, v15: number, v16: number, v17: number, v18: number, v19: number, v20: number, v21: number, v22: number, v23: number, v24: number, v25: number, v26: number, v27: number) {\n const i = this.length;\n this.resize(i + 1);\n return this.emplace(i, v0, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27);\n }\n\n public emplace(i: number, v0: number, v1: number, v2: number, v3: number, v4: number, v5: number, v6: number, v7: number, v8: number, v9: number, v10: number, v11: number, v12: number, v13: number, v14: number, v15: number, v16: number, v17: number, v18: number, v19: number, v20: number, v21: number, v22: number, v23: number, v24: number, v25: number, v26: number, v27: number) {\n const o2 = i * 32;\n const o4 = i * 16;\n this.int16[o2 + 0] = v0;\n this.int16[o2 + 1] = v1;\n this.int16[o2 + 2] = v2;\n this.int16[o2 + 3] = v3;\n this.int16[o2 + 4] = v4;\n this.int16[o2 + 5] = v5;\n this.int16[o2 + 6] = v6;\n this.int16[o2 + 7] = v7;\n this.uint16[o2 + 8] = v8;\n this.uint16[o2 + 9] = v9;\n this.uint16[o2 + 10] = v10;\n this.uint16[o2 + 11] = v11;\n this.uint16[o2 + 12] = v12;\n this.uint16[o2 + 13] = v13;\n this.uint16[o2 + 14] = v14;\n this.uint16[o2 + 15] = v15;\n this.uint16[o2 + 16] = v16;\n this.uint16[o2 + 17] = v17;\n this.uint16[o2 + 18] = v18;\n this.uint16[o2 + 19] = v19;\n this.uint16[o2 + 20] = v20;\n this.uint16[o2 + 21] = v21;\n this.uint16[o2 + 22] = v22;\n this.uint32[o4 + 12] = v23;\n this.float32[o4 + 13] = v24;\n this.float32[o4 + 14] = v25;\n this.uint16[o2 + 30] = v26;\n this.uint16[o2 + 31] = v27;\n return i;\n }\n}\n\nStructArrayLayout8i15ui1ul2f2ui64.prototype.bytesPerElement = 64;\nregister('StructArrayLayout8i15ui1ul2f2ui64', StructArrayLayout8i15ui1ul2f2ui64);\n\n/**\n * @internal\n * Implementation of the StructArray layout:\n * [0] - Float32[1]\n *\n */\nclass StructArrayLayout1f4 extends StructArray {\n uint8: Uint8Array;\n float32: Float32Array;\n\n _refreshViews() {\n this.uint8 = new Uint8Array(this.arrayBuffer);\n this.float32 = new Float32Array(this.arrayBuffer);\n }\n\n public emplaceBack(v0: number) {\n const i = this.length;\n this.resize(i + 1);\n return this.emplace(i, v0);\n }\n\n public emplace(i: number, v0: number) {\n const o4 = i * 1;\n this.float32[o4 + 0] = v0;\n return i;\n }\n}\n\nStructArrayLayout1f4.prototype.bytesPerElement = 4;\nregister('StructArrayLayout1f4', StructArrayLayout1f4);\n\n/**\n * @internal\n * Implementation of the StructArray layout:\n * [0] - Uint16[1]\n * [4] - Float32[2]\n *\n */\nclass StructArrayLayout1ui2f12 extends StructArray {\n uint8: Uint8Array;\n uint16: Uint16Array;\n float32: Float32Array;\n\n _refreshViews() {\n this.uint8 = new Uint8Array(this.arrayBuffer);\n this.uint16 = new Uint16Array(this.arrayBuffer);\n this.float32 = new Float32Array(this.arrayBuffer);\n }\n\n public emplaceBack(v0: number, v1: number, v2: number) {\n const i = this.length;\n this.resize(i + 1);\n return this.emplace(i, v0, v1, v2);\n }\n\n public emplace(i: number, v0: number, v1: number, v2: number) {\n const o2 = i * 6;\n const o4 = i * 3;\n this.uint16[o2 + 0] = v0;\n this.float32[o4 + 1] = v1;\n this.float32[o4 + 2] = v2;\n return i;\n }\n}\n\nStructArrayLayout1ui2f12.prototype.bytesPerElement = 12;\nregister('StructArrayLayout1ui2f12', StructArrayLayout1ui2f12);\n\n/**\n * @internal\n * Implementation of the StructArray layout:\n * [0] - Uint32[1]\n * [4] - Uint16[2]\n *\n */\nclass StructArrayLayout1ul2ui8 extends StructArray {\n uint8: Uint8Array;\n uint32: Uint32Array;\n uint16: Uint16Array;\n\n _refreshViews() {\n this.uint8 = new Uint8Array(this.arrayBuffer);\n this.uint32 = new Uint32Array(this.arrayBuffer);\n this.uint16 = new Uint16Array(this.arrayBuffer);\n }\n\n public emplaceBack(v0: number, v1: number, v2: number) {\n const i = this.length;\n this.resize(i + 1);\n return this.emplace(i, v0, v1, v2);\n }\n\n public emplace(i: number, v0: number, v1: number, v2: number) {\n const o4 = i * 2;\n const o2 = i * 4;\n this.uint32[o4 + 0] = v0;\n this.uint16[o2 + 2] = v1;\n this.uint16[o2 + 3] = v2;\n return i;\n }\n}\n\nStructArrayLayout1ul2ui8.prototype.bytesPerElement = 8;\nregister('StructArrayLayout1ul2ui8', StructArrayLayout1ul2ui8);\n\n/**\n * @internal\n * Implementation of the StructArray layout:\n * [0] - Uint16[2]\n *\n */\nclass StructArrayLayout2ui4 extends StructArray {\n uint8: Uint8Array;\n uint16: Uint16Array;\n\n _refreshViews() {\n this.uint8 = new Uint8Array(this.arrayBuffer);\n this.uint16 = new Uint16Array(this.arrayBuffer);\n }\n\n public emplaceBack(v0: number, v1: number) {\n const i = this.length;\n this.resize(i + 1);\n return this.emplace(i, v0, v1);\n }\n\n public emplace(i: number, v0: number, v1: number) {\n const o2 = i * 2;\n this.uint16[o2 + 0] = v0;\n this.uint16[o2 + 1] = v1;\n return i;\n }\n}\n\nStructArrayLayout2ui4.prototype.bytesPerElement = 4;\nregister('StructArrayLayout2ui4', StructArrayLayout2ui4);\n\n/**\n * @internal\n * Implementation of the StructArray layout:\n * [0] - Uint16[1]\n *\n */\nclass StructArrayLayout1ui2 extends StructArray {\n uint8: Uint8Array;\n uint16: Uint16Array;\n\n _refreshViews() {\n this.uint8 = new Uint8Array(this.arrayBuffer);\n this.uint16 = new Uint16Array(this.arrayBuffer);\n }\n\n public emplaceBack(v0: number) {\n const i = this.length;\n this.resize(i + 1);\n return this.emplace(i, v0);\n }\n\n public emplace(i: number, v0: number) {\n const o2 = i * 1;\n this.uint16[o2 + 0] = v0;\n return i;\n }\n}\n\nStructArrayLayout1ui2.prototype.bytesPerElement = 2;\nregister('StructArrayLayout1ui2', StructArrayLayout1ui2);\n\n/**\n * @internal\n * Implementation of the StructArray layout:\n * [0] - Float32[4]\n *\n */\nclass StructArrayLayout4f16 extends StructArray {\n uint8: Uint8Array;\n float32: Float32Array;\n\n _refreshViews() {\n this.uint8 = new Uint8Array(this.arrayBuffer);\n this.float32 = new Float32Array(this.arrayBuffer);\n }\n\n public emplaceBack(v0: number, v1: number, v2: number, v3: number) {\n const i = this.length;\n this.resize(i + 1);\n return this.emplace(i, v0, v1, v2, v3);\n }\n\n public emplace(i: number, v0: number, v1: number, v2: number, v3: number) {\n const o4 = i * 4;\n this.float32[o4 + 0] = v0;\n this.float32[o4 + 1] = v1;\n this.float32[o4 + 2] = v2;\n this.float32[o4 + 3] = v3;\n return i;\n }\n}\n\nStructArrayLayout4f16.prototype.bytesPerElement = 16;\nregister('StructArrayLayout4f16', StructArrayLayout4f16);\n\n/** @internal */\nclass CollisionBoxStruct extends Struct {\n _structArray: CollisionBoxArray;\n get anchorPointX() { return this._structArray.int16[this._pos2 + 0]; }\n get anchorPointY() { return this._structArray.int16[this._pos2 + 1]; }\n get x1() { return this._structArray.int16[this._pos2 + 2]; }\n get y1() { return this._structArray.int16[this._pos2 + 3]; }\n get x2() { return this._structArray.int16[this._pos2 + 4]; }\n get y2() { return this._structArray.int16[this._pos2 + 5]; }\n get featureIndex() { return this._structArray.uint32[this._pos4 + 3]; }\n get sourceLayerIndex() { return this._structArray.uint16[this._pos2 + 8]; }\n get bucketIndex() { return this._structArray.uint16[this._pos2 + 9]; }\n get anchorPoint() { return new Point(this.anchorPointX, this.anchorPointY); }\n}\n\nCollisionBoxStruct.prototype.size = 20;\n\nexport type CollisionBox = CollisionBoxStruct;\n\n/** @internal */\nexport class CollisionBoxArray extends StructArrayLayout6i1ul2ui20 {\n /**\n * Return the CollisionBoxStruct at the given location in the array.\n * @param index - The index of the element.\n */\n get(index: number): CollisionBoxStruct {\n return new CollisionBoxStruct(this, index);\n }\n}\n\nregister('CollisionBoxArray', CollisionBoxArray);\n\n/** @internal */\nclass PlacedSymbolStruct extends Struct {\n _structArray: PlacedSymbolArray;\n get anchorX() { return this._structArray.int16[this._pos2 + 0]; }\n get anchorY() { return this._structArray.int16[this._pos2 + 1]; }\n get glyphStartIndex() { return this._structArray.uint16[this._pos2 + 2]; }\n get numGlyphs() { return this._structArray.uint16[this._pos2 + 3]; }\n get vertexStartIndex() { return this._structArray.uint32[this._pos4 + 2]; }\n get lineStartIndex() { return this._structArray.uint32[this._pos4 + 3]; }\n get lineLength() { return this._structArray.uint32[this._pos4 + 4]; }\n get segment() { return this._structArray.uint16[this._pos2 + 10]; }\n get lowerSize() { return this._structArray.uint16[this._pos2 + 11]; }\n get upperSize() { return this._structArray.uint16[this._pos2 + 12]; }\n get lineOffsetX() { return this._structArray.float32[this._pos4 + 7]; }\n get lineOffsetY() { return this._structArray.float32[this._pos4 + 8]; }\n get writingMode() { return this._structArray.uint8[this._pos1 + 36]; }\n get placedOrientation() { return this._structArray.uint8[this._pos1 + 37]; }\n set placedOrientation(x: number) { this._structArray.uint8[this._pos1 + 37] = x; }\n get hidden() { return this._structArray.uint8[this._pos1 + 38]; }\n set hidden(x: number) { this._structArray.uint8[this._pos1 + 38] = x; }\n get crossTileID() { return this._structArray.uint32[this._pos4 + 10]; }\n set crossTileID(x: number) { this._structArray.uint32[this._pos4 + 10] = x; }\n get associatedIconIndex() { return this._structArray.int16[this._pos2 + 22]; }\n}\n\nPlacedSymbolStruct.prototype.size = 48;\n\nexport type PlacedSymbol = PlacedSymbolStruct;\n\n/** @internal */\nexport class PlacedSymbolArray extends StructArrayLayout2i2ui3ul3ui2f3ub1ul1i48 {\n /**\n * Return the PlacedSymbolStruct at the given location in the array.\n * @param index - The index of the element.\n */\n get(index: number): PlacedSymbolStruct {\n return new PlacedSymbolStruct(this, index);\n }\n}\n\nregister('PlacedSymbolArray', PlacedSymbolArray);\n\n/** @internal */\nclass SymbolInstanceStruct extends Struct {\n _structArray: SymbolInstanceArray;\n get anchorX() { return this._structArray.int16[this._pos2 + 0]; }\n get anchorY() { return this._structArray.int16[this._pos2 + 1]; }\n get rightJustifiedTextSymbolIndex() { return this._structArray.int16[this._pos2 + 2]; }\n get centerJustifiedTextSymbolIndex() { return this._structArray.int16[this._pos2 + 3]; }\n get leftJustifiedTextSymbolIndex() { return this._structArray.int16[this._pos2 + 4]; }\n get verticalPlacedTextSymbolIndex() { return this._structArray.int16[this._pos2 + 5]; }\n get placedIconSymbolIndex() { return this._structArray.int16[this._pos2 + 6]; }\n get verticalPlacedIconSymbolIndex() { return this._structArray.int16[this._pos2 + 7]; }\n get key() { return this._structArray.uint16[this._pos2 + 8]; }\n get textBoxStartIndex() { return this._structArray.uint16[this._pos2 + 9]; }\n get textBoxEndIndex() { return this._structArray.uint16[this._pos2 + 10]; }\n get verticalTextBoxStartIndex() { return this._structArray.uint16[this._pos2 + 11]; }\n get verticalTextBoxEndIndex() { return this._structArray.uint16[this._pos2 + 12]; }\n get iconBoxStartIndex() { return this._structArray.uint16[this._pos2 + 13]; }\n get iconBoxEndIndex() { return this._structArray.uint16[this._pos2 + 14]; }\n get verticalIconBoxStartIndex() { return this._structArray.uint16[this._pos2 + 15]; }\n get verticalIconBoxEndIndex() { return this._structArray.uint16[this._pos2 + 16]; }\n get featureIndex() { return this._structArray.uint16[this._pos2 + 17]; }\n get numHorizontalGlyphVertices() { return this._structArray.uint16[this._pos2 + 18]; }\n get numVerticalGlyphVertices() { return this._structArray.uint16[this._pos2 + 19]; }\n get numIconVertices() { return this._structArray.uint16[this._pos2 + 20]; }\n get numVerticalIconVertices() { return this._structArray.uint16[this._pos2 + 21]; }\n get useRuntimeCollisionCircles() { return this._structArray.uint16[this._pos2 + 22]; }\n get crossTileID() { return this._structArray.uint32[this._pos4 + 12]; }\n set crossTileID(x: number) { this._structArray.uint32[this._pos4 + 12] = x; }\n get textBoxScale() { return this._structArray.float32[this._pos4 + 13]; }\n get collisionCircleDiameter() { return this._structArray.float32[this._pos4 + 14]; }\n get textAnchorOffsetStartIndex() { return this._structArray.uint16[this._pos2 + 30]; }\n get textAnchorOffsetEndIndex() { return this._structArray.uint16[this._pos2 + 31]; }\n}\n\nSymbolInstanceStruct.prototype.size = 64;\n\nexport type SymbolInstance = SymbolInstanceStruct;\n\n/** @internal */\nexport class SymbolInstanceArray extends StructArrayLayout8i15ui1ul2f2ui64 {\n /**\n * Return the SymbolInstanceStruct at the given location in the array.\n * @param index - The index of the element.\n */\n get(index: number): SymbolInstanceStruct {\n return new SymbolInstanceStruct(this, index);\n }\n}\n\nregister('SymbolInstanceArray', SymbolInstanceArray);\n\n/** @internal */\nexport class GlyphOffsetArray extends StructArrayLayout1f4 {\n getoffsetX(index: number) { return this.float32[index * 1 + 0]; }\n}\n\nregister('GlyphOffsetArray', GlyphOffsetArray);\n\n/** @internal */\nexport class SymbolLineVertexArray extends StructArrayLayout3i6 {\n getx(index: number) { return this.int16[index * 3 + 0]; }\n gety(index: number) { return this.int16[index * 3 + 1]; }\n gettileUnitDistanceFromAnchor(index: number) { return this.int16[index * 3 + 2]; }\n}\n\nregister('SymbolLineVertexArray', SymbolLineVertexArray);\n\n/** @internal */\nclass TextAnchorOffsetStruct extends Struct {\n _structArray: TextAnchorOffsetArray;\n get textAnchor() { return this._structArray.uint16[this._pos2 + 0]; }\n get textOffset0() { return this._structArray.float32[this._pos4 + 1]; }\n get textOffset1() { return this._structArray.float32[this._pos4 + 2]; }\n}\n\nTextAnchorOffsetStruct.prototype.size = 12;\n\nexport type TextAnchorOffset = TextAnchorOffsetStruct;\n\n/** @internal */\nexport class TextAnchorOffsetArray extends StructArrayLayout1ui2f12 {\n /**\n * Return the TextAnchorOffsetStruct at the given location in the array.\n * @param index - The index of the element.\n */\n get(index: number): TextAnchorOffsetStruct {\n return new TextAnchorOffsetStruct(this, index);\n }\n}\n\nregister('TextAnchorOffsetArray', TextAnchorOffsetArray);\n\n/** @internal */\nclass FeatureIndexStruct extends Struct {\n _structArray: FeatureIndexArray;\n get featureIndex() { return this._structArray.uint32[this._pos4 + 0]; }\n get sourceLayerIndex() { return this._structArray.uint16[this._pos2 + 2]; }\n get bucketIndex() { return this._structArray.uint16[this._pos2 + 3]; }\n}\n\nFeatureIndexStruct.prototype.size = 8;\n\nexport type FeatureIndex = FeatureIndexStruct;\n\n/** @internal */\nexport class FeatureIndexArray extends StructArrayLayout1ul2ui8 {\n /**\n * Return the FeatureIndexStruct at the given location in the array.\n * @param index - The index of the element.\n */\n get(index: number): FeatureIndexStruct {\n return new FeatureIndexStruct(this, index);\n }\n}\n\nregister('FeatureIndexArray', FeatureIndexArray);\n\nexport class PosArray extends StructArrayLayout2i4 {}\nexport class Pos3dArray extends StructArrayLayout3i6 {}\nexport class RasterBoundsArray extends StructArrayLayout4i8 {}\nexport class CircleLayoutArray extends StructArrayLayout2i4 {}\nexport class FillLayoutArray extends StructArrayLayout2i4 {}\nexport class FillExtrusionLayoutArray extends StructArrayLayout2i4i12 {}\nexport class HeatmapLayoutArray extends StructArrayLayout2i4 {}\nexport class LineLayoutArray extends StructArrayLayout2i4ub8 {}\nexport class LineExtLayoutArray extends StructArrayLayout2f8 {}\nexport class PatternLayoutArray extends StructArrayLayout10ui20 {}\nexport class DashLayoutArray extends StructArrayLayout8ui16 {}\nexport class SymbolLayoutArray extends StructArrayLayout4i4ui4i24 {}\nexport class SymbolDynamicLayoutArray extends StructArrayLayout3f12 {}\nexport class SymbolOpacityArray extends StructArrayLayout1ul4 {}\nexport class CollisionBoxLayoutArray extends StructArrayLayout2i2i2i12 {}\nexport class CollisionCircleLayoutArray extends StructArrayLayout2f1f2i16 {}\nexport class CollisionVertexArray extends StructArrayLayout2ub2f2i16 {}\nexport class QuadTriangleArray extends StructArrayLayout3ui6 {}\nexport class TriangleIndexArray extends StructArrayLayout3ui6 {}\nexport class LineIndexArray extends StructArrayLayout2ui4 {}\nexport class LineStripIndexArray extends StructArrayLayout1ui2 {}\nexport {\n StructArrayLayout2i4,\n StructArrayLayout3i6,\n StructArrayLayout4i8,\n StructArrayLayout2i4i12,\n StructArrayLayout2i4ub8,\n StructArrayLayout2f8,\n StructArrayLayout10ui20,\n StructArrayLayout8ui16,\n StructArrayLayout4i4ui4i24,\n StructArrayLayout3f12,\n StructArrayLayout1ul4,\n StructArrayLayout6i1ul2ui20,\n StructArrayLayout2i2i2i12,\n StructArrayLayout2f1f2i16,\n StructArrayLayout2ub2f2i16,\n StructArrayLayout3ui6,\n StructArrayLayout2i2ui3ul3ui2f3ub1ul1i48,\n StructArrayLayout8i15ui1ul2f2ui64,\n StructArrayLayout1f4,\n StructArrayLayout1ui2f12,\n StructArrayLayout1ul2ui8,\n StructArrayLayout2ui4,\n StructArrayLayout1ui2,\n StructArrayLayout4f16\n};\n","import {createLayout} from '../../util/struct_array';\n\nconst layout = createLayout([\n {name: 'a_pos', components: 2, type: 'Int16'}\n], 4);\n\nexport default layout;\nexport const {members, size, alignment} = layout;\n","import {warnOnce} from '../util/util';\n\nimport {register} from '../util/web_worker_transfer';\n\nimport type {VertexArrayObject} from '../webgl/vertex_array_object';\nimport type {StructArray} from '../util/struct_array';\n\n/**\n * @internal\n * A single segment of a vector\n */\nexport type Segment = {\n sortKey?: number;\n vertexOffset: number;\n primitiveOffset: number;\n vertexLength: number;\n primitiveLength: number;\n vaos: {[_: string]: VertexArrayObject};\n};\n\n/**\n * @internal\n * Used for calculations on vector segments\n */\nexport class SegmentVector {\n static MAX_VERTEX_ARRAY_LENGTH: number;\n segments: Segment[];\n private _forceNewSegmentOnNextPrepare: boolean = false;\n\n constructor(segments: Segment[] = []) {\n this.segments = segments;\n }\n\n /**\n * Returns the last segment if `numVertices` fits into it.\n * If there are no segments yet or `numVertices` doesn't fit into the last one, creates a new empty segment and returns it.\n */\n prepareSegment(\n numVertices: number,\n layoutVertexArray: StructArray,\n indexArray: StructArray,\n sortKey?: number\n ): Segment {\n const lastSegment: Segment = this.segments[this.segments.length - 1];\n\n if (numVertices > SegmentVector.MAX_VERTEX_ARRAY_LENGTH) {\n warnOnce(`Max vertices per segment is ${SegmentVector.MAX_VERTEX_ARRAY_LENGTH}: bucket requested ${numVertices}. Consider using the \\`fillLargeMeshArrays\\` function if you require meshes with more than ${SegmentVector.MAX_VERTEX_ARRAY_LENGTH} vertices.`);\n }\n\n if (this._forceNewSegmentOnNextPrepare || !lastSegment || lastSegment.vertexLength + numVertices > SegmentVector.MAX_VERTEX_ARRAY_LENGTH || lastSegment.sortKey !== sortKey) {\n return this.createNewSegment(layoutVertexArray, indexArray, sortKey);\n } else {\n return lastSegment;\n }\n }\n\n /**\n * Creates a new empty segment and returns it.\n */\n createNewSegment(\n layoutVertexArray: StructArray,\n indexArray: StructArray,\n sortKey?: number\n ): Segment {\n const segment: Segment = {\n vertexOffset: layoutVertexArray.length,\n primitiveOffset: indexArray.length,\n vertexLength: 0,\n primitiveLength: 0,\n vaos: {}\n };\n\n if (sortKey !== undefined) {\n segment.sortKey = sortKey;\n }\n\n // If this was set, we have no need to create a new segment on next prepareSegment call,\n // since this function already created a new, empty segment.\n this._forceNewSegmentOnNextPrepare = false;\n this.segments.push(segment);\n return segment;\n }\n\n /**\n * Returns the last segment, or creates a new segments if there are no segments yet.\n */\n getOrCreateLatestSegment(\n layoutVertexArray: StructArray,\n indexArray: StructArray,\n sortKey?: number\n ): Segment {\n return this.prepareSegment(0, layoutVertexArray, indexArray, sortKey);\n }\n\n /**\n * Causes the next call to {@link prepareSegment} to always return a new segment,\n * not reusing the current segment even if the new geometry would fit it.\n */\n forceNewSegmentOnNextPrepare() {\n this._forceNewSegmentOnNextPrepare = true;\n }\n\n get() {\n return this.segments;\n }\n\n destroy() {\n for (const segment of this.segments) {\n for (const k in segment.vaos) {\n segment.vaos[k].destroy();\n }\n }\n }\n\n static simpleSegment(\n vertexOffset: number,\n primitiveOffset: number,\n vertexLength: number,\n primitiveLength: number\n ): SegmentVector {\n return new SegmentVector([{\n vertexOffset,\n primitiveOffset,\n vertexLength,\n primitiveLength,\n vaos: {},\n sortKey: 0\n }]);\n }\n}\n\n/**\n * The maximum size of a vertex array. This limit is imposed by WebGL's 16 bit\n * addressing of vertex buffers.\n */\nSegmentVector.MAX_VERTEX_ARRAY_LENGTH = Math.pow(2, 16) - 1;\n\nregister('SegmentVector', SegmentVector);\n","import {clamp} from '../util/util';\n\n/**\n * Packs two numbers, interpreted as 8-bit unsigned integers, into a single\n * float. Unpack them in the shader using the `unpack_float()` function,\n * defined in _prelude.vertex.glsl\n */\nexport function packUint8ToFloat(a: number, b: number) {\n // coerce a and b to 8-bit ints\n a = clamp(Math.floor(a), 0, 255);\n b = clamp(Math.floor(b), 0, 255);\n return 256 * a + b;\n}\n","import {createLayout} from '../../util/struct_array';\n\nexport const patternAttributes = createLayout([\n // [tl.x, tl.y, br.x, br.y]\n {name: 'a_pattern_from', components: 4, type: 'Uint16'},\n {name: 'a_pattern_to', components: 4, type: 'Uint16'},\n {name: 'a_pixel_ratio_from', components: 1, type: 'Uint16'},\n {name: 'a_pixel_ratio_to', components: 1, type: 'Uint16'},\n]);\n","import {createLayout} from '../../util/struct_array';\n\nexport const dashAttributes = createLayout([\n // [0, y, height, width]\n {name: 'a_dasharray_from', components: 4, type: 'Uint16'},\n {name: 'a_dasharray_to', components: 4, type: 'Uint16'},\n]);\n","var murmur3 = require(\"./murmurhash3_gc.js\")\nvar murmur2 = require(\"./murmurhash2_gc.js\")\n\nmodule.exports = murmur3\nmodule.exports.murmur3 = murmur3\nmodule.exports.murmur2 = murmur2\n","/**\n * JS Implementation of MurmurHash3 (r136) (as of May 20, 2011)\n * \n * @author Gary Court\n * @see http://github.com/garycourt/murmurhash-js\n * @author Austin Appleby\n * @see http://sites.google.com/site/murmurhash/\n * \n * @param {string} key ASCII only\n * @param {number} seed Positive integer only\n * @return {number} 32-bit positive integer hash \n */\n\nfunction murmurhash3_32_gc(key, seed) {\n\tvar remainder, bytes, h1, h1b, c1, c1b, c2, c2b, k1, i;\n\t\n\tremainder = key.length & 3; // key.length % 4\n\tbytes = key.length - remainder;\n\th1 = seed;\n\tc1 = 0xcc9e2d51;\n\tc2 = 0x1b873593;\n\ti = 0;\n\t\n\twhile (i < bytes) {\n\t \tk1 = \n\t \t ((key.charCodeAt(i) & 0xff)) |\n\t \t ((key.charCodeAt(++i) & 0xff) << 8) |\n\t \t ((key.charCodeAt(++i) & 0xff) << 16) |\n\t \t ((key.charCodeAt(++i) & 0xff) << 24);\n\t\t++i;\n\t\t\n\t\tk1 = ((((k1 & 0xffff) * c1) + ((((k1 >>> 16) * c1) & 0xffff) << 16))) & 0xffffffff;\n\t\tk1 = (k1 << 15) | (k1 >>> 17);\n\t\tk1 = ((((k1 & 0xffff) * c2) + ((((k1 >>> 16) * c2) & 0xffff) << 16))) & 0xffffffff;\n\n\t\th1 ^= k1;\n h1 = (h1 << 13) | (h1 >>> 19);\n\t\th1b = ((((h1 & 0xffff) * 5) + ((((h1 >>> 16) * 5) & 0xffff) << 16))) & 0xffffffff;\n\t\th1 = (((h1b & 0xffff) + 0x6b64) + ((((h1b >>> 16) + 0xe654) & 0xffff) << 16));\n\t}\n\t\n\tk1 = 0;\n\t\n\tswitch (remainder) {\n\t\tcase 3: k1 ^= (key.charCodeAt(i + 2) & 0xff) << 16;\n\t\tcase 2: k1 ^= (key.charCodeAt(i + 1) & 0xff) << 8;\n\t\tcase 1: k1 ^= (key.charCodeAt(i) & 0xff);\n\t\t\n\t\tk1 = (((k1 & 0xffff) * c1) + ((((k1 >>> 16) * c1) & 0xffff) << 16)) & 0xffffffff;\n\t\tk1 = (k1 << 15) | (k1 >>> 17);\n\t\tk1 = (((k1 & 0xffff) * c2) + ((((k1 >>> 16) * c2) & 0xffff) << 16)) & 0xffffffff;\n\t\th1 ^= k1;\n\t}\n\t\n\th1 ^= key.length;\n\n\th1 ^= h1 >>> 16;\n\th1 = (((h1 & 0xffff) * 0x85ebca6b) + ((((h1 >>> 16) * 0x85ebca6b) & 0xffff) << 16)) & 0xffffffff;\n\th1 ^= h1 >>> 13;\n\th1 = ((((h1 & 0xffff) * 0xc2b2ae35) + ((((h1 >>> 16) * 0xc2b2ae35) & 0xffff) << 16))) & 0xffffffff;\n\th1 ^= h1 >>> 16;\n\n\treturn h1 >>> 0;\n}\n\nif(typeof module !== \"undefined\") {\n module.exports = murmurhash3_32_gc\n}","/**\n * JS Implementation of MurmurHash2\n * \n * @author Gary Court\n * @see http://github.com/garycourt/murmurhash-js\n * @author Austin Appleby\n * @see http://sites.google.com/site/murmurhash/\n * \n * @param {string} str ASCII only\n * @param {number} seed Positive integer only\n * @return {number} 32-bit positive integer hash\n */\n\nfunction murmurhash2_32_gc(str, seed) {\n var\n l = str.length,\n h = seed ^ l,\n i = 0,\n k;\n \n while (l >= 4) {\n \tk = \n \t ((str.charCodeAt(i) & 0xff)) |\n \t ((str.charCodeAt(++i) & 0xff) << 8) |\n \t ((str.charCodeAt(++i) & 0xff) << 16) |\n \t ((str.charCodeAt(++i) & 0xff) << 24);\n \n k = (((k & 0xffff) * 0x5bd1e995) + ((((k >>> 16) * 0x5bd1e995) & 0xffff) << 16));\n k ^= k >>> 24;\n k = (((k & 0xffff) * 0x5bd1e995) + ((((k >>> 16) * 0x5bd1e995) & 0xffff) << 16));\n\n\th = (((h & 0xffff) * 0x5bd1e995) + ((((h >>> 16) * 0x5bd1e995) & 0xffff) << 16)) ^ k;\n\n l -= 4;\n ++i;\n }\n \n switch (l) {\n case 3: h ^= (str.charCodeAt(i + 2) & 0xff) << 16;\n case 2: h ^= (str.charCodeAt(i + 1) & 0xff) << 8;\n case 1: h ^= (str.charCodeAt(i) & 0xff);\n h = (((h & 0xffff) * 0x5bd1e995) + ((((h >>> 16) * 0x5bd1e995) & 0xffff) << 16));\n }\n\n h ^= h >>> 13;\n h = (((h & 0xffff) * 0x5bd1e995) + ((((h >>> 16) * 0x5bd1e995) & 0xffff) << 16));\n h ^= h >>> 15;\n\n return h >>> 0;\n}\n\nif(typeof module !== undefined) {\n module.exports = murmurhash2_32_gc\n}\n","import murmur3 from 'murmurhash-js';\nimport {register} from '../util/web_worker_transfer';\n\ntype SerializedFeaturePositionMap = {\n ids: Float64Array;\n positions: Uint32Array;\n};\n\ntype FeaturePosition = {\n index: number;\n start: number;\n end: number;\n};\n\n// A transferable data structure that maps feature ids to their indices and buffer offsets\nexport class FeaturePositionMap {\n ids: number[];\n positions: number[];\n indexed: boolean;\n\n constructor() {\n this.ids = [];\n this.positions = [];\n this.indexed = false;\n }\n\n add(id: unknown, index: number, start: number, end: number) {\n this.ids.push(getNumericId(id));\n this.positions.push(index, start, end);\n }\n\n getPositions(id: unknown): FeaturePosition[] {\n if (!this.indexed) throw new Error('Trying to get index, but feature positions are not indexed');\n\n const intId = getNumericId(id);\n\n // binary search for the first occurrence of id in this.ids;\n // relies on ids/positions being sorted by id, which happens in serialization\n let i = 0;\n let j = this.ids.length - 1;\n while (i < j) {\n const m = (i + j) >> 1;\n if (this.ids[m] >= intId) {\n j = m;\n } else {\n i = m + 1;\n }\n }\n const positions = [];\n while (this.ids[i] === intId) {\n const index = this.positions[3 * i];\n const start = this.positions[3 * i + 1];\n const end = this.positions[3 * i + 2];\n positions.push({index, start, end});\n i++;\n }\n return positions;\n }\n\n static serialize(map: FeaturePositionMap, transferables: ArrayBuffer[]): SerializedFeaturePositionMap {\n const ids = new Float64Array(map.ids);\n const positions = new Uint32Array(map.positions);\n\n sort(ids, positions, 0, ids.length - 1);\n\n if (transferables) {\n transferables.push(ids.buffer, positions.buffer);\n }\n\n return {ids, positions};\n }\n\n static deserialize(obj: SerializedFeaturePositionMap): FeaturePositionMap {\n const map = new FeaturePositionMap();\n // after transferring, we only use these arrays statically (no pushes),\n // so TypedArray vs Array distinction that flow points out doesn't matter\n map.ids = (obj.ids as any);\n map.positions = (obj.positions as any);\n map.indexed = true;\n return map;\n }\n}\n\nfunction getNumericId(value: unknown) {\n const numValue = +value;\n if (!isNaN(numValue) && numValue <= Number.MAX_SAFE_INTEGER) {\n return numValue;\n }\n return murmur3(String(value));\n}\n\n// custom quicksort that sorts ids, indices and offsets together (by ids)\n// uses Hoare partitioning & manual tail call optimization to avoid worst case scenarios\nfunction sort(ids, positions, left, right) {\n while (left < right) {\n const pivot = ids[(left + right) >> 1];\n let i = left - 1;\n let j = right + 1;\n\n while (true) {\n do i++; while (ids[i] < pivot);\n do j--; while (ids[j] > pivot);\n if (i >= j) break;\n swap(ids, i, j);\n swap(positions, 3 * i, 3 * j);\n swap(positions, 3 * i + 1, 3 * j + 1);\n swap(positions, 3 * i + 2, 3 * j + 2);\n }\n\n if (j - left < right - j) {\n sort(ids, positions, left, j);\n left = j + 1;\n } else {\n sort(ids, positions, j + 1, right);\n right = j;\n }\n }\n}\n\nfunction swap(arr, i, j) {\n const tmp = arr[i];\n arr[i] = arr[j];\n arr[j] = tmp;\n}\n\nregister('FeaturePositionMap', FeaturePositionMap);\n","import {Color} from '@maplibre/maplibre-gl-style-spec';\n\nimport type {Context} from './context';\nimport {type mat4, type vec2, type vec3, type vec4} from 'gl-matrix';\n\ntype $ObjMap any> = {\n [K in keyof T]: F extends (v: T[K]) => infer R ? R : never;\n};\n\nexport type UniformValues = $ObjMap(u: Uniform) => V>;\nexport type UniformLocations = {[_: string]: WebGLUniformLocation};\n\n/**\n * @internal\n * A base uniform abstract class\n */\nabstract class Uniform {\n gl: WebGLRenderingContext|WebGL2RenderingContext;\n location: WebGLUniformLocation;\n current: T;\n\n constructor(context: Context, location: WebGLUniformLocation) {\n this.gl = context.gl;\n this.location = location;\n }\n\n abstract set(v: T): void;\n}\n\nclass Uniform1i extends Uniform {\n constructor(context: Context, location: WebGLUniformLocation) {\n super(context, location);\n this.current = 0;\n }\n\n set(v: number): void {\n if (this.current !== v) {\n this.current = v;\n this.gl.uniform1i(this.location, v);\n }\n }\n}\n\nclass Uniform1f extends Uniform {\n constructor(context: Context, location: WebGLUniformLocation) {\n super(context, location);\n this.current = 0;\n }\n\n set(v: number): void {\n if (this.current !== v) {\n this.current = v;\n this.gl.uniform1f(this.location, v);\n }\n }\n}\n\nclass Uniform2f extends Uniform {\n constructor(context: Context, location: WebGLUniformLocation) {\n super(context, location);\n this.current = [0, 0];\n }\n\n set(v: vec2): void {\n if (v[0] !== this.current[0] || v[1] !== this.current[1]) {\n this.current = v;\n this.gl.uniform2f(this.location, v[0], v[1]);\n }\n }\n}\n\nclass Uniform3f extends Uniform {\n constructor(context: Context, location: WebGLUniformLocation) {\n super(context, location);\n this.current = [0, 0, 0];\n }\n\n set(v: vec3): void {\n if (v[0] !== this.current[0] || v[1] !== this.current[1] || v[2] !== this.current[2]) {\n this.current = v;\n this.gl.uniform3f(this.location, v[0], v[1], v[2]);\n }\n }\n}\n\nclass Uniform4f extends Uniform {\n constructor(context: Context, location: WebGLUniformLocation) {\n super(context, location);\n this.current = [0, 0, 0, 0];\n }\n\n set(v: vec4): void {\n if (v[0] !== this.current[0] || v[1] !== this.current[1] ||\n v[2] !== this.current[2] || v[3] !== this.current[3]) {\n this.current = v;\n this.gl.uniform4f(this.location, v[0], v[1], v[2], v[3]);\n }\n }\n}\n\nclass UniformColor extends Uniform {\n constructor(context: Context, location: WebGLUniformLocation) {\n super(context, location);\n this.current = Color.transparent;\n }\n\n set(v: Color): void {\n if (v.r !== this.current.r || v.g !== this.current.g ||\n v.b !== this.current.b || v.a !== this.current.a) {\n this.current = v;\n this.gl.uniform4f(this.location, v.r, v.g, v.b, v.a);\n }\n }\n}\n\nclass UniformColorArray extends Uniform {\n constructor(context: Context, location: WebGLUniformLocation) {\n super(context, location);\n this.current = new Array();\n }\n\n set(v: Color[]): void {\n if (v != this.current) {\n this.current = v;\n const values = new Float32Array(v.length*4);\n for( let i = 0; i < v.length; i++) {\n values[4*i] = v[i].r;\n values[4*i+1] = v[i].g;\n values[4*i+2] = v[i].b;\n values[4*i+3] = v[i].a;\n }\n this.gl.uniform4fv(this.location, values);\n }\n }\n}\n\nclass UniformFloatArray extends Uniform {\n constructor(context: Context, location: WebGLUniformLocation) {\n super(context, location);\n this.current = new Array();\n }\n\n set(v: number[]): void {\n if (v != this.current) {\n this.current = v;\n const values = new Float32Array(v);\n this.gl.uniform1fv(this.location, values);\n }\n }\n}\n\nconst emptyMat4 = new Float32Array(16) as mat4;\nclass UniformMatrix4f extends Uniform {\n constructor(context: Context, location: WebGLUniformLocation) {\n super(context, location);\n this.current = emptyMat4;\n }\n\n set(v: mat4): void {\n // The vast majority of matrix comparisons that will trip this set\n // happen at i=12 or i=0, so we check those first to avoid lots of\n // unnecessary iteration:\n if (v[12] !== this.current[12] || v[0] !== this.current[0]) {\n this.current = v;\n this.gl.uniformMatrix4fv(this.location, false, v);\n return;\n }\n for (let i = 1; i < 16; i++) {\n if (v[i] !== this.current[i]) {\n this.current = v;\n this.gl.uniformMatrix4fv(this.location, false, v);\n break;\n }\n }\n }\n}\n\nexport {\n Uniform,\n Uniform1i,\n Uniform1f,\n Uniform2f,\n Uniform3f,\n Uniform4f,\n UniformColor,\n UniformColorArray,\n UniformFloatArray,\n UniformMatrix4f\n};\n\n/**\n * @internal\n * A uniform bindings\n */\nexport type UniformBindings = {[_: string]: Uniform};\n","import {packUint8ToFloat} from '../shaders/encode_attribute';\nimport {type Color, supportsPropertyExpression} from '@maplibre/maplibre-gl-style-spec';\nimport {register} from '../util/web_worker_transfer';\nimport {PossiblyEvaluatedPropertyValue} from '../style/properties';\nimport {StructArrayLayout1f4, StructArrayLayout2f8, StructArrayLayout4f16, PatternLayoutArray, DashLayoutArray} from './array_types.g';\nimport {clamp} from '../util/util';\nimport {patternAttributes} from './bucket/pattern_attributes';\nimport {dashAttributes} from './bucket/dash_attributes';\nimport {EvaluationParameters} from '../style/evaluation_parameters';\nimport {FeaturePositionMap} from './feature_position_map';\nimport {type Uniform, Uniform1f, UniformColor, Uniform4f} from '../webgl/uniform_binding';\n\nimport type {UniformLocations} from '../webgl/uniform_binding';\n\nimport type {CanonicalTileID} from '../tile/tile_id';\nimport type {Context} from '../webgl/context';\nimport type {TypedStyleLayer} from '../style/style_layer/typed_style_layer';\nimport type {CrossfadeParameters} from '../style/evaluation_parameters';\nimport type {StructArray, StructArrayMember} from '../util/struct_array';\nimport type {VertexBuffer} from '../webgl/vertex_buffer';\nimport type {ImagePosition} from '../render/image_atlas';\nimport type {\n Feature,\n FeatureState,\n GlobalProperties,\n SourceExpression,\n CompositeExpression,\n FormattedSection\n} from '@maplibre/maplibre-gl-style-spec';\nimport type {FeatureStates} from '../source/source_state';\nimport type {DashEntry} from '../render/line_atlas';\nimport type {VectorTileLayerLike} from '@maplibre/vt-pbf';\n\nexport type BinderUniform = {\n name: string;\n property: string;\n binding: Uniform;\n};\n\nfunction packColor(color: Color): [number, number] {\n return [\n packUint8ToFloat(255 * color.r, 255 * color.g),\n packUint8ToFloat(255 * color.b, 255 * color.a)\n ];\n}\n\ntype PaintOptions = {\n imagePositions: {\n [_: string]: ImagePosition;\n };\n dashPositions?: {\n [_: string]: DashEntry;\n };\n canonical?: CanonicalTileID;\n formattedSection?: FormattedSection;\n globalState?: Record;\n};\n\n/**\n * `Binder` is the interface definition for the strategies for constructing,\n * uploading, and binding paint property data as GLSL attributes. Most style-\n * spec properties have a 1:1 relationship to shader attribute/uniforms, but\n * some require multiple values per feature to be passed to the GPU, and in\n * those cases we bind multiple attributes/uniforms.\n *\n * It has three implementations, one for each of the three strategies we use:\n *\n * * For _constant_ properties -- those whose value is a constant, or the constant\n * result of evaluating a camera expression at a particular camera position -- we\n * don't need a vertex attribute buffer, and instead use a uniform.\n * * For data expressions, we use a vertex buffer with a single attribute value,\n * the evaluated result of the source function for the given feature.\n * * For composite expressions, we use a vertex buffer with two attributes: min and\n * max values covering the range of zooms at which we expect the tile to be\n * displayed. These values are calculated by evaluating the composite expression for\n * the given feature at strategically chosen zoom levels. In addition to this\n * attribute data, we also use a uniform value which the shader uses to interpolate\n * between the min and max value at the final displayed zoom level. The use of a\n * uniform allows us to cheaply update the value on every frame.\n *\n * Note that the shader source varies depending on whether we're using a uniform or\n * attribute. We dynamically compile shaders at runtime to accommodate this.\n */\ninterface AttributeBinder {\n populatePaintArray(\n length: number,\n feature: Feature,\n options: PaintOptions\n ): void;\n updatePaintArray(\n start: number,\n length: number,\n feature: Feature,\n featureState: FeatureState,\n options: PaintOptions\n ): void;\n upload(a: Context): void;\n destroy(): void;\n}\n\ninterface UniformBinder {\n uniformNames: string[];\n setUniform(\n uniform: Uniform,\n globals: GlobalProperties,\n currentValue: PossiblyEvaluatedPropertyValue,\n uniformName: string\n ): void;\n getBinding(context: Context, location: WebGLUniformLocation, name: string): Partial>;\n}\n\nclass ConstantBinder implements UniformBinder {\n value: unknown;\n type: string;\n uniformNames: string[];\n\n constructor(value: unknown, names: string[], type: string) {\n this.value = value;\n this.uniformNames = names.map(name => `u_${name}`);\n this.type = type;\n }\n\n setUniform(\n uniform: Uniform,\n globals: GlobalProperties,\n currentValue: PossiblyEvaluatedPropertyValue\n ): void {\n uniform.set(currentValue.constantOr(this.value));\n }\n\n getBinding(context: Context, location: WebGLUniformLocation, _: string): Partial> {\n return (this.type === 'color') ?\n new UniformColor(context, location) :\n new Uniform1f(context, location);\n }\n}\n\nclass CrossFadedConstantBinder implements UniformBinder {\n uniformNames: string[];\n patternFrom: number[];\n patternTo: number[];\n dashFrom: number[];\n dashTo: number[];\n pixelRatioFrom: number;\n pixelRatioTo: number;\n\n constructor(value: unknown, names: string[]) {\n this.uniformNames = names.map(name => `u_${name}`);\n this.patternFrom = null;\n this.patternTo = null;\n this.pixelRatioFrom = 1.0;\n this.pixelRatioTo = 1.0;\n }\n\n setConstantPatternPositions(posTo: ImagePosition, posFrom: ImagePosition) {\n this.pixelRatioFrom = posFrom.pixelRatio;\n this.pixelRatioTo = posTo.pixelRatio;\n this.patternFrom = posFrom.tlbr;\n this.patternTo = posTo.tlbr;\n }\n\n setConstantDashPositions(dashTo: DashEntry, dashFrom: DashEntry) {\n this.dashTo = [0, dashTo.y, dashTo.height, dashTo.width];\n this.dashFrom = [0, dashFrom.y, dashFrom.height, dashFrom.width];\n }\n\n setUniform(uniform: Uniform, globals: GlobalProperties, currentValue: PossiblyEvaluatedPropertyValue, uniformName: string) {\n let value = null;\n\n if (uniformName === 'u_pattern_to') {\n value = this.patternTo;\n } else if (uniformName === 'u_pattern_from') {\n value = this.patternFrom;\n } else if (uniformName === 'u_dasharray_to') {\n value = this.dashTo;\n } else if (uniformName === 'u_dasharray_from') {\n value = this.dashFrom;\n } else if (uniformName === 'u_pixel_ratio_to') {\n value = this.pixelRatioTo;\n } else if (uniformName === 'u_pixel_ratio_from') {\n value = this.pixelRatioFrom;\n }\n\n if (value !== null) {\n uniform.set(value);\n }\n }\n\n getBinding(context: Context, location: WebGLUniformLocation, name: string): Partial> {\n return (name.startsWith('u_pattern') || name.startsWith('u_dasharray_')) ?\n new Uniform4f(context, location) :\n new Uniform1f(context, location);\n }\n}\n\nclass SourceExpressionBinder implements AttributeBinder {\n expression: SourceExpression;\n type: string;\n maxValue: number;\n\n paintVertexArray: StructArray;\n paintVertexAttributes: StructArrayMember[];\n paintVertexBuffer: VertexBuffer;\n\n constructor(expression: SourceExpression, names: string[], type: string, PaintVertexArray: {\n new (...args: any): StructArray;\n }) {\n this.expression = expression;\n this.type = type;\n this.maxValue = 0;\n this.paintVertexAttributes = names.map((name) => ({\n name: `a_${name}`,\n type: 'Float32',\n components: type === 'color' ? 2 : 1,\n offset: 0\n }));\n this.paintVertexArray = new PaintVertexArray();\n }\n\n populatePaintArray(newLength: number, feature: Feature, options: PaintOptions) {\n const start = this.paintVertexArray.length;\n const value = this.expression.evaluate(new EvaluationParameters(0, options), feature, {}, options.canonical, [], options.formattedSection);\n this.paintVertexArray.resize(newLength);\n this._setPaintValue(start, newLength, value);\n }\n\n updatePaintArray(start: number, end: number, feature: Feature, featureState: FeatureState, options: PaintOptions) {\n const value = this.expression.evaluate(new EvaluationParameters(0, options), feature, featureState);\n this._setPaintValue(start, end, value);\n }\n\n _setPaintValue(start, end, value) {\n if (this.type === 'color') {\n const color = packColor(value);\n for (let i = start; i < end; i++) {\n this.paintVertexArray.emplace(i, color[0], color[1]);\n }\n } else {\n for (let i = start; i < end; i++) {\n this.paintVertexArray.emplace(i, value);\n }\n this.maxValue = Math.max(this.maxValue, Math.abs(value));\n }\n }\n\n upload(context: Context) {\n if (this.paintVertexArray?.arrayBuffer.byteLength) {\n if (this.paintVertexBuffer?.buffer) {\n this.paintVertexBuffer.updateData(this.paintVertexArray);\n } else {\n this.paintVertexBuffer = context.createVertexBuffer(this.paintVertexArray, this.paintVertexAttributes, this.expression.isStateDependent);\n }\n }\n }\n\n destroy() {\n if (this.paintVertexBuffer) {\n this.paintVertexBuffer.destroy();\n }\n }\n}\n\nclass CompositeExpressionBinder implements AttributeBinder, UniformBinder {\n expression: CompositeExpression;\n uniformNames: string[];\n type: string;\n useIntegerZoom: boolean;\n zoom: number;\n maxValue: number;\n\n paintVertexArray: StructArray;\n paintVertexAttributes: StructArrayMember[];\n paintVertexBuffer: VertexBuffer;\n\n constructor(expression: CompositeExpression, names: string[], type: string, useIntegerZoom: boolean, zoom: number, PaintVertexArray: {\n new (...args: any): StructArray;\n }) {\n this.expression = expression;\n this.uniformNames = names.map(name => `u_${name}_t`);\n this.type = type;\n this.useIntegerZoom = useIntegerZoom;\n this.zoom = zoom;\n this.maxValue = 0;\n this.paintVertexAttributes = names.map((name) => ({\n name: `a_${name}`,\n type: 'Float32',\n components: type === 'color' ? 4 : 2,\n offset: 0\n }));\n this.paintVertexArray = new PaintVertexArray();\n }\n\n populatePaintArray(newLength: number, feature: Feature, options: PaintOptions) {\n const min = this.expression.evaluate(new EvaluationParameters(this.zoom, options), feature, {}, options.canonical, [], options.formattedSection);\n const max = this.expression.evaluate(new EvaluationParameters(this.zoom + 1, options), feature, {}, options.canonical, [], options.formattedSection);\n const start = this.paintVertexArray.length;\n this.paintVertexArray.resize(newLength);\n this._setPaintValue(start, newLength, min, max);\n }\n\n updatePaintArray(start: number, end: number, feature: Feature, featureState: FeatureState, options: PaintOptions) {\n const min = this.expression.evaluate(new EvaluationParameters(this.zoom, options), feature, featureState);\n const max = this.expression.evaluate(new EvaluationParameters(this.zoom + 1, options), feature, featureState);\n this._setPaintValue(start, end, min, max);\n }\n\n _setPaintValue(start, end, min, max) {\n if (this.type === 'color') {\n const minColor = packColor(min);\n const maxColor = packColor(max);\n for (let i = start; i < end; i++) {\n this.paintVertexArray.emplace(i, minColor[0], minColor[1], maxColor[0], maxColor[1]);\n }\n } else {\n for (let i = start; i < end; i++) {\n this.paintVertexArray.emplace(i, min, max);\n }\n this.maxValue = Math.max(this.maxValue, Math.abs(min), Math.abs(max));\n }\n }\n\n upload(context: Context) {\n if (this.paintVertexArray?.arrayBuffer.byteLength) {\n if (this.paintVertexBuffer?.buffer) {\n this.paintVertexBuffer.updateData(this.paintVertexArray);\n } else {\n this.paintVertexBuffer = context.createVertexBuffer(this.paintVertexArray, this.paintVertexAttributes, this.expression.isStateDependent);\n }\n }\n }\n\n destroy() {\n if (this.paintVertexBuffer) {\n this.paintVertexBuffer.destroy();\n }\n }\n\n setUniform(uniform: Uniform, globals: GlobalProperties): void {\n const currentZoom = this.useIntegerZoom ? Math.floor(globals.zoom) : globals.zoom;\n const factor = clamp(this.expression.interpolationFactor(currentZoom, this.zoom, this.zoom + 1), 0, 1);\n uniform.set(factor);\n }\n\n getBinding(context: Context, location: WebGLUniformLocation, _: string): Uniform1f {\n return new Uniform1f(context, location);\n }\n}\n\nabstract class CrossFadedBinder implements AttributeBinder {\n expression: CompositeExpression;\n type: string;\n useIntegerZoom: boolean;\n zoom: number;\n layerId: string;\n\n zoomInPaintVertexArray: StructArray;\n zoomOutPaintVertexArray: StructArray;\n zoomInPaintVertexBuffer: VertexBuffer;\n zoomOutPaintVertexBuffer: VertexBuffer;\n paintVertexAttributes: StructArrayMember[];\n\n constructor(expression: CompositeExpression, type: string, useIntegerZoom: boolean, zoom: number, PaintVertexArray: {\n new (...args: any): StructArray;\n }, layerId: string) {\n this.expression = expression;\n this.type = type;\n this.useIntegerZoom = useIntegerZoom;\n this.zoom = zoom;\n this.layerId = layerId;\n\n this.zoomInPaintVertexArray = new PaintVertexArray();\n this.zoomOutPaintVertexArray = new PaintVertexArray();\n }\n\n populatePaintArray(length: number, feature: Feature, options: PaintOptions) {\n const start = this.zoomInPaintVertexArray.length;\n this.zoomInPaintVertexArray.resize(length);\n this.zoomOutPaintVertexArray.resize(length);\n this._setPaintValues(start, length, this.getPositionIds(feature), options);\n }\n\n updatePaintArray(start: number, end: number, feature: Feature, featureState: FeatureState, options: PaintOptions) {\n this._setPaintValues(start, end, this.getPositionIds(feature), options);\n }\n\n abstract getVertexAttributes(): StructArrayMember[];\n\n protected abstract getPositionIds(feature: Feature): {min: string; mid: string; max: string};\n protected abstract getPositions(options: PaintOptions): {[_: string]: T};\n protected abstract emplace(array: StructArray, index: number, midPos: T, minMaxPos: T): void;\n\n protected _setPaintValues(start: number, end: number, positionIds: {min: string; mid: string; max: string}, options: PaintOptions) {\n const positions = this.getPositions(options);\n if (!positions || !positionIds) return;\n const min = positions[positionIds.min];\n const mid = positions[positionIds.mid];\n const max = positions[positionIds.max];\n if (!min || !mid || !max) return;\n\n // We populate two paint arrays because, for cross-faded properties, we don't know which direction\n // we're cross-fading to at layout time. In order to keep vertex attributes to a minimum and not pass\n // unnecessary vertex data to the shaders, we determine which to upload at draw time.\n for (let i = start; i < end; i++) {\n this.emplace(this.zoomInPaintVertexArray, i, mid, min);\n this.emplace(this.zoomOutPaintVertexArray, i, mid, max);\n }\n }\n\n upload(context: Context) {\n if (this.zoomInPaintVertexArray?.arrayBuffer.byteLength && this.zoomOutPaintVertexArray?.arrayBuffer.byteLength) {\n const attributes = this.getVertexAttributes();\n this.zoomInPaintVertexBuffer = context.createVertexBuffer(this.zoomInPaintVertexArray, attributes, this.expression.isStateDependent);\n this.zoomOutPaintVertexBuffer = context.createVertexBuffer(this.zoomOutPaintVertexArray, attributes, this.expression.isStateDependent);\n }\n }\n\n destroy() {\n if (this.zoomOutPaintVertexBuffer) this.zoomOutPaintVertexBuffer.destroy();\n if (this.zoomInPaintVertexBuffer) this.zoomInPaintVertexBuffer.destroy();\n }\n}\n\nclass CrossFadedPatternBinder extends CrossFadedBinder {\n protected getPositions(options: PaintOptions): {[_: string]: ImagePosition} {\n return options.imagePositions;\n }\n\n protected getPositionIds(feature: Feature) {\n return feature.patterns?.[this.layerId];\n }\n\n getVertexAttributes(): StructArrayMember[] {\n return patternAttributes.members;\n }\n\n protected emplace(array: StructArray, index: number, midPos: ImagePosition, minMaxPos: ImagePosition): void {\n array.emplace(index,\n midPos.tlbr[0], midPos.tlbr[1], midPos.tlbr[2], midPos.tlbr[3],\n minMaxPos.tlbr[0], minMaxPos.tlbr[1], minMaxPos.tlbr[2], minMaxPos.tlbr[3],\n midPos.pixelRatio,\n minMaxPos.pixelRatio,\n );\n }\n}\n\nclass CrossFadedDasharrayBinder extends CrossFadedBinder {\n protected getPositions(options: PaintOptions): {[_: string]: DashEntry} {\n return options.dashPositions;\n }\n\n protected getPositionIds(feature: Feature) {\n return feature.dashes?.[this.layerId];\n }\n\n getVertexAttributes(): StructArrayMember[] {\n return dashAttributes.members;\n }\n\n protected emplace(array: StructArray, index: number, midPos: DashEntry, minMaxPos: DashEntry): void {\n array.emplace(index,\n 0, midPos.y, midPos.height, midPos.width,\n 0, minMaxPos.y, minMaxPos.height, minMaxPos.width,\n );\n }\n}\n\n/**\n * @internal\n * ProgramConfiguration contains the logic for binding style layer properties and tile\n * layer feature data into GL program uniforms and vertex attributes.\n *\n * Non-data-driven property values are bound to shader uniforms. Data-driven property\n * values are bound to vertex attributes. In order to support a uniform GLSL syntax over\n * both, [Mapbox GL Shaders](https://github.com/mapbox/mapbox-gl-shaders) defines a `#pragma`\n * abstraction, which ProgramConfiguration is responsible for implementing. At runtime,\n * it examines the attributes of a particular layer, combines this with fixed knowledge\n * about how layers of the particular type are implemented, and determines which uniforms\n * and vertex attributes will be required. It can then substitute the appropriate text\n * into the shader source code, create and link a program, and bind the uniforms and\n * vertex attributes in preparation for drawing.\n *\n * When a vector tile is parsed, this same configuration information is used to\n * populate the attribute buffers needed for data-driven styling using the zoom\n * level and feature property data.\n */\nexport class ProgramConfiguration {\n binders: {[_: string]: AttributeBinder | UniformBinder};\n cacheKey: string;\n\n _buffers: VertexBuffer[];\n\n constructor(layer: TypedStyleLayer, zoom: number, filterProperties: (_: string) => boolean) {\n this.binders = {};\n this._buffers = [];\n\n const keys = [];\n\n for (const property in layer.paint._values) {\n if (!filterProperties(property)) continue;\n const value = (layer.paint as any).get(property);\n if (!(value instanceof PossiblyEvaluatedPropertyValue) || !supportsPropertyExpression(value.property.specification)) {\n continue;\n }\n const names = paintAttributeNames(property, layer.type);\n const expression = value.value;\n const type = value.property.specification.type;\n const useIntegerZoom = (value.property as any).useIntegerZoom;\n const propType = value.property.specification['property-type'];\n const isCrossFaded = propType === 'cross-faded' || propType === 'cross-faded-data-driven';\n\n if (expression.kind === 'constant') {\n this.binders[property] = isCrossFaded ?\n new CrossFadedConstantBinder(expression.value, names) :\n new ConstantBinder(expression.value, names, type);\n keys.push(`/u_${property}`);\n\n } else if (expression.kind === 'source' || isCrossFaded) {\n const StructArrayLayout = layoutType(property, type, 'source');\n this.binders[property] = isCrossFaded ?\n property === 'line-dasharray' ?\n new CrossFadedDasharrayBinder(expression as CompositeExpression, type, useIntegerZoom, zoom, StructArrayLayout, layer.id) :\n new CrossFadedPatternBinder(expression as CompositeExpression, type, useIntegerZoom, zoom, StructArrayLayout, layer.id) :\n new SourceExpressionBinder(expression as SourceExpression, names, type, StructArrayLayout);\n keys.push(`/a_${property}`);\n\n } else {\n const StructArrayLayout = layoutType(property, type, 'composite');\n this.binders[property] = new CompositeExpressionBinder(expression, names, type, useIntegerZoom, zoom, StructArrayLayout);\n keys.push(`/z_${property}`);\n }\n }\n\n this.cacheKey = keys.sort().join('');\n }\n\n getMaxValue(property: string): number {\n const binder = this.binders[property];\n return binder instanceof SourceExpressionBinder || binder instanceof CompositeExpressionBinder ? binder.maxValue : 0;\n }\n\n populatePaintArrays(newLength: number, feature: Feature, options: PaintOptions) {\n for (const property in this.binders) {\n const binder = this.binders[property];\n if (binder instanceof SourceExpressionBinder || binder instanceof CompositeExpressionBinder || binder instanceof CrossFadedBinder)\n binder.populatePaintArray(newLength, feature, options);\n }\n }\n setConstantPatternPositions(posTo: ImagePosition, posFrom: ImagePosition) {\n for (const property in this.binders) {\n const binder = this.binders[property];\n if (binder instanceof CrossFadedConstantBinder)\n binder.setConstantPatternPositions(posTo, posFrom);\n }\n }\n\n setConstantDashPositions(dashTo: DashEntry, dashFrom: DashEntry) {\n for (const property in this.binders) {\n const binder = this.binders[property];\n if (binder instanceof CrossFadedConstantBinder)\n binder.setConstantDashPositions(dashTo, dashFrom);\n }\n }\n\n updatePaintArrays(\n featureStates: FeatureStates,\n featureMap: FeaturePositionMap,\n vtLayer: VectorTileLayerLike,\n layer: TypedStyleLayer,\n options: PaintOptions\n ): boolean {\n let dirty: boolean = false;\n for (const id in featureStates) {\n const positions = featureMap.getPositions(id);\n\n for (const pos of positions) {\n const feature = vtLayer.feature(pos.index);\n\n for (const property in this.binders) {\n const binder = this.binders[property];\n if ((binder instanceof SourceExpressionBinder || binder instanceof CompositeExpressionBinder ||\n binder instanceof CrossFadedBinder) && binder.expression.isStateDependent === true) {\n //AHM: Remove after https://github.com/mapbox/mapbox-gl-js/issues/6255\n const value = (layer.paint as any).get(property);\n binder.expression = value.value;\n binder.updatePaintArray(pos.start, pos.end, feature, featureStates[id], options);\n dirty = true;\n }\n }\n }\n }\n return dirty;\n }\n\n defines(): string[] {\n const result = [];\n for (const property in this.binders) {\n const binder = this.binders[property];\n if (binder instanceof ConstantBinder || binder instanceof CrossFadedConstantBinder) {\n result.push(...binder.uniformNames.map(name => `#define HAS_UNIFORM_${name}`));\n }\n }\n return result;\n }\n\n getBinderAttributes(): string[] {\n const result = [];\n for (const property in this.binders) {\n const binder = this.binders[property];\n if (binder instanceof SourceExpressionBinder || binder instanceof CompositeExpressionBinder) {\n for (const attribute of binder.paintVertexAttributes) {\n result.push(attribute.name);\n }\n } else if (binder instanceof CrossFadedBinder) {\n const attributes = binder.getVertexAttributes();\n for (const attribute of attributes) {\n result.push(attribute.name);\n }\n }\n }\n return result;\n }\n\n getBinderUniforms(): string[] {\n const uniforms = [];\n for (const property in this.binders) {\n const binder = this.binders[property];\n if (binder instanceof ConstantBinder || binder instanceof CrossFadedConstantBinder || binder instanceof CompositeExpressionBinder) {\n for (const uniformName of binder.uniformNames) {\n uniforms.push(uniformName);\n }\n }\n }\n return uniforms;\n }\n\n getPaintVertexBuffers(): VertexBuffer[] {\n return this._buffers;\n }\n\n getUniforms(context: Context, locations: UniformLocations): BinderUniform[] {\n const uniforms = [];\n for (const property in this.binders) {\n const binder = this.binders[property];\n if (binder instanceof ConstantBinder || binder instanceof CrossFadedConstantBinder || binder instanceof CompositeExpressionBinder) {\n for (const name of binder.uniformNames) {\n if (locations[name]) {\n const binding = binder.getBinding(context, locations[name], name);\n uniforms.push({name, property, binding});\n }\n }\n }\n }\n return uniforms;\n }\n\n setUniforms(\n context: Context,\n binderUniforms: BinderUniform[],\n properties: any,\n globals: GlobalProperties\n ) {\n // Uniform state bindings are owned by the Program, but we set them\n // from within the ProgramConfiguration's binder members.\n for (const {name, property, binding} of binderUniforms) {\n (this.binders[property] as any).setUniform(binding, globals, properties.get(property), name);\n }\n }\n\n updatePaintBuffers(crossfade?: CrossfadeParameters) {\n this._buffers = [];\n\n for (const property in this.binders) {\n const binder = this.binders[property];\n if (crossfade && binder instanceof CrossFadedBinder) {\n const patternVertexBuffer = crossfade.fromScale === 2 ? binder.zoomInPaintVertexBuffer : binder.zoomOutPaintVertexBuffer;\n if (patternVertexBuffer) this._buffers.push(patternVertexBuffer);\n\n } else if ((binder instanceof SourceExpressionBinder || binder instanceof CompositeExpressionBinder) && binder.paintVertexBuffer) {\n this._buffers.push(binder.paintVertexBuffer);\n }\n }\n }\n\n upload(context: Context) {\n for (const property in this.binders) {\n const binder = this.binders[property];\n if (binder instanceof SourceExpressionBinder || binder instanceof CompositeExpressionBinder || binder instanceof CrossFadedBinder)\n binder.upload(context);\n }\n this.updatePaintBuffers();\n }\n\n destroy() {\n for (const property in this.binders) {\n const binder = this.binders[property];\n if (binder instanceof SourceExpressionBinder || binder instanceof CompositeExpressionBinder || binder instanceof CrossFadedBinder)\n binder.destroy();\n }\n }\n}\n\nexport class ProgramConfigurationSet {\n programConfigurations: {[_: string]: ProgramConfiguration};\n needsUpload: boolean;\n _featureMap: FeaturePositionMap;\n _bufferOffset: number;\n\n constructor(layers: readonly Layer[], zoom: number, filterProperties: (_: string) => boolean = () => true) {\n this.programConfigurations = {};\n for (const layer of layers) {\n this.programConfigurations[layer.id] = new ProgramConfiguration(layer, zoom, filterProperties);\n }\n this.needsUpload = false;\n this._featureMap = new FeaturePositionMap();\n this._bufferOffset = 0;\n }\n\n populatePaintArrays(length: number, feature: Feature, index: number, options: PaintOptions) {\n for (const key in this.programConfigurations) {\n this.programConfigurations[key].populatePaintArrays(length, feature, options);\n }\n\n if (feature.id !== undefined) {\n this._featureMap.add(feature.id, index, this._bufferOffset, length);\n }\n this._bufferOffset = length;\n\n this.needsUpload = true;\n }\n\n updatePaintArrays(featureStates: FeatureStates, vtLayer: VectorTileLayerLike, layers: readonly TypedStyleLayer[], options: PaintOptions) {\n for (const layer of layers) {\n this.needsUpload = this.programConfigurations[layer.id].updatePaintArrays(featureStates, this._featureMap, vtLayer, layer, options) || this.needsUpload;\n }\n }\n\n get(layerId: string) {\n return this.programConfigurations[layerId];\n }\n\n upload(context: Context) {\n if (!this.needsUpload) return;\n for (const layerId in this.programConfigurations) {\n this.programConfigurations[layerId].upload(context);\n }\n this.needsUpload = false;\n }\n\n destroy() {\n for (const layerId in this.programConfigurations) {\n this.programConfigurations[layerId].destroy();\n }\n }\n}\n\nfunction paintAttributeNames(property: string, type: string) {\n const attributeNameExceptions = {\n 'text-opacity': ['opacity'],\n 'icon-opacity': ['opacity'],\n 'text-color': ['fill_color'],\n 'icon-color': ['fill_color'],\n 'text-halo-color': ['halo_color'],\n 'icon-halo-color': ['halo_color'],\n 'text-halo-blur': ['halo_blur'],\n 'icon-halo-blur': ['halo_blur'],\n 'text-halo-width': ['halo_width'],\n 'icon-halo-width': ['halo_width'],\n 'line-gap-width': ['gapwidth'],\n 'line-dasharray': ['dasharray_to', 'dasharray_from'],\n 'line-pattern': ['pattern_to', 'pattern_from', 'pixel_ratio_to', 'pixel_ratio_from'],\n 'fill-pattern': ['pattern_to', 'pattern_from', 'pixel_ratio_to', 'pixel_ratio_from'],\n 'fill-extrusion-pattern': ['pattern_to', 'pattern_from', 'pixel_ratio_to', 'pixel_ratio_from'],\n };\n\n return attributeNameExceptions[property] || [property.replace(`${type}-`, '').replace(/-/g, '_')];\n}\n\nfunction getLayoutException(property: string) {\n const propertyExceptions = {\n 'line-pattern': {\n 'source': PatternLayoutArray,\n 'composite': PatternLayoutArray\n },\n 'fill-pattern': {\n 'source': PatternLayoutArray,\n 'composite': PatternLayoutArray\n },\n 'fill-extrusion-pattern': {\n 'source': PatternLayoutArray,\n 'composite': PatternLayoutArray\n },\n 'line-dasharray': {\n 'source': DashLayoutArray,\n 'composite': DashLayoutArray\n },\n };\n\n return propertyExceptions[property];\n}\n\nfunction layoutType(property: string, type: string, binderType: string) {\n const defaultLayouts = {\n 'color': {\n 'source': StructArrayLayout2f8,\n 'composite': StructArrayLayout4f16\n },\n 'number': {\n 'source': StructArrayLayout1f4,\n 'composite': StructArrayLayout2f8\n }\n };\n\n const layoutException = getLayoutException(property);\n return layoutException?.[binderType] || defaultLayouts[type][binderType];\n}\n\nregister('ConstantBinder', ConstantBinder);\nregister('CrossFadedConstantBinder', CrossFadedConstantBinder);\nregister('SourceExpressionBinder', SourceExpressionBinder);\nregister('CrossFadedPatternBinder', CrossFadedPatternBinder);\nregister('CrossFadedDasharrayBinder', CrossFadedDasharrayBinder);\nregister('CompositeExpressionBinder', CompositeExpressionBinder);\nregister('ProgramConfiguration', ProgramConfiguration, {omit: ['_buffers']});\nregister('ProgramConfigurationSet', ProgramConfigurationSet);\n","import {warnOnce, clamp} from '../util/util';\n\nimport {EXTENT} from './extent';\n\nimport type Point from '@mapbox/point-geometry';\nimport type {VectorTileFeatureLike} from '@maplibre/vt-pbf';\n\n// These bounds define the minimum and maximum supported coordinate values.\n// While visible coordinates are within [0, EXTENT], tiles may theoretically\n// contain coordinates within [-Infinity, Infinity]. Our range is limited by the\n// number of bits used to represent the coordinate.\nconst BITS = 15;\nconst MAX = Math.pow(2, BITS - 1) - 1;\nconst MIN = -MAX - 1;\n\n/**\n * Loads a geometry from a VectorTileFeatureLike and scales it to the common extent\n * used internally.\n * @param feature - the vector tile feature to load\n */\nexport function loadGeometry(feature: VectorTileFeatureLike): Point[][] {\n const scale = EXTENT / feature.extent;\n const geometry = feature.loadGeometry();\n for (const ring of geometry) {\n for (const point of ring) {\n // round here because mapbox-gl-native uses integers to represent\n // points and we need to do the same to avoid rendering differences.\n const x = Math.round(point.x * scale);\n const y = Math.round(point.y * scale);\n\n point.x = clamp(x, MIN, MAX);\n point.y = clamp(y, MIN, MAX);\n\n if (x < point.x || x > point.x + 1 || y < point.y || y > point.y + 1) {\n // warn when exceeding allowed extent except for the 1-px-off case\n // https://github.com/mapbox/mapbox-gl-js/issues/8992\n warnOnce('Geometry exceeds allowed extent, reduce your vector tile buffer size');\n }\n }\n }\n return geometry;\n}\n","import {loadGeometry} from './load_geometry';\nimport type Point from '@mapbox/point-geometry';\nimport type {Feature} from '@maplibre/maplibre-gl-style-spec';\nimport type {VectorTileFeatureLike} from '@maplibre/vt-pbf';\n\ntype EvaluationFeature = Feature & { geometry: Point[][] };\n/**\n * Construct a new feature based on a VectorTileFeatureLike for expression evaluation, the geometry of which\n * will be loaded based on necessity.\n * @param feature - the feature to evaluate\n * @param needGeometry - if set to true this will load the geometry\n */\nexport function toEvaluationFeature(feature: VectorTileFeatureLike, needGeometry: boolean): EvaluationFeature {\n return {type: feature.type,\n id: feature.id,\n properties: feature.properties,\n geometry: needGeometry ? loadGeometry(feature) : []};\n}\n","import {CircleLayoutArray} from '../array_types.g';\n\nimport {members as layoutAttributes} from './circle_attributes';\nimport {SegmentVector} from '../segment';\nimport {ProgramConfigurationSet} from '../program_configuration';\nimport {TriangleIndexArray} from '../index_array_type';\nimport {loadGeometry} from '../load_geometry';\nimport {toEvaluationFeature} from '../evaluation_feature';\nimport {EXTENT} from '../extent';\nimport {register} from '../../util/web_worker_transfer';\nimport {EvaluationParameters} from '../../style/evaluation_parameters';\n\nimport type {CanonicalTileID} from '../../tile/tile_id';\nimport type {\n Bucket,\n BucketParameters,\n BucketFeature,\n IndexedFeature,\n PopulateParameters\n} from '../bucket';\nimport type {CircleStyleLayer} from '../../style/style_layer/circle_style_layer';\nimport type {HeatmapStyleLayer} from '../../style/style_layer/heatmap_style_layer';\nimport type {Context} from '../../webgl/context';\nimport type {IndexBuffer} from '../../webgl/index_buffer';\nimport type {VertexBuffer} from '../../webgl/vertex_buffer';\nimport type Point from '@mapbox/point-geometry';\nimport type {FeatureStates} from '../../source/source_state';\nimport type {ImagePosition} from '../../render/image_atlas';\nimport {type CircleGranularity} from '../../render/subdivision_granularity_settings';\nimport type {VectorTileLayerLike} from '@maplibre/vt-pbf';\n\nconst VERTEX_MIN_VALUE = -32768; // -(2^15)\n\n// Extrude is in range 0..7, which will be mapped to -1..1 in the shader.\nfunction addCircleVertex(layoutVertexArray, x, y, extrudeX, extrudeY) {\n // We pack circle position and extrude into range 0..65535, but vertices are stored as *signed* 16-bit integers, so we need to offset the number by 2^15.\n layoutVertexArray.emplaceBack(\n VERTEX_MIN_VALUE + (x * 8) + extrudeX,\n VERTEX_MIN_VALUE + (y * 8) + extrudeY);\n}\n\n/**\n * @internal\n * Circles are represented by two triangles.\n *\n * Each corner has a pos that is the center of the circle and an extrusion\n * vector that is where it points.\n */\nexport class CircleBucket implements Bucket {\n index: number;\n zoom: number;\n overscaling: number;\n layerIds: string[];\n layers: Layer[];\n stateDependentLayers: Layer[];\n stateDependentLayerIds: string[];\n\n layoutVertexArray: CircleLayoutArray;\n layoutVertexBuffer: VertexBuffer;\n\n indexArray: TriangleIndexArray;\n indexBuffer: IndexBuffer;\n\n hasDependencies: boolean;\n programConfigurations: ProgramConfigurationSet;\n segments: SegmentVector;\n uploaded: boolean;\n\n constructor(options: BucketParameters) {\n this.zoom = options.zoom;\n this.overscaling = options.overscaling;\n this.layers = options.layers;\n this.layerIds = this.layers.map(layer => layer.id);\n this.index = options.index;\n this.hasDependencies = false;\n\n this.layoutVertexArray = new CircleLayoutArray();\n this.indexArray = new TriangleIndexArray();\n this.segments = new SegmentVector();\n this.programConfigurations = new ProgramConfigurationSet(options.layers, options.zoom);\n this.stateDependentLayerIds = this.layers.filter((l) => l.isStateDependent()).map((l) => l.id);\n }\n\n populate(features: IndexedFeature[], options: PopulateParameters, canonical: CanonicalTileID) {\n const styleLayer = this.layers[0];\n const bucketFeatures: BucketFeature[] = [];\n let circleSortKey = null;\n let sortFeaturesByKey = false;\n\n // Heatmap circles are usually large (and map-pitch-aligned), tessellate them to allow curvature along the globe.\n let subdivide = styleLayer.type === 'heatmap';\n\n // Heatmap layers are handled in this bucket and have no evaluated properties, so we check our access\n if (styleLayer.type === 'circle') {\n const circleStyle = (styleLayer as CircleStyleLayer);\n circleSortKey = circleStyle.layout.get('circle-sort-key');\n sortFeaturesByKey = !circleSortKey.isConstant();\n\n // Circles that are \"printed\" onto the map surface should be tessellated to follow the globe's curvature.\n subdivide ||= circleStyle.paint.get('circle-pitch-alignment') === 'map';\n }\n\n const granularity = subdivide ? options.subdivisionGranularity.circle : 1;\n\n for (const {feature, id, index, sourceLayerIndex} of features) {\n const needGeometry = this.layers[0]._featureFilter.needGeometry;\n const evaluationFeature = toEvaluationFeature(feature, needGeometry);\n\n if (!this.layers[0]._featureFilter.filter(new EvaluationParameters(this.zoom), evaluationFeature, canonical)) continue;\n\n const sortKey = sortFeaturesByKey ?\n circleSortKey.evaluate(evaluationFeature, {}, canonical) :\n undefined;\n\n const bucketFeature: BucketFeature = {\n id,\n properties: feature.properties,\n type: feature.type,\n sourceLayerIndex,\n index,\n geometry: needGeometry ? evaluationFeature.geometry : loadGeometry(feature),\n patterns: {},\n sortKey\n };\n\n bucketFeatures.push(bucketFeature);\n\n }\n\n if (sortFeaturesByKey) {\n bucketFeatures.sort((a, b) => a.sortKey - b.sortKey);\n }\n\n for (const bucketFeature of bucketFeatures) {\n const {geometry, index, sourceLayerIndex} = bucketFeature;\n const feature = features[index].feature;\n\n this.addFeature(bucketFeature, geometry, index, canonical, granularity);\n options.featureIndex.insert(feature, geometry, index, sourceLayerIndex, this.index);\n }\n }\n\n update(states: FeatureStates, vtLayer: VectorTileLayerLike, imagePositions: {[_: string]: ImagePosition}) {\n if (!this.stateDependentLayers.length) return;\n this.programConfigurations.updatePaintArrays(states, vtLayer, this.stateDependentLayers, {\n imagePositions\n });\n }\n\n isEmpty() {\n return this.layoutVertexArray.length === 0;\n }\n\n uploadPending() {\n return !this.uploaded || this.programConfigurations.needsUpload;\n }\n\n upload(context: Context) {\n if (!this.uploaded) {\n this.layoutVertexBuffer = context.createVertexBuffer(this.layoutVertexArray, layoutAttributes);\n this.indexBuffer = context.createIndexBuffer(this.indexArray);\n }\n this.programConfigurations.upload(context);\n this.uploaded = true;\n }\n\n destroy() {\n if (!this.layoutVertexBuffer) return;\n this.layoutVertexBuffer.destroy();\n this.indexBuffer.destroy();\n this.programConfigurations.destroy();\n this.segments.destroy();\n }\n\n addFeature(feature: BucketFeature, geometry: Point[][], index: number, canonical: CanonicalTileID, granularity: CircleGranularity = 1) {\n // Since we store the circle's center in each vertex, we only have 3 bits for actual vertex position in each axis.\n // Thus the valid range of positions is 0..7.\n // This gives us 4 possible granularity settings that are symmetrical.\n\n // This array stores vertex positions that should by used by the tessellated quad.\n let extrudes: number[];\n\n switch (granularity) {\n case 1:\n extrudes = [0, 7];\n break;\n case 3:\n extrudes = [0, 2, 5, 7];\n break;\n case 5:\n extrudes = [0, 1, 3, 4, 6, 7];\n break;\n case 7:\n extrudes = [0, 1, 2, 3, 4, 5, 6, 7];\n break;\n default:\n throw new Error(`Invalid circle bucket granularity: ${granularity}; valid values are 1, 3, 5, 7.`);\n }\n\n const verticesPerAxis = extrudes.length;\n\n for (const ring of geometry) {\n for (const point of ring) {\n const vx = point.x;\n const vy = point.y;\n\n // Do not include points that are outside the tile boundaries.\n if (vx < 0 || vx >= EXTENT || vy < 0 || vy >= EXTENT) {\n continue;\n }\n\n const segment = this.segments.prepareSegment(verticesPerAxis * verticesPerAxis, this.layoutVertexArray, this.indexArray, feature.sortKey);\n const index = segment.vertexLength;\n\n for (let y = 0; y < verticesPerAxis; y++) {\n for (let x = 0; x < verticesPerAxis; x++) {\n addCircleVertex(this.layoutVertexArray, vx, vy, extrudes[x], extrudes[y]);\n }\n }\n\n for (let y = 0; y < verticesPerAxis - 1; y++) {\n for (let x = 0; x < verticesPerAxis - 1; x++) {\n const lowerIndex = index + y * verticesPerAxis + x;\n const upperIndex = index + (y + 1) * verticesPerAxis + x;\n this.indexArray.emplaceBack(lowerIndex, upperIndex + 1, lowerIndex + 1);\n this.indexArray.emplaceBack(lowerIndex, upperIndex, upperIndex + 1);\n }\n }\n\n segment.vertexLength += verticesPerAxis * verticesPerAxis;\n segment.primitiveLength += (verticesPerAxis - 1) * (verticesPerAxis - 1) * 2;\n }\n }\n\n this.programConfigurations.populatePaintArrays(this.layoutVertexArray.length, feature, index, {imagePositions: {}, canonical});\n }\n}\n\nregister('CircleBucket', CircleBucket, {omit: ['layers']});\n","import {isCounterClockwise} from './util';\n\nimport Point from '@mapbox/point-geometry';\n\nexport {polygonIntersectsBufferedPoint, polygonIntersectsMultiPolygon, polygonIntersectsBufferedMultiLine, polygonIntersectsPolygon, distToSegmentSquared, polygonIntersectsBox};\n\ntype Line = Point[];\ntype MultiLine = Line[];\ntype Ring = Point[];\ntype Polygon = Point[];\ntype MultiPolygon = Polygon[];\n\nfunction polygonIntersectsPolygon(polygonA: Polygon, polygonB: Polygon) {\n for (const point of polygonA) {\n if (polygonContainsPoint(polygonB, point)) return true;\n }\n\n for (const point of polygonB) {\n if (polygonContainsPoint(polygonA, point)) return true;\n }\n\n return lineIntersectsLine(polygonA, polygonB);\n}\n\nfunction polygonIntersectsBufferedPoint(polygon: Polygon, point: Point, radius: number) {\n if (polygonContainsPoint(polygon, point)) return true;\n return pointIntersectsBufferedLine(point, polygon, radius);\n}\n\nfunction polygonIntersectsMultiPolygon(polygon: Polygon, multiPolygon: MultiPolygon) {\n\n if (polygon.length === 1) {\n return multiPolygonContainsPoint(multiPolygon, polygon[0]);\n }\n\n for (const ring of multiPolygon) {\n for (const point of ring) {\n if (polygonContainsPoint(polygon, point)) return true;\n }\n }\n\n for (const point of polygon) {\n if (multiPolygonContainsPoint(multiPolygon, point)) return true;\n }\n\n for (const ring of multiPolygon) {\n if (lineIntersectsLine(polygon, ring)) return true;\n }\n\n return false;\n}\n\nfunction polygonIntersectsBufferedMultiLine(polygon: Polygon, multiLine: MultiLine, radius: number) {\n for (const line of multiLine) {\n\n if (polygon.length >= 3) {\n for (const point of line) {\n if (polygonContainsPoint(polygon, point)) return true;\n }\n }\n\n if (lineIntersectsBufferedLine(polygon, line, radius)) return true;\n }\n return false;\n}\n\nfunction lineIntersectsBufferedLine(lineA: Line, lineB: Line, radius: number) {\n\n if (lineA.length > 1) {\n if (lineIntersectsLine(lineA, lineB)) return true;\n\n // Check whether any point in either line is within radius of the other line\n for (const point of lineB) {\n if (pointIntersectsBufferedLine(point, lineA, radius)) return true;\n }\n }\n\n for (const point of lineA) {\n if (pointIntersectsBufferedLine(point, lineB, radius)) return true;\n }\n\n return false;\n}\n\nfunction lineIntersectsLine(lineA: Line, lineB: Line) {\n if (lineA.length === 0 || lineB.length === 0) return false;\n for (let i = 0; i < lineA.length - 1; i++) {\n const a0 = lineA[i];\n const a1 = lineA[i + 1];\n for (let j = 0; j < lineB.length - 1; j++) {\n const b0 = lineB[j];\n const b1 = lineB[j + 1];\n if (lineSegmentIntersectsLineSegment(a0, a1, b0, b1)) return true;\n }\n }\n return false;\n}\n\nfunction lineSegmentIntersectsLineSegment(a0: Point, a1: Point, b0: Point, b1: Point) {\n return isCounterClockwise(a0, b0, b1) !== isCounterClockwise(a1, b0, b1) &&\n isCounterClockwise(a0, a1, b0) !== isCounterClockwise(a0, a1, b1);\n}\n\nfunction pointIntersectsBufferedLine(p: Point, line: Line, radius: number) {\n const radiusSquared = radius * radius;\n\n if (line.length === 1) return p.distSqr(line[0]) < radiusSquared;\n\n for (let i = 1; i < line.length; i++) {\n // Find line segments that have a distance <= radius^2 to p\n // In that case, we treat the line as \"containing point p\".\n const v = line[i - 1], w = line[i];\n if (distToSegmentSquared(p, v, w) < radiusSquared) return true;\n }\n return false;\n}\n\n// Code from https://stackoverflow.com/a/1501725/331379.\nfunction distToSegmentSquared(p: Point, v: Point, w: Point) {\n const l2 = v.distSqr(w);\n if (l2 === 0) return p.distSqr(v);\n const t = ((p.x - v.x) * (w.x - v.x) + (p.y - v.y) * (w.y - v.y)) / l2;\n if (t < 0) return p.distSqr(v);\n if (t > 1) return p.distSqr(w);\n return p.distSqr(w.sub(v)._mult(t)._add(v));\n}\n\n// point in polygon ray casting algorithm\nfunction multiPolygonContainsPoint(rings: Ring[], p: Point) {\n let c = false,\n ring, p1, p2;\n\n for (const currentRing of rings) {\n ring = currentRing;\n for (let i = 0, j = ring.length - 1; i < ring.length; j = i++) {\n p1 = ring[i];\n p2 = ring[j];\n if (((p1.y > p.y) !== (p2.y > p.y)) && (p.x < (p2.x - p1.x) * (p.y - p1.y) / (p2.y - p1.y) + p1.x)) {\n c = !c;\n }\n }\n }\n return c;\n}\n\nfunction polygonContainsPoint(ring: Ring, p: Point) {\n let c = false;\n for (let i = 0, j = ring.length - 1; i < ring.length; j = i++) {\n const p1 = ring[i];\n const p2 = ring[j];\n if (((p1.y > p.y) !== (p2.y > p.y)) && (p.x < (p2.x - p1.x) * (p.y - p1.y) / (p2.y - p1.y) + p1.x)) {\n c = !c;\n }\n }\n return c;\n}\n\nfunction polygonIntersectsBox(ring: Ring, boxX1: number, boxY1: number, boxX2: number, boxY2: number) {\n for (const p of ring) {\n if (boxX1 <= p.x &&\n boxY1 <= p.y &&\n boxX2 >= p.x &&\n boxY2 >= p.y) return true;\n }\n\n const corners = [\n new Point(boxX1, boxY1),\n new Point(boxX1, boxY2),\n new Point(boxX2, boxY2),\n new Point(boxX2, boxY1)];\n\n if (ring.length > 2) {\n for (const corner of corners) {\n if (polygonContainsPoint(ring, corner)) return true;\n }\n }\n\n for (let i = 0; i < ring.length - 1; i++) {\n const p1 = ring[i];\n const p2 = ring[i + 1];\n if (edgeIntersectsBox(p1, p2, corners)) return true;\n }\n\n return false;\n}\n\nfunction edgeIntersectsBox(e1: Point, e2: Point, corners: Point[]) {\n const tl = corners[0];\n const br = corners[2];\n // the edge and box do not intersect in either the x or y dimensions\n if (((e1.x < tl.x) && (e2.x < tl.x)) ||\n ((e1.x > br.x) && (e2.x > br.x)) ||\n ((e1.y < tl.y) && (e2.y < tl.y)) ||\n ((e1.y > br.y) && (e2.y > br.y))) return false;\n\n // check if all corners of the box are on the same side of the edge\n const dir = isCounterClockwise(e1, e2, corners[0]);\n return dir !== isCounterClockwise(e1, e2, corners[1]) ||\n dir !== isCounterClockwise(e1, e2, corners[2]) ||\n dir !== isCounterClockwise(e1, e2, corners[3]);\n}\n","import Point from '@mapbox/point-geometry';\n\nimport type {PossiblyEvaluatedPropertyValue} from './properties';\nimport type {StyleLayer} from '../style/style_layer';\nimport type {CircleBucket} from '../data/bucket/circle_bucket';\nimport type {LineBucket} from '../data/bucket/line_bucket';\nimport {polygonIntersectsBufferedPoint} from '../util/intersection_tests';\nimport type {IReadonlyTransform} from '../geo/transform_interface';\nimport type {UnwrappedTileID} from '../tile/tile_id';\n\nexport function getMaximumPaintValue(\n property: string,\n layer: StyleLayer,\n bucket: CircleBucket | LineBucket\n): number {\n const value = ((layer.paint as any).get(property) as PossiblyEvaluatedPropertyValue).value;\n if (value.kind === 'constant') {\n return value.value;\n } else {\n return bucket.programConfigurations.get(layer.id).getMaxValue(property);\n }\n}\n\nexport function translateDistance(translate: [number, number]) {\n return Math.sqrt(translate[0] * translate[0] + translate[1] * translate[1]);\n}\n\n/**\n * @internal\n * Translates a geometry by a certain pixels in tile coordinates\n * @param queryGeometry - The geometry to translate in tile coordinates\n * @param translate - The translation in pixels\n * @param translateAnchor - The anchor of the translation\n * @param bearing - The bearing of the map\n * @param pixelsToTileUnits - The scale factor from pixels to tile units\n * @returns the translated geometry in tile coordinates\n */\nexport function translate(queryGeometry: Point[],\n translate: [number, number],\n translateAnchor: 'viewport' | 'map',\n bearing: number,\n pixelsToTileUnits: number): Point[] {\n if (!translate[0] && !translate[1]) {\n return queryGeometry;\n }\n const pt = Point.convert(translate)._mult(pixelsToTileUnits);\n\n if (translateAnchor === 'viewport') {\n pt._rotate(-bearing);\n }\n\n const translated: Point[] = [];\n for (const point of queryGeometry) {\n translated.push(point.sub(pt));\n }\n return translated;\n}\n\n/**\n * Filter out consecutive duplicate points from a line\n */\nfunction _stripDuplicates(ring: Point[]): Point[] {\n const filteredRing: Point[] = [];\n for (let index = 0; index < ring.length; index++) {\n const point = ring[index];\n const prevPoint = filteredRing.at(-1);\n if (index === 0 || (prevPoint && !(point.equals(prevPoint)))) {\n filteredRing.push(point);\n }\n }\n return filteredRing;\n}\n\nexport function offsetLine(rings: Point[][], offset: number) {\n const newRings: Point[][] = [];\n for (const rawRing of rings) {\n const ring = _stripDuplicates(rawRing);\n const newRing: Point[] = [];\n for (let index = 0; index < ring.length; index++) {\n const point = ring[index];\n const prevPoint = ring[index - 1];\n const nextPoint = ring[index + 1];\n // perpendicular unit vectors (outward unit normal vector):\n // these indicate which direction the segments should be offset in\n const unitNormalAB: Point = index === 0 ? new Point(0, 0) : point.sub(prevPoint)._unit()._perp();\n const unitNormalBC: Point = index === ring.length - 1 ? new Point(0, 0) : nextPoint.sub(point)._unit()._perp();\n // unit bisector direction\n const bisectorDir = unitNormalAB._add(unitNormalBC)._unit();\n const cosHalfAngle = bisectorDir.x * unitNormalBC.x + bisectorDir.y * unitNormalBC.y;\n if (cosHalfAngle !== 0) {\n bisectorDir._mult(1 / cosHalfAngle);\n }\n newRing.push(bisectorDir._mult(offset)._add(point));\n }\n newRings.push(newRing);\n }\n return newRings;\n}\n\ntype CircleIntersectionTestParams = {\n queryGeometry: Point[];\n size: number;\n transform: IReadonlyTransform;\n unwrappedTileID: UnwrappedTileID;\n getElevation: undefined | ((x: number, y: number) => number);\n pitchAlignment?: 'map' | 'viewport';\n pitchScale?: 'map' | 'viewport';\n};\n\nfunction intersectionTestMapMap({queryGeometry, size}: CircleIntersectionTestParams, point: Point): boolean {\n return polygonIntersectsBufferedPoint(queryGeometry, point, size);\n}\n\nfunction intersectionTestMapViewport({queryGeometry, size, transform, unwrappedTileID, getElevation}: CircleIntersectionTestParams, point: Point): boolean {\n const w = transform.projectTileCoordinates(point.x, point.y, unwrappedTileID, getElevation).signedDistanceFromCamera;\n const adjustedSize = size * (w / transform.cameraToCenterDistance);\n return polygonIntersectsBufferedPoint(queryGeometry, point, adjustedSize);\n}\n\nfunction intersectionTestViewportMap({queryGeometry, size, transform, unwrappedTileID, getElevation}: CircleIntersectionTestParams, point: Point): boolean {\n const w = transform.projectTileCoordinates(point.x, point.y, unwrappedTileID, getElevation).signedDistanceFromCamera;\n const adjustedSize = size * (transform.cameraToCenterDistance / w);\n return polygonIntersectsBufferedPoint(queryGeometry, projectPoint(point, transform, unwrappedTileID, getElevation), adjustedSize);\n}\n\nfunction intersectionTestViewportViewport({queryGeometry, size, transform, unwrappedTileID, getElevation}: CircleIntersectionTestParams, point: Point): boolean {\n return polygonIntersectsBufferedPoint(queryGeometry, projectPoint(point, transform, unwrappedTileID, getElevation), size);\n}\n\nexport function circleIntersection({\n queryGeometry,\n size,\n transform,\n unwrappedTileID,\n getElevation,\n pitchAlignment = 'map',\n pitchScale = 'map'\n}: CircleIntersectionTestParams, geometry): boolean {\n const intersectionTest = pitchAlignment === 'map'\n ? (pitchScale === 'map' ? intersectionTestMapMap : intersectionTestMapViewport)\n : (pitchScale === 'map' ? intersectionTestViewportMap : intersectionTestViewportViewport);\n\n const param = {queryGeometry, size, transform, unwrappedTileID, getElevation} as CircleIntersectionTestParams;\n for (const ring of geometry) {\n for (const point of ring) {\n if (intersectionTest(param, point)) {\n return true;\n }\n }\n }\n return false;\n}\n\nfunction projectPoint(tilePoint: Point, transform: IReadonlyTransform, unwrappedTileID: UnwrappedTileID, getElevation: undefined | ((x: number, y: number) => number)): Point {\n // Convert `tilePoint` from tile coordinates to clip coordinates.\n const clipPoint = transform.projectTileCoordinates(tilePoint.x, tilePoint.y, unwrappedTileID, getElevation).point;\n // Convert `clipPoint` from clip coordinates into pixel/screen coordinates.\n return new Point(\n (clipPoint.x * 0.5 + 0.5) * transform.width,\n (-clipPoint.y * 0.5 + 0.5) * transform.height\n );\n}\n\nexport function projectQueryGeometry(queryGeometry: Point[], transform: IReadonlyTransform, unwrappedTileID: UnwrappedTileID, getElevation: undefined | ((x: number, y: number) => number)) {\n return queryGeometry.map((p) => {\n return projectPoint(p, transform, unwrappedTileID, getElevation);\n });\n}\n","// This file is generated. Edit build/generate-style-code.ts, then run 'npm run codegen'.\n/* eslint-disable */\n\nimport {latest as styleSpec} from '@maplibre/maplibre-gl-style-spec';\n\nimport {\n Properties,\n DataConstantProperty,\n DataDrivenProperty,\n CrossFadedDataDrivenProperty,\n CrossFadedProperty,\n ColorRampProperty,\n PossiblyEvaluatedPropertyValue,\n CrossFaded\n} from '../properties';\n\nimport type {Color, Formatted, Padding, NumberArray, ColorArray, ResolvedImage, VariableAnchorOffsetCollection} from '@maplibre/maplibre-gl-style-spec';\nimport {StylePropertySpecification} from '@maplibre/maplibre-gl-style-spec';\n\nexport type CircleLayoutProps = {\n \"circle-sort-key\": DataDrivenProperty,\n};\n\nexport type CircleLayoutPropsPossiblyEvaluated = {\n \"circle-sort-key\": PossiblyEvaluatedPropertyValue,\n};\n\nlet layout: Properties;\nconst getLayout = () => layout = layout || new Properties({\n \"circle-sort-key\": new DataDrivenProperty(styleSpec[\"layout_circle\"][\"circle-sort-key\"] as any as StylePropertySpecification),\n});\n\nexport type CirclePaintProps = {\n \"circle-radius\": DataDrivenProperty,\n \"circle-color\": DataDrivenProperty,\n \"circle-blur\": DataDrivenProperty