{
  "version": 3,
  "sources": ["../src/index.ts", "../src/lib/draco-module-loader.ts", "../src/draco-writer.ts", "../src/lib/draco-builder.ts", "../src/lib/utils/version.ts", "../src/draco-loader.ts", "../src/lib/draco-parser.ts", "../src/lib/utils/get-draco-schema.ts", "../src/draco-arrow-loader.ts"],
  "sourcesContent": ["// loaders.gl\n// SPDX-License-Identifier: MIT\n// Copyright (c) vis.gl contributors\n\n// Module constants\nexport {DRACO_EXTERNAL_LIBRARIES, DRACO_EXTERNAL_LIBRARY_URLS} from './lib/draco-module-loader';\n\n// Draco data types\n\nexport type {DracoMesh, DracoLoaderData} from './lib/draco-types';\n\n// Draco Writer\n\nexport type {DracoWriterOptions} from './draco-writer';\nexport {DracoWriterWorker, DracoWriter} from './draco-writer';\n\n// Draco Loader\n\nexport type {DracoLoaderOptions} from './draco-loader';\nexport {DracoWorkerLoader, DracoLoader} from './draco-loader';\nexport {DracoArrowLoader} from './draco-arrow-loader';\n", "// Dynamic DRACO module loading inspired by THREE.DRACOLoader\n// https://github.com/mrdoob/three.js/blob/398c4f39ebdb8b23eefd4a7a5ec49ec0c96c7462/examples/jsm/loaders/DRACOLoader.js\n// by Don McCurdy / https://www.donmccurdy.com / MIT license\n\nimport {isBrowser, loadLibrary, type LoadLibraryOptions} from '@loaders.gl/worker-utils';\n\nconst DRACO_DECODER_VERSION = '1.5.6';\nconst DRACO_ENCODER_VERSION = '1.4.1';\n\nconst STATIC_DECODER_URL = `https://www.gstatic.com/draco/versioned/decoders/${DRACO_DECODER_VERSION}`;\n\nexport const DRACO_EXTERNAL_LIBRARIES = {\n  /** The primary Draco3D encoder, javascript wrapper part */\n  DECODER: 'draco_wasm_wrapper.js',\n  /** The primary draco decoder, compiled web assembly part */\n  DECODER_WASM: 'draco_decoder.wasm',\n  /** Fallback decoder for non-webassebly environments. Very big bundle, lower performance */\n  FALLBACK_DECODER: 'draco_decoder.js',\n  /** Draco encoder */\n  ENCODER: 'draco_encoder.js'\n};\n\nexport const DRACO_EXTERNAL_LIBRARY_URLS = {\n  [DRACO_EXTERNAL_LIBRARIES.DECODER]: `${STATIC_DECODER_URL}/${DRACO_EXTERNAL_LIBRARIES.DECODER}`,\n  [DRACO_EXTERNAL_LIBRARIES.DECODER_WASM]: `${STATIC_DECODER_URL}/${DRACO_EXTERNAL_LIBRARIES.DECODER_WASM}`,\n  [DRACO_EXTERNAL_LIBRARIES.FALLBACK_DECODER]: `${STATIC_DECODER_URL}/${DRACO_EXTERNAL_LIBRARIES.FALLBACK_DECODER}`,\n  [DRACO_EXTERNAL_LIBRARIES.ENCODER]: `https://raw.githubusercontent.com/google/draco/${DRACO_ENCODER_VERSION}/javascript/${DRACO_EXTERNAL_LIBRARIES.ENCODER}`\n};\n\nlet loadDecoderPromise;\nlet loadEncoderPromise;\n\nexport async function loadDracoDecoderModule(\n  options: LoadLibraryOptions = {},\n  type: 'wasm' | 'js'\n) {\n  const modules = options.modules || {};\n\n  // Check if a bundled draco3d library has been supplied by application\n  if (modules.draco3d) {\n    loadDecoderPromise ||= modules.draco3d.createDecoderModule({}).then((draco) => {\n      return {draco};\n    });\n  } else {\n    // If not, dynamically load the WASM script from our CDN\n    loadDecoderPromise ||= loadDracoDecoder(options, type);\n  }\n  return await loadDecoderPromise;\n}\n\nexport async function loadDracoEncoderModule(options: LoadLibraryOptions) {\n  const modules = options.modules || {};\n\n  // Check if a bundled draco3d library has been supplied by application\n  if (modules.draco3d) {\n    loadEncoderPromise ||= modules.draco3d.createEncoderModule({}).then((draco) => {\n      return {draco};\n    });\n  } else {\n    // If not, dynamically load the WASM script from our CDN\n    loadEncoderPromise ||= loadDracoEncoder(options);\n  }\n  return await loadEncoderPromise;\n}\n\nfunction getLibraryExport(library: any, exportName: string): any {\n  if (library && typeof library === 'object') {\n    if (library.default) {\n      return library.default;\n    }\n    if (library[exportName]) {\n      return library[exportName];\n    }\n  }\n  return library;\n}\n\n// DRACO DECODER LOADING\n/** @todo - type the options, they are inconsistent */\nasync function loadDracoDecoder(options: LoadLibraryOptions, type: 'wasm' | 'js') {\n  let DracoDecoderModule;\n  let wasmBinary;\n  switch (type) {\n    case 'js':\n      DracoDecoderModule = await loadLibrary(\n        DRACO_EXTERNAL_LIBRARY_URLS[DRACO_EXTERNAL_LIBRARIES.FALLBACK_DECODER],\n        'draco',\n        options,\n        DRACO_EXTERNAL_LIBRARIES.FALLBACK_DECODER\n      );\n      break;\n\n    case 'wasm':\n    default:\n      try {\n        [DracoDecoderModule, wasmBinary] = await Promise.all([\n          await loadLibrary(\n            DRACO_EXTERNAL_LIBRARY_URLS[DRACO_EXTERNAL_LIBRARIES.DECODER],\n            'draco',\n            options,\n            DRACO_EXTERNAL_LIBRARIES.DECODER\n          ),\n          await loadLibrary(\n            DRACO_EXTERNAL_LIBRARY_URLS[DRACO_EXTERNAL_LIBRARIES.DECODER_WASM],\n            'draco',\n            options,\n            DRACO_EXTERNAL_LIBRARIES.DECODER_WASM\n          )\n        ]);\n      } catch {\n        DracoDecoderModule = null;\n        wasmBinary = null;\n      }\n  }\n  DracoDecoderModule = getLibraryExport(DracoDecoderModule, 'DracoDecoderModule');\n  // @ts-ignore\n  DracoDecoderModule = DracoDecoderModule || globalThis.DracoDecoderModule;\n\n  // In Node environments without network access, fall back to local copies in the repo.\n  if (!DracoDecoderModule && !isBrowser) {\n    [DracoDecoderModule, wasmBinary] = await Promise.all([\n      await loadLibrary(\n        DRACO_EXTERNAL_LIBRARY_URLS[DRACO_EXTERNAL_LIBRARIES.DECODER],\n        'draco',\n        {...options, useLocalLibraries: true},\n        DRACO_EXTERNAL_LIBRARIES.DECODER\n      ),\n      await loadLibrary(\n        DRACO_EXTERNAL_LIBRARY_URLS[DRACO_EXTERNAL_LIBRARIES.DECODER_WASM],\n        'draco',\n        {...options, useLocalLibraries: true},\n        DRACO_EXTERNAL_LIBRARIES.DECODER_WASM\n      )\n    ]);\n    DracoDecoderModule = getLibraryExport(DracoDecoderModule, 'DracoDecoderModule');\n    // @ts-ignore\n    DracoDecoderModule = DracoDecoderModule || globalThis.DracoDecoderModule;\n  }\n\n  return await initializeDracoDecoder(DracoDecoderModule, wasmBinary);\n}\n\nfunction initializeDracoDecoder(DracoDecoderModule, wasmBinary) {\n  if (typeof DracoDecoderModule !== 'function') {\n    throw new Error('DracoDecoderModule could not be loaded');\n  }\n\n  const options: {wasmBinary?: any} = {};\n  if (wasmBinary) {\n    options.wasmBinary = wasmBinary;\n  }\n\n  return new Promise((resolve) => {\n    DracoDecoderModule({\n      ...options,\n      onModuleLoaded: (draco) => resolve({draco}) // Module is Promise-like. Wrap in object to avoid loop.\n    });\n  });\n}\n\n// ENCODER\n\nasync function loadDracoEncoder(options: LoadLibraryOptions) {\n  let DracoEncoderModule = await loadLibrary(\n    DRACO_EXTERNAL_LIBRARY_URLS[DRACO_EXTERNAL_LIBRARIES.ENCODER],\n    'draco',\n    options,\n    DRACO_EXTERNAL_LIBRARIES.ENCODER\n  );\n  DracoEncoderModule = getLibraryExport(DracoEncoderModule, 'DracoEncoderModule');\n  // @ts-ignore\n  DracoEncoderModule = DracoEncoderModule || globalThis.DracoEncoderModule;\n\n  // In Node environments without network access, fall back to local copies in the repo.\n  if (!DracoEncoderModule && !isBrowser) {\n    DracoEncoderModule = await loadLibrary(\n      DRACO_EXTERNAL_LIBRARY_URLS[DRACO_EXTERNAL_LIBRARIES.ENCODER],\n      'draco',\n      {...options, useLocalLibraries: true},\n      DRACO_EXTERNAL_LIBRARIES.ENCODER\n    );\n    DracoEncoderModule = getLibraryExport(DracoEncoderModule, 'DracoEncoderModule');\n    // @ts-ignore\n    DracoEncoderModule = DracoEncoderModule || globalThis.DracoEncoderModule;\n  }\n\n  if (typeof DracoEncoderModule !== 'function') {\n    throw new Error('DracoEncoderModule could not be loaded');\n  }\n\n  return new Promise((resolve) => {\n    DracoEncoderModule({\n      onModuleLoaded: (draco) => resolve({draco}) // Module is Promise-like. Wrap in object to avoid loop.\n    });\n  });\n}\n", "// loaders.gl\n// SPDX-License-Identifier: MIT\n// Copyright (c) vis.gl contributors\n\nimport type {WriterWithEncoder, WriterOptions} from '@loaders.gl/loader-utils';\nimport {extractLoadLibraryOptions} from '@loaders.gl/worker-utils';\nimport type {DracoMesh} from './lib/draco-types';\nimport type {DracoBuildOptions} from './lib/draco-builder';\nimport DRACOBuilder from './lib/draco-builder';\nimport {loadDracoEncoderModule} from './lib/draco-module-loader';\nimport {VERSION} from './lib/utils/version';\n\n/** Writer Options for draco */\nexport type DracoWriterOptions = WriterOptions & {\n  draco?: DracoBuildOptions & {\n    method?: 'MESH_EDGEBREAKER_ENCODING' | 'MESH_SEQUENTIAL_ENCODING';\n    speed?: [number, number];\n    quantization?: Record<string, number>;\n    attributeNameEntry?: string;\n  };\n};\n\nconst DEFAULT_DRACO_WRITER_OPTIONS = {\n  pointcloud: false, // Set to true if pointcloud (mode: 0, no indices)\n  attributeNameEntry: 'name'\n  // Draco Compression Parameters\n  // method: 'MESH_EDGEBREAKER_ENCODING', // Use draco defaults\n  // speed: [5, 5], // Use draco defaults\n  // quantization: { // Use draco defaults\n  //   POSITION: 10\n  // }\n};\n\n/**\n * Browser worker doesn't work because of issue during \"draco_encoder.js\" loading.\n * Refused to execute script from 'https://raw.githubusercontent.com/google/draco/1.4.1/javascript/draco_encoder.js' because its MIME type ('') is not executable.\n */\nexport const DracoWriterWorker = {\n  id: 'draco-writer',\n  name: 'Draco compressed geometry writer',\n  module: 'draco',\n  version: VERSION,\n  worker: true,\n  options: {\n    draco: {},\n    source: null\n  }\n};\n\n/**\n * Exporter for Draco3D compressed geometries\n */\nexport const DracoWriter = {\n  name: 'DRACO',\n  id: 'draco',\n  module: 'draco',\n  version: VERSION,\n  extensions: ['drc'],\n  mimeTypes: ['application/octet-stream'],\n  options: {\n    draco: DEFAULT_DRACO_WRITER_OPTIONS\n  },\n  encode\n} as const satisfies WriterWithEncoder<DracoMesh, unknown, DracoWriterOptions>;\n\nasync function encode(data: DracoMesh, options: DracoWriterOptions = {}): Promise<ArrayBuffer> {\n  // Dynamically load draco\n  const {draco} = await loadDracoEncoderModule(extractLoadLibraryOptions(options));\n  const dracoBuilder = new DRACOBuilder(draco);\n\n  try {\n    return dracoBuilder.encodeSync(data, options.draco);\n  } finally {\n    dracoBuilder.destroy();\n  }\n}\n", "/* eslint-disable camelcase */\n// This code is inspired by example code in the DRACO repository\nimport type {\n  Draco3D,\n  DracoInt8Array,\n  Encoder,\n  Mesh,\n  MeshBuilder,\n  PointCloud,\n  Metadata,\n  MetadataBuilder,\n  draco_GeometryAttribute_Type\n} from '../draco3d/draco3d-types';\n\nimport type {TypedArray} from '@loaders.gl/schema';\nimport type {DracoMesh} from './draco-types';\n\nexport type DracoBuildOptions = {\n  pointcloud?: boolean;\n  metadata?: {[key: string]: string};\n  attributesMetadata?: {};\n  log?: any;\n\n  // draco encoding options\n  speed?: [number, number];\n  method?: string;\n  quantization?: {[attributeName: string]: number};\n};\n\n// Native Draco attribute names to GLTF attribute names.\nconst GLTF_TO_DRACO_ATTRIBUTE_NAME_MAP = {\n  POSITION: 'POSITION',\n  NORMAL: 'NORMAL',\n  COLOR_0: 'COLOR',\n  TEXCOORD_0: 'TEX_COORD'\n};\n\nconst noop = () => {};\n\nexport default class DracoBuilder {\n  draco: Draco3D;\n  dracoEncoder: Encoder;\n  dracoMeshBuilder: MeshBuilder;\n  dracoMetadataBuilder: MetadataBuilder;\n  log: any;\n\n  // draco - the draco decoder, either import `draco3d` or load dynamically\n  constructor(draco: Draco3D) {\n    this.draco = draco;\n    this.dracoEncoder = new this.draco.Encoder();\n    this.dracoMeshBuilder = new this.draco.MeshBuilder();\n    this.dracoMetadataBuilder = new this.draco.MetadataBuilder();\n  }\n\n  destroy(): void {\n    this.destroyEncodedObject(this.dracoMeshBuilder);\n    this.destroyEncodedObject(this.dracoEncoder);\n    this.destroyEncodedObject(this.dracoMetadataBuilder);\n    // @ts-ignore\n    this.dracoMeshBuilder = null;\n    // @ts-ignore\n    this.dracoEncoder = null;\n    // @ts-ignore\n    this.draco = null;\n  }\n\n  // TBD - when does this need to be called?\n  destroyEncodedObject(object): void {\n    if (object) {\n      this.draco.destroy(object);\n    }\n  }\n\n  /**\n   * Encode mesh or point cloud\n   * @param mesh =({})\n   * @param options\n   */\n  encodeSync(mesh: DracoMesh, options: DracoBuildOptions = {}): ArrayBuffer {\n    this.log = noop; // TODO\n    this._setOptions(options);\n\n    return options.pointcloud\n      ? this._encodePointCloud(mesh, options)\n      : this._encodeMesh(mesh, options);\n  }\n\n  // PRIVATE\n\n  _getAttributesFromMesh(mesh: DracoMesh) {\n    // TODO - Change the encodePointCloud interface instead?\n    const attributes = {...mesh, ...mesh.attributes};\n    // Fold indices into the attributes\n    if (mesh.indices) {\n      attributes.indices = mesh.indices;\n    }\n    return attributes;\n  }\n\n  _encodePointCloud(pointcloud: DracoMesh, options: DracoBuildOptions): ArrayBuffer {\n    const dracoPointCloud = new this.draco.PointCloud();\n\n    if (options.metadata) {\n      this._addGeometryMetadata(dracoPointCloud, options.metadata);\n    }\n\n    const attributes = this._getAttributesFromMesh(pointcloud);\n\n    // Build a `DracoPointCloud` from the input data\n    this._createDracoPointCloud(dracoPointCloud, attributes, options);\n\n    const dracoData = new this.draco.DracoInt8Array();\n\n    try {\n      const encodedLen = this.dracoEncoder.EncodePointCloudToDracoBuffer(\n        dracoPointCloud,\n        false,\n        dracoData\n      );\n\n      if (!(encodedLen > 0)) {\n        throw new Error('Draco encoding failed.');\n      }\n\n      this.log(`DRACO encoded ${dracoPointCloud.num_points()} points\n        with ${dracoPointCloud.num_attributes()} attributes into ${encodedLen} bytes`);\n\n      return dracoInt8ArrayToArrayBuffer(dracoData);\n    } finally {\n      this.destroyEncodedObject(dracoData);\n      this.destroyEncodedObject(dracoPointCloud);\n    }\n  }\n\n  _encodeMesh(mesh: DracoMesh, options: DracoBuildOptions): ArrayBuffer {\n    const dracoMesh = new this.draco.Mesh();\n\n    if (options.metadata) {\n      this._addGeometryMetadata(dracoMesh, options.metadata);\n    }\n\n    const attributes = this._getAttributesFromMesh(mesh);\n\n    // Build a `DracoMesh` from the input data\n    this._createDracoMesh(dracoMesh, attributes, options);\n\n    const dracoData = new this.draco.DracoInt8Array();\n\n    try {\n      const encodedLen = this.dracoEncoder.EncodeMeshToDracoBuffer(dracoMesh, dracoData);\n      if (encodedLen <= 0) {\n        throw new Error('Draco encoding failed.');\n      }\n\n      this.log(`DRACO encoded ${dracoMesh.num_points()} points\n        with ${dracoMesh.num_attributes()} attributes into ${encodedLen} bytes`);\n\n      return dracoInt8ArrayToArrayBuffer(dracoData);\n    } finally {\n      this.destroyEncodedObject(dracoData);\n      this.destroyEncodedObject(dracoMesh);\n    }\n  }\n\n  /**\n   * Set encoding options.\n   * @param {{speed?: any; method?: any; quantization?: any;}} options\n   */\n  _setOptions(options: DracoBuildOptions): void {\n    if ('speed' in options) {\n      // @ts-ignore\n      this.dracoEncoder.SetSpeedOptions(...options.speed);\n    }\n    if ('method' in options) {\n      const dracoMethod = this.draco[options.method || 'MESH_SEQUENTIAL_ENCODING'];\n      // assert(dracoMethod)\n      this.dracoEncoder.SetEncodingMethod(dracoMethod);\n    }\n    if ('quantization' in options) {\n      for (const attribute in options.quantization) {\n        const bits = options.quantization[attribute];\n        const dracoPosition = this.draco[attribute];\n        this.dracoEncoder.SetAttributeQuantization(dracoPosition, bits);\n      }\n    }\n  }\n\n  /**\n   * @param {Mesh} dracoMesh\n   * @param {object} attributes\n   * @returns {Mesh}\n   */\n  _createDracoMesh(dracoMesh: Mesh, attributes, options: DracoBuildOptions): Mesh {\n    const optionalMetadata = options.attributesMetadata || {};\n\n    try {\n      const positions = this._getPositionAttribute(attributes);\n      if (!positions) {\n        throw new Error('positions');\n      }\n      const vertexCount = positions.length / 3;\n\n      for (let attributeName in attributes) {\n        const attribute = attributes[attributeName];\n        attributeName = GLTF_TO_DRACO_ATTRIBUTE_NAME_MAP[attributeName] || attributeName;\n        const uniqueId = this._addAttributeToMesh(dracoMesh, attributeName, attribute, vertexCount);\n\n        if (uniqueId !== -1) {\n          this._addAttributeMetadata(dracoMesh, uniqueId, {\n            name: attributeName,\n            ...(optionalMetadata[attributeName] || {})\n          });\n        }\n      }\n    } catch (error) {\n      this.destroyEncodedObject(dracoMesh);\n      throw error;\n    }\n\n    return dracoMesh;\n  }\n\n  /**\n   * @param {} dracoPointCloud\n   * @param {object} attributes\n   */\n  _createDracoPointCloud(\n    dracoPointCloud: PointCloud,\n    attributes: object,\n    options: DracoBuildOptions\n  ): PointCloud {\n    const optionalMetadata = options.attributesMetadata || {};\n\n    try {\n      const positions = this._getPositionAttribute(attributes);\n      if (!positions) {\n        throw new Error('positions');\n      }\n      const vertexCount = positions.length / 3;\n\n      for (let attributeName in attributes) {\n        const attribute = attributes[attributeName];\n        attributeName = GLTF_TO_DRACO_ATTRIBUTE_NAME_MAP[attributeName] || attributeName;\n        const uniqueId = this._addAttributeToMesh(\n          dracoPointCloud,\n          attributeName,\n          attribute,\n          vertexCount\n        );\n        if (uniqueId !== -1) {\n          this._addAttributeMetadata(dracoPointCloud, uniqueId, {\n            name: attributeName,\n            ...(optionalMetadata[attributeName] || {})\n          });\n        }\n      }\n    } catch (error) {\n      this.destroyEncodedObject(dracoPointCloud);\n      throw error;\n    }\n\n    return dracoPointCloud;\n  }\n\n  /**\n   * @param mesh\n   * @param attributeName\n   * @param attribute\n   * @param vertexCount\n   */\n  _addAttributeToMesh(\n    mesh: PointCloud,\n    attributeName: string,\n    attribute: TypedArray,\n    vertexCount: number\n  ): number {\n    if (!ArrayBuffer.isView(attribute)) {\n      return -1;\n    }\n\n    const type = this._getDracoAttributeType(attributeName);\n    // @ts-ignore TODO/fix types\n    const size = attribute.length / vertexCount;\n\n    if (type === 'indices') {\n      // @ts-ignore TODO/fix types\n      const numFaces = attribute.length / 3;\n      this.log(`Adding attribute ${attributeName}, size ${numFaces}`);\n\n      // @ts-ignore assumes mesh is a Mesh, not a point cloud\n      this.dracoMeshBuilder.AddFacesToMesh(mesh, numFaces, attribute);\n      return -1;\n    }\n\n    this.log(`Adding attribute ${attributeName}, size ${size}`);\n\n    const builder = this.dracoMeshBuilder;\n    const {buffer} = attribute;\n\n    switch (attribute.constructor) {\n      case Int8Array:\n        return builder.AddInt8Attribute(mesh, type, vertexCount, size, new Int8Array(buffer));\n\n      case Int16Array:\n        return builder.AddInt16Attribute(mesh, type, vertexCount, size, new Int16Array(buffer));\n\n      case Int32Array:\n        return builder.AddInt32Attribute(mesh, type, vertexCount, size, new Int32Array(buffer));\n      case Uint8Array:\n      case Uint8ClampedArray:\n        return builder.AddUInt8Attribute(mesh, type, vertexCount, size, new Uint8Array(buffer));\n\n      case Uint16Array:\n        return builder.AddUInt16Attribute(mesh, type, vertexCount, size, new Uint16Array(buffer));\n\n      case Uint32Array:\n        return builder.AddUInt32Attribute(mesh, type, vertexCount, size, new Uint32Array(buffer));\n\n      case Float32Array:\n        return builder.AddFloatAttribute(mesh, type, vertexCount, size, new Float32Array(buffer));\n\n      default:\n        // eslint-disable-next-line no-console\n        console.warn('Unsupported attribute type', attribute);\n        return -1;\n    }\n\n    // case Float64Array:\n    // Add attribute does not seem to be exposed\n    //   return builder.AddAttribute(mesh, type, vertexCount, size, new Float32Array(buffer));\n  }\n\n  /**\n   * DRACO can compress attributes of know type better\n   * TODO - expose an attribute type map?\n   * @param attributeName\n   */\n  _getDracoAttributeType(attributeName: string): draco_GeometryAttribute_Type | 'indices' {\n    switch (attributeName.toLowerCase()) {\n      case 'indices':\n        return 'indices';\n      case 'position':\n      case 'positions':\n      case 'vertices':\n        return this.draco.POSITION;\n      case 'normal':\n      case 'normals':\n        return this.draco.NORMAL;\n      case 'color':\n      case 'colors':\n        return this.draco.COLOR;\n      case 'texcoord':\n      case 'texcoords':\n        return this.draco.TEX_COORD;\n      default:\n        return this.draco.GENERIC;\n    }\n  }\n\n  _getPositionAttribute(attributes) {\n    for (const attributeName in attributes) {\n      const attribute = attributes[attributeName];\n      const dracoType = this._getDracoAttributeType(attributeName);\n      if (dracoType === this.draco.POSITION) {\n        return attribute;\n      }\n    }\n    return null;\n  }\n\n  /**\n   * Add metadata for the geometry.\n   * @param dracoGeometry - WASM Draco Object\n   * @param metadata\n   */\n  _addGeometryMetadata(dracoGeometry: PointCloud, metadata: {[key: string]: string}) {\n    const dracoMetadata = new this.draco.Metadata();\n    this._populateDracoMetadata(dracoMetadata, metadata);\n    this.dracoMeshBuilder.AddMetadata(dracoGeometry, dracoMetadata);\n  }\n\n  /**\n   * Add metadata for an attribute to geometry.\n   * @param dracoGeometry - WASM Draco Object\n   * @param uniqueAttributeId\n   * @param metadata\n   */\n  _addAttributeMetadata(\n    dracoGeometry: PointCloud,\n    uniqueAttributeId: number,\n    metadata: Map<string, string> | {[key: string]: string}\n  ) {\n    // Note: Draco JS IDL doesn't seem to expose draco.AttributeMetadata, however it seems to\n    // create such objects automatically from draco.Metadata object.\n    const dracoAttributeMetadata = new this.draco.Metadata();\n    this._populateDracoMetadata(dracoAttributeMetadata, metadata);\n    // Draco3d doc note: Directly add attribute metadata to geometry.\n    // You can do this without explicitly adding |GeometryMetadata| to mesh.\n    this.dracoMeshBuilder.SetMetadataForAttribute(\n      dracoGeometry,\n      uniqueAttributeId,\n      dracoAttributeMetadata\n    );\n  }\n\n  /**\n   * Add contents of object or map to a WASM Draco Metadata Object\n   * @param dracoMetadata - WASM Draco Object\n   * @param metadata\n   */\n  _populateDracoMetadata(\n    dracoMetadata: Metadata,\n    metadata: Map<string, string> | {[key: string]: string}\n  ) {\n    for (const [key, value] of getEntries(metadata)) {\n      switch (typeof value) {\n        case 'number':\n          if (Math.trunc(value) === value) {\n            this.dracoMetadataBuilder.AddIntEntry(dracoMetadata, key, value);\n          } else {\n            this.dracoMetadataBuilder.AddDoubleEntry(dracoMetadata, key, value);\n          }\n          break;\n        case 'object':\n          if (value instanceof Int32Array) {\n            this.dracoMetadataBuilder.AddIntEntryArray(dracoMetadata, key, value, value.length);\n          }\n          break;\n        case 'string':\n        default:\n          this.dracoMetadataBuilder.AddStringEntry(dracoMetadata, key, value);\n      }\n    }\n  }\n}\n\n// HELPER FUNCTIONS\n\n/**\n * Copy encoded data to buffer\n * @param dracoData\n */\nfunction dracoInt8ArrayToArrayBuffer(dracoData: DracoInt8Array) {\n  const byteLength = dracoData.size();\n  const outputBuffer = new ArrayBuffer(byteLength);\n  const outputData = new Int8Array(outputBuffer);\n  for (let i = 0; i < byteLength; ++i) {\n    outputData[i] = dracoData.GetValue(i);\n  }\n  return outputBuffer;\n}\n\n/** Enable iteration over either an object or a map */\nfunction getEntries(container) {\n  const hasEntriesFunc = container.entries && !container.hasOwnProperty('entries');\n  return hasEntriesFunc ? container.entries() : Object.entries(container);\n}\n", "// Version constant cannot be imported, it needs to correspond to the build version of **this** module.\n// __VERSION__ is injected by babel-plugin-version-inline\n// @ts-ignore TS2304: Cannot find name '__VERSION__'.\nexport const VERSION = typeof __VERSION__ !== 'undefined' ? __VERSION__ : 'latest';\n", "// loaders.gl\n// SPDX-License-Identifier: MIT\n// Copyright (c) vis.gl contributors\n\nimport type {Loader, LoaderWithParser, StrictLoaderOptions} from '@loaders.gl/loader-utils';\nimport {extractLoadLibraryOptions} from '@loaders.gl/worker-utils';\nimport type {DracoMesh} from './lib/draco-types';\nimport type {DracoParseOptions} from './lib/draco-parser';\nimport {VERSION} from './lib/utils/version';\nimport DracoParser from './lib/draco-parser';\nimport {loadDracoDecoderModule} from './lib/draco-module-loader';\n\nexport type DracoLoaderOptions = StrictLoaderOptions & {\n  draco?: DracoParseOptions & {\n    /** @deprecated WASM decoding is faster but JS is more backwards compatible */\n    decoderType?: 'wasm' | 'js';\n    /** Override the URL to the worker bundle (by default loads from unpkg.com) */\n    workerUrl?: string;\n  };\n};\n\n/**\n * Worker loader for Draco3D compressed geometries\n */\nexport const DracoWorkerLoader = {\n  dataType: null as unknown as DracoMesh,\n  batchType: null as never,\n  name: 'Draco',\n  id: 'draco',\n  module: 'draco',\n  // shapes: ['mesh'],\n  version: VERSION,\n  worker: true,\n  extensions: ['drc'],\n  mimeTypes: ['application/octet-stream'],\n  binary: true,\n  tests: ['DRACO'],\n  options: {\n    draco: {\n      decoderType: typeof WebAssembly === 'object' ? 'wasm' : 'js', // 'js' for IE11\n      extraAttributes: {},\n      attributeNameEntry: undefined\n    }\n  }\n} as const satisfies Loader<DracoMesh, never, DracoLoaderOptions>;\n\n/**\n * Loader for Draco3D compressed geometries\n */\nexport const DracoLoader = {\n  ...DracoWorkerLoader,\n  parse\n} as const satisfies LoaderWithParser<DracoMesh, never, DracoLoaderOptions>;\n\nasync function parse(arrayBuffer: ArrayBuffer, options?: DracoLoaderOptions): Promise<DracoMesh> {\n  const {draco} = await loadDracoDecoderModule(\n    extractLoadLibraryOptions(options),\n    options?.draco?.decoderType || 'wasm'\n  );\n  const dracoParser = new DracoParser(draco);\n  try {\n    return dracoParser.parseSync(arrayBuffer, options?.draco);\n  } finally {\n    dracoParser.destroy();\n  }\n}\n", "/* eslint-disable camelcase */\n\nimport type {TypedArray, MeshAttribute, MeshGeometry} from '@loaders.gl/schema';\n\n// Draco types (input)\nimport type {\n  Draco3D,\n  Decoder,\n  Mesh,\n  PointCloud,\n  PointAttribute,\n  Metadata,\n  MetadataQuerier,\n  DracoInt32Array,\n  draco_DataType\n} from '../draco3d/draco3d-types';\n\n// Parsed data types (output)\nimport type {\n  DracoMesh,\n  DracoLoaderData,\n  DracoAttribute,\n  DracoMetadataEntry,\n  DracoQuantizationTransform,\n  DracoOctahedronTransform\n} from './draco-types';\n\nimport {getMeshBoundingBox} from '@loaders.gl/schema-utils';\nimport {getDracoSchema} from './utils/get-draco-schema';\n\n/** Options to control draco parsing */\nexport type DracoParseOptions = {\n  /** How triangle indices should be generated (mesh only) */\n  topology?: 'triangle-list' | 'triangle-strip';\n  /** Specify which attribute metadata entry stores the attribute name */\n  attributeNameEntry?: string;\n  /** Names and ids of extra attributes to include in the output */\n  extraAttributes?: {[uniqueId: string]: number};\n  /** Skip transforms specific quantized attributes */\n  quantizedAttributes?: ('POSITION' | 'NORMAL' | 'COLOR' | 'TEX_COORD' | 'GENERIC')[];\n  /** Skip transforms specific octahedron encoded  attributes */\n  octahedronAttributes?: ('POSITION' | 'NORMAL' | 'COLOR' | 'TEX_COORD' | 'GENERIC')[];\n};\n\n// @ts-ignore\n// eslint-disable-next-line @typescript-eslint/no-unused-vars\nconst GEOMETRY_TYPE = {\n  TRIANGULAR_MESH: 0,\n  POINT_CLOUD: 1\n};\n\n// Native Draco attribute names to GLTF attribute names.\nconst DRACO_TO_GLTF_ATTRIBUTE_NAME_MAP = {\n  POSITION: 'POSITION',\n  NORMAL: 'NORMAL',\n  COLOR: 'COLOR_0',\n  TEX_COORD: 'TEXCOORD_0'\n};\n\nconst DRACO_DATA_TYPE_TO_TYPED_ARRAY_MAP = {\n  1: Int8Array,\n  2: Uint8Array,\n  3: Int16Array,\n  4: Uint16Array,\n  5: Int32Array,\n  6: Uint32Array,\n  // 7: BigInt64Array,\n  // 8: BigUint64Array,\n  9: Float32Array\n  // 10: Float64Array\n  // 11: BOOL - What array type do we use for this?\n};\n\nconst INDEX_ITEM_SIZE = 4;\n\nexport default class DracoParser {\n  draco: Draco3D;\n  decoder: Decoder;\n  metadataQuerier: MetadataQuerier;\n\n  // draco - the draco decoder, either import `draco3d` or load dynamically\n  constructor(draco: Draco3D) {\n    this.draco = draco;\n    this.decoder = new this.draco.Decoder();\n    this.metadataQuerier = new this.draco.MetadataQuerier();\n  }\n\n  /**\n   * Destroy draco resources\n   */\n  destroy(): void {\n    this.draco.destroy(this.decoder);\n    this.draco.destroy(this.metadataQuerier);\n  }\n\n  /**\n   * NOTE: caller must call `destroyGeometry` on the return value after using it\n   * @param arrayBuffer\n   * @param options\n   */\n  parseSync(arrayBuffer: ArrayBuffer, options: DracoParseOptions = {}): DracoMesh {\n    const buffer = new this.draco.DecoderBuffer();\n    buffer.Init(new Int8Array(arrayBuffer), arrayBuffer.byteLength);\n\n    this._disableAttributeTransforms(options);\n\n    const geometry_type = this.decoder.GetEncodedGeometryType(buffer);\n    const dracoGeometry =\n      geometry_type === this.draco.TRIANGULAR_MESH\n        ? new this.draco.Mesh()\n        : new this.draco.PointCloud();\n\n    try {\n      let dracoStatus;\n      switch (geometry_type) {\n        case this.draco.TRIANGULAR_MESH:\n          dracoStatus = this.decoder.DecodeBufferToMesh(buffer, dracoGeometry as Mesh);\n          break;\n\n        case this.draco.POINT_CLOUD:\n          dracoStatus = this.decoder.DecodeBufferToPointCloud(buffer, dracoGeometry);\n          break;\n\n        default:\n          throw new Error('DRACO: Unknown geometry type.');\n      }\n\n      if (!dracoStatus.ok() || !dracoGeometry.ptr) {\n        const message = `DRACO decompression failed: ${dracoStatus.error_msg()}`;\n        // console.error(message);\n        throw new Error(message);\n      }\n\n      const loaderData = this._getDracoLoaderData(dracoGeometry, geometry_type, options);\n\n      const geometry = this._getMeshData(dracoGeometry, loaderData, options);\n\n      const boundingBox = getMeshBoundingBox(geometry.attributes);\n\n      const schema = getDracoSchema(geometry.attributes, loaderData, geometry.indices);\n\n      const data: DracoMesh = {\n        loader: 'draco',\n        loaderData,\n        header: {\n          vertexCount: dracoGeometry.num_points(),\n          boundingBox\n        },\n        ...geometry,\n        schema\n      };\n      return data;\n    } finally {\n      this.draco.destroy(buffer);\n      if (dracoGeometry) {\n        this.draco.destroy(dracoGeometry);\n      }\n    }\n  }\n\n  // Draco specific \"loader data\"\n\n  /**\n   * Extract\n   * @param dracoGeometry\n   * @param geometry_type\n   * @param options\n   * @returns\n   */\n  _getDracoLoaderData(\n    dracoGeometry: Mesh | PointCloud,\n    geometry_type,\n    options: DracoParseOptions\n  ): DracoLoaderData {\n    const metadata = this._getTopLevelMetadata(dracoGeometry);\n    const attributes = this._getDracoAttributes(dracoGeometry, options);\n\n    return {\n      geometry_type,\n      num_attributes: dracoGeometry.num_attributes(),\n      num_points: dracoGeometry.num_points(),\n      num_faces: dracoGeometry instanceof this.draco.Mesh ? dracoGeometry.num_faces() : 0,\n      metadata,\n      attributes\n    };\n  }\n\n  /**\n   * Extract all draco provided information and metadata for each attribute\n   * @param dracoGeometry\n   * @param options\n   * @returns\n   */\n  _getDracoAttributes(\n    dracoGeometry: Mesh | PointCloud,\n    options: DracoParseOptions\n  ): {[unique_id: number]: DracoAttribute} {\n    const dracoAttributes: {[unique_id: number]: DracoAttribute} = {};\n\n    for (let attributeId = 0; attributeId < dracoGeometry.num_attributes(); attributeId++) {\n      // Note: Draco docs do not seem clear on `GetAttribute` ids just being a zero-based index,\n      // but it does seems to work this way\n      const dracoAttribute = this.decoder.GetAttribute(dracoGeometry, attributeId);\n\n      const metadata = this._getAttributeMetadata(dracoGeometry, attributeId);\n\n      dracoAttributes[dracoAttribute.unique_id()] = {\n        unique_id: dracoAttribute.unique_id(),\n        attribute_type: dracoAttribute.attribute_type(),\n        data_type: dracoAttribute.data_type(),\n        num_components: dracoAttribute.num_components(),\n\n        byte_offset: dracoAttribute.byte_offset(),\n        byte_stride: dracoAttribute.byte_stride(),\n        normalized: dracoAttribute.normalized(),\n        attribute_index: attributeId,\n\n        metadata\n      };\n\n      // Add transformation parameters for any attributes app wants untransformed\n      const quantization = this._getQuantizationTransform(dracoAttribute, options);\n      if (quantization) {\n        dracoAttributes[dracoAttribute.unique_id()].quantization_transform = quantization;\n      }\n\n      const octahedron = this._getOctahedronTransform(dracoAttribute, options);\n      if (octahedron) {\n        dracoAttributes[dracoAttribute.unique_id()].octahedron_transform = octahedron;\n      }\n    }\n\n    return dracoAttributes;\n  }\n\n  /**\n   * Get standard loaders.gl mesh category data\n   * Extracts the geometry from draco\n   * @param dracoGeometry\n   * @param options\n   */\n  _getMeshData(\n    dracoGeometry: Mesh | PointCloud,\n    loaderData: DracoLoaderData,\n    options: DracoParseOptions\n  ): MeshGeometry {\n    const attributes = this._getMeshAttributes(loaderData, dracoGeometry, options);\n\n    const positionAttribute = attributes.POSITION;\n    if (!positionAttribute) {\n      throw new Error('DRACO: No position attribute found.');\n    }\n\n    // For meshes, we need indices to define the faces.\n    if (dracoGeometry instanceof this.draco.Mesh) {\n      switch (options.topology) {\n        case 'triangle-strip':\n          return {\n            topology: 'triangle-strip',\n            // TODO - mode is wrong?\n            mode: 4, // GL.TRIANGLES\n            attributes,\n            indices: {\n              value: this._getTriangleStripIndices(dracoGeometry),\n              size: 1\n            }\n          };\n        case 'triangle-list':\n        default:\n          return {\n            topology: 'triangle-list',\n            // TODO - mode is wrong?\n            mode: 5, // GL.TRIANGLE_STRIP\n            attributes,\n            indices: {\n              value: this._getTriangleListIndices(dracoGeometry),\n              size: 1\n            }\n          };\n      }\n    }\n\n    // PointCloud - must come last as Mesh inherits from PointCloud\n    return {\n      topology: 'point-list',\n      mode: 0, // GL.POINTS\n      attributes\n    };\n  }\n\n  _getMeshAttributes(\n    loaderData: DracoLoaderData,\n    dracoGeometry: Mesh | PointCloud,\n    options: DracoParseOptions\n  ): {[attributeName: string]: MeshAttribute} {\n    const attributes: {[key: string]: MeshAttribute} = {};\n\n    for (const loaderAttribute of Object.values(loaderData.attributes)) {\n      const attributeName = this._deduceAttributeName(loaderAttribute, options);\n      loaderAttribute.name = attributeName;\n      const values = this._getAttributeValues(dracoGeometry, loaderAttribute);\n      if (values) {\n        const {value, size} = values;\n        attributes[attributeName] = {\n          value,\n          size,\n          byteOffset: loaderAttribute.byte_offset,\n          byteStride: loaderAttribute.byte_stride,\n          normalized: loaderAttribute.normalized\n        };\n      }\n    }\n\n    return attributes;\n  }\n\n  // MESH INDICES EXTRACTION\n\n  /**\n   * For meshes, we need indices to define the faces.\n   * @param dracoGeometry\n   */\n  _getTriangleListIndices(dracoGeometry: Mesh) {\n    // Example on how to retrieve mesh and attributes.\n    const numFaces = dracoGeometry.num_faces();\n    const numIndices = numFaces * 3;\n    const byteLength = numIndices * INDEX_ITEM_SIZE;\n\n    const ptr = this.draco._malloc(byteLength);\n    try {\n      this.decoder.GetTrianglesUInt32Array(dracoGeometry, byteLength, ptr);\n      return new Uint32Array(this.draco.HEAPF32.buffer, ptr, numIndices).slice();\n    } finally {\n      this.draco._free(ptr);\n    }\n  }\n\n  /**\n   * For meshes, we need indices to define the faces.\n   * @param dracoGeometry\n   */\n  _getTriangleStripIndices(dracoGeometry: Mesh) {\n    const dracoArray = new this.draco.DracoInt32Array();\n    try {\n      /* const numStrips = */ this.decoder.GetTriangleStripsFromMesh(dracoGeometry, dracoArray);\n      return getUint32Array(dracoArray);\n    } finally {\n      this.draco.destroy(dracoArray);\n    }\n  }\n\n  /**\n   *\n   * @param dracoGeometry\n   * @param dracoAttribute\n   * @param attributeName\n   */\n  _getAttributeValues(\n    dracoGeometry: Mesh | PointCloud,\n    attribute: DracoAttribute\n  ): {value: TypedArray; size: number} | null {\n    const TypedArrayCtor = DRACO_DATA_TYPE_TO_TYPED_ARRAY_MAP[attribute.data_type];\n    if (!TypedArrayCtor) {\n      // eslint-disable-next-line no-console\n      console.warn(`DRACO: Unsupported attribute type ${attribute.data_type}`);\n      return null;\n    }\n    const numComponents = attribute.num_components;\n    const numPoints = dracoGeometry.num_points();\n    const numValues = numPoints * numComponents;\n\n    const byteLength = numValues * TypedArrayCtor.BYTES_PER_ELEMENT;\n    const dataType = getDracoDataType(this.draco, TypedArrayCtor);\n\n    let value: TypedArray;\n\n    const ptr = this.draco._malloc(byteLength);\n    try {\n      const dracoAttribute = this.decoder.GetAttribute(dracoGeometry, attribute.attribute_index);\n      this.decoder.GetAttributeDataArrayForAllPoints(\n        dracoGeometry,\n        dracoAttribute,\n        dataType,\n        byteLength,\n        ptr\n      );\n      value = new TypedArrayCtor(this.draco.HEAPF32.buffer, ptr, numValues).slice();\n    } finally {\n      this.draco._free(ptr);\n    }\n\n    return {value, size: numComponents};\n  }\n\n  // Attribute names\n\n  /** \n   * DRACO does not store attribute names - We need to deduce an attribute name\n   * for each attribute\n  _getAttributeNames(\n    dracoGeometry: Mesh | PointCloud,\n    options: DracoParseOptions\n  ): {[unique_id: number]: string} {\n    const attributeNames: {[unique_id: number]: string} = {};\n    for (let attributeId = 0; attributeId < dracoGeometry.num_attributes(); attributeId++) {\n      const dracoAttribute = this.decoder.GetAttribute(dracoGeometry, attributeId);\n      const attributeName = this._deduceAttributeName(dracoAttribute, options);\n      attributeNames[attributeName] = attributeName;\n    }\n    return attributeNames;\n  }\n   */\n\n  /**\n   * Deduce an attribute name.\n   * @note DRACO does not save attribute names, just general type (POSITION, COLOR)\n   * to help optimize compression. We generate GLTF compatible names for the Draco-recognized\n   * types\n   * @param attributeData\n   */\n  _deduceAttributeName(attribute: DracoAttribute, options: DracoParseOptions): string {\n    // Deduce name based on application provided map\n    const uniqueId = attribute.unique_id;\n    for (const [attributeName, attributeUniqueId] of Object.entries(\n      options.extraAttributes || {}\n    )) {\n      if (attributeUniqueId === uniqueId) {\n        return attributeName;\n      }\n    }\n\n    // Deduce name based on attribute type\n    const thisAttributeType = attribute.attribute_type;\n    for (const dracoAttributeConstant in DRACO_TO_GLTF_ATTRIBUTE_NAME_MAP) {\n      const attributeType = this.draco[dracoAttributeConstant];\n      if (attributeType === thisAttributeType) {\n        // TODO - Return unique names if there multiple attributes per type\n        // (e.g. multiple TEX_COORDS or COLORS)\n        return DRACO_TO_GLTF_ATTRIBUTE_NAME_MAP[dracoAttributeConstant];\n      }\n    }\n\n    // Look up in metadata\n    // TODO - shouldn't this have priority?\n    const entryName = options.attributeNameEntry || 'name';\n    if (attribute.metadata[entryName]) {\n      return attribute.metadata[entryName].string;\n    }\n\n    // Attribute of \"GENERIC\" type, we need to assign some name\n    return `CUSTOM_ATTRIBUTE_${uniqueId}`;\n  }\n\n  // METADATA EXTRACTION\n\n  /** Get top level metadata */\n  _getTopLevelMetadata(dracoGeometry: Mesh | PointCloud) {\n    const dracoMetadata = this.decoder.GetMetadata(dracoGeometry);\n    return this._getDracoMetadata(dracoMetadata);\n  }\n\n  /** Get per attribute metadata */\n  _getAttributeMetadata(dracoGeometry: Mesh | PointCloud, attributeId: number) {\n    const dracoMetadata = this.decoder.GetAttributeMetadata(dracoGeometry, attributeId);\n    return this._getDracoMetadata(dracoMetadata);\n  }\n\n  /**\n   * Extract metadata field values\n   * @param dracoMetadata\n   * @returns\n   */\n  _getDracoMetadata(dracoMetadata: Metadata): {[entry: string]: DracoMetadataEntry} {\n    // The not so wonderful world of undocumented Draco APIs :(\n    if (!dracoMetadata || !dracoMetadata.ptr) {\n      return {};\n    }\n    const result = {};\n    const numEntries = this.metadataQuerier.NumEntries(dracoMetadata);\n    for (let entryIndex = 0; entryIndex < numEntries; entryIndex++) {\n      const entryName = this.metadataQuerier.GetEntryName(dracoMetadata, entryIndex);\n      result[entryName] = this._getDracoMetadataField(dracoMetadata, entryName);\n    }\n    return result;\n  }\n\n  /**\n   * Extracts possible values for one metadata entry by name\n   * @param dracoMetadata\n   * @param entryName\n   */\n  _getDracoMetadataField(dracoMetadata: Metadata, entryName: string): DracoMetadataEntry {\n    const dracoArray = new this.draco.DracoInt32Array();\n    try {\n      // Draco metadata fields can hold int32 arrays\n      this.metadataQuerier.GetIntEntryArray(dracoMetadata, entryName, dracoArray);\n      const intArray = getInt32Array(dracoArray);\n      return {\n        int: this.metadataQuerier.GetIntEntry(dracoMetadata, entryName),\n        string: this.metadataQuerier.GetStringEntry(dracoMetadata, entryName),\n        double: this.metadataQuerier.GetDoubleEntry(dracoMetadata, entryName),\n        intArray\n      };\n    } finally {\n      this.draco.destroy(dracoArray);\n    }\n  }\n\n  // QUANTIZED ATTRIBUTE SUPPORT (NO DECOMPRESSION)\n\n  /** Skip transforms for specific attribute types */\n  _disableAttributeTransforms(options: DracoParseOptions) {\n    const {quantizedAttributes = [], octahedronAttributes = []} = options;\n    const skipAttributes = [...quantizedAttributes, ...octahedronAttributes];\n    for (const dracoAttributeName of skipAttributes) {\n      this.decoder.SkipAttributeTransform(this.draco[dracoAttributeName]);\n    }\n  }\n\n  /**\n   * Extract (and apply?) Position Transform\n   * @todo not used\n   */\n  _getQuantizationTransform(\n    dracoAttribute: PointAttribute,\n    options: DracoParseOptions\n  ): DracoQuantizationTransform | null {\n    const {quantizedAttributes = []} = options;\n    const attribute_type = dracoAttribute.attribute_type();\n    const skip = quantizedAttributes.map((type) => this.decoder[type]).includes(attribute_type);\n    if (skip) {\n      const transform = new this.draco.AttributeQuantizationTransform();\n      try {\n        if (transform.InitFromAttribute(dracoAttribute)) {\n          return {\n            quantization_bits: transform.quantization_bits(),\n            range: transform.range(),\n            min_values: new Float32Array([1, 2, 3]).map((i) => transform.min_value(i))\n          };\n        }\n      } finally {\n        this.draco.destroy(transform);\n      }\n    }\n    return null;\n  }\n\n  _getOctahedronTransform(\n    dracoAttribute: PointAttribute,\n    options: DracoParseOptions\n  ): DracoOctahedronTransform | null {\n    const {octahedronAttributes = []} = options;\n    const attribute_type = dracoAttribute.attribute_type();\n    const octahedron = octahedronAttributes\n      .map((type) => this.decoder[type])\n      .includes(attribute_type);\n    if (octahedron) {\n      const transform = new this.draco.AttributeQuantizationTransform();\n      try {\n        if (transform.InitFromAttribute(dracoAttribute)) {\n          return {\n            quantization_bits: transform.quantization_bits()\n          };\n        }\n      } finally {\n        this.draco.destroy(transform);\n      }\n    }\n    return null;\n  }\n\n  // HELPERS\n}\n\n/**\n * Get draco specific data type by TypedArray constructor type\n * @param attributeType\n * @returns draco specific data type\n */\nfunction getDracoDataType(draco: Draco3D, attributeType: any): draco_DataType {\n  switch (attributeType) {\n    case Float32Array:\n      return draco.DT_FLOAT32;\n    case Int8Array:\n      return draco.DT_INT8;\n    case Int16Array:\n      return draco.DT_INT16;\n    case Int32Array:\n      return draco.DT_INT32;\n    case Uint8Array:\n      return draco.DT_UINT8;\n    case Uint16Array:\n      return draco.DT_UINT16;\n    case Uint32Array:\n      return draco.DT_UINT32;\n    default:\n      return draco.DT_INVALID;\n  }\n}\n\n/**\n * Copy a Draco int32 array into a JS typed array\n */\nfunction getInt32Array(dracoArray: DracoInt32Array): Int32Array {\n  const numValues = dracoArray.size();\n  const intArray = new Int32Array(numValues);\n  for (let i = 0; i < numValues; i++) {\n    intArray[i] = dracoArray.GetValue(i);\n  }\n  return intArray;\n}\n\n/**\n * Copy a Draco int32 array into a JS typed array\n */\nfunction getUint32Array(dracoArray: DracoInt32Array): Int32Array {\n  const numValues = dracoArray.size();\n  const intArray = new Int32Array(numValues);\n  for (let i = 0; i < numValues; i++) {\n    intArray[i] = dracoArray.GetValue(i);\n  }\n  return intArray;\n}\n", "import {MeshAttribute, Schema, Field} from '@loaders.gl/schema';\nimport {deduceMeshField} from '@loaders.gl/schema-utils';\nimport type {DracoAttribute, DracoLoaderData, DracoMetadataEntry} from '../draco-types';\n\n/** Extract an arrow-like schema from a Draco mesh */\nexport function getDracoSchema(\n  attributes: {[attributeName: string]: MeshAttribute},\n  loaderData: DracoLoaderData,\n  indices?: MeshAttribute\n): Schema {\n  const metadata = makeMetadata(loaderData.metadata);\n  const fields: Field[] = [];\n  const namedLoaderDataAttributes = transformAttributesLoaderData(loaderData.attributes);\n  for (const attributeName in attributes) {\n    const attribute = attributes[attributeName];\n    const field = getArrowFieldFromAttribute(\n      attributeName,\n      attribute,\n      namedLoaderDataAttributes[attributeName]\n    );\n    fields.push(field);\n  }\n  if (indices) {\n    const indicesField = getArrowFieldFromAttribute('indices', indices);\n    fields.push(indicesField);\n  }\n  return {fields, metadata};\n}\n\nfunction transformAttributesLoaderData(loaderData: {[key: number]: DracoAttribute}): {\n  [attributeName: string]: DracoAttribute;\n} {\n  const result: {[attributeName: string]: DracoAttribute} = {};\n  for (const key in loaderData) {\n    const dracoAttribute = loaderData[key];\n    result[dracoAttribute.name || 'undefined'] = dracoAttribute;\n  }\n  return result;\n}\n\nfunction getArrowFieldFromAttribute(\n  attributeName: string,\n  attribute: MeshAttribute,\n  loaderData?: DracoAttribute\n): Field {\n  const metadataMap = loaderData ? makeMetadata(loaderData.metadata) : undefined;\n  const field = deduceMeshField(attributeName, attribute, metadataMap);\n  return field;\n}\n\nfunction makeMetadata(metadata: {[key: string]: DracoMetadataEntry}): Record<string, string> {\n  Object.entries(metadata);\n  const serializedMetadata: Record<string, string> = {};\n  for (const key in metadata) {\n    serializedMetadata[`${key}.string`] = JSON.stringify(metadata[key]);\n  }\n  return serializedMetadata;\n}\n", "// loaders.gl\n// SPDX-License-Identifier: MIT\n// Copyright (c) vis.gl contributors\n\nimport type {ArrowTable} from '@loaders.gl/schema';\nimport type {LoaderWithParser} from '@loaders.gl/loader-utils';\nimport type {DracoLoaderOptions} from './draco-loader';\nimport {DracoLoader} from './draco-loader';\nimport {convertMeshToTable} from '@loaders.gl/schema-utils';\n\n/**\n * Loader for Draco3D compressed geometries\n */\nexport const DracoArrowLoader = {\n  ...DracoLoader,\n  dataType: null as unknown as ArrowTable,\n  worker: false,\n  parse\n} as const satisfies LoaderWithParser<ArrowTable, never, DracoLoaderOptions>;\n\nasync function parse(arrayBuffer: ArrayBuffer, options?: DracoLoaderOptions): Promise<ArrowTable> {\n  const mesh = await DracoLoader.parse(arrayBuffer, options);\n  const arrowTable = convertMeshToTable(mesh, 'arrow-table');\n  return arrowTable;\n}\n"],
  "mappings": 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  "names": ["import_worker_utils", "import_worker_utils", "import_schema_utils", "import_schema_utils", "parse"]
}