@loaders.gl/i3s/dist/index.cjs.map

i3s .

{
  "version": 3,
  "sources": ["../src/index.ts", "../src/lib/parsers/constants.ts", "../src/i3s-loader.ts", "../src/lib/parsers/parse-i3s-tile-content.ts", "../src/types.ts", "../src/lib/utils/url-utils.ts", "../src/i3s-content-loader.ts", "../src/lib/parsers/parse-i3s.ts", "../src/lib/helpers/i3s-nodepages-tiles.ts", "../src/i3s-node-page-loader.ts", "../src/i3s-slpk-loader.ts", "../src/lib/parsers/parse-slpk/parse-slpk.ts", "../src/lib/parsers/parse-slpk/slpk-archieve.ts", "../src/i3s-attribute-loader.ts", "../src/lib/parsers/parse-i3s-attribute.ts", "../src/lib/parsers/parse-i3s-building-scene-layer.ts", "../src/i3s-building-scene-layer-loader.ts", "../src/lib/parsers/parse-arcgis-webscene.ts", "../src/arcgis-webscene-loader.ts", "../src/lib/utils/customize-colors.ts"],
  "sourcesContent": ["// loaders.gl\n// SPDX-License-Identifier: MIT\n// Copyright (c) vis.gl contributors\n\nexport type {\n  BoundingVolumes,\n  Mbs,\n  Obb,\n  I3STilesetHeader,\n  I3STileContent,\n  I3STileHeader,\n  SceneLayer3D,\n  AttributeStorageInfo,\n  Field,\n  ESRIField,\n  PopupInfo,\n  Node3DIndexDocument,\n  LodSelection,\n  NodeReference,\n  Resource,\n  MaxScreenThresholdSQ,\n  NodeInPage,\n  SharedResources,\n  Attribute,\n  Extent,\n  FeatureAttribute,\n  FieldInfo,\n  I3SMaterialDefinition,\n  TextureDefinitionInfo,\n  MaterialDefinitionInfo,\n  FullExtent,\n  StatisticsInfo,\n  StatsInfo,\n  Histogram,\n  ValueCount,\n  BuildingSceneSublayer,\n  OperationalLayer,\n  TextureSetDefinitionFormats\n} from './types';\nexport type {I3SLoaderOptions} from './i3s-loader';\n\nexport {COORDINATE_SYSTEM} from './lib/parsers/constants';\n\nexport {I3SLoader} from './i3s-loader';\nexport {SLPKLoader} from './i3s-slpk-loader';\nexport {I3SContentLoader} from './i3s-content-loader';\nexport {I3SAttributeLoader, loadFeatureAttributes} from './i3s-attribute-loader';\nexport {I3SBuildingSceneLayerLoader} from './i3s-building-scene-layer-loader';\nexport {I3SNodePageLoader} from './i3s-node-page-loader';\nexport {ArcGISWebSceneLoader} from './arcgis-webscene-loader';\n\nexport {SLPKArchive} from './lib/parsers/parse-slpk/slpk-archieve';\nexport {parseSLPKArchive} from './lib/parsers/parse-slpk/parse-slpk';\nexport {LayerError} from './lib/parsers/parse-arcgis-webscene';\nexport {customizeColors} from './lib/utils/customize-colors';\nexport {type I3STileAttributes} from './lib/parsers/parse-i3s-attribute';\n", "// loaders.gl\n// SPDX-License-Identifier: MIT\n// Copyright (c) vis.gl contributors\n\nimport {GL} from '@loaders.gl/math';\n\nexport function getConstructorForDataFormat(dataType: string) {\n  switch (dataType) {\n    case 'UInt8':\n      return Uint8Array;\n    case 'UInt16':\n      return Uint16Array;\n    case 'UInt32':\n      return Uint32Array;\n    case 'Float32':\n      return Float32Array;\n    case 'UInt64':\n      return Float64Array;\n    default:\n      throw new Error(`parse i3s tile content: unknown type of data: ${dataType}`);\n  }\n}\n\nexport const GL_TYPE_MAP: {[key: string]: number} = {\n  UInt8: GL.UNSIGNED_BYTE,\n  UInt16: GL.UNSIGNED_SHORT,\n  Float32: GL.FLOAT,\n  UInt32: GL.UNSIGNED_INT,\n  UInt64: GL.DOUBLE\n};\n/**\n * Returns how many bytes a type occupies\n * @param dataType\n * @returns\n */\nexport function sizeOf(dataType: string): number {\n  switch (dataType) {\n    case 'UInt8':\n      return 1;\n    case 'UInt16':\n    case 'Int16':\n      return 2;\n    case 'UInt32':\n    case 'Int32':\n    case 'Float32':\n      return 4;\n    case 'UInt64':\n    case 'Int64':\n    case 'Float64':\n      return 8;\n    default:\n      throw new Error(`parse i3s tile content: unknown size of data: ${dataType}`);\n  }\n}\n\nexport const STRING_ATTRIBUTE_TYPE = 'String';\nexport const OBJECT_ID_ATTRIBUTE_TYPE = 'Oid32';\nexport const FLOAT_64_TYPE = 'Float64';\nexport const INT_16_ATTRIBUTE_TYPE = 'Int16';\n\n// https://github.com/visgl/deck.gl/blob/9548f43cba2234a1f4877b6b17f6c88eb35b2e08/modules/core/src/lib/constants.js#L27\n// Describes the format of positions\nexport enum COORDINATE_SYSTEM {\n  /**\n   * `LNGLAT` if rendering into a geospatial viewport, `CARTESIAN` otherwise\n   */\n  DEFAULT = -1,\n  /**\n   * Positions are interpreted as [lng, lat, elevation]\n   * lng lat are degrees, elevation is meters. distances as meters.\n   */\n  LNGLAT = 1,\n  /**\n   * Positions are interpreted as meter offsets, distances as meters\n   */\n  METER_OFFSETS = 2,\n  /**\n   * Positions are interpreted as lng lat offsets: [deltaLng, deltaLat, elevation]\n   * deltaLng, deltaLat are delta degrees, elevation is meters.\n   * distances as meters.\n   */\n  LNGLAT_OFFSETS = 3,\n  /**\n   * Non-geospatial\n   */\n  CARTESIAN = 0\n}\n", "// loaders.gl\n// SPDX-License-Identifier: MIT\n// Copyright vis.gl contributors\n\nimport type {LoaderWithParser, StrictLoaderOptions} from '@loaders.gl/loader-utils';\nimport {parse} from '@loaders.gl/core';\nimport type {I3STilesetHeader} from './types';\nimport {I3SContentLoader} from './i3s-content-loader';\nimport {normalizeTileData, normalizeTilesetData} from './lib/parsers/parse-i3s';\nimport {COORDINATE_SYSTEM} from './lib/parsers/constants';\nimport {I3SParseOptions} from './types';\nimport {getUrlWithoutParams} from './lib/utils/url-utils';\n\n// __VERSION__ is injected by babel-plugin-version-inline\n// @ts-ignore TS2304: Cannot find name '__VERSION__'.\nconst VERSION = typeof __VERSION__ !== 'undefined' ? __VERSION__ : 'latest';\n\nconst TILESET_REGEX = /layers\\/[0-9]+$/;\nconst LOCAL_SLPK_REGEX = /\\.slpk$/;\nconst TILE_HEADER_REGEX = /nodes\\/([0-9-]+|root)$/;\nconst SLPK_HEX = '504b0304';\nconst POINT_CLOUD = 'PointCloud';\n\nexport type I3SLoaderOptions = StrictLoaderOptions & {\n  i3s?: I3SParseOptions & {\n    /** For I3SAttributeLoader */\n    attributeName?: string;\n    /** For I3SAttributeLoader */\n    attributeType?: string;\n  };\n};\n\n/**\n * Loader for I3S - Indexed 3D Scene Layer\n */\nexport const I3SLoader = {\n  dataType: null as unknown as I3STilesetHeader,\n  batchType: null as never,\n\n  name: 'I3S (Indexed Scene Layers)',\n  id: 'i3s',\n  module: 'i3s',\n  version: VERSION,\n  mimeTypes: ['application/octet-stream'],\n  parse: parseI3S,\n  extensions: ['bin'],\n  options: {\n    i3s: {\n      token: undefined,\n      isTileset: 'auto',\n      isTileHeader: 'auto',\n      tile: undefined,\n      tileset: undefined,\n      _tileOptions: undefined,\n      _tilesetOptions: undefined,\n      useDracoGeometry: true,\n      useCompressedTextures: true,\n      decodeTextures: true,\n      coordinateSystem: COORDINATE_SYSTEM.METER_OFFSETS\n    }\n  }\n} as const satisfies LoaderWithParser<I3STilesetHeader, never, I3SLoaderOptions>;\n\nasync function parseI3S(data, options: I3SLoaderOptions = {}, context): Promise<I3STilesetHeader> {\n  const url = context.url;\n  options.i3s = options.i3s || {};\n  const magicNumber = getMagicNumber(data);\n\n  // check if file is slpk\n  if (magicNumber === SLPK_HEX) {\n    throw new Error('Files with .slpk extention currently are not supported by I3SLoader');\n  }\n\n  const urlWithoutParams = getUrlWithoutParams(url);\n\n  // auto detect file type based on url\n  let isTileset;\n  if (options.i3s.isTileset === 'auto') {\n    isTileset = TILESET_REGEX.test(urlWithoutParams) || LOCAL_SLPK_REGEX.test(urlWithoutParams);\n  } else {\n    isTileset = options.i3s.isTileset;\n  }\n\n  let isTileHeader;\n  if (options.i3s.isTileHeader === 'auto') {\n    isTileHeader = TILE_HEADER_REGEX.test(urlWithoutParams);\n  } else {\n    isTileHeader = options.i3s.isTileHeader;\n  }\n\n  if (isTileset) {\n    data = await parseTileset(data, options, context);\n  } else if (isTileHeader) {\n    data = await parseTile(data, context);\n  } else {\n    data = await parseTileContent(data, options);\n  }\n\n  return data;\n}\n\nasync function parseTileContent(arrayBuffer, options: I3SLoaderOptions) {\n  return await parse(arrayBuffer, I3SContentLoader, options);\n}\n\nasync function parseTileset(data, options: I3SLoaderOptions, context) {\n  const tilesetJson = JSON.parse(new TextDecoder().decode(data));\n\n  if (tilesetJson?.layerType === POINT_CLOUD) {\n    throw new Error('Point Cloud layers currently are not supported by I3SLoader');\n  }\n\n  const tilesetPostprocessed = await normalizeTilesetData(tilesetJson, options, context);\n  return tilesetPostprocessed;\n}\n\nasync function parseTile(data, context) {\n  data = JSON.parse(new TextDecoder().decode(data));\n  return normalizeTileData(data, context);\n}\n\nfunction getMagicNumber(data) {\n  if (data instanceof ArrayBuffer) {\n    // slice binary data (4 bytes from the beginning) and transform it to hexadecimal numeral system\n    return [...new Uint8Array(data, 0, 4)]\n      .map((value) => value.toString(16).padStart(2, '0'))\n      .join('');\n  }\n  return null;\n}\n", "import type {TypedArray} from '@loaders.gl/schema';\nimport {load, parse} from '@loaders.gl/core';\nimport {Vector3, Matrix4} from '@math.gl/core';\nimport {Ellipsoid} from '@math.gl/geospatial';\nimport {StrictLoaderOptions, LoaderContext, parseFromContext} from '@loaders.gl/loader-utils';\nimport {ImageLoader} from '@loaders.gl/images';\nimport {DracoLoader, DracoMesh} from '@loaders.gl/draco';\nimport {BasisLoader, CompressedTextureLoader} from '@loaders.gl/textures';\n\nimport {\n  FeatureAttribute,\n  VertexAttribute,\n  I3SMeshAttributes,\n  I3SMeshAttribute,\n  TileContentTexture,\n  HeaderAttributeProperty,\n  I3SMaterialDefinition,\n  I3STileContent,\n  I3STileOptions,\n  I3STilesetOptions\n} from '../../types';\nimport {getUrlWithToken} from '../utils/url-utils';\n\nimport {GL_TYPE_MAP, getConstructorForDataFormat, sizeOf, COORDINATE_SYSTEM} from './constants';\nimport {I3SLoaderOptions} from '../../i3s-loader';\n\nconst scratchVector = new Vector3([0, 0, 0]);\n\nfunction getLoaderForTextureFormat(textureFormat?: 'jpg' | 'png' | 'ktx-etc2' | 'dds' | 'ktx2') {\n  switch (textureFormat) {\n    case 'ktx-etc2':\n    case 'dds':\n      return CompressedTextureLoader;\n    case 'ktx2':\n      return BasisLoader;\n    case 'jpg':\n    case 'png':\n    default:\n      return ImageLoader;\n  }\n}\n\nconst I3S_ATTRIBUTE_TYPE = 'i3s-attribute-type';\n\nexport async function parseI3STileContent(\n  arrayBuffer: ArrayBuffer,\n  tileOptions: I3STileOptions,\n  tilesetOptions: I3STilesetOptions,\n  options?: StrictLoaderOptions,\n  context?: LoaderContext\n): Promise<I3STileContent> {\n  const content: I3STileContent = {\n    attributes: {},\n    indices: null,\n    featureIds: [],\n    vertexCount: 0,\n    modelMatrix: new Matrix4(),\n    coordinateSystem: 0,\n    byteLength: 0,\n    texture: null\n  };\n\n  if (tileOptions.textureUrl) {\n    // @ts-expect-error options is not properly typed\n    const url = getUrlWithToken(tileOptions.textureUrl, options?.i3s?.token);\n    const loader = getLoaderForTextureFormat(tileOptions.textureFormat);\n    const fetchFunc = context?.fetch || fetch;\n    const response = await fetchFunc(url); // options?.fetch\n    const arrayBuffer = await response.arrayBuffer();\n\n    // @ts-expect-error options is not properly typed\n    if (options?.i3s.decodeTextures) {\n      // TODO - replace with switch\n      if (loader === ImageLoader) {\n        const options = {...tileOptions.textureLoaderOptions, image: {type: 'data'}};\n        try {\n          // Image constructor is not supported in worker thread.\n          // Do parsing image data on the main thread by using context to avoid worker issues.\n          const texture: any = await parseFromContext(arrayBuffer, [], options, context!);\n          content.texture = texture;\n        } catch (e) {\n          // context object is different between worker and node.js conversion script.\n          // To prevent error we parse data in ordinary way if it is not parsed by using context.\n          const texture: any = await parse(arrayBuffer, loader, options, context);\n          content.texture = texture;\n        }\n      } else if (loader === CompressedTextureLoader || loader === BasisLoader) {\n        let texture: any = await load(arrayBuffer, loader, tileOptions.textureLoaderOptions);\n        if (loader === BasisLoader) {\n          texture = texture[0];\n        }\n        content.texture = {\n          compressed: true,\n          mipmaps: false,\n          width: texture[0].width,\n          height: texture[0].height,\n          data: texture\n        };\n      }\n    } else {\n      content.texture = arrayBuffer;\n    }\n  }\n\n  content.material = makePbrMaterial(tileOptions.materialDefinition, content.texture);\n  if (content.material) {\n    content.texture = null;\n  }\n\n  return await parseI3SNodeGeometry(arrayBuffer, content, tileOptions, tilesetOptions, options);\n}\n\n/* eslint-disable max-statements */\nasync function parseI3SNodeGeometry(\n  arrayBuffer: ArrayBuffer,\n  content: I3STileContent,\n  tileOptions: I3STileOptions,\n  tilesetOptions: I3STilesetOptions,\n  options?: I3SLoaderOptions\n): Promise<I3STileContent> {\n  const contentByteLength = arrayBuffer.byteLength;\n  let attributes: I3SMeshAttributes;\n  let vertexCount: number;\n  let byteOffset: number = 0;\n  let featureCount: number = 0;\n  let indices: TypedArray | undefined;\n\n  if (tileOptions.isDracoGeometry) {\n    const decompressedGeometry: DracoMesh = await parse(arrayBuffer, DracoLoader, {\n      draco: {\n        attributeNameEntry: I3S_ATTRIBUTE_TYPE\n      }\n    });\n    // @ts-expect-error\n    vertexCount = decompressedGeometry.header.vertexCount;\n    indices = decompressedGeometry.indices?.value;\n    const {\n      POSITION,\n      NORMAL,\n      COLOR_0,\n      TEXCOORD_0,\n      ['feature-index']: featureIndex,\n      ['uv-region']: uvRegion\n    } = decompressedGeometry.attributes;\n\n    attributes = {\n      position: POSITION,\n      normal: NORMAL,\n      color: COLOR_0,\n      uv0: TEXCOORD_0,\n      uvRegion,\n      id: featureIndex\n    };\n\n    updateAttributesMetadata(attributes, decompressedGeometry);\n\n    const featureIds = getFeatureIdsFromFeatureIndexMetadata(featureIndex);\n\n    if (featureIds) {\n      flattenFeatureIdsByFeatureIndices(attributes, featureIds);\n    }\n  } else {\n    const {\n      vertexAttributes,\n      ordering: attributesOrder,\n      featureAttributes,\n      featureAttributeOrder\n    } = tilesetOptions.store.defaultGeometrySchema;\n    // First 8 bytes reserved for header (vertexCount and featureCount)\n    const headers = parseHeaders(arrayBuffer, tilesetOptions);\n    byteOffset = headers.byteOffset;\n    vertexCount = headers.vertexCount;\n    featureCount = headers.featureCount;\n    // Getting vertex attributes such as positions, normals, colors, etc...\n    const {attributes: normalizedVertexAttributes, byteOffset: offset} = normalizeAttributes(\n      arrayBuffer,\n      byteOffset,\n      vertexAttributes,\n      vertexCount,\n      attributesOrder\n    );\n\n    // Getting feature attributes such as featureIds and faceRange\n    const {attributes: normalizedFeatureAttributes} = normalizeAttributes(\n      arrayBuffer,\n      offset,\n      featureAttributes,\n      featureCount,\n      featureAttributeOrder\n    );\n\n    flattenFeatureIdsByFaceRanges(normalizedFeatureAttributes);\n    attributes = concatAttributes(normalizedVertexAttributes, normalizedFeatureAttributes);\n  }\n\n  if (\n    !options?.i3s?.coordinateSystem ||\n    // eslint-disable-next-line @typescript-eslint/no-unsafe-enum-comparison\n    options.i3s.coordinateSystem === COORDINATE_SYSTEM.METER_OFFSETS\n  ) {\n    const enuMatrix = parsePositions(attributes.position, tileOptions);\n    content.modelMatrix = enuMatrix.invert();\n    content.coordinateSystem = COORDINATE_SYSTEM.METER_OFFSETS;\n  } else {\n    content.modelMatrix = getModelMatrix(attributes.position);\n    content.coordinateSystem = COORDINATE_SYSTEM.LNGLAT_OFFSETS;\n  }\n\n  content.attributes = {\n    positions: attributes.position,\n    normals: attributes.normal,\n    colors: normalizeAttribute(attributes.color), // Normalize from UInt8\n    texCoords: attributes.uv0,\n    uvRegions: normalizeAttribute(attributes.uvRegion || attributes.region) // Normalize from UInt16\n  };\n  content.indices = indices || null;\n\n  if (attributes.id && attributes.id.value) {\n    content.featureIds = attributes.id.value;\n  }\n\n  // Remove undefined attributes\n  for (const attributeIndex in content.attributes) {\n    if (!content.attributes[attributeIndex]) {\n      delete content.attributes[attributeIndex];\n    }\n  }\n\n  content.vertexCount = vertexCount;\n  content.byteLength = contentByteLength;\n\n  return content;\n}\n\n/**\n * Update attributes with metadata from decompressed geometry.\n * @param decompressedGeometry\n * @param attributes\n */\nfunction updateAttributesMetadata(\n  attributes: I3SMeshAttributes,\n  decompressedGeometry: DracoMesh\n): void {\n  for (const key in decompressedGeometry.loaderData.attributes) {\n    const dracoAttribute = decompressedGeometry.loaderData.attributes[key];\n\n    switch (dracoAttribute.name) {\n      case 'POSITION':\n        attributes.position.metadata = dracoAttribute.metadata;\n        break;\n      case 'feature-index':\n        attributes.id.metadata = dracoAttribute.metadata;\n        break;\n      default:\n        break;\n    }\n  }\n}\n\n/**\n * Do concatenation of attribute objects.\n * Done as separate fucntion to avoid ts errors.\n * @param normalizedVertexAttributes\n * @param normalizedFeatureAttributes\n * @returns - result of attributes concatenation.\n */\nfunction concatAttributes(\n  normalizedVertexAttributes: I3SMeshAttributes,\n  normalizedFeatureAttributes: I3SMeshAttributes\n): I3SMeshAttributes {\n  return {...normalizedVertexAttributes, ...normalizedFeatureAttributes};\n}\n\n/**\n * Normalize attribute to range [0..1] . Eg. convert colors buffer from [255,255,255,255] to [1,1,1,1]\n * @param attribute - geometry attribute\n * @returns - geometry attribute in right format\n */\nfunction normalizeAttribute(attribute: I3SMeshAttribute): I3SMeshAttribute {\n  if (!attribute) {\n    return attribute;\n  }\n  attribute.normalized = true;\n  return attribute;\n}\n\nfunction parseHeaders(arrayBuffer: ArrayBuffer, options: I3STilesetOptions) {\n  let byteOffset = 0;\n  // First 8 bytes reserved for header (vertexCount and featurecount)\n  let vertexCount = 0;\n  let featureCount = 0;\n  for (const {property, type} of options.store.defaultGeometrySchema.header) {\n    const TypedArrayTypeHeader = getConstructorForDataFormat(type);\n    switch (property) {\n      case HeaderAttributeProperty.vertexCount.toString():\n        vertexCount = new TypedArrayTypeHeader(arrayBuffer, 0, 4)[0];\n        byteOffset += sizeOf(type);\n        break;\n      case HeaderAttributeProperty.featureCount.toString():\n        featureCount = new TypedArrayTypeHeader(arrayBuffer, 4, 4)[0];\n        byteOffset += sizeOf(type);\n        break;\n      default:\n        break;\n    }\n  }\n\n  return {\n    vertexCount,\n    featureCount,\n    byteOffset\n  };\n}\n\n/* eslint-enable max-statements */\n\nfunction normalizeAttributes(\n  arrayBuffer: ArrayBuffer,\n  byteOffset: number,\n  vertexAttributes: VertexAttribute | FeatureAttribute,\n  attributeCount: number,\n  attributesOrder: string[]\n) {\n  const attributes: I3SMeshAttributes = {};\n\n  // the order of attributes depend on the order being added to the vertexAttributes object\n  for (const attribute of attributesOrder) {\n    if (vertexAttributes[attribute]) {\n      const {valueType, valuesPerElement}: {valueType: string; valuesPerElement: number} =\n        vertexAttributes[attribute];\n      // protect from arrayBuffer read overunns by NOT assuming node has regions always even though its declared in defaultGeometrySchema.\n      // In i3s 1.6: client is required to decide that based on ./shared resource of the node (materialDefinitions.[Mat_id].params.vertexRegions == true)\n      // In i3s 1.7 the property has been rolled into the 3d scene layer json/node pages.\n      // Code below does not account when the bytelength is actually bigger than\n      // the calculated value (b\\c the tile potentially could have mesh segmentation information).\n      // In those cases tiles without regions could fail or have garbage values.\n      if (\n        byteOffset + attributeCount * valuesPerElement * sizeOf(valueType) <=\n        arrayBuffer.byteLength\n      ) {\n        const buffer = arrayBuffer.slice(byteOffset);\n        let value: TypedArray;\n\n        if (valueType === 'UInt64') {\n          value = parseUint64Values(buffer, attributeCount * valuesPerElement, sizeOf(valueType));\n        } else {\n          const TypedArrayType = getConstructorForDataFormat(valueType);\n          value = new TypedArrayType(buffer, 0, attributeCount * valuesPerElement);\n        }\n\n        attributes[attribute] = {\n          value,\n          type: GL_TYPE_MAP[valueType],\n          size: valuesPerElement\n        };\n\n        switch (attribute) {\n          case 'color':\n            attributes.color.normalized = true;\n            break;\n          case 'position':\n          case 'region':\n          case 'normal':\n          default:\n        }\n\n        byteOffset = byteOffset + attributeCount * valuesPerElement * sizeOf(valueType);\n      } else if (attribute !== 'uv0') {\n        break;\n      }\n    }\n  }\n\n  return {attributes, byteOffset};\n}\n\n/**\n * Parse buffer to return array of uint64 values\n *\n * @param buffer\n * @param elementsCount\n * @returns 64-bit array of values until precision is lost after Number.MAX_SAFE_INTEGER\n */\nfunction parseUint64Values(\n  buffer: ArrayBuffer,\n  elementsCount: number,\n  attributeSize: number\n): Uint32Array {\n  const values: number[] = [];\n  const dataView = new DataView(buffer);\n  let offset = 0;\n\n  for (let index = 0; index < elementsCount; index++) {\n    // split 64-bit number into two 32-bit parts\n    const left = dataView.getUint32(offset, true);\n    const right = dataView.getUint32(offset + 4, true);\n    // combine the two 32-bit values\n    const value = left + 2 ** 32 * right;\n\n    values.push(value);\n    offset += attributeSize;\n  }\n\n  return new Uint32Array(values);\n}\n\nfunction parsePositions(attribute: I3SMeshAttribute, options: I3STileOptions): Matrix4 {\n  const mbs = options.mbs;\n  const value = attribute.value;\n  const metadata = attribute.metadata;\n  const enuMatrix = new Matrix4();\n  const cartographicOrigin = new Vector3(mbs[0], mbs[1], mbs[2]);\n  const cartesianOrigin = new Vector3();\n  Ellipsoid.WGS84.cartographicToCartesian(cartographicOrigin, cartesianOrigin);\n  Ellipsoid.WGS84.eastNorthUpToFixedFrame(cartesianOrigin, enuMatrix);\n  attribute.value = offsetsToCartesians(value, metadata, cartographicOrigin);\n\n  return enuMatrix;\n}\n\n/**\n * Converts position coordinates to absolute cartesian coordinates\n * @param vertices - \"position\" attribute data\n * @param metadata - When the geometry is DRACO compressed, contain position attribute's metadata\n *  https://github.com/Esri/i3s-spec/blob/master/docs/1.7/compressedAttributes.cmn.md\n * @param cartographicOrigin - Cartographic origin coordinates\n * @returns - converted \"position\" data\n */\nfunction offsetsToCartesians(\n  vertices: number[] | TypedArray,\n  metadata: any = {},\n  cartographicOrigin: Vector3\n): Float64Array {\n  const positions = new Float64Array(vertices.length);\n  const scaleX = (metadata['i3s-scale_x'] && metadata['i3s-scale_x'].double) || 1;\n  const scaleY = (metadata['i3s-scale_y'] && metadata['i3s-scale_y'].double) || 1;\n  for (let i = 0; i < positions.length; i += 3) {\n    positions[i] = vertices[i] * scaleX + cartographicOrigin.x;\n    positions[i + 1] = vertices[i + 1] * scaleY + cartographicOrigin.y;\n    positions[i + 2] = vertices[i + 2] + cartographicOrigin.z;\n  }\n\n  for (let i = 0; i < positions.length; i += 3) {\n    // @ts-ignore\n    Ellipsoid.WGS84.cartographicToCartesian(positions.subarray(i, i + 3), scratchVector);\n    positions[i] = scratchVector.x;\n    positions[i + 1] = scratchVector.y;\n    positions[i + 2] = scratchVector.z;\n  }\n\n  return positions;\n}\n\n/**\n * Get model matrix for loaded vertices\n * @param positions positions attribute\n * @returns Matrix4 - model matrix for geometry transformation\n */\nfunction getModelMatrix(positions: I3SMeshAttribute): Matrix4 {\n  const metadata = positions.metadata;\n  const scaleX: number = metadata?.['i3s-scale_x']?.double || 1;\n  const scaleY: number = metadata?.['i3s-scale_y']?.double || 1;\n  const modelMatrix = new Matrix4();\n  modelMatrix[0] = scaleX;\n  modelMatrix[5] = scaleY;\n  return modelMatrix;\n}\n\n/**\n * Makes a glTF-compatible PBR material from an I3S material definition\n * @param materialDefinition - i3s material definition\n *  https://github.com/Esri/i3s-spec/blob/master/docs/1.7/materialDefinitions.cmn.md\n * @param texture - texture image\n * @returns {object}\n */\nfunction makePbrMaterial(materialDefinition?: I3SMaterialDefinition, texture?: TileContentTexture) {\n  let pbrMaterial;\n  if (materialDefinition) {\n    pbrMaterial = {\n      ...materialDefinition,\n      pbrMetallicRoughness: materialDefinition.pbrMetallicRoughness\n        ? {...materialDefinition.pbrMetallicRoughness}\n        : {baseColorFactor: [255, 255, 255, 255]}\n    };\n  } else {\n    pbrMaterial = {\n      pbrMetallicRoughness: {}\n    };\n    if (texture) {\n      pbrMaterial.pbrMetallicRoughness.baseColorTexture = {texCoord: 0};\n    } else {\n      pbrMaterial.pbrMetallicRoughness.baseColorFactor = [255, 255, 255, 255];\n    }\n  }\n\n  // Set default 0.25 per spec https://github.com/Esri/i3s-spec/blob/master/docs/1.7/materialDefinitions.cmn.md\n  pbrMaterial.alphaCutoff = pbrMaterial.alphaCutoff || 0.25;\n\n  if (pbrMaterial.alphaMode) {\n    // I3S contain alphaMode in lowerCase\n    pbrMaterial.alphaMode = pbrMaterial.alphaMode.toUpperCase();\n  }\n\n  // Convert colors from [255,255,255,255] to [1,1,1,1]\n  if (pbrMaterial.emissiveFactor) {\n    pbrMaterial.emissiveFactor = convertColorFormat(pbrMaterial.emissiveFactor);\n  }\n  if (pbrMaterial.pbrMetallicRoughness && pbrMaterial.pbrMetallicRoughness.baseColorFactor) {\n    pbrMaterial.pbrMetallicRoughness.baseColorFactor = convertColorFormat(\n      pbrMaterial.pbrMetallicRoughness.baseColorFactor\n    );\n  }\n\n  if (texture) {\n    setMaterialTexture(pbrMaterial, texture);\n  }\n\n  return pbrMaterial;\n}\n\n/**\n * Convert color from [255,255,255,255] to [1,1,1,1]\n * @param colorFactor - color array\n * @returns - new color array\n */\nfunction convertColorFormat(colorFactor: number[]): number[] {\n  const normalizedColor = [...colorFactor];\n  for (let index = 0; index < colorFactor.length; index++) {\n    normalizedColor[index] = colorFactor[index] / 255;\n  }\n  return normalizedColor;\n}\n\n/**\n * Set texture in PBR material\n * @param {object} material - i3s material definition\n * @param image - texture image\n * @returns\n */\nfunction setMaterialTexture(material, image: TileContentTexture): void {\n  const texture = {source: {image}};\n  // I3SLoader now support loading only one texture. This elseif sequence will assign this texture to one of\n  // properties defined in materialDefinition\n  if (material.pbrMetallicRoughness && material.pbrMetallicRoughness.baseColorTexture) {\n    material.pbrMetallicRoughness.baseColorTexture = {\n      ...material.pbrMetallicRoughness.baseColorTexture,\n      texture\n    };\n  } else if (material.emissiveTexture) {\n    material.emissiveTexture = {...material.emissiveTexture, texture};\n  } else if (\n    material.pbrMetallicRoughness &&\n    material.pbrMetallicRoughness.metallicRoughnessTexture\n  ) {\n    material.pbrMetallicRoughness.metallicRoughnessTexture = {\n      ...material.pbrMetallicRoughness.metallicRoughnessTexture,\n      texture\n    };\n  } else if (material.normalTexture) {\n    material.normalTexture = {...material.normalTexture, texture};\n  } else if (material.occlusionTexture) {\n    material.occlusionTexture = {...material.occlusionTexture, texture};\n  }\n}\n\n/**\n * Flatten feature ids using face ranges\n * @param normalizedFeatureAttributes\n * @returns\n */\nfunction flattenFeatureIdsByFaceRanges(normalizedFeatureAttributes: I3SMeshAttributes): void {\n  const {id, faceRange} = normalizedFeatureAttributes;\n\n  if (!id || !faceRange) {\n    return;\n  }\n\n  const featureIds = id.value;\n  const range = faceRange.value;\n  const featureIdsLength = range[range.length - 1] + 1;\n  const orderedFeatureIndices = new Uint32Array(featureIdsLength * 3);\n\n  let featureIndex = 0;\n  let startIndex = 0;\n\n  for (let index = 1; index < range.length; index += 2) {\n    const fillId = Number(featureIds[featureIndex]);\n    const endValue = range[index];\n    const prevValue = range[index - 1];\n    const trianglesCount = endValue - prevValue + 1;\n    const endIndex = startIndex + trianglesCount * 3;\n\n    orderedFeatureIndices.fill(fillId, startIndex, endIndex);\n\n    featureIndex++;\n    startIndex = endIndex;\n  }\n\n  normalizedFeatureAttributes.id.value = orderedFeatureIndices;\n}\n\n/**\n * Flatten feature ids using featureIndices\n * @param attributes\n * @param featureIds\n * @returns\n */\nfunction flattenFeatureIdsByFeatureIndices(\n  attributes: I3SMeshAttributes,\n  featureIds: Int32Array\n): void {\n  const featureIndices = attributes.id.value;\n  const result = new Float32Array(featureIndices.length);\n\n  for (let index = 0; index < featureIndices.length; index++) {\n    result[index] = featureIds[featureIndices[index]];\n  }\n\n  attributes.id.value = result;\n}\n\n/**\n * Flatten feature ids using featureIndices\n * @param featureIndex\n * @returns\n */\nfunction getFeatureIdsFromFeatureIndexMetadata(\n  featureIndex: I3SMeshAttribute\n): Int32Array | undefined {\n  return featureIndex?.metadata?.['i3s-feature-ids']?.intArray;\n}\n", "import type {Matrix4, Quaternion, Vector3} from '@math.gl/core';\nimport type {TypedArray, MeshAttribute, TextureLevel} from '@loaders.gl/schema';\nimport {TILESET_TYPE, TILE_REFINEMENT, TILE_TYPE, Tile3D, Tileset3D} from '@loaders.gl/tiles';\nimport I3SNodePagesTiles from './lib/helpers/i3s-nodepages-tiles';\nimport {LoaderWithParser} from '@loaders.gl/loader-utils';\n\nexport type COLOR = [number, number, number, number];\n\n/**\n * Extension of SceneLayer3D JSON with postprocessed loader data\n */\nexport interface I3STilesetHeader extends SceneLayer3D {\n  /** Not in spec, but is necessary for woking */\n  url?: string;\n  /** Base path that non-absolute paths in tileset are relative to. */\n  basePath?: string;\n  /** root node metadata */\n  root: I3STileHeader;\n  /** instance of the NodePages to tiles loader */\n  nodePagesTile?: I3SNodePagesTiles;\n  /** Type of the tileset */\n  type: TILESET_TYPE.I3S;\n  /** LOD metric type per I3S spec*/\n  lodMetricType?: string;\n  /** LOD metric value */\n  lodMetricValue?: number;\n  /** Loader that has to be used to load content */\n  loader: LoaderWithParser;\n}\n/** https://github.com/Esri/i3s-spec/blob/master/docs/1.8/nodePage.cmn.md */\nexport type NodePage = {\n  /** Array of nodes. */\n  nodes: NodeInPage[];\n};\n/**\n * Spec - https://github.com/Esri/i3s-spec/blob/master/docs/1.8/mesh.cmn.md\n */\ntype NodeMesh = {\n  /**\n   * The material definition.\n   */\n  material: MeshMaterial;\n  /** The geometry definition. */\n  geometry: MeshGeometry;\n  /** The attribute set definition. */\n  attribute: meshAttribute;\n};\n/** Spec - https://github.com/Esri/i3s-spec/blob/master/docs/1.8/meshMaterial.cmn.md */\nexport type MeshMaterial = {\n  /** The index in layer.materialDefinitions array. */\n  definition: number;\n  /** Resource id for the material textures. i.e: layers/0/nodes/{material.resource}/textures/{tex_name}. Is required if material declares any textures. */\n  resource?: number;\n  /** Estimated number of texel for the highest resolution base color texture. */\n  texelCountHint?: number;\n};\n/** Spec - https://github.com/Esri/i3s-spec/blob/master/docs/1.8/meshGeometry.cmn.md */\nexport type MeshGeometry = {\n  /** The index in layer.geometryDefinitions array */\n  definition: number;\n  /** The resource locator to be used to query geometry resources: layers/0/nodes/{this.resource}/geometries/{layer.geometryDefinitions[this.definition].geometryBuffers[0 or 1]}. */\n  resource: number;\n  /** Number of vertices in the geometry buffer of this mesh for the umcompressed mesh buffer. Please note that Draco compressed meshes may have less vertices due to de-duplication (actual number of vertices is part of the Draco binary blob). Default=0 */\n  vertexCount?: number;\n  /** Number of features for this mesh. Default=0. (Must omit or set to 0 if mesh doesn't use features.) */\n  featureCount?: number;\n};\n/** https://github.com/Esri/i3s-spec/blob/master/docs/1.8/meshAttribute.cmn.md */\ntype meshAttribute = {\n  /** The resource identifier to be used to locate attribute resources of this mesh. i.e. layers/0/nodes/<resource id>/attributes/... */\n  resource: number;\n};\n\n/**\n * Texture format\n * @see https://github.com/Esri/i3s-spec/blob/master/docs/1.7/textureSetDefinitionFormat.cmn.md\n */\nexport type I3STextureFormat = 'jpg' | 'png' | 'ktx-etc2' | 'dds' | 'ktx2';\n\n/** Postprocessed I3S Node */\nexport type I3STileHeader = I3SMinimalNodeData & {\n  /** MBS per I3S spec */\n  mbs: Mbs;\n  /** Material definition from the layer metadata per I3S spec */\n  materialDefinition?: I3SMaterialDefinition;\n  /** Bounding volume converted to 3DTiles format. It is generic for `tile` module */\n  boundingVolume: {box?: number[]; sphere?: number[]};\n  /** LOD metric selected for usage */\n  lodMetricType?: string;\n  /** LOD metric value */\n  lodMetricValue?: number;\n  /** Tile content type */\n  type: TILE_TYPE.MESH;\n  /** Tile refinement type. I3S supports only `REPLACE` */\n  refine: TILE_REFINEMENT.REPLACE;\n};\n\n/**\n * Minimal I3S node data is needed for loading\n * These data can come from 3DNodeIndexDocument (I3S spec) or from `I3SNodePagesTiles` instance\n * @see https://github.com/Esri/i3s-spec/blob/master/docs/1.7/3DNodeIndexDocument.cmn.md\n */\nexport type I3SMinimalNodeData = {\n  /** Node ID */\n  id: string;\n  /** Node base path */\n  url?: string;\n  /** LOD selection metrics  */\n  lodSelection?: LodSelection[];\n  // OBB per I3S spec\n  obb?: Obb;\n  /** MBS per I3S spec */\n  mbs?: Mbs;\n  /** Geometry content URL */\n  contentUrl?: string;\n  /** Texture image URL */\n  textureUrl?: string;\n  /** Feature attributes URLs */\n  attributeUrls?: string[];\n  /** Material definition from I3S layer metadata */\n  materialDefinition?: I3SMaterialDefinition;\n  /** Texture format per I3S spec */\n  textureFormat: I3STextureFormat;\n  /** Loader options for texture loader. The loader might be `CompressedTextureLoader` for `dds`, BasisLoader for `ktx2` or ImageLoader for `jpg`and `png` */\n  textureLoaderOptions?: {[key: string]: any};\n  /** Child Nodes references  */\n  children: NodeReference[];\n  /** Is the node has Draco compressed geometry */\n  isDracoGeometry: boolean;\n};\n\nexport type I3SParseOptions = {\n  /** ArcGIS access token */\n  token?: string;\n  /** Is 3DSceneLayer json expected in response */\n  isTileset?: string;\n  /** Is 3DNodeIndexDocument json expected in response */\n  isTileHeader?: string;\n  /** Tile3D instance. This property used only to load tile content */\n  /** Tile-specific options */\n  _tileOptions?: I3STileOptions;\n  /** Tileset-specific options */\n  _tilesetOptions?: I3STilesetOptions;\n  /** Load Draco Compressed geometry if available */\n  useDracoGeometry?: boolean;\n  /** Load compressed textures if available */\n  useCompressedTextures?: boolean;\n  /** Set false if don't need to parse textures */\n  decodeTextures?: boolean;\n  /** deck.gl compatible coordinate system.\n   * https://github.com/visgl/deck.gl/blob/master/docs/developer-guide/coordinate-systems.md\n   * Supported coordinate systems: METER_OFFSETS, LNGLAT_OFFSETS\n   */\n  coordinateSystem?: number;\n  /** Options to colorize 3DObjects by attribute value */\n  colorsByAttribute?: {\n    /** Feature attribute name */\n    attributeName: string;\n    /** Minimum attribute value */\n    minValue: number;\n    /** Maximum attribute value */\n    maxValue: number;\n    /** Minimum color. 3DObject will be colorized with gradient from `minColor to `maxColor` */\n    minColor: COLOR;\n    /** Maximum color. 3DObject will be colorized with gradient from `minColor to `maxColor` */\n    maxColor: COLOR;\n    /** Colorization mode. `replace` - replace vertex colors with a new colors, `multiply` - multiply vertex colors with new colors */\n    mode: 'multiply' | 'replace';\n  };\n\n  /** @deprecated */\n  tile?: Tile3D | I3STileOptions;\n  /** Tileset3D instance. This property used only to load tile content */\n  /** @deprecated */\n  tileset?: Tileset3D | I3STilesetOptions;\n};\n\nexport type I3STileOptions = {\n  isDracoGeometry: boolean;\n  textureUrl?: string;\n  textureFormat?: I3STextureFormat;\n  textureLoaderOptions?: any;\n  materialDefinition?: I3SMaterialDefinition;\n  attributeUrls: string[];\n  mbs: Mbs;\n};\n\nexport type I3STilesetOptions = {\n  store: Store;\n  attributeStorageInfo: AttributeStorageInfo[];\n  fields: Field[];\n};\n\n// TODO Replace \"[key: string]: any\" with actual defenition\nexport type I3STileContent = {\n  attributes: I3SMeshAttributes;\n  indices: TypedArray | null;\n  featureIds: number[] | TypedArray;\n  vertexCount: number;\n  modelMatrix: Matrix4;\n  coordinateSystem: number;\n  byteLength: number;\n  texture: TileContentTexture;\n  [key: string]: any;\n};\n\nexport type TileContentTexture =\n  | ArrayBuffer\n  | {\n      compressed: boolean;\n      mipmaps: boolean;\n      width: number;\n      height: number;\n      data: TextureLevel[];\n    }\n  | null;\n\nexport type BoundingVolumes = {\n  mbs: Mbs;\n  obb: Obb;\n};\n\n/**\n * Oriented bounding box per I3S spec\n * @see https://github.com/Esri/i3s-spec/blob/master/docs/1.7/obb.cmn.md\n */\nexport type Obb = {\n  center: number[] | Vector3;\n  halfSize: number[] | Vector3;\n  quaternion: number[] | Quaternion;\n};\n\n/**\n * Minimum bounding sphere per I3S spec\n * @see https://github.com/Esri/i3s-spec/blob/master/docs/1.7/3DNodeIndexDocument.cmn.md#properties\n */\nexport type Mbs = [number, number, number, number];\n\n/** SceneLayer3D based on I3S specification - https://github.com/Esri/i3s-spec/blob/master/docs/1.8/3DSceneLayer.cmn.md */\nexport type SceneLayer3D = {\n  /** Unique numeric ID of the layer. */\n  id: number;\n  /** The relative URL to the 3DSceneLayerResource. Only present as part of the SceneServiceInfo resource. */\n  href?: string;\n  /** The user-visible layer type */\n  layerType: '3DObject' | 'IntegratedMesh';\n  /** The spatialReference of the layer including the vertical coordinate reference system (CRS). Well Known Text (WKT) for CRS is included to support custom CRS. */\n  spatialReference?: SpatialReference;\n  /** Enables consuming clients to quickly determine whether this layer is compatible (with respect to its horizontal and vertical coordinate system) with existing content. */\n  heightModelInfo?: HeightModelInfo;\n  /** The ID of the last update session in which any resource belonging to this layer has been updated. */\n  version: string;\n  /** The name of this layer. */\n  name?: string;\n  /** The time of the last update. */\n  serviceUpdateTimeStamp?: {lastUpdate: number};\n  /** The display alias to be used for this layer. */\n  alias?: string;\n  /** Description string for this layer. */\n  description?: string;\n  /** Copyright and usage information for the data in this layer. */\n  copyrightText?: string;\n  /** Capabilities supported by this layer. */\n  capabilities: string[];\n  /** ZFactor to define conversion factor for elevation unit. */\n  ZFactor?: number;\n  /** Indicates if any styling information represented as drawingInfo is captured as part of the binary mesh representation. */\n  cachedDrawingInfo?: CachedDrawingInfo;\n  /** An object containing drawing information. */\n  drawingInfo?: DrawingInfo;\n  /** An object containing elevation drawing information. If absent, any content of the scene layer is drawn at its z coordinate. */\n  elevationInfo?: ElevationInfo;\n  /** PopupInfo of the scene layer. */\n  popupInfo?: PopupInfo;\n  /** Indicates if client application will show the popup information. Default is FALSE. */\n  disablePopup: boolean;\n  /**\n   * The store object describes the exact physical storage of a layer and\n   * enables the client to detect when multiple layers are served from\n   * the same store.\n   */\n  store: Store;\n  /** A collection of objects that describe each attribute field regarding its field name, datatype, and a user friendly name {name,type,alias}. */\n  fields?: Field[];\n  /** Provides the schema and layout used for storing attribute content in binary format in I3S. */\n  attributeStorageInfo?: AttributeStorageInfo[];\n  /** Contains the statistical information for a layer. */\n  statisticsInfo?: StatisticsInfo[];\n  /** The paged-access index description. */\n  nodePages?: NodePageDefinition;\n  /** List of materials classes used in this layer. */\n  materialDefinitions?: I3SMaterialDefinition[];\n  /** Defines the set of textures that can be referenced by meshes. */\n  textureSetDefinitions?: TextureSetDefinition[];\n  /** Define the layouts of mesh geometry and its attributes */\n  geometryDefinitions?: GeometryDefinition[];\n  /** 3D extent. */\n  fullExtent?: FullExtent;\n};\n/** Spec - https://github.com/Esri/i3s-spec/blob/master/docs/1.8/cachedDrawingInfo.cmn.md */\nexport type CachedDrawingInfo = {\n  /** If true, the drawingInfo is captured as part of the binary scene layer representation. */\n  color: boolean;\n};\n/** Spec - https://github.com/Esri/i3s-spec/blob/master/docs/1.8/drawingInfo.cmn.md */\nexport type DrawingInfo = {\n  /** An object defining the symbology for the layer. See more information about supported renderer types in ArcGIS clients. */\n  renderer: any;\n  /** Scale symbols for the layer. */\n  scaleSymbols: boolean;\n};\n/** Spec - https://github.com/Esri/i3s-spec/blob/master/docs/1.8/elevationInfo.cmn.md */\nexport type ElevationInfo = {\n  mode: 'relativeToGround' | 'absoluteHeight' | 'onTheGround' | 'relativeToScene';\n  /** Offset is always added to the result of the above logic except for onTheGround where offset is ignored. */\n  offset: number;\n  /** A string value indicating the unit for the values in elevationInfo */\n  unit: string;\n};\n/** Spec - https://github.com/Esri/i3s-spec/blob/master/docs/1.8/statisticsInfo.cmn.md */\nexport type StatisticsInfo = {\n  /** Key indicating the resource of the statistics. */\n  key: string;\n  /** Name of the field of the statistical information. */\n  name: string;\n  /** The URL to the statistics information. */\n  href: string;\n};\n/** Spec - https://github.com/Esri/i3s-spec/blob/master/docs/1.8/nodePageDefinition.cmn.md */\nexport type NodePageDefinition = {\n  /** Number of nodes per page for this layer. Must be a power-of-two less than 4096 */\n  nodesPerPage: number;\n  /** Index of the root node. Default = 0. */\n  rootIndex?: number;\n  /** Defines the meaning of nodes[].lodThreshold for this layer. */\n  lodSelectionMetricType: 'maxScreenThresholdSQ';\n};\n/** Spec - https://github.com/Esri/i3s-spec/blob/master/docs/1.8/materialDefinitions.cmn.md */\nexport type I3SMaterialDefinition = {\n  /** A set of parameter values that are used to define the metallic-roughness material model from Physically-Based Rendering (PBR) methodology. When not specified, all the default values of pbrMetallicRoughness apply. */\n  pbrMetallicRoughness: I3SPbrMetallicRoughness;\n  /** The normal texture map. */\n  normalTexture?: I3SMaterialTexture;\n  /** The occlusion texture map. */\n  occlusionTexture?: I3SMaterialTexture;\n  /** The emissive texture map. */\n  emissiveTexture?: I3SMaterialTexture;\n  /** The emissive color of the material. */\n  emissiveFactor?: [number, number, number];\n  /** Defines the meaning of the alpha-channel/alpha-mask. */\n  alphaMode: 'opaque' | 'mask' | 'blend';\n  /** The alpha cutoff value of the material. */\n  alphaCutoff?: number;\n  /** Specifies whether the material is double sided. */\n  doubleSided?: boolean;\n  /** Winding order is counterclockwise. */\n  cullFace?: 'none' | 'front' | 'back';\n};\n/** Spec - https://github.com/Esri/i3s-spec/blob/master/docs/1.8/pbrMetallicRoughness.cmn.md */\nexport type I3SPbrMetallicRoughness = {\n  /** The material's base color factor. default=[1,1,1,1] */\n  baseColorFactor?: [number, number, number, number];\n  /** The base color texture. */\n  baseColorTexture?: I3SMaterialTexture;\n  /** the metalness of the material. default=1.0 */\n  metallicFactor: number;\n  /** the roughness of the material. default=1.0 */\n  roughnessFactor: number;\n  /** the metallic-roughness texture. */\n  metallicRoughnessTexture?: I3SMaterialTexture;\n};\n/** Spec - https://github.com/Esri/i3s-spec/blob/master/docs/1.8/materialTexture.cmn.md */\nexport type I3SMaterialTexture = {\n  /** The index in layer.textureSetDefinitions. */\n  textureSetDefinitionId: number;\n  /** The set index of texture's TEXCOORD attribute used for texture coordinate mapping. Default is 0. Deprecated. */\n  texCoord?: number;\n  /** The normal texture: scalar multiplier applied to each normal vector of the normal texture. For occlusion texture,scalar multiplier controlling the amount of occlusion applied. Default=1 */\n  factor?: number;\n};\n/** Spec - https://github.com/Esri/i3s-spec/blob/master/docs/1.8/attributeStorageInfo.cmn.md */\nexport type AttributeStorageInfo = {\n  key: string;\n  name: string;\n  header: {property: string; valueType: string}[];\n  ordering?: string[];\n  attributeValues?: AttributeValue;\n  attributeByteCounts?: AttributeValue;\n  objectIds?: AttributeValue;\n};\n\n/** Spec - https://github.com/Esri/i3s-spec/blob/master/docs/1.8/field.cmn.md */\nexport type Field = {\n  name: string;\n  type: ESRIField;\n  alias?: string;\n  domain?: Domain;\n};\n\nexport type ESRIField =\n  | 'esriFieldTypeDate'\n  | 'esriFieldTypeSingle'\n  | 'esriFieldTypeDouble'\n  | 'esriFieldTypeGUID'\n  | 'esriFieldTypeGlobalID'\n  | 'esriFieldTypeInteger'\n  | 'esriFieldTypeOID'\n  | 'esriFieldTypeSmallInteger'\n  | 'esriFieldTypeString';\n\n/** Spec - https://github.com/Esri/i3s-spec/blob/master/docs/1.8/popupInfo.cmn.md */\nexport type PopupInfo = {\n  title?: string;\n  description?: string;\n  expressionInfos?: any[];\n  fieldInfos?: FieldInfo[];\n  mediaInfos?: any[];\n  popupElements?: {text?: string; type?: string; fieldInfos?: FieldInfo[]}[];\n};\n\n/**\n * Spec - https://github.com/Esri/i3s-spec/blob/master/docs/1.7/3DNodeIndexDocument.cmn.md\n */\nexport type Node3DIndexDocument = {\n  id: string;\n  version?: string;\n  level?: number;\n  mbs?: Mbs;\n  obb?: Obb;\n  lodSelection?: LodSelection[];\n  children?: NodeReference[];\n  neighbors?: NodeReference[];\n  parentNode?: NodeReference;\n  sharedResource?: Resource;\n  featureData?: Resource[];\n  geometryData?: Resource[];\n  textureData?: Resource[];\n  attributeData?: Resource[];\n  created?: string;\n  expires?: string;\n};\n\n/**\n * LOD selection metrics per I3S spec\n * @see https://github.com/Esri/i3s-spec/blob/master/docs/1.7/lodSelection.cmn.md\n */\nexport type LodSelection = {\n  /**  */\n  metricType?: string;\n  maxError: number;\n};\n\n/**\n * Node reference per I3S spec\n * @see https://github.com/Esri/i3s-spec/blob/master/docs/1.7/nodeReference.cmn.md\n */\nexport type NodeReference = {\n  /** Tree Key ID of the referenced node represented as string. */\n  id: string;\n  /** Version (store update session ID) of the referenced node. */\n  version?: string;\n  /** An array of four doubles, corresponding to x, y, z and radius of the minimum bounding sphere of a node. */\n  mbs?: Mbs;\n  /** Describes oriented bounding box. */\n  obb?: Obb;\n  /** Number of values per element. */\n  href?: string;\n  /** Number of features in the referenced node and its descendants, down to the leaf nodes. */\n  featureCount?: number;\n};\n\nexport type Resource = {\n  href: string;\n  layerContent?: string[];\n  featureRange?: number[];\n  multiTextureBundle?: string;\n  vertexElements?: number[];\n  faceElements?: number[];\n  nodePath?: string;\n};\n\nexport type MaxScreenThresholdSQ = {\n  maxError: number;\n};\n\n/** Spec - https://github.com/Esri/i3s-spec/blob/master/docs/1.8/node.cmn.md */\nexport type NodeInPage = {\n  /**\n   * The index in the node array. May be different than material, geometry and attribute resource id. See mesh for more information.\n   */\n  index: number;\n  /**\n   * The index of the parent node in the node array.\n   */\n  parentIndex?: number;\n  /**\n   * When to switch LoD. See https://github.com/Esri/i3s-spec/blob/master/docs/1.8/nodePageDefinition.cmn.md for more information.\n   */\n  lodThreshold?: number;\n  /**\n   * Oriented bounding box for this node.\n   */\n  obb: Obb;\n  /**\n   * index of the children nodes indices.\n   */\n  children?: number[];\n  /**\n   * The mesh for this node. WARNING: only SINGLE mesh is supported at version 1.7 (i.e. length must be 0 or 1).\n   */\n  mesh?: NodeMesh;\n};\n\n/**\n * https://github.com/Esri/i3s-spec/blob/master/docs/1.8/materialDefinitionInfo.cmn.md\n */\nexport type MaterialDefinitionInfo = {\n  /** A name for the material as assigned in the creating application. */\n  name?: string;\n  /** Indicates the material type, chosen from the supported values. */\n  type?: 'standard' | 'water' | 'billboard' | 'leafcard' | 'reference';\n  /