| 1 |
- {"ast":null,"code":"import { Deferred } from \"@babylonjs/core/Misc/deferred.js\";\nimport { Quaternion, Vector3, Matrix, TmpVectors } from \"@babylonjs/core/Maths/math.vector.js\";\nimport { Color3 } from \"@babylonjs/core/Maths/math.color.js\";\nimport { Tools } from \"@babylonjs/core/Misc/tools.js\";\nimport { Camera } from \"@babylonjs/core/Cameras/camera.js\";\nimport { FreeCamera } from \"@babylonjs/core/Cameras/freeCamera.js\";\nimport { AnimationKeyInterpolation } from \"@babylonjs/core/Animations/animationKey.js\";\nimport { AnimationGroup } from \"@babylonjs/core/Animations/animationGroup.js\";\nimport { Bone } from \"@babylonjs/core/Bones/bone.js\";\nimport { Skeleton } from \"@babylonjs/core/Bones/skeleton.js\";\nimport { Material } from \"@babylonjs/core/Materials/material.js\";\nimport { PBRMaterial } from \"@babylonjs/core/Materials/PBR/pbrMaterial.js\";\nimport { Texture } from \"@babylonjs/core/Materials/Textures/texture.js\";\nimport { TransformNode } from \"@babylonjs/core/Meshes/transformNode.js\";\nimport { Buffer, VertexBuffer } from \"@babylonjs/core/Buffers/buffer.js\";\nimport { Geometry } from \"@babylonjs/core/Meshes/geometry.js\";\nimport { AbstractMesh } from \"@babylonjs/core/Meshes/abstractMesh.js\";\nimport { Mesh } from \"@babylonjs/core/Meshes/mesh.js\";\nimport { MorphTarget } from \"@babylonjs/core/Morph/morphTarget.js\";\nimport { MorphTargetManager } from \"@babylonjs/core/Morph/morphTargetManager.js\";\nimport { GLTFFileLoader, GLTFLoaderState, GLTFLoaderCoordinateSystemMode, GLTFLoaderAnimationStartMode } from \"../glTFFileLoader.js\";\nimport { DecodeBase64UrlToBinary, IsBase64DataUrl, LoadFileError } from \"@babylonjs/core/Misc/fileTools.js\";\nimport { Logger } from \"@babylonjs/core/Misc/logger.js\";\nimport { BoundingInfo } from \"@babylonjs/core/Culling/boundingInfo.js\";\nimport { nodeAnimationData } from \"./glTFLoaderAnimation.js\";\n// https://stackoverflow.com/a/48218209\nfunction mergeDeep(...objects) {\n const isObject = obj => obj && typeof obj === \"object\";\n return objects.reduce((prev, obj) => {\n Object.keys(obj).forEach(key => {\n const pVal = prev[key];\n const oVal = obj[key];\n if (Array.isArray(pVal) && Array.isArray(oVal)) {\n prev[key] = pVal.concat(...oVal);\n } else if (isObject(pVal) && isObject(oVal)) {\n prev[key] = mergeDeep(pVal, oVal);\n } else {\n prev[key] = oVal;\n }\n });\n return prev;\n }, {});\n}\n/**\n * Helper class for working with arrays when loading the glTF asset\n */\nexport class ArrayItem {\n /**\n * Gets an item from the given array.\n * @param context The context when loading the asset\n * @param array The array to get the item from\n * @param index The index to the array\n * @returns The array item\n */\n static Get(context, array, index) {\n if (!array || index == undefined || !array[index]) {\n throw new Error(`${context}: Failed to find index (${index})`);\n }\n return array[index];\n }\n /**\n * Gets an item from the given array or returns null if not available.\n * @param array The array to get the item from\n * @param index The index to the array\n * @returns The array item or null\n */\n static TryGet(array, index) {\n if (!array || index == undefined || !array[index]) {\n return null;\n }\n return array[index];\n }\n /**\n * Assign an `index` field to each item of the given array.\n * @param array The array of items\n */\n static Assign(array) {\n if (array) {\n for (let index = 0; index < array.length; index++) {\n array[index].index = index;\n }\n }\n }\n}\n/**\n * The glTF 2.0 loader\n */\nexport class GLTFLoader {\n /**\n * Registers a loader extension.\n * @param name The name of the loader extension.\n * @param factory The factory function that creates the loader extension.\n */\n static RegisterExtension(name, factory) {\n if (GLTFLoader.UnregisterExtension(name)) {\n Logger.Warn(`Extension with the name '${name}' already exists`);\n }\n GLTFLoader._RegisteredExtensions[name] = {\n factory: factory\n };\n }\n /**\n * Unregisters a loader extension.\n * @param name The name of the loader extension.\n * @returns A boolean indicating whether the extension has been unregistered\n */\n static UnregisterExtension(name) {\n if (!GLTFLoader._RegisteredExtensions[name]) {\n return false;\n }\n delete GLTFLoader._RegisteredExtensions[name];\n return true;\n }\n /**\n * The object that represents the glTF JSON.\n */\n get gltf() {\n if (!this._gltf) {\n throw new Error(\"glTF JSON is not available\");\n }\n return this._gltf;\n }\n /**\n * The BIN chunk of a binary glTF.\n */\n get bin() {\n return this._bin;\n }\n /**\n * The parent file loader.\n */\n get parent() {\n return this._parent;\n }\n /**\n * The Babylon scene when loading the asset.\n */\n get babylonScene() {\n if (!this._babylonScene) {\n throw new Error(\"Scene is not available\");\n }\n return this._babylonScene;\n }\n /**\n * The root Babylon node when loading the asset.\n */\n get rootBabylonMesh() {\n return this._rootBabylonMesh;\n }\n /**\n * The root url when loading the asset.\n */\n get rootUrl() {\n return this._rootUrl;\n }\n /**\n * @internal\n */\n constructor(parent) {\n /** @internal */\n this._completePromises = new Array();\n /** @internal */\n this._assetContainer = null;\n /** Storage */\n this._babylonLights = [];\n /** @internal */\n this._disableInstancedMesh = 0;\n /** @internal */\n this._allMaterialsDirtyRequired = false;\n this._extensions = new Array();\n this._disposed = false;\n this._rootUrl = null;\n this._fileName = null;\n this._uniqueRootUrl = null;\n this._bin = null;\n this._rootBabylonMesh = null;\n this._defaultBabylonMaterialData = {};\n this._postSceneLoadActions = new Array();\n this._parent = parent;\n }\n /** @internal */\n dispose() {\n if (this._disposed) {\n return;\n }\n this._disposed = true;\n this._completePromises.length = 0;\n this._extensions.forEach(extension => extension.dispose && extension.dispose());\n this._extensions.length = 0;\n this._gltf = null; // TODO\n this._bin = null;\n this._babylonScene = null; // TODO\n this._rootBabylonMesh = null;\n this._defaultBabylonMaterialData = {};\n this._postSceneLoadActions.length = 0;\n this._parent.dispose();\n }\n /**\n * @internal\n */\n importMeshAsync(meshesNames, scene, container, data, rootUrl, onProgress, fileName = \"\") {\n return Promise.resolve().then(() => {\n this._babylonScene = scene;\n this._assetContainer = container;\n this._loadData(data);\n let nodes = null;\n if (meshesNames) {\n const nodeMap = {};\n if (this._gltf.nodes) {\n for (const node of this._gltf.nodes) {\n if (node.name) {\n nodeMap[node.name] = node.index;\n }\n }\n }\n const names = meshesNames instanceof Array ? meshesNames : [meshesNames];\n nodes = names.map(name => {\n const node = nodeMap[name];\n if (node === undefined) {\n throw new Error(`Failed to find node '${name}'`);\n }\n return node;\n });\n }\n return this._loadAsync(rootUrl, fileName, nodes, () => {\n return {\n meshes: this._getMeshes(),\n particleSystems: [],\n skeletons: this._getSkeletons(),\n animationGroups: this._getAnimationGroups(),\n lights: this._babylonLights,\n transformNodes: this._getTransformNodes(),\n geometries: this._getGeometries(),\n spriteManagers: []\n };\n });\n });\n }\n /**\n * @internal\n */\n loadAsync(scene, data, rootUrl, onProgress, fileName = \"\") {\n return Promise.resolve().then(() => {\n this._babylonScene = scene;\n this._loadData(data);\n return this._loadAsync(rootUrl, fileName, null, () => undefined);\n });\n }\n _loadAsync(rootUrl, fileName, nodes, resultFunc) {\n return Promise.resolve().then(() => {\n this._rootUrl = rootUrl;\n this._uniqueRootUrl = !rootUrl.startsWith(\"file:\") && fileName ? rootUrl : `${rootUrl}${Date.now()}/`;\n this._fileName = fileName;\n this._allMaterialsDirtyRequired = false;\n this._loadExtensions();\n this._checkExtensions();\n const loadingToReadyCounterName = `${GLTFLoaderState[GLTFLoaderState.LOADING]} => ${GLTFLoaderState[GLTFLoaderState.READY]}`;\n const loadingToCompleteCounterName = `${GLTFLoaderState[GLTFLoaderState.LOADING]} => ${GLTFLoaderState[GLTFLoaderState.COMPLETE]}`;\n this._parent._startPerformanceCounter(loadingToReadyCounterName);\n this._parent._startPerformanceCounter(loadingToCompleteCounterName);\n this._parent._setState(GLTFLoaderState.LOADING);\n this._extensionsOnLoading();\n const promises = new Array();\n // Block the marking of materials dirty until the scene is loaded.\n const oldBlockMaterialDirtyMechanism = this._babylonScene.blockMaterialDirtyMechanism;\n this._babylonScene.blockMaterialDirtyMechanism = true;\n if (!this.parent.loadOnlyMaterials) {\n if (nodes) {\n promises.push(this.loadSceneAsync(\"/nodes\", {\n nodes: nodes,\n index: -1\n }));\n } else if (this._gltf.scene != undefined || this._gltf.scenes && this._gltf.scenes[0]) {\n const scene = ArrayItem.Get(`/scene`, this._gltf.scenes, this._gltf.scene || 0);\n promises.push(this.loadSceneAsync(`/scenes/${scene.index}`, scene));\n }\n }\n if (!this.parent.skipMaterials && this.parent.loadAllMaterials && this._gltf.materials) {\n for (let m = 0; m < this._gltf.materials.length; ++m) {\n const material = this._gltf.materials[m];\n const context = \"/materials/\" + m;\n const babylonDrawMode = Material.TriangleFillMode;\n promises.push(this._loadMaterialAsync(context, material, null, babylonDrawMode, () => {}));\n }\n }\n // Restore the blocking of material dirty.\n if (this._allMaterialsDirtyRequired) {\n // This can happen if we add a light for instance as it will impact the whole scene.\n // This automatically resets everything if needed.\n this._babylonScene.blockMaterialDirtyMechanism = oldBlockMaterialDirtyMechanism;\n } else {\n // By default a newly created material is dirty so there is no need to flag the full scene as dirty.\n // For perf reasons, we then bypass blockMaterialDirtyMechanism as this would \"dirty\" the entire scene.\n this._babylonScene._forceBlockMaterialDirtyMechanism(oldBlockMaterialDirtyMechanism);\n }\n if (this._parent.compileMaterials) {\n promises.push(this._compileMaterialsAsync());\n }\n if (this._parent.compileShadowGenerators) {\n promises.push(this._compileShadowGeneratorsAsync());\n }\n const resultPromise = Promise.all(promises).then(() => {\n if (this._rootBabylonMesh && this._rootBabylonMesh !== this._parent.customRootNode) {\n this._rootBabylonMesh.setEnabled(true);\n }\n this._extensionsOnReady();\n this._parent._setState(GLTFLoaderState.READY);\n this._startAnimations();\n return resultFunc();\n });\n return resultPromise.then(result => {\n this._parent._endPerformanceCounter(loadingToReadyCounterName);\n Tools.SetImmediate(() => {\n if (!this._disposed) {\n Promise.all(this._completePromises).then(() => {\n this._parent._endPerformanceCounter(loadingToCompleteCounterName);\n this._parent._setState(GLTFLoaderState.COMPLETE);\n this._parent.onCompleteObservable.notifyObservers(undefined);\n this._parent.onCompleteObservable.clear();\n this.dispose();\n }, error => {\n this._parent.onErrorObservable.notifyObservers(error);\n this._parent.onErrorObservable.clear();\n this.dispose();\n });\n }\n });\n return result;\n });\n }).catch(error => {\n if (!this._disposed) {\n this._parent.onErrorObservable.notifyObservers(error);\n this._parent.onErrorObservable.clear();\n this.dispose();\n }\n throw error;\n });\n }\n _loadData(data) {\n this._gltf = data.json;\n this._setupData();\n if (data.bin) {\n const buffers = this._gltf.buffers;\n if (buffers && buffers[0] && !buffers[0].uri) {\n const binaryBuffer = buffers[0];\n if (binaryBuffer.byteLength < data.bin.byteLength - 3 || binaryBuffer.byteLength > data.bin.byteLength) {\n Logger.Warn(`Binary buffer length (${binaryBuffer.byteLength}) from JSON does not match chunk length (${data.bin.byteLength})`);\n }\n this._bin = data.bin;\n } else {\n Logger.Warn(\"Unexpected BIN chunk\");\n }\n }\n }\n _setupData() {\n ArrayItem.Assign(this._gltf.accessors);\n ArrayItem.Assign(this._gltf.animations);\n ArrayItem.Assign(this._gltf.buffers);\n ArrayItem.Assign(this._gltf.bufferViews);\n ArrayItem.Assign(this._gltf.cameras);\n ArrayItem.Assign(this._gltf.images);\n ArrayItem.Assign(this._gltf.materials);\n ArrayItem.Assign(this._gltf.meshes);\n ArrayItem.Assign(this._gltf.nodes);\n ArrayItem.Assign(this._gltf.samplers);\n ArrayItem.Assign(this._gltf.scenes);\n ArrayItem.Assign(this._gltf.skins);\n ArrayItem.Assign(this._gltf.textures);\n if (this._gltf.nodes) {\n const nodeParents = {};\n for (const node of this._gltf.nodes) {\n if (node.children) {\n for (const index of node.children) {\n nodeParents[index] = node.index;\n }\n }\n }\n const rootNode = this._createRootNode();\n for (const node of this._gltf.nodes) {\n const parentIndex = nodeParents[node.index];\n node.parent = parentIndex === undefined ? rootNode : this._gltf.nodes[parentIndex];\n }\n }\n }\n _loadExtensions() {\n for (const name in GLTFLoader._RegisteredExtensions) {\n const extension = GLTFLoader._RegisteredExtensions[name].factory(this);\n if (extension.name !== name) {\n Logger.Warn(`The name of the glTF loader extension instance does not match the registered name: ${extension.name} !== ${name}`);\n }\n this._extensions.push(extension);\n this._parent.onExtensionLoadedObservable.notifyObservers(extension);\n }\n this._extensions.sort((a, b) => (a.order || Number.MAX_VALUE) - (b.order || Number.MAX_VALUE));\n this._parent.onExtensionLoadedObservable.clear();\n }\n _checkExtensions() {\n if (this._gltf.extensionsRequired) {\n for (const name of this._gltf.extensionsRequired) {\n const available = this._extensions.some(extension => extension.name === name && extension.enabled);\n if (!available) {\n throw new Error(`Required extension ${name} is not available`);\n }\n }\n }\n }\n _createRootNode() {\n if (this._parent.customRootNode !== undefined) {\n this._rootBabylonMesh = this._parent.customRootNode;\n return {\n // eslint-disable-next-line @typescript-eslint/naming-convention\n _babylonTransformNode: this._rootBabylonMesh === null ? undefined : this._rootBabylonMesh,\n index: -1\n };\n }\n this._babylonScene._blockEntityCollection = !!this._assetContainer;\n const rootMesh = new Mesh(\"__root__\", this._babylonScene);\n this._rootBabylonMesh = rootMesh;\n this._rootBabylonMesh._parentContainer = this._assetContainer;\n this._babylonScene._blockEntityCollection = false;\n this._rootBabylonMesh.setEnabled(false);\n const rootNode = {\n // eslint-disable-next-line @typescript-eslint/naming-convention\n _babylonTransformNode: this._rootBabylonMesh,\n index: -1\n };\n switch (this._parent.coordinateSystemMode) {\n case GLTFLoaderCoordinateSystemMode.AUTO:\n {\n if (!this._babylonScene.useRightHandedSystem) {\n rootNode.rotation = [0, 1, 0, 0];\n rootNode.scale = [1, 1, -1];\n GLTFLoader._LoadTransform(rootNode, this._rootBabylonMesh);\n }\n break;\n }\n case GLTFLoaderCoordinateSystemMode.FORCE_RIGHT_HANDED:\n {\n this._babylonScene.useRightHandedSystem = true;\n break;\n }\n default:\n {\n throw new Error(`Invalid coordinate system mode (${this._parent.coordinateSystemMode})`);\n }\n }\n this._parent.onMeshLoadedObservable.notifyObservers(rootMesh);\n return rootNode;\n }\n /**\n * Loads a glTF scene.\n * @param context The context when loading the asset\n * @param scene The glTF scene property\n * @returns A promise that resolves when the load is complete\n */\n loadSceneAsync(context, scene) {\n const extensionPromise = this._extensionsLoadSceneAsync(context, scene);\n if (extensionPromise) {\n return extensionPromise;\n }\n const promises = new Array();\n this.logOpen(`${context} ${scene.name || \"\"}`);\n if (scene.nodes) {\n for (const index of scene.nodes) {\n const node = ArrayItem.Get(`${context}/nodes/${index}`, this._gltf.nodes, index);\n promises.push(this.loadNodeAsync(`/nodes/${node.index}`, node, babylonMesh => {\n babylonMesh.parent = this._rootBabylonMesh;\n }));\n }\n }\n for (const action of this._postSceneLoadActions) {\n action();\n }\n promises.push(this._loadAnimationsAsync());\n this.logClose();\n return Promise.all(promises).then(() => {});\n }\n _forEachPrimitive(node, callback) {\n if (node._primitiveBabylonMeshes) {\n for (const babylonMesh of node._primitiveBabylonMeshes) {\n callback(babylonMesh);\n }\n }\n }\n _getGeometries() {\n const geometries = [];\n const nodes = this._gltf.nodes;\n if (nodes) {\n for (const node of nodes) {\n this._forEachPrimitive(node, babylonMesh => {\n const geometry = babylonMesh.geometry;\n if (geometry && geometries.indexOf(geometry) === -1) {\n geometries.push(geometry);\n }\n });\n }\n }\n return geometries;\n }\n _getMeshes() {\n const meshes = [];\n // Root mesh is always first, if available.\n if (this._rootBabylonMesh instanceof AbstractMesh) {\n meshes.push(this._rootBabylonMesh);\n }\n const nodes = this._gltf.nodes;\n if (nodes) {\n for (const node of nodes) {\n this._forEachPrimitive(node, babylonMesh => {\n meshes.push(babylonMesh);\n });\n }\n }\n return meshes;\n }\n _getTransformNodes() {\n const transformNodes = [];\n const nodes = this._gltf.nodes;\n if (nodes) {\n for (const node of nodes) {\n if (node._babylonTransformNode && node._babylonTransformNode.getClassName() === \"TransformNode\") {\n transformNodes.push(node._babylonTransformNode);\n }\n if (node._babylonTransformNodeForSkin) {\n transformNodes.push(node._babylonTransformNodeForSkin);\n }\n }\n }\n return transformNodes;\n }\n _getSkeletons() {\n const skeletons = [];\n const skins = this._gltf.skins;\n if (skins) {\n for (const skin of skins) {\n if (skin._data) {\n skeletons.push(skin._data.babylonSkeleton);\n }\n }\n }\n return skeletons;\n }\n _getAnimationGroups() {\n const animationGroups = [];\n const animations = this._gltf.animations;\n if (animations) {\n for (const animation of animations) {\n if (animation._babylonAnimationGroup) {\n animationGroups.push(animation._babylonAnimationGroup);\n }\n }\n }\n return animationGroups;\n }\n _startAnimations() {\n switch (this._parent.animationStartMode) {\n case GLTFLoaderAnimationStartMode.NONE:\n {\n // do nothing\n break;\n }\n case GLTFLoaderAnimationStartMode.FIRST:\n {\n const babylonAnimationGroups = this._getAnimationGroups();\n if (babylonAnimationGroups.length !== 0) {\n babylonAnimationGroups[0].start(true);\n }\n break;\n }\n case GLTFLoaderAnimationStartMode.ALL:\n {\n const babylonAnimationGroups = this._getAnimationGroups();\n for (const babylonAnimationGroup of babylonAnimationGroups) {\n babylonAnimationGroup.start(true);\n }\n break;\n }\n default:\n {\n Logger.Error(`Invalid animation start mode (${this._parent.animationStartMode})`);\n return;\n }\n }\n }\n /**\n * Loads a glTF node.\n * @param context The context when loading the asset\n * @param node The glTF node property\n * @param assign A function called synchronously after parsing the glTF properties\n * @returns A promise that resolves with the loaded Babylon mesh when the load is complete\n */\n loadNodeAsync(context, node, assign = () => {}) {\n const extensionPromise = this._extensionsLoadNodeAsync(context, node, assign);\n if (extensionPromise) {\n return extensionPromise;\n }\n if (node._babylonTransformNode) {\n throw new Error(`${context}: Invalid recursive node hierarchy`);\n }\n const promises = new Array();\n this.logOpen(`${context} ${node.name || \"\"}`);\n const loadNode = babylonTransformNode => {\n GLTFLoader.AddPointerMetadata(babylonTransformNode, context);\n GLTFLoader._LoadTransform(node, babylonTransformNode);\n if (node.camera != undefined) {\n const camera = ArrayItem.Get(`${context}/camera`, this._gltf.cameras, node.camera);\n promises.push(this.loadCameraAsync(`/cameras/${camera.index}`, camera, babylonCamera => {\n babylonCamera.parent = babylonTransformNode;\n }));\n }\n if (node.children) {\n for (const index of node.children) {\n const childNode = ArrayItem.Get(`${context}/children/${index}`, this._gltf.nodes, index);\n promises.push(this.loadNodeAsync(`/nodes/${childNode.index}`, childNode, childBabylonMesh => {\n childBabylonMesh.parent = babylonTransformNode;\n }));\n }\n }\n assign(babylonTransformNode);\n };\n if (node.mesh == undefined || node.skin != undefined) {\n const nodeName = node.name || `node${node.index}`;\n this._babylonScene._blockEntityCollection = !!this._assetContainer;\n const transformNode = new TransformNode(nodeName, this._babylonScene);\n transformNode._parentContainer = this._assetContainer;\n this._babylonScene._blockEntityCollection = false;\n if (node.mesh == undefined) {\n node._babylonTransformNode = transformNode;\n } else {\n node._babylonTransformNodeForSkin = transformNode;\n }\n loadNode(transformNode);\n }\n if (node.mesh != undefined) {\n if (node.skin == undefined) {\n const mesh = ArrayItem.Get(`${context}/mesh`, this._gltf.meshes, node.mesh);\n promises.push(this._loadMeshAsync(`/meshes/${mesh.index}`, node, mesh, loadNode));\n } else {\n // See https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#skins (second implementation note)\n // This code path will place the skinned mesh as a sibling of the skeleton root node without loading the\n // transform, which effectively ignores the transform of the skinned mesh, as per spec.\n const mesh = ArrayItem.Get(`${context}/mesh`, this._gltf.meshes, node.mesh);\n promises.push(this._loadMeshAsync(`/meshes/${mesh.index}`, node, mesh, babylonTransformNode => {\n const babylonTransformNodeForSkin = node._babylonTransformNodeForSkin;\n // Merge the metadata from the skin node to the skinned mesh in case a loader extension added metadata.\n babylonTransformNode.metadata = mergeDeep(babylonTransformNodeForSkin.metadata, babylonTransformNode.metadata || {});\n const skin = ArrayItem.Get(`${context}/skin`, this._gltf.skins, node.skin);\n promises.push(this._loadSkinAsync(`/skins/${skin.index}`, node, skin, babylonSkeleton => {\n this._forEachPrimitive(node, babylonMesh => {\n babylonMesh.skeleton = babylonSkeleton;\n });\n // Wait until all the nodes are parented before parenting the skinned mesh.\n this._postSceneLoadActions.push(() => {\n if (skin.skeleton != undefined) {\n // Place the skinned mesh node as a sibling of the skeleton root node.\n // Handle special case when the parent of the skeleton root is the skinned mesh.\n const parentNode = ArrayItem.Get(`/skins/${skin.index}/skeleton`, this._gltf.nodes, skin.skeleton).parent;\n if (node.index === parentNode.index) {\n babylonTransformNode.parent = babylonTransformNodeForSkin.parent;\n } else {\n babylonTransformNode.parent = parentNode._babylonTransformNode;\n }\n } else {\n babylonTransformNode.parent = this._rootBabylonMesh;\n }\n this._parent.onSkinLoadedObservable.notifyObservers({\n node: babylonTransformNodeForSkin,\n skinnedNode: babylonTransformNode\n });\n });\n }));\n }));\n }\n }\n this.logClose();\n return Promise.all(promises).then(() => {\n this._forEachPrimitive(node, babylonMesh => {\n if (babylonMesh.geometry && babylonMesh.geometry.useBoundingInfoFromGeometry) {\n // simply apply the world matrices to the bounding info - the extends are already ok\n babylonMesh._updateBoundingInfo();\n } else {\n babylonMesh.refreshBoundingInfo(true, true);\n }\n });\n return node._babylonTransformNode;\n });\n }\n _loadMeshAsync(context, node, mesh, assign) {\n const primitives = mesh.primitives;\n if (!primitives || !primitives.length) {\n throw new Error(`${context}: Primitives are missing`);\n }\n if (primitives[0].index == undefined) {\n ArrayItem.Assign(primitives);\n }\n const promises = new Array();\n this.logOpen(`${context} ${mesh.name || \"\"}`);\n const name = node.name || `node${node.index}`;\n if (primitives.length === 1) {\n const primitive = mesh.primitives[0];\n promises.push(this._loadMeshPrimitiveAsync(`${context}/primitives/${primitive.index}`, name, node, mesh, primitive, babylonMesh => {\n node._babylonTransformNode = babylonMesh;\n node._primitiveBabylonMeshes = [babylonMesh];\n }));\n } else {\n this._babylonScene._blockEntityCollection = !!this._assetContainer;\n node._babylonTransformNode = new TransformNode(name, this._babylonScene);\n node._babylonTransformNode._parentContainer = this._assetContainer;\n this._babylonScene._blockEntityCollection = false;\n node._primitiveBabylonMeshes = [];\n for (const primitive of primitives) {\n promises.push(this._loadMeshPrimitiveAsync(`${context}/primitives/${primitive.index}`, `${name}_primitive${primitive.index}`, node, mesh, primitive, babylonMesh => {\n babylonMesh.parent = node._babylonTransformNode;\n node._primitiveBabylonMeshes.push(babylonMesh);\n }));\n }\n }\n assign(node._babylonTransformNode);\n this.logClose();\n return Promise.all(promises).then(() => {\n return node._babylonTransformNode;\n });\n }\n /**\n * @internal Define this method to modify the default behavior when loading data for mesh primitives.\n * @param context The context when loading the asset\n * @param name The mesh name when loading the asset\n * @param node The glTF node when loading the asset\n * @param mesh The glTF mesh when loading the asset\n * @param primitive The glTF mesh primitive property\n * @param assign A function called synchronously after parsing the glTF properties\n * @returns A promise that resolves with the loaded mesh when the load is complete or null if not handled\n */\n _loadMeshPrimitiveAsync(context, name, node, mesh, primitive, assign) {\n const extensionPromise = this._extensionsLoadMeshPrimitiveAsync(context, name, node, mesh, primitive, assign);\n if (extensionPromise) {\n return extensionPromise;\n }\n this.logOpen(`${context}`);\n const shouldInstance = this._disableInstancedMesh === 0 && this._parent.createInstances && node.skin == undefined && !mesh.primitives[0].targets;\n let babylonAbstractMesh;\n let promise;\n if (shouldInstance && primitive._instanceData) {\n this._babylonScene._blockEntityCollection = !!this._assetContainer;\n babylonAbstractMesh = primitive._instanceData.babylonSourceMesh.createInstance(name);\n babylonAbstractMesh._parentContainer = this._assetContainer;\n this._babylonScene._blockEntityCollection = false;\n promise = primitive._instanceData.promise;\n } else {\n const promises = new Array();\n this._babylonScene._blockEntityCollection = !!this._assetContainer;\n const babylonMesh = new Mesh(name, this._babylonScene);\n babylonMesh._parentContainer = this._assetContainer;\n this._babylonScene._blockEntityCollection = false;\n babylonMesh.overrideMaterialSideOrientation = this._babylonScene.useRightHandedSystem ? Material.CounterClockWiseSideOrientation : Material.ClockWiseSideOrientation;\n this._createMorphTargets(context, node, mesh, primitive, babylonMesh);\n promises.push(this._loadVertexDataAsync(context, primitive, babylonMesh).then(babylonGeometry => {\n return this._loadMorphTargetsAsync(context, primitive, babylonMesh, babylonGeometry).then(() => {\n if (this._disposed) {\n return;\n }\n this._babylonScene._blockEntityCollection = !!this._assetContainer;\n babylonGeometry.applyToMesh(babylonMesh);\n babylonGeometry._parentContainer = this._assetContainer;\n this._babylonScene._blockEntityCollection = false;\n });\n }));\n const babylonDrawMode = GLTFLoader._GetDrawMode(context, primitive.mode);\n if (primitive.material == undefined) {\n let babylonMaterial = this._defaultBabylonMaterialData[babylonDrawMode];\n if (!babylonMaterial) {\n babylonMaterial = this._createDefaultMaterial(\"__GLTFLoader._default\", babylonDrawMode);\n this._parent.onMaterialLoadedObservable.notifyObservers(babylonMaterial);\n this._defaultBabylonMaterialData[babylonDrawMode] = babylonMaterial;\n }\n babylonMesh.material = babylonMaterial;\n } else if (!this.parent.skipMaterials) {\n const material = ArrayItem.Get(`${context}/material`, this._gltf.materials, primitive.material);\n promises.push(this._loadMaterialAsync(`/materials/${material.index}`, material, babylonMesh, babylonDrawMode, babylonMaterial => {\n babylonMesh.material = babylonMaterial;\n }));\n }\n promise = Promise.all(promises);\n if (shouldInstance) {\n primitive._instanceData = {\n babylonSourceMesh: babylonMesh,\n promise: promise\n };\n }\n babylonAbstractMesh = babylonMesh;\n }\n GLTFLoader.AddPointerMetadata(babylonAbstractMesh, context);\n this._parent.onMeshLoadedObservable.notifyObservers(babylonAbstractMesh);\n assign(babylonAbstractMesh);\n this.logClose();\n return promise.then(() => {\n return babylonAbstractMesh;\n });\n }\n _loadVertexDataAsync(context, primitive, babylonMesh) {\n const extensionPromise = this._extensionsLoadVertexDataAsync(context, primitive, babylonMesh);\n if (extensionPromise) {\n return extensionPromise;\n }\n const attributes = primitive.attributes;\n if (!attributes) {\n throw new Error(`${context}: Attributes are missing`);\n }\n const promises = new Array();\n const babylonGeometry = new Geometry(babylonMesh.name, this._babylonScene);\n if (primitive.indices == undefined) {\n babylonMesh.isUnIndexed = true;\n } else {\n const accessor = ArrayItem.Get(`${context}/indices`, this._gltf.accessors, primitive.indices);\n promises.push(this._loadIndicesAccessorAsync(`/accessors/${accessor.index}`, accessor).then(data => {\n babylonGeometry.setIndices(data);\n }));\n }\n const loadAttribute = (name, kind, callback) => {\n if (attributes[name] == undefined) {\n return;\n }\n babylonMesh._delayInfo = babylonMesh._delayInfo || [];\n if (babylonMesh._delayInfo.indexOf(kind) === -1) {\n babylonMesh._delayInfo.push(kind);\n }\n const accessor = ArrayItem.Get(`${context}/attributes/${name}`, this._gltf.accessors, attributes[name]);\n promises.push(this._loadVertexAccessorAsync(`/accessors/${accessor.index}`, accessor, kind).then(babylonVertexBuffer => {\n if (babylonVertexBuffer.getKind() === VertexBuffer.PositionKind && !this.parent.alwaysComputeBoundingBox && !babylonMesh.skeleton) {\n if (accessor.min && accessor.max) {\n const min = TmpVectors.Vector3[0].copyFromFloats(...accessor.min);\n const max = TmpVectors.Vector3[1].copyFromFloats(...accessor.max);\n if (accessor.normalized && accessor.componentType !== 5126 /* AccessorComponentType.FLOAT */) {\n let divider = 1;\n switch (accessor.componentType) {\n case 5120 /* AccessorComponentType.BYTE */:\n divider = 127.0;\n break;\n case 5121 /* AccessorComponentType.UNSIGNED_BYTE */:\n divider = 255.0;\n break;\n case 5122 /* AccessorComponentType.SHORT */:\n divider = 32767.0;\n break;\n case 5123 /* AccessorComponentType.UNSIGNED_SHORT */:\n divider = 65535.0;\n break;\n }\n const oneOverDivider = 1 / divider;\n min.scaleInPlace(oneOverDivider);\n max.scaleInPlace(oneOverDivider);\n }\n babylonGeometry._boundingInfo = new BoundingInfo(min, max);\n babylonGeometry.useBoundingInfoFromGeometry = true;\n }\n }\n babylonGeometry.setVerticesBuffer(babylonVertexBuffer, accessor.count);\n }));\n if (kind == VertexBuffer.MatricesIndicesExtraKind) {\n babylonMesh.numBoneInfluencers = 8;\n }\n if (callback) {\n callback(accessor);\n }\n };\n loadAttribute(\"POSITION\", VertexBuffer.PositionKind);\n loadAttribute(\"NORMAL\", VertexBuffer.NormalKind);\n loadAttribute(\"TANGENT\", VertexBuffer.TangentKind);\n loadAttribute(\"TEXCOORD_0\", VertexBuffer.UVKind);\n loadAttribute(\"TEXCOORD_1\", VertexBuffer.UV2Kind);\n loadAttribute(\"TEXCOORD_2\", VertexBuffer.UV3Kind);\n loadAttribute(\"TEXCOORD_3\", VertexBuffer.UV4Kind);\n loadAttribute(\"TEXCOORD_4\", VertexBuffer.UV5Kind);\n loadAttribute(\"TEXCOORD_5\", VertexBuffer.UV6Kind);\n loadAttribute(\"JOINTS_0\", VertexBuffer.MatricesIndicesKind);\n loadAttribute(\"WEIGHTS_0\", VertexBuffer.MatricesWeightsKind);\n loadAttribute(\"JOINTS_1\", VertexBuffer.MatricesIndicesExtraKind);\n loadAttribute(\"WEIGHTS_1\", VertexBuffer.MatricesWeightsExtraKind);\n loadAttribute(\"COLOR_0\", VertexBuffer.ColorKind, accessor => {\n if (accessor.type === \"VEC4\" /* AccessorType.VEC4 */) {\n babylonMesh.hasVertexAlpha = true;\n }\n });\n return Promise.all(promises).then(() => {\n return babylonGeometry;\n });\n }\n _createMorphTargets(context, node, mesh, primitive, babylonMesh) {\n if (!primitive.targets) {\n return;\n }\n if (node._numMorphTargets == undefined) {\n node._numMorphTargets = primitive.targets.length;\n } else if (primitive.targets.length !== node._numMorphTargets) {\n throw new Error(`${context}: Primitives do not have the same number of targets`);\n }\n const targetNames = mesh.extras ? mesh.extras.targetNames : null;\n this._babylonScene._blockEntityCollection = !!this._assetContainer;\n babylonMesh.morphTargetManager = new MorphTargetManager(this._babylonScene);\n babylonMesh.morphTargetManager._parentContainer = this._assetContainer;\n this._babylonScene._blockEntityCollection = false;\n babylonMesh.morphTargetManager.areUpdatesFrozen = true;\n for (let index = 0; index < primitive.targets.length; index++) {\n const weight = node.weights ? node.weights[index] : mesh.weights ? mesh.weights[index] : 0;\n const name = targetNames ? targetNames[index] : `morphTarget${index}`;\n babylonMesh.morphTargetManager.addTarget(new MorphTarget(name, weight, babylonMesh.getScene()));\n // TODO: tell the target whether it has positions, normals, tangents\n }\n }\n _loadMorphTargetsAsync(context, primitive, babylonMesh, babylonGeometry) {\n if (!primitive.targets) {\n return Promise.resolve();\n }\n const promises = new Array();\n const morphTargetManager = babylonMesh.morphTargetManager;\n for (let index = 0; index < morphTargetManager.numTargets; index++) {\n const babylonMorphTarget = morphTargetManager.getTarget(index);\n promises.push(this._loadMorphTargetVertexDataAsync(`${context}/targets/${index}`, babylonGeometry, primitive.targets[index], babylonMorphTarget));\n }\n return Promise.all(promises).then(() => {\n morphTargetManager.areUpdatesFrozen = false;\n });\n }\n _loadMorphTargetVertexDataAsync(context, babylonGeometry, attributes, babylonMorphTarget) {\n const promises = new Array();\n const loadAttribute = (attribute, kind, setData) => {\n if (attributes[attribute] == undefined) {\n return;\n }\n const babylonVertexBuffer = babylonGeometry.getVertexBuffer(kind);\n if (!babylonVertexBuffer) {\n return;\n }\n const accessor = ArrayItem.Get(`${context}/${attribute}`, this._gltf.accessors, attributes[attribute]);\n promises.push(this._loadFloatAccessorAsync(`/accessors/${accessor.index}`, accessor).then(data => {\n setData(babylonVertexBuffer, data);\n }));\n };\n loadAttribute(\"POSITION\", VertexBuffer.PositionKind, (babylonVertexBuffer, data) => {\n const positions = new Float32Array(data.length);\n babylonVertexBuffer.forEach(data.length, (value, index) => {\n positions[index] = data[index] + value;\n });\n babylonMorphTarget.setPositions(positions);\n });\n loadAttribute(\"NORMAL\", VertexBuffer.NormalKind, (babylonVertexBuffer, data) => {\n const normals = new Float32Array(data.length);\n babylonVertexBuffer.forEach(normals.length, (value, index) => {\n normals[index] = data[index] + value;\n });\n babylonMorphTarget.setNormals(normals);\n });\n loadAttribute(\"TANGENT\", VertexBuffer.TangentKind, (babylonVertexBuffer, data) => {\n const tangents = new Float32Array(data.length / 3 * 4);\n let dataIndex = 0;\n babylonVertexBuffer.forEach(data.length / 3 * 4, (value, index) => {\n // Tangent data for morph targets is stored as xyz delta.\n // The vertexData.tangent is stored as xyzw.\n // So we need to skip every fourth vertexData.tangent.\n if ((index + 1) % 4 !== 0) {\n tangents[dataIndex] = data[dataIndex] + value;\n dataIndex++;\n }\n });\n babylonMorphTarget.setTangents(tangents);\n });\n return Promise.all(promises).then(() => {});\n }\n static _LoadTransform(node, babylonNode) {\n // Ignore the TRS of skinned nodes.\n // See https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#skins (second implementation note)\n if (node.skin != undefined) {\n return;\n }\n let position = Vector3.Zero();\n let rotation = Quaternion.Identity();\n let scaling = Vector3.One();\n if (node.matrix) {\n const matrix = Matrix.FromArray(node.matrix);\n matrix.decompose(scaling, rotation, position);\n } else {\n if (node.translation) {\n position = Vector3.FromArray(node.translation);\n }\n if (node.rotation) {\n rotation = Quaternion.FromArray(node.rotation);\n }\n if (node.scale) {\n scaling = Vector3.FromArray(node.scale);\n }\n }\n babylonNode.position = position;\n babylonNode.rotationQuaternion = rotation;\n babylonNode.scaling = scaling;\n }\n _loadSkinAsync(context, node, skin, assign) {\n const extensionPromise = this._extensionsLoadSkinAsync(context, node, skin);\n if (extensionPromise) {\n return extensionPromise;\n }\n if (skin._data) {\n assign(skin._data.babylonSkeleton);\n return skin._data.promise;\n }\n const skeletonId = `skeleton${skin.index}`;\n this._babylonScene._blockEntityCollection = !!this._assetContainer;\n const babylonSkeleton = new Skeleton(skin.name || skeletonId, skeletonId, this._babylonScene);\n babylonSkeleton._parentContainer = this._assetContainer;\n this._babylonScene._blockEntityCollection = false;\n this._loadBones(context, skin, babylonSkeleton);\n const promise = this._loadSkinInverseBindMatricesDataAsync(context, skin).then(inverseBindMatricesData => {\n this._updateBoneMatrices(babylonSkeleton, inverseBindMatricesData);\n });\n skin._data = {\n babylonSkeleton: babylonSkeleton,\n promise: promise\n };\n assign(babylonSkeleton);\n return promise;\n }\n _loadBones(context, skin, babylonSkeleton) {\n if (skin.skeleton == undefined || this._parent.alwaysComputeSkeletonRootNode) {\n const rootNode = this._findSkeletonRootNode(`${context}/joints`, skin.joints);\n if (rootNode) {\n if (skin.skeleton === undefined) {\n skin.skeleton = rootNode.index;\n } else {\n const isParent = (a, b) => {\n for (; b.parent; b = b.parent) {\n if (b.parent === a) {\n return true;\n }\n }\n return false;\n };\n const skeletonNode = ArrayItem.Get(`${context}/skeleton`, this._gltf.nodes, skin.skeleton);\n if (skeletonNode !== rootNode && !isParent(skeletonNode, rootNode)) {\n Logger.Warn(`${context}/skeleton: Overriding with nearest common ancestor as skeleton node is not a common root`);\n skin.skeleton = rootNode.index;\n }\n }\n } else {\n Logger.Warn(`${context}: Failed to find common root`);\n }\n }\n const babylonBones = {};\n for (const index of skin.joints) {\n const node = ArrayItem.Get(`${context}/joints/${index}`, this._gltf.nodes, index);\n this._loadBone(node, skin, babylonSkeleton, babylonBones);\n }\n }\n _findSkeletonRootNode(context, joints) {\n if (joints.length === 0) {\n return null;\n }\n const paths = {};\n for (const index of joints) {\n const path = [];\n let node = ArrayItem.Get(`${context}/${index}`, this._gltf.nodes, index);\n while (node.index !== -1) {\n path.unshift(node);\n node = node.parent;\n }\n paths[index] = path;\n }\n let rootNode = null;\n for (let i = 0;; ++i) {\n let path = paths[joints[0]];\n if (i >= path.length) {\n return rootNode;\n }\n const node = path[i];\n for (let j = 1; j < joints.length; ++j) {\n path = paths[joints[j]];\n if (i >= path.length || node !== path[i]) {\n return rootNode;\n }\n }\n rootNode = node;\n }\n }\n _loadBone(node, skin, babylonSkeleton, babylonBones) {\n let babylonBone = babylonBones[node.index];\n if (babylonBone) {\n return babylonBone;\n }\n let parentBabylonBone = null;\n if (node.index !== skin.skeleton) {\n if (node.parent && node.parent.index !== -1) {\n parentBabylonBone = this._loadBone(node.parent, skin, babylonSkeleton, babylonBones);\n } else if (skin.skeleton !== undefined) {\n Logger.Warn(`/skins/${skin.index}/skeleton: Skeleton node is not a common root`);\n }\n }\n const boneIndex = skin.joints.indexOf(node.index);\n babylonBone = new Bone(node.name || `joint${node.index}`, babylonSkeleton, parentBabylonBone, this._getNodeMatrix(node), null, null, boneIndex);\n babylonBones[node.index] = babylonBone;\n // Wait until the scene is loaded to ensure the transform nodes are loaded.\n this._postSceneLoadActions.push(() => {\n // Link the Babylon bone with the corresponding Babylon transform node.\n // A glTF joint is a pointer to a glTF node in the glTF node hierarchy similar to Unity3D.\n babylonBone.linkTransformNode(node._babylonTransformNode);\n });\n return babylonBone;\n }\n _loadSkinInverseBindMatricesDataAsync(context, skin) {\n if (skin.inverseBindMatrices == undefined) {\n return Promise.resolve(null);\n }\n const accessor = ArrayItem.Get(`${context}/inverseBindMatrices`, this._gltf.accessors, skin.inverseBindMatrices);\n return this._loadFloatAccessorAsync(`/accessors/${accessor.index}`, accessor);\n }\n _updateBoneMatrices(babylonSkeleton, inverseBindMatricesData) {\n for (const babylonBone of babylonSkeleton.bones) {\n const baseMatrix = Matrix.Identity();\n const boneIndex = babylonBone._index;\n if (inverseBindMatricesData && boneIndex !== -1) {\n Matrix.FromArrayToRef(inverseBindMatricesData, boneIndex * 16, baseMatrix);\n baseMatrix.invertToRef(baseMatrix);\n }\n const babylonParentBone = babylonBone.getParent();\n if (babylonParentBone) {\n baseMatrix.multiplyToRef(babylonParentBone.getAbsoluteInverseBindMatrix(), baseMatrix);\n }\n babylonBone.updateMatrix(baseMatrix, false, false);\n babylonBone._updateAbsoluteBindMatrices(undefined, false);\n }\n }\n _getNodeMatrix(node) {\n return node.matrix ? Matrix.FromArray(node.matrix) : Matrix.Compose(node.scale ? Vector3.FromArray(node.scale) : Vector3.One(), node.rotation ? Quaternion.FromArray(node.rotation) : Quaternion.Identity(), node.translation ? Vector3.FromArray(node.translation) : Vector3.Zero());\n }\n /**\n * Loads a glTF camera.\n * @param context The context when loading the asset\n * @param camera The glTF camera property\n * @param assign A function called synchronously after parsing the glTF properties\n * @returns A promise that resolves with the loaded Babylon camera when the load is complete\n */\n loadCameraAsync(context, camera, assign = () => {}) {\n const extensionPromise = this._extensionsLoadCameraAsync(context, camera, assign);\n if (extensionPromise) {\n return extensionPromise;\n }\n const promises = new Array();\n this.logOpen(`${context} ${camera.name || \"\"}`);\n this._babylonScene._blockEntityCollection = !!this._assetContainer;\n const babylonCamera = new FreeCamera(camera.name || `camera${camera.index}`, Vector3.Zero(), this._babylonScene, false);\n babylonCamera._parentContainer = this._assetContainer;\n this._babylonScene._blockEntityCollection = false;\n babylonCamera.ignoreParentScaling = true;\n camera._babylonCamera = babylonCamera;\n // Rotation by 180 as glTF has a different convention than Babylon.\n babylonCamera.rotation.set(0, Math.PI, 0);\n switch (camera.type) {\n case \"perspective\" /* CameraType.PERSPECTIVE */:\n {\n const perspective = camera.perspective;\n if (!perspective) {\n throw new Error(`${context}: Camera perspective properties are missing`);\n }\n babylonCamera.fov = perspective.yfov;\n babylonCamera.minZ = perspective.znear;\n babylonCamera.maxZ = perspective.zfar || 0;\n break;\n }\n case \"orthographic\" /* CameraType.ORTHOGRAPHIC */:\n {\n if (!camera.orthographic) {\n throw new Error(`${context}: Camera orthographic properties are missing`);\n }\n babylonCamera.mode = Camera.ORTHOGRAPHIC_CAMERA;\n babylonCamera.orthoLeft = -camera.orthographic.xmag;\n babylonCamera.orthoRight = camera.orthographic.xmag;\n babylonCamera.orthoBottom = -camera.orthographic.ymag;\n babylonCamera.orthoTop = camera.orthographic.ymag;\n babylonCamera.minZ = camera.orthographic.znear;\n babylonCamera.maxZ = camera.orthographic.zfar;\n break;\n }\n default:\n {\n throw new Error(`${context}: Invalid camera type (${camera.type})`);\n }\n }\n GLTFLoader.AddPointerMetadata(babylonCamera, context);\n this._parent.onCameraLoadedObservable.notifyObservers(babylonCamera);\n assign(babylonCamera);\n this.logClose();\n return Promise.all(promises).then(() => {\n return babylonCamera;\n });\n }\n _loadAnimationsAsync() {\n const animations = this._gltf.animations;\n if (!animations) {\n return Promise.resolve();\n }\n const promises = new Array();\n for (let index = 0; index < animations.length; index++) {\n const animation = animations[index];\n promises.push(this.loadAnimationAsync(`/animations/${animation.index}`, animation).then(animationGroup => {\n // Delete the animation group if it ended up not having any animations in it.\n if (animationGroup.targetedAnimations.length === 0) {\n animationGroup.dispose();\n }\n }));\n }\n return Promise.all(promises).then(() => {});\n }\n /**\n * Loads a glTF animation.\n * @param context The context when loading the asset\n * @param animation The glTF animation property\n * @returns A promise that resolves with the loaded Babylon animation group when the load is complete\n */\n loadAnimationAsync(context, animation) {\n const promise = this._extensionsLoadAnimationAsync(context, animation);\n if (promise) {\n return promise;\n }\n this._babylonScene._blockEntityCollection = !!this._assetContainer;\n const babylonAnimationGroup = new AnimationGroup(animation.name || `animation${animation.index}`, this._babylonScene);\n babylonAnimationGroup._parentContainer = this._assetContainer;\n this._babylonScene._blockEntityCollection = false;\n animation._babylonAnimationGroup = babylonAnimationGroup;\n const promises = new Array();\n ArrayItem.Assign(animation.channels);\n ArrayItem.Assign(animation.samplers);\n for (const channel of animation.channels) {\n promises.push(this._loadAnimationChannelAsync(`${context}/channels/${channel.index}`, context, animation, channel, (babylonTarget, babylonAnimation) => {\n babylonTarget.animations = babylonTarget.animations || [];\n babylonTarget.animations.push(babylonAnimation);\n babylonAnimationGroup.addTargetedAnimation(babylonAnimation, babylonTarget);\n }));\n }\n return Promise.all(promises).then(() => {\n babylonAnimationGroup.normalize(0);\n return babylonAnimationGroup;\n });\n }\n /**\n * @hidden\n * Loads a glTF animation channel.\n * @param context The context when loading the asset\n * @param animationContext The context of the animation when loading the asset\n * @param animation The glTF animation property\n * @param channel The glTF animation channel property\n * @param onLoad Called for each animation loaded\n * @returns A void promise that resolves when the load is complete\n */\n _loadAnimationChannelAsync(context, animationContext, animation, channel, onLoad) {\n const promise = this._extensionsLoadAnimationChannelAsync(context, animationContext, animation, channel, onLoad);\n if (promise) {\n return promise;\n }\n if (channel.target.node == undefined) {\n return Promise.resolve();\n }\n const targetNode = ArrayItem.Get(`${context}/target/node`, this._gltf.nodes, channel.target.node);\n // Ignore animations that have no animation targets.\n if (channel.target.path === \"weights\" /* AnimationChannelTargetPath.WEIGHTS */ && !targetNode._numMorphTargets || channel.target.path !== \"weights\" /* AnimationChannelTargetPath.WEIGHTS */ && !targetNode._babylonTransformNode) {\n return Promise.resolve();\n }\n let properties;\n switch (channel.target.path) {\n case \"translation\" /* AnimationChannelTargetPath.TRANSLATION */:\n {\n properties = nodeAnimationData.translation;\n break;\n }\n case \"rotation\" /* AnimationChannelTargetPath.ROTATION */:\n {\n properties = nodeAnimationData.rotation;\n break;\n }\n case \"scale\" /* AnimationChannelTargetPath.SCALE */:\n {\n properties = nodeAnimationData.scale;\n break;\n }\n case \"weights\" /* AnimationChannelTargetPath.WEIGHTS */:\n {\n properties = nodeAnimationData.weights;\n break;\n }\n default:\n {\n throw new Error(`${context}/target/path: Invalid value (${channel.target.path})`);\n }\n }\n const targetInfo = {\n object: targetNode,\n info: properties\n };\n return this._loadAnimationChannelFromTargetInfoAsync(context, animationContext, animation, channel, targetInfo, onLoad);\n }\n /**\n * @hidden\n * Loads a glTF animation channel.\n * @param context The context when loading the asset\n * @param animationContext The context of the animation when loading the asset\n * @param animation The glTF animation property\n * @param channel The glTF animation channel property\n * @param targetInfo The glTF target and properties\n * @param onLoad Called for each animation loaded\n * @returns A void promise that resolves when the load is complete\n */\n _loadAnimationChannelFromTargetInfoAsync(context, animationContext, animation, channel, targetInfo, onLoad) {\n const fps = this.parent.targetFps;\n const invfps = 1 / fps;\n const sampler = ArrayItem.Get(`${context}/sampler`, animation.samplers, channel.sampler);\n return this._loadAnimationSamplerAsync(`${animationContext}/samplers/${channel.sampler}`, sampler).then(data => {\n let numAnimations = 0;\n const target = targetInfo.object;\n const propertyInfos = targetInfo.info;\n // Extract the corresponding values from the read value.\n // GLTF values may be dispatched to several Babylon properties.\n // For example, baseColorFactor [`r`, `g`, `b`, `a`] is dispatched to\n // - albedoColor as Color3(`r`, `g`, `b`)\n // - alpha as `a`\n for (const propertyInfo of propertyInfos) {\n const stride = propertyInfo.getStride(target);\n const input = data.input;\n const output = data.output;\n const keys = new Array(input.length);\n let outputOffset = 0;\n switch (data.interpolation) {\n case \"STEP\" /* AnimationSamplerInterpolation.STEP */:\n {\n for (let index = 0; index < input.length; index++) {\n const value = propertyInfo.getValue(target, output, outputOffset, 1);\n outputOffset += stride;\n keys[index] = {\n frame: input[index] * fps,\n value: value,\n interpolation: AnimationKeyInterpolation.STEP\n };\n }\n break;\n }\n case \"CUBICSPLINE\" /* AnimationSamplerInterpolation.CUBICSPLINE */:\n {\n for (let index = 0; index < input.length; index++) {\n const inTangent = propertyInfo.getValue(target, output, outputOffset, invfps);\n outputOffset += stride;\n const value = propertyInfo.getValue(target, output, outputOffset, 1);\n outputOffset += stride;\n const outTangent = propertyInfo.getValue(target, output, outputOffset, invfps);\n outputOffset += stride;\n keys[index] = {\n frame: input[index] * fps,\n inTangent: inTangent,\n value: value,\n outTangent: outTangent\n };\n }\n break;\n }\n case \"LINEAR\" /* AnimationSamplerInterpolation.LINEAR */:\n {\n for (let index = 0; index < input.length; index++) {\n const value = propertyInfo.getValue(target, output, outputOffset, 1);\n outputOffset += stride;\n keys[index] = {\n frame: input[index] * fps,\n value: value\n };\n }\n break;\n }\n }\n if (outputOffset > 0) {\n const name = `${animation.name || `animation${animation.index}`}_channel${channel.index}_${numAnimations}`;\n propertyInfo.buildAnimations(target, name, fps, keys, (babylonAnimatable, babylonAnimation) => {\n ++numAnimations;\n onLoad(babylonAnimatable, babylonAnimation);\n });\n }\n }\n });\n }\n _loadAnimationSamplerAsync(context, sampler) {\n if (sampler._data) {\n return sampler._data;\n }\n const interpolation = sampler.interpolation || \"LINEAR\" /* AnimationSamplerInterpolation.LINEAR */;\n switch (interpolation) {\n case \"STEP\" /* AnimationSamplerInterpolation.STEP */:\n case \"LINEAR\" /* AnimationSamplerInterpolation.LINEAR */:\n case \"CUBICSPLINE\" /* AnimationSamplerInterpolation.CUBICSPLINE */:\n {\n break;\n }\n default:\n {\n throw new Error(`${context}/interpolation: Invalid value (${sampler.interpolation})`);\n }\n }\n const inputAccessor = ArrayItem.Get(`${context}/input`, this._gltf.accessors, sampler.input);\n const outputAccessor = ArrayItem.Get(`${context}/output`, this._gltf.accessors, sampler.output);\n sampler._data = Promise.all([this._loadFloatAccessorAsync(`/accessors/${inputAccessor.index}`, inputAccessor), this._loadFloatAccessorAsync(`/accessors/${outputAccessor.index}`, outputAccessor)]).then(([inputData, outputData]) => {\n return {\n input: inputData,\n interpolation: interpolation,\n output: outputData\n };\n });\n return sampler._data;\n }\n /**\n * Loads a glTF buffer.\n * @param context The context when loading the asset\n * @param buffer The glTF buffer property\n * @param byteOffset The byte offset to use\n * @param byteLength The byte length to use\n * @returns A promise that resolves with the loaded data when the load is complete\n */\n loadBufferAsync(context, buffer, byteOffset, byteLength) {\n const extensionPromise = this._extensionsLoadBufferAsync(context, buffer, byteOffset, byteLength);\n if (extensionPromise) {\n return extensionPromise;\n }\n if (!buffer._data) {\n if (buffer.uri) {\n buffer._data = this.loadUriAsync(`${context}/uri`, buffer, buffer.uri);\n } else {\n if (!this._bin) {\n throw new Error(`${context}: Uri is missing or the binary glTF is missing its binary chunk`);\n }\n buffer._data = this._bin.readAsync(0, buffer.byteLength);\n }\n }\n return buffer._data.then(data => {\n try {\n return new Uint8Array(data.buffer, data.byteOffset + byteOffset, byteLength);\n } catch (e) {\n throw new Error(`${context}: ${e.message}`);\n }\n });\n }\n /**\n * Loads a glTF buffer view.\n * @param context The context when loading the asset\n * @param bufferView The glTF buffer view property\n * @returns A promise that resolves with the loaded data when the load is complete\n */\n loadBufferViewAsync(context, bufferView) {\n const extensionPromise = this._extensionsLoadBufferViewAsync(context, bufferView);\n if (extensionPromise) {\n return extensionPromise;\n }\n if (bufferView._data) {\n return bufferView._data;\n }\n const buffer = ArrayItem.Get(`${context}/buffer`, this._gltf.buffers, bufferView.buffer);\n bufferView._data = this.loadBufferAsync(`/buffers/${buffer.index}`, buffer, bufferView.byteOffset || 0, bufferView.byteLength);\n return bufferView._data;\n }\n _loadAccessorAsync(context, accessor, constructor) {\n if (accessor._data) {\n return accessor._data;\n }\n const numComponents = GLTFLoader._GetNumComponents(context, accessor.type);\n const byteStride = numComponents * VertexBuffer.GetTypeByteLength(accessor.componentType);\n const length = numComponents * accessor.count;\n if (accessor.bufferView == undefined) {\n accessor._data = Promise.resolve(new constructor(length));\n } else {\n const bufferView = ArrayItem.Get(`${context}/bufferView`, this._gltf.bufferViews, accessor.bufferView);\n accessor._data = this.loadBufferViewAsync(`/bufferViews/${bufferView.index}`, bufferView).then(data => {\n if (accessor.componentType === 5126 /* AccessorComponentType.FLOAT */ && !accessor.normalized && (!bufferView.byteStride || bufferView.byteStride === byteStride)) {\n return GLTFLoader._GetTypedArray(context, accessor.componentType, data, accessor.byteOffset, length);\n } else {\n const typedArray = new constructor(length);\n VertexBuffer.ForEach(data, accessor.byteOffset || 0, bufferView.byteStride || byteStride, numComponents, accessor.componentType, typedArray.length, accessor.normalized || false, (value, index) => {\n typedArray[index] = value;\n });\n return typedArray;\n }\n });\n }\n if (accessor.sparse) {\n const sparse = accessor.sparse;\n accessor._data = accessor._data.then(data => {\n const typedArray = data;\n const indicesBufferView = ArrayItem.Get(`${context}/sparse/indices/bufferView`, this._gltf.bufferViews, sparse.indices.bufferView);\n const valuesBufferView = ArrayItem.Get(`${context}/sparse/values/bufferView`, this._gltf.bufferViews, sparse.values.bufferView);\n return Promise.all([this.loadBufferViewAsync(`/bufferViews/${indicesBufferView.index}`, indicesBufferView), this.loadBufferViewAsync(`/bufferViews/${valuesBufferView.index}`, valuesBufferView)]).then(([indicesData, valuesData]) => {\n const indices = GLTFLoader._GetTypedArray(`${context}/sparse/indices`, sparse.indices.componentType, indicesData, sparse.indices.byteOffset, sparse.count);\n const sparseLength = numComponents * sparse.count;\n let values;\n if (accessor.componentType === 5126 /* AccessorComponentType.FLOAT */ && !accessor.normalized) {\n values = GLTFLoader._GetTypedArray(`${context}/sparse/values`, accessor.componentType, valuesData, sparse.values.byteOffset, sparseLength);\n } else {\n const sparseData = GLTFLoader._GetTypedArray(`${context}/sparse/values`, accessor.componentType, valuesData, sparse.values.byteOffset, sparseLength);\n values = new constructor(sparseLength);\n VertexBuffer.ForEach(sparseData, 0, byteStride, numComponents, accessor.componentType, values.length, accessor.normalized || false, (value, index) => {\n values[index] = value;\n });\n }\n let valuesIndex = 0;\n for (let indicesIndex = 0; indicesIndex < indices.length; indicesIndex++) {\n let dataIndex = indices[indicesIndex] * numComponents;\n for (let componentIndex = 0; componentIndex < numComponents; componentIndex++) {\n typedArray[dataIndex++] = values[valuesIndex++];\n }\n }\n return typedArray;\n });\n });\n }\n return accessor._data;\n }\n /**\n * @internal\n */\n _loadFloatAccessorAsync(context, accessor) {\n return this._loadAccessorAsync(context, accessor, Float32Array);\n }\n /**\n * @internal\n */\n _loadIndicesAccessorAsync(context, accessor) {\n if (accessor.type !== \"SCALAR\" /* AccessorType.SCALAR */) {\n throw new Error(`${context}/type: Invalid value ${accessor.type}`);\n }\n if (accessor.componentType !== 5121 /* AccessorComponentType.UNSIGNED_BYTE */ && accessor.componentType !== 5123 /* AccessorComponentType.UNSIGNED_SHORT */ && accessor.componentType !== 5125 /* AccessorComponentType.UNSIGNED_INT */) {\n throw new Error(`${context}/componentType: Invalid value ${accessor.componentType}`);\n }\n if (accessor._data) {\n return accessor._data;\n }\n if (accessor.sparse) {\n const constructor = GLTFLoader._GetTypedArrayConstructor(`${context}/componentType`, accessor.componentType);\n accessor._data = this._loadAccessorAsync(context, accessor, constructor);\n } else {\n const bufferView = ArrayItem.Get(`${context}/bufferView`, this._gltf.bufferViews, accessor.bufferView);\n accessor._data = this.loadBufferViewAsync(`/bufferViews/${bufferView.index}`, bufferView).then(data => {\n return GLTFLoader._GetTypedArray(context, accessor.componentType, data, accessor.byteOffset, accessor.count);\n });\n }\n return accessor._data;\n }\n /**\n * @internal\n */\n _loadVertexBufferViewAsync(bufferView) {\n if (bufferView._babylonBuffer) {\n return bufferView._babylonBuffer;\n }\n const engine = this._babylonScene.getEngine();\n bufferView._babylonBuffer = this.loadBufferViewAsync(`/bufferViews/${bufferView.index}`, bufferView).then(data => {\n return new Buffer(engine, data, false);\n });\n return bufferView._babylonBuffer;\n }\n /**\n * @internal\n */\n _loadVertexAccessorAsync(context, accessor, kind) {\n var _accessor$_babylonVer;\n if ((_accessor$_babylonVer = accessor._babylonVertexBuffer) !== null && _accessor$_babylonVer !== void 0 && _accessor$_babylonVer[kind]) {\n return accessor._babylonVertexBuffer[kind];\n }\n if (!accessor._babylonVertexBuffer) {\n accessor._babylonVertexBuffer = {};\n }\n const engine = this._babylonScene.getEngine();\n if (accessor.sparse || accessor.bufferView == undefined) {\n accessor._babylonVertexBuffer[kind] = this._loadFloatAccessorAsync(context, accessor).then(data => {\n return new VertexBuffer(engine, data, kind, false);\n });\n } else {\n const bufferView = ArrayItem.Get(`${context}/bufferView`, this._gltf.bufferViews, accessor.bufferView);\n accessor._babylonVertexBuffer[kind] = this._loadVertexBufferViewAsync(bufferView).then(babylonBuffer => {\n const numComponents = GLTFLoader._GetNumComponents(context, accessor.type);\n return new VertexBuffer(engine, babylonBuffer, kind, false, undefined, bufferView.byteStride, undefined, accessor.byteOffset, numComponents, accessor.componentType, accessor.normalized, true, undefined, true);\n });\n }\n return accessor._babylonVertexBuffer[kind];\n }\n _loadMaterialMetallicRoughnessPropertiesAsync(context, properties, babylonMaterial) {\n if (!(babylonMaterial instanceof PBRMaterial)) {\n throw new Error(`${context}: Material type not supported`);\n }\n const promises = new Array();\n if (properties) {\n if (properties.baseColorFactor) {\n babylonMaterial.albedoColor = Color3.FromArray(properties.baseColorFactor);\n babylonMaterial.alpha = properties.baseColorFactor[3];\n } else {\n babylonMaterial.albedoColor = Color3.White();\n }\n babylonMaterial.metallic = properties.metallicFactor == undefined ? 1 : properties.metallicFactor;\n babylonMaterial.roughness = properties.roughnessFactor == undefined ? 1 : properties.roughnessFactor;\n if (properties.baseColorTexture) {\n promises.push(this.loadTextureInfoAsync(`${context}/baseColorTexture`, properties.baseColorTexture, texture => {\n texture.name = `${babylonMaterial.name} (Base Color)`;\n babylonMaterial.albedoTexture = texture;\n }));\n }\n if (properties.metallicRoughnessTexture) {\n properties.metallicRoughnessTexture.nonColorData = true;\n promises.push(this.loadTextureInfoAsync(`${context}/metallicRoughnessTexture`, properties.metallicRoughnessTexture, texture => {\n texture.name = `${babylonMaterial.name} (Metallic Roughness)`;\n babylonMaterial.metallicTexture = texture;\n }));\n babylonMaterial.useMetallnessFromMetallicTextureBlue = true;\n babylonMaterial.useRoughnessFromMetallicTextureGreen = true;\n babylonMaterial.useRoughnessFromMetallicTextureAlpha = false;\n }\n }\n return Promise.all(promises).then(() => {});\n }\n /**\n * @internal\n */\n _loadMaterialAsync(context, material, babylonMesh, babylonDrawMode, assign = () => {}) {\n const extensionPromise = this._extensionsLoadMaterialAsync(context, material, babylonMesh, babylonDrawMode, assign);\n if (extensionPromise) {\n return extensionPromise;\n }\n material._data = material._data || {};\n let babylonData = material._data[babylonDrawMode];\n if (!babylonData) {\n this.logOpen(`${context} ${material.name || \"\"}`);\n const babylonMaterial = this.createMaterial(context, material, babylonDrawMode);\n babylonData = {\n babylonMaterial: babylonMaterial,\n babylonMeshes: [],\n promise: this.loadMaterialPropertiesAsync(context, material, babylonMaterial)\n };\n material._data[babylonDrawMode] = babylonData;\n GLTFLoader.AddPointerMetadata(babylonMaterial, context);\n this._parent.onMaterialLoadedObservable.notifyObservers(babylonMaterial);\n this.logClose();\n }\n if (babylonMesh) {\n babylonData.babylonMeshes.push(babylonMesh);\n babylonMesh.onDisposeObservable.addOnce(() => {\n const index = babylonData.babylonMeshes.indexOf(babylonMesh);\n if (index !== -1) {\n babylonData.babylonMeshes.splice(index, 1);\n }\n });\n }\n assign(babylonData.babylonMaterial);\n return babylonData.promise.then(() => {\n return babylonData.babylonMaterial;\n });\n }\n _createDefaultMaterial(name, babylonDrawMode) {\n this._babylonScene._blockEntityCollection = !!this._assetContainer;\n const babylonMaterial = new PBRMaterial(name, this._babylonScene);\n babylonMaterial._parentContainer = this._assetContainer;\n this._babylonScene._blockEntityCollection = false;\n // Moved to mesh so user can change materials on gltf meshes: babylonMaterial.sideOrientation = this._babylonScene.useRightHandedSystem ? Material.CounterClockWiseSideOrientation : Material.ClockWiseSideOrientation;\n babylonMaterial.fillMode = babylonDrawMode;\n babylonMaterial.enableSpecularAntiAliasing = true;\n babylonMaterial.useRadianceOverAlpha = !this._parent.transparencyAsCoverage;\n babylonMaterial.useSpecularOverAlpha = !this._parent.transparencyAsCoverage;\n babylonMaterial.transparencyMode = PBRMaterial.PBRMATERIAL_OPAQUE;\n babylonMaterial.metallic = 1;\n babylonMaterial.roughness = 1;\n return babylonMaterial;\n }\n /**\n * Creates a Babylon material from a glTF material.\n * @param context The context when loading the asset\n * @param material The glTF material property\n * @param babylonDrawMode The draw mode for the Babylon material\n * @returns The Babylon material\n */\n createMaterial(context, material, babylonDrawMode) {\n const extensionPromise = this._extensionsCreateMaterial(context, material, babylonDrawMode);\n if (extensionPromise) {\n return extensionPromise;\n }\n const name = material.name || `material${material.index}`;\n const babylonMaterial = this._createDefaultMaterial(name, babylonDrawMode);\n return babylonMaterial;\n }\n /**\n * Loads properties from a glTF material into a Babylon material.\n * @param context The context when loading the asset\n * @param material The glTF material property\n * @param babylonMaterial The Babylon material\n * @returns A promise that resolves when the load is complete\n */\n loadMaterialPropertiesAsync(context, material, babylonMaterial) {\n const extensionPromise = this._extensionsLoadMaterialPropertiesAsync(context, material, babylonMaterial);\n if (extensionPromise) {\n return extensionPromise;\n }\n const promises = new Array();\n promises.push(this.loadMaterialBasePropertiesAsync(context, material, babylonMaterial));\n if (material.pbrMetallicRoughness) {\n promises.push(this._loadMaterialMetallicRoughnessPropertiesAsync(`${context}/pbrMetallicRoughness`, material.pbrMetallicRoughness, babylonMaterial));\n }\n this.loadMaterialAlphaProperties(context, material, babylonMaterial);\n return Promise.all(promises).then(() => {});\n }\n /**\n * Loads the normal, occlusion, and emissive properties from a glTF material into a Babylon material.\n * @param context The context when loading the asset\n * @param material The glTF material property\n * @param babylonMaterial The Babylon material\n * @returns A promise that resolves when the load is complete\n */\n loadMaterialBasePropertiesAsync(context, material, babylonMaterial) {\n if (!(babylonMaterial instanceof PBRMaterial)) {\n throw new Error(`${context}: Material type not supported`);\n }\n const promises = new Array();\n babylonMaterial.emissiveColor = material.emissiveFactor ? Color3.FromArray(material.emissiveFactor) : new Color3(0, 0, 0);\n if (material.doubleSided) {\n babylonMaterial.backFaceCulling = false;\n babylonMaterial.twoSidedLighting = true;\n }\n if (material.normalTexture) {\n material.normalTexture.nonColorData = true;\n promises.push(this.loadTextureInfoAsync(`${context}/normalTexture`, material.normalTexture, texture => {\n texture.name = `${babylonMaterial.name} (Normal)`;\n babylonMaterial.bumpTexture = texture;\n }));\n babylonMaterial.invertNormalMapX = !this._babylonScene.useRightHandedSystem;\n babylonMaterial.invertNormalMapY = this._babylonScene.useRightHandedSystem;\n if (material.normalTexture.scale != undefined && babylonMaterial.bumpTexture) {\n babylonMaterial.bumpTexture.level = material.normalTexture.scale;\n }\n babylonMaterial.forceIrradianceInFragment = true;\n }\n if (material.occlusionTexture) {\n material.occlusionTexture.nonColorData = true;\n promises.push(this.loadTextureInfoAsync(`${context}/occlusionTexture`, material.occlusionTexture, texture => {\n texture.name = `${babylonMaterial.name} (Occlusion)`;\n babylonMaterial.ambientTexture = texture;\n }));\n babylonMaterial.useAmbientInGrayScale = true;\n if (material.occlusionTexture.strength != undefined) {\n babylonMaterial.ambientTextureStrength = material.occlusionTexture.strength;\n }\n }\n if (material.emissiveTexture) {\n promises.push(this.loadTextureInfoAsync(`${context}/emissiveTexture`, material.emissiveTexture, texture => {\n texture.name = `${babylonMaterial.name} (Emissive)`;\n babylonMaterial.emissiveTexture = texture;\n }));\n }\n return Promise.all(promises).then(() => {});\n }\n /**\n * Loads the alpha properties from a glTF material into a Babylon material.\n * Must be called after the setting the albedo texture of the Babylon material when the material has an albedo texture.\n * @param context The context when loading the asset\n * @param material The glTF material property\n * @param babylonMaterial The Babylon material\n */\n loadMaterialAlphaProperties(context, material, babylonMaterial) {\n if (!(babylonMaterial instanceof PBRMaterial)) {\n throw new Error(`${context}: Material type not supported`);\n }\n const alphaMode = material.alphaMode || \"OPAQUE\" /* MaterialAlphaMode.OPAQUE */;\n switch (alphaMode) {\n case \"OPAQUE\" /* MaterialAlphaMode.OPAQUE */:\n {\n babylonMaterial.transparencyMode = PBRMaterial.PBRMATERIAL_OPAQUE;\n babylonMaterial.alpha = 1.0; // Force alpha to 1.0 for opaque mode.\n break;\n }\n case \"MASK\" /* MaterialAlphaMode.MASK */:\n {\n babylonMaterial.transparencyMode = PBRMaterial.PBRMATERIAL_ALPHATEST;\n babylonMaterial.alphaCutOff = material.alphaCutoff == undefined ? 0.5 : material.alphaCutoff;\n if (babylonMaterial.albedoTexture) {\n babylonMaterial.albedoTexture.hasAlpha = true;\n }\n break;\n }\n case \"BLEND\" /* MaterialAlphaMode.BLEND */:\n {\n babylonMaterial.transparencyMode = PBRMaterial.PBRMATERIAL_ALPHABLEND;\n if (babylonMaterial.albedoTexture) {\n babylonMaterial.albedoTexture.hasAlpha = true;\n babylonMaterial.useAlphaFromAlbedoTexture = true;\n }\n break;\n }\n default:\n {\n throw new Error(`${context}/alphaMode: Invalid value (${material.alphaMode})`);\n }\n }\n }\n /**\n * Loads a glTF texture info.\n * @param context The context when loading the asset\n * @param textureInfo The glTF texture info property\n * @param assign A function called synchronously after parsing the glTF properties\n * @returns A promise that resolves with the loaded Babylon texture when the load is complete\n */\n loadTextureInfoAsync(context, textureInfo, assign = () => {}) {\n const extensionPromise = this._extensionsLoadTextureInfoAsync(context, textureInfo, assign);\n if (extensionPromise) {\n return extensionPromise;\n }\n this.logOpen(`${context}`);\n if (textureInfo.texCoord >= 6) {\n throw new Error(`${context}/texCoord: Invalid value (${textureInfo.texCoord})`);\n }\n const texture = ArrayItem.Get(`${context}/index`, this._gltf.textures, textureInfo.index);\n texture._textureInfo = textureInfo;\n const promise = this._loadTextureAsync(`/textures/${textureInfo.index}`, texture, babylonTexture => {\n babylonTexture.coordinatesIndex = textureInfo.texCoord || 0;\n GLTFLoader.AddPointerMetadata(babylonTexture, context);\n this._parent.onTextureLoadedObservable.notifyObservers(babylonTexture);\n assign(babylonTexture);\n });\n this.logClose();\n return promise;\n }\n /**\n * @internal\n */\n _loadTextureAsync(context, texture, assign = () => {}) {\n const extensionPromise = this._extensionsLoadTextureAsync(context, texture, assign);\n if (extensionPromise) {\n return extensionPromise;\n }\n this.logOpen(`${context} ${texture.name || \"\"}`);\n const sampler = texture.sampler == undefined ? GLTFLoader.DefaultSampler : ArrayItem.Get(`${context}/sampler`, this._gltf.samplers, texture.sampler);\n const image = ArrayItem.Get(`${context}/source`, this._gltf.images, texture.source);\n const promise = this._createTextureAsync(context, sampler, image, assign, undefined, !texture._textureInfo.nonColorData);\n this.logClose();\n return promise;\n }\n /**\n * @internal\n */\n _createTextureAsync(context, sampler, image, assign = () => {}, textureLoaderOptions, useSRGBBuffer) {\n const samplerData = this._loadSampler(`/samplers/${sampler.index}`, sampler);\n const promises = new Array();\n const deferred = new Deferred();\n this._babylonScene._blockEntityCollection = !!this._assetContainer;\n const textureCreationOptions = {\n noMipmap: samplerData.noMipMaps,\n invertY: false,\n samplingMode: samplerData.samplingMode,\n onLoad: () => {\n if (!this._disposed) {\n deferred.resolve();\n }\n },\n onError: (message, exception) => {\n if (!this._disposed) {\n deferred.reject(new Error(`${context}: ${exception && exception.message ? exception.message : message || \"Failed to load texture\"}`));\n }\n },\n mimeType: image.mimeType,\n loaderOptions: textureLoaderOptions,\n useSRGBBuffer: !!useSRGBBuffer && this._parent.useSRGBBuffers\n };\n const babylonTexture = new Texture(null, this._babylonScene, textureCreationOptions);\n babylonTexture._parentContainer = this._assetContainer;\n this._babylonScene._blockEntityCollection = false;\n promises.push(deferred.promise);\n promises.push(this.loadImageAsync(`/images/${image.index}`, image).then(data => {\n const name = image.uri || `${this._fileName}#image${image.index}`;\n const dataUrl = `data:${this._uniqueRootUrl}${name}`;\n babylonTexture.updateURL(dataUrl, data);\n }));\n babylonTexture.wrapU = samplerData.wrapU;\n babylonTexture.wrapV = samplerData.wrapV;\n assign(babylonTexture);\n return Promise.all(promises).then(() => {\n return babylonTexture;\n });\n }\n _loadSampler(context, sampler) {\n if (!sampler._data) {\n sampler._data = {\n noMipMaps: sampler.minFilter === 9728 /* TextureMinFilter.NEAREST */ || sampler.minFilter === 9729 /* TextureMinFilter.LINEAR */,\n samplingMode: GLTFLoader._GetTextureSamplingMode(context, sampler),\n wrapU: GLTFLoader._GetTextureWrapMode(`${context}/wrapS`, sampler.wrapS),\n wrapV: GLTFLoader._GetTextureWrapMode(`${context}/wrapT`, sampler.wrapT)\n };\n }\n return sampler._data;\n }\n /**\n * Loads a glTF image.\n * @param context The context when loading the asset\n * @param image The glTF image property\n * @returns A promise that resolves with the loaded data when the load is complete\n */\n loadImageAsync(context, image) {\n if (!image._data) {\n this.logOpen(`${context} ${image.name || \"\"}`);\n if (image.uri) {\n image._data = this.loadUriAsync(`${context}/uri`, image, image.uri);\n } else {\n const bufferView = ArrayItem.Get(`${context}/bufferView`, this._gltf.bufferViews, image.bufferView);\n image._data = this.loadBufferViewAsync(`/bufferViews/${bufferView.index}`, bufferView);\n }\n this.logClose();\n }\n return image._data;\n }\n /**\n * Loads a glTF uri.\n * @param context The context when loading the asset\n * @param property The glTF property associated with the uri\n * @param uri The base64 or relative uri\n * @returns A promise that resolves with the loaded data when the load is complete\n */\n loadUriAsync(context, property, uri) {\n const extensionPromise = this._extensionsLoadUriAsync(context, property, uri);\n if (extensionPromise) {\n return extensionPromise;\n }\n if (!GLTFLoader._ValidateUri(uri)) {\n throw new Error(`${context}: '${uri}' is invalid`);\n }\n if (IsBase64DataUrl(uri)) {\n const data = new Uint8Array(DecodeBase64UrlToBinary(uri));\n this.log(`${context}: Decoded ${uri.substr(0, 64)}... (${data.length} bytes)`);\n return Promise.resolve(data);\n }\n this.log(`${context}: Loading ${uri}`);\n return this._parent.preprocessUrlAsync(this._rootUrl + uri).then(url => {\n return new Promise((resolve, reject) => {\n this._parent._loadFile(this._babylonScene, url, data => {\n if (!this._disposed) {\n this.log(`${context}: Loaded ${uri} (${data.byteLength} bytes)`);\n resolve(new Uint8Array(data));\n }\n }, true, request => {\n reject(new LoadFileError(`${context}: Failed to load '${uri}'${request ? \": \" + request.status + \" \" + request.statusText : \"\"}`, request));\n });\n });\n });\n }\n /**\n * Adds a JSON pointer to the _internalMetadata of the Babylon object at `<object>._internalMetadata.gltf.pointers`.\n * @param babylonObject the Babylon object with _internalMetadata\n * @param pointer the JSON pointer\n */\n static AddPointerMetadata(babylonObject, pointer) {\n babylonObject.metadata = babylonObject.metadata || {};\n const metadata = babylonObject._internalMetadata = babylonObject._internalMetadata || {};\n const gltf = metadata.gltf = metadata.gltf || {};\n const pointers = gltf.pointers = gltf.pointers || [];\n pointers.push(pointer);\n }\n static _GetTextureWrapMode(context, mode) {\n // Set defaults if undefined\n mode = mode == undefined ? 10497 /* TextureWrapMode.REPEAT */ : mode;\n switch (mode) {\n case 33071 /* TextureWrapMode.CLAMP_TO_EDGE */:\n return Texture.CLAMP_ADDRESSMODE;\n case 33648 /* TextureWrapMode.MIRRORED_REPEAT */:\n return Texture.MIRROR_ADDRESSMODE;\n case 10497 /* TextureWrapMode.REPEAT */:\n return Texture.WRAP_ADDRESSMODE;\n default:\n Logger.Warn(`${context}: Invalid value (${mode})`);\n return Texture.WRAP_ADDRESSMODE;\n }\n }\n static _GetTextureSamplingMode(context, sampler) {\n // Set defaults if undefined\n const magFilter = sampler.magFilter == undefined ? 9729 /* TextureMagFilter.LINEAR */ : sampler.magFilter;\n const minFilter = sampler.minFilter == undefined ? 9987 /* TextureMinFilter.LINEAR_MIPMAP_LINEAR */ : sampler.minFilter;\n if (magFilter === 9729 /* TextureMagFilter.LINEAR */) {\n switch (minFilter) {\n case 9728 /* TextureMinFilter.NEAREST */:\n return Texture.LINEAR_NEAREST;\n case 9729 /* TextureMinFilter.LINEAR */:\n return Texture.LINEAR_LINEAR;\n case 9984 /* TextureMinFilter.NEAREST_MIPMAP_NEAREST */:\n return Texture.LINEAR_NEAREST_MIPNEAREST;\n case 9985 /* TextureMinFilter.LINEAR_MIPMAP_NEAREST */:\n return Texture.LINEAR_LINEAR_MIPNEAREST;\n case 9986 /* TextureMinFilter.NEAREST_MIPMAP_LINEAR */:\n return Texture.LINEAR_NEAREST_MIPLINEAR;\n case 9987 /* TextureMinFilter.LINEAR_MIPMAP_LINEAR */:\n return Texture.LINEAR_LINEAR_MIPLINEAR;\n default:\n Logger.Warn(`${context}/minFilter: Invalid value (${minFilter})`);\n return Texture.LINEAR_LINEAR_MIPLINEAR;\n }\n } else {\n if (magFilter !== 9728 /* TextureMagFilter.NEAREST */) {\n Logger.Warn(`${context}/magFilter: Invalid value (${magFilter})`);\n }\n switch (minFilter) {\n case 9728 /* TextureMinFilter.NEAREST */:\n return Texture.NEAREST_NEAREST;\n case 9729 /* TextureMinFilter.LINEAR */:\n return Texture.NEAREST_LINEAR;\n case 9984 /* TextureMinFilter.NEAREST_MIPMAP_NEAREST */:\n return Texture.NEAREST_NEAREST_MIPNEAREST;\n case 9985 /* TextureMinFilter.LINEAR_MIPMAP_NEAREST */:\n return Texture.NEAREST_LINEAR_MIPNEAREST;\n case 9986 /* TextureMinFilter.NEAREST_MIPMAP_LINEAR */:\n return Texture.NEAREST_NEAREST_MIPLINEAR;\n case 9987 /* TextureMinFilter.LINEAR_MIPMAP_LINEAR */:\n return Texture.NEAREST_LINEAR_MIPLINEAR;\n default:\n Logger.Warn(`${context}/minFilter: Invalid value (${minFilter})`);\n return Texture.NEAREST_NEAREST_MIPNEAREST;\n }\n }\n }\n static _GetTypedArrayConstructor(context, componentType) {\n switch (componentType) {\n case 5120 /* AccessorComponentType.BYTE */:\n return Int8Array;\n case 5121 /* AccessorComponentType.UNSIGNED_BYTE */:\n return Uint8Array;\n case 5122 /* AccessorComponentType.SHORT */:\n return Int16Array;\n case 5123 /* AccessorComponentType.UNSIGNED_SHORT */:\n return Uint16Array;\n case 5125 /* AccessorComponentType.UNSIGNED_INT */:\n return Uint32Array;\n case 5126 /* AccessorComponentType.FLOAT */:\n return Float32Array;\n default:\n throw new Error(`${context}: Invalid component type ${componentType}`);\n }\n }\n static _GetTypedArray(context, componentType, bufferView, byteOffset, length) {\n const buffer = bufferView.buffer;\n byteOffset = bufferView.byteOffset + (byteOffset || 0);\n const constructor = GLTFLoader._GetTypedArrayConstructor(`${context}/componentType`, componentType);\n const componentTypeLength = VertexBuffer.GetTypeByteLength(componentType);\n if (byteOffset % componentTypeLength !== 0) {\n // HACK: Copy the buffer if byte offset is not a multiple of component type byte length.\n Logger.Warn(`${context}: Copying buffer as byte offset (${byteOffset}) is not a multiple of component type byte length (${componentTypeLength})`);\n return new constructor(buffer.slice(byteOffset, byteOffset + length * componentTypeLength), 0);\n }\n return new constructor(buffer, byteOffset, length);\n }\n static _GetNumComponents(context, type) {\n switch (type) {\n case \"SCALAR\":\n return 1;\n case \"VEC2\":\n return 2;\n case \"VEC3\":\n return 3;\n case \"VEC4\":\n return 4;\n case \"MAT2\":\n return 4;\n case \"MAT3\":\n return 9;\n case \"MAT4\":\n return 16;\n }\n throw new Error(`${context}: Invalid type (${type})`);\n }\n static _ValidateUri(uri) {\n return Tools.IsBase64(uri) || uri.indexOf(\"..\") === -1;\n }\n /**\n * @internal\n */\n static _GetDrawMode(context, mode) {\n if (mode == undefined) {\n mode = 4 /* MeshPrimitiveMode.TRIANGLES */;\n }\n switch (mode) {\n case 0 /* MeshPrimitiveMode.POINTS */:\n return Material.PointListDrawMode;\n case 1 /* MeshPrimitiveMode.LINES */:\n return Material.LineListDrawMode;\n case 2 /* MeshPrimitiveMode.LINE_LOOP */:\n return Material.LineLoopDrawMode;\n case 3 /* MeshPrimitiveMode.LINE_STRIP */:\n return Material.LineStripDrawMode;\n case 4 /* MeshPrimitiveMode.TRIANGLES */:\n return Material.TriangleFillMode;\n case 5 /* MeshPrimitiveMode.TRIANGLE_STRIP */:\n return Material.TriangleStripDrawMode;\n case 6 /* MeshPrimitiveMode.TRIANGLE_FAN */:\n return Material.TriangleFanDrawMode;\n }\n throw new Error(`${context}: Invalid mesh primitive mode (${mode})`);\n }\n _compileMaterialsAsync() {\n this._parent._startPerformanceCounter(\"Compile materials\");\n const promises = new Array();\n if (this._gltf.materials) {\n for (const material of this._gltf.materials) {\n if (material._data) {\n for (const babylonDrawMode in material._data) {\n const babylonData = material._data[babylonDrawMode];\n for (const babylonMesh of babylonData.babylonMeshes) {\n // Ensure nonUniformScaling is set if necessary.\n babylonMesh.computeWorldMatrix(true);\n const babylonMaterial = babylonData.babylonMaterial;\n promises.push(babylonMaterial.forceCompilationAsync(babylonMesh));\n promises.push(babylonMaterial.forceCompilationAsync(babylonMesh, {\n useInstances: true\n }));\n if (this._parent.useClipPlane) {\n promises.push(babylonMaterial.forceCompilationAsync(babylonMesh, {\n clipPlane: true\n }));\n promises.push(babylonMaterial.forceCompilationAsync(babylonMesh, {\n clipPlane: true,\n useInstances: true\n }));\n }\n }\n }\n }\n }\n }\n return Promise.all(promises).then(() => {\n this._parent._endPerformanceCounter(\"Compile materials\");\n });\n }\n _compileShadowGeneratorsAsync() {\n this._parent._startPerformanceCounter(\"Compile shadow generators\");\n const promises = new Array();\n const lights = this._babylonScene.lights;\n for (const light of lights) {\n const generator = light.getShadowGenerator();\n if (generator) {\n promises.push(generator.forceCompilationAsync());\n }\n }\n return Promise.all(promises).then(() => {\n this._parent._endPerformanceCounter(\"Compile shadow generators\");\n });\n }\n _forEachExtensions(action) {\n for (const extension of this._extensions) {\n if (extension.enabled) {\n action(extension);\n }\n }\n }\n _applyExtensions(property, functionName, actionAsync) {\n for (const extension of this._extensions) {\n if (extension.enabled) {\n const id = `${extension.name}.${functionName}`;\n const loaderProperty = property;\n loaderProperty._activeLoaderExtensionFunctions = loaderProperty._activeLoaderExtensionFunctions || {};\n const activeLoaderExtensionFunctions = loaderProperty._activeLoaderExtensionFunctions;\n if (!activeLoaderExtensionFunctions[id]) {\n activeLoaderExtensionFunctions[id] = true;\n try {\n const result = actionAsync(extension);\n if (result) {\n return result;\n }\n } finally {\n delete activeLoaderExtensionFunctions[id];\n }\n }\n }\n }\n return null;\n }\n _extensionsOnLoading() {\n this._forEachExtensions(extension => extension.onLoading && extension.onLoading());\n }\n _extensionsOnReady() {\n this._forEachExtensions(extension => extension.onReady && extension.onReady());\n }\n _extensionsLoadSceneAsync(context, scene) {\n return this._applyExtensions(scene, \"loadScene\", extension => extension.loadSceneAsync && extension.loadSceneAsync(context, scene));\n }\n _extensionsLoadNodeAsync(context, node, assign) {\n return this._applyExtensions(node, \"loadNode\", extension => extension.loadNodeAsync && extension.loadNodeAsync(context, node, assign));\n }\n _extensionsLoadCameraAsync(context, camera, assign) {\n return this._applyExtensions(camera, \"loadCamera\", extension => extension.loadCameraAsync && extension.loadCameraAsync(context, camera, assign));\n }\n _extensionsLoadVertexDataAsync(context, primitive, babylonMesh) {\n return this._applyExtensions(primitive, \"loadVertexData\", extension => extension._loadVertexDataAsync && extension._loadVertexDataAsync(context, primitive, babylonMesh));\n }\n _extensionsLoadMeshPrimitiveAsync(context, name, node, mesh, primitive, assign) {\n return this._applyExtensions(primitive, \"loadMeshPrimitive\", extension => extension._loadMeshPrimitiveAsync && extension._loadMeshPrimitiveAsync(context, name, node, mesh, primitive, assign));\n }\n _extensionsLoadMaterialAsync(context, material, babylonMesh, babylonDrawMode, assign) {\n return this._applyExtensions(material, \"loadMaterial\", extension => extension._loadMaterialAsync && extension._loadMaterialAsync(context, material, babylonMesh, babylonDrawMode, assign));\n }\n _extensionsCreateMaterial(context, material, babylonDrawMode) {\n return this._applyExtensions(material, \"createMaterial\", extension => extension.createMaterial && extension.createMaterial(context, material, babylonDrawMode));\n }\n _extensionsLoadMaterialPropertiesAsync(context, material, babylonMaterial) {\n return this._applyExtensions(material, \"loadMaterialProperties\", extension => extension.loadMaterialPropertiesAsync && extension.loadMaterialPropertiesAsync(context, material, babylonMaterial));\n }\n _extensionsLoadTextureInfoAsync(context, textureInfo, assign) {\n return this._applyExtensions(textureInfo, \"loadTextureInfo\", extension => extension.loadTextureInfoAsync && extension.loadTextureInfoAsync(context, textureInfo, assign));\n }\n _extensionsLoadTextureAsync(context, texture, assign) {\n return this._applyExtensions(texture, \"loadTexture\", extension => extension._loadTextureAsync && extension._loadTextureAsync(context, texture, assign));\n }\n _extensionsLoadAnimationAsync(context, animation) {\n return this._applyExtensions(animation, \"loadAnimation\", extension => extension.loadAnimationAsync && extension.loadAnimationAsync(context, animation));\n }\n _extensionsLoadAnimationChannelAsync(context, animationContext, animation, channel, onLoad) {\n return this._applyExtensions(animation, \"loadAnimationChannel\", extension => extension._loadAnimationChannelAsync && extension._loadAnimationChannelAsync(context, animationContext, animation, channel, onLoad));\n }\n _extensionsLoadSkinAsync(context, node, skin) {\n return this._applyExtensions(skin, \"loadSkin\", extension => extension._loadSkinAsync && extension._loadSkinAsync(context, node, skin));\n }\n _extensionsLoadUriAsync(context, property, uri) {\n return this._applyExtensions(property, \"loadUri\", extension => extension._loadUriAsync && extension._loadUriAsync(context, property, uri));\n }\n _extensionsLoadBufferViewAsync(context, bufferView) {\n return this._applyExtensions(bufferView, \"loadBufferView\", extension => extension.loadBufferViewAsync && extension.loadBufferViewAsync(context, bufferView));\n }\n _extensionsLoadBufferAsync(context, buffer, byteOffset, byteLength) {\n return this._applyExtensions(buffer, \"loadBuffer\", extension => extension.loadBufferAsync && extension.loadBufferAsync(context, buffer, byteOffset, byteLength));\n }\n /**\n * Helper method called by a loader extension to load an glTF extension.\n * @param context The context when loading the asset\n * @param property The glTF property to load the extension from\n * @param extensionName The name of the extension to load\n * @param actionAsync The action to run\n * @returns The promise returned by actionAsync or null if the extension does not exist\n */\n static LoadExtensionAsync(context, property, extensionName, actionAsync) {\n if (!property.extensions) {\n return null;\n }\n const extensions = property.extensions;\n const extension = extensions[extensionName];\n if (!extension) {\n return null;\n }\n return actionAsync(`${context}/extensions/${extensionName}`, extension);\n }\n /**\n * Helper method called by a loader extension to load a glTF extra.\n * @param context The context when loading the asset\n * @param property The glTF property to load the extra from\n * @param extensionName The name of the extension to load\n * @param actionAsync The action to run\n * @returns The promise returned by actionAsync or null if the extra does not exist\n */\n static LoadExtraAsync(context, property, extensionName, actionAsync) {\n if (!property.extras) {\n return null;\n }\n const extras = property.extras;\n const extra = extras[extensionName];\n if (!extra) {\n return null;\n }\n return actionAsync(`${context}/extras/${extensionName}`, extra);\n }\n /**\n * Checks for presence of an extension.\n * @param name The name of the extension to check\n * @returns A boolean indicating the presence of the given extension name in `extensionsUsed`\n */\n isExtensionUsed(name) {\n return !!this._gltf.extensionsUsed && this._gltf.extensionsUsed.indexOf(name) !== -1;\n }\n /**\n * Increments the indentation level and logs a message.\n * @param message The message to log\n */\n logOpen(message) {\n this._parent._logOpen(message);\n }\n /**\n * Decrements the indentation level.\n */\n logClose() {\n this._parent._logClose();\n }\n /**\n * Logs a message\n * @param message The message to log\n */\n log(message) {\n this._parent._log(message);\n }\n /**\n * Starts a performance counter.\n * @param counterName The name of the performance counter\n */\n startPerformanceCounter(counterName) {\n this._parent._startPerformanceCounter(counterName);\n }\n /**\n * Ends a performance counter.\n * @param counterName The name of the performance counter\n */\n endPerformanceCounter(counterName) {\n this._parent._endPerformanceCounter(counterName);\n }\n}\nGLTFLoader._RegisteredExtensions = {};\n/**\n * The default glTF sampler.\n */\nGLTFLoader.DefaultSampler = {\n index: -1\n};\nGLTFFileLoader._CreateGLTF2Loader = parent => new 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AR_NEAREST_MIPLINEAR","LINEAR_LINEAR_MIPLINEAR","NEAREST_NEAREST","NEAREST_LINEAR","NEAREST_NEAREST_MIPNEAREST","NEAREST_LINEAR_MIPNEAREST","NEAREST_NEAREST_MIPLINEAR","NEAREST_LINEAR_MIPLINEAR","Int8Array","Int16Array","Uint16Array","Uint32Array","componentTypeLength","slice","IsBase64","PointListDrawMode","LineListDrawMode","LineLoopDrawMode","LineStripDrawMode","TriangleStripDrawMode","TriangleFanDrawMode","computeWorldMatrix","forceCompilationAsync","useInstances","useClipPlane","clipPlane","light","generator","getShadowGenerator","_forEachExtensions","_applyExtensions","functionName","actionAsync","id","loaderProperty","_activeLoaderExtensionFunctions","activeLoaderExtensionFunctions","onLoading","onReady","_loadUriAsync","LoadExtensionAsync","extensionName","extensions","LoadExtraAsync","extra","isExtensionUsed","extensionsUsed","_logOpen","_logClose","_log","startPerformanceCounter","counterName","endPerformanceCounter","_CreateGLTF2Loader"],"sources":["F:/workspace/202226701027/huinongbao-app/node_modules/@babylonjs/loaders/glTF/2.0/glTFLoader.js"],"sourcesContent":["import { Deferred } from \"@babylonjs/core/Misc/deferred.js\";\nimport { Quaternion, Vector3, Matrix, TmpVectors } from \"@babylonjs/core/Maths/math.vector.js\";\nimport { Color3 } from \"@babylonjs/core/Maths/math.color.js\";\nimport { Tools } from \"@babylonjs/core/Misc/tools.js\";\nimport { Camera } from \"@babylonjs/core/Cameras/camera.js\";\nimport { FreeCamera } from \"@babylonjs/core/Cameras/freeCamera.js\";\nimport { AnimationKeyInterpolation } from \"@babylonjs/core/Animations/animationKey.js\";\nimport { AnimationGroup } from \"@babylonjs/core/Animations/animationGroup.js\";\nimport { Bone } from \"@babylonjs/core/Bones/bone.js\";\nimport { Skeleton } from \"@babylonjs/core/Bones/skeleton.js\";\nimport { Material } from \"@babylonjs/core/Materials/material.js\";\nimport { PBRMaterial } from \"@babylonjs/core/Materials/PBR/pbrMaterial.js\";\nimport { Texture } from \"@babylonjs/core/Materials/Textures/texture.js\";\nimport { TransformNode } from \"@babylonjs/core/Meshes/transformNode.js\";\nimport { Buffer, VertexBuffer } from \"@babylonjs/core/Buffers/buffer.js\";\nimport { Geometry } from \"@babylonjs/core/Meshes/geometry.js\";\nimport { AbstractMesh } from \"@babylonjs/core/Meshes/abstractMesh.js\";\nimport { Mesh } from \"@babylonjs/core/Meshes/mesh.js\";\nimport { MorphTarget } from \"@babylonjs/core/Morph/morphTarget.js\";\nimport { MorphTargetManager } from \"@babylonjs/core/Morph/morphTargetManager.js\";\nimport { GLTFFileLoader, GLTFLoaderState, GLTFLoaderCoordinateSystemMode, GLTFLoaderAnimationStartMode } from \"../glTFFileLoader.js\";\nimport { DecodeBase64UrlToBinary, IsBase64DataUrl, LoadFileError } from \"@babylonjs/core/Misc/fileTools.js\";\nimport { Logger } from \"@babylonjs/core/Misc/logger.js\";\nimport { BoundingInfo } from \"@babylonjs/core/Culling/boundingInfo.js\";\nimport { nodeAnimationData } from \"./glTFLoaderAnimation.js\";\n// https://stackoverflow.com/a/48218209\nfunction mergeDeep(...objects) {\n const isObject = (obj) => obj && typeof obj === \"object\";\n return objects.reduce((prev, obj) => {\n Object.keys(obj).forEach((key) => {\n const pVal = prev[key];\n const oVal = obj[key];\n if (Array.isArray(pVal) && Array.isArray(oVal)) {\n prev[key] = pVal.concat(...oVal);\n }\n else if (isObject(pVal) && isObject(oVal)) {\n prev[key] = mergeDeep(pVal, oVal);\n }\n else {\n prev[key] = oVal;\n }\n });\n return prev;\n }, {});\n}\n/**\n * Helper class for working with arrays when loading the glTF asset\n */\nexport class ArrayItem {\n /**\n * Gets an item from the given array.\n * @param context The context when loading the asset\n * @param array The array to get the item from\n * @param index The index to the array\n * @returns The array item\n */\n static Get(context, array, index) {\n if (!array || index == undefined || !array[index]) {\n throw new Error(`${context}: Failed to find index (${index})`);\n }\n return array[index];\n }\n /**\n * Gets an item from the given array or returns null if not available.\n * @param array The array to get the item from\n * @param index The index to the array\n * @returns The array item or null\n */\n static TryGet(array, index) {\n if (!array || index == undefined || !array[index]) {\n return null;\n }\n return array[index];\n }\n /**\n * Assign an `index` field to each item of the given array.\n * @param array The array of items\n */\n static Assign(array) {\n if (array) {\n for (let index = 0; index < array.length; index++) {\n array[index].index = index;\n }\n }\n }\n}\n/**\n * The glTF 2.0 loader\n */\nexport class GLTFLoader {\n /**\n * Registers a loader extension.\n * @param name The name of the loader extension.\n * @param factory The factory function that creates the loader extension.\n */\n static RegisterExtension(name, factory) {\n if (GLTFLoader.UnregisterExtension(name)) {\n Logger.Warn(`Extension with the name '${name}' already exists`);\n }\n GLTFLoader._RegisteredExtensions[name] = {\n factory: factory,\n };\n }\n /**\n * Unregisters a loader extension.\n * @param name The name of the loader extension.\n * @returns A boolean indicating whether the extension has been unregistered\n */\n static UnregisterExtension(name) {\n if (!GLTFLoader._RegisteredExtensions[name]) {\n return false;\n }\n delete GLTFLoader._RegisteredExtensions[name];\n return true;\n }\n /**\n * The object that represents the glTF JSON.\n */\n get gltf() {\n if (!this._gltf) {\n throw new Error(\"glTF JSON is not available\");\n }\n return this._gltf;\n }\n /**\n * The BIN chunk of a binary glTF.\n */\n get bin() {\n return this._bin;\n }\n /**\n * The parent file loader.\n */\n get parent() {\n return this._parent;\n }\n /**\n * The Babylon scene when loading the asset.\n */\n get babylonScene() {\n if (!this._babylonScene) {\n throw new Error(\"Scene is not available\");\n }\n return this._babylonScene;\n }\n /**\n * The root Babylon node when loading the asset.\n */\n get rootBabylonMesh() {\n return this._rootBabylonMesh;\n }\n /**\n * The root url when loading the asset.\n */\n get rootUrl() {\n return this._rootUrl;\n }\n /**\n * @internal\n */\n constructor(parent) {\n /** @internal */\n this._completePromises = new Array();\n /** @internal */\n this._assetContainer = null;\n /** Storage */\n this._babylonLights = [];\n /** @internal */\n this._disableInstancedMesh = 0;\n /** @internal */\n this._allMaterialsDirtyRequired = false;\n this._extensions = new Array();\n this._disposed = false;\n this._rootUrl = null;\n this._fileName = null;\n this._uniqueRootUrl = null;\n this._bin = null;\n this._rootBabylonMesh = null;\n this._defaultBabylonMaterialData = {};\n this._postSceneLoadActions = new Array();\n this._parent = parent;\n }\n /** @internal */\n dispose() {\n if (this._disposed) {\n return;\n }\n this._disposed = true;\n this._completePromises.length = 0;\n this._extensions.forEach((extension) => extension.dispose && extension.dispose());\n this._extensions.length = 0;\n this._gltf = null; // TODO\n this._bin = null;\n this._babylonScene = null; // TODO\n this._rootBabylonMesh = null;\n this._defaultBabylonMaterialData = {};\n this._postSceneLoadActions.length = 0;\n this._parent.dispose();\n }\n /**\n * @internal\n */\n importMeshAsync(meshesNames, scene, container, data, rootUrl, onProgress, fileName = \"\") {\n return Promise.resolve().then(() => {\n this._babylonScene = scene;\n this._assetContainer = container;\n this._loadData(data);\n let nodes = null;\n if (meshesNames) {\n const nodeMap = {};\n if (this._gltf.nodes) {\n for (const node of this._gltf.nodes) {\n if (node.name) {\n nodeMap[node.name] = node.index;\n }\n }\n }\n const names = meshesNames instanceof Array ? meshesNames : [meshesNames];\n nodes = names.map((name) => {\n const node = nodeMap[name];\n if (node === undefined) {\n throw new Error(`Failed to find node '${name}'`);\n }\n return node;\n });\n }\n return this._loadAsync(rootUrl, fileName, nodes, () => {\n return {\n meshes: this._getMeshes(),\n particleSystems: [],\n skeletons: this._getSkeletons(),\n animationGroups: this._getAnimationGroups(),\n lights: this._babylonLights,\n transformNodes: this._getTransformNodes(),\n geometries: this._getGeometries(),\n spriteManagers: [],\n };\n });\n });\n }\n /**\n * @internal\n */\n loadAsync(scene, data, rootUrl, onProgress, fileName = \"\") {\n return Promise.resolve().then(() => {\n this._babylonScene = scene;\n this._loadData(data);\n return this._loadAsync(rootUrl, fileName, null, () => undefined);\n });\n }\n _loadAsync(rootUrl, fileName, nodes, resultFunc) {\n return Promise.resolve()\n .then(() => {\n this._rootUrl = rootUrl;\n this._uniqueRootUrl = !rootUrl.startsWith(\"file:\") && fileName ? rootUrl : `${rootUrl}${Date.now()}/`;\n this._fileName = fileName;\n this._allMaterialsDirtyRequired = false;\n this._loadExtensions();\n this._checkExtensions();\n const loadingToReadyCounterName = `${GLTFLoaderState[GLTFLoaderState.LOADING]} => ${GLTFLoaderState[GLTFLoaderState.READY]}`;\n const loadingToCompleteCounterName = `${GLTFLoaderState[GLTFLoaderState.LOADING]} => ${GLTFLoaderState[GLTFLoaderState.COMPLETE]}`;\n this._parent._startPerformanceCounter(loadingToReadyCounterName);\n this._parent._startPerformanceCounter(loadingToCompleteCounterName);\n this._parent._setState(GLTFLoaderState.LOADING);\n this._extensionsOnLoading();\n const promises = new Array();\n // Block the marking of materials dirty until the scene is loaded.\n const oldBlockMaterialDirtyMechanism = this._babylonScene.blockMaterialDirtyMechanism;\n this._babylonScene.blockMaterialDirtyMechanism = true;\n if (!this.parent.loadOnlyMaterials) {\n if (nodes) {\n promises.push(this.loadSceneAsync(\"/nodes\", { nodes: nodes, index: -1 }));\n }\n else if (this._gltf.scene != undefined || (this._gltf.scenes && this._gltf.scenes[0])) {\n const scene = ArrayItem.Get(`/scene`, this._gltf.scenes, this._gltf.scene || 0);\n promises.push(this.loadSceneAsync(`/scenes/${scene.index}`, scene));\n }\n }\n if (!this.parent.skipMaterials && this.parent.loadAllMaterials && this._gltf.materials) {\n for (let m = 0; m < this._gltf.materials.length; ++m) {\n const material = this._gltf.materials[m];\n const context = \"/materials/\" + m;\n const babylonDrawMode = Material.TriangleFillMode;\n promises.push(this._loadMaterialAsync(context, material, null, babylonDrawMode, () => { }));\n }\n }\n // Restore the blocking of material dirty.\n if (this._allMaterialsDirtyRequired) {\n // This can happen if we add a light for instance as it will impact the whole scene.\n // This automatically resets everything if needed.\n this._babylonScene.blockMaterialDirtyMechanism = oldBlockMaterialDirtyMechanism;\n }\n else {\n // By default a newly created material is dirty so there is no need to flag the full scene as dirty.\n // For perf reasons, we then bypass blockMaterialDirtyMechanism as this would \"dirty\" the entire scene.\n this._babylonScene._forceBlockMaterialDirtyMechanism(oldBlockMaterialDirtyMechanism);\n }\n if (this._parent.compileMaterials) {\n promises.push(this._compileMaterialsAsync());\n }\n if (this._parent.compileShadowGenerators) {\n promises.push(this._compileShadowGeneratorsAsync());\n }\n const resultPromise = Promise.all(promises).then(() => {\n if (this._rootBabylonMesh && this._rootBabylonMesh !== this._parent.customRootNode) {\n this._rootBabylonMesh.setEnabled(true);\n }\n this._extensionsOnReady();\n this._parent._setState(GLTFLoaderState.READY);\n this._startAnimations();\n return resultFunc();\n });\n return resultPromise.then((result) => {\n this._parent._endPerformanceCounter(loadingToReadyCounterName);\n Tools.SetImmediate(() => {\n if (!this._disposed) {\n Promise.all(this._completePromises).then(() => {\n this._parent._endPerformanceCounter(loadingToCompleteCounterName);\n this._parent._setState(GLTFLoaderState.COMPLETE);\n this._parent.onCompleteObservable.notifyObservers(undefined);\n this._parent.onCompleteObservable.clear();\n this.dispose();\n }, (error) => {\n this._parent.onErrorObservable.notifyObservers(error);\n this._parent.onErrorObservable.clear();\n this.dispose();\n });\n }\n });\n return result;\n });\n })\n .catch((error) => {\n if (!this._disposed) {\n this._parent.onErrorObservable.notifyObservers(error);\n this._parent.onErrorObservable.clear();\n this.dispose();\n }\n throw error;\n });\n }\n _loadData(data) {\n this._gltf = data.json;\n this._setupData();\n if (data.bin) {\n const buffers = this._gltf.buffers;\n if (buffers && buffers[0] && !buffers[0].uri) {\n const binaryBuffer = buffers[0];\n if (binaryBuffer.byteLength < data.bin.byteLength - 3 || binaryBuffer.byteLength > data.bin.byteLength) {\n Logger.Warn(`Binary buffer length (${binaryBuffer.byteLength}) from JSON does not match chunk length (${data.bin.byteLength})`);\n }\n this._bin = data.bin;\n }\n else {\n Logger.Warn(\"Unexpected BIN chunk\");\n }\n }\n }\n _setupData() {\n ArrayItem.Assign(this._gltf.accessors);\n ArrayItem.Assign(this._gltf.animations);\n ArrayItem.Assign(this._gltf.buffers);\n ArrayItem.Assign(this._gltf.bufferViews);\n ArrayItem.Assign(this._gltf.cameras);\n ArrayItem.Assign(this._gltf.images);\n ArrayItem.Assign(this._gltf.materials);\n ArrayItem.Assign(this._gltf.meshes);\n ArrayItem.Assign(this._gltf.nodes);\n ArrayItem.Assign(this._gltf.samplers);\n ArrayItem.Assign(this._gltf.scenes);\n ArrayItem.Assign(this._gltf.skins);\n ArrayItem.Assign(this._gltf.textures);\n if (this._gltf.nodes) {\n const nodeParents = {};\n for (const node of this._gltf.nodes) {\n if (node.children) {\n for (const index of node.children) {\n nodeParents[index] = node.index;\n }\n }\n }\n const rootNode = this._createRootNode();\n for (const node of this._gltf.nodes) {\n const parentIndex = nodeParents[node.index];\n node.parent = parentIndex === undefined ? rootNode : this._gltf.nodes[parentIndex];\n }\n }\n }\n _loadExtensions() {\n for (const name in GLTFLoader._RegisteredExtensions) {\n const extension = GLTFLoader._RegisteredExtensions[name].factory(this);\n if (extension.name !== name) {\n Logger.Warn(`The name of the glTF loader extension instance does not match the registered name: ${extension.name} !== ${name}`);\n }\n this._extensions.push(extension);\n this._parent.onExtensionLoadedObservable.notifyObservers(extension);\n }\n this._extensions.sort((a, b) => (a.order || Number.MAX_VALUE) - (b.order || Number.MAX_VALUE));\n this._parent.onExtensionLoadedObservable.clear();\n }\n _checkExtensions() {\n if (this._gltf.extensionsRequired) {\n for (const name of this._gltf.extensionsRequired) {\n const available = this._extensions.some((extension) => extension.name === name && extension.enabled);\n if (!available) {\n throw new Error(`Required extension ${name} is not available`);\n }\n }\n }\n }\n _createRootNode() {\n if (this._parent.customRootNode !== undefined) {\n this._rootBabylonMesh = this._parent.customRootNode;\n return {\n // eslint-disable-next-line @typescript-eslint/naming-convention\n _babylonTransformNode: this._rootBabylonMesh === null ? undefined : this._rootBabylonMesh,\n index: -1,\n };\n }\n this._babylonScene._blockEntityCollection = !!this._assetContainer;\n const rootMesh = new Mesh(\"__root__\", this._babylonScene);\n this._rootBabylonMesh = rootMesh;\n this._rootBabylonMesh._parentContainer = this._assetContainer;\n this._babylonScene._blockEntityCollection = false;\n this._rootBabylonMesh.setEnabled(false);\n const rootNode = {\n // eslint-disable-next-line @typescript-eslint/naming-convention\n _babylonTransformNode: this._rootBabylonMesh,\n index: -1,\n };\n switch (this._parent.coordinateSystemMode) {\n case GLTFLoaderCoordinateSystemMode.AUTO: {\n if (!this._babylonScene.useRightHandedSystem) {\n rootNode.rotation = [0, 1, 0, 0];\n rootNode.scale = [1, 1, -1];\n GLTFLoader._LoadTransform(rootNode, this._rootBabylonMesh);\n }\n break;\n }\n case GLTFLoaderCoordinateSystemMode.FORCE_RIGHT_HANDED: {\n this._babylonScene.useRightHandedSystem = true;\n break;\n }\n default: {\n throw new Error(`Invalid coordinate system mode (${this._parent.coordinateSystemMode})`);\n }\n }\n this._parent.onMeshLoadedObservable.notifyObservers(rootMesh);\n return rootNode;\n }\n /**\n * Loads a glTF scene.\n * @param context The context when loading the asset\n * @param scene The glTF scene property\n * @returns A promise that resolves when the load is complete\n */\n loadSceneAsync(context, scene) {\n const extensionPromise = this._extensionsLoadSceneAsync(context, scene);\n if (extensionPromise) {\n return extensionPromise;\n }\n const promises = new Array();\n this.logOpen(`${context} ${scene.name || \"\"}`);\n if (scene.nodes) {\n for (const index of scene.nodes) {\n const node = ArrayItem.Get(`${context}/nodes/${index}`, this._gltf.nodes, index);\n promises.push(this.loadNodeAsync(`/nodes/${node.index}`, node, (babylonMesh) => {\n babylonMesh.parent = this._rootBabylonMesh;\n }));\n }\n }\n for (const action of this._postSceneLoadActions) {\n action();\n }\n promises.push(this._loadAnimationsAsync());\n this.logClose();\n return Promise.all(promises).then(() => { });\n }\n _forEachPrimitive(node, callback) {\n if (node._primitiveBabylonMeshes) {\n for (const babylonMesh of node._primitiveBabylonMeshes) {\n callback(babylonMesh);\n }\n }\n }\n _getGeometries() {\n const geometries = [];\n const nodes = this._gltf.nodes;\n if (nodes) {\n for (const node of nodes) {\n this._forEachPrimitive(node, (babylonMesh) => {\n const geometry = babylonMesh.geometry;\n if (geometry && geometries.indexOf(geometry) === -1) {\n geometries.push(geometry);\n }\n });\n }\n }\n return geometries;\n }\n _getMeshes() {\n const meshes = [];\n // Root mesh is always first, if available.\n if (this._rootBabylonMesh instanceof AbstractMesh) {\n meshes.push(this._rootBabylonMesh);\n }\n const nodes = this._gltf.nodes;\n if (nodes) {\n for (const node of nodes) {\n this._forEachPrimitive(node, (babylonMesh) => {\n meshes.push(babylonMesh);\n });\n }\n }\n return meshes;\n }\n _getTransformNodes() {\n const transformNodes = [];\n const nodes = this._gltf.nodes;\n if (nodes) {\n for (const node of nodes) {\n if (node._babylonTransformNode && node._babylonTransformNode.getClassName() === \"TransformNode\") {\n transformNodes.push(node._babylonTransformNode);\n }\n if (node._babylonTransformNodeForSkin) {\n transformNodes.push(node._babylonTransformNodeForSkin);\n }\n }\n }\n return transformNodes;\n }\n _getSkeletons() {\n const skeletons = [];\n const skins = this._gltf.skins;\n if (skins) {\n for (const skin of skins) {\n if (skin._data) {\n skeletons.push(skin._data.babylonSkeleton);\n }\n }\n }\n return skeletons;\n }\n _getAnimationGroups() {\n const animationGroups = [];\n const animations = this._gltf.animations;\n if (animations) {\n for (const animation of animations) {\n if (animation._babylonAnimationGroup) {\n animationGroups.push(animation._babylonAnimationGroup);\n }\n }\n }\n return animationGroups;\n }\n _startAnimations() {\n switch (this._parent.animationStartMode) {\n case GLTFLoaderAnimationStartMode.NONE: {\n // do nothing\n break;\n }\n case GLTFLoaderAnimationStartMode.FIRST: {\n const babylonAnimationGroups = this._getAnimationGroups();\n if (babylonAnimationGroups.length !== 0) {\n babylonAnimationGroups[0].start(true);\n }\n break;\n }\n case GLTFLoaderAnimationStartMode.ALL: {\n const babylonAnimationGroups = this._getAnimationGroups();\n for (const babylonAnimationGroup of babylonAnimationGroups) {\n babylonAnimationGroup.start(true);\n }\n break;\n }\n default: {\n Logger.Error(`Invalid animation start mode (${this._parent.animationStartMode})`);\n return;\n }\n }\n }\n /**\n * Loads a glTF node.\n * @param context The context when loading the asset\n * @param node The glTF node property\n * @param assign A function called synchronously after parsing the glTF properties\n * @returns A promise that resolves with the loaded Babylon mesh when the load is complete\n */\n loadNodeAsync(context, node, assign = () => { }) {\n const extensionPromise = this._extensionsLoadNodeAsync(context, node, assign);\n if (extensionPromise) {\n return extensionPromise;\n }\n if (node._babylonTransformNode) {\n throw new Error(`${context}: Invalid recursive node hierarchy`);\n }\n const promises = new Array();\n this.logOpen(`${context} ${node.name || \"\"}`);\n const loadNode = (babylonTransformNode) => {\n GLTFLoader.AddPointerMetadata(babylonTransformNode, context);\n GLTFLoader._LoadTransform(node, babylonTransformNode);\n if (node.camera != undefined) {\n const camera = ArrayItem.Get(`${context}/camera`, this._gltf.cameras, node.camera);\n promises.push(this.loadCameraAsync(`/cameras/${camera.index}`, camera, (babylonCamera) => {\n babylonCamera.parent = babylonTransformNode;\n }));\n }\n if (node.children) {\n for (const index of node.children) {\n const childNode = ArrayItem.Get(`${context}/children/${index}`, this._gltf.nodes, index);\n promises.push(this.loadNodeAsync(`/nodes/${childNode.index}`, childNode, (childBabylonMesh) => {\n childBabylonMesh.parent = babylonTransformNode;\n }));\n }\n }\n assign(babylonTransformNode);\n };\n if (node.mesh == undefined || node.skin != undefined) {\n const nodeName = node.name || `node${node.index}`;\n this._babylonScene._blockEntityCollection = !!this._assetContainer;\n const transformNode = new TransformNode(nodeName, this._babylonScene);\n transformNode._parentContainer = this._assetContainer;\n this._babylonScene._blockEntityCollection = false;\n if (node.mesh == undefined) {\n node._babylonTransformNode = transformNode;\n }\n else {\n node._babylonTransformNodeForSkin = transformNode;\n }\n loadNode(transformNode);\n }\n if (node.mesh != undefined) {\n if (node.skin == undefined) {\n const mesh = ArrayItem.Get(`${context}/mesh`, this._gltf.meshes, node.mesh);\n promises.push(this._loadMeshAsync(`/meshes/${mesh.index}`, node, mesh, loadNode));\n }\n else {\n // See https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#skins (second implementation note)\n // This code path will place the skinned mesh as a sibling of the skeleton root node without loading the\n // transform, which effectively ignores the transform of the skinned mesh, as per spec.\n const mesh = ArrayItem.Get(`${context}/mesh`, this._gltf.meshes, node.mesh);\n promises.push(this._loadMeshAsync(`/meshes/${mesh.index}`, node, mesh, (babylonTransformNode) => {\n const babylonTransformNodeForSkin = node._babylonTransformNodeForSkin;\n // Merge the metadata from the skin node to the skinned mesh in case a loader extension added metadata.\n babylonTransformNode.metadata = mergeDeep(babylonTransformNodeForSkin.metadata, babylonTransformNode.metadata || {});\n const skin = ArrayItem.Get(`${context}/skin`, this._gltf.skins, node.skin);\n promises.push(this._loadSkinAsync(`/skins/${skin.index}`, node, skin, (babylonSkeleton) => {\n this._forEachPrimitive(node, (babylonMesh) => {\n babylonMesh.skeleton = babylonSkeleton;\n });\n // Wait until all the nodes are parented before parenting the skinned mesh.\n this._postSceneLoadActions.push(() => {\n if (skin.skeleton != undefined) {\n // Place the skinned mesh node as a sibling of the skeleton root node.\n // Handle special case when the parent of the skeleton root is the skinned mesh.\n const parentNode = ArrayItem.Get(`/skins/${skin.index}/skeleton`, this._gltf.nodes, skin.skeleton).parent;\n if (node.index === parentNode.index) {\n babylonTransformNode.parent = babylonTransformNodeForSkin.parent;\n }\n else {\n babylonTransformNode.parent = parentNode._babylonTransformNode;\n }\n }\n else {\n babylonTransformNode.parent = this._rootBabylonMesh;\n }\n this._parent.onSkinLoadedObservable.notifyObservers({ node: babylonTransformNodeForSkin, skinnedNode: babylonTransformNode });\n });\n }));\n }));\n }\n }\n this.logClose();\n return Promise.all(promises).then(() => {\n this._forEachPrimitive(node, (babylonMesh) => {\n if (babylonMesh.geometry && babylonMesh.geometry.useBoundingInfoFromGeometry) {\n // simply apply the world matrices to the bounding info - the extends are already ok\n babylonMesh._updateBoundingInfo();\n }\n else {\n babylonMesh.refreshBoundingInfo(true, true);\n }\n });\n return node._babylonTransformNode;\n });\n }\n _loadMeshAsync(context, node, mesh, assign) {\n const primitives = mesh.primitives;\n if (!primitives || !primitives.length) {\n throw new Error(`${context}: Primitives are missing`);\n }\n if (primitives[0].index == undefined) {\n ArrayItem.Assign(primitives);\n }\n const promises = new Array();\n this.logOpen(`${context} ${mesh.name || \"\"}`);\n const name = node.name || `node${node.index}`;\n if (primitives.length === 1) {\n const primitive = mesh.primitives[0];\n promises.push(this._loadMeshPrimitiveAsync(`${context}/primitives/${primitive.index}`, name, node, mesh, primitive, (babylonMesh) => {\n node._babylonTransformNode = babylonMesh;\n node._primitiveBabylonMeshes = [babylonMesh];\n }));\n }\n else {\n this._babylonScene._blockEntityCollection = !!this._assetContainer;\n node._babylonTransformNode = new TransformNode(name, this._babylonScene);\n node._babylonTransformNode._parentContainer = this._assetContainer;\n this._babylonScene._blockEntityCollection = false;\n node._primitiveBabylonMeshes = [];\n for (const primitive of primitives) {\n promises.push(this._loadMeshPrimitiveAsync(`${context}/primitives/${primitive.index}`, `${name}_primitive${primitive.index}`, node, mesh, primitive, (babylonMesh) => {\n babylonMesh.parent = node._babylonTransformNode;\n node._primitiveBabylonMeshes.push(babylonMesh);\n }));\n }\n }\n assign(node._babylonTransformNode);\n this.logClose();\n return Promise.all(promises).then(() => {\n return node._babylonTransformNode;\n });\n }\n /**\n * @internal Define this method to modify the default behavior when loading data for mesh primitives.\n * @param context The context when loading the asset\n * @param name The mesh name when loading the asset\n * @param node The glTF node when loading the asset\n * @param mesh The glTF mesh when loading the asset\n * @param primitive The glTF mesh primitive property\n * @param assign A function called synchronously after parsing the glTF properties\n * @returns A promise that resolves with the loaded mesh when the load is complete or null if not handled\n */\n _loadMeshPrimitiveAsync(context, name, node, mesh, primitive, assign) {\n const extensionPromise = this._extensionsLoadMeshPrimitiveAsync(context, name, node, mesh, primitive, assign);\n if (extensionPromise) {\n return extensionPromise;\n }\n this.logOpen(`${context}`);\n const shouldInstance = this._disableInstancedMesh === 0 && this._parent.createInstances && node.skin == undefined && !mesh.primitives[0].targets;\n let babylonAbstractMesh;\n let promise;\n if (shouldInstance && primitive._instanceData) {\n this._babylonScene._blockEntityCollection = !!this._assetContainer;\n babylonAbstractMesh = primitive._instanceData.babylonSourceMesh.createInstance(name);\n babylonAbstractMesh._parentContainer = this._assetContainer;\n this._babylonScene._blockEntityCollection = false;\n promise = primitive._instanceData.promise;\n }\n else {\n const promises = new Array();\n this._babylonScene._blockEntityCollection = !!this._assetContainer;\n const babylonMesh = new Mesh(name, this._babylonScene);\n babylonMesh._parentContainer = this._assetContainer;\n this._babylonScene._blockEntityCollection = false;\n babylonMesh.overrideMaterialSideOrientation = this._babylonScene.useRightHandedSystem ? Material.CounterClockWiseSideOrientation : Material.ClockWiseSideOrientation;\n this._createMorphTargets(context, node, mesh, primitive, babylonMesh);\n promises.push(this._loadVertexDataAsync(context, primitive, babylonMesh).then((babylonGeometry) => {\n return this._loadMorphTargetsAsync(context, primitive, babylonMesh, babylonGeometry).then(() => {\n if (this._disposed) {\n return;\n }\n this._babylonScene._blockEntityCollection = !!this._assetContainer;\n babylonGeometry.applyToMesh(babylonMesh);\n babylonGeometry._parentContainer = this._assetContainer;\n this._babylonScene._blockEntityCollection = false;\n });\n }));\n const babylonDrawMode = GLTFLoader._GetDrawMode(context, primitive.mode);\n if (primitive.material == undefined) {\n let babylonMaterial = this._defaultBabylonMaterialData[babylonDrawMode];\n if (!babylonMaterial) {\n babylonMaterial = this._createDefaultMaterial(\"__GLTFLoader._default\", babylonDrawMode);\n this._parent.onMaterialLoadedObservable.notifyObservers(babylonMaterial);\n this._defaultBabylonMaterialData[babylonDrawMode] = babylonMaterial;\n }\n babylonMesh.material = babylonMaterial;\n }\n else if (!this.parent.skipMaterials) {\n const material = ArrayItem.Get(`${context}/material`, this._gltf.materials, primitive.material);\n promises.push(this._loadMaterialAsync(`/materials/${material.index}`, material, babylonMesh, babylonDrawMode, (babylonMaterial) => {\n babylonMesh.material = babylonMaterial;\n }));\n }\n promise = Promise.all(promises);\n if (shouldInstance) {\n primitive._instanceData = {\n babylonSourceMesh: babylonMesh,\n promise: promise,\n };\n }\n babylonAbstractMesh = babylonMesh;\n }\n GLTFLoader.AddPointerMetadata(babylonAbstractMesh, context);\n this._parent.onMeshLoadedObservable.notifyObservers(babylonAbstractMesh);\n assign(babylonAbstractMesh);\n this.logClose();\n return promise.then(() => {\n return babylonAbstractMesh;\n });\n }\n _loadVertexDataAsync(context, primitive, babylonMesh) {\n const extensionPromise = this._extensionsLoadVertexDataAsync(context, primitive, babylonMesh);\n if (extensionPromise) {\n return extensionPromise;\n }\n const attributes = primitive.attributes;\n if (!attributes) {\n throw new Error(`${context}: Attributes are missing`);\n }\n const promises = new Array();\n const babylonGeometry = new Geometry(babylonMesh.name, this._babylonScene);\n if (primitive.indices == undefined) {\n babylonMesh.isUnIndexed = true;\n }\n else {\n const accessor = ArrayItem.Get(`${context}/indices`, this._gltf.accessors, primitive.indices);\n promises.push(this._loadIndicesAccessorAsync(`/accessors/${accessor.index}`, accessor).then((data) => {\n babylonGeometry.setIndices(data);\n }));\n }\n const loadAttribute = (name, kind, callback) => {\n if (attributes[name] == undefined) {\n return;\n }\n babylonMesh._delayInfo = babylonMesh._delayInfo || [];\n if (babylonMesh._delayInfo.indexOf(kind) === -1) {\n babylonMesh._delayInfo.push(kind);\n }\n const accessor = ArrayItem.Get(`${context}/attributes/${name}`, this._gltf.accessors, attributes[name]);\n promises.push(this._loadVertexAccessorAsync(`/accessors/${accessor.index}`, accessor, kind).then((babylonVertexBuffer) => {\n if (babylonVertexBuffer.getKind() === VertexBuffer.PositionKind && !this.parent.alwaysComputeBoundingBox && !babylonMesh.skeleton) {\n if (accessor.min && accessor.max) {\n const min = TmpVectors.Vector3[0].copyFromFloats(...accessor.min);\n const max = TmpVectors.Vector3[1].copyFromFloats(...accessor.max);\n if (accessor.normalized && accessor.componentType !== 5126 /* AccessorComponentType.FLOAT */) {\n let divider = 1;\n switch (accessor.componentType) {\n case 5120 /* AccessorComponentType.BYTE */:\n divider = 127.0;\n break;\n case 5121 /* AccessorComponentType.UNSIGNED_BYTE */:\n divider = 255.0;\n break;\n case 5122 /* AccessorComponentType.SHORT */:\n divider = 32767.0;\n break;\n case 5123 /* AccessorComponentType.UNSIGNED_SHORT */:\n divider = 65535.0;\n break;\n }\n const oneOverDivider = 1 / divider;\n min.scaleInPlace(oneOverDivider);\n max.scaleInPlace(oneOverDivider);\n }\n babylonGeometry._boundingInfo = new BoundingInfo(min, max);\n babylonGeometry.useBoundingInfoFromGeometry = true;\n }\n }\n babylonGeometry.setVerticesBuffer(babylonVertexBuffer, accessor.count);\n }));\n if (kind == VertexBuffer.MatricesIndicesExtraKind) {\n babylonMesh.numBoneInfluencers = 8;\n }\n if (callback) {\n callback(accessor);\n }\n };\n loadAttribute(\"POSITION\", VertexBuffer.PositionKind);\n loadAttribute(\"NORMAL\", VertexBuffer.NormalKind);\n loadAttribute(\"TANGENT\", VertexBuffer.TangentKind);\n loadAttribute(\"TEXCOORD_0\", VertexBuffer.UVKind);\n loadAttribute(\"TEXCOORD_1\", VertexBuffer.UV2Kind);\n loadAttribute(\"TEXCOORD_2\", VertexBuffer.UV3Kind);\n loadAttribute(\"TEXCOORD_3\", VertexBuffer.UV4Kind);\n loadAttribute(\"TEXCOORD_4\", VertexBuffer.UV5Kind);\n loadAttribute(\"TEXCOORD_5\", VertexBuffer.UV6Kind);\n loadAttribute(\"JOINTS_0\", VertexBuffer.MatricesIndicesKind);\n loadAttribute(\"WEIGHTS_0\", VertexBuffer.MatricesWeightsKind);\n loadAttribute(\"JOINTS_1\", VertexBuffer.MatricesIndicesExtraKind);\n loadAttribute(\"WEIGHTS_1\", VertexBuffer.MatricesWeightsExtraKind);\n loadAttribute(\"COLOR_0\", VertexBuffer.ColorKind, (accessor) => {\n if (accessor.type === \"VEC4\" /* AccessorType.VEC4 */) {\n babylonMesh.hasVertexAlpha = true;\n }\n });\n return Promise.all(promises).then(() => {\n return babylonGeometry;\n });\n }\n _createMorphTargets(context, node, mesh, primitive, babylonMesh) {\n if (!primitive.targets) {\n return;\n }\n if (node._numMorphTargets == undefined) {\n node._numMorphTargets = primitive.targets.length;\n }\n else if (primitive.targets.length !== node._numMorphTargets) {\n throw new Error(`${context}: Primitives do not have the same number of targets`);\n }\n const targetNames = mesh.extras ? mesh.extras.targetNames : null;\n this._babylonScene._blockEntityCollection = !!this._assetContainer;\n babylonMesh.morphTargetManager = new MorphTargetManager(this._babylonScene);\n babylonMesh.morphTargetManager._parentContainer = this._assetContainer;\n this._babylonScene._blockEntityCollection = false;\n babylonMesh.morphTargetManager.areUpdatesFrozen = true;\n for (let index = 0; index < primitive.targets.length; index++) {\n const weight = node.weights ? node.weights[index] : mesh.weights ? mesh.weights[index] : 0;\n const name = targetNames ? targetNames[index] : `morphTarget${index}`;\n babylonMesh.morphTargetManager.addTarget(new MorphTarget(name, weight, babylonMesh.getScene()));\n // TODO: tell the target whether it has positions, normals, tangents\n }\n }\n _loadMorphTargetsAsync(context, primitive, babylonMesh, babylonGeometry) {\n if (!primitive.targets) {\n return Promise.resolve();\n }\n const promises = new Array();\n const morphTargetManager = babylonMesh.morphTargetManager;\n for (let index = 0; index < morphTargetManager.numTargets; index++) {\n const babylonMorphTarget = morphTargetManager.getTarget(index);\n promises.push(this._loadMorphTargetVertexDataAsync(`${context}/targets/${index}`, babylonGeometry, primitive.targets[index], babylonMorphTarget));\n }\n return Promise.all(promises).then(() => {\n morphTargetManager.areUpdatesFrozen = false;\n });\n }\n _loadMorphTargetVertexDataAsync(context, babylonGeometry, attributes, babylonMorphTarget) {\n const promises = new Array();\n const loadAttribute = (attribute, kind, setData) => {\n if (attributes[attribute] == undefined) {\n return;\n }\n const babylonVertexBuffer = babylonGeometry.getVertexBuffer(kind);\n if (!babylonVertexBuffer) {\n return;\n }\n const accessor = ArrayItem.Get(`${context}/${attribute}`, this._gltf.accessors, attributes[attribute]);\n promises.push(this._loadFloatAccessorAsync(`/accessors/${accessor.index}`, accessor).then((data) => {\n setData(babylonVertexBuffer, data);\n }));\n };\n loadAttribute(\"POSITION\", VertexBuffer.PositionKind, (babylonVertexBuffer, data) => {\n const positions = new Float32Array(data.length);\n babylonVertexBuffer.forEach(data.length, (value, index) => {\n positions[index] = data[index] + value;\n });\n babylonMorphTarget.setPositions(positions);\n });\n loadAttribute(\"NORMAL\", VertexBuffer.NormalKind, (babylonVertexBuffer, data) => {\n const normals = new Float32Array(data.length);\n babylonVertexBuffer.forEach(normals.length, (value, index) => {\n normals[index] = data[index] + value;\n });\n babylonMorphTarget.setNormals(normals);\n });\n loadAttribute(\"TANGENT\", VertexBuffer.TangentKind, (babylonVertexBuffer, data) => {\n const tangents = new Float32Array((data.length / 3) * 4);\n let dataIndex = 0;\n babylonVertexBuffer.forEach((data.length / 3) * 4, (value, index) => {\n // Tangent data for morph targets is stored as xyz delta.\n // The vertexData.tangent is stored as xyzw.\n // So we need to skip every fourth vertexData.tangent.\n if ((index + 1) % 4 !== 0) {\n tangents[dataIndex] = data[dataIndex] + value;\n dataIndex++;\n }\n });\n babylonMorphTarget.setTangents(tangents);\n });\n return Promise.all(promises).then(() => { });\n }\n static _LoadTransform(node, babylonNode) {\n // Ignore the TRS of skinned nodes.\n // See https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#skins (second implementation note)\n if (node.skin != undefined) {\n return;\n }\n let position = Vector3.Zero();\n let rotation = Quaternion.Identity();\n let scaling = Vector3.One();\n if (node.matrix) {\n const matrix = Matrix.FromArray(node.matrix);\n matrix.decompose(scaling, rotation, position);\n }\n else {\n if (node.translation) {\n position = Vector3.FromArray(node.translation);\n }\n if (node.rotation) {\n rotation = Quaternion.FromArray(node.rotation);\n }\n if (node.scale) {\n scaling = Vector3.FromArray(node.scale);\n }\n }\n babylonNode.position = position;\n babylonNode.rotationQuaternion = rotation;\n babylonNode.scaling = scaling;\n }\n _loadSkinAsync(context, node, skin, assign) {\n const extensionPromise = this._extensionsLoadSkinAsync(context, node, skin);\n if (extensionPromise) {\n return extensionPromise;\n }\n if (skin._data) {\n assign(skin._data.babylonSkeleton);\n return skin._data.promise;\n }\n const skeletonId = `skeleton${skin.index}`;\n this._babylonScene._blockEntityCollection = !!this._assetContainer;\n const babylonSkeleton = new Skeleton(skin.name || skeletonId, skeletonId, this._babylonScene);\n babylonSkeleton._parentContainer = this._assetContainer;\n this._babylonScene._blockEntityCollection = false;\n this._loadBones(context, skin, babylonSkeleton);\n const promise = this._loadSkinInverseBindMatricesDataAsync(context, skin).then((inverseBindMatricesData) => {\n this._updateBoneMatrices(babylonSkeleton, inverseBindMatricesData);\n });\n skin._data = {\n babylonSkeleton: babylonSkeleton,\n promise: promise,\n };\n assign(babylonSkeleton);\n return promise;\n }\n _loadBones(context, skin, babylonSkeleton) {\n if (skin.skeleton == undefined || this._parent.alwaysComputeSkeletonRootNode) {\n const rootNode = this._findSkeletonRootNode(`${context}/joints`, skin.joints);\n if (rootNode) {\n if (skin.skeleton === undefined) {\n skin.skeleton = rootNode.index;\n }\n else {\n const isParent = (a, b) => {\n for (; b.parent; b = b.parent) {\n if (b.parent === a) {\n return true;\n }\n }\n return false;\n };\n const skeletonNode = ArrayItem.Get(`${context}/skeleton`, this._gltf.nodes, skin.skeleton);\n if (skeletonNode !== rootNode && !isParent(skeletonNode, rootNode)) {\n Logger.Warn(`${context}/skeleton: Overriding with nearest common ancestor as skeleton node is not a common root`);\n skin.skeleton = rootNode.index;\n }\n }\n }\n else {\n Logger.Warn(`${context}: Failed to find common root`);\n }\n }\n const babylonBones = {};\n for (const index of skin.joints) {\n const node = ArrayItem.Get(`${context}/joints/${index}`, this._gltf.nodes, index);\n this._loadBone(node, skin, babylonSkeleton, babylonBones);\n }\n }\n _findSkeletonRootNode(context, joints) {\n if (joints.length === 0) {\n return null;\n }\n const paths = {};\n for (const index of joints) {\n const path = [];\n let node = ArrayItem.Get(`${context}/${index}`, this._gltf.nodes, index);\n while (node.index !== -1) {\n path.unshift(node);\n node = node.parent;\n }\n paths[index] = path;\n }\n let rootNode = null;\n for (let i = 0;; ++i) {\n let path = paths[joints[0]];\n if (i >= path.length) {\n return rootNode;\n }\n const node = path[i];\n for (let j = 1; j < joints.length; ++j) {\n path = paths[joints[j]];\n if (i >= path.length || node !== path[i]) {\n return rootNode;\n }\n }\n rootNode = node;\n }\n }\n _loadBone(node, skin, babylonSkeleton, babylonBones) {\n let babylonBone = babylonBones[node.index];\n if (babylonBone) {\n return babylonBone;\n }\n let parentBabylonBone = null;\n if (node.index !== skin.skeleton) {\n if (node.parent && node.parent.index !== -1) {\n parentBabylonBone = this._loadBone(node.parent, skin, babylonSkeleton, babylonBones);\n }\n else if (skin.skeleton !== undefined) {\n Logger.Warn(`/skins/${skin.index}/skeleton: Skeleton node is not a common root`);\n }\n }\n const boneIndex = skin.joints.indexOf(node.index);\n babylonBone = new Bone(node.name || `joint${node.index}`, babylonSkeleton, parentBabylonBone, this._getNodeMatrix(node), null, null, boneIndex);\n babylonBones[node.index] = babylonBone;\n // Wait until the scene is loaded to ensure the transform nodes are loaded.\n this._postSceneLoadActions.push(() => {\n // Link the Babylon bone with the corresponding Babylon transform node.\n // A glTF joint is a pointer to a glTF node in the glTF node hierarchy similar to Unity3D.\n babylonBone.linkTransformNode(node._babylonTransformNode);\n });\n return babylonBone;\n }\n _loadSkinInverseBindMatricesDataAsync(context, skin) {\n if (skin.inverseBindMatrices == undefined) {\n return Promise.resolve(null);\n }\n const accessor = ArrayItem.Get(`${context}/inverseBindMatrices`, this._gltf.accessors, skin.inverseBindMatrices);\n return this._loadFloatAccessorAsync(`/accessors/${accessor.index}`, accessor);\n }\n _updateBoneMatrices(babylonSkeleton, inverseBindMatricesData) {\n for (const babylonBone of babylonSkeleton.bones) {\n const baseMatrix = Matrix.Identity();\n const boneIndex = babylonBone._index;\n if (inverseBindMatricesData && boneIndex !== -1) {\n Matrix.FromArrayToRef(inverseBindMatricesData, boneIndex * 16, baseMatrix);\n baseMatrix.invertToRef(baseMatrix);\n }\n const babylonParentBone = babylonBone.getParent();\n if (babylonParentBone) {\n baseMatrix.multiplyToRef(babylonParentBone.getAbsoluteInverseBindMatrix(), baseMatrix);\n }\n babylonBone.updateMatrix(baseMatrix, false, false);\n babylonBone._updateAbsoluteBindMatrices(undefined, false);\n }\n }\n _getNodeMatrix(node) {\n return node.matrix\n ? Matrix.FromArray(node.matrix)\n : Matrix.Compose(node.scale ? Vector3.FromArray(node.scale) : Vector3.One(), node.rotation ? Quaternion.FromArray(node.rotation) : Quaternion.Identity(), node.translation ? Vector3.FromArray(node.translation) : Vector3.Zero());\n }\n /**\n * Loads a glTF camera.\n * @param context The context when loading the asset\n * @param camera The glTF camera property\n * @param assign A function called synchronously after parsing the glTF properties\n * @returns A promise that resolves with the loaded Babylon camera when the load is complete\n */\n loadCameraAsync(context, camera, assign = () => { }) {\n const extensionPromise = this._extensionsLoadCameraAsync(context, camera, assign);\n if (extensionPromise) {\n return extensionPromise;\n }\n const promises = new Array();\n this.logOpen(`${context} ${camera.name || \"\"}`);\n this._babylonScene._blockEntityCollection = !!this._assetContainer;\n const babylonCamera = new FreeCamera(camera.name || `camera${camera.index}`, Vector3.Zero(), this._babylonScene, false);\n babylonCamera._parentContainer = this._assetContainer;\n this._babylonScene._blockEntityCollection = false;\n babylonCamera.ignoreParentScaling = true;\n camera._babylonCamera = babylonCamera;\n // Rotation by 180 as glTF has a different convention than Babylon.\n babylonCamera.rotation.set(0, Math.PI, 0);\n switch (camera.type) {\n case \"perspective\" /* CameraType.PERSPECTIVE */: {\n const perspective = camera.perspective;\n if (!perspective) {\n throw new Error(`${context}: Camera perspective properties are missing`);\n }\n babylonCamera.fov = perspective.yfov;\n babylonCamera.minZ = perspective.znear;\n babylonCamera.maxZ = perspective.zfar || 0;\n break;\n }\n case \"orthographic\" /* CameraType.ORTHOGRAPHIC */: {\n if (!camera.orthographic) {\n throw new Error(`${context}: Camera orthographic properties are missing`);\n }\n babylonCamera.mode = Camera.ORTHOGRAPHIC_CAMERA;\n babylonCamera.orthoLeft = -camera.orthographic.xmag;\n babylonCamera.orthoRight = camera.orthographic.xmag;\n babylonCamera.orthoBottom = -camera.orthographic.ymag;\n babylonCamera.orthoTop = camera.orthographic.ymag;\n babylonCamera.minZ = camera.orthographic.znear;\n babylonCamera.maxZ = camera.orthographic.zfar;\n break;\n }\n default: {\n throw new Error(`${context}: Invalid camera type (${camera.type})`);\n }\n }\n GLTFLoader.AddPointerMetadata(babylonCamera, context);\n this._parent.onCameraLoadedObservable.notifyObservers(babylonCamera);\n assign(babylonCamera);\n this.logClose();\n return Promise.all(promises).then(() => {\n return babylonCamera;\n });\n }\n _loadAnimationsAsync() {\n const animations = this._gltf.animations;\n if (!animations) {\n return Promise.resolve();\n }\n const promises = new Array();\n for (let index = 0; index < animations.length; index++) {\n const animation = animations[index];\n promises.push(this.loadAnimationAsync(`/animations/${animation.index}`, animation).then((animationGroup) => {\n // Delete the animation group if it ended up not having any animations in it.\n if (animationGroup.targetedAnimations.length === 0) {\n animationGroup.dispose();\n }\n }));\n }\n return Promise.all(promises).then(() => { });\n }\n /**\n * Loads a glTF animation.\n * @param context The context when loading the asset\n * @param animation The glTF animation property\n * @returns A promise that resolves with the loaded Babylon animation group when the load is complete\n */\n loadAnimationAsync(context, animation) {\n const promise = this._extensionsLoadAnimationAsync(context, animation);\n if (promise) {\n return promise;\n }\n this._babylonScene._blockEntityCollection = !!this._assetContainer;\n const babylonAnimationGroup = new AnimationGroup(animation.name || `animation${animation.index}`, this._babylonScene);\n babylonAnimationGroup._parentContainer = this._assetContainer;\n this._babylonScene._blockEntityCollection = false;\n animation._babylonAnimationGroup = babylonAnimationGroup;\n const promises = new Array();\n ArrayItem.Assign(animation.channels);\n ArrayItem.Assign(animation.samplers);\n for (const channel of animation.channels) {\n promises.push(this._loadAnimationChannelAsync(`${context}/channels/${channel.index}`, context, animation, channel, (babylonTarget, babylonAnimation) => {\n babylonTarget.animations = babylonTarget.animations || [];\n babylonTarget.animations.push(babylonAnimation);\n babylonAnimationGroup.addTargetedAnimation(babylonAnimation, babylonTarget);\n }));\n }\n return Promise.all(promises).then(() => {\n babylonAnimationGroup.normalize(0);\n return babylonAnimationGroup;\n });\n }\n /**\n * @hidden\n * Loads a glTF animation channel.\n * @param context The context when loading the asset\n * @param animationContext The context of the animation when loading the asset\n * @param animation The glTF animation property\n * @param channel The glTF animation channel property\n * @param onLoad Called for each animation loaded\n * @returns A void promise that resolves when the load is complete\n */\n _loadAnimationChannelAsync(context, animationContext, animation, channel, onLoad) {\n const promise = this._extensionsLoadAnimationChannelAsync(context, animationContext, animation, channel, onLoad);\n if (promise) {\n return promise;\n }\n if (channel.target.node == undefined) {\n return Promise.resolve();\n }\n const targetNode = ArrayItem.Get(`${context}/target/node`, this._gltf.nodes, channel.target.node);\n // Ignore animations that have no animation targets.\n if ((channel.target.path === \"weights\" /* AnimationChannelTargetPath.WEIGHTS */ && !targetNode._numMorphTargets) ||\n (channel.target.path !== \"weights\" /* AnimationChannelTargetPath.WEIGHTS */ && !targetNode._babylonTransformNode)) {\n return Promise.resolve();\n }\n let properties;\n switch (channel.target.path) {\n case \"translation\" /* AnimationChannelTargetPath.TRANSLATION */: {\n properties = nodeAnimationData.translation;\n break;\n }\n case \"rotation\" /* AnimationChannelTargetPath.ROTATION */: {\n properties = nodeAnimationData.rotation;\n break;\n }\n case \"scale\" /* AnimationChannelTargetPath.SCALE */: {\n properties = nodeAnimationData.scale;\n break;\n }\n case \"weights\" /* AnimationChannelTargetPath.WEIGHTS */: {\n properties = nodeAnimationData.weights;\n break;\n }\n default: {\n throw new Error(`${context}/target/path: Invalid value (${channel.target.path})`);\n }\n }\n const targetInfo = {\n object: targetNode,\n info: properties,\n };\n return this._loadAnimationChannelFromTargetInfoAsync(context, animationContext, animation, channel, targetInfo, onLoad);\n }\n /**\n * @hidden\n * Loads a glTF animation channel.\n * @param context The context when loading the asset\n * @param animationContext The context of the animation when loading the asset\n * @param animation The glTF animation property\n * @param channel The glTF animation channel property\n * @param targetInfo The glTF target and properties\n * @param onLoad Called for each animation loaded\n * @returns A void promise that resolves when the load is complete\n */\n _loadAnimationChannelFromTargetInfoAsync(context, animationContext, animation, channel, targetInfo, onLoad) {\n const fps = this.parent.targetFps;\n const invfps = 1 / fps;\n const sampler = ArrayItem.Get(`${context}/sampler`, animation.samplers, channel.sampler);\n return this._loadAnimationSamplerAsync(`${animationContext}/samplers/${channel.sampler}`, sampler).then((data) => {\n let numAnimations = 0;\n const target = targetInfo.object;\n const propertyInfos = targetInfo.info;\n // Extract the corresponding values from the read value.\n // GLTF values may be dispatched to several Babylon properties.\n // For example, baseColorFactor [`r`, `g`, `b`, `a`] is dispatched to\n // - albedoColor as Color3(`r`, `g`, `b`)\n // - alpha as `a`\n for (const propertyInfo of propertyInfos) {\n const stride = propertyInfo.getStride(target);\n const input = data.input;\n const output = data.output;\n const keys = new Array(input.length);\n let outputOffset = 0;\n switch (data.interpolation) {\n case \"STEP\" /* AnimationSamplerInterpolation.STEP */: {\n for (let index = 0; index < input.length; index++) {\n const value = propertyInfo.getValue(target, output, outputOffset, 1);\n outputOffset += stride;\n keys[index] = {\n frame: input[index] * fps,\n value: value,\n interpolation: AnimationKeyInterpolation.STEP,\n };\n }\n break;\n }\n case \"CUBICSPLINE\" /* AnimationSamplerInterpolation.CUBICSPLINE */: {\n for (let index = 0; index < input.length; index++) {\n const inTangent = propertyInfo.getValue(target, output, outputOffset, invfps);\n outputOffset += stride;\n const value = propertyInfo.getValue(target, output, outputOffset, 1);\n outputOffset += stride;\n const outTangent = propertyInfo.getValue(target, output, outputOffset, invfps);\n outputOffset += stride;\n keys[index] = {\n frame: input[index] * fps,\n inTangent: inTangent,\n value: value,\n outTangent: outTangent,\n };\n }\n break;\n }\n case \"LINEAR\" /* AnimationSamplerInterpolation.LINEAR */: {\n for (let index = 0; index < input.length; index++) {\n const value = propertyInfo.getValue(target, output, outputOffset, 1);\n outputOffset += stride;\n keys[index] = {\n frame: input[index] * fps,\n value: value,\n };\n }\n break;\n }\n }\n if (outputOffset > 0) {\n const name = `${animation.name || `animation${animation.index}`}_channel${channel.index}_${numAnimations}`;\n propertyInfo.buildAnimations(target, name, fps, keys, (babylonAnimatable, babylonAnimation) => {\n ++numAnimations;\n onLoad(babylonAnimatable, babylonAnimation);\n });\n }\n }\n });\n }\n _loadAnimationSamplerAsync(context, sampler) {\n if (sampler._data) {\n return sampler._data;\n }\n const interpolation = sampler.interpolation || \"LINEAR\" /* AnimationSamplerInterpolation.LINEAR */;\n switch (interpolation) {\n case \"STEP\" /* AnimationSamplerInterpolation.STEP */:\n case \"LINEAR\" /* AnimationSamplerInterpolation.LINEAR */:\n case \"CUBICSPLINE\" /* AnimationSamplerInterpolation.CUBICSPLINE */: {\n break;\n }\n default: {\n throw new Error(`${context}/interpolation: Invalid value (${sampler.interpolation})`);\n }\n }\n const inputAccessor = ArrayItem.Get(`${context}/input`, this._gltf.accessors, sampler.input);\n const outputAccessor = ArrayItem.Get(`${context}/output`, this._gltf.accessors, sampler.output);\n sampler._data = Promise.all([\n this._loadFloatAccessorAsync(`/accessors/${inputAccessor.index}`, inputAccessor),\n this._loadFloatAccessorAsync(`/accessors/${outputAccessor.index}`, outputAccessor),\n ]).then(([inputData, outputData]) => {\n return {\n input: inputData,\n interpolation: interpolation,\n output: outputData,\n };\n });\n return sampler._data;\n }\n /**\n * Loads a glTF buffer.\n * @param context The context when loading the asset\n * @param buffer The glTF buffer property\n * @param byteOffset The byte offset to use\n * @param byteLength The byte length to use\n * @returns A promise that resolves with the loaded data when the load is complete\n */\n loadBufferAsync(context, buffer, byteOffset, byteLength) {\n const extensionPromise = this._extensionsLoadBufferAsync(context, buffer, byteOffset, byteLength);\n if (extensionPromise) {\n return extensionPromise;\n }\n if (!buffer._data) {\n if (buffer.uri) {\n buffer._data = this.loadUriAsync(`${context}/uri`, buffer, buffer.uri);\n }\n else {\n if (!this._bin) {\n throw new Error(`${context}: Uri is missing or the binary glTF is missing its binary chunk`);\n }\n buffer._data = this._bin.readAsync(0, buffer.byteLength);\n }\n }\n return buffer._data.then((data) => {\n try {\n return new Uint8Array(data.buffer, data.byteOffset + byteOffset, byteLength);\n }\n catch (e) {\n throw new Error(`${context}: ${e.message}`);\n }\n });\n }\n /**\n * Loads a glTF buffer view.\n * @param context The context when loading the asset\n * @param bufferView The glTF buffer view property\n * @returns A promise that resolves with the loaded data when the load is complete\n */\n loadBufferViewAsync(context, bufferView) {\n const extensionPromise = this._extensionsLoadBufferViewAsync(context, bufferView);\n if (extensionPromise) {\n return extensionPromise;\n }\n if (bufferView._data) {\n return bufferView._data;\n }\n const buffer = ArrayItem.Get(`${context}/buffer`, this._gltf.buffers, bufferView.buffer);\n bufferView._data = this.loadBufferAsync(`/buffers/${buffer.index}`, buffer, bufferView.byteOffset || 0, bufferView.byteLength);\n return bufferView._data;\n }\n _loadAccessorAsync(context, accessor, constructor) {\n if (accessor._data) {\n return accessor._data;\n }\n const numComponents = GLTFLoader._GetNumComponents(context, accessor.type);\n const byteStride = numComponents * VertexBuffer.GetTypeByteLength(accessor.componentType);\n const length = numComponents * accessor.count;\n if (accessor.bufferView == undefined) {\n accessor._data = Promise.resolve(new constructor(length));\n }\n else {\n const bufferView = ArrayItem.Get(`${context}/bufferView`, this._gltf.bufferViews, accessor.bufferView);\n accessor._data = this.loadBufferViewAsync(`/bufferViews/${bufferView.index}`, bufferView).then((data) => {\n if (accessor.componentType === 5126 /* AccessorComponentType.FLOAT */ && !accessor.normalized && (!bufferView.byteStride || bufferView.byteStride === byteStride)) {\n return GLTFLoader._GetTypedArray(context, accessor.componentType, data, accessor.byteOffset, length);\n }\n else {\n const typedArray = new constructor(length);\n VertexBuffer.ForEach(data, accessor.byteOffset || 0, bufferView.byteStride || byteStride, numComponents, accessor.componentType, typedArray.length, accessor.normalized || false, (value, index) => {\n typedArray[index] = value;\n });\n return typedArray;\n }\n });\n }\n if (accessor.sparse) {\n const sparse = accessor.sparse;\n accessor._data = accessor._data.then((data) => {\n const typedArray = data;\n const indicesBufferView = ArrayItem.Get(`${context}/sparse/indices/bufferView`, this._gltf.bufferViews, sparse.indices.bufferView);\n const valuesBufferView = ArrayItem.Get(`${context}/sparse/values/bufferView`, this._gltf.bufferViews, sparse.values.bufferView);\n return Promise.all([\n this.loadBufferViewAsync(`/bufferViews/${indicesBufferView.index}`, indicesBufferView),\n this.loadBufferViewAsync(`/bufferViews/${valuesBufferView.index}`, valuesBufferView),\n ]).then(([indicesData, valuesData]) => {\n const indices = GLTFLoader._GetTypedArray(`${context}/sparse/indices`, sparse.indices.componentType, indicesData, sparse.indices.byteOffset, sparse.count);\n const sparseLength = numComponents * sparse.count;\n let values;\n if (accessor.componentType === 5126 /* AccessorComponentType.FLOAT */ && !accessor.normalized) {\n values = GLTFLoader._GetTypedArray(`${context}/sparse/values`, accessor.componentType, valuesData, sparse.values.byteOffset, sparseLength);\n }\n else {\n const sparseData = GLTFLoader._GetTypedArray(`${context}/sparse/values`, accessor.componentType, valuesData, sparse.values.byteOffset, sparseLength);\n values = new constructor(sparseLength);\n VertexBuffer.ForEach(sparseData, 0, byteStride, numComponents, accessor.componentType, values.length, accessor.normalized || false, (value, index) => {\n values[index] = value;\n });\n }\n let valuesIndex = 0;\n for (let indicesIndex = 0; indicesIndex < indices.length; indicesIndex++) {\n let dataIndex = indices[indicesIndex] * numComponents;\n for (let componentIndex = 0; componentIndex < numComponents; componentIndex++) {\n typedArray[dataIndex++] = values[valuesIndex++];\n }\n }\n return typedArray;\n });\n });\n }\n return accessor._data;\n }\n /**\n * @internal\n */\n _loadFloatAccessorAsync(context, accessor) {\n return this._loadAccessorAsync(context, accessor, Float32Array);\n }\n /**\n * @internal\n */\n _loadIndicesAccessorAsync(context, accessor) {\n if (accessor.type !== \"SCALAR\" /* AccessorType.SCALAR */) {\n throw new Error(`${context}/type: Invalid value ${accessor.type}`);\n }\n if (accessor.componentType !== 5121 /* AccessorComponentType.UNSIGNED_BYTE */ &&\n accessor.componentType !== 5123 /* AccessorComponentType.UNSIGNED_SHORT */ &&\n accessor.componentType !== 5125 /* AccessorComponentType.UNSIGNED_INT */) {\n throw new Error(`${context}/componentType: Invalid value ${accessor.componentType}`);\n }\n if (accessor._data) {\n return accessor._data;\n }\n if (accessor.sparse) {\n const constructor = GLTFLoader._GetTypedArrayConstructor(`${context}/componentType`, accessor.componentType);\n accessor._data = this._loadAccessorAsync(context, accessor, constructor);\n }\n else {\n const bufferView = ArrayItem.Get(`${context}/bufferView`, this._gltf.bufferViews, accessor.bufferView);\n accessor._data = this.loadBufferViewAsync(`/bufferViews/${bufferView.index}`, bufferView).then((data) => {\n return GLTFLoader._GetTypedArray(context, accessor.componentType, data, accessor.byteOffset, accessor.count);\n });\n }\n return accessor._data;\n }\n /**\n * @internal\n */\n _loadVertexBufferViewAsync(bufferView) {\n if (bufferView._babylonBuffer) {\n return bufferView._babylonBuffer;\n }\n const engine = this._babylonScene.getEngine();\n bufferView._babylonBuffer = this.loadBufferViewAsync(`/bufferViews/${bufferView.index}`, bufferView).then((data) => {\n return new Buffer(engine, data, false);\n });\n return bufferView._babylonBuffer;\n }\n /**\n * @internal\n */\n _loadVertexAccessorAsync(context, accessor, kind) {\n if (accessor._babylonVertexBuffer?.[kind]) {\n return accessor._babylonVertexBuffer[kind];\n }\n if (!accessor._babylonVertexBuffer) {\n accessor._babylonVertexBuffer = {};\n }\n const engine = this._babylonScene.getEngine();\n if (accessor.sparse || accessor.bufferView == undefined) {\n accessor._babylonVertexBuffer[kind] = this._loadFloatAccessorAsync(context, accessor).then((data) => {\n return new VertexBuffer(engine, data, kind, false);\n });\n }\n else {\n const bufferView = ArrayItem.Get(`${context}/bufferView`, this._gltf.bufferViews, accessor.bufferView);\n accessor._babylonVertexBuffer[kind] = this._loadVertexBufferViewAsync(bufferView).then((babylonBuffer) => {\n const numComponents = GLTFLoader._GetNumComponents(context, accessor.type);\n return new VertexBuffer(engine, babylonBuffer, kind, false, undefined, bufferView.byteStride, undefined, accessor.byteOffset, numComponents, accessor.componentType, accessor.normalized, true, undefined, true);\n });\n }\n return accessor._babylonVertexBuffer[kind];\n }\n _loadMaterialMetallicRoughnessPropertiesAsync(context, properties, babylonMaterial) {\n if (!(babylonMaterial instanceof PBRMaterial)) {\n throw new Error(`${context}: Material type not supported`);\n }\n const promises = new Array();\n if (properties) {\n if (properties.baseColorFactor) {\n babylonMaterial.albedoColor = Color3.FromArray(properties.baseColorFactor);\n babylonMaterial.alpha = properties.baseColorFactor[3];\n }\n else {\n babylonMaterial.albedoColor = Color3.White();\n }\n babylonMaterial.metallic = properties.metallicFactor == undefined ? 1 : properties.metallicFactor;\n babylonMaterial.roughness = properties.roughnessFactor == undefined ? 1 : properties.roughnessFactor;\n if (properties.baseColorTexture) {\n promises.push(this.loadTextureInfoAsync(`${context}/baseColorTexture`, properties.baseColorTexture, (texture) => {\n texture.name = `${babylonMaterial.name} (Base Color)`;\n babylonMaterial.albedoTexture = texture;\n }));\n }\n if (properties.metallicRoughnessTexture) {\n properties.metallicRoughnessTexture.nonColorData = true;\n promises.push(this.loadTextureInfoAsync(`${context}/metallicRoughnessTexture`, properties.metallicRoughnessTexture, (texture) => {\n texture.name = `${babylonMaterial.name} (Metallic Roughness)`;\n babylonMaterial.metallicTexture = texture;\n }));\n babylonMaterial.useMetallnessFromMetallicTextureBlue = true;\n babylonMaterial.useRoughnessFromMetallicTextureGreen = true;\n babylonMaterial.useRoughnessFromMetallicTextureAlpha = false;\n }\n }\n return Promise.all(promises).then(() => { });\n }\n /**\n * @internal\n */\n _loadMaterialAsync(context, material, babylonMesh, babylonDrawMode, assign = () => { }) {\n const extensionPromise = this._extensionsLoadMaterialAsync(context, material, babylonMesh, babylonDrawMode, assign);\n if (extensionPromise) {\n return extensionPromise;\n }\n material._data = material._data || {};\n let babylonData = material._data[babylonDrawMode];\n if (!babylonData) {\n this.logOpen(`${context} ${material.name || \"\"}`);\n const babylonMaterial = this.createMaterial(context, material, babylonDrawMode);\n babylonData = {\n babylonMaterial: babylonMaterial,\n babylonMeshes: [],\n promise: this.loadMaterialPropertiesAsync(context, material, babylonMaterial),\n };\n material._data[babylonDrawMode] = babylonData;\n GLTFLoader.AddPointerMetadata(babylonMaterial, context);\n this._parent.onMaterialLoadedObservable.notifyObservers(babylonMaterial);\n this.logClose();\n }\n if (babylonMesh) {\n babylonData.babylonMeshes.push(babylonMesh);\n babylonMesh.onDisposeObservable.addOnce(() => {\n const index = babylonData.babylonMeshes.indexOf(babylonMesh);\n if (index !== -1) {\n babylonData.babylonMeshes.splice(index, 1);\n }\n });\n }\n assign(babylonData.babylonMaterial);\n return babylonData.promise.then(() => {\n return babylonData.babylonMaterial;\n });\n }\n _createDefaultMaterial(name, babylonDrawMode) {\n this._babylonScene._blockEntityCollection = !!this._assetContainer;\n const babylonMaterial = new PBRMaterial(name, this._babylonScene);\n babylonMaterial._parentContainer = this._assetContainer;\n this._babylonScene._blockEntityCollection = false;\n // Moved to mesh so user can change materials on gltf meshes: babylonMaterial.sideOrientation = this._babylonScene.useRightHandedSystem ? Material.CounterClockWiseSideOrientation : Material.ClockWiseSideOrientation;\n babylonMaterial.fillMode = babylonDrawMode;\n babylonMaterial.enableSpecularAntiAliasing = true;\n babylonMaterial.useRadianceOverAlpha = !this._parent.transparencyAsCoverage;\n babylonMaterial.useSpecularOverAlpha = !this._parent.transparencyAsCoverage;\n babylonMaterial.transparencyMode = PBRMaterial.PBRMATERIAL_OPAQUE;\n babylonMaterial.metallic = 1;\n babylonMaterial.roughness = 1;\n return babylonMaterial;\n }\n /**\n * Creates a Babylon material from a glTF material.\n * @param context The context when loading the asset\n * @param material The glTF material property\n * @param babylonDrawMode The draw mode for the Babylon material\n * @returns The Babylon material\n */\n createMaterial(context, material, babylonDrawMode) {\n const extensionPromise = this._extensionsCreateMaterial(context, material, babylonDrawMode);\n if (extensionPromise) {\n return extensionPromise;\n }\n const name = material.name || `material${material.index}`;\n const babylonMaterial = this._createDefaultMaterial(name, babylonDrawMode);\n return babylonMaterial;\n }\n /**\n * Loads properties from a glTF material into a Babylon material.\n * @param context The context when loading the asset\n * @param material The glTF material property\n * @param babylonMaterial The Babylon material\n * @returns A promise that resolves when the load is complete\n */\n loadMaterialPropertiesAsync(context, material, babylonMaterial) {\n const extensionPromise = this._extensionsLoadMaterialPropertiesAsync(context, material, babylonMaterial);\n if (extensionPromise) {\n return extensionPromise;\n }\n const promises = new Array();\n promises.push(this.loadMaterialBasePropertiesAsync(context, material, babylonMaterial));\n if (material.pbrMetallicRoughness) {\n promises.push(this._loadMaterialMetallicRoughnessPropertiesAsync(`${context}/pbrMetallicRoughness`, material.pbrMetallicRoughness, babylonMaterial));\n }\n this.loadMaterialAlphaProperties(context, material, babylonMaterial);\n return Promise.all(promises).then(() => { });\n }\n /**\n * Loads the normal, occlusion, and emissive properties from a glTF material into a Babylon material.\n * @param context The context when loading the asset\n * @param material The glTF material property\n * @param babylonMaterial The Babylon material\n * @returns A promise that resolves when the load is complete\n */\n loadMaterialBasePropertiesAsync(context, material, babylonMaterial) {\n if (!(babylonMaterial instanceof PBRMaterial)) {\n throw new Error(`${context}: Material type not supported`);\n }\n const promises = new Array();\n babylonMaterial.emissiveColor = material.emissiveFactor ? Color3.FromArray(material.emissiveFactor) : new Color3(0, 0, 0);\n if (material.doubleSided) {\n babylonMaterial.backFaceCulling = false;\n babylonMaterial.twoSidedLighting = true;\n }\n if (material.normalTexture) {\n material.normalTexture.nonColorData = true;\n promises.push(this.loadTextureInfoAsync(`${context}/normalTexture`, material.normalTexture, (texture) => {\n texture.name = `${babylonMaterial.name} (Normal)`;\n babylonMaterial.bumpTexture = texture;\n }));\n babylonMaterial.invertNormalMapX = !this._babylonScene.useRightHandedSystem;\n babylonMaterial.invertNormalMapY = this._babylonScene.useRightHandedSystem;\n if (material.normalTexture.scale != undefined && babylonMaterial.bumpTexture) {\n babylonMaterial.bumpTexture.level = material.normalTexture.scale;\n }\n babylonMaterial.forceIrradianceInFragment = true;\n }\n if (material.occlusionTexture) {\n material.occlusionTexture.nonColorData = true;\n promises.push(this.loadTextureInfoAsync(`${context}/occlusionTexture`, material.occlusionTexture, (texture) => {\n texture.name = `${babylonMaterial.name} (Occlusion)`;\n babylonMaterial.ambientTexture = texture;\n }));\n babylonMaterial.useAmbientInGrayScale = true;\n if (material.occlusionTexture.strength != undefined) {\n babylonMaterial.ambientTextureStrength = material.occlusionTexture.strength;\n }\n }\n if (material.emissiveTexture) {\n promises.push(this.loadTextureInfoAsync(`${context}/emissiveTexture`, material.emissiveTexture, (texture) => {\n texture.name = `${babylonMaterial.name} (Emissive)`;\n babylonMaterial.emissiveTexture = texture;\n }));\n }\n return Promise.all(promises).then(() => { });\n }\n /**\n * Loads the alpha properties from a glTF material into a Babylon material.\n * Must be called after the setting the albedo texture of the Babylon material when the material has an albedo texture.\n * @param context The context when loading the asset\n * @param material The glTF material property\n * @param babylonMaterial The Babylon material\n */\n loadMaterialAlphaProperties(context, material, babylonMaterial) {\n if (!(babylonMaterial instanceof PBRMaterial)) {\n throw new Error(`${context}: Material type not supported`);\n }\n const alphaMode = material.alphaMode || \"OPAQUE\" /* MaterialAlphaMode.OPAQUE */;\n switch (alphaMode) {\n case \"OPAQUE\" /* MaterialAlphaMode.OPAQUE */: {\n babylonMaterial.transparencyMode = PBRMaterial.PBRMATERIAL_OPAQUE;\n babylonMaterial.alpha = 1.0; // Force alpha to 1.0 for opaque mode.\n break;\n }\n case \"MASK\" /* MaterialAlphaMode.MASK */: {\n babylonMaterial.transparencyMode = PBRMaterial.PBRMATERIAL_ALPHATEST;\n babylonMaterial.alphaCutOff = material.alphaCutoff == undefined ? 0.5 : material.alphaCutoff;\n if (babylonMaterial.albedoTexture) {\n babylonMaterial.albedoTexture.hasAlpha = true;\n }\n break;\n }\n case \"BLEND\" /* MaterialAlphaMode.BLEND */: {\n babylonMaterial.transparencyMode = PBRMaterial.PBRMATERIAL_ALPHABLEND;\n if (babylonMaterial.albedoTexture) {\n babylonMaterial.albedoTexture.hasAlpha = true;\n babylonMaterial.useAlphaFromAlbedoTexture = true;\n }\n break;\n }\n default: {\n throw new Error(`${context}/alphaMode: Invalid value (${material.alphaMode})`);\n }\n }\n }\n /**\n * Loads a glTF texture info.\n * @param context The context when loading the asset\n * @param textureInfo The glTF texture info property\n * @param assign A function called synchronously after parsing the glTF properties\n * @returns A promise that resolves with the loaded Babylon texture when the load is complete\n */\n loadTextureInfoAsync(context, textureInfo, assign = () => { }) {\n const extensionPromise = this._extensionsLoadTextureInfoAsync(context, textureInfo, assign);\n if (extensionPromise) {\n return extensionPromise;\n }\n this.logOpen(`${context}`);\n if (textureInfo.texCoord >= 6) {\n throw new Error(`${context}/texCoord: Invalid value (${textureInfo.texCoord})`);\n }\n const texture = ArrayItem.Get(`${context}/index`, this._gltf.textures, textureInfo.index);\n texture._textureInfo = textureInfo;\n const promise = this._loadTextureAsync(`/textures/${textureInfo.index}`, texture, (babylonTexture) => {\n babylonTexture.coordinatesIndex = textureInfo.texCoord || 0;\n GLTFLoader.AddPointerMetadata(babylonTexture, context);\n this._parent.onTextureLoadedObservable.notifyObservers(babylonTexture);\n assign(babylonTexture);\n });\n this.logClose();\n return promise;\n }\n /**\n * @internal\n */\n _loadTextureAsync(context, texture, assign = () => { }) {\n const extensionPromise = this._extensionsLoadTextureAsync(context, texture, assign);\n if (extensionPromise) {\n return extensionPromise;\n }\n this.logOpen(`${context} ${texture.name || \"\"}`);\n const sampler = texture.sampler == undefined ? GLTFLoader.DefaultSampler : ArrayItem.Get(`${context}/sampler`, this._gltf.samplers, texture.sampler);\n const image = ArrayItem.Get(`${context}/source`, this._gltf.images, texture.source);\n const promise = this._createTextureAsync(context, sampler, image, assign, undefined, !texture._textureInfo.nonColorData);\n this.logClose();\n return promise;\n }\n /**\n * @internal\n */\n _createTextureAsync(context, sampler, image, assign = () => { }, textureLoaderOptions, useSRGBBuffer) {\n const samplerData = this._loadSampler(`/samplers/${sampler.index}`, sampler);\n const promises = new Array();\n const deferred = new Deferred();\n this._babylonScene._blockEntityCollection = !!this._assetContainer;\n const textureCreationOptions = {\n noMipmap: samplerData.noMipMaps,\n invertY: false,\n samplingMode: samplerData.samplingMode,\n onLoad: () => {\n if (!this._disposed) {\n deferred.resolve();\n }\n },\n onError: (message, exception) => {\n if (!this._disposed) {\n deferred.reject(new Error(`${context}: ${exception && exception.message ? exception.message : message || \"Failed to load texture\"}`));\n }\n },\n mimeType: image.mimeType,\n loaderOptions: textureLoaderOptions,\n useSRGBBuffer: !!useSRGBBuffer && this._parent.useSRGBBuffers,\n };\n const babylonTexture = new Texture(null, this._babylonScene, textureCreationOptions);\n babylonTexture._parentContainer = this._assetContainer;\n this._babylonScene._blockEntityCollection = false;\n promises.push(deferred.promise);\n promises.push(this.loadImageAsync(`/images/${image.index}`, image).then((data) => {\n const name = image.uri || `${this._fileName}#image${image.index}`;\n const dataUrl = `data:${this._uniqueRootUrl}${name}`;\n babylonTexture.updateURL(dataUrl, data);\n }));\n babylonTexture.wrapU = samplerData.wrapU;\n babylonTexture.wrapV = samplerData.wrapV;\n assign(babylonTexture);\n return Promise.all(promises).then(() => {\n return babylonTexture;\n });\n }\n _loadSampler(context, sampler) {\n if (!sampler._data) {\n sampler._data = {\n noMipMaps: sampler.minFilter === 9728 /* TextureMinFilter.NEAREST */ || sampler.minFilter === 9729 /* TextureMinFilter.LINEAR */,\n samplingMode: GLTFLoader._GetTextureSamplingMode(context, sampler),\n wrapU: GLTFLoader._GetTextureWrapMode(`${context}/wrapS`, sampler.wrapS),\n wrapV: GLTFLoader._GetTextureWrapMode(`${context}/wrapT`, sampler.wrapT),\n };\n }\n return sampler._data;\n }\n /**\n * Loads a glTF image.\n * @param context The context when loading the asset\n * @param image The glTF image property\n * @returns A promise that resolves with the loaded data when the load is complete\n */\n loadImageAsync(context, image) {\n if (!image._data) {\n this.logOpen(`${context} ${image.name || \"\"}`);\n if (image.uri) {\n image._data = this.loadUriAsync(`${context}/uri`, image, image.uri);\n }\n else {\n const bufferView = ArrayItem.Get(`${context}/bufferView`, this._gltf.bufferViews, image.bufferView);\n image._data = this.loadBufferViewAsync(`/bufferViews/${bufferView.index}`, bufferView);\n }\n this.logClose();\n }\n return image._data;\n }\n /**\n * Loads a glTF uri.\n * @param context The context when loading the asset\n * @param property The glTF property associated with the uri\n * @param uri The base64 or relative uri\n * @returns A promise that resolves with the loaded data when the load is complete\n */\n loadUriAsync(context, property, uri) {\n const extensionPromise = this._extensionsLoadUriAsync(context, property, uri);\n if (extensionPromise) {\n return extensionPromise;\n }\n if (!GLTFLoader._ValidateUri(uri)) {\n throw new Error(`${context}: '${uri}' is invalid`);\n }\n if (IsBase64DataUrl(uri)) {\n const data = new Uint8Array(DecodeBase64UrlToBinary(uri));\n this.log(`${context}: Decoded ${uri.substr(0, 64)}... (${data.length} bytes)`);\n return Promise.resolve(data);\n }\n this.log(`${context}: Loading ${uri}`);\n return this._parent.preprocessUrlAsync(this._rootUrl + uri).then((url) => {\n return new Promise((resolve, reject) => {\n this._parent._loadFile(this._babylonScene, url, (data) => {\n if (!this._disposed) {\n this.log(`${context}: Loaded ${uri} (${data.byteLength} bytes)`);\n resolve(new Uint8Array(data));\n }\n }, true, (request) => {\n reject(new LoadFileError(`${context}: Failed to load '${uri}'${request ? \": \" + request.status + \" \" + request.statusText : \"\"}`, request));\n });\n });\n });\n }\n /**\n * Adds a JSON pointer to the _internalMetadata of the Babylon object at `<object>._internalMetadata.gltf.pointers`.\n * @param babylonObject the Babylon object with _internalMetadata\n * @param pointer the JSON pointer\n */\n static AddPointerMetadata(babylonObject, pointer) {\n babylonObject.metadata = babylonObject.metadata || {};\n const metadata = (babylonObject._internalMetadata = babylonObject._internalMetadata || {});\n const gltf = (metadata.gltf = metadata.gltf || {});\n const pointers = (gltf.pointers = gltf.pointers || []);\n pointers.push(pointer);\n }\n static _GetTextureWrapMode(context, mode) {\n // Set defaults if undefined\n mode = mode == undefined ? 10497 /* TextureWrapMode.REPEAT */ : mode;\n switch (mode) {\n case 33071 /* TextureWrapMode.CLAMP_TO_EDGE */:\n return Texture.CLAMP_ADDRESSMODE;\n case 33648 /* TextureWrapMode.MIRRORED_REPEAT */:\n return Texture.MIRROR_ADDRESSMODE;\n case 10497 /* TextureWrapMode.REPEAT */:\n return Texture.WRAP_ADDRESSMODE;\n default:\n Logger.Warn(`${context}: Invalid value (${mode})`);\n return Texture.WRAP_ADDRESSMODE;\n }\n }\n static _GetTextureSamplingMode(context, sampler) {\n // Set defaults if undefined\n const magFilter = sampler.magFilter == undefined ? 9729 /* TextureMagFilter.LINEAR */ : sampler.magFilter;\n const minFilter = sampler.minFilter == undefined ? 9987 /* TextureMinFilter.LINEAR_MIPMAP_LINEAR */ : sampler.minFilter;\n if (magFilter === 9729 /* TextureMagFilter.LINEAR */) {\n switch (minFilter) {\n case 9728 /* TextureMinFilter.NEAREST */:\n return Texture.LINEAR_NEAREST;\n case 9729 /* TextureMinFilter.LINEAR */:\n return Texture.LINEAR_LINEAR;\n case 9984 /* TextureMinFilter.NEAREST_MIPMAP_NEAREST */:\n return Texture.LINEAR_NEAREST_MIPNEAREST;\n case 9985 /* TextureMinFilter.LINEAR_MIPMAP_NEAREST */:\n return Texture.LINEAR_LINEAR_MIPNEAREST;\n case 9986 /* TextureMinFilter.NEAREST_MIPMAP_LINEAR */:\n return Texture.LINEAR_NEAREST_MIPLINEAR;\n case 9987 /* TextureMinFilter.LINEAR_MIPMAP_LINEAR */:\n return Texture.LINEAR_LINEAR_MIPLINEAR;\n default:\n Logger.Warn(`${context}/minFilter: Invalid value (${minFilter})`);\n return Texture.LINEAR_LINEAR_MIPLINEAR;\n }\n }\n else {\n if (magFilter !== 9728 /* TextureMagFilter.NEAREST */) {\n Logger.Warn(`${context}/magFilter: Invalid value (${magFilter})`);\n }\n switch (minFilter) {\n case 9728 /* TextureMinFilter.NEAREST */:\n return Texture.NEAREST_NEAREST;\n case 9729 /* TextureMinFilter.LINEAR */:\n return Texture.NEAREST_LINEAR;\n case 9984 /* TextureMinFilter.NEAREST_MIPMAP_NEAREST */:\n return Texture.NEAREST_NEAREST_MIPNEAREST;\n case 9985 /* TextureMinFilter.LINEAR_MIPMAP_NEAREST */:\n return Texture.NEAREST_LINEAR_MIPNEAREST;\n case 9986 /* TextureMinFilter.NEAREST_MIPMAP_LINEAR */:\n return Texture.NEAREST_NEAREST_MIPLINEAR;\n case 9987 /* TextureMinFilter.LINEAR_MIPMAP_LINEAR */:\n return Texture.NEAREST_LINEAR_MIPLINEAR;\n default:\n Logger.Warn(`${context}/minFilter: Invalid value (${minFilter})`);\n return Texture.NEAREST_NEAREST_MIPNEAREST;\n }\n }\n }\n static _GetTypedArrayConstructor(context, componentType) {\n switch (componentType) {\n case 5120 /* AccessorComponentType.BYTE */:\n return Int8Array;\n case 5121 /* AccessorComponentType.UNSIGNED_BYTE */:\n return Uint8Array;\n case 5122 /* AccessorComponentType.SHORT */:\n return Int16Array;\n case 5123 /* AccessorComponentType.UNSIGNED_SHORT */:\n return Uint16Array;\n case 5125 /* AccessorComponentType.UNSIGNED_INT */:\n return Uint32Array;\n case 5126 /* AccessorComponentType.FLOAT */:\n return Float32Array;\n default:\n throw new Error(`${context}: Invalid component type ${componentType}`);\n }\n }\n static _GetTypedArray(context, componentType, bufferView, byteOffset, length) {\n const buffer = bufferView.buffer;\n byteOffset = bufferView.byteOffset + (byteOffset || 0);\n const constructor = GLTFLoader._GetTypedArrayConstructor(`${context}/componentType`, componentType);\n const componentTypeLength = VertexBuffer.GetTypeByteLength(componentType);\n if (byteOffset % componentTypeLength !== 0) {\n // HACK: Copy the buffer if byte offset is not a multiple of component type byte length.\n Logger.Warn(`${context}: Copying buffer as byte offset (${byteOffset}) is not a multiple of component type byte length (${componentTypeLength})`);\n return new constructor(buffer.slice(byteOffset, byteOffset + length * componentTypeLength), 0);\n }\n return new constructor(buffer, byteOffset, length);\n }\n static _GetNumComponents(context, type) {\n switch (type) {\n case \"SCALAR\":\n return 1;\n case \"VEC2\":\n return 2;\n case \"VEC3\":\n return 3;\n case \"VEC4\":\n return 4;\n case \"MAT2\":\n return 4;\n case \"MAT3\":\n return 9;\n case \"MAT4\":\n return 16;\n }\n throw new Error(`${context}: Invalid type (${type})`);\n }\n static _ValidateUri(uri) {\n return Tools.IsBase64(uri) || uri.indexOf(\"..\") === -1;\n }\n /**\n * @internal\n */\n static _GetDrawMode(context, mode) {\n if (mode == undefined) {\n mode = 4 /* MeshPrimitiveMode.TRIANGLES */;\n }\n switch (mode) {\n case 0 /* MeshPrimitiveMode.POINTS */:\n return Material.PointListDrawMode;\n case 1 /* MeshPrimitiveMode.LINES */:\n return Material.LineListDrawMode;\n case 2 /* MeshPrimitiveMode.LINE_LOOP */:\n return Material.LineLoopDrawMode;\n case 3 /* MeshPrimitiveMode.LINE_STRIP */:\n return Material.LineStripDrawMode;\n case 4 /* MeshPrimitiveMode.TRIANGLES */:\n return Material.TriangleFillMode;\n case 5 /* MeshPrimitiveMode.TRIANGLE_STRIP */:\n return Material.TriangleStripDrawMode;\n case 6 /* MeshPrimitiveMode.TRIANGLE_FAN */:\n return Material.TriangleFanDrawMode;\n }\n throw new Error(`${context}: Invalid mesh primitive mode (${mode})`);\n }\n _compileMaterialsAsync() {\n this._parent._startPerformanceCounter(\"Compile materials\");\n const promises = new Array();\n if (this._gltf.materials) {\n for (const material of this._gltf.materials) {\n if (material._data) {\n for (const babylonDrawMode in material._data) {\n const babylonData = material._data[babylonDrawMode];\n for (const babylonMesh of babylonData.babylonMeshes) {\n // Ensure nonUniformScaling is set if necessary.\n babylonMesh.computeWorldMatrix(true);\n const babylonMaterial = babylonData.babylonMaterial;\n promises.push(babylonMaterial.forceCompilationAsync(babylonMesh));\n promises.push(babylonMaterial.forceCompilationAsync(babylonMesh, { useInstances: true }));\n if (this._parent.useClipPlane) {\n promises.push(babylonMaterial.forceCompilationAsync(babylonMesh, { clipPlane: true }));\n promises.push(babylonMaterial.forceCompilationAsync(babylonMesh, { clipPlane: true, useInstances: true }));\n }\n }\n }\n }\n }\n }\n return Promise.all(promises).then(() => {\n this._parent._endPerformanceCounter(\"Compile materials\");\n });\n }\n _compileShadowGeneratorsAsync() {\n this._parent._startPerformanceCounter(\"Compile shadow generators\");\n const promises = new Array();\n const lights = this._babylonScene.lights;\n for (const light of lights) {\n const generator = light.getShadowGenerator();\n if (generator) {\n promises.push(generator.forceCompilationAsync());\n }\n }\n return Promise.all(promises).then(() => {\n this._parent._endPerformanceCounter(\"Compile shadow generators\");\n });\n }\n _forEachExtensions(action) {\n for (const extension of this._extensions) {\n if (extension.enabled) {\n action(extension);\n }\n }\n }\n _applyExtensions(property, functionName, actionAsync) {\n for (const extension of this._extensions) {\n if (extension.enabled) {\n const id = `${extension.name}.${functionName}`;\n const loaderProperty = property;\n loaderProperty._activeLoaderExtensionFunctions = loaderProperty._activeLoaderExtensionFunctions || {};\n const activeLoaderExtensionFunctions = loaderProperty._activeLoaderExtensionFunctions;\n if (!activeLoaderExtensionFunctions[id]) {\n activeLoaderExtensionFunctions[id] = true;\n try {\n const result = actionAsync(extension);\n if (result) {\n return result;\n }\n }\n finally {\n delete activeLoaderExtensionFunctions[id];\n }\n }\n }\n }\n return null;\n }\n _extensionsOnLoading() {\n this._forEachExtensions((extension) => extension.onLoading && extension.onLoading());\n }\n _extensionsOnReady() {\n this._forEachExtensions((extension) => extension.onReady && extension.onReady());\n }\n _extensionsLoadSceneAsync(context, scene) {\n return this._applyExtensions(scene, \"loadScene\", (extension) => extension.loadSceneAsync && extension.loadSceneAsync(context, scene));\n }\n _extensionsLoadNodeAsync(context, node, assign) {\n return this._applyExtensions(node, \"loadNode\", (extension) => extension.loadNodeAsync && extension.loadNodeAsync(context, node, assign));\n }\n _extensionsLoadCameraAsync(context, camera, assign) {\n return this._applyExtensions(camera, \"loadCamera\", (extension) => extension.loadCameraAsync && extension.loadCameraAsync(context, camera, assign));\n }\n _extensionsLoadVertexDataAsync(context, primitive, babylonMesh) {\n return this._applyExtensions(primitive, \"loadVertexData\", (extension) => extension._loadVertexDataAsync && extension._loadVertexDataAsync(context, primitive, babylonMesh));\n }\n _extensionsLoadMeshPrimitiveAsync(context, name, node, mesh, primitive, assign) {\n return this._applyExtensions(primitive, \"loadMeshPrimitive\", (extension) => extension._loadMeshPrimitiveAsync && extension._loadMeshPrimitiveAsync(context, name, node, mesh, primitive, assign));\n }\n _extensionsLoadMaterialAsync(context, material, babylonMesh, babylonDrawMode, assign) {\n return this._applyExtensions(material, \"loadMaterial\", (extension) => extension._loadMaterialAsync && extension._loadMaterialAsync(context, material, babylonMesh, babylonDrawMode, assign));\n }\n _extensionsCreateMaterial(context, material, babylonDrawMode) {\n return this._applyExtensions(material, \"createMaterial\", (extension) => extension.createMaterial && extension.createMaterial(context, material, babylonDrawMode));\n }\n _extensionsLoadMaterialPropertiesAsync(context, material, babylonMaterial) {\n return this._applyExtensions(material, \"loadMaterialProperties\", (extension) => extension.loadMaterialPropertiesAsync && extension.loadMaterialPropertiesAsync(context, material, babylonMaterial));\n }\n _extensionsLoadTextureInfoAsync(context, textureInfo, assign) {\n return this._applyExtensions(textureInfo, \"loadTextureInfo\", (extension) => extension.loadTextureInfoAsync && extension.loadTextureInfoAsync(context, textureInfo, assign));\n }\n _extensionsLoadTextureAsync(context, texture, assign) {\n return this._applyExtensions(texture, \"loadTexture\", (extension) => extension._loadTextureAsync && extension._loadTextureAsync(context, texture, assign));\n }\n _extensionsLoadAnimationAsync(context, animation) {\n return this._applyExtensions(animation, \"loadAnimation\", (extension) => extension.loadAnimationAsync && extension.loadAnimationAsync(context, animation));\n }\n _extensionsLoadAnimationChannelAsync(context, animationContext, animation, channel, onLoad) {\n return this._applyExtensions(animation, \"loadAnimationChannel\", (extension) => extension._loadAnimationChannelAsync && extension._loadAnimationChannelAsync(context, animationContext, animation, channel, onLoad));\n }\n _extensionsLoadSkinAsync(context, node, skin) {\n return this._applyExtensions(skin, \"loadSkin\", (extension) => extension._loadSkinAsync && extension._loadSkinAsync(context, node, skin));\n }\n _extensionsLoadUriAsync(context, property, uri) {\n return this._applyExtensions(property, \"loadUri\", (extension) => extension._loadUriAsync && extension._loadUriAsync(context, property, uri));\n }\n _extensionsLoadBufferViewAsync(context, bufferView) {\n return this._applyExtensions(bufferView, \"loadBufferView\", (extension) => extension.loadBufferViewAsync && extension.loadBufferViewAsync(context, bufferView));\n }\n _extensionsLoadBufferAsync(context, buffer, byteOffset, byteLength) {\n return this._applyExtensions(buffer, \"loadBuffer\", (extension) => extension.loadBufferAsync && extension.loadBufferAsync(context, buffer, byteOffset, byteLength));\n }\n /**\n * Helper method called by a loader extension to load an glTF extension.\n * @param context The context when loading the asset\n * @param property The glTF property to load the extension from\n * @param extensionName The name of the extension to load\n * @param actionAsync The action to run\n * @returns The promise returned by actionAsync or null if the extension does not exist\n */\n static LoadExtensionAsync(context, property, extensionName, actionAsync) {\n if (!property.extensions) {\n return null;\n }\n const extensions = property.extensions;\n const extension = extensions[extensionName];\n if (!extension) {\n return null;\n }\n return actionAsync(`${context}/extensions/${extensionName}`, extension);\n }\n /**\n * Helper method called by a loader extension to load a glTF extra.\n * @param context The context when loading the asset\n * @param property The glTF property to load the extra from\n * @param extensionName The name of the extension to load\n * @param actionAsync The action to run\n * @returns The promise returned by actionAsync or null if the extra does not exist\n */\n static LoadExtraAsync(context, property, extensionName, actionAsync) {\n if (!property.extras) {\n return null;\n }\n const extras = property.extras;\n const extra = extras[extensionName];\n if (!extra) {\n return null;\n }\n return actionAsync(`${context}/extras/${extensionName}`, extra);\n }\n /**\n * Checks for presence of an extension.\n * @param name The name of the extension to check\n * @returns A boolean indicating the presence of the given extension name in `extensionsUsed`\n */\n isExtensionUsed(name) {\n return !!this._gltf.extensionsUsed && this._gltf.extensionsUsed.indexOf(name) !== -1;\n }\n /**\n * Increments the indentation level and logs a message.\n * @param message The message to log\n */\n logOpen(message) {\n this._parent._logOpen(message);\n }\n /**\n * Decrements the indentation level.\n */\n logClose() {\n this._parent._logClose();\n }\n /**\n * Logs a message\n * @param message The message to log\n */\n log(message) {\n 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