| 1 |
- {"ast":null,"code":"import { DracoCompression } from \"@babylonjs/core/Meshes/Compression/dracoCompression.js\";\nimport { VertexBuffer } from \"@babylonjs/core/Buffers/buffer.js\";\nimport { GLTFLoader, ArrayItem } from \"../glTFLoader.js\";\nconst NAME = \"KHR_draco_mesh_compression\";\n/**\n * [Specification](https://github.com/KhronosGroup/glTF/blob/main/extensions/2.0/Khronos/KHR_draco_mesh_compression/README.md)\n */\n// eslint-disable-next-line @typescript-eslint/naming-convention\nexport class KHR_draco_mesh_compression {\n /**\n * @internal\n */\n constructor(loader) {\n /**\n * The name of this extension.\n */\n this.name = NAME;\n /**\n * Defines whether to use the normalized flag from the glTF accessor instead of the Draco data. Defaults to true.\n */\n this.useNormalizedFlagFromAccessor = true;\n this._loader = loader;\n this.enabled = DracoCompression.DecoderAvailable && this._loader.isExtensionUsed(NAME);\n }\n /** @internal */\n dispose() {\n delete this.dracoCompression;\n this._loader = null;\n }\n /**\n * @internal\n */\n _loadVertexDataAsync(context, primitive, babylonMesh) {\n return GLTFLoader.LoadExtensionAsync(context, primitive, this.name, (extensionContext, extension) => {\n if (primitive.mode != undefined) {\n if (primitive.mode !== 4 /* MeshPrimitiveMode.TRIANGLES */ && primitive.mode !== 5 /* MeshPrimitiveMode.TRIANGLE_STRIP */) {\n throw new Error(`${context}: Unsupported mode ${primitive.mode}`);\n }\n }\n const attributes = {};\n const normalized = {};\n const loadAttribute = (name, kind) => {\n const uniqueId = extension.attributes[name];\n if (uniqueId == undefined) {\n return;\n }\n babylonMesh._delayInfo = babylonMesh._delayInfo || [];\n if (babylonMesh._delayInfo.indexOf(kind) === -1) {\n babylonMesh._delayInfo.push(kind);\n }\n attributes[kind] = uniqueId;\n if (this.useNormalizedFlagFromAccessor) {\n const accessor = ArrayItem.TryGet(this._loader.gltf.accessors, primitive.attributes[name]);\n if (accessor) {\n normalized[kind] = accessor.normalized || false;\n }\n }\n };\n loadAttribute(\"POSITION\", VertexBuffer.PositionKind);\n loadAttribute(\"NORMAL\", VertexBuffer.NormalKind);\n loadAttribute(\"TANGENT\", VertexBuffer.TangentKind);\n loadAttribute(\"TEXCOORD_0\", VertexBuffer.UVKind);\n loadAttribute(\"TEXCOORD_1\", VertexBuffer.UV2Kind);\n loadAttribute(\"TEXCOORD_2\", VertexBuffer.UV3Kind);\n loadAttribute(\"TEXCOORD_3\", VertexBuffer.UV4Kind);\n loadAttribute(\"TEXCOORD_4\", VertexBuffer.UV5Kind);\n loadAttribute(\"TEXCOORD_5\", VertexBuffer.UV6Kind);\n loadAttribute(\"JOINTS_0\", VertexBuffer.MatricesIndicesKind);\n loadAttribute(\"WEIGHTS_0\", VertexBuffer.MatricesWeightsKind);\n loadAttribute(\"COLOR_0\", VertexBuffer.ColorKind);\n const bufferView = ArrayItem.Get(extensionContext, this._loader.gltf.bufferViews, extension.bufferView);\n if (!bufferView._dracoBabylonGeometry) {\n bufferView._dracoBabylonGeometry = this._loader.loadBufferViewAsync(`/bufferViews/${bufferView.index}`, bufferView).then(data => {\n const dracoCompression = this.dracoCompression || DracoCompression.Default;\n return dracoCompression._decodeMeshToGeometryForGltfAsync(babylonMesh.name, this._loader.babylonScene, data, attributes, normalized).catch(error => {\n throw new Error(`${context}: ${error.message}`);\n });\n });\n }\n return bufferView._dracoBabylonGeometry;\n });\n }\n}\nGLTFLoader.RegisterExtension(NAME, loader => new KHR_draco_mesh_compression(loader));","map":{"version":3,"names":["DracoCompression","VertexBuffer","GLTFLoader","ArrayItem","NAME","KHR_draco_mesh_compression","constructor","loader","name","useNormalizedFlagFromAccessor","_loader","enabled","DecoderAvailable","isExtensionUsed","dispose","dracoCompression","_loadVertexDataAsync","context","primitive","babylonMesh","LoadExtensionAsync","extensionContext","extension","mode","undefined","Error","attributes","normalized","loadAttribute","kind","uniqueId","_delayInfo","indexOf","push","accessor","TryGet","gltf","accessors","PositionKind","NormalKind","TangentKind","UVKind","UV2Kind","UV3Kind","UV4Kind","UV5Kind","UV6Kind","MatricesIndicesKind","MatricesWeightsKind","ColorKind","bufferView","Get","bufferViews","_dracoBabylonGeometry","loadBufferViewAsync","index","then","data","Default","_decodeMeshToGeometryForGltfAsync","babylonScene","catch","error","message","RegisterExtension"],"sources":["F:/workspace/202226701027/huinongbao-app/node_modules/@babylonjs/loaders/glTF/2.0/Extensions/KHR_draco_mesh_compression.js"],"sourcesContent":["import { DracoCompression } from \"@babylonjs/core/Meshes/Compression/dracoCompression.js\";\nimport { VertexBuffer } from \"@babylonjs/core/Buffers/buffer.js\";\nimport { GLTFLoader, ArrayItem } from \"../glTFLoader.js\";\nconst NAME = \"KHR_draco_mesh_compression\";\n/**\n * [Specification](https://github.com/KhronosGroup/glTF/blob/main/extensions/2.0/Khronos/KHR_draco_mesh_compression/README.md)\n */\n// eslint-disable-next-line @typescript-eslint/naming-convention\nexport class KHR_draco_mesh_compression {\n /**\n * @internal\n */\n constructor(loader) {\n /**\n * The name of this extension.\n */\n this.name = NAME;\n /**\n * Defines whether to use the normalized flag from the glTF accessor instead of the Draco data. Defaults to true.\n */\n this.useNormalizedFlagFromAccessor = true;\n this._loader = loader;\n this.enabled = DracoCompression.DecoderAvailable && this._loader.isExtensionUsed(NAME);\n }\n /** @internal */\n dispose() {\n delete this.dracoCompression;\n this._loader = null;\n }\n /**\n * @internal\n */\n _loadVertexDataAsync(context, primitive, babylonMesh) {\n return GLTFLoader.LoadExtensionAsync(context, primitive, this.name, (extensionContext, extension) => {\n if (primitive.mode != undefined) {\n if (primitive.mode !== 4 /* MeshPrimitiveMode.TRIANGLES */ && primitive.mode !== 5 /* MeshPrimitiveMode.TRIANGLE_STRIP */) {\n throw new Error(`${context}: Unsupported mode ${primitive.mode}`);\n }\n }\n const attributes = {};\n const normalized = {};\n const loadAttribute = (name, kind) => {\n const uniqueId = extension.attributes[name];\n if (uniqueId == undefined) {\n return;\n }\n babylonMesh._delayInfo = babylonMesh._delayInfo || [];\n if (babylonMesh._delayInfo.indexOf(kind) === -1) {\n babylonMesh._delayInfo.push(kind);\n }\n attributes[kind] = uniqueId;\n if (this.useNormalizedFlagFromAccessor) {\n const accessor = ArrayItem.TryGet(this._loader.gltf.accessors, primitive.attributes[name]);\n if (accessor) {\n normalized[kind] = accessor.normalized || false;\n }\n }\n };\n loadAttribute(\"POSITION\", VertexBuffer.PositionKind);\n loadAttribute(\"NORMAL\", VertexBuffer.NormalKind);\n loadAttribute(\"TANGENT\", VertexBuffer.TangentKind);\n loadAttribute(\"TEXCOORD_0\", VertexBuffer.UVKind);\n loadAttribute(\"TEXCOORD_1\", VertexBuffer.UV2Kind);\n loadAttribute(\"TEXCOORD_2\", VertexBuffer.UV3Kind);\n loadAttribute(\"TEXCOORD_3\", VertexBuffer.UV4Kind);\n loadAttribute(\"TEXCOORD_4\", VertexBuffer.UV5Kind);\n loadAttribute(\"TEXCOORD_5\", VertexBuffer.UV6Kind);\n loadAttribute(\"JOINTS_0\", VertexBuffer.MatricesIndicesKind);\n loadAttribute(\"WEIGHTS_0\", VertexBuffer.MatricesWeightsKind);\n loadAttribute(\"COLOR_0\", VertexBuffer.ColorKind);\n const bufferView = ArrayItem.Get(extensionContext, this._loader.gltf.bufferViews, extension.bufferView);\n if (!bufferView._dracoBabylonGeometry) {\n bufferView._dracoBabylonGeometry = this._loader.loadBufferViewAsync(`/bufferViews/${bufferView.index}`, bufferView).then((data) => {\n const dracoCompression = this.dracoCompression || DracoCompression.Default;\n return dracoCompression._decodeMeshToGeometryForGltfAsync(babylonMesh.name, this._loader.babylonScene, data, attributes, normalized).catch((error) => {\n throw new Error(`${context}: ${error.message}`);\n });\n });\n }\n return bufferView._dracoBabylonGeometry;\n });\n }\n}\nGLTFLoader.RegisterExtension(NAME, (loader) => new 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|
