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{ Nullable } from \"@babylonjs/core/types\";\nimport { Color3 } from \"@babylonjs/core/Maths/math\";\nimport { PBRMaterial } from \"@babylonjs/core/Materials/PBR/pbrMaterial\";\nimport { Material } from \"@babylonjs/core/Materials/material\";\n\nimport { ITextureInfo, IMaterial } from \"../glTFLoaderInterfaces\";\nimport { IGLTFLoaderExtension } from \"../glTFLoaderExtension\";\nimport { GLTFLoader } from \"../glTFLoader\";\n\nconst NAME = \"KHR_materials_pbrSpecularGlossiness\";\n\ninterface IKHRMaterialsPbrSpecularGlossiness {\n diffuseFactor: number[];\n diffuseTexture: ITextureInfo;\n specularFactor: number[];\n glossinessFactor: number;\n specularGlossinessTexture: ITextureInfo;\n}\n\n/**\n * [Specification](https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_materials_pbrSpecularGlossiness)\n */\nexport class KHR_materials_pbrSpecularGlossiness implements IGLTFLoaderExtension {\n /** The name of this extension. */\n public readonly name = NAME;\n\n /** Defines whether this extension is enabled. */\n public enabled = true;\n\n private _loader: GLTFLoader;\n\n /** @hidden */\n constructor(loader: GLTFLoader) {\n this._loader = loader;\n }\n\n /** @hidden */\n public dispose() {\n delete this._loader;\n }\n\n /** @hidden */\n public loadMaterialPropertiesAsync(context: string, material: IMaterial, babylonMaterial: Material): Nullable<Promise<void>> {\n return GLTFLoader.LoadExtensionAsync<IKHRMaterialsPbrSpecularGlossiness>(context, material, this.name, (extensionContext, extension) => {\n const promises = new Array<Promise<any>>();\n promises.push(this._loader.loadMaterialBasePropertiesAsync(context, material, babylonMaterial));\n promises.push(this._loadSpecularGlossinessPropertiesAsync(extensionContext, material, extension, babylonMaterial));\n this._loader.loadMaterialAlphaProperties(context, material, babylonMaterial);\n return Promise.all(promises).then(() => { });\n });\n }\n\n private _loadSpecularGlossinessPropertiesAsync(context: string, material: IMaterial, properties: IKHRMaterialsPbrSpecularGlossiness, babylonMaterial: Material): Promise<void> {\n if (!(babylonMaterial instanceof PBRMaterial)) {\n throw new Error(`${context}: Material type not supported`);\n }\n\n const promises = new Array<Promise<any>>();\n\n babylonMaterial.metallic = null;\n babylonMaterial.roughness = null;\n\n if (properties.diffuseFactor) {\n babylonMaterial.albedoColor = Color3.FromArray(properties.diffuseFactor);\n babylonMaterial.alpha = properties.diffuseFactor[3];\n }\n else {\n babylonMaterial.albedoColor = Color3.White();\n }\n\n babylonMaterial.reflectivityColor = properties.specularFactor ? Color3.FromArray(properties.specularFactor) : Color3.White();\n babylonMaterial.microSurface = properties.glossinessFactor == undefined ? 1 : properties.glossinessFactor;\n\n if (properties.diffuseTexture) {\n promises.push(this._loader.loadTextureInfoAsync(`${context}/diffuseTexture`, properties.diffuseTexture, (texture) => {\n texture.name = `${babylonMaterial.name} (Diffuse)`;\n babylonMaterial.albedoTexture = texture;\n }));\n }\n\n if (properties.specularGlossinessTexture) {\n promises.push(this._loader.loadTextureInfoAsync(`${context}/specularGlossinessTexture`, properties.specularGlossinessTexture, (texture) => {\n texture.name = `${babylonMaterial.name} (Specular Glossiness)`;\n babylonMaterial.reflectivityTexture = texture;\n }));\n\n babylonMaterial.reflectivityTexture.hasAlpha = true;\n babylonMaterial.useMicroSurfaceFromReflectivityMapAlpha = true;\n }\n\n return Promise.all(promises).then(() => { });\n }\n}\n\nGLTFLoader.RegisterExtension(NAME, (loader) => new KHR_materials_pbrSpecularGlossiness(loader));"]} |