| 1 | 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{ Nullable } from \"@babylonjs/core/types\";\r\nimport { Scalar } from \"@babylonjs/core/Maths/math.scalar\";\r\nimport { SphericalHarmonics, SphericalPolynomial } from \"@babylonjs/core/Maths/sphericalPolynomial\";\r\nimport { Quaternion, Matrix } from \"@babylonjs/core/Maths/math\";\r\nimport { BaseTexture } from \"@babylonjs/core/Materials/Textures/baseTexture\";\r\nimport { RawCubeTexture } from \"@babylonjs/core/Materials/Textures/rawCubeTexture\";\r\n\r\nimport { IChildRootProperty } from \"babylonjs-gltf2interface\";\r\nimport { IScene } from \"../glTFLoaderInterfaces\";\r\nimport { IGLTFLoaderExtension } from \"../glTFLoaderExtension\";\r\nimport { GLTFLoader, ArrayItem } from \"../glTFLoader\";\r\n\r\nconst NAME = \"EXT_lights_image_based\";\r\n\r\ninterface ILightReference {\r\n light: number;\r\n}\r\n\r\ninterface ILight extends IChildRootProperty {\r\n intensity: number;\r\n rotation: number[];\r\n specularImageSize: number;\r\n specularImages: number[][];\r\n irradianceCoefficients: number[][];\r\n\r\n _babylonTexture?: BaseTexture;\r\n _loaded?: Promise<void>;\r\n}\r\n\r\ninterface ILights {\r\n lights: ILight[];\r\n}\r\n\r\n/**\r\n * [Specification](https://github.com/KhronosGroup/glTF/blob/eb3e32332042e04691a5f35103f8c261e50d8f1e/extensions/2.0/Khronos/EXT_lights_image_based/README.md) (Experimental)\r\n */\r\nexport class EXT_lights_image_based implements IGLTFLoaderExtension {\r\n /** The name of this extension. */\r\n public readonly name = NAME;\r\n\r\n /** Defines whether this extension is enabled. */\r\n public enabled = true;\r\n\r\n private _loader: GLTFLoader;\r\n private _lights?: ILight[];\r\n\r\n /** @hidden */\r\n constructor(loader: GLTFLoader) {\r\n this._loader = loader;\r\n }\r\n\r\n /** @hidden */\r\n public dispose() {\r\n delete this._loader;\r\n delete this._lights;\r\n }\r\n\r\n /** @hidden */\r\n public onLoading(): void {\r\n const extensions = this._loader.gltf.extensions;\r\n if (extensions && extensions[this.name]) {\r\n const extension = extensions[this.name] as ILights;\r\n this._lights = extension.lights;\r\n }\r\n }\r\n\r\n /** @hidden */\r\n public loadSceneAsync(context: string, scene: IScene): Nullable<Promise<void>> {\r\n return GLTFLoader.LoadExtensionAsync<ILightReference>(context, scene, this.name, (extensionContext, extension) => {\r\n const promises = new Array<Promise<any>>();\r\n\r\n promises.push(this._loader.loadSceneAsync(context, scene));\r\n\r\n this._loader.logOpen(`${extensionContext}`);\r\n\r\n const light = ArrayItem.Get(`${extensionContext}/light`, this._lights, extension.light);\r\n promises.push(this._loadLightAsync(`#/extensions/${this.name}/lights/${extension.light}`, light).then((texture) => {\r\n this._loader.babylonScene.environmentTexture = texture;\r\n }));\r\n\r\n this._loader.logClose();\r\n\r\n return Promise.all(promises).then(() => { });\r\n });\r\n }\r\n\r\n private _loadLightAsync(context: string, light: ILight): Promise<BaseTexture> {\r\n if (!light._loaded) {\r\n const promises = new Array<Promise<any>>();\r\n\r\n this._loader.logOpen(`${context}`);\r\n\r\n const imageData = new Array<Array<ArrayBufferView>>(light.specularImages.length);\r\n for (let mipmap = 0; mipmap < light.specularImages.length; mipmap++) {\r\n const faces = light.specularImages[mipmap];\r\n imageData[mipmap] = new Array<ArrayBufferView>(faces.length);\r\n for (let face = 0; face < faces.length; face++) {\r\n const specularImageContext = `${context}/specularImages/${mipmap}/${face}`;\r\n this._loader.logOpen(`${specularImageContext}`);\r\n\r\n const index = faces[face];\r\n const image = ArrayItem.Get(specularImageContext, this._loader.gltf.images, index);\r\n promises.push(this._loader.loadImageAsync(`#/images/${index}`, image).then((data) => {\r\n imageData[mipmap][face] = data;\r\n }));\r\n\r\n this._loader.logClose();\r\n }\r\n }\r\n\r\n this._loader.logClose();\r\n\r\n light._loaded = Promise.all(promises).then(() => {\r\n const babylonTexture = new RawCubeTexture(this._loader.babylonScene, null, light.specularImageSize);\r\n light._babylonTexture = babylonTexture;\r\n\r\n if (light.intensity != undefined) {\r\n babylonTexture.level = light.intensity;\r\n }\r\n\r\n if (light.rotation) {\r\n let rotation = Quaternion.FromArray(light.rotation);\r\n\r\n // Invert the rotation so that positive rotation is counter-clockwise.\r\n if (!this._loader.babylonScene.useRightHandedSystem) {\r\n rotation = Quaternion.Inverse(rotation);\r\n }\r\n\r\n Matrix.FromQuaternionToRef(rotation, babylonTexture.getReflectionTextureMatrix());\r\n }\r\n\r\n const sphericalHarmonics = SphericalHarmonics.FromArray(light.irradianceCoefficients);\r\n sphericalHarmonics.scale(light.intensity);\r\n\r\n sphericalHarmonics.convertIrradianceToLambertianRadiance();\r\n const sphericalPolynomial = SphericalPolynomial.FromHarmonics(sphericalHarmonics);\r\n\r\n // Compute the lod generation scale to fit exactly to the number of levels available.\r\n const lodGenerationScale = (imageData.length - 1) / Scalar.Log2(light.specularImageSize);\r\n return babylonTexture.updateRGBDAsync(imageData, sphericalPolynomial, lodGenerationScale);\r\n });\r\n }\r\n\r\n return light._loaded.then(() => {\r\n return light._babylonTexture!;\r\n });\r\n }\r\n}\r\n\r\nGLTFLoader.RegisterExtension(NAME, (loader) => new EXT_lights_image_based(loader));"]} |