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{ Nullable } from \"@babylonjs/core/types\";\nimport { Color3, Vector3 } from \"@babylonjs/core/Maths/math\";\nimport { DirectionalLight } from \"@babylonjs/core/Lights/directionalLight\";\nimport { PointLight } from \"@babylonjs/core/Lights/pointLight\";\nimport { SpotLight } from \"@babylonjs/core/Lights/spotLight\";\nimport { Light } from \"@babylonjs/core/Lights/light\";\nimport { TransformNode } from \"@babylonjs/core/Meshes/transformNode\";\n\nimport { IChildRootProperty } from \"babylonjs-gltf2interface\";\nimport { INode } from \"../glTFLoaderInterfaces\";\nimport { IGLTFLoaderExtension } from \"../glTFLoaderExtension\";\nimport { GLTFLoader, ArrayItem } from \"../glTFLoader\";\n\nconst NAME = \"KHR_lights_punctual\";\n\nenum LightType {\n DIRECTIONAL = \"directional\",\n POINT = \"point\",\n SPOT = \"spot\"\n}\n\ninterface ILightReference {\n light: number;\n}\n\ninterface ILight extends IChildRootProperty {\n type: LightType;\n color?: number[];\n intensity?: number;\n range?: number;\n spot?: {\n innerConeAngle?: number;\n outerConeAngle?: number;\n };\n}\n\ninterface ILights {\n lights: ILight[];\n}\n\n/**\n * [Specification](https://github.com/KhronosGroup/glTF/blob/1048d162a44dbcb05aefc1874bfd423cf60135a6/extensions/2.0/Khronos/KHR_lights_punctual/README.md) (Experimental)\n */\nexport class KHR_lights 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 private _lights?: ILight[];\n\n /** @hidden */\n constructor(loader: GLTFLoader) {\n this._loader = loader;\n }\n\n /** @hidden */\n public dispose() {\n delete this._loader;\n delete this._lights;\n }\n\n /** @hidden */\n public onLoading(): void {\n const extensions = this._loader.gltf.extensions;\n if (extensions && extensions[this.name]) {\n const extension = extensions[this.name] as ILights;\n this._lights = extension.lights;\n }\n }\n\n /** @hidden */\n public loadNodeAsync(context: string, node: INode, assign: (babylonTransformNode: TransformNode) => void): Nullable<Promise<TransformNode>> {\n return GLTFLoader.LoadExtensionAsync<ILightReference, TransformNode>(context, node, this.name, (extensionContext, extension) => {\n return this._loader.loadNodeAsync(context, node, (babylonMesh) => {\n let babylonLight: Light;\n\n const light = ArrayItem.Get(extensionContext, this._lights, extension.light);\n const name = light.name || babylonMesh.name;\n\n switch (light.type) {\n case LightType.DIRECTIONAL: {\n babylonLight = new DirectionalLight(name, Vector3.Backward(), this._loader.babylonScene);\n break;\n }\n case LightType.POINT: {\n babylonLight = new PointLight(name, Vector3.Zero(), this._loader.babylonScene);\n break;\n }\n case LightType.SPOT: {\n const babylonSpotLight = new SpotLight(name, Vector3.Zero(), Vector3.Backward(), 0, 1, this._loader.babylonScene);\n babylonSpotLight.angle = ((light.spot && light.spot.outerConeAngle) || Math.PI / 4) * 2;\n babylonSpotLight.innerAngle = ((light.spot && light.spot.innerConeAngle) || 0) * 2;\n babylonLight = babylonSpotLight;\n break;\n }\n default: {\n throw new Error(`${extensionContext}: Invalid light type (${light.type})`);\n }\n }\n\n babylonLight.falloffType = Light.FALLOFF_GLTF;\n babylonLight.diffuse = light.color ? Color3.FromArray(light.color) : Color3.White();\n babylonLight.intensity = light.intensity == undefined ? 1 : light.intensity;\n babylonLight.range = light.range == undefined ? Number.MAX_VALUE : light.range;\n babylonLight.parent = babylonMesh;\n\n GLTFLoader.AddPointerMetadata(babylonLight, extensionContext);\n\n assign(babylonMesh);\n });\n });\n }\n}\n\nGLTFLoader.RegisterExtension(NAME, (loader) => new KHR_lights(loader));"]} |