Babylon.js/dist/preview release/loaders/babylonjs.loaders.d.ts

declare module BABYLON {
    class STLFileLoader implements ISceneLoaderPlugin {
        solidPattern: RegExp;
        facetsPattern: RegExp;
        normalPattern: RegExp;
        vertexPattern: RegExp;
        name: string;
        extensions: ISceneLoaderPluginExtensions;
        importMesh(meshesNames: any, scene: Scene, data: any, rootUrl: string, meshes: Nullable<AbstractMesh[]>, particleSystems: Nullable<IParticleSystem[]>, skeletons: Nullable<Skeleton[]>): boolean;
        load(scene: Scene, data: any, rootUrl: string): boolean;
        loadAssetContainer(scene: Scene, data: string, rootUrl: string, onError?: (message: string, exception?: any) => void): AssetContainer;
        private isBinary(data);
        private parseBinary(mesh, data);
        private parseASCII(mesh, solidData);
    }
}


declare module BABYLON {
    /**
     * Class reading and parsing the MTL file bundled with the obj file.
     */
    class MTLFileLoader {
        materials: BABYLON.StandardMaterial[];
        /**
         * This function will read the mtl file and create each material described inside
         * This function could be improve by adding :
         * -some component missing (Ni, Tf...)
         * -including the specific options available
         *
         * @param scene
         * @param data
         * @param rootUrl
         */
        parseMTL(scene: BABYLON.Scene, data: string | ArrayBuffer, rootUrl: string): void;
        /**
         * Gets the texture for the material.
         *
         * If the material is imported from input file,
         * We sanitize the url to ensure it takes the textre from aside the material.
         *
         * @param rootUrl The root url to load from
         * @param value The value stored in the mtl
         * @return The Texture
         */
        private static _getTexture(rootUrl, value, scene);
    }
    class OBJFileLoader implements ISceneLoaderPluginAsync {
        static OPTIMIZE_WITH_UV: boolean;
        static INVERT_Y: boolean;
        name: string;
        extensions: string;
        obj: RegExp;
        group: RegExp;
        mtllib: RegExp;
        usemtl: RegExp;
        smooth: RegExp;
        vertexPattern: RegExp;
        normalPattern: RegExp;
        uvPattern: RegExp;
        facePattern1: RegExp;
        facePattern2: RegExp;
        facePattern3: RegExp;
        facePattern4: RegExp;
        /**
         * Calls synchronously the MTL file attached to this obj.
         * Load function or importMesh function don't enable to load 2 files in the same time asynchronously.
         * Without this function materials are not displayed in the first frame (but displayed after).
         * In consequence it is impossible to get material information in your HTML file
         *
         * @param url The URL of the MTL file
         * @param rootUrl
         * @param onSuccess Callback function to be called when the MTL file is loaded
         * @private
         */
        private _loadMTL(url, rootUrl, onSuccess);
        importMeshAsync(meshesNames: any, scene: Scene, data: any, rootUrl: string, onProgress?: (event: SceneLoaderProgressEvent) => void): Promise<{
            meshes: AbstractMesh[];
            particleSystems: IParticleSystem[];
            skeletons: Skeleton[];
            animationGroups: AnimationGroup[];
        }>;
        loadAsync(scene: Scene, data: string, rootUrl: string, onProgress?: (event: SceneLoaderProgressEvent) => void): Promise<void>;
        loadAssetContainerAsync(scene: Scene, data: string, rootUrl: string, onProgress?: (event: SceneLoaderProgressEvent) => void): Promise<AssetContainer>;
        /**
         * Read the OBJ file and create an Array of meshes.
         * Each mesh contains all information given by the OBJ and the MTL file.
         * i.e. vertices positions and indices, optional normals values, optional UV values, optional material
         *
         * @param meshesNames
         * @param scene BABYLON.Scene The scene where are displayed the data
         * @param data String The content of the obj file
         * @param rootUrl String The path to the folder
         * @returns Array<AbstractMesh>
         * @private
         */
        private _parseSolid(meshesNames, scene, data, rootUrl);
    }
}


declare module BABYLON {
    /**
     * Mode that determines the coordinate system to use.
     */
    enum GLTFLoaderCoordinateSystemMode {
        /**
         * Automatically convert the glTF right-handed data to the appropriate system based on the current coordinate system mode of the scene.
         */
        AUTO = 0,
        /**
         * Sets the useRightHandedSystem flag on the scene.
         */
        FORCE_RIGHT_HANDED = 1,
    }
    /**
     * Mode that determines what animations will start.
     */
    enum GLTFLoaderAnimationStartMode {
        /**
         * No animation will start.
         */
        NONE = 0,
        /**
         * The first animation will start.
         */
        FIRST = 1,
        /**
         * All animations will start.
         */
        ALL = 2,
    }
    /**
     * Interface that contains the data for the glTF asset.
     */
    interface IGLTFLoaderData {
        /**
         * JSON that represents the glTF.
         */
        json: Object;
        /**
         * The BIN chunk of a binary glTF
         */
        bin: Nullable<ArrayBufferView>;
    }
    /**
     * Interface for extending the loader.
     */
    interface IGLTFLoaderExtension {
        /**
         * The name of this extension.
         */
        readonly name: string;
        /**
         * Defines whether this extension is enabled.
         */
        enabled: boolean;
    }
    /**
     * Loader state.
     */
    enum GLTFLoaderState {
        /**
         * The asset is loading.
         */
        LOADING = 0,
        /**
         * The asset is ready for rendering.
         */
        READY = 1,
        /**
         * The asset is completely loaded.
         */
        COMPLETE = 2,
    }
    /** @hidden */
    interface IGLTFLoader extends IDisposable {
        readonly state: Nullable<GLTFLoaderState>;
        importMeshAsync: (meshesNames: any, scene: Scene, data: IGLTFLoaderData, rootUrl: string, onProgress?: (event: SceneLoaderProgressEvent) => void) => Promise<{
            meshes: AbstractMesh[];
            particleSystems: IParticleSystem[];
            skeletons: Skeleton[];
            animationGroups: AnimationGroup[];
        }>;
        loadAsync: (scene: Scene, data: IGLTFLoaderData, rootUrl: string, onProgress?: (event: SceneLoaderProgressEvent) => void) => Promise<void>;
    }
    /**
     * File loader for loading glTF files into a scene.
     */
    class GLTFFileLoader implements IDisposable, ISceneLoaderPluginAsync, ISceneLoaderPluginFactory {
        /** @hidden */
        static _CreateGLTFLoaderV1: (parent: GLTFFileLoader) => IGLTFLoader;
        /** @hidden */
        static _CreateGLTFLoaderV2: (parent: GLTFFileLoader) => IGLTFLoader;
        /**
         * Raised when the asset has been parsed
         */
        onParsedObservable: Observable<IGLTFLoaderData>;
        private _onParsedObserver;
        /**
         * Raised when the asset has been parsed
         */
        onParsed: (loaderData: IGLTFLoaderData) => void;
        /**
         * Set this property to false to disable incremental loading which delays the loader from calling the success callback until after loading the meshes and shaders.
         * Textures always loads asynchronously. For example, the success callback can compute the bounding information of the loaded meshes when incremental loading is disabled.
         * Defaults to true.
         * @hidden
         */
        static IncrementalLoading: boolean;
        /**
         * Set this property to true in order to work with homogeneous coordinates, available with some converters and exporters.
         * Defaults to false. See https://en.wikipedia.org/wiki/Homogeneous_coordinates.
         * @hidden
         */
        static HomogeneousCoordinates: boolean;
        /**
         * The coordinate system mode. Defaults to AUTO.
         */
        coordinateSystemMode: GLTFLoaderCoordinateSystemMode;
        /**
        * The animation start mode. Defaults to FIRST.
        */
        animationStartMode: GLTFLoaderAnimationStartMode;
        /**
         * Defines if the loader should compile materials before raising the success callback. Defaults to false.
         */
        compileMaterials: boolean;
        /**
         * Defines if the loader should also compile materials with clip planes. Defaults to false.
         */
        useClipPlane: boolean;
        /**
         * Defines if the loader should compile shadow generators before raising the success callback. Defaults to false.
         */
        compileShadowGenerators: boolean;
        /**
         * Defines if the Alpha blended materials are only applied as coverage.
         * If false, (default) The luminance of each pixel will reduce its opacity to simulate the behaviour of most physical materials.
         * If true, no extra effects are applied to transparent pixels.
         */
        transparencyAsCoverage: boolean;
        /** @hidden */
        _normalizeAnimationGroupsToBeginAtZero: boolean;
        /**
         * Function called before loading a url referenced by the asset.
         */
        preprocessUrlAsync: (url: string) => Promise<string>;
        /**
         * Observable raised when the loader creates a mesh after parsing the glTF properties of the mesh.
         */
        readonly onMeshLoadedObservable: Observable<AbstractMesh>;
        private _onMeshLoadedObserver;
        /**
         * Callback raised when the loader creates a mesh after parsing the glTF properties of the mesh.
         */
        onMeshLoaded: (mesh: AbstractMesh) => void;
        /**
         * Observable raised when the loader creates a texture after parsing the glTF properties of the texture.
         */
        readonly onTextureLoadedObservable: Observable<BaseTexture>;
        private _onTextureLoadedObserver;
        /**
         * Callback raised when the loader creates a texture after parsing the glTF properties of the texture.
         */
        onTextureLoaded: (texture: BaseTexture) => void;
        /**
         * Observable raised when the loader creates a material after parsing the glTF properties of the material.
         */
        readonly onMaterialLoadedObservable: Observable<Material>;
        private _onMaterialLoadedObserver;
        /**
         * Callback raised when the loader creates a material after parsing the glTF properties of the material.
         */
        onMaterialLoaded: (material: Material) => void;
        /**
         * Observable raised when the loader creates a camera after parsing the glTF properties of the camera.
         */
        readonly onCameraLoadedObservable: Observable<Camera>;
        private _onCameraLoadedObserver;
        /**
         * Callback raised when the loader creates a camera after parsing the glTF properties of the camera.
         */
        onCameraLoaded: (camera: Camera) => void;
        /**
         * Observable raised when the asset is completely loaded, immediately before the loader is disposed.
         * For assets with LODs, raised when all of the LODs are complete.
         * For assets without LODs, raised when the model is complete, immediately after the loader resolves the returned promise.
         */
        readonly onCompleteObservable: Observable<void>;
        private _onCompleteObserver;
        /**
         * Callback raised when the asset is completely loaded, immediately before the loader is disposed.
         */
        onComplete: () => void;
        /**
         * Observable raised after the loader is disposed.
         */
        readonly onDisposeObservable: Observable<void>;
        private _onDisposeObserver;
        /**
         * Callback raised after the loader is disposed.
         */
        onDispose: () => void;
        /**
         * Observable raised after a loader extension is created.
         * Set additional options for a loader extension in this event.
         */
        readonly onExtensionLoadedObservable: Observable<IGLTFLoaderExtension>;
        private _onExtensionLoadedObserver;
        /**
         * Callback raised after a loader extension is created.
         */
        onExtensionLoaded: (extension: IGLTFLoaderExtension) => void;
        /**
         * Returns a promise that resolves when the asset is completely loaded.
         * @returns a promise that resolves when the asset is completely loaded.
         */
        whenCompleteAsync(): Promise<void>;
        /**
         * The loader state or null if the loader is not active.
         */
        readonly loaderState: Nullable<GLTFLoaderState>;
        /**
         * Defines if the loader logging is enabled.
         */
        loggingEnabled: boolean;
        /**
         * Defines if the loader should capture performance counters.
         */
        capturePerformanceCounters: boolean;
        private _loader;
        /**
         * Name of the loader ("gltf")
         */
        name: string;
        /**
         * Supported file extensions of the loader (.gltf, .glb)
         */
        extensions: ISceneLoaderPluginExtensions;
        /**
         * Disposes the loader, releases resources during load, and cancels any outstanding requests.
         */
        dispose(): void;
        /** @hidden */
        _clear(): void;
        /**
         * Imports one or more meshes from the loaded glTF data and adds them to the scene
         * @param meshesNames a string or array of strings of the mesh names that should be loaded from the file
         * @param scene the scene the meshes should be added to
         * @param data the glTF data to load
         * @param rootUrl root url to load from
         * @param onProgress event that fires when loading progress has occured
         * @returns a promise containg the loaded meshes, particles, skeletons and animations
         */
        importMeshAsync(meshesNames: any, scene: Scene, data: any, rootUrl: string, onProgress?: (event: SceneLoaderProgressEvent) => void): Promise<{
            meshes: AbstractMesh[];
            particleSystems: IParticleSystem[];
            skeletons: Skeleton[];
            animationGroups: AnimationGroup[];
        }>;
        /**
         * Imports all objects from the loaded glTF data and adds them to the scene
         * @param scene the scene the objects should be added to
         * @param data the glTF data to load
         * @param rootUrl root url to load from
         * @param onProgress event that fires when loading progress has occured
         * @returns a promise which completes when objects have been loaded to the scene
         */
        loadAsync(scene: Scene, data: string | ArrayBuffer, rootUrl: string, onProgress?: (event: SceneLoaderProgressEvent) => void): Promise<void>;
        /**
         * Load into an asset container.
         * @param scene The scene to load into
         * @param data The data to import
         * @param rootUrl The root url for scene and resources
         * @param onProgress The callback when the load progresses
         * @returns The loaded asset container
         */
        loadAssetContainerAsync(scene: Scene, data: string | ArrayBuffer, rootUrl: string, onProgress?: (event: SceneLoaderProgressEvent) => void): Promise<AssetContainer>;
        /**
         * If the data string can be loaded directly.
         * @param data string contianing the file data
         * @returns if the data can be loaded directly
         */
        canDirectLoad(data: string): boolean;
        /**
         * Rewrites a url by combining a root url and response url.
         */
        rewriteRootURL: (rootUrl: string, responseURL?: string) => string;
        /**
         * Instantiates a glTF file loader plugin.
         * @returns the created plugin
         */
        createPlugin(): ISceneLoaderPlugin | ISceneLoaderPluginAsync;
        private _parse(data);
        private _getLoader(loaderData);
        private _parseBinary(data);
        private _parseV1(binaryReader);
        private _parseV2(binaryReader);
        private static _parseVersion(version);
        private static _compareVersion(a, b);
        private static _decodeBufferToText(buffer);
        private static readonly _logSpaces;
        private _logIndentLevel;
        private _loggingEnabled;
        /** @hidden */
        _log: (message: string) => void;
        /** @hidden */
        _logOpen(message: string): void;
        /** @hidden */
        _logClose(): void;
        private _logEnabled(message);
        private _logDisabled(message);
        private _capturePerformanceCounters;
        /** @hidden */
        _startPerformanceCounter: (counterName: string) => void;
        /** @hidden */
        _endPerformanceCounter: (counterName: string) => void;
        private _startPerformanceCounterEnabled(counterName);
        private _startPerformanceCounterDisabled(counterName);
        private _endPerformanceCounterEnabled(counterName);
        private _endPerformanceCounterDisabled(counterName);
    }
}


declare module BABYLON.GLTF1 {
    /**
    * Enums
    */
    enum EComponentType {
        BYTE = 5120,
        UNSIGNED_BYTE = 5121,
        SHORT = 5122,
        UNSIGNED_SHORT = 5123,
        FLOAT = 5126,
    }
    enum EShaderType {
        FRAGMENT = 35632,
        VERTEX = 35633,
    }
    enum EParameterType {
        BYTE = 5120,
        UNSIGNED_BYTE = 5121,
        SHORT = 5122,
        UNSIGNED_SHORT = 5123,
        INT = 5124,
        UNSIGNED_INT = 5125,
        FLOAT = 5126,
        FLOAT_VEC2 = 35664,
        FLOAT_VEC3 = 35665,
        FLOAT_VEC4 = 35666,
        INT_VEC2 = 35667,
        INT_VEC3 = 35668,
        INT_VEC4 = 35669,
        BOOL = 35670,
        BOOL_VEC2 = 35671,
        BOOL_VEC3 = 35672,
        BOOL_VEC4 = 35673,
        FLOAT_MAT2 = 35674,
        FLOAT_MAT3 = 35675,
        FLOAT_MAT4 = 35676,
        SAMPLER_2D = 35678,
    }
    enum ETextureWrapMode {
        CLAMP_TO_EDGE = 33071,
        MIRRORED_REPEAT = 33648,
        REPEAT = 10497,
    }
    enum ETextureFilterType {
        NEAREST = 9728,
        LINEAR = 9728,
        NEAREST_MIPMAP_NEAREST = 9984,
        LINEAR_MIPMAP_NEAREST = 9985,
        NEAREST_MIPMAP_LINEAR = 9986,
        LINEAR_MIPMAP_LINEAR = 9987,
    }
    enum ETextureFormat {
        ALPHA = 6406,
        RGB = 6407,
        RGBA = 6408,
        LUMINANCE = 6409,
        LUMINANCE_ALPHA = 6410,
    }
    enum ECullingType {
        FRONT = 1028,
        BACK = 1029,
        FRONT_AND_BACK = 1032,
    }
    enum EBlendingFunction {
        ZERO = 0,
        ONE = 1,
        SRC_COLOR = 768,
        ONE_MINUS_SRC_COLOR = 769,
        DST_COLOR = 774,
        ONE_MINUS_DST_COLOR = 775,
        SRC_ALPHA = 770,
        ONE_MINUS_SRC_ALPHA = 771,
        DST_ALPHA = 772,
        ONE_MINUS_DST_ALPHA = 773,
        CONSTANT_COLOR = 32769,
        ONE_MINUS_CONSTANT_COLOR = 32770,
        CONSTANT_ALPHA = 32771,
        ONE_MINUS_CONSTANT_ALPHA = 32772,
        SRC_ALPHA_SATURATE = 776,
    }
    /**
    * Interfaces
    */
    interface IGLTFProperty {
        extensions?: {
            [key: string]: any;
        };
        extras?: Object;
    }
    interface IGLTFChildRootProperty extends IGLTFProperty {
        name?: string;
    }
    interface IGLTFAccessor extends IGLTFChildRootProperty {
        bufferView: string;
        byteOffset: number;
        byteStride: number;
        count: number;
        type: string;
        componentType: EComponentType;
        max?: number[];
        min?: number[];
        name?: string;
    }
    interface IGLTFBufferView extends IGLTFChildRootProperty {
        buffer: string;
        byteOffset: number;
        byteLength: number;
        byteStride: number;
        target?: number;
    }
    interface IGLTFBuffer extends IGLTFChildRootProperty {
        uri: string;
        byteLength?: number;
        type?: string;
    }
    interface IGLTFShader extends IGLTFChildRootProperty {
        uri: string;
        type: EShaderType;
    }
    interface IGLTFProgram extends IGLTFChildRootProperty {
        attributes: string[];
        fragmentShader: string;
        vertexShader: string;
    }
    interface IGLTFTechniqueParameter {
        type: number;
        count?: number;
        semantic?: string;
        node?: string;
        value?: number | boolean | string | Array<any>;
        source?: string;
        babylonValue?: any;
    }
    interface IGLTFTechniqueCommonProfile {
        lightingModel: string;
        texcoordBindings: Object;
        parameters?: Array<any>;
    }
    interface IGLTFTechniqueStatesFunctions {
        blendColor?: number[];
        blendEquationSeparate?: number[];
        blendFuncSeparate?: number[];
        colorMask: boolean[];
        cullFace: number[];
    }
    interface IGLTFTechniqueStates {
        enable: number[];
        functions: IGLTFTechniqueStatesFunctions;
    }
    interface IGLTFTechnique extends IGLTFChildRootProperty {
        parameters: {
            [key: string]: IGLTFTechniqueParameter;
        };
        program: string;
        attributes: {
            [key: string]: string;
        };
        uniforms: {
            [key: string]: string;
        };
        states: IGLTFTechniqueStates;
    }
    interface IGLTFMaterial extends IGLTFChildRootProperty {
        technique?: string;
        values: string[];
    }
    interface IGLTFMeshPrimitive extends IGLTFProperty {
        attributes: {
            [key: string]: string;
        };
        indices: string;
        material: string;
        mode?: number;
    }
    interface IGLTFMesh extends IGLTFChildRootProperty {
        primitives: IGLTFMeshPrimitive[];
    }
    interface IGLTFImage extends IGLTFChildRootProperty {
        uri: string;
    }
    interface IGLTFSampler extends IGLTFChildRootProperty {
        magFilter?: number;
        minFilter?: number;
        wrapS?: number;
        wrapT?: number;
    }
    interface IGLTFTexture extends IGLTFChildRootProperty {
        sampler: string;
        source: string;
        format?: ETextureFormat;
        internalFormat?: ETextureFormat;
        target?: number;
        type?: number;
        babylonTexture?: Texture;
    }
    interface IGLTFAmbienLight {
        color?: number[];
    }
    interface IGLTFDirectionalLight {
        color?: number[];
    }
    interface IGLTFPointLight {
        color?: number[];
        constantAttenuation?: number;
        linearAttenuation?: number;
        quadraticAttenuation?: number;
    }
    interface IGLTFSpotLight {
        color?: number[];
        constantAttenuation?: number;
        fallOfAngle?: number;
        fallOffExponent?: number;
        linearAttenuation?: number;
        quadraticAttenuation?: number;
    }
    interface IGLTFLight extends IGLTFChildRootProperty {
        type: string;
    }
    interface IGLTFCameraOrthographic {
        xmag: number;
        ymag: number;
        zfar: number;
        znear: number;
    }
    interface IGLTFCameraPerspective {
        aspectRatio: number;
        yfov: number;
        zfar: number;
        znear: number;
    }
    interface IGLTFCamera extends IGLTFChildRootProperty {
        type: string;
    }
    interface IGLTFAnimationChannelTarget {
        id: string;
        path: string;
    }
    interface IGLTFAnimationChannel {
        sampler: string;
        target: IGLTFAnimationChannelTarget;
    }
    interface IGLTFAnimationSampler {
        input: string;
        output: string;
        interpolation?: string;
    }
    interface IGLTFAnimation extends IGLTFChildRootProperty {
        channels?: IGLTFAnimationChannel[];
        parameters?: {
            [key: string]: string;
        };
        samplers?: {
            [key: string]: IGLTFAnimationSampler;
        };
    }
    interface IGLTFNodeInstanceSkin {
        skeletons: string[];
        skin: string;
        meshes: string[];
    }
    interface IGLTFSkins extends IGLTFChildRootProperty {
        bindShapeMatrix: number[];
        inverseBindMatrices: string;
        jointNames: string[];
        babylonSkeleton?: Skeleton;
    }
    interface IGLTFNode extends IGLTFChildRootProperty {
        camera?: string;
        children: string[];
        skin?: string;
        jointName?: string;
        light?: string;
        matrix: number[];
        mesh?: string;
        meshes?: string[];
        rotation?: number[];
        scale?: number[];
        translation?: number[];
        babylonNode?: Node;
    }
    interface IGLTFScene extends IGLTFChildRootProperty {
        nodes: string[];
    }
    /**
    * Runtime
    */
    interface IGLTFRuntime {
        extensions: {
            [key: string]: any;
        };
        accessors: {
            [key: string]: IGLTFAccessor;
        };
        buffers: {
            [key: string]: IGLTFBuffer;
        };
        bufferViews: {
            [key: string]: IGLTFBufferView;
        };
        meshes: {
            [key: string]: IGLTFMesh;
        };
        lights: {
            [key: string]: IGLTFLight;
        };
        cameras: {
            [key: string]: IGLTFCamera;
        };
        nodes: {
            [key: string]: IGLTFNode;
        };
        images: {
            [key: string]: IGLTFImage;
        };
        textures: {
            [key: string]: IGLTFTexture;
        };
        shaders: {
            [key: string]: IGLTFShader;
        };
        programs: {
            [key: string]: IGLTFProgram;
        };
        samplers: {
            [key: string]: IGLTFSampler;
        };
        techniques: {
            [key: string]: IGLTFTechnique;
        };
        materials: {
            [key: string]: IGLTFMaterial;
        };
        animations: {
            [key: string]: IGLTFAnimation;
        };
        skins: {
            [key: string]: IGLTFSkins;
        };
        currentScene?: Object;
        scenes: {
            [key: string]: IGLTFScene;
        };
        extensionsUsed: string[];
        extensionsRequired?: string[];
        buffersCount: number;
        shaderscount: number;
        scene: Scene;
        rootUrl: string;
        loadedBufferCount: number;
        loadedBufferViews: {
            [name: string]: ArrayBufferView;
        };
        loadedShaderCount: number;
        importOnlyMeshes: boolean;
        importMeshesNames?: string[];
        dummyNodes: Node[];
    }
    /**
    * Bones
    */
    interface INodeToRoot {
        bone: Bone;
        node: IGLTFNode;
        id: string;
    }
    interface IJointNode {
        node: IGLTFNode;
        id: string;
    }
}


declare module BABYLON.GLTF1 {
    /**
    * Implementation of the base glTF spec
    */
    class GLTFLoaderBase {
        static CreateRuntime(parsedData: any, scene: Scene, rootUrl: string): IGLTFRuntime;
        static LoadBufferAsync(gltfRuntime: IGLTFRuntime, id: string, onSuccess: (buffer: ArrayBufferView) => void, onError: (message: string) => void, onProgress?: () => void): void;
        static LoadTextureBufferAsync(gltfRuntime: IGLTFRuntime, id: string, onSuccess: (buffer: Nullable<ArrayBufferView>) => void, onError: (message: string) => void): void;
        static CreateTextureAsync(gltfRuntime: IGLTFRuntime, id: string, buffer: Nullable<ArrayBufferView>, onSuccess: (texture: Texture) => void, onError: (message: string) => void): void;
        static LoadShaderStringAsync(gltfRuntime: IGLTFRuntime, id: string, onSuccess: (shaderString: string | ArrayBuffer) => void, onError?: (message: string) => void): void;
        static LoadMaterialAsync(gltfRuntime: IGLTFRuntime, id: string, onSuccess: (material: Material) => void, onError: (message: string) => void): void;
    }
    /**
    * glTF V1 Loader
    */
    class GLTFLoader implements IGLTFLoader {
        static Extensions: {
            [name: string]: GLTFLoaderExtension;
        };
        static RegisterExtension(extension: GLTFLoaderExtension): void;
        state: Nullable<GLTFLoaderState>;
        dispose(): void;
        private _importMeshAsync(meshesNames, scene, data, rootUrl, onSuccess, onProgress?, onError?);
        /**
        * Imports one or more meshes from a loaded gltf file and adds them to the scene
        * @param meshesNames a string or array of strings of the mesh names that should be loaded from the file
        * @param scene the scene the meshes should be added to
        * @param data gltf data containing information of the meshes in a loaded file
        * @param rootUrl root url to load from
        * @param onProgress event that fires when loading progress has occured
        * @returns a promise containg the loaded meshes, particles, skeletons and animations
        */
        importMeshAsync(meshesNames: any, scene: Scene, data: IGLTFLoaderData, rootUrl: string, onProgress?: (event: SceneLoaderProgressEvent) => void): Promise<{
            meshes: AbstractMesh[];
            particleSystems: IParticleSystem[];
            skeletons: Skeleton[];
            animationGroups: AnimationGroup[];
        }>;
        private _loadAsync(scene, data, rootUrl, onSuccess, onProgress?, onError?);
        /**
        * Imports all objects from a loaded gltf file and adds them to the scene
        * @param scene the scene the objects should be added to
        * @param data gltf data containing information of the meshes in a loaded file
        * @param rootUrl root url to load from
        * @param onProgress event that fires when loading progress has occured
        * @returns a promise which completes when objects have been loaded to the scene
        */
        loadAsync(scene: Scene, data: IGLTFLoaderData, rootUrl: string, onProgress?: (event: SceneLoaderProgressEvent) => void): Promise<void>;
        private _loadShadersAsync(gltfRuntime, onload);
        private _loadBuffersAsync(gltfRuntime, onLoad, onProgress?);
        private _createNodes(gltfRuntime);
    }
}


declare module BABYLON.GLTF1 {
    /**
    * Utils functions for GLTF
    */
    class GLTFUtils {
        /**
         * Sets the given "parameter" matrix
         * @param scene: the {BABYLON.Scene} object
         * @param source: the source node where to pick the matrix
         * @param parameter: the GLTF technique parameter
         * @param uniformName: the name of the shader's uniform
         * @param shaderMaterial: the shader material
         */
        static SetMatrix(scene: Scene, source: Node, parameter: IGLTFTechniqueParameter, uniformName: string, shaderMaterial: ShaderMaterial | Effect): void;
        /**
         * Sets the given "parameter" matrix
         * @param shaderMaterial: the shader material
         * @param uniform: the name of the shader's uniform
         * @param value: the value of the uniform
         * @param type: the uniform's type (EParameterType FLOAT, VEC2, VEC3 or VEC4)
         */
        static SetUniform(shaderMaterial: ShaderMaterial | Effect, uniform: string, value: any, type: number): boolean;
        /**
        * Returns the wrap mode of the texture
        * @param mode: the mode value
        */
        static GetWrapMode(mode: number): number;
        /**
         * Returns the byte stride giving an accessor
         * @param accessor: the GLTF accessor objet
         */
        static GetByteStrideFromType(accessor: IGLTFAccessor): number;
        /**
         * Returns the texture filter mode giving a mode value
         * @param mode: the filter mode value
         */
        static GetTextureFilterMode(mode: number): ETextureFilterType;
        static GetBufferFromBufferView(gltfRuntime: IGLTFRuntime, bufferView: IGLTFBufferView, byteOffset: number, byteLength: number, componentType: EComponentType): ArrayBufferView;
        /**
         * Returns a buffer from its accessor
         * @param gltfRuntime: the GLTF runtime
         * @param accessor: the GLTF accessor
         */
        static GetBufferFromAccessor(gltfRuntime: IGLTFRuntime, accessor: IGLTFAccessor): any;
        /**
         * Decodes a buffer view into a string
         * @param view: the buffer view
         */
        static DecodeBufferToText(view: ArrayBufferView): string;
        /**
         * Returns the default material of gltf. Related to
         * https://github.com/KhronosGroup/glTF/tree/master/specification/1.0#appendix-a-default-material
         * @param scene: the Babylon.js scene
         */
        static GetDefaultMaterial(scene: Scene): ShaderMaterial;
        private static _DefaultMaterial;
    }
}


declare module BABYLON.GLTF1 {
    abstract class GLTFLoaderExtension {
        private _name;
        constructor(name: string);
        readonly name: string;
        /**
        * Defines an override for loading the runtime
        * Return true to stop further extensions from loading the runtime
        */
        loadRuntimeAsync(scene: Scene, data: IGLTFLoaderData, rootUrl: string, onSuccess?: (gltfRuntime: IGLTFRuntime) => void, onError?: (message: string) => void): boolean;
        /**
         * Defines an onverride for creating gltf runtime
         * Return true to stop further extensions from creating the runtime
         */
        loadRuntimeExtensionsAsync(gltfRuntime: IGLTFRuntime, onSuccess: () => void, onError?: (message: string) => void): boolean;
        /**
        * Defines an override for loading buffers
        * Return true to stop further extensions from loading this buffer
        */
        loadBufferAsync(gltfRuntime: IGLTFRuntime, id: string, onSuccess: (buffer: ArrayBufferView) => void, onError: (message: string) => void, onProgress?: () => void): boolean;
        /**
        * Defines an override for loading texture buffers
        * Return true to stop further extensions from loading this texture data
        */
        loadTextureBufferAsync(gltfRuntime: IGLTFRuntime, id: string, onSuccess: (buffer: ArrayBufferView) => void, onError: (message: string) => void): boolean;
        /**
        * Defines an override for creating textures
        * Return true to stop further extensions from loading this texture
        */
        createTextureAsync(gltfRuntime: IGLTFRuntime, id: string, buffer: ArrayBufferView, onSuccess: (texture: Texture) => void, onError: (message: string) => void): boolean;
        /**
        * Defines an override for loading shader strings
        * Return true to stop further extensions from loading this shader data
        */
        loadShaderStringAsync(gltfRuntime: IGLTFRuntime, id: string, onSuccess: (shaderString: string) => void, onError: (message: string) => void): boolean;
        /**
        * Defines an override for loading materials
        * Return true to stop further extensions from loading this material
        */
        loadMaterialAsync(gltfRuntime: IGLTFRuntime, id: string, onSuccess: (material: Material) => void, onError: (message: string) => void): boolean;
        static LoadRuntimeAsync(scene: Scene, data: IGLTFLoaderData, rootUrl: string, onSuccess?: (gltfRuntime: IGLTFRuntime) => void, onError?: (message: string) => void): void;
        static LoadRuntimeExtensionsAsync(gltfRuntime: IGLTFRuntime, onSuccess: () => void, onError?: (message: string) => void): void;
        static LoadBufferAsync(gltfRuntime: IGLTFRuntime, id: string, onSuccess: (bufferView: ArrayBufferView) => void, onError: (message: string) => void, onProgress?: () => void): void;
        static LoadTextureAsync(gltfRuntime: IGLTFRuntime, id: string, onSuccess: (texture: Texture) => void, onError: (message: string) => void): void;
        static LoadShaderStringAsync(gltfRuntime: IGLTFRuntime, id: string, onSuccess: (shaderData: string | ArrayBuffer) => void, onError: (message: string) => void): void;
        static LoadMaterialAsync(gltfRuntime: IGLTFRuntime, id: string, onSuccess: (material: Material) => void, onError: (message: string) => void): void;
        private static LoadTextureBufferAsync(gltfRuntime, id, onSuccess, onError);
        private static CreateTextureAsync(gltfRuntime, id, buffer, onSuccess, onError);
        private static ApplyExtensions(func, defaultFunc);
    }
}


declare module BABYLON.GLTF1 {
    class GLTFBinaryExtension extends GLTFLoaderExtension {
        private _bin;
        constructor();
        loadRuntimeAsync(scene: Scene, data: IGLTFLoaderData, rootUrl: string, onSuccess: (gltfRuntime: IGLTFRuntime) => void, onError: (message: string) => void): boolean;
        loadBufferAsync(gltfRuntime: IGLTFRuntime, id: string, onSuccess: (buffer: ArrayBufferView) => void, onError: (message: string) => void): boolean;
        loadTextureBufferAsync(gltfRuntime: IGLTFRuntime, id: string, onSuccess: (buffer: ArrayBufferView) => void, onError: (message: string) => void): boolean;
        loadShaderStringAsync(gltfRuntime: IGLTFRuntime, id: string, onSuccess: (shaderString: string) => void, onError: (message: string) => void): boolean;
    }
}


declare module BABYLON.GLTF1 {
    class GLTFMaterialsCommonExtension extends GLTFLoaderExtension {
        constructor();
        loadRuntimeExtensionsAsync(gltfRuntime: IGLTFRuntime, onSuccess: () => void, onError: (message: string) => void): boolean;
        loadMaterialAsync(gltfRuntime: IGLTFRuntime, id: string, onSuccess: (material: Material) => void, onError: (message: string) => void): boolean;
        private _loadTexture(gltfRuntime, id, material, propertyPath, onError);
    }
}



declare module BABYLON.GLTF2 {
    /** @hidden */
    interface _IArrayItem {
        _index: number;
    }
    /** @hidden */
    interface _ILoaderAccessor extends IAccessor, _IArrayItem {
        _data?: Promise<ArrayBufferView>;
        _babylonVertexBuffer?: Promise<VertexBuffer>;
    }
    /** @hidden */
    interface _ILoaderAnimationChannel extends IAnimationChannel, _IArrayItem {
    }
    /** @hidden */
    interface _ILoaderAnimationSamplerData {
        input: Float32Array;
        interpolation: AnimationSamplerInterpolation;
        output: Float32Array;
    }
    /** @hidden */
    interface _ILoaderAnimationSampler extends IAnimationSampler, _IArrayItem {
        _data?: Promise<_ILoaderAnimationSamplerData>;
    }
    /** @hidden */
    interface _ILoaderAnimation extends IAnimation, _IArrayItem {
        channels: _ILoaderAnimationChannel[];
        samplers: _ILoaderAnimationSampler[];
        _babylonAnimationGroup?: AnimationGroup;
    }
    /** @hidden */
    interface _ILoaderBuffer extends IBuffer, _IArrayItem {
        _data?: Promise<ArrayBufferView>;
    }
    /** @hidden */
    interface _ILoaderBufferView extends IBufferView, _IArrayItem {
        _data?: Promise<ArrayBufferView>;
        _babylonBuffer?: Promise<Buffer>;
    }
    /** @hidden */
    interface _ILoaderCamera extends ICamera, _IArrayItem {
    }
    /** @hidden */
    interface _ILoaderImage extends IImage, _IArrayItem {
        _data?: Promise<ArrayBufferView>;
    }
    /** @hidden */
    interface _ILoaderMaterial extends IMaterial, _IArrayItem {
        _babylonData?: {
            [drawMode: number]: {
                material: Material;
                meshes: AbstractMesh[];
                loaded: Promise<void>;
            };
        };
    }
    /** @hidden */
    interface _ILoaderMesh extends IMesh, _IArrayItem {
        primitives: _ILoaderMeshPrimitive[];
    }
    /** @hidden */
    interface _ILoaderMeshPrimitive extends IMeshPrimitive, _IArrayItem {
    }
    /** @hidden */
    interface _ILoaderNode extends INode, _IArrayItem {
        _parent?: _ILoaderNode;
        _babylonMesh?: Mesh;
        _primitiveBabylonMeshes?: Mesh[];
        _babylonBones?: Bone[];
        _numMorphTargets?: number;
    }
    /** @hidden */
    interface _ILoaderSamplerData {
        noMipMaps: boolean;
        samplingMode: number;
        wrapU: number;
        wrapV: number;
    }
    /** @hidden */
    interface _ILoaderSampler extends ISampler, _IArrayItem {
        _data?: _ILoaderSamplerData;
    }
    /** @hidden */
    interface _ILoaderScene extends IScene, _IArrayItem {
    }
    /** @hidden */
    interface _ILoaderSkin extends ISkin, _IArrayItem {
        _babylonSkeleton?: Skeleton;
        _loaded?: Promise<void>;
    }
    /** @hidden */
    interface _ILoaderTexture extends ITexture, _IArrayItem {
    }
    /** @hidden */
    interface _ILoaderGLTF extends IGLTF {
        accessors?: _ILoaderAccessor[];
        animations?: _ILoaderAnimation[];
        buffers?: _ILoaderBuffer[];
        bufferViews?: _ILoaderBufferView[];
        cameras?: _ILoaderCamera[];
        images?: _ILoaderImage[];
        materials?: _ILoaderMaterial[];
        meshes?: _ILoaderMesh[];
        nodes?: _ILoaderNode[];
        samplers?: _ILoaderSampler[];
        scenes?: _ILoaderScene[];
        skins?: _ILoaderSkin[];
        textures?: _ILoaderTexture[];
    }
}


/**
 * Defines the module used to import/export glTF 2.0 assets
 */
declare module BABYLON.GLTF2 {
    /** @hidden */
    class _ArrayItem {
        static Assign(values?: _IArrayItem[]): void;
    }
    /** @hidden */
    class GLTFLoader implements IGLTFLoader {
        _parent: GLTFFileLoader;
        _gltf: _ILoaderGLTF;
        _babylonScene: Scene;
        _readyPromise: Promise<void>;
        _completePromises: Promise<void>[];
        private _disposed;
        private _state;
        private _extensions;
        private _rootUrl;
        private _rootBabylonMesh;
        private _defaultSampler;
        private _defaultBabylonMaterials;
        private _progressCallback?;
        private _requests;
        private static _ExtensionNames;
        private static _ExtensionFactories;
        static _Register(name: string, factory: (loader: GLTFLoader) => GLTFLoaderExtension): void;
        /**
         * Loader state or null if the loader is not active.
         */
        readonly state: Nullable<GLTFLoaderState>;
        constructor(parent: GLTFFileLoader);
        dispose(): void;
        importMeshAsync(meshesNames: any, scene: Scene, data: IGLTFLoaderData, rootUrl: string, onProgress?: (event: SceneLoaderProgressEvent) => void): Promise<{
            meshes: AbstractMesh[];
            particleSystems: IParticleSystem[];
            skeletons: Skeleton[];
            animationGroups: AnimationGroup[];
        }>;
        loadAsync(scene: Scene, data: IGLTFLoaderData, rootUrl: string, onProgress?: (event: SceneLoaderProgressEvent) => void): Promise<void>;
        private _loadAsync(nodes);
        private _loadData(data);
        private _setupData();
        private _loadExtensions();
        private _checkExtensions();
        private _createRootNode();
        _loadSceneAsync(context: string, scene: _ILoaderScene): Promise<void>;
        private _forEachPrimitive(node, callback);
        private _getMeshes();
        private _getSkeletons();
        private _getAnimationGroups();
        private _startAnimations();
        _loadNodeAsync(context: string, node: _ILoaderNode): Promise<void>;
        private _loadMeshAsync(context, node, mesh, babylonMesh);
        private _loadPrimitiveAsync(context, node, mesh, primitive, babylonMesh);
        private _loadVertexDataAsync(context, primitive, babylonMesh);
        private _createMorphTargets(context, node, mesh, primitive, babylonMesh);
        private _loadMorphTargetsAsync(context, primitive, babylonMesh, babylonGeometry);
        private _loadMorphTargetVertexDataAsync(context, babylonGeometry, attributes, babylonMorphTarget);
        private static _LoadTransform(node, babylonNode);
        private _loadSkinAsync(context, node, mesh, skin);
        private _loadBones(context, skin);
        private _loadBone(node, skin, babylonBones);
        private _loadSkinInverseBindMatricesDataAsync(context, skin);
        private _updateBoneMatrices(babylonSkeleton, inverseBindMatricesData);
        private _getNodeMatrix(node);
        private _loadCamera(context, camera, babylonMesh);
        private _loadAnimationsAsync();
        private _loadAnimationAsync(context, animation);
        private _loadAnimationChannelAsync(context, animationContext, animation, channel, babylonAnimationGroup);
        private _loadAnimationSamplerAsync(context, sampler);
        private _loadBufferAsync(context, buffer);
        _loadBufferViewAsync(context: string, bufferView: _ILoaderBufferView): Promise<ArrayBufferView>;
        private _loadIndicesAccessorAsync(context, accessor);
        private _loadFloatAccessorAsync(context, accessor);
        _loadVertexBufferViewAsync(context: string, bufferView: _ILoaderBufferView, kind: string): Promise<Buffer>;
        private _loadVertexAccessorAsync(context, accessor, kind);
        private _getDefaultMaterial(drawMode);
        private _loadMaterialMetallicRoughnessPropertiesAsync(context, material, babylonMaterial);
        _loadMaterialAsync(context: string, material: _ILoaderMaterial, mesh: _ILoaderMesh, babylonMesh: Mesh, babylonDrawMode: number, assign: (babylonMaterial: Material) => void): Promise<void>;
        _loadMaterialPropertiesAsync(context: string, material: _ILoaderMaterial, babylonMaterial: Material): Promise<void>;
        _createMaterial(name: string, drawMode: number): PBRMaterial;
        _loadMaterialBasePropertiesAsync(context: string, material: _ILoaderMaterial, babylonMaterial: PBRMaterial): Promise<void>;
        _loadMaterialAlphaProperties(context: string, material: _ILoaderMaterial, babylonMaterial: PBRMaterial): void;
        _loadTextureInfoAsync(context: string, textureInfo: ITextureInfo, assign: (babylonTexture: Texture) => void): Promise<void>;
        _loadTextureAsync(context: string, texture: _ILoaderTexture, assign: (babylonTexture: Texture) => void): Promise<void>;
        private _loadSampler(context, sampler);
        _loadImageAsync(context: string, image: _ILoaderImage): Promise<ArrayBufferView>;
        _loadUriAsync(context: string, uri: string): Promise<ArrayBufferView>;
        private _onProgress();
        static _GetProperty<T>(context: string, array: ArrayLike<T> | undefined, index: number | undefined): T;
        private static _GetTextureWrapMode(context, mode);
        private static _GetTextureSamplingMode(context, magFilter?, minFilter?);
        private static _GetTypedArray(context, componentType, bufferView, byteOffset, length);
        private static _GetNumComponents(context, type);
        private static _ValidateUri(uri);
        private static _GetDrawMode(context, mode);
        private _compileMaterialsAsync();
        private _compileShadowGeneratorsAsync();
        _applyExtensions<T>(actionAsync: (extension: GLTFLoaderExtension) => Nullable<Promise<T>>): Nullable<Promise<T>>;
    }
}


declare module BABYLON.GLTF2 {
    /**
     * Abstract class that can be implemented to extend existing glTF loader behavior.
     */
    abstract class GLTFLoaderExtension implements IGLTFLoaderExtension, IDisposable {
        /**
         * Gets or sets a boolean indicating if the extension is enabled
         */
        enabled: boolean;
        /**
         * Gets or sets extension name
         */
        readonly abstract name: string;
        protected _loader: GLTFLoader;
        /**
         * Creates new GLTFLoaderExtension
         * @param loader defines the GLTFLoader to use
         */
        constructor(loader: GLTFLoader);
        /**
         * Release all resources
         */
        dispose(): void;
        /**
         * Override this method to modify the default behavior for loading scenes.
         * @hidden
         */
        protected _loadSceneAsync(context: string, node: _ILoaderScene): Nullable<Promise<void>>;
        /**
         * Override this method to modify the default behavior for loading nodes.
         * @hidden
         */
        protected _loadNodeAsync(context: string, node: _ILoaderNode): Nullable<Promise<void>>;
        /**
         * Override this method to modify the default behavior for loading mesh primitive vertex data.
         * @hidden
         */
        protected _loadVertexDataAsync(context: string, primitive: _ILoaderMeshPrimitive, babylonMesh: Mesh): Nullable<Promise<Geometry>>;
        /**
         * Override this method to modify the default behavior for loading materials.
         * @hidden
         */
        protected _loadMaterialAsync(context: string, material: _ILoaderMaterial, mesh: _ILoaderMesh, babylonMesh: Mesh, babylonDrawMode: number, assign: (babylonMaterial: Material) => void): Nullable<Promise<void>>;
        /**
         * Override this method to modify the default behavior for loading material properties.
         * @hidden
         */
        protected _loadMaterialPropertiesAsync(context: string, material: _ILoaderMaterial, babylonMaterial: Material): Nullable<Promise<void>>;
        /**
         * Override this method to modify the default behavior for loading texture infos.
         * @hidden
         */
        protected _loadTextureInfoAsync(context: string, textureInfo: ITextureInfo, assign: (babylonTexture: Texture) => void): Nullable<Promise<void>>;
        /**
         * Override this method to modify the default behavior for loading textures.
         * @hidden
         */
        protected _loadTextureAsync(context: string, texture: _ILoaderTexture, assign: (babylonTexture: Texture) => void): Nullable<Promise<void>>;
        /**
         * Override this method to modify the default behavior for loading uris.
         * @hidden
         */
        protected _loadUriAsync(context: string, uri: string): Nullable<Promise<ArrayBufferView>>;
        /**
         * Helper method called by a loader extension to load an glTF extension.
         * @hidden
         */
        protected _loadExtensionAsync<TProperty, TResult = void>(context: string, property: IProperty, actionAsync: (extensionContext: string, extension: TProperty) => Nullable<Promise<TResult>>): Nullable<Promise<TResult>>;
        /**
         * Helper method called by the loader to allow extensions to override loading scenes.
         * @hidden
         */
        protected _loadExtrasValueAsync<TProperty, TResult = void>(context: string, property: IProperty, actionAsync: (extensionContext: string, value: TProperty) => Nullable<Promise<TResult>>): Nullable<Promise<TResult>>;
        /**
         * Helper method called by the loader to allow extensions to override loading scenes.
         * @hidden
         */
        static _LoadSceneAsync(loader: GLTFLoader, context: string, scene: _ILoaderScene): Nullable<Promise<void>>;
        /**
         * Helper method called by the loader to allow extensions to override loading nodes.
         * @hidden
         */
        static _LoadNodeAsync(loader: GLTFLoader, context: string, node: _ILoaderNode): Nullable<Promise<void>>;
        /**
         * Helper method called by the loader to allow extensions to override loading mesh primitive vertex data.
         * @hidden
         */
        static _LoadVertexDataAsync(loader: GLTFLoader, context: string, primitive: _ILoaderMeshPrimitive, babylonMesh: Mesh): Nullable<Promise<Geometry>>;
        /**
         * Helper method called by the loader to allow extensions to override loading materials.
         * @hidden
         */
        static _LoadMaterialAsync(loader: GLTFLoader, context: string, material: _ILoaderMaterial, mesh: _ILoaderMesh, babylonMesh: Mesh, babylonDrawMode: number, assign: (babylonMaterial: Material) => void): Nullable<Promise<void>>;
        /**
         * Helper method called by the loader to allow extensions to override loading material properties.
         * @hidden
         */
        static _LoadMaterialPropertiesAsync(loader: GLTFLoader, context: string, material: _ILoaderMaterial, babylonMaterial: Material): Nullable<Promise<void>>;
        /**
         * Helper method called by the loader to allow extensions to override loading texture infos.
         * @hidden
         */
        static _LoadTextureInfoAsync(loader: GLTFLoader, context: string, textureInfo: ITextureInfo, assign: (babylonTexture: Texture) => void): Nullable<Promise<void>>;
        /**
         * Helper method called by the loader to allow extensions to override loading textures.
         * @hidden
         */
        static _LoadTextureAsync(loader: GLTFLoader, context: string, texture: _ILoaderTexture, assign: (babylonTexture: Texture) => void): Nullable<Promise<void>>;
        /**
         * Helper method called by the loader to allow extensions to override loading uris.
         * @hidden
         */
        static _LoadUriAsync(loader: GLTFLoader, context: string, uri: string): Nullable<Promise<ArrayBufferView>>;
    }
}
/**
 * Defines the module of the glTF 2.0 loader extensions.
 */
declare module BABYLON.GLTF2.Extensions {
}


declare module BABYLON.GLTF2.Extensions {
    /**
     * [Specification](https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Vendor/MSFT_lod)
     */
    class MSFT_lod extends GLTFLoaderExtension {
        readonly name: string;
        /**
         * Maximum number of LODs to load, starting from the lowest LOD.
         */
        maxLODsToLoad: number;
        /**
         * Observable raised when all node LODs of one level are loaded.
         * The event data is the index of the loaded LOD starting from zero.
         * Dispose the loader to cancel the loading of the next level of LODs.
         */
        onNodeLODsLoadedObservable: Observable<number>;
        /**
         * Observable raised when all material LODs of one level are loaded.
         * The event data is the index of the loaded LOD starting from zero.
         * Dispose the loader to cancel the loading of the next level of LODs.
         */
        onMaterialLODsLoadedObservable: Observable<number>;
        private _nodeIndexLOD;
        private _nodeSignalLODs;
        private _nodePromiseLODs;
        private _materialIndexLOD;
        private _materialSignalLODs;
        private _materialPromiseLODs;
        constructor(loader: GLTFLoader);
        dispose(): void;
        protected _loadNodeAsync(context: string, node: _ILoaderNode): Nullable<Promise<void>>;
        protected _loadMaterialAsync(context: string, material: _ILoaderMaterial, mesh: _ILoaderMesh, babylonMesh: Mesh, babylonDrawMode: number, assign: (babylonMaterial: Material) => void): Nullable<Promise<void>>;
        protected _loadUriAsync(context: string, uri: string): Nullable<Promise<ArrayBufferView>>;
        /**
         * Gets an array of LOD properties from lowest to highest.
         */
        private _getLODs<T>(context, property, array, ids);
        private _disposeUnusedMaterials();
    }
}


declare module BABYLON.GLTF2.Extensions {
    /** @hidden */
    class MSFT_minecraftMesh extends GLTFLoaderExtension {
        readonly name: string;
        protected _loadMaterialAsync(context: string, material: _ILoaderMaterial, mesh: _ILoaderMesh, babylonMesh: Mesh, babylonDrawMode: number, assign: (babylonMaterial: Material) => void): Nullable<Promise<void>>;
    }
}


declare module BABYLON.GLTF2.Extensions {
    /** @hidden */
    class MSFT_sRGBFactors extends GLTFLoaderExtension {
        readonly name: string;
        protected _loadMaterialAsync(context: string, material: _ILoaderMaterial, mesh: _ILoaderMesh, babylonMesh: Mesh, babylonDrawMode: number, assign: (babylonMaterial: Material) => void): Nullable<Promise<void>>;
    }
}


declare module BABYLON.GLTF2.Extensions {
    /**
     * [Specification](https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_draco_mesh_compression)
     */
    class KHR_draco_mesh_compression extends GLTFLoaderExtension {
        readonly name: string;
        private _dracoCompression;
        constructor(loader: GLTFLoader);
        dispose(): void;
        protected _loadVertexDataAsync(context: string, primitive: _ILoaderMeshPrimitive, babylonMesh: Mesh): Nullable<Promise<Geometry>>;
    }
}


declare module BABYLON.GLTF2.Extensions {
    /**
     * [Specification](https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_materials_pbrSpecularGlossiness)
     */
    class KHR_materials_pbrSpecularGlossiness extends GLTFLoaderExtension {
        readonly name: string;
        protected _loadMaterialPropertiesAsync(context: string, material: _ILoaderMaterial, babylonMaterial: Material): Nullable<Promise<void>>;
        private _loadSpecularGlossinessPropertiesAsync(context, material, properties, babylonMaterial);
    }
}


declare module BABYLON.GLTF2.Extensions {
    /**
     * [Specification](https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_materials_unlit)
     */
    class KHR_materials_unlit extends GLTFLoaderExtension {
        readonly name: string;
        protected _loadMaterialPropertiesAsync(context: string, material: _ILoaderMaterial, babylonMaterial: Material): Nullable<Promise<void>>;
        private _loadUnlitPropertiesAsync(context, material, babylonMaterial);
    }
}


declare module BABYLON.GLTF2.Extensions {
    /**
     * [Specification](https://github.com/MiiBond/glTF/tree/khr_lights_v1/extensions/Khronos/KHR_lights) (Experimental)
     */
    class KHR_lights extends GLTFLoaderExtension {
        readonly name: string;
        protected _loadSceneAsync(context: string, scene: _ILoaderScene): Nullable<Promise<void>>;
        protected _loadNodeAsync(context: string, node: _ILoaderNode): Nullable<Promise<void>>;
        private readonly _lights;
    }
}


declare module BABYLON.GLTF2.Extensions {
    /**
     * [Specification](https://github.com/AltspaceVR/glTF/blob/avr-sampler-offset-tile/extensions/2.0/Khronos/KHR_texture_transform/README.md) (Experimental)
     */
    class KHR_texture_transform extends GLTFLoaderExtension {
        readonly name: string;
        protected _loadTextureInfoAsync(context: string, textureInfo: ITextureInfo, assign: (babylonTexture: Texture) => void): Nullable<Promise<void>>;
    }
}


declare module BABYLON.GLTF2.Extensions {
    /**
     * [Specification](TODO) (Experimental)
     */
    class EXT_lights_imageBased extends GLTFLoaderExtension {
        readonly name: string;
        protected _loadSceneAsync(context: string, scene: _ILoaderScene): Nullable<Promise<void>>;
        private _loadLightAsync(context, light);
        private readonly _lights;
    }
}