Babylon.js/src/Mesh/geometry.ts

    
    import { Tools, Tags } from "Tools";
    import { Nullable, FloatArray, DataArray, IndicesArray } from "types";
    import { Scene } from "scene";
    import { Vector3, Vector2, Color4 } from "Math";
    import { Engine } from "Engine";
    import { Mesh, AbstractMesh, VertexBuffer, SubMesh, IGetSetVerticesData, VertexData } from "Mesh";
    import { Effect } from "Materials";
    import { SceneLoader } from "Loading";
import { BoundingInfo } from "index";
    /**
     * Class used to store geometry data (vertex buffers + index buffer)
     */
    export class Geometry implements IGetSetVerticesData {
        // Members
        /**
         * Gets or sets the unique ID of the geometry
         */
        public id: string;
        /**
         * Gets the delay loading state of the geometry (none by default which means not delayed)
         */
        public delayLoadState = Engine.DELAYLOADSTATE_NONE;
        /**
         * Gets the file containing the data to load when running in delay load state
         */
        public delayLoadingFile: Nullable<string>;
        /**
         * Callback called when the geometry is updated
         */
        public onGeometryUpdated: (geometry: Geometry, kind?: string) => void;

        // Private
        private _scene: Scene;
        private _engine: Engine;
        private _meshes: Mesh[];
        private _totalVertices = 0;
        /** @hidden */
        public _indices: IndicesArray;
        /** @hidden */
        public _vertexBuffers: { [key: string]: VertexBuffer; };
        private _isDisposed = false;
        private _extend: { minimum: Vector3, maximum: Vector3 };
        private _boundingBias: Vector2;
        /** @hidden */
        public _delayInfo: Array<string>;
        private _indexBuffer: Nullable<WebGLBuffer>;
        private _indexBufferIsUpdatable = false;
        /** @hidden */
        public _boundingInfo: Nullable<BoundingInfo>;
        /** @hidden */
        public _delayLoadingFunction: Nullable<(any: any, geometry: Geometry) => void>;
        /** @hidden */
        public _softwareSkinningFrameId: number;
        private _vertexArrayObjects: { [key: string]: WebGLVertexArrayObject; };
        private _updatable: boolean;

        // Cache
        /** @hidden */
        public _positions: Nullable<Vector3[]>;

        /**
         *  Gets or sets the Bias Vector to apply on the bounding elements (box/sphere), the max extend is computed as v += v * bias.x + bias.y, the min is computed as v -= v * bias.x + bias.y
         */
        public get boundingBias(): Vector2 {
            return this._boundingBias;
        }

        /**
         *  Gets or sets the Bias Vector to apply on the bounding elements (box/sphere), the max extend is computed as v += v * bias.x + bias.y, the min is computed as v -= v * bias.x + bias.y
         */
        public set boundingBias(value: Vector2) {
            if (this._boundingBias) {
                this._boundingBias.copyFrom(value);
            }
            else {
                this._boundingBias = value.clone();
            }

            this._updateBoundingInfo(true, null);
        }

        /**
         * Static function used to attach a new empty geometry to a mesh
         * @param mesh defines the mesh to attach the geometry to
         * @returns the new Geometry
         */
        public static CreateGeometryForMesh(mesh: Mesh): Geometry {
            let geometry = new Geometry(Geometry.RandomId(), mesh.getScene());

            geometry.applyToMesh(mesh);

            return geometry;
        }

        /**
         * Creates a new geometry
         * @param id defines the unique ID
         * @param scene defines the hosting scene
         * @param vertexData defines the VertexData used to get geometry data
         * @param updatable defines if geometry must be updatable (false by default)
         * @param mesh defines the mesh that will be associated with the geometry
         */
        constructor(id: string, scene: Scene, vertexData?: VertexData, updatable: boolean = false, mesh: Nullable<Mesh> = null) {
            this.id = id;
            this._engine = scene.getEngine();
            this._meshes = [];
            this._scene = scene;
            //Init vertex buffer cache
            this._vertexBuffers = {};
            this._indices = [];
            this._updatable = updatable;

            // vertexData
            if (vertexData) {
                this.setAllVerticesData(vertexData, updatable);
            }
            else {
                this._totalVertices = 0;
                this._indices = [];
            }

            if (this._engine.getCaps().vertexArrayObject) {
                this._vertexArrayObjects = {};
            }

            // applyToMesh
            if (mesh) {
                this.applyToMesh(mesh);
                mesh.computeWorldMatrix(true);
            }
        }

        /**
         * Gets the current extend of the geometry
         */
        public get extend(): { minimum: Vector3, maximum: Vector3 } {
            return this._extend;
        }

        /**
         * Gets the hosting scene
         * @returns the hosting Scene
         */
        public getScene(): Scene {
            return this._scene;
        }

        /**
         * Gets the hosting engine
         * @returns the hosting Engine
         */
        public getEngine(): Engine {
            return this._engine;
        }

        /**
         * Defines if the geometry is ready to use
         * @returns true if the geometry is ready to be used
         */
        public isReady(): boolean {
            return this.delayLoadState === Engine.DELAYLOADSTATE_LOADED || this.delayLoadState === Engine.DELAYLOADSTATE_NONE;
        }

        /**
         * Gets a value indicating that the geometry should not be serialized
         */
        public get doNotSerialize(): boolean {
            for (var index = 0; index < this._meshes.length; index++) {
                if (!this._meshes[index].doNotSerialize) {
                    return false;
                }
            }

            return true;
        }

        /** @hidden */
        public _rebuild(): void {
            if (this._vertexArrayObjects) {
                this._vertexArrayObjects = {};
            }

            // Index buffer
            if (this._meshes.length !== 0 && this._indices) {
                this._indexBuffer = this._engine.createIndexBuffer(this._indices);
            }

            // Vertex buffers
            for (var key in this._vertexBuffers) {
                let vertexBuffer = <VertexBuffer>this._vertexBuffers[key];
                vertexBuffer._rebuild();
            }
        }

        /**
         * Affects all geometry data in one call
         * @param vertexData defines the geometry data
         * @param updatable defines if the geometry must be flagged as updatable (false as default)
         */
        public setAllVerticesData(vertexData: VertexData, updatable?: boolean): void {
            vertexData.applyToGeometry(this, updatable);
            this.notifyUpdate();
        }

        /**
         * Set specific vertex data
         * @param kind defines the data kind (Position, normal, etc...)
         * @param data defines the vertex data to use
         * @param updatable defines if the vertex must be flagged as updatable (false as default)
         * @param stride defines the stride to use (0 by default). This value is deduced from the kind value if not specified
         */
        public setVerticesData(kind: string, data: FloatArray, updatable: boolean = false, stride?: number): void {
            var buffer = new VertexBuffer(this._engine, data, kind, updatable, this._meshes.length === 0, stride);
            this.setVerticesBuffer(buffer);
        }

        /**
         * Removes a specific vertex data
         * @param kind defines the data kind (Position, normal, etc...)
         */
        public removeVerticesData(kind: string) {
            if (this._vertexBuffers[kind]) {
                this._vertexBuffers[kind].dispose();
                delete this._vertexBuffers[kind];
            }
        }

        /**
         * Affect a vertex buffer to the geometry. the vertexBuffer.getKind() function is used to determine where to store the data
         * @param buffer defines the vertex buffer to use
         * @param totalVertices defines the total number of vertices for position kind (could be null)
         */
        public setVerticesBuffer(buffer: VertexBuffer, totalVertices: Nullable<number> = null): void {
            var kind = buffer.getKind();
            if (this._vertexBuffers[kind]) {
                this._vertexBuffers[kind].dispose();
            }

            this._vertexBuffers[kind] = buffer;

            if (kind === VertexBuffer.PositionKind) {
                var data = <FloatArray>buffer.getData();
                if (totalVertices != null) {
                    this._totalVertices = totalVertices;
                } else {
                    if (data != null) {
                        this._totalVertices = data.length / (buffer.byteStride / 4);
                    }
                }

                this._updateExtend(data);
                this._resetPointsArrayCache();

                var meshes = this._meshes;
                var numOfMeshes = meshes.length;

                for (var index = 0; index < numOfMeshes; index++) {
                    var mesh = meshes[index];
                    mesh._boundingInfo = new BoundingInfo(this._extend.minimum, this._extend.maximum);
                    mesh._createGlobalSubMesh(false);
                    mesh.computeWorldMatrix(true);
                }
            }

            this.notifyUpdate(kind);

            if (this._vertexArrayObjects) {
                this._disposeVertexArrayObjects();
                this._vertexArrayObjects = {}; // Will trigger a rebuild of the VAO if supported
            }
        }

        /**
         * Update a specific vertex buffer
         * This function will directly update the underlying WebGLBuffer according to the passed numeric array or Float32Array
         * It will do nothing if the buffer is not updatable
         * @param kind defines the data kind (Position, normal, etc...)
         * @param data defines the data to use
         * @param offset defines the offset in the target buffer where to store the data
         * @param useBytes set to true if the offset is in bytes
         */
        public updateVerticesDataDirectly(kind: string, data: DataArray, offset: number, useBytes: boolean = false): void {
            var vertexBuffer = this.getVertexBuffer(kind);

            if (!vertexBuffer) {
                return;
            }

            vertexBuffer.updateDirectly(data, offset, useBytes);
            this.notifyUpdate(kind);
        }

        /**
         * Update a specific vertex buffer
         * This function will create a new buffer if the current one is not updatable
         * @param kind defines the data kind (Position, normal, etc...)
         * @param data defines the data to use
         * @param updateExtends defines if the geometry extends must be recomputed (false by default)
         */
        public updateVerticesData(kind: string, data: FloatArray, updateExtends: boolean = false): void {
            var vertexBuffer = this.getVertexBuffer(kind);

            if (!vertexBuffer) {
                return;
            }

            vertexBuffer.update(data);

            if (kind === VertexBuffer.PositionKind) {
                this._updateBoundingInfo(updateExtends, data);
            }
            this.notifyUpdate(kind);
        }

        private _updateBoundingInfo(updateExtends: boolean, data: Nullable<FloatArray>) {
            if (updateExtends) {
                this._updateExtend(data);
            }

            this._resetPointsArrayCache();

            if (updateExtends) {
                var meshes = this._meshes;
                for (const mesh of meshes) {
                    if (mesh._boundingInfo) {
                        mesh._boundingInfo.reConstruct(this._extend.minimum, this._extend.maximum);
                    }
                    else {
                        mesh._boundingInfo = new BoundingInfo(this._extend.minimum, this._extend.maximum);
                    }

                    const subMeshes = mesh.subMeshes;
                    for (const subMesh of subMeshes) {
                        subMesh.refreshBoundingInfo();
                    }
                }
            }
        }

        /** @hidden */
        public _bind(effect: Nullable<Effect>, indexToBind?: Nullable<WebGLBuffer>): void {
            if (!effect) {
                return;
            }

            if (indexToBind === undefined) {
                indexToBind = this._indexBuffer;
            }
            let vbs = this.getVertexBuffers();

            if (!vbs) {
                return;
            }

            if (indexToBind != this._indexBuffer || !this._vertexArrayObjects) {
                this._engine.bindBuffers(vbs, indexToBind, effect);
                return;
            }

            // Using VAO
            if (!this._vertexArrayObjects[effect.key]) {
                this._vertexArrayObjects[effect.key] = this._engine.recordVertexArrayObject(vbs, indexToBind, effect);
            }

            this._engine.bindVertexArrayObject(this._vertexArrayObjects[effect.key], indexToBind);
        }

        /**
         * Gets total number of vertices
         * @returns the total number of vertices
         */
        public getTotalVertices(): number {
            if (!this.isReady()) {
                return 0;
            }

            return this._totalVertices;
        }

        /**
         * Gets a specific vertex data attached to this geometry. Float data is constructed if the vertex buffer data cannot be returned directly.
         * @param kind defines the data kind (Position, normal, etc...)
         * @param copyWhenShared defines if the returned array must be cloned upon returning it if the current geometry is shared between multiple meshes
         * @param forceCopy defines a boolean indicating that the returned array must be cloned upon returning it
         * @returns a float array containing vertex data
         */
        public getVerticesData(kind: string, copyWhenShared?: boolean, forceCopy?: boolean): Nullable<FloatArray> {
            const vertexBuffer = this.getVertexBuffer(kind);
            if (!vertexBuffer) {
                return null;
            }

            let data = vertexBuffer.getData();
            if (!data) {
                return null;
            }

            const tightlyPackedByteStride = vertexBuffer.getSize() * VertexBuffer.GetTypeByteLength(vertexBuffer.type);
            const count = this._totalVertices * vertexBuffer.getSize();

            if (vertexBuffer.type !== VertexBuffer.FLOAT || vertexBuffer.byteStride !== tightlyPackedByteStride) {
                const copy : number[] = [];
                vertexBuffer.forEach(count, (value) => copy.push(value));
                return copy;
            }

            if (!((data instanceof Array) || (data instanceof Float32Array)) || vertexBuffer.byteOffset !== 0 || data.length !== count) {
                if (data instanceof Array) {
                    const offset = vertexBuffer.byteOffset / 4;
                    return Tools.Slice(data, offset, offset + count);
                }
                else if (data instanceof ArrayBuffer) {
                    return new Float32Array(data, vertexBuffer.byteOffset, count);
                }
                else {
                    const offset = data.byteOffset + vertexBuffer.byteOffset;
                    if (forceCopy || (copyWhenShared && this._meshes.length !== 1)) {
                        let result = new Float32Array(count);
                        let source = new Float32Array(data.buffer, offset, count);

                        result.set(source);

                        return result;
                    }
                    return new Float32Array(data.buffer, offset, count);
                }
            }

            if (forceCopy || (copyWhenShared && this._meshes.length !== 1)) {
                return Tools.Slice(data);
            }

            return data;
        }

        /**
         * Returns a boolean defining if the vertex data for the requested `kind` is updatable
         * @param kind defines the data kind (Position, normal, etc...)
         * @returns true if the vertex buffer with the specified kind is updatable
         */
        public isVertexBufferUpdatable(kind: string): boolean {
            let vb = this._vertexBuffers[kind];

            if (!vb) {
                return false;
            }

            return vb.isUpdatable();
        }

        /**
         * Gets a specific vertex buffer
         * @param kind defines the data kind (Position, normal, etc...)
         * @returns a VertexBuffer
         */
        public getVertexBuffer(kind: string): Nullable<VertexBuffer> {
            if (!this.isReady()) {
                return null;
            }
            return this._vertexBuffers[kind];
        }

        /**
         * Returns all vertex buffers
         * @return an object holding all vertex buffers indexed by kind
         */
        public getVertexBuffers(): Nullable<{ [key: string]: VertexBuffer; }> {
            if (!this.isReady()) {
                return null;
            }
            return this._vertexBuffers;
        }

        /**
         * Gets a boolean indicating if specific vertex buffer is present
         * @param kind defines the data kind (Position, normal, etc...)
         * @returns true if data is present
         */
        public isVerticesDataPresent(kind: string): boolean {
            if (!this._vertexBuffers) {
                if (this._delayInfo) {
                    return this._delayInfo.indexOf(kind) !== -1;
                }
                return false;
            }
            return this._vertexBuffers[kind] !== undefined;
        }

        /**
         * Gets a list of all attached data kinds (Position, normal, etc...)
         * @returns a list of string containing all kinds
         */
        public getVerticesDataKinds(): string[] {
            var result = [];
            var kind;
            if (!this._vertexBuffers && this._delayInfo) {
                for (kind in this._delayInfo) {
                    result.push(kind);
                }
            } else {
                for (kind in this._vertexBuffers) {
                    result.push(kind);
                }
            }

            return result;
        }

        /**
         * Update index buffer
         * @param indices defines the indices to store in the index buffer
         * @param offset defines the offset in the target buffer where to store the data
         */
        public updateIndices(indices: IndicesArray, offset?: number): void {
            if (!this._indexBuffer) {
                return;
            }

            if (!this._indexBufferIsUpdatable) {
                this.setIndices(indices, null, true);
            } else {
                this._engine.updateDynamicIndexBuffer(this._indexBuffer, indices, offset);
            }
        }

        /**
         * Creates a new index buffer
         * @param indices defines the indices to store in the index buffer
         * @param totalVertices defines the total number of vertices (could be null)
         * @param updatable defines if the index buffer must be flagged as updatable (false by default)
         */
        public setIndices(indices: IndicesArray, totalVertices: Nullable<number> = null, updatable: boolean = false): void {
            if (this._indexBuffer) {
                this._engine._releaseBuffer(this._indexBuffer);
            }

            this._disposeVertexArrayObjects();

            this._indices = indices;
            this._indexBufferIsUpdatable = updatable;
            if (this._meshes.length !== 0 && this._indices) {
                this._indexBuffer = this._engine.createIndexBuffer(this._indices, updatable);
            }

            if (totalVertices != undefined) { // including null and undefined
                this._totalVertices = totalVertices;
            }

            var meshes = this._meshes;
            var numOfMeshes = meshes.length;

            for (var index = 0; index < numOfMeshes; index++) {
                meshes[index]._createGlobalSubMesh(true);
            }
            this.notifyUpdate();
        }

        /**
         * Return the total number of indices
         * @returns the total number of indices
         */
        public getTotalIndices(): number {
            if (!this.isReady()) {
                return 0;
            }
            return this._indices.length;
        }

        /**
         * Gets the index buffer array
         * @param copyWhenShared defines if the returned array must be cloned upon returning it if the current geometry is shared between multiple meshes
         * @param forceCopy defines a boolean indicating that the returned array must be cloned upon returning it
         * @returns the index buffer array
         */
        public getIndices(copyWhenShared?: boolean, forceCopy?: boolean): Nullable<IndicesArray> {
            if (!this.isReady()) {
                return null;
            }
            var orig = this._indices;
            if (!forceCopy && (!copyWhenShared || this._meshes.length === 1)) {
                return orig;
            } else {
                var len = orig.length;
                var copy = [];
                for (var i = 0; i < len; i++) {
                    copy.push(orig[i]);
                }
                return copy;
            }
        }

        /**
         * Gets the index buffer
         * @return the index buffer
         */
        public getIndexBuffer(): Nullable<WebGLBuffer> {
            if (!this.isReady()) {
                return null;
            }
            return this._indexBuffer;
        }

        /** @hidden */
        public _releaseVertexArrayObject(effect: Nullable<Effect> = null) {
            if (!effect || !this._vertexArrayObjects) {
                return;
            }

            if (this._vertexArrayObjects[effect.key]) {
                this._engine.releaseVertexArrayObject(this._vertexArrayObjects[effect.key]);
                delete this._vertexArrayObjects[effect.key];
            }
        }

        /**
         * Release the associated resources for a specific mesh
         * @param mesh defines the source mesh
         * @param shouldDispose defines if the geometry must be disposed if there is no more mesh pointing to it
         */
        public releaseForMesh(mesh: Mesh, shouldDispose?: boolean): void {
            var meshes = this._meshes;
            var index = meshes.indexOf(mesh);

            if (index === -1) {
                return;
            }

            meshes.splice(index, 1);

            mesh._geometry = null;

            if (meshes.length === 0 && shouldDispose) {
                this.dispose();
            }
        }

        /**
         * Apply current geometry to a given mesh
         * @param mesh defines the mesh to apply geometry to
         */
        public applyToMesh(mesh: Mesh): void {
            if (mesh._geometry === this) {
                return;
            }

            var previousGeometry = mesh._geometry;
            if (previousGeometry) {
                previousGeometry.releaseForMesh(mesh);
            }

            var meshes = this._meshes;

            // must be done before setting vertexBuffers because of mesh._createGlobalSubMesh()
            mesh._geometry = this;

            this._scene.pushGeometry(this);

            meshes.push(mesh);

            if (this.isReady()) {
                this._applyToMesh(mesh);
            }
            else {
                mesh._boundingInfo = this._boundingInfo;
            }
        }

        private _updateExtend(data: Nullable<FloatArray> = null) {
            if (!data) {
                data = this.getVerticesData(VertexBuffer.PositionKind)!;
            }

            this._extend = Tools.ExtractMinAndMax(data, 0, this._totalVertices, this.boundingBias, 3);
        }

        private _applyToMesh(mesh: Mesh): void {
            var numOfMeshes = this._meshes.length;

            // vertexBuffers
            for (var kind in this._vertexBuffers) {
                if (numOfMeshes === 1) {
                    this._vertexBuffers[kind].create();
                }
                var buffer = this._vertexBuffers[kind].getBuffer();
                if (buffer) {
                    buffer.references = numOfMeshes;
                }

                if (kind === VertexBuffer.PositionKind) {
                    if (!this._extend) {
                        this._updateExtend();
                    }
                    mesh._boundingInfo = new BoundingInfo(this._extend.minimum, this._extend.maximum);

                    mesh._createGlobalSubMesh(false);

                    //bounding info was just created again, world matrix should be applied again.
                    mesh._updateBoundingInfo();
                }
            }

            // indexBuffer
            if (numOfMeshes === 1 && this._indices && this._indices.length > 0) {
                this._indexBuffer = this._engine.createIndexBuffer(this._indices);
            }
            if (this._indexBuffer) {
                this._indexBuffer.references = numOfMeshes;
            }

            // morphTargets
            mesh._syncGeometryWithMorphTargetManager();

            // instances
            mesh.synchronizeInstances();
        }

        private notifyUpdate(kind?: string) {
            if (this.onGeometryUpdated) {
                this.onGeometryUpdated(this, kind);
            }

            for (var mesh of this._meshes) {
                mesh._markSubMeshesAsAttributesDirty();
            }
        }

        /**
         * Load the geometry if it was flagged as delay loaded
         * @param scene defines the hosting scene
         * @param onLoaded defines a callback called when the geometry is loaded
         */
        public load(scene: Scene, onLoaded?: () => void): void {
            if (this.delayLoadState === Engine.DELAYLOADSTATE_LOADING) {
                return;
            }

            if (this.isReady()) {
                if (onLoaded) {
                    onLoaded();
                }
                return;
            }

            this.delayLoadState = Engine.DELAYLOADSTATE_LOADING;

            this._queueLoad(scene, onLoaded);
        }

        private _queueLoad(scene: Scene, onLoaded?: () => void): void {
            if (!this.delayLoadingFile) {
                return;
            }

            scene._addPendingData(this);
            scene._loadFile(this.delayLoadingFile, (data) => {
                if (!this._delayLoadingFunction) {
                    return;
                }

                this._delayLoadingFunction(JSON.parse(data as string), this);

                this.delayLoadState = Engine.DELAYLOADSTATE_LOADED;
                this._delayInfo = [];

                scene._removePendingData(this);

                var meshes = this._meshes;
                var numOfMeshes = meshes.length;
                for (var index = 0; index < numOfMeshes; index++) {
                    this._applyToMesh(meshes[index]);
                }

                if (onLoaded) {
                    onLoaded();
                }
            }, undefined, true);
        }

        /**
         * Invert the geometry to move from a right handed system to a left handed one.
         */
        public toLeftHanded(): void {

            // Flip faces
            let tIndices = this.getIndices(false);
            if (tIndices != null && tIndices.length > 0) {
                for (let i = 0; i < tIndices.length; i += 3) {
                    let tTemp = tIndices[i + 0];
                    tIndices[i + 0] = tIndices[i + 2];
                    tIndices[i + 2] = tTemp;
                }
                this.setIndices(tIndices);
            }

            // Negate position.z
            let tPositions = this.getVerticesData(VertexBuffer.PositionKind, false);
            if (tPositions != null && tPositions.length > 0) {
                for (let i = 0; i < tPositions.length; i += 3) {
                    tPositions[i + 2] = -tPositions[i + 2];
                }
                this.setVerticesData(VertexBuffer.PositionKind, tPositions, false);
            }

            // Negate normal.z
            let tNormals = this.getVerticesData(VertexBuffer.NormalKind, false);
            if (tNormals != null && tNormals.length > 0) {
                for (let i = 0; i < tNormals.length; i += 3) {
                    tNormals[i + 2] = -tNormals[i + 2];
                }
                this.setVerticesData(VertexBuffer.NormalKind, tNormals, false);
            }
        }

        // Cache
        /** @hidden */
        public _resetPointsArrayCache(): void {
            this._positions = null;
        }

        /** @hidden */
        public _generatePointsArray(): boolean {
            if (this._positions) {
                return true;
            }

            var data = this.getVerticesData(VertexBuffer.PositionKind);

            if (!data || data.length === 0) {
                return false;
            }

            this._positions = [];

            for (var index = 0; index < data.length; index += 3) {
                this._positions.push(Vector3.FromArray(data, index));
            }

            return true;
        }

        /**
         * Gets a value indicating if the geometry is disposed
         * @returns true if the geometry was disposed
         */
        public isDisposed(): boolean {
            return this._isDisposed;
        }

        private _disposeVertexArrayObjects(): void {
            if (this._vertexArrayObjects) {
                for (var kind in this._vertexArrayObjects) {
                    this._engine.releaseVertexArrayObject(this._vertexArrayObjects[kind]);
                }
                this._vertexArrayObjects = {};
            }
        }

        /**
         * Free all associated resources
         */
        public dispose(): void {
            var meshes = this._meshes;
            var numOfMeshes = meshes.length;
            var index: number;
            for (index = 0; index < numOfMeshes; index++) {
                this.releaseForMesh(meshes[index]);
            }
            this._meshes = [];

            this._disposeVertexArrayObjects();

            for (var kind in this._vertexBuffers) {
                this._vertexBuffers[kind].dispose();
            }
            this._vertexBuffers = {};
            this._totalVertices = 0;

            if (this._indexBuffer) {
                this._engine._releaseBuffer(this._indexBuffer);
            }
            this._indexBuffer = null;
            this._indices = [];

            this.delayLoadState = Engine.DELAYLOADSTATE_NONE;
            this.delayLoadingFile = null;
            this._delayLoadingFunction = null;
            this._delayInfo = [];

            this._boundingInfo = null;

            this._scene.removeGeometry(this);
            this._isDisposed = true;
        }

        /**
         * Clone the current geometry into a new geometry
         * @param id defines the unique ID of the new geometry
         * @returns a new geometry object
         */
        public copy(id: string): Geometry {
            var vertexData = new VertexData();

            vertexData.indices = [];

            var indices = this.getIndices();
            if (indices) {
                for (var index = 0; index < indices.length; index++) {
                    (<number[]>vertexData.indices).push(indices[index]);
                }
            }

            var updatable = false;
            var stopChecking = false;
            var kind;
            for (kind in this._vertexBuffers) {
                // using slice() to make a copy of the array and not just reference it
                var data = this.getVerticesData(kind);

                if (data instanceof Float32Array) {
                    vertexData.set(new Float32Array(<Float32Array>data), kind);
                } else {
                    vertexData.set((<number[]>data).slice(0), kind);
                }
                if (!stopChecking) {
                    let vb = this.getVertexBuffer(kind);

                    if (vb) {
                        updatable = vb.isUpdatable();
                        stopChecking = !updatable;
                    }
                }
            }

            var geometry = new Geometry(id, this._scene, vertexData, updatable);

            geometry.delayLoadState = this.delayLoadState;
            geometry.delayLoadingFile = this.delayLoadingFile;
            geometry._delayLoadingFunction = this._delayLoadingFunction;

            for (kind in this._delayInfo) {
                geometry._delayInfo = geometry._delayInfo || [];
                geometry._delayInfo.push(kind);
            }

            // Bounding info
            geometry._boundingInfo = new BoundingInfo(this._extend.minimum, this._extend.maximum);

            return geometry;
        }

        /**
         * Serialize the current geometry info (and not the vertices data) into a JSON object
         * @return a JSON representation of the current geometry data (without the vertices data)
         */
        public serialize(): any {
            var serializationObject: any = {};

            serializationObject.id = this.id;
            serializationObject.updatable = this._updatable;

            if (Tags && Tags.HasTags(this)) {
                serializationObject.tags = Tags.GetTags(this);
            }

            return serializationObject;
        }

        private toNumberArray(origin: Nullable<Float32Array | IndicesArray>): number[] {
            if (Array.isArray(origin)) {
                return origin;
            } else {
                return Array.prototype.slice.call(origin);
            }
        }

        /**
         * Serialize all vertices data into a JSON oject
         * @returns a JSON representation of the current geometry data
         */
        public serializeVerticeData(): any {
            var serializationObject = this.serialize();

            if (this.isVerticesDataPresent(VertexBuffer.PositionKind)) {
                serializationObject.positions = this.toNumberArray(this.getVerticesData(VertexBuffer.PositionKind));
                if (this.isVertexBufferUpdatable(VertexBuffer.PositionKind)) {
                    serializationObject.positions._updatable = true;
                }
            }

            if (this.isVerticesDataPresent(VertexBuffer.NormalKind)) {
                serializationObject.normals = this.toNumberArray(this.getVerticesData(VertexBuffer.NormalKind));
                if (this.isVertexBufferUpdatable(VertexBuffer.NormalKind)) {
                    serializationObject.normals._updatable = true;
                }
            }

            if (this.isVerticesDataPresent(VertexBuffer.TangentKind)) {
                serializationObject.tangets = this.toNumberArray(this.getVerticesData(VertexBuffer.TangentKind));
                if (this.isVertexBufferUpdatable(VertexBuffer.TangentKind)) {
                    serializationObject.tangets._updatable = true;
                }
            }

            if (this.isVerticesDataPresent(VertexBuffer.UVKind)) {
                serializationObject.uvs = this.toNumberArray(this.getVerticesData(VertexBuffer.UVKind));
                if (this.isVertexBufferUpdatable(VertexBuffer.UVKind)) {
                    serializationObject.uvs._updatable = true;
                }
            }

            if (this.isVerticesDataPresent(VertexBuffer.UV2Kind)) {
                serializationObject.uv2s = this.toNumberArray(this.getVerticesData(VertexBuffer.UV2Kind));
                if (this.isVertexBufferUpdatable(VertexBuffer.UV2Kind)) {
                    serializationObject.uv2s._updatable = true;
                }
            }

            if (this.isVerticesDataPresent(VertexBuffer.UV3Kind)) {
                serializationObject.uv3s = this.toNumberArray(this.getVerticesData(VertexBuffer.UV3Kind));
                if (this.isVertexBufferUpdatable(VertexBuffer.UV3Kind)) {
                    serializationObject.uv3s._updatable = true;
                }
            }

            if (this.isVerticesDataPresent(VertexBuffer.UV4Kind)) {
                serializationObject.uv4s = this.toNumberArray(this.getVerticesData(VertexBuffer.UV4Kind));
                if (this.isVertexBufferUpdatable(VertexBuffer.UV4Kind)) {
                    serializationObject.uv4s._updatable = true;
                }
            }

            if (this.isVerticesDataPresent(VertexBuffer.UV5Kind)) {
                serializationObject.uv5s = this.toNumberArray(this.getVerticesData(VertexBuffer.UV5Kind));
                if (this.isVertexBufferUpdatable(VertexBuffer.UV5Kind)) {
                    serializationObject.uv5s._updatable = true;
                }
            }

            if (this.isVerticesDataPresent(VertexBuffer.UV6Kind)) {
                serializationObject.uv6s = this.toNumberArray(this.getVerticesData(VertexBuffer.UV6Kind));
                if (this.isVertexBufferUpdatable(VertexBuffer.UV6Kind)) {
                    serializationObject.uv6s._updatable = true;
                }
            }

            if (this.isVerticesDataPresent(VertexBuffer.ColorKind)) {
                serializationObject.colors = this.toNumberArray(this.getVerticesData(VertexBuffer.ColorKind));
                if (this.isVertexBufferUpdatable(VertexBuffer.ColorKind)) {
                    serializationObject.colors._updatable = true;
                }
            }

            if (this.isVerticesDataPresent(VertexBuffer.MatricesIndicesKind)) {
                serializationObject.matricesIndices = this.toNumberArray(this.getVerticesData(VertexBuffer.MatricesIndicesKind));
                serializationObject.matricesIndices._isExpanded = true;
                if (this.isVertexBufferUpdatable(VertexBuffer.MatricesIndicesKind)) {
                    serializationObject.matricesIndices._updatable = true;
                }
            }

            if (this.isVerticesDataPresent(VertexBuffer.MatricesWeightsKind)) {
                serializationObject.matricesWeights = this.toNumberArray(this.getVerticesData(VertexBuffer.MatricesWeightsKind));
                if (this.isVertexBufferUpdatable(VertexBuffer.MatricesWeightsKind)) {
                    serializationObject.matricesWeights._updatable = true;
                }
            }

            serializationObject.indices = this.toNumberArray(this.getIndices());

            return serializationObject;
        }

        // Statics

        /**
         * Extracts a clone of a mesh geometry
         * @param mesh defines the source mesh
         * @param id defines the unique ID of the new geometry object
         * @returns the new geometry object
         */
        public static ExtractFromMesh(mesh: Mesh, id: string): Nullable<Geometry> {
            var geometry = mesh._geometry;

            if (!geometry) {
                return null;
            }

            return geometry.copy(id);
        }

        /**
         * You should now use Tools.RandomId(), this method is still here for legacy reasons.
         * Implementation from http://stackoverflow.com/questions/105034/how-to-create-a-guid-uuid-in-javascript/2117523#answer-2117523
         * Be aware Math.random() could cause collisions, but:
         * "All but 6 of the 128 bits of the ID are randomly generated, which means that for any two ids, there's a 1 in 2^^122 (or 5.3x10^^36) chance they'll collide"
         * @returns a string containing a new GUID
         */
        public static RandomId(): string {
            return Tools.RandomId();
        }

        /** @hidden */
        public static _ImportGeometry(parsedGeometry: any, mesh: Mesh): void {
            var scene = mesh.getScene();

            // Geometry
            var geometryId = parsedGeometry.geometryId;
            if (geometryId) {
                var geometry = scene.getGeometryByID(geometryId);
                if (geometry) {
                    geometry.applyToMesh(mesh);
                }
            } else if (parsedGeometry instanceof ArrayBuffer) {

                var binaryInfo = mesh._binaryInfo;

                if (binaryInfo.positionsAttrDesc && binaryInfo.positionsAttrDesc.count > 0) {
                    var positionsData = new Float32Array(parsedGeometry, binaryInfo.positionsAttrDesc.offset, binaryInfo.positionsAttrDesc.count);
                    mesh.setVerticesData(VertexBuffer.PositionKind, positionsData, false);
                }

                if (binaryInfo.normalsAttrDesc && binaryInfo.normalsAttrDesc.count > 0) {
                    var normalsData = new Float32Array(parsedGeometry, binaryInfo.normalsAttrDesc.offset, binaryInfo.normalsAttrDesc.count);
                    mesh.setVerticesData(VertexBuffer.NormalKind, normalsData, false);
                }

                if (binaryInfo.tangetsAttrDesc && binaryInfo.tangetsAttrDesc.count > 0) {
                    var tangentsData = new Float32Array(parsedGeometry, binaryInfo.tangetsAttrDesc.offset, binaryInfo.tangetsAttrDesc.count);
                    mesh.setVerticesData(VertexBuffer.TangentKind, tangentsData, false);
                }

                if (binaryInfo.uvsAttrDesc && binaryInfo.uvsAttrDesc.count > 0) {
                    var uvsData = new Float32Array(parsedGeometry, binaryInfo.uvsAttrDesc.offset, binaryInfo.uvsAttrDesc.count);
                    mesh.setVerticesData(VertexBuffer.UVKind, uvsData, false);
                }

                if (binaryInfo.uvs2AttrDesc && binaryInfo.uvs2AttrDesc.count > 0) {
                    var uvs2Data = new Float32Array(parsedGeometry, binaryInfo.uvs2AttrDesc.offset, binaryInfo.uvs2AttrDesc.count);
                    mesh.setVerticesData(VertexBuffer.UV2Kind, uvs2Data, false);
                }

                if (binaryInfo.uvs3AttrDesc && binaryInfo.uvs3AttrDesc.count > 0) {
                    var uvs3Data = new Float32Array(parsedGeometry, binaryInfo.uvs3AttrDesc.offset, binaryInfo.uvs3AttrDesc.count);
                    mesh.setVerticesData(VertexBuffer.UV3Kind, uvs3Data, false);
                }

                if (binaryInfo.uvs4AttrDesc && binaryInfo.uvs4AttrDesc.count > 0) {
                    var uvs4Data = new Float32Array(parsedGeometry, binaryInfo.uvs4AttrDesc.offset, binaryInfo.uvs4AttrDesc.count);
                    mesh.setVerticesData(VertexBuffer.UV4Kind, uvs4Data, false);
                }

                if (binaryInfo.uvs5AttrDesc && binaryInfo.uvs5AttrDesc.count > 0) {
                    var uvs5Data = new Float32Array(parsedGeometry, binaryInfo.uvs5AttrDesc.offset, binaryInfo.uvs5AttrDesc.count);
                    mesh.setVerticesData(VertexBuffer.UV5Kind, uvs5Data, false);
                }

                if (binaryInfo.uvs6AttrDesc && binaryInfo.uvs6AttrDesc.count > 0) {
                    var uvs6Data = new Float32Array(parsedGeometry, binaryInfo.uvs6AttrDesc.offset, binaryInfo.uvs6AttrDesc.count);
                    mesh.setVerticesData(VertexBuffer.UV6Kind, uvs6Data, false);
                }

                if (binaryInfo.colorsAttrDesc && binaryInfo.colorsAttrDesc.count > 0) {
                    var colorsData = new Float32Array(parsedGeometry, binaryInfo.colorsAttrDesc.offset, binaryInfo.colorsAttrDesc.count);
                    mesh.setVerticesData(VertexBuffer.ColorKind, colorsData, false, binaryInfo.colorsAttrDesc.stride);
                }

                if (binaryInfo.matricesIndicesAttrDesc && binaryInfo.matricesIndicesAttrDesc.count > 0) {
                    var matricesIndicesData = new Int32Array(parsedGeometry, binaryInfo.matricesIndicesAttrDesc.offset, binaryInfo.matricesIndicesAttrDesc.count);
                    var floatIndices = [];
                    for (var i = 0; i < matricesIndicesData.length; i++) {
                        var index = matricesIndicesData[i];
                        floatIndices.push(index & 0x000000FF);
                        floatIndices.push((index & 0x0000FF00) >> 8);
                        floatIndices.push((index & 0x00FF0000) >> 16);
                        floatIndices.push(index >> 24);
                    }
                    mesh.setVerticesData(VertexBuffer.MatricesIndicesKind, floatIndices, false);
                }

                if (binaryInfo.matricesWeightsAttrDesc && binaryInfo.matricesWeightsAttrDesc.count > 0) {
                    var matricesWeightsData = new Float32Array(parsedGeometry, binaryInfo.matricesWeightsAttrDesc.offset, binaryInfo.matricesWeightsAttrDesc.count);
                    mesh.setVerticesData(VertexBuffer.MatricesWeightsKind, matricesWeightsData, false);
                }

                if (binaryInfo.indicesAttrDesc && binaryInfo.indicesAttrDesc.count > 0) {
                    var indicesData = new Int32Array(parsedGeometry, binaryInfo.indicesAttrDesc.offset, binaryInfo.indicesAttrDesc.count);
                    mesh.setIndices(indicesData, null);
                }

                if (binaryInfo.subMeshesAttrDesc && binaryInfo.subMeshesAttrDesc.count > 0) {
                    var subMeshesData = new Int32Array(parsedGeometry, binaryInfo.subMeshesAttrDesc.offset, binaryInfo.subMeshesAttrDesc.count * 5);

                    mesh.subMeshes = [];
                    for (var i = 0; i < binaryInfo.subMeshesAttrDesc.count; i++) {
                        var materialIndex = subMeshesData[(i * 5) + 0];
                        var verticesStart = subMeshesData[(i * 5) + 1];
                        var verticesCount = subMeshesData[(i * 5) + 2];
                        var indexStart = subMeshesData[(i * 5) + 3];
                        var indexCount = subMeshesData[(i * 5) + 4];

                        SubMesh.AddToMesh(materialIndex, verticesStart, verticesCount, indexStart, indexCount, <AbstractMesh>mesh);
                    }
                }
            } else if (parsedGeometry.positions && parsedGeometry.normals && parsedGeometry.indices) {
                mesh.setVerticesData(VertexBuffer.PositionKind, parsedGeometry.positions, parsedGeometry.positions._updatable);

                mesh.setVerticesData(VertexBuffer.NormalKind, parsedGeometry.normals, parsedGeometry.normals._updatable);

                if (parsedGeometry.tangents) {
                    mesh.setVerticesData(VertexBuffer.TangentKind, parsedGeometry.tangents, parsedGeometry.tangents._updatable);
                }

                if (parsedGeometry.uvs) {
                    mesh.setVerticesData(VertexBuffer.UVKind, parsedGeometry.uvs, parsedGeometry.uvs._updatable);
                }

                if (parsedGeometry.uvs2) {
                    mesh.setVerticesData(VertexBuffer.UV2Kind, parsedGeometry.uvs2, parsedGeometry.uvs2._updatable);
                }

                if (parsedGeometry.uvs3) {
                    mesh.setVerticesData(VertexBuffer.UV3Kind, parsedGeometry.uvs3, parsedGeometry.uvs3._updatable);
                }

                if (parsedGeometry.uvs4) {
                    mesh.setVerticesData(VertexBuffer.UV4Kind, parsedGeometry.uvs4, parsedGeometry.uvs4._updatable);
                }

                if (parsedGeometry.uvs5) {
                    mesh.setVerticesData(VertexBuffer.UV5Kind, parsedGeometry.uvs5, parsedGeometry.uvs5._updatable);
                }

                if (parsedGeometry.uvs6) {
                    mesh.setVerticesData(VertexBuffer.UV6Kind, parsedGeometry.uvs6, parsedGeometry.uvs6._updatable);
                }

                if (parsedGeometry.colors) {
                    mesh.setVerticesData(VertexBuffer.ColorKind, Color4.CheckColors4(parsedGeometry.colors, parsedGeometry.positions.length / 3), parsedGeometry.colors._updatable);
                }

                if (parsedGeometry.matricesIndices) {
                    if (!parsedGeometry.matricesIndices._isExpanded) {
                        var floatIndices = [];

                        for (var i = 0; i < parsedGeometry.matricesIndices.length; i++) {
                            var matricesIndex = parsedGeometry.matricesIndices[i];

                            floatIndices.push(matricesIndex & 0x000000FF);
                            floatIndices.push((matricesIndex & 0x0000FF00) >> 8);
                            floatIndices.push((matricesIndex & 0x00FF0000) >> 16);
                            floatIndices.push(matricesIndex >> 24);
                        }

                        mesh.setVerticesData(VertexBuffer.MatricesIndicesKind, floatIndices, parsedGeometry.matricesIndices._updatable);
                    } else {
                        delete parsedGeometry.matricesIndices._isExpanded;
                        mesh.setVerticesData(VertexBuffer.MatricesIndicesKind, parsedGeometry.matricesIndices, parsedGeometry.matricesIndices._updatable);
                    }
                }

                if (parsedGeometry.matricesIndicesExtra) {
                    if (!parsedGeometry.matricesIndicesExtra._isExpanded) {
                        var floatIndices = [];

                        for (var i = 0; i < parsedGeometry.matricesIndicesExtra.length; i++) {
                            var matricesIndex = parsedGeometry.matricesIndicesExtra[i];

                            floatIndices.push(matricesIndex & 0x000000FF);
                            floatIndices.push((matricesIndex & 0x0000FF00) >> 8);
                            floatIndices.push((matricesIndex & 0x00FF0000) >> 16);
                            floatIndices.push(matricesIndex >> 24);
                        }

                        mesh.setVerticesData(VertexBuffer.MatricesIndicesExtraKind, floatIndices, parsedGeometry.matricesIndicesExtra._updatable);
                    } else {
                        delete parsedGeometry.matricesIndices._isExpanded;
                        mesh.setVerticesData(VertexBuffer.MatricesIndicesExtraKind, parsedGeometry.matricesIndicesExtra, parsedGeometry.matricesIndicesExtra._updatable);
                    }
                }

                if (parsedGeometry.matricesWeights) {
                    Geometry._CleanMatricesWeights(parsedGeometry, mesh);
                    mesh.setVerticesData(VertexBuffer.MatricesWeightsKind, parsedGeometry.matricesWeights, parsedGeometry.matricesWeights._updatable);
                }

                if (parsedGeometry.matricesWeightsExtra) {
                    mesh.setVerticesData(VertexBuffer.MatricesWeightsExtraKind, parsedGeometry.matricesWeightsExtra, parsedGeometry.matricesWeights._updatable);
                }

                mesh.setIndices(parsedGeometry.indices, null);
            }

            // SubMeshes
            if (parsedGeometry.subMeshes) {
                mesh.subMeshes = [];
                for (var subIndex = 0; subIndex < parsedGeometry.subMeshes.length; subIndex++) {
                    var parsedSubMesh = parsedGeometry.subMeshes[subIndex];

                    SubMesh.AddToMesh(parsedSubMesh.materialIndex, parsedSubMesh.verticesStart, parsedSubMesh.verticesCount, parsedSubMesh.indexStart, parsedSubMesh.indexCount, <AbstractMesh>mesh);
                }
            }

            // Flat shading
            if (mesh._shouldGenerateFlatShading) {
                mesh.convertToFlatShadedMesh();
                delete mesh._shouldGenerateFlatShading;
            }

            // Update
            mesh.computeWorldMatrix(true);

            scene.onMeshImportedObservable.notifyObservers(<AbstractMesh>mesh);
        }

        private static _CleanMatricesWeights(parsedGeometry: any, mesh: Mesh): void {
            const epsilon: number = 1e-3;
            if (!SceneLoader.CleanBoneMatrixWeights) {
                return;
            }
            let noInfluenceBoneIndex = 0.0;
            if (parsedGeometry.skeletonId > -1) {
                let skeleton = mesh.getScene().getLastSkeletonByID(parsedGeometry.skeletonId);

                if (!skeleton) {
                    return;
                }
                noInfluenceBoneIndex = skeleton.bones.length;
            } else {
                return;
            }
            let matricesIndices = (<FloatArray>mesh.getVerticesData(VertexBuffer.MatricesIndicesKind));
            let matricesIndicesExtra = (<FloatArray>mesh.getVerticesData(VertexBuffer.MatricesIndicesExtraKind));
            let matricesWeights = parsedGeometry.matricesWeights;
            let matricesWeightsExtra = parsedGeometry.matricesWeightsExtra;
            let influencers = parsedGeometry.numBoneInfluencer;
            let size = matricesWeights.length;

            for (var i = 0; i < size; i += 4) {
                let weight = 0.0;
                let firstZeroWeight = -1;
                for (var j = 0; j < 4; j++) {
                    let w = matricesWeights[i + j];
                    weight += w;
                    if (w < epsilon && firstZeroWeight < 0) {
                        firstZeroWeight = j;
                    }
                }
                if (matricesWeightsExtra) {
                    for (var j = 0; j < 4; j++) {
                        let w = matricesWeightsExtra[i + j];
                        weight += w;
                        if (w < epsilon && firstZeroWeight < 0) {
                            firstZeroWeight = j + 4;
                        }
                    }
                }
                if (firstZeroWeight < 0 || firstZeroWeight > (influencers - 1)) {
                    firstZeroWeight = influencers - 1;
                }
                if (weight > epsilon) {
                    let mweight = 1.0 / weight;
                    for (var j = 0; j < 4; j++) {
                        matricesWeights[i + j] *= mweight;
                    }
                    if (matricesWeightsExtra) {
                        for (var j = 0; j < 4; j++) {
                            matricesWeightsExtra[i + j] *= mweight;
                        }
                    }
                } else {
                    if (firstZeroWeight >= 4) {
                        matricesWeightsExtra[i + firstZeroWeight - 4] = 1.0 - weight;
                        matricesIndicesExtra[i + firstZeroWeight - 4] = noInfluenceBoneIndex;
                    } else {
                        matricesWeights[i + firstZeroWeight] = 1.0 - weight;
                        matricesIndices[i + firstZeroWeight] = noInfluenceBoneIndex;
                    }
                }
            }

            mesh.setVerticesData(VertexBuffer.MatricesIndicesKind, matricesIndices);
            if (parsedGeometry.matricesWeightsExtra) {
                mesh.setVerticesData(VertexBuffer.MatricesIndicesExtraKind, matricesIndicesExtra);
            }
        }

        /**
         * Create a new geometry from persisted data (Using .babylon file format)
         * @param parsedVertexData defines the persisted data
         * @param scene defines the hosting scene
         * @param rootUrl defines the root url to use to load assets (like delayed data)
         * @returns the new geometry object
         */
        public static Parse(parsedVertexData: any, scene: Scene, rootUrl: string): Nullable<Geometry> {
            if (scene.getGeometryByID(parsedVertexData.id)) {
                return null; // null since geometry could be something else than a box...
            }

            var geometry = new Geometry(parsedVertexData.id, scene, undefined, parsedVertexData.updatable);

            if (Tags) {
                Tags.AddTagsTo(geometry, parsedVertexData.tags);
            }

            if (parsedVertexData.delayLoadingFile) {
                geometry.delayLoadState = Engine.DELAYLOADSTATE_NOTLOADED;
                geometry.delayLoadingFile = rootUrl + parsedVertexData.delayLoadingFile;
                geometry._boundingInfo = new BoundingInfo(Vector3.FromArray(parsedVertexData.boundingBoxMinimum), Vector3.FromArray(parsedVertexData.boundingBoxMaximum));

                geometry._delayInfo = [];
                if (parsedVertexData.hasUVs) {
                    geometry._delayInfo.push(VertexBuffer.UVKind);
                }

                if (parsedVertexData.hasUVs2) {
                    geometry._delayInfo.push(VertexBuffer.UV2Kind);
                }

                if (parsedVertexData.hasUVs3) {
                    geometry._delayInfo.push(VertexBuffer.UV3Kind);
                }

                if (parsedVertexData.hasUVs4) {
                    geometry._delayInfo.push(VertexBuffer.UV4Kind);
                }

                if (parsedVertexData.hasUVs5) {
                    geometry._delayInfo.push(VertexBuffer.UV5Kind);
                }

                if (parsedVertexData.hasUVs6) {
                    geometry._delayInfo.push(VertexBuffer.UV6Kind);
                }

                if (parsedVertexData.hasColors) {
                    geometry._delayInfo.push(VertexBuffer.ColorKind);
                }

                if (parsedVertexData.hasMatricesIndices) {
                    geometry._delayInfo.push(VertexBuffer.MatricesIndicesKind);
                }

                if (parsedVertexData.hasMatricesWeights) {
                    geometry._delayInfo.push(VertexBuffer.MatricesWeightsKind);
                }

                geometry._delayLoadingFunction = VertexData.ImportVertexData;
            } else {
                VertexData.ImportVertexData(parsedVertexData, geometry);
            }

            scene.pushGeometry(geometry, true);

            return geometry;
        }
    }

    // Primitives

    /// Abstract class
    /**
     * Abstract class used to provide common services for all typed geometries
     * @hidden
     */
    export class _PrimitiveGeometry extends Geometry {

        private _beingRegenerated: boolean;

        /**
         * Creates a new typed geometry
         * @param id defines the unique ID of the geometry
         * @param scene defines the hosting scene
         * @param _canBeRegenerated defines if the geometry supports being regenerated with new parameters (false by default)
         * @param mesh defines the hosting mesh (can be null)
         */
        constructor(id: string, scene: Scene, private _canBeRegenerated: boolean = false, mesh: Nullable<Mesh> = null) {
            super(id, scene, undefined, false, mesh); // updatable = false to be sure not to update vertices
            this._beingRegenerated = true;
            this.regenerate();
            this._beingRegenerated = false;
        }

        /**
         * Gets a value indicating if the geometry supports being regenerated with new parameters (false by default)
         * @returns true if the geometry can be regenerated
         */
        public canBeRegenerated(): boolean {
            return this._canBeRegenerated;
        }

        /**
         * If the geometry supports regeneration, the function will recreates the geometry with updated parameter values
         */
        public regenerate(): void {
            if (!this._canBeRegenerated) {
                return;
            }
            this._beingRegenerated = true;
            this.setAllVerticesData(this._regenerateVertexData(), false);
            this._beingRegenerated = false;
        }

        /**
         * Clone the geometry
         * @param id defines the unique ID of the new geometry
         * @returns the new geometry
         */
        public asNewGeometry(id: string): Geometry {
            return super.copy(id);
        }

        // overrides
        public setAllVerticesData(vertexData: VertexData, updatable?: boolean): void {
            if (!this._beingRegenerated) {
                return;
            }
            super.setAllVerticesData(vertexData, false);
        }

        public setVerticesData(kind: string, data: FloatArray, updatable?: boolean): void {
            if (!this._beingRegenerated) {
                return;
            }
            super.setVerticesData(kind, data, false);
        }

        // to override
        /** @hidden */
        public _regenerateVertexData(): VertexData {
            throw new Error("Abstract method");
        }

        public copy(id: string): Geometry {
            throw new Error("Must be overriden in sub-classes.");
        }

        public serialize(): any {
            var serializationObject = super.serialize();

            serializationObject.canBeRegenerated = this.canBeRegenerated();

            return serializationObject;
        }
    }

    /**
     * Creates a ribbon geometry
     * @description See http://doc.babylonjs.com/how_to/ribbon_tutorial, http://doc.babylonjs.com/resources/maths_make_ribbons
     */
    export class RibbonGeometry extends _PrimitiveGeometry {

        /**
         * Creates a ribbon geometry
         * @param id defines the unique ID of the geometry
         * @param scene defines the hosting scene
         * @param pathArray defines the array of paths to use
         * @param closeArray defines if the last path and the first path must be  joined
         * @param closePath defines if the last and first points of each path in your pathArray must be joined
         * @param offset defines the offset between points
         * @param canBeRegenerated defines if the geometry supports being regenerated with new parameters (false by default)
         * @param mesh defines the hosting mesh (can be null)
         * @param side defines if the created geometry is double sided or not (default is Mesh.DEFAULTSIDE)
         */
        constructor(
            id: string, scene: Scene,
            /**
             * Defines the array of paths to use
             */
            public pathArray: Vector3[][],
            /**
             * Defines if the last and first points of each path in your pathArray must be joined
             */
            public closeArray: boolean,
            /**
             * Defines if the last and first points of each path in your pathArray must be joined
             */
            public closePath: boolean,
            /**
             * Defines the offset between points
             */
            public offset: number,
            canBeRegenerated?: boolean,
            mesh?: Mesh,
            /**
             * Defines if the created geometry is double sided or not (default is Mesh.DEFAULTSIDE)
             */
            public side: number = Mesh.DEFAULTSIDE) {
            super(id, scene, canBeRegenerated, mesh);
        }

        /** @hidden */
        public _regenerateVertexData(): VertexData {
            return VertexData.CreateRibbon({ pathArray: this.pathArray, closeArray: this.closeArray, closePath: this.closePath, offset: this.offset, sideOrientation: this.side });
        }

        public copy(id: string): Geometry {
            return new RibbonGeometry(id, this.getScene(), this.pathArray, this.closeArray, this.closePath, this.offset, this.canBeRegenerated(), undefined, this.side);
        }
    }

    /**
     * Creates a box geometry
     * @description see http://doc.babylonjs.com/how_to/set_shapes#box
     */
    export class BoxGeometry extends _PrimitiveGeometry {

        /**
         * Creates a box geometry
         * @param id defines the unique ID of the geometry
         * @param scene defines the hosting scene
         * @param size defines the zise of the box (width, height and depth are the same)
         * @param canBeRegenerated defines if the geometry supports being regenerated with new parameters (false by default)
         * @param mesh defines the hosting mesh (can be null)
         * @param side defines if the created geometry is double sided or not (default is Mesh.DEFAULTSIDE)
         */
        constructor(
            id: string, scene: Scene,
            /**
             * Defines the zise of the box (width, height and depth are the same)
             */
            public size: number,
            canBeRegenerated?: boolean,
            mesh: Nullable<Mesh> = null,
            /**
             * Defines if the created geometry is double sided or not (default is Mesh.DEFAULTSIDE)
             */
            public side: number = Mesh.DEFAULTSIDE) {
            super(id, scene, canBeRegenerated, mesh);
        }

        /** @hidden */
        public _regenerateVertexData(): VertexData {
            return VertexData.CreateBox({ size: this.size, sideOrientation: this.side });
        }

        public copy(id: string): Geometry {
            return new BoxGeometry(id, this.getScene(), this.size, this.canBeRegenerated(), undefined, this.side);
        }

        public serialize(): any {
            var serializationObject = super.serialize();

            serializationObject.size = this.size;

            return serializationObject;
        }

        public static Parse(parsedBox: any, scene: Scene): Nullable<BoxGeometry> {
            if (scene.getGeometryByID(parsedBox.id)) {
                return null; // null since geometry could be something else than a box...
            }

            var box = new BoxGeometry(parsedBox.id, scene, parsedBox.size, parsedBox.canBeRegenerated, null);
            if (Tags) {
                Tags.AddTagsTo(box, parsedBox.tags);
            }

            scene.pushGeometry(box, true);

            return box;
        }
    }

    /**
     * Creates a sphere geometry
     * @description see http://doc.babylonjs.com/how_to/set_shapes#sphere
     */
    export class SphereGeometry extends _PrimitiveGeometry {

        /**
         * Create a new sphere geometry
         * @param id defines the unique ID of the geometry
         * @param scene defines the hosting scene
         * @param segments defines the number of segments to use to create the sphere
         * @param diameter defines the diameter of the sphere
         * @param canBeRegenerated defines if the geometry supports being regenerated with new parameters (false by default)
         * @param mesh defines the hosting mesh (can be null)
         * @param side defines if the created geometry is double sided or not (default is Mesh.DEFAULTSIDE)
         */
        constructor(
            id: string, scene: Scene,
            /**
             * Defines the number of segments to use to create the sphere
             */
            public segments: number,
            /**
             * Defines the diameter of the sphere
             */
            public diameter: number,
            canBeRegenerated?: boolean,
            mesh: Nullable<Mesh> = null,
            /**
             * Defines if the created geometry is double sided or not (default is Mesh.DEFAULTSIDE)
             */
            public side: number = Mesh.DEFAULTSIDE) {
            super(id, scene, canBeRegenerated, mesh);
        }

        /** @hidden */
        public _regenerateVertexData(): VertexData {
            return VertexData.CreateSphere({ segments: this.segments, diameter: this.diameter, sideOrientation: this.side });
        }

        public copy(id: string): Geometry {
            return new SphereGeometry(id, this.getScene(), this.segments, this.diameter, this.canBeRegenerated(), null, this.side);
        }

        public serialize(): any {
            var serializationObject = super.serialize();

            serializationObject.segments = this.segments;
            serializationObject.diameter = this.diameter;

            return serializationObject;
        }

        public static Parse(parsedSphere: any, scene: Scene): Nullable<SphereGeometry> {
            if (scene.getGeometryByID(parsedSphere.id)) {
                return null; // null since geometry could be something else than a sphere...
            }

            var sphere = new SphereGeometry(parsedSphere.id, scene, parsedSphere.segments, parsedSphere.diameter, parsedSphere.canBeRegenerated, null);
            if (Tags) {
                Tags.AddTagsTo(sphere, parsedSphere.tags);
            }

            scene.pushGeometry(sphere, true);

            return sphere;
        }
    }

    /**
     * Creates a disc geometry
     * @description see http://doc.babylonjs.com/how_to/set_shapes#disc-or-regular-polygon
     */
    export class DiscGeometry extends _PrimitiveGeometry {

        /**
         * Creates a new disc geometry
         * @param id defines the unique ID of the geometry
         * @param scene defines the hosting scene
         * @param radius defines the radius of the disc
         * @param tessellation defines the tesselation factor to apply to the disc
         * @param canBeRegenerated defines if the geometry supports being regenerated with new parameters (false by default)
         * @param mesh defines the hosting mesh (can be null)
         * @param side defines if the created geometry is double sided or not (default is Mesh.DEFAULTSIDE)
         */
        constructor(
            id: string, scene: Scene,
            /**
             * Defines the radius of the disc
             */
            public radius: number,
            /**
             * Defines the tesselation factor to apply to the disc
             */
            public tessellation: number,
            canBeRegenerated?: boolean,
            mesh: Nullable<Mesh> = null,
            /**
             * Defines if the created geometry is double sided or not (default is Mesh.DEFAULTSIDE)
             */
            public side: number = Mesh.DEFAULTSIDE) {
            super(id, scene, canBeRegenerated, mesh);
        }

        /** @hidden */
        public _regenerateVertexData(): VertexData {
            return VertexData.CreateDisc({ radius: this.radius, tessellation: this.tessellation, sideOrientation: this.side });
        }

        public copy(id: string): Geometry {
            return new DiscGeometry(id, this.getScene(), this.radius, this.tessellation, this.canBeRegenerated(), null, this.side);
        }
    }

    /**
     * Creates a new cylinder geometry
     * @description see http://doc.babylonjs.com/how_to/set_shapes#cylinder-or-cone
     */
    export class CylinderGeometry extends _PrimitiveGeometry {

        /**
         * Creates a new cylinder geometry
         * @param id defines the unique ID of the geometry
         * @param scene defines the hosting scene
         * @param height defines the height of the cylinder
         * @param diameterTop defines the diameter of the cylinder's top cap
         * @param diameterBottom defines the diameter of the cylinder's bottom cap
         * @param tessellation defines the tessellation factor to apply to the cylinder (number of radial sides)
         * @param subdivisions defines the number of subdivisions to apply to the cylinder (number of rings) (1 by default)
         * @param canBeRegenerated defines if the geometry supports being regenerated with new parameters (false by default)
         * @param mesh defines the hosting mesh (can be null)
         * @param side defines if the created geometry is double sided or not (default is Mesh.DEFAULTSIDE)
         */
        constructor(
            id: string, scene: Scene,
            /**
             * Defines the height of the cylinder
             */
            public height: number,
            /**
             * Defines the diameter of the cylinder's top cap
             */
            public diameterTop: number,
            /**
             * Defines the diameter of the cylinder's bottom cap
             */
            public diameterBottom: number,
            /**
             * Defines the tessellation factor to apply to the cylinder
             */
            public tessellation: number,
            /**
             * Defines the number of subdivisions to apply to the cylinder (1 by default)
             */
            public subdivisions: number = 1,
            canBeRegenerated?: boolean, mesh:
                Nullable<Mesh> = null,
            /**
             * Defines if the created geometry is double sided or not (default is Mesh.DEFAULTSIDE)
             */
            public side: number = Mesh.DEFAULTSIDE) {
            super(id, scene, canBeRegenerated, mesh);
        }

        /** @hidden */
        public _regenerateVertexData(): VertexData {
            return VertexData.CreateCylinder({ height: this.height, diameterTop: this.diameterTop, diameterBottom: this.diameterBottom, tessellation: this.tessellation, subdivisions: this.subdivisions, sideOrientation: this.side });
        }

        public copy(id: string): Geometry {
            return new CylinderGeometry(id, this.getScene(), this.height, this.diameterTop, this.diameterBottom, this.tessellation, this.subdivisions, this.canBeRegenerated(), null, this.side);
        }

        public serialize(): any {
            var serializationObject = super.serialize();

            serializationObject.height = this.height;
            serializationObject.diameterTop = this.diameterTop;
            serializationObject.diameterBottom = this.diameterBottom;
            serializationObject.tessellation = this.tessellation;

            return serializationObject;
        }

        public static Parse(parsedCylinder: any, scene: Scene): Nullable<CylinderGeometry> {
            if (scene.getGeometryByID(parsedCylinder.id)) {
                return null; // null since geometry could be something else than a cylinder...
            }

            var cylinder = new CylinderGeometry(parsedCylinder.id, scene, parsedCylinder.height, parsedCylinder.diameterTop, parsedCylinder.diameterBottom, parsedCylinder.tessellation, parsedCylinder.subdivisions, parsedCylinder.canBeRegenerated, null);
            if (Tags) {
                Tags.AddTagsTo(cylinder, parsedCylinder.tags);
            }

            scene.pushGeometry(cylinder, true);

            return cylinder;
        }
    }

    /**
     * Creates a new torus geometry
     * @description see http://doc.babylonjs.com/how_to/set_shapes#torus
     */
    export class TorusGeometry extends _PrimitiveGeometry {

        /**
         * Creates a new torus geometry
         * @param id defines the unique ID of the geometry
         * @param scene defines the hosting scene
         * @param diameter defines the diameter of the torus
         * @param thickness defines the thickness of the torus (ie. internal diameter)
         * @param tessellation defines the tesselation factor to apply to the torus (number of segments along the circle)
         * @param canBeRegenerated defines if the geometry supports being regenerated with new parameters (false by default)
         * @param mesh defines the hosting mesh (can be null)
         * @param side defines if the created geometry is double sided or not (default is Mesh.DEFAULTSIDE)
         */
        constructor(
            id: string, scene: Scene,
            /**
             * Defines the diameter of the torus
             */
            public diameter: number,
            /**
             * Defines the thickness of the torus (ie. internal diameter)
             */
            public thickness: number,
            /**
             * Defines the tesselation factor to apply to the torus
             */
            public tessellation: number,
            canBeRegenerated?: boolean,
            mesh: Nullable<Mesh> = null,
            /**
             * Defines if the created geometry is double sided or not (default is Mesh.DEFAULTSIDE)
             */
            public side: number = Mesh.DEFAULTSIDE) {
            super(id, scene, canBeRegenerated, mesh);
        }

        /** @hidden */
        public _regenerateVertexData(): VertexData {
            return VertexData.CreateTorus({ diameter: this.diameter, thickness: this.thickness, tessellation: this.tessellation, sideOrientation: this.side });
        }

        public copy(id: string): Geometry {
            return new TorusGeometry(id, this.getScene(), this.diameter, this.thickness, this.tessellation, this.canBeRegenerated(), null, this.side);
        }

        public serialize(): any {
            var serializationObject = super.serialize();

            serializationObject.diameter = this.diameter;
            serializationObject.thickness = this.thickness;
            serializationObject.tessellation = this.tessellation;

            return serializationObject;
        }

        public static Parse(parsedTorus: any, scene: Scene): Nullable<TorusGeometry> {
            if (scene.getGeometryByID(parsedTorus.id)) {
                return null; // null since geometry could be something else than a torus...
            }

            var torus = new TorusGeometry(parsedTorus.id, scene, parsedTorus.diameter, parsedTorus.thickness, parsedTorus.tessellation, parsedTorus.canBeRegenerated, null);
            if (Tags) {
                Tags.AddTagsTo(torus, parsedTorus.tags);
            }

            scene.pushGeometry(torus, true);

            return torus;
        }
    }

    /**
     * Creates a new ground geometry
     * @description see http://doc.babylonjs.com/how_to/set_shapes#ground
     */
    export class GroundGeometry extends _PrimitiveGeometry {

        /**
         * Creates a new ground geometry
         * @param id defines the unique ID of the geometry
         * @param scene defines the hosting scene
         * @param width defines the width of the ground
         * @param height defines the height of the ground
         * @param subdivisions defines the subdivisions to apply to the ground
         * @param canBeRegenerated defines if the geometry supports being regenerated with new parameters (false by default)
         * @param mesh defines the hosting mesh (can be null)
         */
        constructor(
            id: string, scene: Scene,
            /**
             * Defines the width of the ground
             */
            public width: number,
            /**
             * Defines the height of the ground
             */
            public height: number,
            /**
             * Defines the subdivisions to apply to the ground
             */
            public subdivisions: number,
            canBeRegenerated?: boolean,
            mesh: Nullable<Mesh> = null) {
            super(id, scene, canBeRegenerated, mesh);
        }

        /** @hidden */
        public _regenerateVertexData(): VertexData {
            return VertexData.CreateGround({ width: this.width, height: this.height, subdivisions: this.subdivisions });
        }

        public copy(id: string): Geometry {
            return new GroundGeometry(id, this.getScene(), this.width, this.height, this.subdivisions, this.canBeRegenerated(), null);
        }

        public serialize(): any {
            var serializationObject = super.serialize();

            serializationObject.width = this.width;
            serializationObject.height = this.height;
            serializationObject.subdivisions = this.subdivisions;

            return serializationObject;
        }

        public static Parse(parsedGround: any, scene: Scene): Nullable<GroundGeometry> {
            if (scene.getGeometryByID(parsedGround.id)) {
                return null; // null since geometry could be something else than a ground...
            }

            var ground = new GroundGeometry(parsedGround.id, scene, parsedGround.width, parsedGround.height, parsedGround.subdivisions, parsedGround.canBeRegenerated, null);
            if (Tags) {
                Tags.AddTagsTo(ground, parsedGround.tags);
            }

            scene.pushGeometry(ground, true);

            return ground;
        }
    }

    /**
     * Creates a tiled ground geometry
     * @description see http://doc.babylonjs.com/how_to/set_shapes#tiled-ground
     */
    export class TiledGroundGeometry extends _PrimitiveGeometry {

        /**
         * Creates a tiled ground geometry
         * @param id defines the unique ID of the geometry
         * @param scene defines the hosting scene
         * @param xmin defines the minimum value on X axis
         * @param zmin defines the minimum value on Z axis
         * @param xmax defines the maximum value on X axis
         * @param zmax defines the maximum value on Z axis
         * @param subdivisions defines the subdivisions to apply to the ground (number of subdivisions (tiles) on the height and the width of the map)
         * @param precision defines the precision to use when computing the tiles
         * @param canBeRegenerated defines if the geometry supports being regenerated with new parameters (false by default)
         * @param mesh defines the hosting mesh (can be null)
         */
        constructor(
            id: string, scene: Scene,
            /**
             * Defines the minimum value on X axis
             */
            public xmin: number,
            /**
             * Defines the minimum value on Z axis
             */
            public zmin: number,
            /**
             * Defines the maximum value on X axis
             */
            public xmax: number,
            /**
             * Defines the maximum value on Z axis
             */
            public zmax: number,
            /**
             * Defines the subdivisions to apply to the ground
             */
            public subdivisions: { w: number; h: number; },
            /**
             * Defines the precision to use when computing the tiles
             */
            public precision: { w: number; h: number; },
            canBeRegenerated?: boolean,
            mesh: Nullable<Mesh> = null) {
            super(id, scene, canBeRegenerated, mesh);
        }

        /** @hidden */
        public _regenerateVertexData(): VertexData {
            return VertexData.CreateTiledGround({ xmin: this.xmin, zmin: this.zmin, xmax: this.xmax, zmax: this.zmax, subdivisions: this.subdivisions, precision: this.precision });
        }

        public copy(id: string): Geometry {
            return new TiledGroundGeometry(id, this.getScene(), this.xmin, this.zmin, this.xmax, this.zmax, this.subdivisions, this.precision, this.canBeRegenerated(), null);
        }
    }

    /**
     * Creates a plane geometry
     * @description see http://doc.babylonjs.com/how_to/set_shapes#plane
     */
    export class PlaneGeometry extends _PrimitiveGeometry {

        /**
         * Creates a plane geometry
         * @param id defines the unique ID of the geometry
         * @param scene defines the hosting scene
         * @param size defines the size of the plane (width === height)
         * @param canBeRegenerated defines if the geometry supports being regenerated with new parameters (false by default)
         * @param mesh defines the hosting mesh (can be null)
         * @param side defines if the created geometry is double sided or not (default is Mesh.DEFAULTSIDE)
         */
        constructor(
            id: string, scene: Scene,
            /**
             * Defines the size of the plane (width === height)
             */
            public size: number,
            canBeRegenerated?: boolean,
            mesh: Nullable<Mesh> = null,
            /**
             * Defines if the created geometry is double sided or not (default is Mesh.DEFAULTSIDE)
             */
            public side: number = Mesh.DEFAULTSIDE) {
            super(id, scene, canBeRegenerated, mesh);
        }

        /** @hidden */
        public _regenerateVertexData(): VertexData {
            return VertexData.CreatePlane({ size: this.size, sideOrientation: this.side });
        }

        public copy(id: string): Geometry {
            return new PlaneGeometry(id, this.getScene(), this.size, this.canBeRegenerated(), null, this.side);
        }

        public serialize(): any {
            var serializationObject = super.serialize();

            serializationObject.size = this.size;

            return serializationObject;
        }

        public static Parse(parsedPlane: any, scene: Scene): Nullable<PlaneGeometry> {
            if (scene.getGeometryByID(parsedPlane.id)) {
                return null; // null since geometry could be something else than a ground...
            }

            var plane = new PlaneGeometry(parsedPlane.id, scene, parsedPlane.size, parsedPlane.canBeRegenerated, null);
            if (Tags) {
                Tags.AddTagsTo(plane, parsedPlane.tags);
            }

            scene.pushGeometry(plane, true);

            return plane;
        }
    }

    /**
     * Creates a torus knot geometry
     * @description see http://doc.babylonjs.com/how_to/set_shapes#torus-knot
     */
    export class TorusKnotGeometry extends _PrimitiveGeometry {

        /**
         * Creates a torus knot geometry
         * @param id defines the unique ID of the geometry
         * @param scene defines the hosting scene
         * @param radius defines the radius of the torus knot
         * @param tube defines the thickness of the torus knot tube
         * @param radialSegments defines the number of radial segments
         * @param tubularSegments defines the number of tubular segments
         * @param p defines the first number of windings
         * @param q defines the second number of windings
         * @param canBeRegenerated defines if the geometry supports being regenerated with new parameters (false by default)
         * @param mesh defines the hosting mesh (can be null)
         * @param side defines if the created geometry is double sided or not (default is Mesh.DEFAULTSIDE)
         */
        constructor(
            id: string, scene: Scene,
            /**
             * Defines the radius of the torus knot
             */
            public radius: number,
            /**
             * Defines the thickness of the torus knot tube
             */
            public tube: number,
            /**
             * Defines the number of radial segments
             */
            public radialSegments: number,
            /**
             * Defines the number of tubular segments
             */
            public tubularSegments: number,
            /**
             * Defines the first number of windings
             */
            public p: number,
            /**
             * Defines the second number of windings
             */
            public q: number,
            canBeRegenerated?: boolean,
            mesh: Nullable<Mesh> = null,
            /**
             * Defines if the created geometry is double sided or not (default is Mesh.DEFAULTSIDE)
             */
            public side: number = Mesh.DEFAULTSIDE) {
            super(id, scene, canBeRegenerated, mesh);
        }

        /** @hidden */
        public _regenerateVertexData(): VertexData {
            return VertexData.CreateTorusKnot({ radius: this.radius, tube: this.tube, radialSegments: this.radialSegments, tubularSegments: this.tubularSegments, p: this.p, q: this.q, sideOrientation: this.side });
        }

        public copy(id: string): Geometry {
            return new TorusKnotGeometry(id, this.getScene(), this.radius, this.tube, this.radialSegments, this.tubularSegments, this.p, this.q, this.canBeRegenerated(), null, this.side);
        }

        public serialize(): any {
            var serializationObject = super.serialize();

            serializationObject.radius = this.radius;
            serializationObject.tube = this.tube;
            serializationObject.radialSegments = this.radialSegments;
            serializationObject.tubularSegments = this.tubularSegments;
            serializationObject.p = this.p;
            serializationObject.q = this.q;

            return serializationObject;
        }

        public static Parse(parsedTorusKnot: any, scene: Scene): Nullable<TorusKnotGeometry> {
            if (scene.getGeometryByID(parsedTorusKnot.id)) {
                return null; // null since geometry could be something else than a ground...
            }

            var torusKnot = new TorusKnotGeometry(parsedTorusKnot.id, scene, parsedTorusKnot.radius, parsedTorusKnot.tube, parsedTorusKnot.radialSegments, parsedTorusKnot.tubularSegments, parsedTorusKnot.p, parsedTorusKnot.q, parsedTorusKnot.canBeRegenerated, null);
            if (Tags) {
                Tags.AddTagsTo(torusKnot, parsedTorusKnot.tags);
            }

            scene.pushGeometry(torusKnot, true);

            return torusKnot;
        }
    }
    //}