Babylon.js/src/Particles/babylon.solidParticleSystem.js

var BABYLON;
(function (BABYLON) {
    /**
    * Full documentation here : http://doc.babylonjs.com/tutorials/Solid_Particle_System
    */
    var SolidParticleSystem = (function () {
        /**
        * Creates a SPS (Solid Particle System) object.
        * @param name the SPS name, this will be the underlying mesh name
        * @param scene the scene in which the SPS is added
        * @param options "updatable" (default true) : if the SPS must be updatable or immutable, "isPickable" (default false) : if the solid particles must be pickable
        */
        function SolidParticleSystem(name, scene, options) {
            // public members
            /**
            *  The SPS array of Solid Particle objects. Just access each particle as with any classic array.
            *  Example : var p = SPS.particles[i];
            */
            this.particles = new Array();
            /**
            * The SPS total number of particles. Read only. Use SPS.counter instead if you need to set your own value.
            */
            this.nbParticles = 0;
            /**
            * If the particles must ever face the camera (default false). Useful for planar particles.
            */
            this.billboard = false;
            /**
            * This a counter ofr your own usage. It's not set by any SPS functions.
            */
            this.counter = 0;
            /**
            * This empty object is intended to store some SPS specific or temporary values in order to lower the Garbage Collector activity.
            * Please read : http://doc.babylonjs.com/tutorials/Solid_Particle_System#garbage-collector-concerns
            */
            this.vars = {};
            this._positions = new Array();
            this._indices = new Array();
            this._normals = new Array();
            this._colors = new Array();
            this._uvs = new Array();
            this._index = 0; // indices index
            this._updatable = true;
            this._pickable = false;
            this._isVisibilityBoxLocked = false;
            this._alwaysVisible = false;
            this._shapeCounter = 0;
            this._copy = new BABYLON.SolidParticle(null, null, null, null, null);
            this._color = new BABYLON.Color4(0, 0, 0, 0);
            this._computeParticleColor = true;
            this._computeParticleTexture = true;
            this._computeParticleRotation = true;
            this._computeParticleVertex = false;
            this._computeBoundingBox = false;
            this._cam_axisZ = BABYLON.Vector3.Zero();
            this._cam_axisY = BABYLON.Vector3.Zero();
            this._cam_axisX = BABYLON.Vector3.Zero();
            this._axisX = BABYLON.Axis.X;
            this._axisY = BABYLON.Axis.Y;
            this._axisZ = BABYLON.Axis.Z;
            this._fakeCamPos = BABYLON.Vector3.Zero();
            this._rotMatrix = new BABYLON.Matrix();
            this._invertMatrix = new BABYLON.Matrix();
            this._rotated = BABYLON.Vector3.Zero();
            this._quaternion = new BABYLON.Quaternion();
            this._vertex = BABYLON.Vector3.Zero();
            this._normal = BABYLON.Vector3.Zero();
            this._yaw = 0.0;
            this._pitch = 0.0;
            this._roll = 0.0;
            this._halfroll = 0.0;
            this._halfpitch = 0.0;
            this._halfyaw = 0.0;
            this._sinRoll = 0.0;
            this._cosRoll = 0.0;
            this._sinPitch = 0.0;
            this._cosPitch = 0.0;
            this._sinYaw = 0.0;
            this._cosYaw = 0.0;
            this._w = 0.0;
            this._minimum = BABYLON.Tmp.Vector3[0];
            this._maximum = BABYLON.Tmp.Vector3[1];
            this.name = name;
            this._scene = scene;
            this._camera = scene.activeCamera;
            this._pickable = options ? options.isPickable : false;
            if (options && options.updatable) {
                this._updatable = options.updatable;
            }
            else {
                this._updatable = true;
            }
            if (this._pickable) {
                this.pickedParticles = [];
            }
        }
        /**
        * Builds the SPS underlying mesh. Returns a standard Mesh.
        * If no model shape was added to the SPS, the return mesh is only a single triangular plane.
        */
        SolidParticleSystem.prototype.buildMesh = function () {
            if (this.nbParticles === 0) {
                var triangle = BABYLON.MeshBuilder.CreateDisc("", { radius: 1, tessellation: 3 }, this._scene);
                this.addShape(triangle, 1);
                triangle.dispose();
            }
            this._positions32 = new Float32Array(this._positions);
            this._uvs32 = new Float32Array(this._uvs);
            this._colors32 = new Float32Array(this._colors);
            BABYLON.VertexData.ComputeNormals(this._positions32, this._indices, this._normals);
            this._normals32 = new Float32Array(this._normals);
            this._fixedNormal32 = new Float32Array(this._normals);
            var vertexData = new BABYLON.VertexData();
            vertexData.set(this._positions32, BABYLON.VertexBuffer.PositionKind);
            vertexData.indices = this._indices;
            vertexData.set(this._normals32, BABYLON.VertexBuffer.NormalKind);
            if (this._uvs32) {
                vertexData.set(this._uvs32, BABYLON.VertexBuffer.UVKind);
                ;
            }
            if (this._colors32) {
                vertexData.set(this._colors32, BABYLON.VertexBuffer.ColorKind);
            }
            var mesh = new BABYLON.Mesh(this.name, this._scene);
            vertexData.applyToMesh(mesh, this._updatable);
            this.mesh = mesh;
            this.mesh.isPickable = this._pickable;
            // free memory
            this._positions = null;
            this._normals = null;
            this._uvs = null;
            this._colors = null;
            if (!this._updatable) {
                this.particles.length = 0;
            }
            return mesh;
        };
        /**
        * Digests the mesh and generates as many solid particles in the system as wanted.
        * These particles will have the same geometry than the mesh parts and will be positioned at the same localisation than the mesh original places.
        * Thus the particles generated from digest() have their property "positiion" yet set.
        * @param mesh the mesh to be digested
        * @param facetNb the number of mesh facets per particle (optional, default 1), this parameter is overriden by the parameter "number" if any
        * @param delta the random extra number of facets per partical (optional, default 0), each particle will have between facetNb and facetNb + delta facets
        * @param number the wanted number of particles : each particle is built with mesh_total_facets / number facets (optional)
        */
        SolidParticleSystem.prototype.digest = function (mesh, options) {
            var size = (options && options.facetNb) || 1;
            var number = (options && options.number);
            var delta = (options && options.delta) || 0;
            var meshPos = mesh.getVerticesData(BABYLON.VertexBuffer.PositionKind);
            var meshInd = mesh.getIndices();
            var meshUV = mesh.getVerticesData(BABYLON.VertexBuffer.UVKind);
            var meshCol = mesh.getVerticesData(BABYLON.VertexBuffer.ColorKind);
            var f = 0; // facet counter
            var totalFacets = meshInd.length / 3; // a facet is a triangle, so 3 indices
            // compute size from number
            if (number) {
                number = (number > totalFacets) ? totalFacets : number;
                size = Math.round(totalFacets / number);
                delta = 0;
            }
            else {
                size = (size > totalFacets) ? totalFacets : size;
            }
            var facetPos = []; // submesh positions
            var facetInd = []; // submesh indices
            var facetUV = []; // submesh UV
            var facetCol = []; // submesh colors
            var barycenter = BABYLON.Tmp.Vector3[0];
            var rand;
            var sizeO = size;
            while (f < totalFacets) {
                size = sizeO + Math.floor((1 + delta) * Math.random());
                if (f > totalFacets - size) {
                    size = totalFacets - f;
                }
                // reset temp arrays
                facetPos.length = 0;
                facetInd.length = 0;
                facetUV.length = 0;
                facetCol.length = 0;
                // iterate over "size" facets
                var fi = 0;
                for (var j = f * 3; j < (f + size) * 3; j++) {
                    facetInd.push(fi);
                    var i = meshInd[j];
                    facetPos.push(meshPos[i * 3], meshPos[i * 3 + 1], meshPos[i * 3 + 2]);
                    if (meshUV) {
                        facetUV.push(meshUV[i * 2], meshUV[i * 2 + 1]);
                    }
                    if (meshCol) {
                        facetCol.push(meshCol[i * 4], meshCol[i * 4 + 1], meshCol[i * 4 + 2], meshCol[i * 4 + 3]);
                    }
                    fi++;
                }
                // create a model shape for each single particle
                var idx = this.nbParticles;
                var shape = this._posToShape(facetPos);
                var shapeUV = this._uvsToShapeUV(facetUV);
                // compute the barycenter of the shape
                var v;
                for (v = 0; v < shape.length; v++) {
                    barycenter.addInPlace(shape[v]);
                }
                barycenter.scaleInPlace(1 / shape.length);
                // shift the shape from its barycenter to the origin
                for (v = 0; v < shape.length; v++) {
                    shape[v].subtractInPlace(barycenter);
                }
                var modelShape = new BABYLON.ModelShape(this._shapeCounter, shape, shapeUV, null, null);
                // add the particle in the SPS
                this._meshBuilder(this._index, shape, this._positions, facetInd, this._indices, facetUV, this._uvs, facetCol, this._colors, idx, 0, null);
                this._addParticle(idx, this._positions.length, modelShape, this._shapeCounter, 0);
                // initialize the particle position
                this.particles[this.nbParticles].position.addInPlace(barycenter);
                this._index += shape.length;
                idx++;
                this.nbParticles++;
                this._shapeCounter++;
                f += size;
            }
        };
        //reset copy
        SolidParticleSystem.prototype._resetCopy = function () {
            this._copy.position.x = 0;
            this._copy.position.y = 0;
            this._copy.position.z = 0;
            this._copy.rotation.x = 0;
            this._copy.rotation.y = 0;
            this._copy.rotation.z = 0;
            this._copy.quaternion = null;
            this._copy.scale.x = 1;
            this._copy.scale.y = 1;
            this._copy.scale.z = 1;
            this._copy.uvs.x = 0;
            this._copy.uvs.y = 0;
            this._copy.uvs.z = 1;
            this._copy.uvs.w = 1;
            this._copy.color = null;
        };
        // _meshBuilder : inserts the shape model in the global SPS mesh
        SolidParticleSystem.prototype._meshBuilder = function (p, shape, positions, meshInd, indices, meshUV, uvs, meshCol, colors, idx, idxInShape, options) {
            var i;
            var u = 0;
            var c = 0;
            this._resetCopy();
            if (options && options.positionFunction) {
                options.positionFunction(this._copy, idx, idxInShape);
            }
            if (this._copy.quaternion) {
                this._quaternion.x = this._copy.quaternion.x;
                this._quaternion.y = this._copy.quaternion.y;
                this._quaternion.z = this._copy.quaternion.z;
                this._quaternion.w = this._copy.quaternion.w;
            }
            else {
                this._yaw = this._copy.rotation.y;
                this._pitch = this._copy.rotation.x;
                this._roll = this._copy.rotation.z;
                this._quaternionRotationYPR();
            }
            this._quaternionToRotationMatrix();
            for (i = 0; i < shape.length; i++) {
                this._vertex.x = shape[i].x;
                this._vertex.y = shape[i].y;
                this._vertex.z = shape[i].z;
                if (options && options.vertexFunction) {
                    options.vertexFunction(this._copy, this._vertex, i);
                }
                this._vertex.x *= this._copy.scale.x;
                this._vertex.y *= this._copy.scale.y;
                this._vertex.z *= this._copy.scale.z;
                BABYLON.Vector3.TransformCoordinatesToRef(this._vertex, this._rotMatrix, this._rotated);
                positions.push(this._copy.position.x + this._rotated.x, this._copy.position.y + this._rotated.y, this._copy.position.z + this._rotated.z);
                if (meshUV) {
                    uvs.push((this._copy.uvs.z - this._copy.uvs.x) * meshUV[u] + this._copy.uvs.x, (this._copy.uvs.w - this._copy.uvs.y) * meshUV[u + 1] + this._copy.uvs.y);
                    u += 2;
                }
                if (this._copy.color) {
                    this._color = this._copy.color;
                }
                else if (meshCol && meshCol[c]) {
                    this._color.r = meshCol[c];
                    this._color.g = meshCol[c + 1];
                    this._color.b = meshCol[c + 2];
                    this._color.a = meshCol[c + 3];
                }
                else {
                    this._color.r = 1;
                    this._color.g = 1;
                    this._color.b = 1;
                    this._color.a = 1;
                }
                colors.push(this._color.r, this._color.g, this._color.b, this._color.a);
                c += 4;
            }
            for (i = 0; i < meshInd.length; i++) {
                indices.push(p + meshInd[i]);
            }
            if (this._pickable) {
                var nbfaces = meshInd.length / 3;
                for (i = 0; i < nbfaces; i++) {
                    this.pickedParticles.push({ idx: idx, faceId: i });
                }
            }
        };
        // returns a shape array from positions array
        SolidParticleSystem.prototype._posToShape = function (positions) {
            var shape = [];
            for (var i = 0; i < positions.length; i += 3) {
                shape.push(new BABYLON.Vector3(positions[i], positions[i + 1], positions[i + 2]));
            }
            return shape;
        };
        // returns a shapeUV array from a Vector4 uvs
        SolidParticleSystem.prototype._uvsToShapeUV = function (uvs) {
            var shapeUV = [];
            if (uvs) {
                for (var i = 0; i < uvs.length; i++)
                    shapeUV.push(uvs[i]);
            }
            return shapeUV;
        };
        // adds a new particle object in the particles array
        SolidParticleSystem.prototype._addParticle = function (idx, idxpos, model, shapeId, idxInShape) {
            this.particles.push(new BABYLON.SolidParticle(idx, idxpos, model, shapeId, idxInShape));
        };
        /**
        * Adds some particles to the SPS from the model shape.
        * Please read the doc : http://doc.babylonjs.com/tutorials/Solid_Particle_System#create-an-immutable-sps
        * @param mesh any Mesh object that will be used as a model for the solid particles.
        * @param nb the number of particles to be created from this model
        * @param options positionFunction is an optional javascript function to called for each particle on SPS creation. vertexFunction an optional javascript function to called for each vertex of each particle on SPS creation
        */
        SolidParticleSystem.prototype.addShape = function (mesh, nb, options) {
            var meshPos = mesh.getVerticesData(BABYLON.VertexBuffer.PositionKind);
            var meshInd = mesh.getIndices();
            var meshUV = mesh.getVerticesData(BABYLON.VertexBuffer.UVKind);
            var meshCol = mesh.getVerticesData(BABYLON.VertexBuffer.ColorKind);
            var shape = this._posToShape(meshPos);
            var shapeUV = this._uvsToShapeUV(meshUV);
            var posfunc = options ? options.positionFunction : null;
            var vtxfunc = options ? options.vertexFunction : null;
            var modelShape = new BABYLON.ModelShape(this._shapeCounter, shape, shapeUV, posfunc, vtxfunc);
            // particles
            var idx = this.nbParticles;
            for (var i = 0; i < nb; i++) {
                this._meshBuilder(this._index, shape, this._positions, meshInd, this._indices, meshUV, this._uvs, meshCol, this._colors, idx, i, options);
                if (this._updatable) {
                    this._addParticle(idx, this._positions.length, modelShape, this._shapeCounter, i);
                }
                this._index += shape.length;
                idx++;
            }
            this.nbParticles += nb;
            this._shapeCounter++;
            return this._shapeCounter - 1;
        };
        // rebuilds a particle back to its just built status : if needed, recomputes the custom positions and vertices
        SolidParticleSystem.prototype._rebuildParticle = function (particle) {
            this._resetCopy();
            if (particle._model._positionFunction) {
                particle._model._positionFunction(this._copy, particle.idx, particle.idxInShape);
            }
            if (this._copy.quaternion) {
                this._quaternion.x = this._copy.quaternion.x;
                this._quaternion.y = this._copy.quaternion.y;
                this._quaternion.z = this._copy.quaternion.z;
                this._quaternion.w = this._copy.quaternion.w;
            }
            else {
                this._yaw = this._copy.rotation.y;
                this._pitch = this._copy.rotation.x;
                this._roll = this._copy.rotation.z;
                this._quaternionRotationYPR();
            }
            this._quaternionToRotationMatrix();
            this._shape = particle._model._shape;
            for (var pt = 0; pt < this._shape.length; pt++) {
                this._vertex.x = this._shape[pt].x;
                this._vertex.y = this._shape[pt].y;
                this._vertex.z = this._shape[pt].z;
                if (particle._model._vertexFunction) {
                    particle._model._vertexFunction(this._copy, this._vertex, pt); // recall to stored vertexFunction
                }
                this._vertex.x *= this._copy.scale.x;
                this._vertex.y *= this._copy.scale.y;
                this._vertex.z *= this._copy.scale.z;
                BABYLON.Vector3.TransformCoordinatesToRef(this._vertex, this._rotMatrix, this._rotated);
                this._positions32[particle._pos + pt * 3] = this._copy.position.x + this._rotated.x;
                this._positions32[particle._pos + pt * 3 + 1] = this._copy.position.y + this._rotated.y;
                this._positions32[particle._pos + pt * 3 + 2] = this._copy.position.z + this._rotated.z;
            }
            particle.position.x = 0;
            particle.position.y = 0;
            particle.position.z = 0;
            particle.rotation.x = 0;
            particle.rotation.y = 0;
            particle.rotation.z = 0;
            particle.quaternion = null;
            particle.scale.x = 1;
            particle.scale.y = 1;
            particle.scale.z = 1;
        };
        /**
        * Rebuilds the whole mesh and updates the VBO : custom positions and vertices are recomputed if needed.
        */
        SolidParticleSystem.prototype.rebuildMesh = function () {
            for (var p = 0; p < this.particles.length; p++) {
                this._rebuildParticle(this.particles[p]);
            }
            this.mesh.updateVerticesData(BABYLON.VertexBuffer.PositionKind, this._positions32, false, false);
        };
        /**
        *  Sets all the particles : this method actually really updates the mesh according to the particle positions, rotations, colors, textures, etc.
        *  This method calls updateParticle() for each particles of the SPS.
        *  For an animated SPS, it is usually called within the render loop.
        * @param start (default 0) the particle index in the particle array where to start to compute the particle property values
        * @param end (default nbParticle - 1)  the particle index in the particle array where to stop to compute the particle property values
        * @param update (default true) if the mesh must be finally updated on this call after all the particle computations.
        */
        SolidParticleSystem.prototype.setParticles = function (start, end, update) {
            if (start === void 0) { start = 0; }
            if (end === void 0) { end = this.nbParticles - 1; }
            if (update === void 0) { update = true; }
            if (!this._updatable) {
                return;
            }
            // custom beforeUpdate
            this.beforeUpdateParticles(start, end, update);
            this._cam_axisX.x = 1;
            this._cam_axisX.y = 0;
            this._cam_axisX.z = 0;
            this._cam_axisY.x = 0;
            this._cam_axisY.y = 1;
            this._cam_axisY.z = 0;
            this._cam_axisZ.x = 0;
            this._cam_axisZ.y = 0;
            this._cam_axisZ.z = 1;
            // if the particles will always face the camera
            if (this.billboard) {
                // compute a fake camera position : un-rotate the camera position by the current mesh rotation
                this._yaw = this.mesh.rotation.y;
                this._pitch = this.mesh.rotation.x;
                this._roll = this.mesh.rotation.z;
                this._quaternionRotationYPR();
                this._quaternionToRotationMatrix();
                this._rotMatrix.invertToRef(this._invertMatrix);
                BABYLON.Vector3.TransformCoordinatesToRef(this._camera.globalPosition, this._invertMatrix, this._fakeCamPos);
                // set two orthogonal vectors (_cam_axisX and and _cam_axisY) to the cam-mesh axis (_cam_axisZ)
                (this._fakeCamPos).subtractToRef(this.mesh.position, this._cam_axisZ);
                BABYLON.Vector3.CrossToRef(this._cam_axisZ, this._axisX, this._cam_axisY);
                BABYLON.Vector3.CrossToRef(this._cam_axisZ, this._cam_axisY, this._cam_axisX);
                this._cam_axisY.normalize();
                this._cam_axisX.normalize();
                this._cam_axisZ.normalize();
            }
            BABYLON.Matrix.IdentityToRef(this._rotMatrix);
            var idx = 0;
            var index = 0;
            var colidx = 0;
            var colorIndex = 0;
            var uvidx = 0;
            var uvIndex = 0;
            if (this._computeBoundingBox) {
                BABYLON.Vector3.FromFloatsToRef(Number.MAX_VALUE, Number.MAX_VALUE, Number.MAX_VALUE, this._minimum);
                BABYLON.Vector3.FromFloatsToRef(-Number.MAX_VALUE, -Number.MAX_VALUE, -Number.MAX_VALUE, this._maximum);
            }
            // particle loop
            end = (end > this.nbParticles - 1) ? this.nbParticles - 1 : end;
            for (var p = start; p <= end; p++) {
                this._particle = this.particles[p];
                this._shape = this._particle._model._shape;
                this._shapeUV = this._particle._model._shapeUV;
                // call to custom user function to update the particle properties
                this.updateParticle(this._particle);
                // particle rotation matrix
                if (this.billboard) {
                    this._particle.rotation.x = 0.0;
                    this._particle.rotation.y = 0.0;
                }
                if (this._computeParticleRotation) {
                    if (this._particle.quaternion) {
                        this._quaternion.x = this._particle.quaternion.x;
                        this._quaternion.y = this._particle.quaternion.y;
                        this._quaternion.z = this._particle.quaternion.z;
                        this._quaternion.w = this._particle.quaternion.w;
                    }
                    else {
                        this._yaw = this._particle.rotation.y;
                        this._pitch = this._particle.rotation.x;
                        this._roll = this._particle.rotation.z;
                        this._quaternionRotationYPR();
                    }
                    this._quaternionToRotationMatrix();
                }
                for (var pt = 0; pt < this._shape.length; pt++) {
                    idx = index + pt * 3;
                    colidx = colorIndex + pt * 4;
                    uvidx = uvIndex + pt * 2;
                    this._vertex.x = this._shape[pt].x;
                    this._vertex.y = this._shape[pt].y;
                    this._vertex.z = this._shape[pt].z;
                    if (this._computeParticleVertex) {
                        this.updateParticleVertex(this._particle, this._vertex, pt);
                    }
                    // positions
                    this._vertex.x *= this._particle.scale.x;
                    this._vertex.y *= this._particle.scale.y;
                    this._vertex.z *= this._particle.scale.z;
                    this._w = (this._vertex.x * this._rotMatrix.m[3]) + (this._vertex.y * this._rotMatrix.m[7]) + (this._vertex.z * this._rotMatrix.m[11]) + this._rotMatrix.m[15];
                    this._rotated.x = ((this._vertex.x * this._rotMatrix.m[0]) + (this._vertex.y * this._rotMatrix.m[4]) + (this._vertex.z * this._rotMatrix.m[8]) + this._rotMatrix.m[12]) / this._w;
                    this._rotated.y = ((this._vertex.x * this._rotMatrix.m[1]) + (this._vertex.y * this._rotMatrix.m[5]) + (this._vertex.z * this._rotMatrix.m[9]) + this._rotMatrix.m[13]) / this._w;
                    this._rotated.z = ((this._vertex.x * this._rotMatrix.m[2]) + (this._vertex.y * this._rotMatrix.m[6]) + (this._vertex.z * this._rotMatrix.m[10]) + this._rotMatrix.m[14]) / this._w;
                    this._positions32[idx] = this._particle.position.x + this._cam_axisX.x * this._rotated.x + this._cam_axisY.x * this._rotated.y + this._cam_axisZ.x * this._rotated.z;
                    this._positions32[idx + 1] = this._particle.position.y + this._cam_axisX.y * this._rotated.x + this._cam_axisY.y * this._rotated.y + this._cam_axisZ.y * this._rotated.z;
                    this._positions32[idx + 2] = this._particle.position.z + this._cam_axisX.z * this._rotated.x + this._cam_axisY.z * this._rotated.y + this._cam_axisZ.z * this._rotated.z;
                    if (this._computeBoundingBox) {
                        if (this._positions32[idx] < this._minimum.x) {
                            this._minimum.x = this._positions32[idx];
                        }
                        if (this._positions32[idx] > this._maximum.x) {
                            this._maximum.x = this._positions32[idx];
                        }
                        if (this._positions32[idx + 1] < this._minimum.y) {
                            this._minimum.y = this._positions32[idx + 1];
                        }
                        if (this._positions32[idx + 1] > this._maximum.y) {
                            this._maximum.y = this._positions32[idx + 1];
                        }
                        if (this._positions32[idx + 2] < this._minimum.z) {
                            this._minimum.z = this._positions32[idx + 2];
                        }
                        if (this._positions32[idx + 2] > this._maximum.z) {
                            this._maximum.z = this._positions32[idx + 2];
                        }
                    }
                    // normals : if the particles can't be morphed then just rotate the normals
                    if (!this._computeParticleVertex && !this.billboard) {
                        this._normal.x = this._fixedNormal32[idx];
                        this._normal.y = this._fixedNormal32[idx + 1];
                        this._normal.z = this._fixedNormal32[idx + 2];
                        this._w = (this._normal.x * this._rotMatrix.m[3]) + (this._normal.y * this._rotMatrix.m[7]) + (this._normal.z * this._rotMatrix.m[11]) + this._rotMatrix.m[15];
                        this._rotated.x = ((this._normal.x * this._rotMatrix.m[0]) + (this._normal.y * this._rotMatrix.m[4]) + (this._normal.z * this._rotMatrix.m[8]) + this._rotMatrix.m[12]) / this._w;
                        this._rotated.y = ((this._normal.x * this._rotMatrix.m[1]) + (this._normal.y * this._rotMatrix.m[5]) + (this._normal.z * this._rotMatrix.m[9]) + this._rotMatrix.m[13]) / this._w;
                        this._rotated.z = ((this._normal.x * this._rotMatrix.m[2]) + (this._normal.y * this._rotMatrix.m[6]) + (this._normal.z * this._rotMatrix.m[10]) + this._rotMatrix.m[14]) / this._w;
                        this._normals32[idx] = this._cam_axisX.x * this._rotated.x + this._cam_axisY.x * this._rotated.y + this._cam_axisZ.x * this._rotated.z;
                        this._normals32[idx + 1] = this._cam_axisX.y * this._rotated.x + this._cam_axisY.y * this._rotated.y + this._cam_axisZ.y * this._rotated.z;
                        this._normals32[idx + 2] = this._cam_axisX.z * this._rotated.x + this._cam_axisY.z * this._rotated.y + this._cam_axisZ.z * this._rotated.z;
                    }
                    if (this._computeParticleColor) {
                        this._colors32[colidx] = this._particle.color.r;
                        this._colors32[colidx + 1] = this._particle.color.g;
                        this._colors32[colidx + 2] = this._particle.color.b;
                        this._colors32[colidx + 3] = this._particle.color.a;
                    }
                    if (this._computeParticleTexture) {
                        this._uvs32[uvidx] = this._shapeUV[pt * 2] * (this._particle.uvs.z - this._particle.uvs.x) + this._particle.uvs.x;
                        this._uvs32[uvidx + 1] = this._shapeUV[pt * 2 + 1] * (this._particle.uvs.w - this._particle.uvs.y) + this._particle.uvs.y;
                    }
                }
                index = idx + 3;
                colorIndex = colidx + 4;
                uvIndex = uvidx + 2;
            }
            if (update) {
                if (this._computeParticleColor) {
                    this.mesh.updateVerticesData(BABYLON.VertexBuffer.ColorKind, this._colors32, false, false);
                }
                if (this._computeParticleTexture) {
                    this.mesh.updateVerticesData(BABYLON.VertexBuffer.UVKind, this._uvs32, false, false);
                }
                this.mesh.updateVerticesData(BABYLON.VertexBuffer.PositionKind, this._positions32, false, false);
                if (!this.mesh.areNormalsFrozen) {
                    if (this._computeParticleVertex || this.billboard) {
                        // recompute the normals only if the particles can be morphed, update then the normal reference array
                        BABYLON.VertexData.ComputeNormals(this._positions32, this._indices, this._normals32);
                        for (var i = 0; i < this._normals32.length; i++) {
                            this._fixedNormal32[i] = this._normals32[i];
                        }
                    }
                    this.mesh.updateVerticesData(BABYLON.VertexBuffer.NormalKind, this._normals32, false, false);
                }
            }
            if (this._computeBoundingBox) {
                this.mesh._boundingInfo = new BABYLON.BoundingInfo(this._minimum, this._maximum);
                this.mesh._boundingInfo.update(this.mesh._worldMatrix);
            }
            this.afterUpdateParticles(start, end, update);
        };
        SolidParticleSystem.prototype._quaternionRotationYPR = function () {
            this._halfroll = this._roll * 0.5;
            this._halfpitch = this._pitch * 0.5;
            this._halfyaw = this._yaw * 0.5;
            this._sinRoll = Math.sin(this._halfroll);
            this._cosRoll = Math.cos(this._halfroll);
            this._sinPitch = Math.sin(this._halfpitch);
            this._cosPitch = Math.cos(this._halfpitch);
            this._sinYaw = Math.sin(this._halfyaw);
            this._cosYaw = Math.cos(this._halfyaw);
            this._quaternion.x = (this._cosYaw * this._sinPitch * this._cosRoll) + (this._sinYaw * this._cosPitch * this._sinRoll);
            this._quaternion.y = (this._sinYaw * this._cosPitch * this._cosRoll) - (this._cosYaw * this._sinPitch * this._sinRoll);
            this._quaternion.z = (this._cosYaw * this._cosPitch * this._sinRoll) - (this._sinYaw * this._sinPitch * this._cosRoll);
            this._quaternion.w = (this._cosYaw * this._cosPitch * this._cosRoll) + (this._sinYaw * this._sinPitch * this._sinRoll);
        };
        SolidParticleSystem.prototype._quaternionToRotationMatrix = function () {
            this._rotMatrix.m[0] = 1.0 - (2.0 * (this._quaternion.y * this._quaternion.y + this._quaternion.z * this._quaternion.z));
            this._rotMatrix.m[1] = 2.0 * (this._quaternion.x * this._quaternion.y + this._quaternion.z * this._quaternion.w);
            this._rotMatrix.m[2] = 2.0 * (this._quaternion.z * this._quaternion.x - this._quaternion.y * this._quaternion.w);
            this._rotMatrix.m[3] = 0;
            this._rotMatrix.m[4] = 2.0 * (this._quaternion.x * this._quaternion.y - this._quaternion.z * this._quaternion.w);
            this._rotMatrix.m[5] = 1.0 - (2.0 * (this._quaternion.z * this._quaternion.z + this._quaternion.x * this._quaternion.x));
            this._rotMatrix.m[6] = 2.0 * (this._quaternion.y * this._quaternion.z + this._quaternion.x * this._quaternion.w);
            this._rotMatrix.m[7] = 0;
            this._rotMatrix.m[8] = 2.0 * (this._quaternion.z * this._quaternion.x + this._quaternion.y * this._quaternion.w);
            this._rotMatrix.m[9] = 2.0 * (this._quaternion.y * this._quaternion.z - this._quaternion.x * this._quaternion.w);
            this._rotMatrix.m[10] = 1.0 - (2.0 * (this._quaternion.y * this._quaternion.y + this._quaternion.x * this._quaternion.x));
            this._rotMatrix.m[11] = 0;
            this._rotMatrix.m[12] = 0;
            this._rotMatrix.m[13] = 0;
            this._rotMatrix.m[14] = 0;
            this._rotMatrix.m[15] = 1.0;
        };
        /**
        * Disposes the SPS
        */
        SolidParticleSystem.prototype.dispose = function () {
            this.mesh.dispose();
            this.vars = null;
            // drop references to internal big arrays for the GC
            this._positions = null;
            this._indices = null;
            this._normals = null;
            this._uvs = null;
            this._colors = null;
            this._positions32 = null;
            this._normals32 = null;
            this._fixedNormal32 = null;
            this._uvs32 = null;
            this._colors32 = null;
            this.pickedParticles = null;
        };
        /**
        *  Visibilty helper : Recomputes the visible size according to the mesh bounding box
        * doc : http://doc.babylonjs.com/tutorials/Solid_Particle_System#sps-visibility
        */
        SolidParticleSystem.prototype.refreshVisibleSize = function () {
            if (!this._isVisibilityBoxLocked) {
                this.mesh.refreshBoundingInfo();
            }
        };
        /** Visibility helper : Sets the size of a visibility box, this sets the underlying mesh bounding box.
        * @param size the size (float) of the visibility box
        * note : this doesn't lock the SPS mesh bounding box.
        * doc : http://doc.babylonjs.com/tutorials/Solid_Particle_System#sps-visibility
        */
        SolidParticleSystem.prototype.setVisibilityBox = function (size) {
            var vis = size / 2;
            this.mesh._boundingInfo = new BABYLON.BoundingInfo(new BABYLON.Vector3(-vis, -vis, -vis), new BABYLON.Vector3(vis, vis, vis));
        };
        Object.defineProperty(SolidParticleSystem.prototype, "isAlwaysVisible", {
            // getter and setter
            /**
            * True if the SPS is set as always visible
            */
            get: function () {
                return this._alwaysVisible;
            },
            /**
            * Sets the SPS as always visible or not
            * doc : http://doc.babylonjs.com/tutorials/Solid_Particle_System#sps-visibility
            */
            set: function (val) {
                this._alwaysVisible = val;
                this.mesh.alwaysSelectAsActiveMesh = val;
            },
            enumerable: true,
            configurable: true
        });
        Object.defineProperty(SolidParticleSystem.prototype, "isVisibilityBoxLocked", {
            /**
            * True if the SPS visibility box is locked. The underlying mesh bounding box is then not updatable any more.
            */
            get: function () {
                return this._isVisibilityBoxLocked;
            },
            /**
            * Sets the SPS visibility box as locked or not. This enables/disables the underlying mesh bounding box updates.
            * doc : http://doc.babylonjs.com/tutorials/Solid_Particle_System#sps-visibility
            */
            set: function (val) {
                this._isVisibilityBoxLocked = val;
                this.mesh.getBoundingInfo().isLocked = val;
            },
            enumerable: true,
            configurable: true
        });
        Object.defineProperty(SolidParticleSystem.prototype, "computeParticleRotation", {
            // getters
            get: function () {
                return this._computeParticleRotation;
            },
            // Optimizer setters
            /**
            * Tells to setParticles() to compute the particle rotations or not.
            * Default value : true. The SPS is faster when it's set to false.
            * Note : the particle rotations aren't stored values, so setting computeParticleRotation to false will prevents the particle to rotate.
            */
            set: function (val) {
                this._computeParticleRotation = val;
            },
            enumerable: true,
            configurable: true
        });
        Object.defineProperty(SolidParticleSystem.prototype, "computeParticleColor", {
            get: function () {
                return this._computeParticleColor;
            },
            /**
            * Tells to setParticles() to compute the particle colors or not.
            * Default value : true. The SPS is faster when it's set to false.
            * Note : the particle colors are stored values, so setting computeParticleColor to false will keep yet the last colors set.
            */
            set: function (val) {
                this._computeParticleColor = val;
            },
            enumerable: true,
            configurable: true
        });
        Object.defineProperty(SolidParticleSystem.prototype, "computeParticleTexture", {
            get: function () {
                return this._computeParticleTexture;
            },
            /**
            * Tells to setParticles() to compute the particle textures or not.
            * Default value : true. The SPS is faster when it's set to false.
            * Note : the particle textures are stored values, so setting computeParticleTexture to false will keep yet the last colors set.
            */
            set: function (val) {
                this._computeParticleTexture = val;
            },
            enumerable: true,
            configurable: true
        });
        Object.defineProperty(SolidParticleSystem.prototype, "computeParticleVertex", {
            get: function () {
                return this._computeParticleVertex;
            },
            /**
            * Tells to setParticles() to call the vertex function for each vertex of each particle, or not.
            * Default value : false. The SPS is faster when it's set to false.
            * Note : the particle custom vertex positions aren't stored values.
            */
            set: function (val) {
                this._computeParticleVertex = val;
            },
            enumerable: true,
            configurable: true
        });
        Object.defineProperty(SolidParticleSystem.prototype, "computeBoundingBox", {
            get: function () {
                return this._computeBoundingBox;
            },
            /**
            * Tells to setParticles() to compute or not the mesh bounding box when computing the particle positions.
            */
            set: function (val) {
                this._computeBoundingBox = val;
            },
            enumerable: true,
            configurable: true
        });
        // =======================================================================
        // Particle behavior logic
        // these following methods may be overwritten by the user to fit his needs
        /**
        * This function does nothing. It may be overwritten to set all the particles first values.
        * The SPS doesn't call this function, you may have to call it by your own.
        * doc : http://doc.babylonjs.com/tutorials/Solid_Particle_System#particle-management
        */
        SolidParticleSystem.prototype.initParticles = function () {
        };
        /**
        * This function does nothing. It may be overwritten to recycle a particle.
        * The SPS doesn't call this function, you may have to call it by your own.
        * doc : http://doc.babylonjs.com/tutorials/Solid_Particle_System#particle-management
        */
        SolidParticleSystem.prototype.recycleParticle = function (particle) {
            return particle;
        };
        /**
        * Updates a particle : this function should  be overwritten by the user.
        * It is called on each particle by setParticles(). This is the place to code each particle behavior.
        * doc : http://doc.babylonjs.com/tutorials/Solid_Particle_System#particle-management
        * ex : just set a particle position or velocity and recycle conditions
        */
        SolidParticleSystem.prototype.updateParticle = function (particle) {
            return particle;
        };
        /**
        * Updates a vertex of a particle : it can be overwritten by the user.
        * This will be called on each vertex particle by setParticles() if computeParticleVertex is set to true only.
        * @param particle the current particle
        * @param vertex the current index of the current particle
        * @param pt the index of the current vertex in the particle shape
        * doc : http://doc.babylonjs.com/tutorials/Solid_Particle_System#update-each-particle-shape
        * ex : just set a vertex particle position
        */
        SolidParticleSystem.prototype.updateParticleVertex = function (particle, vertex, pt) {
            return vertex;
        };
        /**
        * This will be called before any other treatment by setParticles() and will be passed three parameters.
        * This does nothing and may be overwritten by the user.
        * @param start the particle index in the particle array where to stop to iterate, same than the value passed to setParticle()
        * @param stop the particle index in the particle array where to stop to iterate, same than the value passed to setParticle()
        * @param update the boolean update value actually passed to setParticles()
        */
        SolidParticleSystem.prototype.beforeUpdateParticles = function (start, stop, update) {
        };
        /**
        * This will be called  by setParticles() after all the other treatments and just before the actual mesh update.
        * This will be passed three parameters.
        * This does nothing and may be overwritten by the user.
        * @param start the particle index in the particle array where to stop to iterate, same than the value passed to setParticle()
        * @param stop the particle index in the particle array where to stop to iterate, same than the value passed to setParticle()
        * @param update the boolean update value actually passed to setParticles()
        */
        SolidParticleSystem.prototype.afterUpdateParticles = function (start, stop, update) {
        };
        return SolidParticleSystem;
    })();
    BABYLON.SolidParticleSystem = SolidParticleSystem;
})(BABYLON || (BABYLON = {}));