Merge pull request #796 from jbousquie/fix.SPS

Fix.sps

src/Particles/babylon.solidParticleSystem.ts

@@ -8,6 +8,7 @@ module BABYLON {
         public counter: number = 0;
         public name: string;
         public mesh: Mesh;
+        public vars: any = {};
         
         // private members
         private _scene: Scene;
@@ -57,6 +58,7 @@ module BABYLON {
         private _cosPitch: number = 0.0;
         private _sinYaw: number = 0.0;
         private _cosYaw: number = 0.0;
+        private _w: number = 0.0;
 
 
         constructor(name: string, scene: Scene, options?: { updatable?: boolean }) {
@@ -398,7 +400,11 @@ module BABYLON {
                     this._vertex.y *= this._particle.scale.y;
                     this._vertex.z *= this._particle.scale.z;
 
-                    Vector3.TransformCoordinatesToRef(this._vertex, this._rotMatrix, this._rotated);
+                    //Vector3.TransformCoordinatesToRef(this._vertex, this._rotMatrix, this._rotated);
+                    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;
@@ -475,6 +481,7 @@ module BABYLON {
         // dispose the SPS
         public dispose(): void {
             this.mesh.dispose();
+            this.vars = null;
             // drop references to internal big arrays for the GC
             this._positions = null;
             this._indices = null;