Fix particle shader

dist/preview release/viewer/babylon.viewer.d.ts

@@ -924,7 +924,7 @@ declare module BabylonViewer {
       * @param name the name of the custom optimizer configuration
       * @param upgrade set to true if you want to upgrade optimizer and false if you want to degrade
       */
-    export function getCustomOptimizerByName(name: string, upgrade?: boolean): (sceneManager: SceneManager) => boolean;
+    export function getCustomOptimizerByName(name: string, upgrade?: boolean): typeof extendedUpgrade;
     export function registerCustomOptimizer(name: string, optimizer: (sceneManager: SceneManager) => boolean): void;
 }
 declare module BabylonViewer {
@@ -1558,6 +1558,20 @@ declare module BabylonViewer {
     export function addLoaderPlugin(name: string, plugin: ILoaderPlugin): void;
 }
 declare module BabylonViewer {
+    /**
+        * A custom upgrade-oriented function configuration for the scene optimizer.
+        *
+        * @param viewer the viewer to optimize
+        */
+    export function extendedUpgrade(sceneManager: SceneManager): boolean;
+    /**
+        * A custom degrade-oriented function configuration for the scene optimizer.
+        *
+        * @param viewer the viewer to optimize
+        */
+    export function extendedDegrade(sceneManager: SceneManager): boolean;
+}
+declare module BabylonViewer {
 }
 declare module BabylonViewer {
     export interface IEnvironmentMapConfiguration {

dist/preview release/viewer/babylon.viewer.module.d.ts

@@ -985,13 +985,14 @@ declare module 'babylonjs-viewer/templating/viewerTemplatePlugin' {
 }
 
 declare module 'babylonjs-viewer/optimizer/custom' {
+    import { extendedUpgrade } from "babylonjs-viewer/optimizer/custom/extended";
     import { SceneManager } from "babylonjs-viewer/managers/sceneManager";
     /**
       *
       * @param name the name of the custom optimizer configuration
       * @param upgrade set to true if you want to upgrade optimizer and false if you want to degrade
       */
-    export function getCustomOptimizerByName(name: string, upgrade?: boolean): (sceneManager: SceneManager) => boolean;
+    export function getCustomOptimizerByName(name: string, upgrade?: boolean): typeof extendedUpgrade;
     export function registerCustomOptimizer(name: string, optimizer: (sceneManager: SceneManager) => boolean): void;
 }
 
@@ -1662,6 +1663,22 @@ declare module 'babylonjs-viewer/loader/plugins' {
     export function addLoaderPlugin(name: string, plugin: ILoaderPlugin): void;
 }
 
+declare module 'babylonjs-viewer/optimizer/custom/extended' {
+    import { SceneManager } from 'babylonjs-viewer/managers/sceneManager';
+    /**
+        * A custom upgrade-oriented function configuration for the scene optimizer.
+        *
+        * @param viewer the viewer to optimize
+        */
+    export function extendedUpgrade(sceneManager: SceneManager): boolean;
+    /**
+        * A custom degrade-oriented function configuration for the scene optimizer.
+        *
+        * @param viewer the viewer to optimize
+        */
+    export function extendedDegrade(sceneManager: SceneManager): boolean;
+}
+
 declare module 'babylonjs-viewer/configuration/interfaces' {
     export * from 'babylonjs-viewer/configuration/interfaces/cameraConfiguration';
     export * from 'babylonjs-viewer/configuration/interfaces/colorGradingConfiguration';

src/Shaders/gpuRenderParticles.vertex.fx

@@ -47,7 +47,6 @@ uniform vec3 sheetInfos;
 	uniform vec3 eyePosition;	
 #endif
 	
-#ifdef BILLBOARDY		
 vec3 rotate(vec3 yaxis, vec3 rotatedCorner) {
 	vec3 xaxis = normalize(cross(vec3(0., 1.0, 0.), yaxis));
 	vec3 zaxis = normalize(cross(yaxis, xaxis));
@@ -62,7 +61,6 @@ vec3 rotate(vec3 yaxis, vec3 rotatedCorner) {
 
 	return position + alignedCorner;
 }
-#endif
 
 #ifdef BILLBOARDSTRETCHED
 vec3 rotateAlign(vec3 toCamera, vec3 rotatedCorner) {

src/Shaders/particles.vertex.fx

@@ -43,7 +43,6 @@ uniform mat4 invView;
 	uniform vec3 eyePosition;	
 #endif
 
-#ifdef BILLBOARDY	
 vec3 rotate(vec3 yaxis, vec3 rotatedCorner) {
 	vec3 xaxis = normalize(cross(vec3(0., 1.0, 0.), yaxis));
 	vec3 zaxis = normalize(cross(yaxis, xaxis));
@@ -57,7 +56,6 @@ vec3 rotate(vec3 yaxis, vec3 rotatedCorner) {
 	vec3 alignedCorner = rotMatrix * rotatedCorner;
 	return position + alignedCorner; 
 }
-#endif
 
 #ifdef BILLBOARDSTRETCHED
 vec3 rotateAlign(vec3 toCamera, vec3 rotatedCorner) {