startDelay

dist/preview release/what's new.md

@@ -44,6 +44,7 @@
   - Attached sub emitters. [Doc](http://doc.babylonjs.com/how_to/sub_emitters) ([TrevorDev](https://github.com/TrevorDev))
   - Cylinder particle emitter and constructor in baseParticle [Doc](https://doc.babylonjs.com/babylon101/particles#cylinder-emitter) ([TrevorDev](https://github.com/TrevorDev))
   - Added support for cylinder particle emitter. [Doc](https://doc.babylonjs.com/babylon101/particles#cylinder-emitter) ([TrevorDev](https://github.com/TrevorDev))
+  - Added startDelay to support delaying system start of sub emitters [Doc](https://doc.babylonjs.com/babylon101/particles#creating-the-particles) ([TrevorDev](https://github.com/TrevorDev))
   - Added support for random start cell when using animated sprite sheets. [Doc](http://doc.babylonjs.com/how_to/animate)
 - Added SceneComponent to help decoupling Scene from its components. ([sebavan](http://www.github.com/sebavan))
 - Added [Environment Texture Tools](https://doc.babylonjs.com/how_to/physically_based_rendering#creating-a-compressed-environment-texture) to reduce the size of the usual .DDS file ([sebavan](http://www.github.com/sebavan))

src/Particles/babylon.baseParticleSystem.ts

@@ -274,6 +274,11 @@ module BABYLON {
         }
 
         /**
+         * Defines the delay in milliseconds before starting the system (0 by default)
+         */
+        public startDelay = 0;
+
+        /**
          * Gets the current list of drag gradients.
          * You must use addDragGradient and removeDragGradient to udpate this list
          * @returns the list of drag gradients

src/Particles/babylon.gpuParticleSystem.ts

@@ -117,9 +117,12 @@
 
         /**
          * Starts the particle system and begins to emit
-         * @param delay defines the delay in milliseconds before starting the system (0 by default)
+         * @param delay defines the delay in milliseconds before starting the system (this.startDelay by default)
          */
-        public start(delay = 0): void {
+        public start(delay = this.startDelay): void {
+            if(!this.targetStopDuration && this._hasTargetStopDurationDependantGradient()){
+                throw "Particle system started with a targetStopDuration dependant gradient (eg. startSizeGradients) but no targetStopDuration set";
+            }
             if (delay) {
                 setTimeout(()=> {
                     this.start(0);

src/Particles/babylon.particleSystem.ts

@@ -997,9 +997,9 @@
 
         /**
          * Starts the particle system and begins to emit
-         * @param delay defines the delay in milliseconds before starting the system (0 by default)
+         * @param delay defines the delay in milliseconds before starting the system (this.startDelay by default)
          */
-        public start(delay = 0): void {
+        public start(delay = this.startDelay): void {
             if(!this.targetStopDuration && this._hasTargetStopDurationDependantGradient()){
                 throw "Particle system started with a targetStopDuration dependant gradient (eg. startSizeGradients) but no targetStopDuration set";
             }