Pulse Particles + BitmapData

/*This examples creates three particle emitters.

Each of those emitters is on a container sprite which is not in the display list.

We have an ENTER_FRAME event handler which copies the image from those containers to a BitmapData object which is displayed on screen.  Everyframe we also apply a color transformation to cause previous draws to fade out.  This leaves a pleasing trail.

Finally, we use Tweener to rotate, scale, and position the containers randomly giving some fairly interesting visual behavior.*/package{import caurina.transitions.Tweener;

import com.roguedevelopment.pulse.emitter.GenericEmitter;import com.roguedevelopment.pulse.simple.SimpleParticles;

import flash.display.Bitmap;import flash.display.BitmapData;import flash.display.Sprite;import flash.events.Event;import flash.events.TimerEvent;import flash.filters.BitmapFilter;import flash.filters.ColorMatrixFilter;import flash.geom.Matrix;import flash.geom.Point;import flash.geom.Rectangle;import flash.utils.Timer;

[SWF(backgroundColor="#000000", frameRate="30", width="500", height="350")]public class StarPower extends Sprite{protected var containers:Array = [];protected var timer:Timer;protected var ease:int = 0;

[Embed(source="example_assets/star.png")]protected var star:Class;[Embed(source="example_assets/spark.png")]protected var spark:Class;[Embed(source="example_assets/snowflake.png")]protected var snow:Class;

protected var bmd:BitmapData;protected var bm:Bitmap;protected var fullRect:Rectangle = new Rectangle(0,0,500,350);protected var origin:Point = new Point(0,0);

protected var filterz:Array = [   //new BlurFilter( 1, 1, 1 ) ,        new ColorMatrixFilter( [ 1,0,0,0,0,0,1,0,0,0,0,0,1,0,0,0,0,0,0.85,0 ] ) ];

public function StarPower(){super();

addEmitter(star,10);addEmitter(snow,5);addEmitter(spark,15);

bmd = new BitmapData(500,350,false,0x000000);bm = new Bitmap( bmd );addChild(bm);

stage.scaleMode = "noScale";onTimer(null);timer = new Timer(5000);timer.addEventListener(TimerEvent.TIMER, onTimer );timer.start();addEventListener(Event.ENTER_FRAME, onEnterFrame );}

protected function onEnterFrame(event:Event) : void{// First, apply any filters we set up, in this example it's just the one color transformfor each (var filter:BitmapFilter in filterz ){bmd.applyFilter( bmd, fullRect, origin, filter );}

// Then, for each of our particle containers, copy that to the bitmap with the appropriate transformations.for each ( var container:Sprite in containers ){var m:Matrix = new Matrix();// container.x, container.y);m.rotate( container.rotation * Math.PI / 180);m.translate( container.x, container.y );m.scale( container.scaleX, container.scaleY );bmd.draw(container,m);}}

/*** This creates a simple emitter that was configured using the particle explorer.**/protected function addEmitter( image:Class, pps:Number ) : void{var container:Sprite = new Sprite();    var emitter:GenericEmitter = SimpleParticles.createEmitter({pps:pps,x:100, image:image, y:100, width:1, height:1,size:15, color:2588900, movement:true, minSpeed:63.3, maxSpeed:353.6, minAngle:0, maxAngle:360, minScale:0.2, maxScale:1, lifespan:3140} ) as GenericEmitter;emitter.root = container;emitter.start();containers.push(container);}

// Every 5 seconds we cause the containers to go through a new random tweeningprotected function onTimer(e:Event) : void{for each( var container:Sprite in containers ){animateContainer( container );}}

protected function animateContainer(container:Sprite) : void{var eases:Array = ["easeinoutsine","easeoutcirc","easeoutback","easeoutbounce","easeoutelastic"];var scale:Number = Math.random()  + 0.05;ease++; ease %= 5;Tweener.addTween( container, { y:Math.random() * 350, x:Math.random()*500, scaleX:scale,  scaleY:scale, time:5, transition:eases[ease] });Tweener.addTween(container, {rotation: Math.random() * 360, time:5, transition:eases[ease] }) ;}}}