Ice Radar

/**
 * Copyright Venom ( http://wonderfl.net/user/Venom )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/klDx
 */

/**
 * Jason Smith 2010
 */
package {
    import flash.display.Sprite;
    import flash.display.Bitmap;
    import flash.display.BitmapData;
    import flash.display.BlendMode;
    import flash.geom.Point;
    import flash.geom.Rectangle;
    import flash.filters.BlurFilter;
    import flash.events.Event;
    
    [SWF(frameRate=31)]
    final public class IceNRadar extends Sprite {
        private const CENTRE:Number = 232.5;
        private const RADIUS:uint = 50;
        
        private var blur:BlurFilter = new BlurFilter(3,3,1);
        private var blur2:BlurFilter = new BlurFilter(2,2,1);
        
        private var bmd:BitmapData;
        private var bmd2:BitmapData;
        private var bmd3:BitmapData;
        
        private var canvas:Bitmap;
        private var canvas2:Bitmap;
        private var canvas3:Bitmap;

        public function IceNRadar() {
            init();  
        }
        
        private function init():void {
            bmd = new BitmapData(stage.stageWidth,stage.stageHeight,false,0x000000);
            canvas = new Bitmap(bmd);
            addChild(canvas);
            
            bmd2 = new BitmapData(stage.stageWidth,stage.stageHeight,false,0xFFFFFF);
            canvas2 = new Bitmap(bmd2);
            addChild(canvas2);
            canvas2.blendMode = BlendMode.ADD;
            
            bmd3 = new BitmapData(stage.stageWidth,stage.stageHeight,false,0xFFFFFF);
            canvas3 = new Bitmap(bmd3);
            addChild(canvas3);
            canvas3.blendMode = BlendMode.ADD;
            
            addEventListener("enterFrame",loop,false,0,true);
        }
        
        private var omega:Number = 0;
        private function loop(evt:Event):void {
            for (var i:uint = 0; i<100; i++) {
                for (var j:uint = 0; j<100; j++) {
                    var x:Number = CENTRE + Math.sin(omega)*RADIUS*i;
                    var y:Number = CENTRE + Math.cos(omega)*RADIUS*j;
                    bmd.setPixel(x,y,Math.random()*0xFFA9);
                    bmd2.setPixel(x,y,Math.random()*0xFFA9);
                    
                    var x2:Number = CENTRE + Math.cos(omega)*RADIUS;
                    bmd3.setPixel(x2,y,Math.random()*0xFFA9);
                }
            }
            bmd.applyFilter(bmd,bmd.rect,new Point(0,0),blur);
            bmd2.applyFilter(bmd2,bmd2.rect,new Point(0,0),blur2);
            bmd3.applyFilter(bmd2,bmd3.rect,new Point(0,0),blur2);
            omega++;
        }
    }
}