flash on 2010-11-2

/**
 * Copyright s.maeda0094 ( http://wonderfl.net/user/s.maeda0094 )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/z2O9
 */

package {
    import flash.display.Sprite;
    import flash.events.Event;
    public class BallFollowingMouse extends Sprite {
        private var ballCount:uint = 50;
        private var speed:Number= 0.2;
        public function BallFollowingMouse() {
            for (var i:uint= 0; i<ballCount; i++){
                addChild( new Ball(this,200));
            }
            addEventListener(Event.ENTER_FRAME, followMouse);
        }
        private function followMouse(eventObject:Event):void {
            dispatchEvent(new BallEvent(BallEvent.FOLLOW,mouseX,mouseY,speed));
        }
    }
}
import flash.display.Sprite;
import flash.display.Graphics;
import flash.events.Event;
class Ball extends Sprite {
    private const deceleration:Number = 0.2;
    private var angle:Number;
    private var radius:Number;
    private var sizeRate:Number = 0.1;
    public function Ball(timeline:Sprite, maxRadius:Number){
        var randomRate:Number = Math.random();
        angle = 2 * Math.PI * Math.random();
        radius = maxRadius * randomRate;
        createBall(randomRate);
        timeline.addEventListener(BallEvent.FOLLOW, follow);
    }
    private function createBall(randomRate:Number):void{
        var myGraphics:Graphics = graphics;
        myGraphics.beginFill(Math.floor(0xFFFFFF * randomRate) + 1);
        myGraphics.drawCircle(0,0,radius * sizeRate);
        alpha = 1 - randomRate;
    }
    private function follow(eventObject:BallEvent):void{
        var randomRate:Number = Math.random();
        angle += eventObject.speed;
        angle%=Math.PI*2;
        var nX:Number=eventObject.targetX+radius*Math.cos(angle);
        var nY:Number=eventObject.targetY+radius*Math.sin(angle);
        x += (nX - x) * deceleration * randomRate;
        y += (nX - y) * deceleration * randomRate;
    }
    }
class BallEvent extends Event {
    public static const FOLLOW:String="follow";    
    public function BallEvent(event_str:String,myTargetX:Number,myTargetY:Number,myspeed:Number){
        super(event_str);
    }




}