flash on 2010-1-24

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

package {
	import flash.accessibility.Accessibility;
	import flash.events.Event;
    import flash.display.Sprite;
    public class FlashTest extends Sprite {
        
        public var centerBall:ball;
        public var centerRadius:int = 50;
        public var centerDists:Array;
        public var ballNum:int = 10;
        
        public var bounce:int = -1;
        
        public var balls:Array;
        
        public function FlashTest() {
			   init();      
        }
        
        public function init():void{
        		centerBall = new ball(centerRadius, 0xFF0000);
        	 	addChild(centerBall);
        	 	centerBall.x = stage.stageWidth / 2;
        	 	centerBall.y = stage.stageHeight / 2;
        	 	
        	 	balls = [];
        	 	for (var i:int = 0; i < ballNum;i++){
        	 			balls[i] = new ball(Math.random()*10+10, 0xFFFF00);
        	 			addChild(balls[i]);
        	 			balls[i].x = Math.random()*stage.stageWidth;
        	 			balls[i].y = Math.random()*stage.stageHeight;
        	 		    
        	 		    balls[i].dx = Math.random()*20-10;
        	 		    balls[i].dy = Math.random()*20-10;
        	 	}
        	 	
        	 	addEventListener(Event.ENTER_FRAME, enterframe);
        }
        
        public function enterframe(e:Event):void{
        		
        		for (var i:int = 0; i < ballNum; i++ ){
	        		balls[i].x += balls[i].dx;
 	       		balls[i].y += balls[i].dy;
 	       		
 	       		if (balls[i].x + balls[i].radius > stage.stageWidth){
 	       			balls[i].x = stage.stageWidth - balls[i].radius;
 	       			balls[i].dx *= bounce;	
 	       			balls[i].dx *= 0.6;
 	       		}
 	       		if (balls[i].x < balls[i].radius){
 	       			balls[i].x = balls[i].radius;
 	       			balls[i].dx *= bounce;
 	       			balls[i].dx *= 0.6;
 	       		}
 	       		
 	       		if (balls[i].y + balls[i].radius > stage.stageHeight){
 	       			balls[i].y = stage.stageHeight - balls[i].radius;
 	       			balls[i].dy *= bounce;
 	       			balls[i].dy *= 0.6;
 	       		}
 	       		if (balls[i].y < balls[i].radius){
 	       			balls[i].y = balls[i].radius;
 	       			balls[i].dy *= bounce;
 	       			balls[i].dy *= 0.6;
 	       		}
 	       		
 	       		var dx:int = centerBall.x - balls[i].x;
 	       		var dy:int = centerBall.y - balls[i].y;
 	       		var dist:int = Math.sqrt(dx * dx + dy * dy );
 	       		if (dist < centerRadius + balls[i].radius){
 	       			balls[i].dx *= 1.1;
 	       			balls[i].dy *= 1.1;
 	       			
 	       			var angle:Number = Math.atan2(dy,dx);
				    if (angle < 90){
				    	   balls[i].dx *= bounce;
 	      		    }else if (angle < 180){
				       balls[i].dy *= bounce;
				    } else if (angle < 240) {
				    	
				    } else {
				    	
				    } 		
				 	       			
 	       		}
 	       		
 	       		
        		}      		
        			
        }
        
    }
}
import flash.display.Sprite;

class ball extends Sprite {
	
	public var radius:int;
	public var color:uint;
	public var dx:Number;
	public var dy:Number;
		
	public function ball (rad:int =10,clr:uint=0x000000):void {
		this.radius = rad;
		this.color = clr;
		init();
	}
	
	public function init():void{
		graphics.beginFill(color);
		graphics.drawCircle(0,0,radius);
		graphics.endFill();	
	}
}