简单的赛平斯基垫片

1.构建小球精灵

package 
{
    import flash.display.Sprite;

    public class Ball extends Sprite
    {
        public var radius:Number;
        public var color:uint;

        public function Ball (radius:Number,color:uint)
        {
            this.radius=radius;
            this.color=color;
            Init ();
        }
        public function Init ():void
        {
            graphics.beginFill (color);
            graphics.drawCircle (0,0,radius);
            graphics.endFill ();
        }
    }
}

2.构建赛平斯基垫片

package
{
    import flash.display.Sprite;
    
    public class Sierpinski extends Sprite
    {
        private var ball:Ball;
        private var balls:Array;
        private var numDots:int=1000;
        
        public function Sierpinski()
        {
            Init();
        }
        private function Init():void
        {
            balls=new Array();
            for(var i:int=0;i<numDots;i++)
            {
                var ball=new Ball(1,0xFF0000);
                addChild(ball);
                balls.push(ball);
            }
            balls[0].x=10;
            balls[0].y=10;
            balls[1].x=400;
            balls[1].y=30;
            balls[2].x=200;
            balls[2].y=300;
            
            for(var i:int=0;i<numDots-1;i++)
            {
                var index:int=Math.random()*3;
                balls[i+1].x=(balls[i].x+balls[index].x)/2;
                balls[i+1].y=(balls[i].y+balls[index].y)/2;
            }
        }
    }
}

 

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