Sierpinski Gasket

by bungadunga 15 Feb 2009

Embed

package {
    import flash.display.Sprite;
    import flash.display.*;
    import flash.geom.Point;
    public class FlashTest extends Sprite {
        public function FlashTest() {
            // write as3 code here..
            var x:uint = Math.random()*100;
            var y:uint = Math.random()*100;
            var ratio:Number = 2/3;
            var num:uint = 6;

            var data:BitmapData = new BitmapData(stage.stageWidth,stage.stageHeight,false,0x000000)
            var verts:Array = genPoly(200,250,200,num);//[0,400,400,400,200,50]
            //data.setPixel(x,y,0xFF00FF);

            var j:uint = 0;
            var rand:uint = 0;
            for(j=0;j<100000;j++){
                rand = Math.random()*verts.length/2;
                x += (-x + verts[2*rand])*ratio;
                y += (-y + verts[2*rand+1])*ratio;
                if(j>10)
                    data.setPixel(x,y,0x0000FF);
            }
            var disp:Bitmap = new Bitmap(data);
            addChild(disp)
        }
        public function genPoly(cx:uint,cy:uint,r:uint,n:uint):Array{
            var ret:Array = new Array()
            for(var i:uint=0;i<n;i++){
                ret.push(r*Math.cos(2*Math.PI/n*(i+.25))+cx)
                ret.push(r*Math.sin(2*Math.PI/n*(i+.25))+cy)
            }
            return(ret)
        }
    }
}