forked from: pentagonal kaleidoscope

/**
 * Copyright hacker_rur__k1j ( http://wonderfl.net/user/hacker_rur__k1j )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/g2UO
 */

// forked from uwi's pentagonal kaleidoscope
// forked from checkmate's fladdict challenge for amateurs
/**
 * Every frame you get screen caputre of the stage.
 * Generate new frame image with using last frames screen capture.
 * This is a starting point of recursive generative art.
 */
package {
    import flash.display.Bitmap;
    import flash.display.BitmapData;
    import flash.display.BlendMode;
    import flash.display.Sprite;
    import flash.events.Event;
    import flash.geom.ColorTransform;
    import flash.geom.Matrix;
    import flash.geom.Point;
    import flash.geom.Rectangle;
    
    public class Beginner extends Sprite {
        /**
         * Overwrite this update function.
         * Every frame the function is invoked with two bitmaps.
         * First one contains reference to the stage bitmap.
         * Second one contains static copy of stage.
         */
         
        public var canvas:BitmapData;
        public var drawHere:BitmapData;
        public var mat:Matrix;
         
        public function update():void{
            drawStep();
            transformStep();
            
            renderStep();
            fadeStep();
        }
        
        
        public function drawStep():void {
//            drawHere.setPixel(stage.mouseX, stage.mouseY, 0x11111111);
//            drawHere.setPixel( Math.random()*480, Math.random()*480, 0xffffffff);
//            drawHere.fillRect(new Rectangle(Math.random() * 480, Math.random() * 480, 20, 20), Math.random() * 0xffffffff);
            var cx : Number = 240 - 50 + Math.random() * 100;
            var cy : Number = 240 - 50 + Math.random() * 100;
//            drawHere.fillRect(new Rectangle(cx - 10, cy - 10, 20, 20), col);
            drawHere.fillRect(new Rectangle(cx - 10, cy - 10, 20, 20), Math.random() * 0xffffff);
        }
    
        
        public function transformStep():void
        {
            mat = new Matrix();
            mat.translate(-240,-240);
//            mat.scale(1.005,1.005);
            mat.scale(1.02,1.02);
//            mat.rotate(1.5+Math.random() * 0.1);
            mat.rotate(6.28/5);
            mat.translate(240,240);
        }
        
        private var _t : int = 0;
        
        public function renderStep():void{
            canvas.draw(drawHere, mat, null,(_t++ & 1) == 1 ? BlendMode.LIGHTEN : BlendMode.DARKEN);
        }
        
        
        public function fadeStep():void
        {
//            canvas.colorTransform(drawHere.rect, new ColorTransform(1,1,1,1,1,1,1,0)); 
//            canvas.colorTransform(drawHere.rect, new ColorTransform(Math.random()*0.4+0.6,Math.random()*0.4+0.6,Math.random()*0.4+0.6,1,0,0,0,0)); 
        }
        
        
        /**
         * ---------------------------------------
         * DO NOT CHANGE FOLLOWING CODES
         * DO NOT ACCESS FOLLOWING PROPERTIES DIRECTLY
         * ---------------------------------------
        */
        
       
        private var bitmap:Bitmap;
        
        
        public function Beginner() {
            canvas = new BitmapData(480,480,false,0x000000);
            bitmap = new Bitmap(canvas);
            addChild(bitmap);
            addEventListener(Event.ENTER_FRAME, _update);
        }
        
        public function _update(e:Event):void{
            if(drawHere)
                drawHere.dispose();
            drawHere = canvas.clone();
            update();
        }
    }
}