flash on 2013-6-10

/**
 * Copyright mutantleg ( http://wonderfl.net/user/mutantleg )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/As3C
 */

package {
    import flash.geom.Point;
    import flash.geom.Rectangle;
    import flash.display.BitmapData;
    import flash.display.Bitmap;
    import flash.events.Event;
    import flash.display.Sprite;
    public class FlashTest extends Sprite {
        public function FlashTest() {
            
            back = new BitmapData(320,240,false,0);
           // back.fillRect(back.rect, 0);
            back.noise(123);
            
            tempRect.x = 60;
            tempRect.y = 0;
            tempRect.width = 64;
            tempRect.height = 240;
            //back.fillRect(tempRect, 0xFF0000);
            
            canvas = new BitmapData(320, 240, false, 0);
            
            pic = new Bitmap(canvas);
            
            addChild(pic);
            
            stage.addEventListener(Event.ENTER_FRAME, onEnter);
        }//ctor

        public var pic:Bitmap;
        public var canvas:BitmapData;
        public var back:BitmapData;
        
        public var ang:Number = 0;
        
        public var tempRect:Rectangle = new Rectangle();
        public var tempPnt:Point = new Point();
        public function onEnter(e:Event):void
        {
            
            var tr:Rectangle;
            var tp:Point;
            var i:int;
            var ta:Number;
            
            
            tr = tempRect;
            tp = tempPnt;
            
            canvas.lock();
            
            canvas.fillRect(canvas.rect, 0);
            
            tr.width = 320;
            tr.height = 1;
            tr.x = 0;
            tr.y = 0;
            
            ang += 0.01;
        //    if (ang >= 1.0) { ang = 0;}
         //   ta = ang;
         
         var k:int;
            
            for (i = 0; i < 240; i++)
            {
              //  ta += 0.3;
               // if (ta > 1.0) { ta = 0;}
                tp.y = i;
                tr.y = i;
                k = (120-i)*2;// (240-i)*0.25;
                if (i > 120) { k =(240-( 240 - i)*2);}
                tp.x = ((ang*((k)*0.01)) *320) % 320 - 320;
              //  tp.x = ta *(i/240) * 320 - 320;
                //tp.x = (Math.sin(ta)+1.0)*160 - 320;
               // tp.x = ((Math.sin(ta)*Math.cos(ta)) * 320) - 320;
                canvas.copyPixels(back, tr, tp);
                tp.x += 320; // +320;
                canvas.copyPixels(back, tr, tp);
                
                
            }//nexti
            
            canvas.unlock();
        }//onenter
        
    }//classend
}