flash on 2014-10-3

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

package {
    import flash.display.Shape;
    import flash.geom.Matrix;
    import flash.geom.Point;
    import flash.geom.Rectangle;
    import flash.display.BitmapData;
    import flash.events.Event;
    import flash.display.Sprite;
    public class FlashTest extends Sprite {
        public function FlashTest() {
            
            canvas = new BitmapData(450,450, false, 0);
            map = new BitmapData(1024,1024, false, 0xFFffFFff);
            
                 
            //make random map   
            graphics.clear();
            var i:int;
            for (i =0; i < 64; i++)
            {
                graphics.beginFill(0+(Math.random()*64), 1);
                graphics.drawEllipse(256+Math.random()*512,Math.random()*256+512,Math.random()*256+32, Math.random()*256+32);
                
            }//nexti
            map.draw(this);
            
            
            stage.addEventListener(Event.ENTER_FRAME, onEnter);
        }//ctor
        
        public var canvas:BitmapData;
        public var map:BitmapData;
        public var camx:Number = 0;
        public var camy:Number = 0;

        //bullet        
        public var cx:Number = 0;
        public var cy:Number = 1024;
        
        //explosion
        public var px:Number = 0;
        public var py:Number = 0;
        public var pr:Number = 0;
        
        public var tempShape:Shape = new Shape();

        public var tempMat:Matrix = new Matrix();              
        public function onEnter(e:Event):void
        {
            var mx:Number;
            var my:Number;
            
            mx = stage.mouseX;
            my = stage.mouseY;
            
            camx = mx*(1024/450) - 225; 
            camy = my*(1024/450) - 225;
            
            if (camx < 0) { camx = 0; }
            if (camy < 0) { camy = 0; }
            if (camx >= 1024-450) { camx = 1024-450;}
            if (camy >= 1024-450) { camy = 1024-450;}
            
            
            tempMat.identity();
            tempMat.translate(-camx, -camy);
            
            canvas.draw(map, tempMat);
            
              tempShape.graphics.clear();
                tempShape.graphics.beginFill(0, 1);
                tempShape.graphics.drawCircle(cx-camx,cy-camy,8);
                tempShape.graphics.endFill();
            canvas.draw(tempShape);
            
            if (pr > 0)
            {
              tempShape.graphics.clear();
                tempShape.graphics.beginFill(0xFFFF0000, 1);
                tempShape.graphics.drawCircle(px-camx,py-camy,pr);
                tempShape.graphics.endFill();
                canvas.draw(tempShape);
                pr *=0.85;
                if (pr < 4) { pr = -1;}                
            }//endif
            
            
            graphics.clear();
            graphics.beginBitmapFill(canvas);
             graphics.drawRect(0,0,450,450);
            graphics.endFill();
            
            
            
            cy += 16;
            if (cy >= 1024)
            { cy = 0; cx = Math.random()*512+256; }
            
            if (map.getPixel(cx,cy) < 0xFF)
            {
                    px = cx; py = cy; pr = 32+Math.random()*32;
            
                tempShape.graphics.clear();
                tempShape.graphics.beginFill(0x00ffFFff, 1);
                tempShape.graphics.drawCircle(cx,cy,pr);
                tempShape.graphics.endFill();
                map.draw(tempShape);
                
                
                 cy = 0; cx = Math.random()*512+256;                     
            }//endif
            
            
        }//onenter
        
        
    }//classend
}