flash on 2012-9-13

/**
 * Copyright mutantleg ( http://wonderfl.net/user/mutantleg )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/tZu4t
 */

package {
    import flash.ui.Keyboard;
    import flash.events.Event;
    import flash.events.KeyboardEvent;
    import flash.display.Graphics;
    import flash.display.Sprite;
    public class FlashTest extends Sprite {

        public var car:Sprite;

        public function FlashTest() {
            // write as3 code here..
            
            var g:Graphics;
            car = new Sprite();
            g = car.graphics;
            g.clear();
            g.lineStyle(2,0);
            g.beginFill(0x0000FF,1);
            g.drawRect(-16,-8,32,16);
            g.endFill();
            addChild(car);
            car.x = 200;
            car.y = 200;
            
            graphics.clear();
            graphics.lineStyle(2,0);
            graphics.drawRect(50,50,200,200);
            
            stage.addEventListener(KeyboardEvent.KEY_DOWN, kdown);
            stage.addEventListener(KeyboardEvent.KEY_UP, kup);
            stage.addEventListener(Event.ENTER_FRAME, onEnter);
        }//ctor
        
        public var vecKey:Vector.<Boolean> = new Vector.<Boolean>(1024,false);
        
        public function kup(e:KeyboardEvent):void
        {
            vecKey[e.keyCode] = false;
            }
        
        public function kdown(e:KeyboardEvent):void
        {
             vecKey[e.keyCode] = true;   
            }
            
            public var vx:Number = 0;
            public var vy:Number = 0;
            public var a:Number = 0;
        
        public function onEnter(e:Event):void
        {
            if (vecKey[Keyboard.LEFT]) { a-= 0.04;}
            if (vecKey[Keyboard.RIGHT]) { a+=0.04;}
            
            if (vecKey[ Keyboard.UP])
            {
             vx += Math.cos(a) * 0.17;
             vy += Math.sin(a) * 0.17;   
            }
            
            if (vecKey[Keyboard.DOWN])
            {
             vx -= Math.cos(a) * 0.17;
             vy -= Math.sin(a) * 0.17;
            }
            
            vx *= 0.983;
            vy *= 0.983;
                
              car.x += vx;
              car.y += vy;
              car.rotation = a * 180/3.1415;  
            
            if (car.x < 50)
            { car.x = 50; if (vx < 0) { vx *=-0.5;}}
            if (car.x >= 250)
            { car.x = 250; if (vx>0) { vx *= -0.5;}}
            if (car.y < 50)
            { car.y = 50; if (vy<0) { vy *= -0.5;}}
            if (car.y >= 250)
            { car.y = 250; if (vy > 0) { vy *= -0.5;}}
            
         }//onenter
        
        
    }//classend
}