topical media & game development
[] readme course(s) preface I 1 2 II 3 4 III 5 6 7 IV 8 9 10 V 11 12 afterthought(s) appendix reference(s) example(s) resource(s) _

talk show tell print

animation-ch03-Oval.ax

animation-ch03-Oval.ax [swf] [flash] flex 


  package
  {
   import flash.display.Sprite;
   import flash.events.Event;
   
   public class @ax-animation-ch03-Oval extends Sprite {
    private var ball:animation_ch03_Ball;
    private var angle:Number = 0;
    private var centerX:Number = 200;
    private var centerY:Number = 200;
    private var radiusX:Number = 200;
    private var radiusY:Number = 100;
    private var speed:Number = .1;
    
    public function @ax-animation-ch03-Oval() {
     init();
    }

init(s)


    private function init():void {
     ball = new animation_ch03_Ball();
     addChild(ball);
     ball.x = 0;
     addEventListener(Event.ENTER_FRAME, onEnterFrame);
    }

frame(s)


    public function onEnterFrame(event:Event):void {
    // the book seems to make a mistake here
     // ball.x = centerX + Math.sin(angle) * radiusX;
     // ball.y = centerY + Math.cos(angle) * radiusY;
     ball.x = centerX + Math.cos(angle) * radiusX;
     ball.y = centerY + Math.sin(angle) * radiusY;
     angle += speed;
    }
   }
  }
[] readme course(s) preface I 1 2 II 3 4 III 5 6 7 IV 8 9 10 V 11 12 afterthought(s) appendix reference(s) example(s) resource(s) _

(C) Æliens 04/09/2009

You may not copy or print any of this material without explicit permission of the author or the publisher. In case of other copyright issues, contact the author.