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-ch08-Chain.ax

animation-ch08-Chain.ax [swf] [flash] flex 


  package
  {
   import flash.display.Sprite;
   import flash.events.Event;
   
   public class @ax-animation-ch08-Chain extends Sprite
   {
    private var ball0:animation_ch08_Ball;
    private var ball1:animation_ch08_Ball;
    private var ball2:animation_ch08_Ball;
    private var spring:Number = 0.1;
    private var friction:Number = 0.8;
    private var gravity:Number = 5;
    
    public function @ax-animation-ch08-Chain()
    {
     init();
    }

init(s) 


    private function init():void
    {
     ball0 = new animation_ch08_Ball(20);
     addChild(ball0);
     ball1 = new animation_ch08_Ball(20);
     addChild(ball1);
     ball2 = new animation_ch08_Ball(20);
     addChild(ball2);
     addEventListener(Event.ENTER_FRAME, onEnterFrame);
    }

frame(s)


    
    private function onEnterFrame(event:Event):void
    {
     moveBall(ball0, mouseX, mouseY);
     moveBall(ball1, ball0.x, ball0.y);
     moveBall(ball2, ball1.x, ball1.y);
     
     graphics.clear();
     graphics.lineStyle(1);
     graphics.moveTo(mouseX, mouseY);
     graphics.lineTo(ball0.x, ball0.y);
     graphics.lineTo(ball1.x, ball1.y);
     graphics.lineTo(ball2.x, ball2.y);
    }

move(s) 


    private function moveBall(ball:animation_ch08_Ball, targetX:Number, targetY:Number):void
    {
     ball.vx += (targetX - ball.x) * spring;
     ball.vy += (targetY - ball.y) * spring;
     ball.vy += gravity;
     ball.vx *= friction;
     ball.vy *= friction;
     ball.x += ball.vx;
     ball.y += ball.vy;
    }
   }
  }
[] 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.