flashpunk LinearMotion usage

幾個地方要注意
// auto remove when it has finished
var myTween = new LinearMotion(null, Tween.ONESHOT);

// auto stop and run myComplete when is has finished
var myTween = new LinearMotion(myComplete);

myTween.setMotion(to_x, 340, to_x, 300, 0.5, Ease.quadOut);

// don't start immediately
addTween(myTween, false);

you can check myTween.active in update().
完整範例如下：