peterpuppy ```
public function update(delta:Number):Boolean {
cur_time += delta;
var distance_percent:Number = (cur_time / play_time) * (1 - Math.log(cur_time / play_time));
ani.x = startX + (endX - startX) * distance_percent
ani.y = startY + (endY - startY) * distance_percent
var speed:Number = -Math.log(cur_time / play_time)
ani.interval = (35 / speed) > 60 ? 60 : (35 / speed);
ani.alpha = speed
if ((cur_time / play_time) > 1) {
return true;
} else {
return false;
}
}
```
这里的update函数，delta是每一帧的时间，我去动态的改变ani的interval。这样做在1.7.6里面是没问题的。
