[img]http://dl2.iteye.com/upload/attachment/0098/2613/30e0f8fd-f66d-33d9-a36b-316270bdb496.png[/img]
正常的情况是第一种，0-100 往 x轴正方向走动，有没有方法实现 0 到 -100 往负方向走动
看不到代码。把起点参数和终点参数对换下，然后把增长值变成负的试试
![http://dl2.iteye.com/upload/attachment/0098/2613/30e0f8fd-f66d-33d9-a36b-316270bdb496.png[/img]](http://dl2.iteye.com/upload/attachment/0098/2613/30e0f8fd-f66d-33d9-a36b-316270bdb496.png%5B/img%5D){kind=link}