问题来实现曲线动画 [英] Problem to achieve curved animation
问题描述
可能重复：
的Android，移动位图沿路径？
我想通过一个弧形path.Is有可能在Android的移动图像？我搜索了很多，但我只能找到有关缩放，旋转和平移animation.So人有任何想法，请help.Is有可能在Android的？
I want to move an image through a curved path.Is it possible in android ? I searched a lot but i can only find about scale,rotate and translate animation.So anyone have any idea please help.Is it possible in android?
推荐答案
您可以做一个逐帧动画。您可以一步定位对象的步骤来创建曲线。这将是有限的重用，但你可以做到这一点。
You can do a Frame by Frame animation. You can position the object step by step to create a curve. That will be of limited reuse, but you can do it.
也可以编写自己的动画创造TweenAnimation的一个子类，可以沿曲线制作动画。如果你用好数学，能理解贝塞尔曲线，那么这可能是一个简单的选择。一旦你有一个类，你可以很容易地通过任何曲线路径动画，但它更多的工作。
Or you can write your own animation to create a subclass of TweenAnimation that can animate along a curve. If you're good with math and can understand bezier curves then that might be a straight forward option. Once you have that class you could easily animate across any curved path, but it's more work.
http://en.wikipedia.org/wiki/B%C3%A9zier_curve
下面是一些VB code：
Here's some VB code:
HTTP：//www.$c$ctoad.com/vb_bezier.asp
下面是一些Java code：
Here's some Java code:
http://www.math.ubc.ca/~cass/ GFX / bezier.html
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