android 3d 旋转

在javaeye里看到了关于3d旋转的文章，可是博主没有透入什么技术细节。由于一直想做出那种旋转效果，所以就想啊想，终于想出来了(我是个小菜鸟)。呵呵，不管怎样，希望对想做还没做出来的朋友一些帮助。

先上一个效果图：

这是你想要的吗?如果是就继续往下看吧。

其实，这个效果是用animation配合camera做出来的，相信大家在apidemo里面看过类似的。

那么先写一个继承animation的类：Rotate3d

Java代码

1. public class Rotate3d extends Animation {

2. private float mFromDegree;

3. private float mToDegree;

4. private float mCenterX;

5. private float mCenterY;

6. private float mLeft;

7. private float mTop;

8. private Camera mCamera;

9. private static final String TAG = "Rotate3d";

10.

11. public Rotate3d(float fromDegree, float toDegree, float left, float top,

12. float centerX, float centerY) {

13. this.mFromDegree = fromDegree;

14. this.mToDegree = toDegree;

15. this.mLeft = left;

16. this.mTop = top;

17. this.mCenterX = centerX;

18. this.mCenterY = centerY;

19.

20. }

21.

22. @Override

23. public void initialize(int width, int height, int parentWidth,

24. int parentHeight) {

25. super.initialize(width, height, parentWidth, parentHeight);

26. mCamera = new Camera();

27. }

28.

29. @Override

30. protected void applyTransformation(float interpolatedTime, Transformation t) {

31. final float FromDegree = mFromDegree;

32. float degrees = FromDegree + (mToDegree - mFromDegree)

33. * interpolatedTime;

34. final float centerX = mCenterX;