android 3d 旋转

核心提示：35. final float centerY = mCenterY;36. final Matrix matrix = t.getMatrix();37.38. if (degrees < = -76.0f) {39. degrees = -90.0f;40. mCamera.save();41. mCamer

35. final float centerY = mCenterY;

36. final Matrix matrix = t.getMatrix();

37.

38. if (degrees < = -76.0f) {

39. degrees = -90.0f;

40. mCamera.save();

41. mCamera.rotateY(degrees);

42. mCamera.getMatrix(matrix);

43. mCamera.restore();

44. } else if(degrees >=76.0f){

45. degrees = 90.0f;

46. mCamera.save();

47. mCamera.rotateY(degrees);

48. mCamera.getMatrix(matrix);

49. mCamera.restore();

50. }else{

51. mCamera.save();

52. //这里很重要哦。

53. mCamera.translate(0, 0, centerX);

54. mCamera.rotateY(degrees);

55. mCamera.translate(0, 0, -centerX);

56. mCamera.getMatrix(matrix);

57. mCamera.restore();

58. }

59.

60. matrix.preTranslate(-centerX, -centerY);

61. matrix.postTranslate(centerX, centerY);

62. }

63. }

public class Rotate3d extends Animation {

private float mFromDegree;

private float mToDegree;

private float mCenterX;

private float mCenterY;

private float mLeft;

private float mTop;

private Camera mCamera;

private static final String TAG = "Rotate3d";

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

float centerX, float centerY) {

this.mFromDegree = fromDegree;

this.mToDegree = toDegree;

this.mLeft = left;

this.mTop = top;

this.mCenterX = centerX;

this.mCenterY = centerY;

}

@Override

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

int parentHeight) {

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

mCamera = new Camera();