Rotate3DAnimation.java

package com.duguang.baseanimation.ui.anim;

import android.graphics.Camera;
import android.graphics.Matrix;
import android.view.animation.Animation;
import android.view.animation.Transformation;
/**
 * 
 * Copyright (c) 2012 All rights reserved
 * 名称：AbRotate3dAnimation2.java 
 * 描述：TODO
 * @author 原作者  QQ：250333410
 * @date：2013-12-11 上午11:36:37
 * @version v1.0
 */
public class Rotate3DAnimation 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 Rotate3DAnimation(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();
	}

	@Override
	protected void applyTransformation(float interpolatedTime, Transformation t) {
		final float FromDegree = mFromDegree;
		float degrees = FromDegree + (mToDegree - mFromDegree)
				* interpolatedTime;
		final float centerX = mCenterX;
		final float centerY = mCenterY;
		final Matrix matrix = t.getMatrix();

		if (degrees <= -76.0f) {
			degrees = -90.0f;
			mCamera.save();
			mCamera.rotateY(degrees);
			mCamera.getMatrix(matrix);
			mCamera.restore();
		} else if (degrees >= 76.0f) {
			degrees = 90.0f;
			mCamera.save();
			mCamera.rotateY(degrees);
			mCamera.getMatrix(matrix);
			mCamera.restore();
		} else {
			mCamera.save();
			mCamera.translate(0, 0, centerX);
			mCamera.rotateY(degrees);
			mCamera.translate(0, 0, -centerX);
			mCamera.getMatrix(matrix);
			mCamera.restore();
		}

		matrix.preTranslate(-centerX, -centerY);
		matrix.postTranslate(centerX, centerY);
	}

}