side9/anim/Flip3dAnimation.java

package dk.thoerup.side9.anim;

import android.graphics.Camera;
import android.graphics.Matrix;
import android.view.animation.Animation;
import android.view.animation.Transformation;

public class Flip3dAnimation  extends Animation {
        private final float mFromDegrees;
        private final float mToDegrees;
        private final float mCenterX;
        private final float mCenterY;
        private Camera mCamera;

        public Flip3dAnimation(float fromDegrees, float toDegrees, float centerX, float centerY) {
                mFromDegrees = fromDegrees;
                mToDegrees = toDegrees;
                mCenterX = centerX;
                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 fromDegrees = mFromDegrees;
                float degrees = fromDegrees + ((mToDegrees - fromDegrees) * interpolatedTime);

                final float centerX = mCenterX;
                final float centerY = mCenterY;
                final Camera camera = mCamera;

                final Matrix matrix = t.getMatrix();

                camera.save();

                camera.rotateY(degrees);

                camera.getMatrix(matrix);
                camera.restore();

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

        }

}
1	package dk.thoerup.side9.anim;
2
3	import android.graphics.Camera;
4	import android.graphics.Matrix;
5	import android.view.animation.Animation;
6	import android.view.animation.Transformation;
7
8	public class Flip3dAnimation extends Animation {
9	private final float mFromDegrees;
10	private final float mToDegrees;
11	private final float mCenterX;
12	private final float mCenterY;
13	private Camera mCamera;
14
15	public Flip3dAnimation(float fromDegrees, float toDegrees, float centerX, float centerY) {
16	mFromDegrees = fromDegrees;
17	mToDegrees = toDegrees;
18	mCenterX = centerX;
19	mCenterY = centerY;
20	}
21
22	@Override
23	public void initialize(int width, int height, int parentWidth, int parentHeight) {
24	super.initialize(width, height, parentWidth, parentHeight);
25	mCamera = new Camera();
26	}
27
28	@Override
29	protected void applyTransformation(float interpolatedTime, Transformation t) {
30	final float fromDegrees = mFromDegrees;
31	float degrees = fromDegrees + ((mToDegrees - fromDegrees) * interpolatedTime);
32
33	final float centerX = mCenterX;
34	final float centerY = mCenterY;
35	final Camera camera = mCamera;
36
37	final Matrix matrix = t.getMatrix();
38
39	camera.save();
40
41	camera.rotateY(degrees);
42
43	camera.getMatrix(matrix);
44	camera.restore();
45
46	matrix.preTranslate(-centerX, -centerY);
47	matrix.postTranslate(centerX, centerY);
48
49	}
50
51	}