android 实现3d旋转
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2022-07-15 12:45:45
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通过继承Animation动画类 封装了一个3d旋转的效果代码如下
import android.graphics.Camera; import android.graphics.Matrix; import android.view.animation.Animation; import android.view.animation.Transformation; public class Rotatw3d 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 Rotatw3d(float mFromDegree, float mToDegree, float mCenterX, float mcenterY, float mleft, float mTop) { this.mFromDegree = mFromDegree; this.mToDegree = mToDegree; this.mCenterX = mCenterX; this.mcenterY = mcenterY; this.mleft = mleft; this.mTop = mTop; } @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, -centerX); matrix.postTranslate(centerX, centerX); } }
简单的调用
Rotatw3d leftaction=new Rotatw3d(-0, -90, -100, -100, -100, -100); leftaction.setFillAfter(true); leftaction.setDuration(5000); ImageView image=(ImageView)findViewById(R.id.image); image.startAnimation(leftaction);
3d的旋转效果是出来了,至于如何精致,你可*发挥。
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