AndEngine之Rotation3DExample

最新推荐文章于 2020-10-03 09:53:43 发布

原创最新推荐文章于 2020-10-03 09:53:43 发布 · 907 阅读

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本文介绍了一个使用自定义纹理和3D旋转效果的精灵显示示例。该示例通过禁用背面剔除来展示精灵的3D旋转，并在场景中实现循环旋转动画。

public class Rotation3DExample extends BaseExample {
// ===========================================================
// Constants
// ===========================================================

private static final int CAMERA_WIDTH = 720;
private static final int CAMERA_HEIGHT = 480;

// ===========================================================
// Fields
// ===========================================================

private Camera mCamera;
private Texture mTexture;
private TextureRegion mFaceTextureRegion;

// ===========================================================
// Constructors
// ===========================================================

// ===========================================================
// Getter & Setter
// ===========================================================

// ===========================================================
// Methods for/from SuperClass/Interfaces
// ===========================================================

@Override
public Engine onLoadEngine() {
  this.mCamera = new Camera(0, 0, CAMERA_WIDTH, CAMERA_HEIGHT);
  this.mCamera.setZClippingPlanes(-100, 100);
  return new Engine(new EngineOptions(true, ScreenOrientation.LANDSCAPE, new RatioResolutionPolicy(CAMERA_WIDTH, CAMERA_HEIGHT), this.mCamera));
}

@Override
public void onLoadResources() {
this.mTexture = new Texture(32, 32, TextureOptions.BILINEAR_PREMULTIPLYALPHA);
this.mFaceTextureRegion = TextureRegionFactory.createFromAsset(this.mTexture, this, "gfx/face_box.png", 0, 0);

this.mEngine.getTextureManager().loadTexture(this.mTexture);
}

@Override
public Scene onLoadScene() {
this.mEngine.registerUpdateHandler(new FPSLogger());

final Scene scene = new Scene(1);
scene.setBackground(new ColorBackground(0.09804f, 0.6274f, 0.8784f));

  /* Calculate the coordinates for the face, so its centered on the camera. */
  final int centerX = (CAMERA_WIDTH - this.mFaceTextureRegion.getWidth()) / 2;
  final int centerY = (CAMERA_HEIGHT - this.mFaceTextureRegion.getHeight()) / 2;

  /* Create the face and add it to the scene. */
  final Sprite face = new Sprite(centerX, centerY, this.mFaceTextureRegion) {
   @Override
   protected void applyRotation(final GL10 pGL) {
    /* Disable culling so we can see the backside of this sprite. */
    GLHelper.disableCulling(pGL);//背面检测

    final float rotation = this.mRotation;

    if(rotation != 0) {
     final float rotationCenterX = this.mRotationCenterX;
     final float rotationCenterY = this.mRotationCenterY;
     //pGL.glTranslatef(rotationCenterX, rotationCenterY, 0)跟pGL.glTranslatef(rotationCenterX, rotationCenterY, 0);绕过中心点的竖直方向翻转
     pGL.glTranslatef(rotationCenterX, rotationCenterY, 0);
     /* Note we are applying rotation around the y-axis and not the z-axis anymore! */
     pGL.glRotatef(rotation, 0, 1, 0);//延Y轴转
     pGL.glTranslatef(rotationCenterX, rotationCenterY, 0);
    }
   }

   @Override
   protected void drawVertices(final GL10 pGL, final Camera pCamera) {
    super.drawVertices(pGL, pCamera);

    /* Enable culling as 'normal' entities profit from culling. */
    GLHelper.enableCulling(pGL);
   }
  };
  face.addShapeModifier(new LoopShapeModifier(new RotationModifier(6, 0, 360)));//duration 是设置的动画执行时间
  scene.getTopLayer().addEntity(face);

return scene;
}

@Override
public void onLoadComplete() {

}

// ===========================================================
// Methods
// ===========================================================

// ===========================================================
// Inner and Anonymous Classes
// ===========================================================
}