pathModifier



public class PathModifierExample extends SimpleBaseGameActivity {
 // ===========================================================
 // Constants
 // ===========================================================

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

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

 private RepeatingSpriteBackground mGrassBackground;

 private BitmapTextureAtlas mBitmapTextureAtlas;
 private TiledTextureRegion mPlayerTextureRegion;

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

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

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

 @Override
 public EngineOptions onCreateEngineOptions() {
  Toast.makeText(this, "You move my sprite right round, right round...",
    Toast.LENGTH_LONG).show();

  final Camera camera = new Camera(0, 0, CAMERA_WIDTH, CAMERA_HEIGHT);

  return new EngineOptions(true, ScreenOrientation.LANDSCAPE_FIXED,
    new RatioResolutionPolicy(CAMERA_WIDTH, CAMERA_HEIGHT), camera);
 }

 @Override
 public void onCreateResources() {
  BitmapTextureAtlasTextureRegionFactory.setAssetBasePath("gfx/");
  // 實例化可重複的精靈背景
  this.mGrassBackground = new RepeatingSpriteBackground(CAMERA_WIDTH,
    CAMERA_HEIGHT, this.getTextureManager(),
    AssetBitmapTextureAtlasSource.create(this.getAssets(),
      "gfx/background_grass.png"),
    this.getVertexBufferObjectManager());
  // 創建紋理集
  this.mBitmapTextureAtlas = new BitmapTextureAtlas(
    this.getTextureManager(), 128, 128);
  // 創建紋理區域
  this.mPlayerTextureRegion = BitmapTextureAtlasTextureRegionFactory
    .createTiledFromAsset(this.mBitmapTextureAtlas, this,
      "player.png", 0, 0, 3, 4);
  this.mBitmapTextureAtlas.load();
 }

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

  final Scene scene = new Scene();
  scene.setBackground(this.mGrassBackground);

  /* Create the face and add it to the scene. */
  final AnimatedSprite player = new AnimatedSprite(10, 10, 48, 64,
    this.mPlayerTextureRegion, this.getVertexBufferObjectManager());
  // 指定其行走的路線
  final Path path = new Path(5).to(10, 10).to(10, CAMERA_HEIGHT - 74)
    .to(CAMERA_WIDTH - 58, CAMERA_HEIGHT - 74)
    .to(CAMERA_WIDTH - 58, 10).to(10, 10);

  /* Add the proper animation when a waypoint of the path is passed. */
  player.registerEntityModifier(
  // 循環實體修飾集合
  new LoopEntityModifier(
  // 構造路線修飾實體
    new PathModifier(30, path, null, new IPathModifierListener() {
     @Override
     public void onPathStarted(final PathModifier pPathModifier,
       final IEntity pEntity) {
      Debug.d("onPathStarted");
     }

     @Override
     public void onPathWaypointStarted(
       final PathModifier pPathModifier,
       final IEntity pEntity, final int pWaypointIndex) {
      Debug.d("onPathWaypointStarted:  " + pWaypointIndex);
      switch (pWaypointIndex) {
      // 人物向下走的時候，使用第6到第8張圖
      case 0:
       player.animate(new long[] { 200, 200, 200 }, 6, 8,
         true);
       break;
      // 人物像向走的時候，使用第3到第5張圖
      case 1:
       player.animate(new long[] { 200, 200, 200 }, 3, 5,
         true);
       break;
      // 人物向上走的時候，使用第0到2張圖
      case 2:
       player.animate(new long[] { 200, 200, 200 }, 0, 2,
         true);
       break;
      // 人物向左走的號死後，使用第9到11張圖
      case 3:
       player.animate(new long[] { 200, 200, 200 }, 9, 11,
         true);
       break;
      }
     }

     @Override
     public void onPathWaypointFinished(
       final PathModifier pPathModifier,
       final IEntity pEntity, final int pWaypointIndex) {
      Debug.d("onPathWaypointFinished: " + pWaypointIndex);
     }

     @Override
     public void onPathFinished(
       final PathModifier pPathModifier,
       final IEntity pEntity) {
      Debug.d("onPathFinished");
     }
    }, EaseSineInOut.getInstance())));
  scene.attachChild(player);

  return scene;
 }

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

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