我需要碰撞，使一个对象坐在另一个AndEngine

Question

我有一个游戏，与陀螺仪，我控制几块。现在问题是我已经在我的andengine代码中使用了box2d，但是这些物体似乎并没有对另一个做出反应，导致它们重叠，而不是真正做物理的东西。

在我onCreateScene我有这样的：

@Override 
protected Scene onCreateScene() { 
    this.mMainScene = new Scene(); 
    backgroundSprite = new Sprite(0, 0, this.mBackgroundTextureRegion, getVertexBufferObjectManager()); 

physicsWorld = new PhysicsWorld(new Vector2(0, 0), false); 

final Player oPlayer = new Player(centerX, centerY, this.goodTiledTextureRegion, this.getVertexBufferObjectManager(), MainActivity.this, playerID, 0); 
    player_fix = PhysicsFactory.createFixtureDef(10.0f, 0.2f, 1.0f); 
    body = PhysicsFactory.createBoxBody(physicsWorld, oPlayer, BodyType.DynamicBody, player_fix); 
    oPlayer.setBody(body); 
    playerID++; 
    players.add(oPlayer); 
    for (Player player : players) { 
     player.setPlayers(players); 
     mMainScene.attachChild(player); 
     physicsWorld.registerPhysicsConnector(new PhysicsConnector(player, body, true, false)); 
     mMainScene.registerTouchArea(player); 
    } 

this.mMainScene.registerUpdateHandler(physicsWorld); 
this.mMainScene.registerUpdateHandler(new TimerHandler(0.1f, true, new ITimerCallback() { 
     @Override 
     public void onTimePassed(final TimerHandler pTimerHandler) { 
         Player player = new Player(random, 5, goodTiledTextureRegion, getVertexBufferObjectManager(), MainActivity.this, playerID, 0); 
       body = PhysicsFactory.createBoxBody(physicsWorld, player, BodyType.DynamicBody, player_fix); 
          player.setBody(body); 
          players.add(player); 
mMainScene.detachChildren(); 
        mMainScene.attachChild(backgroundSprite); 
        for (Player player : players) { 
         player.setPlayers(players); 
         mMainScene.attachChild(player); 
         player.body.setLinearVelocity(AccelerometerHelper.TILTX * 5, AccelerometerHelper.TILTY * 5); 
         physicsWorld.registerPhysicsConnector(new PhysicsConnector(player, body, true, false)); 
         mMainScene.registerTouchArea(player); 
        } 
} 

return this.mMainScene; 

} 

现在，我创建了现场，我创建了物理世界。 然后我创建我的第一个“玩家”，（这是一个精灵，我移动）。我为它创建了一个body，并且在我的Player.class（entity）中设置了这个body。从其实体访问每个玩家身体。然后在每一次更新中（代码稍微长一点，但是我拿出了与物理学没有关系的东西），我创建了一个新玩家。然后对于我的数组列表中的每个玩家（玩家），我在加速度计之后设置线速度，以使其移动。问题是，如果一个玩家击中另一个玩家，它们会重叠，并且不会对此产生反应。

玩家夹具到处都是一样的player_fix = PhysicsFactory.createFixtureDef(10.0f, 0.2f, 1.0f); BodyType总是DynamicBody。有人能告诉我我缺少什么吗？

Answer 1

您可以从http://code.google.com/p/andenginephysicsbox2dextension/下载。

我使用Eclipse，并将其添加为项目。然后我将其纳入我的项目。 我也推荐项目AndEngineExamples，它向你展示各种漂亮的工具。

下面是我添加墙：

final Rectangle wall = new Rectangle(pX, pY, pWidth, pHeight, pVman); // pvman is the ObjectVertexBufferManager 
wall.setIgnoreUpdate(true); 


Body body = PhysicsFactory.createBoxBody(
    pParent.mPhysicsWorld, 
    wall, 
    BodyType.StaticBody, 
    Environment.WALL_FIXTURE_DEF 
); 
    pScene.getFirstChild().attachChild(wall); 
    pParent.mPhysicsWorld.registerPhysicsConnector(new PhysicsConnector(wall, body, true, true)); 
    // pParent is of type GameActivity. 

的WALL_FIXTURE_DEF是：

 /* The categories. */ 
public static final short CATEGORYBIT_WALL = 1; 
public static final short CATEGORYBIT_MONNING = 2; 
public static final short CATEGORYBIT_WHEEL = 4; 

/* And what should collide with what. */ 
public static final short MASKBITS_WALL = CATEGORYBIT_WALL + CATEGORYBIT_MONNING + CATEGORYBIT_WHEEL; 
public static final short MASKBITS_MONNING = CATEGORYBIT_WALL; 
public static final short MASKBITS_WHEEL = CATEGORYBIT_WALL; 

public static final FixtureDef WALL_FIXTURE_DEF = PhysicsFactory.createFixtureDef(0, 0f, 0.9f, false, CATEGORYBIT_WALL, MASKBITS_WALL, (short)0); 
public static final FixtureDef MONNING_FIXTURE_DEF = PhysicsFactory.createFixtureDef(10, 0f, 0f, false, CATEGORYBIT_MONNING, MASKBITS_MONNING, (short)0); 
public static final FixtureDef WHEEL_FIXTURE_DEF = PhysicsFactory.createFixtureDef(20, 0f, 10f, false, CATEGORYBIT_WHEEL, MASKBITS_WHEEL, (short)0); 
public static final float GRAVITY_MONNINGS = 2*SensorManager.GRAVITY_EARTH; 

这也处理使用MASK_BITS碰撞。 Monnings和Wheels不应该相互碰撞，但它们应该与Walls碰撞。

的物理世界，因为这在createScene函数创建：

this.mPhysicsWorld = new FixedStepPhysicsWorld(Environment.FPS, new Vector2(0, Environment.GRAVITY_MONNINGS), false); 

再次AndEngineExamples项目（http://code.google.com/p/andengineexamples/）是安装必须的。

这可能是您需要的代码。请注意，我还没有运行该代码，所以它可能包含的错误，但我希望你能明白我的意思：（对不起，缩进）

@Override 
protected Scene onCreateScene() { 
    this.mMainScene = new Scene(); 
    backgroundSprite = new Sprite(0, 0, this.mBackgroundTextureRegion, getVertexBufferObjectManager()); 

    physicsWorld = new PhysicsWorld(new Vector2(0, 0), false); 

    final Player oPlayer = new Player(centerX, centerY, this.goodTiledTextureRegion, this.getVertexBufferObjectManager(), MainActivity.this, playerID, 0); 
    player_fix = PhysicsFactory.createFixtureDef(10.0f, 0.2f, 1.0f); 

    oPlayer.setBody(body); 
    playerID++; 
    players.add(oPlayer); 
    for (Player player : players) { 

     Body body = PhysicsFactory.createBoxBody(physicsWorld, oPlayer, BodyType.DynamicBody, player_fix); 
     player.setPlayers(players); 
     mMainScene.attachChild(player); 
     physicsWorld.registerPhysicsConnector(new PhysicsConnector(player, body, true, false)); 
     mMainScene.registerTouchArea(player); 
} 

this.mMainScene.registerUpdateHandler(physicsWorld); 
this.mMainScene.registerUpdateHandler(new TimerHandler(0.1f, true, new ITimerCallback() { 
    @Override 
    public void onTimePassed(final TimerHandler pTimerHandler) { 
      Player player = new Player(random, 5, goodTiledTextureRegion, getVertexBufferObjectManager(), MainActivity.this, playerID, 0); 
      Body body = PhysicsFactory.createBoxBody(physicsWorld, player, BodyType.DynamicBody, player_fix); 
      player.setBody(body); 
      players.add(player); 
      player.setPlayers(players); 
      mMainScene.attachChild(player); 

      /* This might have to be in the loop */ 
      player.body.setLinearVelocity(AccelerometerHelper.TILTX * 5, AccelerometerHelper.TILTY * 5); 
      physicsWorld.registerPhysicsConnector(new PhysicsConnector(player, body, true, false)); 
      mMainScene.registerTouchArea(player); 
     } 
    } 

return this.mMainScene; 

}