Question

我在屏幕上从Box2D绘制bodys时遇到问题。

你可以看到Box2DDebugRenderer在屏幕上绘制了所有旧位置，我该如何避免呢？

忽略render（）中除最后一行之外的所有行。

public class GameRenderer {

SpriteBatch batcher;
private GameWorld myWorld;
private OrthographicCamera cam;
private Box2DDebugRenderer renderer;
public Array<Body> bodies = new Array<Body>();

public GameRenderer(GameWorld myWorld){
    cam = new OrthographicCamera();
    cam.setToOrtho(true, 320.0f, 200.0f);
    batcher = new SpriteBatch();
    batcher.setProjectionMatrix(cam.combined);
    renderer = new Box2DDebugRenderer();
    this.myWorld = myWorld;

}

public void render(){
    batcher.begin();
    bodies = myWorld.getBodies();
    if(bodies != null){
        //Entity e = (Entity) bodies.get(0).getUserData();
        //batcher.draw(e.getImage(), bodies.get(0).getPosition().x, bodies.get(0).getPosition().y, 10, 10);
    }
    batcher.end();
    renderer.render(myWorld.world, cam.combined);
}

}

Answer 1

只需设置所需的清晰颜色，然后使用所需的缓冲区调用glClear（）以清除。然后，您可以使用新的场景图形自由渲染新帧。

@Override
public void render() {

  Gdx.gl.glClearColor( 1, 0, 0, 1 );
  Gdx.gl.glClear( GL20.GL_COLOR_BUFFER_BIT | GL20.GL_DEPTH_BUFFER_BIT );

  // scene render code...
}

LibGDX Box2D绘图问题

1 个答案: