@Override
  protected void onUpdate(float deltaTime) {
    _time += deltaTime;

    float x = (float) (8 * Math.cos(_time));
    float y = (float) (8 * Math.sin(_time));
    float z = (float) (8 * Math.cos(_time * 0.7f));
    _currentCamera.setPosition(x, z, y);
    _currentCamera.setDirection(-x, -z, -y);
  }