manager.updateParticles();
  protected void update(float interpolation) {    if (quit) {      finished = true;      return;    }    if (noUpdate) return;    timer.update();    tpf = timer.getTimePerFrame();    if (tpf > 1f) tpf = 1.0f; // do this to prevent a long pause at start    frame.handleInput(tpf*10f);    manager.updateParticles();    fps.print("FPS: " + (int) timer.getFrameRate() + " - " +              display.getRenderer().getStatistics());    main.updateGeometricState(tpf, true);  }