Vector3f loc = new Vector3f(0, 20, -100);
Vector3f loc = new Vector3f(0, 0, -850);
  protected void initSystem() {    LoggingSystem.getLogger().setLevel(java.util.logging.Level.WARNING);    controlFrame.show();    try {      display = DisplaySystem.getDisplaySystem(properties.getRenderer());      display.createWindow(          properties.getWidth(),          properties.getHeight(),          properties.getDepth(),          properties.getFreq(),          properties.getFullscreen());      cam =          display.getRenderer().getCamera(          properties.getWidth(),          properties.getHeight());    }    catch (JmeException e) {      e.printStackTrace();      System.exit(1);    }    display.getRenderer().setBackgroundColor(new ColorRGBA(0, 0, 0, 1));    cam.setFrustum(1f, 1000F, -0.55f, 0.55f, 0.4125f, -0.4125f);    Vector3f loc = new Vector3f(0, 20, -100);    Vector3f left = new Vector3f(1, 0, 0);    Vector3f up = new Vector3f(0, 1, 0f);    Vector3f dir = new Vector3f(0, 0, 1);    cam.setFrame(loc, left, up, dir);    display.getRenderer().setCamera(cam);    timer = Timer.getTimer(properties.getRenderer());    input = new WidgetMouseTestControllerFirstPerson(this, cam);    input.setMouseSpeed(0.2f);    input.setKeySpeed(1f);    InputSystem.createInputSystem(properties.getRenderer());    display.setTitle("RenParticle System");    display.getRenderer().enableStatistics(true);  }