/**
  * Update the core input system - mouse, keyboard and joystick. Thus all events are handled within
  * this method call.<br>
  * To disable joystick support call {@link JoystickInput#setProvider(String)} with {@link
  * #INPUT_SYSTEM_DUMMY} as parameter proir to creating the display.
  *
  * @see KeyInput#update()
  * @see MouseInput#update()
  * @see JoystickInput#update()
  */
 public static void update() {
   MouseInput.get().update();
   KeyInput.get().update();
   JoystickInput.get().update();
 }
 public void performAction(InputActionEvent evt) {
   localTranslation.x = MouseInput.get().getXDelta() * _speed;
   localTranslation.y = MouseInput.get().getYDelta() * _speed;
   worldTranslation.set(localTranslation);
   hotSpotLocation.set(localTranslation).addLocal(hotSpotOffset);
 }