TestRenParticleGUI.manager.getGravityForce().z = (float)val * 0.05f;
TestRenParticleGUI.manager.getGravityForce().z = (float)val * 0.001f;
      public void stateChanged(ChangeEvent e) {        int val = gravZSlider.getValue();        if (TestRenParticleGUI.manager != null)          TestRenParticleGUI.manager.getGravityForce().z = (float)val * 0.05f;      }