Mouse Rotating a node

HI guys!



I try to rotate my spaceship model with the mouse. I added a MouseInputListener to my code like this:



       mouse = new RelativeMouse("The Mouse");

        mouseHandler = new InputHandler();
        mouse.registerWithInputHandler(mouseHandler);
        MouseInput.get().addListener(new MouseInputListener() {
         public void onButton(int button, boolean pressed, int x, int y) {
            System.out.println("Clicked " + button);
         }

         public void onMove(int xDelta, int yDelta, int newX, int newY) {
            if(xDelta < 0) {
               System.out.println("Moving left");
            } else if(xDelta >= 0) {
               System.out.println("Moving right");
            }
            
            if(yDelta < 0) {
               System.out.println("Moving down");
            } else if(yDelta >= 0) {
               System.out.println("Moving up");
            }
         }

         public void onWheel(int wheelDelta, int x, int y) {
            System.out.println("Wheeled (" + wheelDelta + "," + x + "," + y + ")");
         }});
    }



Now I don't know how to add the rotation to the current local rotation. Let's say I have a simple box as a player node and I want to rotate it. How do I add the new rotation to the current? Something like


player.getLocalRotation().addLocal(new Quaternion(xDelta, 0, 0, 0));



doesn't work. Can someone please post the correct solution to this? I bet this questions came up 10245296 times before... :(