protected void rotateCamera(float value) {
        if (!canRotate || !enabled) {
            return;
        }
        rotating = true;
        targetRotation += value * rotationSpeed;


    }
Sets custom triggers for zooming out the cam
default is
new MouseAxisTrigger(MouseInput.AXIS_WHEEL, false)  mouse wheel down

@param triggers the triggers to assign
jme3-core/src/main/java/com/jme3/input/ChaseCamera.java