public void setPositioningMode(VRGUIPositioningMode mode) {
        posMode = mode;
    }
Set the GUI {@link VRGUIPositioningMode positioning mode}.
@param mode the GUI {@link VRGUIPositioningMode positioning mode}.
@see #getPositioningMode()
jme3-vr/src/main/java/com/jme3/util/VRGuiManager.java