[JAVA3D] navigation bahaviour

[richie]

HI all! i am asking this question again, so if anybody can answer it for me, it would save a lot of time and energy on my side. thankx so much in advance the question is:   I am using the KeyNavigation behaviour, but want it to be restricted after some coordinates in the Z axis so that one doesnt go too far..does the boundingsphere play the same role ? i tried changing the bounds for the behaviour but doesnt help..Is it possible to do so by defining the border coordinates ? how ??   Richie