Right now I`m working with sets of hemispheres instead of full spheres to save processing time. What I`

ve got to do is rotate these hemispheres so that from my viewpoint I can`t distinguish a full sphere from a hemisphere, since I´m looking “on top” of that hemisphere. My problem is, that I don´t know how to calculate the correct angles and the order of rotattion axis. I´m pretty sure I´ve got to transform the modelview matrix but I don´t know how.

Thanks for helping & excuse my bad english.

Jan Deiterding