Hi there, I''m writing this leveleditor for the 3d engine my team is developing. I want to implement union/intersect routines so I can create complex 3d objects within the editor itself instead of using 3d studio or something like that. Why? Because I''m a freak! :-) Anyway, does anybody have some usefull info or websites about union/intersect routines? Later! Jayce

there is a lot of theory and stuff around the net for solid modelling, basically you need boolean operations on solids
which may be not quite easy to perform , anyway take a look
at cgal library , just to make it short you need a lot of functions like checking for inclusion of a point surrounded by planes or hyper-planes, accurate line intersection and polygon clipping functions, most of this algorithm uses a binary space partition method to perform such boolean operations, too long to explain here though ,you should look also at bsp theory .
byez