putting a 2D box around an object?

perturbatio: oh, how cool :D and it's decently fast, too. works fine even with a 32-segment sphere, which is something like 4000 polys.

jfk: that's a very slick idea. calculating from 8 points rather than all vertices in the mesh.. that sounds like the winner.

noel: cool as well, pretty similar to the code perturbatio posted. :D