Alright, I have the following info for my collision detection routine: -normals for every face (faces are both quads a triangles) -starting point -destination point -bounding sphere radius ok, how can I tell if moveing to the destination point from the starting point would intersect with the plane of the face whether it be a quad or a tri? thanks, Joe JoeMont001@programmer.net www.polarisoft.n3.net Edited by - Julio on 12/22/00 2:31:04 PM

http://www.fluidstudios.com/publications.html

Read the article on collision detecting. It should answer all of your questions in detail