Check this link for a hefty preview from the maths section of Andre Lamothe''s new book, yet to be published!!!!! http://www.xgames3d.com/ubb/Forum9/HTML/000177.html It contains stuff about Intersections and Quaternions!!! Well worth a look. Sorry if this is old news but I am only new in this part of town.

Would anyone out there happen to have a PDF of Lamothe''s Voxel article that he did for Game Developer mageazine.