Hellow, can someone help me? I use SWIFT++ 1.1 to execute collision detection in my scene. I use 3ds objects, but I have to decompose them first. I've read the paper of the swift distribution. http://www.cs.unc.edu/~geom/SWIFT++/EhmannLinEG01.pdf It says that Swift is using the Qhull library. I don't find any useful information about it. I use the swiftpp lib and the swiftdecomp lib. I think I have to invoke a couple of methods before I actually invoke the proximity query (intersection in my case). Does someone know which methods I have to invoke and which input i have to provide? A little bit of example code would be very nice!! Greetz