If you just want to rotate point clouds, it might be hard to do better than taking apart and studying a project that does that (like this one). http://www.arcs

If you just want to rotate point clouds, it might be hard to do better than taking apart and studying a project that does that (like this one). http://www.arcsynthesis.org/gltut/index.html http://www.arcsynthesis.org/gltut/index.html will give you a good general background, though.