3D碰撞检测 http://gamma.cs.unc.edu/research/collision/packages.html#cullide
国外好的图形学网站????????
几何、三维问题http://www.cs.sunysb.edu/~algorith/
官网:
http://developer.nvidia.com/node/76
http://msdn.microsoft.com/en-us/library/ee663274(v=vs.85)
http://www.computer.org/portal/web/computingnow/cga