I try to compile the shadow volume demo of nVIDIA as below website: http://developer.nvidia.com/object/fast_shadow_volumes.html But I have some problem. I used the VC++6.0 to compile the demo source code with "G3D 6.00 beta 7" and "SDL 1.2.5". But it appears one error as below: Cannot open include file: 'xmmintrin.h': No such file or directory Shoould I must download the SDK as below? GLUT (included with G3D) OpenGL 1.4 (included with G3D) NVIDIA SDK extensions (included with G3D) [Edited by - akira32 on November 28, 2007 6:01:46 AM]

I believe that's the SSE intrinsics functions header. You can probably find it at Intel or AMD. Perhaps you can comment it out and it will compile without it?

I hardly believe it will. Intrinsics however are not going to work on VC6 as far as I remember.