Faster 3D

I’ve found draw_3d* to be quite slow so I added vertex buffers. You must use one to use draw_3d.

I’ve found I can draw double the triangles of a PlayStation 2 (with more features) on this PC… PS2 can draw 16 million 75 px tris per second and I can double that with vertex buffers. That’s around 550,000 tris per frame.