what tool(s) should I be looking at ?

Help needed pls.

Long time developer for textiles (inc. aerospace). Design 3D parts weaving threads in metal / plastics etc).

Using 15 year old C++ and Opengl extrusions (see http://www.scot3d.com/portfolio/4585167784).

Can anyone advise what tools are worth looking at to take advantage of Nvidia kit ?