Is there any 3D visualization library or toolkit for C? (No C++ please!)

Question

Basically I'm interested in knowing if there exists any openGL 3D visualization toolkit for C for scientific uses?

Answer 1

I don't know about any straight forward libraries, but Vis5D+ ist written in C, iirc. Maybe you can incorporate that into your project.

Edit: Oh, and of course IBM's DX is also there, but also not a library.