I've released a new library opengl_extrusions which is a Numpy and Cython library that does 3D extrusions (like the GLE library) and tessellations (one of the things the GLU library does). The motivation being that the GLE library is constrained to compatibility contexts (think "legacy OpenGL"), so it doesn't work under modern core-profile contexts. The library has a very different API from GLE, but it does the same jobs, and has a conformance suite that verifies that it creates the same final shapes for a given input, albeit with a (hopefully cleaner) API. With the new API you get back a structure that looks exactly like what you use to construct a glTF object, arrays of points and index pointers.

Tessellation is handled with the CDT algorithm, which is not what GLU's tessellator uses. GLU is deprecated on some platforms (Mac), so we'll eventually need to move off it. This is just one piece of doing that, but it's a useful piece. CDT's biggest advantage is that it can avoid long spiky triangles that tend to cause rendering artefacts.

The library is entirely LLM coded, though I've tweaked docs here and there.