After realizing that GLM is under the GPLv3 license and requires any program using it to also release its full source, I have been working on a simple (non-SIMD) replacement for it in my personal C++ toolkit.

As of this morning I have completed all basic functionality for vec1-4 and mat2x3-mat4x4, including all operators and construtors in 29 files and 4634 lines of actual code (not counting comments and blank lines).

What a slog. I did not want to have to write my own GL math library. Now on to all the extended functions...