cglm (C graphics math library) cglm is a highly optimized 2D and 3D graphics math library for the C programming language. The library provides many utilities to help math operations stay fast while remaining easy to write. cglm is based on the GLM math library that has bindings for the C++ programming language. The library is primarily used for operations with the OpenGL graphics API. The complete documentation is available at http://cglm.readthedocs.io/. Optional dependencies, autodetected: Sphinx and sphinx-rtd-theme (for building documentation). If you have these installed, but would like to skip building the docs, export DOCS=no in the script's environment.