Yocto/GL
Yocto/GL: Tiny C++ Libraries for Data-Driven Physically-based Graphics
...Yocto/GL is written in a deliberately data-oriented style for ease of development and use. Yocto/GL is split into small libraries to make code navigation easier. See each header file for documentation. Simple shape data structure, utilities for manipulating triangle meshes, quads meshes and line sets, computation of normals and tangents, linear and Catmull-Clark subdivision, procedural shapes generation, ray intersection and closest point queries. Ray intersection and closest point queries of triangle meshes, quads meshes, line sets and shape instances using a two-level bounding volume hierarchy. ...