UV unwrap and atlas packing for ofMesh via xatlas. Details: addon_config.mk.
Quick use:
#include "ofxAtlas.h"
auto r = ofxAtlas::unwrapMesh(mesh, {});
if (r.ok) { /* r.mesh UVs are 0–1; see r.atlasWidth / r.atlasHeight */ }Multi-mesh unwrap or packing existing UVs: ofxAtlas::Atlas — addMesh / addUvMesh, then generate() or chart/pack steps; buildOfMesh(...) needs the same source geometry you fed in.
License: bundled xatlas is MIT (libs/xatlas_core/xatlas.h).