10.1 Main code structure

Gmsh's code is structured in several libraries, roughly separated between the three main core modules (Geo, Mesh, Post) and associated utility libraries (Common, Numeric) on one hand, and graphics (Graphics) and interface (Fltk, Box) libraries on the other.

The geometry and mesh modules are based on an object-oriented model class (Geo/GModel.h), built upon abstract geometrical entity classes (Geo/GVertex.h, Geo/Gedge.h, Geo/GFace.h and Geo/GRegion.h).