[Gmsh] [gmsh] create geometry with source code

[Benjamin Ruard]

Hi,
I would like create a .geo file generated with c++ code. It is a succes
to create vertex, line, surface and volume with GeoFactory class.
Now i would like to create a circle arc, a ruled surface, a physical
surface and a physical volume.
I see few methods are not implemented like addCircleArc in
GModelFactory.
Does an other factory exist?
If it does not exist, what class/method I must use.

Thanks for your help
Benjamin JEANTY-RUARD