pre-pos_processing_gmsh-herezh

The msh2geo.pl script creates a .geo file from a .pos or a .msh file.
The conversion is partial and is only devoted to:
- the set of nodes
- the set of elementary lines (one per bar element and one per side surface element)
- the set of elementary surface (one per elementary surface element).

The msh2geo.pl is an adaptation of the msh2her.pl script.