NAME

       msh2geo - convert gmsh mesh in geo format

SYNOPSIS

         msh2geo [-zr|-rz] input[.msh] > output.geo

DESCRIPTION

       Convert  a  gmsh `.msh' into `.geo' one.  The output goes to standart output.  See the gmsh documentation
       for a detailed description of the `.mshcad' input file for gmsh.

EXAMPLES

         gmsh -2 toto.mshcad -o toto.msh
         msh2geo toto.msh > toto.geo

         gmsh -2 -order 2 toto.mshcad -o toto2.msh
         msh2geo toto2.msh > toto2.geo

COORDINATE SYSTEM OPTION

       Most of rheolef codes are coordinate-system independant.  The  coordinate  system  is  specified  in  the
       geometry file `.geo'.

       -zr

       -rz    the 2d mesh is axisymmetric: zr (resp. rz) stands when the symmetry is related to the first (resp.
              second) coordinate.

NOTES

       Pk triangle, when k>=5, may have internal nodes renumbered: from the

GMSH DOCUMENTATION

         The nodes of a curved element are numbered in the following order:

           the element principal vertices;
           the internal nodes for each edge;
           the internal nodes for each face;
           the volume internal nodes.

         The numbering for face and volume internal nodes is recursive,
         i.e., the numbering follows that of the nodes of an embedded face/volume.
         The higher order nodes are assumed to be equispaced on the element.

       In  rheolef,  internal  triangle  nodes  are numbered from left to right and then from bottom to top. The
       numbering differ for triangle when k >= 5.  Thus, msh2geo fix the corresponding internal nodes  numbering
       during the conversion.

       Pk tetrahedrons and hexaedrons in gmsh and rheolef has not the same edge-node order nd orientation.  E.g.
       for  tetrahedrons,  edges  13 and 23 should be swaped and reoriented as 32 and 31.  Thus, msh2geo fix the
       corresponding internal nodes numbering.

TODO

FIX FOR P3-TETRA

        swap edges orientations for 3,4,5 and swap faces 1 and 2. Check P4(T)  for  face  orientation.   Perform
       face visualisation with gnuplot face fill.

       See also hexa edges orient and faces numbers and orient.

       Check  that  node  are  numbered  by  vertex-node,  then  edge-node,  then  face(tri,qua)-node  and  then
       volume(T,P,H)-node.  Otherwise, renumber all nodes.

       Support for high order >= 6 element ? not documented in gmsh, but gmsh supports it at run

rheolef-6.7                                        rheolef-6.7                                 msh2geo(1rheolef)