msh2geo(1rheolef)						    rheolef-6.1 						 msh2geo(1rheolef)

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-6.1							    rheolef-6.1 						 msh2geo(1rheolef)