I recently managed to import a .mesh file to freefem++. The mesh was created in gmsh and was exported to the .mesh format within gmsh. No particular intervention was needed.
Regards Dimitris Στις Πέμπτη 25 Ιούνιος 2009 07:00:53 Geordie McBain γράψατε: > On Sat, Jun 7, 2008 at 1:05 AM, David Colignon<[email protected]> wrote: > > Hi, > > > > if freefem++ can read the medit mesh format, then the latest Gmsh version > > 2.2 is able to export a mesh in this medit format. > > Yes, but I found I had to reorder the listing of vertices for each > tetrahedron in the output MEDIT .mesh file or FreeFem++ (v. 3.3-3) > thinks the volumes are negative (and other finite element operations > nonsensical). I did this in Gawk (an action like { print $1, $3, $2, > $4, $5 } on the lines following the one matching "Tetrahedra"). Did > others have this problem? > Should the writeMESH function be modified? I think it'd be only a > couple of local lines of code, which I could supply. I couldn't see a > specification for the convention on vertex-numbering in the MEDIT > .mesh format (Frey's INRIA technical report > http://www.ann.jussieu.fr/~frey/publications/RT-0253.pdf). Is it only > FreeFem++'s > interpretation of the MEDIT .mesh format that is idiosyncratic? > I think there are only two essentially different ways to number the > four vertices in a tetrahedron, just as there are only two for a > three-node triangle in a plane. For the triangle, it's clockwise or > counterclockwise looking down on the plane, and for the tetrahedron > similarly for the triangle defined by the first three vertices, > looking from the fourth vertex. The Gmsh .msh file format description > in Gmsh ch. 9 does seem to imply one of these two choices rather than > the other for four-node tetrahedra. > I'm using Gmsh 2.3.1 on openSUSE 10.2 and Gmsh 2.2.5 as > packaged for Ubuntu Hardy. > (I realize this is a very old post to reply to; should I have > started a new thread?) > > Geordie McBain > http://gdmcbain.freeshell.org > > _______________________________________________ > gmsh mailing list > [email protected] > http://www.geuz.org/mailman/listinfo/gmsh _______________________________________________ gmsh mailing list [email protected] http://www.geuz.org/mailman/listinfo/gmsh
