Hi alex, Same problem i faced. Now i solved it using engrid.
Export the volume mesh to *.msh format in gmsh. Then import to engrid and create the physical boundary conditions using "set boundary codes" and export it back to gmsh format. Hope it helps ! On Tue, Jul 21, 2009 at 8:13 PM, Mark van Doesburg < [email protected]> wrote: > Hello Alex, > > I am using BRL-CAD to generate input for gmsh as well. What I initially > did was to use g-iges to generate a faceted brep model, for example: > > g-iges -o region.iges -f brl.g region.r > > > For each region I generated a seperate IGES file. If you merge the iges > files using the Merge command in the .geo file you can add physical > regions and surfaces. > > When using the IGES format, each triangle will be a seperate geometrical > surface. > > regards, > > Mark van Doesburg > > > Alexandre Pereira <[email protected]> wrote: > > Hi Forum > > I want to use GMSH to mesh *.stl files that have been built > elsewhere ( In BRL CAD to be more exact ) which will be used as > models for FEA analysis in Code Aster. > > I want to export them in *.med format containing the > mesh info as well as some topological info about physical > lines/surfaces/volumes. > > In GMSH, I can import the *.stl, define a volume using the *.stl > boundary, mesh/refine the boundary, and mesh/refine the created > volume, what i cannot ( do not know how to ...) do is to separate > the boundary of my *stl in primitive faces to give the a physical > meaning ( they will be used on Boundary condition addressing in > ASTER ), can this be done in GMSH, or sould I build my geometry > in GMSH prior to do all this...? > > > My maisn issue is that BRL CAD contains some 3D primitives that do > not exist in GMSH, like elliptical/hyperbolic cones generalyzed > ellipsoids, etc, and I use the generated surfaces in my *.stl > as boundaries in some of my models.... > > > Can someone please help...? > > > Best regards > > > Alex > > _______________________________________________ > gmsh mailing list > [email protected] > http://www.geuz.org/mailman/listinfo/gmsh >
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