[Gmsh] Extrude from imported geometry

[Jeremy Theler]

Can the new OpenCASCADE factory be used to first merge say an imported
2D BREP and the extrude the path? Pseudo-geo:

SetFactory("OpenCASCADE");
Merge("2dbrep.brep");
Extrude{0,0,0.3}{ Surface{1:3}; }




-- 
Jeremy Theler
www.seamplex.com



On Mon, 2017-03-06 at 21:38 +0100, Daniel wrote:
> Hi,
> 
> thank you very much for your answer!
> 
> Indeed, I don't think that using gmsh to create the geometry is an
> option in my case. I am creating the geometry using opencascade
> internally and it is therefore only available as brep.
> 
> Currently it seems to me, that the error occurs all the time with
> imported geometry, so I gave this simple example to show the problem.
> My question was more generally, if extruding is possible with imported
> geometry at all, or if it is limited to native gmsh geometry.
> 
> By the way, the error occurs no matter if you extrude just the
> geometry, or the mesh alongside the geometry (although extruding the
> mesh is more relevant to me, as I can use opencascade, to just extrude
> the geometry).
> 
> Best regards,
> Daniel
> 
> 
> Am Montag, den 06.03.2017, 16:04 +0000 schrieb DILASSER Guillaume:
> > Hi Daniel,
> >  
> > The Extrude command works primarily with geometry objects and not
> > mesh objects. It can be used to Extrude mesh elements (for example
> > using the "Layer" option) but only if you are extruding them
> > alongside the supporting geometry. That is why you are able to work
> > with the Gmsh "mesh" (you extrude the geometry and the mesh follows)
> > but not the imported Brep. If you can, I would suggest you to build
> > the 2D geometry to be extruded within Gmsh instead of importing it,
> > it would save a lot of trouble… Nevertheless, I imagine you do have a
> > good reason, if that is the case let me know.
> >  
> > Sincerely Yours,
> >  
> > Guillaume DILASSER
> > Doctorant SACM / LEAS
> > CEA - Centre de Saclay - Bât.123 - PC 319c
> > 91191 Gif sur Yvette Cedex - France -
> >  
> > guillaume.dilasser at cea.fr
> >  
> > -----Message d'origine-----
> > De : gmsh [mailto:gmsh-bounces at ace20.montefiore.ulg.ac.be] De la part
> > de Daniel
> > Envoyé : vendredi 3 mars 2017 21:11
> > À : gmsh at onelab.info
> > Objet : [Gmsh] Extrude from imported geometry
> >  
> > Hi,
> >  
> > Even with the most simple example, I am not able to extrude a mesh
> > from an imported .brep geometry (see attachment). I always get an
> > error message like:
> >  
> > Error   : Impossible to extrude entity 1 (of type 306)
> >  
> > Extruding from native gmsh geometry works fine.
> >  
> > Is the Extrude command not supported for imported geometry, or am I
> > doing something wrong?
> >  
> >  
> > Best Regards
> > Daniel
> > _______________________________________________
> > gmsh mailing list
> > gmsh at onelab.info
> > http://onelab.info/mailman/listinfo/gmsh
> 
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