[Gmsh] labels from brep or step files?

[Guilherme Praciano Karst Caminha]

It is also not possible export a given topology/geometry made in
OpenCASCADE directly into the Gmsh API (using importOCCshape) using, for
example, Topological Naming so that Gmsh recognises these as Physcal
Entities, correct?
But it may be possible to make the conversions by hand, I think, by
iterating through the shapes and keeping an eye for any names.
Am I wrong?

2014-11-16 20:34 GMT-02:00 Geordie McBain <gdmcbain at freeshell.org>:

> 2014-11-15 15:44 GMT+11:00 j s <j.s4403 at gmail.com>:
> > I'm experimenting with FreeCAD to generate a mesh with multiple materials
> > with the brep (or step) format.  Unfortunately it doesn't seem possible
> to
> > label the surfaces or volumes so gmsh considers them as physical names.
> As
> > far as I was able to research, this is named Topological Naming, and it
> is
> > currently not available in FreeCAD.
> >
> > Are there any open source solid modeling tools which support this?
>
> Not that I know of, but this would be a nice feature.
>
> > Does gmsh
> > support reading in the names from brep or step files (or any other
> format)?
>
> Again not that I know of.
>
> One approach which can be used in Gmsh if it's parts of the boundary
> that are to be named (e.g. for imposing different boundary conditions
> in the subsequent finite element analysis) is to define those parts in
> the CAD (e.g. FreeCAD) and export each as a separate surface file
> (BRep works fine but STL is possible too).  When they're merged into
> Gmsh one at a time, they're kept track of that way.
>    This is a fair way short of what you're asking for, but is enough
> for some applications.
>
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