[Gmsh] conformal mulitregion meshing from commandline +step file import

[Zenker, Dr. Matthias]

Hi,

AFAIK gmsh can NOT generate a conformal 3D mesh for a multibody STEP file with common interfaces between the bodies, (except for very simple cases where "cut and merge faces" works). If I am wrong here, I would be most interested to learn how this is achieved.
The only way I know to achieve a conformal mesh with OpenSource tools is to use Salomé, import the STEP there, and do a partition. Then you can either do the meshing in Salomé or use gmsh (which has a better meshing capability than Salomé to my experience). In the latter case, export the partitioned geometry in brep format, import in gmsh and mesh.

HTH,

Matthias


> -----Ursprüngliche Nachricht-----
> Von: Anan Im [mailto:ananim343297 at yandex.com]
> Gesendet: Sonntag, 25. Oktober 2015 10:41
> An: gmsh at geuz.org
> Betreff: [Gmsh] conformal mulitregion meshing from commandline +step file
> import
>
> Hi everybody,
> as to my knowledge gmsh is capable of "conformal" meshing from command
> line: For example with Justin Blacks pycalculix  on
> http://justinablack.com/pycalculix/ one can use gmsh for it, in this case in a
> way, where the meshing functions are written into the .geo file - beneath
> the cad functions.
> On the other hand there are scripts that export step files for meshing to
> gmsh, using its command line interface. Already I experimented with
> exporting a so called compound - but did not succeed in terms of conformal
> meshing by now.
>
> Which leads to the question:
> Can not one communicate the meshing functions (Mesh.*) from/through
> the command line, if geometry is imported from a cad program, lets say in
> step format, anything different from geo?
>
> I might express that I will be very thankful (and not only mine) if there gets
> (known) a non interactive conformal meshing interface to the open source
> world.
> So if you can exclude that there is a way, which would be a valuable
> information in itself btw, would you put this as "feature request" on the list
> of future development?
>
> Thanks in advance
>



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