[Gmsh] saving Physical entities in -format inp

[Christophe Geuzaine]

Hi Geordie,

But there are ELSETS for physical groups in the file you sent: see at the end of the file...

Would you want the additional ELSETS for the elementary entities to be removed?

(We have been trying to rationalize the use of "groups" in Gmsh; eventually we want to make them consistent across formats, and between Gmsh and other tools. The main problem with the old approach was that we always had to renumber the nodes/elements in the output files, and we duplicated elements belonging to multiple physical groups. This made it impossible to have a "non-lossy" write/read cycle, as internally Gmsh could not represent what we saved on disk!)

Christophe

On 16 Jul 2013, at 03:39, Geordie McBain <gdmcbain at freeshell.org> wrote:

> Whereas I read on 2 May ('Problem with importing a mesh in Abaqus',
> http://www.geuz.org/pipermail/gmsh/2013/008151.html
> ) that
> 
>     "Physical" elements are nicely recognized as Assembly's Sets,
> even with their name.
> 
> this does not seem to be the case, that rather the ELSETS reflect the
> Elementary entities, not the Physical.  This behaviour seems to be
> unaffected by the option Mesh.SaveElementTagType=2, which does do the
> trick for '-format mesh'
> (http://www.geuz.org/pipermail/gmsh/2009/004818.html).
> 
> This applies too for the total.geo and total.inp files attached to the
> earlier post, but I have also written and attached a simpler example:
> a triangle in which two of the sides are in one Physical Line while
> the third is in a second.  Then grepping "type" in the .inp file shows
> how many ELSETS are created.  I get four: one area (as expected), but
> three lines whereas I'd hoped for only two.
> 
> Is there a way to get the ELSETS in '-format inp' to reflect the
> Physical entities rather than the Elementary?
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-- 
Prof. Christophe Geuzaine
University of Liege, Electrical Engineering and Computer Science 
http://www.montefiore.ulg.ac.be/~geuzaine