[Dune] Fwd: gmsh2dgf
a.s.dedner at warwick.ac.uk
Thu Jun 26 17:28:19 CEST 2014
My question has nothing to do with dgf or experimental grid extensions.
The dgfwriter just takes a grid and used the intersection.boundaryId()
method to write
the ids into the file (that method is now only available with
So that will not work since the gmsh reader will not set these
boundaryId so that this
metod could actually read them.
So the question is: how can the user extract boundary data provided in a
gmsh file using the
gmsh reader. So just a question about gmsh and the reader not about dgf
or any grid extensions....
On 26/06/14 14:53, Oliver Sander wrote:
> I don't know much about either dgf or the EXPERIMENTAL_GRID_EXTENSIONS.
> It may well be that the gmshreader contains a bug (it was me who wrote parts
> of it, after all :-) ) but to look into that we'd need a more precise
> report of what's going wrong.
> Am 26.06.2014 11:52, schrieb Andreas Dedner:
>> Since you are getting the boundarysegment block in your dgf file, you seem to be using
>> the DUNE_GRID_EXPERIMENTAL_GRID_EXTENSIONS so that intersection.boundaryId() is
>> available. The problem is that adding boundary ids was decided to be unnecessary.
>> I don't know that much about the gmsh format or the reader to know if boundary id information
>> from the gmsh file is in some way passed on to the user. If so it will not be made available ithriough
>> the intersection.boundaryId method but stored somehow externally and you will have to modify the
>> code in io/file/dgfparser/dgfwriter.hh accordingly
>> (search for iit->boundaryId(); and replace that call).
>> Perhaps experts on gmsh to provide the way to get the boundary ids out of the gmsh file.
>> On 26/06/14 07:19, Jelena Griz(ic' wrote:
>>> Dear all,
>>> I have a problem using gmsh2dgf (also applies to gmshreader.hh): it doesn't seem to pick boundary segment ids from.msh file rather using some default value (1) for all boundary elements.
>>> Example of .msh and .dgf file obtained using gmsh2dgf are in attachment.
>>> Thank you in advance,
>>> Jelena Grizic
>>> Dune mailing list
>>> Dune at dune-project.org
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