Takuya OSHIMA wrote:
Hi there,
We are trying to use Gmsh 2.3.1 on Linux in order to convert an I-deas
universal mesh that comes with Code_Aster 9.4, ahlv100j.msup (that can
also be found as a gzip-compressed attachment to this mail), to the
Gmsh .msh format for validating against Code_Aster our own FE code
that only supports the Gmsh format. The I-deas mesh mostly consists of
elements of type 118 (10-node 2nd order tetrahedra).
However, if we load and convert the I-deas mesh with Gmsh we see the
connectivity is somewhat broken (beforeFix.png), whereas the
connectivity looks fine (afterFix.png) if we modify
Geo/GModelIO_Mesh.cpp as the attached GModelIO_Mesh.cpp.diff.
Our guess is that either the point ordering of the I-deas mesh file or
the I-deas mesh reader in GModelIO_Mesh.cpp is incorrect, but we could
not draw a definitive conclusion because we could not find a
documentation about the I-deas mesh format on the net.
Does anybody have an idea about this problem?
Hi Takuya,
the problem is that it is indeed very difficult to find a reliable documentation about the I-deas mesh format and the
right point ordering... Some software make different choices and this introduce incompatibilities... It is possible that
we made a mistake in Gmsh, we will certainly take your patch into account.
Cheers,
Dave
--
David Colignon, Ph.D.
Collaborateur Logistique du F.R.S.-FNRS
CÉCI - Consortium des Équipements de Calcul Intensif
ACE - Applied & Computational Electromagnetics
Sart-Tilman B28
Université de Liège
4000 Liège - BELGIQUE
Tél: +32 (0)4 366 37 32
Fax: +32 (0)4 366 29 10
WWW: http://hpc.montefiore.ulg.ac.be/
Agenda: http://www.google.com/calendar/embed?src=david.colignon%40gmail.com
Thanks,
Takuya
Takuya OSHIMA, Ph.D.
Faculty of Engineering, Niigata University
8050 Ikarashi-Ninocho, Nishi-ku, Niigata, 950-2181, JAPAN
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