As a first step, don't bother with the orientation of the surfaces, just build the "surface loop" list of surfaces
delimiting your volume, and try to mesh the volume to see if everything is OK.
If you use the GUI to build your volume, the orientation of the surfaces is
automatically accounted for.
Dave
Heye Zhang wrote:
Hi david
thanks for your prompt reply. I am converting another file format(cmgui)
into geo file(gmsh). In cmgui, there is no orientation of surface. So I
am trying to figure out how to define the orientation for surface. To
lineloop, it is quite simple and the sign is determined by the
connecting node.
but for surfaceloop, i just do not have a clue how to define the
orientaion so that i can get a closed surface. It seems that in the
manual this has not been stated.
thanks
On Thu, Jul 23, 2009 at 7:02 PM, David Colignon
<[email protected] <mailto:[email protected]>> wrote:
Hi,
you can visualize the orientation of the surfaces (and the influence
of the minus sign) by putting a non-zero value in
Tools->Options->Geometry->Visibility->Normals box.
idem for the mesh in Tools->Options->Mesh->Visibility->Normals
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/
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Heye Zhang wrote:
HI there
I am newer to gmsh. I read the tutorial and I have a question
now. For line loop, there will be a sign to define the proper
connection. but in for volume loop how to determine whether I
should put a sign overthere? according to the normal of surface?
--
Heye ZHANG
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