Hi david<br><br>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.<br>
<br>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.<br><br>thanks<br><br><div class="gmail_quote">On Thu, Jul 23, 2009 at 7:02 PM, David Colignon <span dir="ltr"><<a href="mailto:David.Colignon@ulg.ac.be">David.Colignon@ulg.ac.be</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">Hi,<br>
<br>
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.<br>
<br>
idem for the mesh in Tools->Options->Mesh->Visibility->Normals<br>
<br>
Cheers,<br>
<br>
Dave<br>
<br>
-- <br>
David Colignon, Ph.D.<br>
Collaborateur Logistique du F.R.S.-FNRS<br>
CÉCI - Consortium des Équipements de Calcul Intensif<br>
ACE - Applied & Computational Electromagnetics<br>
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<br>
<br>
<br>
Heye Zhang wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><div><div></div><div class="h5">
HI there<br>
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?<br>
<br>
-- <br>
Heye ZHANG<br>
<br>
<br></div></div>
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</blockquote>
<br>
</blockquote></div><br><br clear="all"><br>-- <br>Heye ZHANG<br>