[Gmsh] crash when meshing 'cleaned' STEP file

[Zenker, Dr. Matthias]

Hi Mark,
 
 
thank you for pointing me to MeshLab. I just had a quick look on it. The
problem is that in stl format, all information about the triangles being
assigned to surfaces seem to get lost. So even if the
self-intersecting/duplicate faces can be collapsed, I cannot reconstruct
the geometry, especially the volumes, which I need to do in order to
create a 3D mesh.
 
Best regards,
 
Matthias
________________________________

Von: Smith, Mark [mailto:Mark.Smith at Linx.co.uk] 
Gesendet: Freitag, 8. April 2011 18:06
An: Zenker, Dr. Matthias; gmsh at geuz.org
Betreff: RE: [Gmsh] crash when meshing 'cleaned' STEP file


Hi Matthias
Have you had a look at MeshLab http://meshlab.sourceforge.net/ which
might enable you to do what you want if you export in stl format first?
 
Regards
mark

________________________________

From: gmsh-bounces at ace20.montefiore.ulg.ac.be
[mailto:gmsh-bounces at ace20.montefiore.ulg.ac.be] On Behalf Of Zenker,
Dr. Matthias
Sent: 08 April 2011 14:19
To: gmsh at geuz.org
Subject: [Gmsh] crash when meshing 'cleaned' STEP file



Hi, 

I am working on a method to 'clean' STEP files in order to get a
conformal mesh between adjacent bodies. If I get it to work, I will be
happy to share it, but I am still struggling at the moment...

My problem is that gmsh will not mesh my 'cleaned' geometry. What I try
to do is to determine the surfaces and lines which are identical, delete
the unnecessary ones and redefine the volumes using the remaining
surfaces. I use an external tool (scilab script), so I did not modify
gmsh. Please find in the attachment my test geometry in STEP format and
the geo file I want to use for the 3D mesh. gmsh does the 2D and 2D
meshing without problems, but crashes during the 3D mesh (either I get a
net crash, or gmsh does not respond any more after some time, and I have
to kill it). Did I do something wrong when generating the geo file? I
would be very happy if someone could have a look on my case.

I am using gmsh 2.5.1svn under Windoze XP. 

Thank you for any hint, 

Matthias 

---------------------------------------------------------------- 
ERBE Elektromedizin GmbH 
Dr.rer.nat. Matthias Zenker 
Dipl. Phys. 
Grundlagenentwicklung / Fundamental Development 
Waldhoernlestrasse 17 
72072 Tuebingen 
Germany 
Phone + 49 (0) 7071 755 - 226 
Fax + 49 (0) 7071 755 - 5226 
E-Mail: <mailto:Matthias.Zenker at erbe-med.com
<mailto:Matthias.Zenker at erbe-med.com> > 
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<<Baugruppe1_overlap.zip>> 


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