[Gmsh] Avoid duplicate entities with Geometry.OCCAutoFix = 0

[Christophe Geuzaine]

gmsh file.igs
Tools->Options->Geometry->Curve labels/Surface labels

You'll se the duplicates

> On 10 Nov 2018, at 08:58, Juan Córcoles <juan.corcoles at uam.es> wrote:
> 
> Dear Christophe,
> 
> Thank you very much for your answer. The idea of displaying the number of lines or surfaces is what I thought I was doing in my examploptionse when I wrote:
> 
> surfaces()=Surface "*";
> Printf("Original Surfaces: ",surfaces());
> lines()=Line "*";
> Printf("Original Lines:", lines());
> 
> after merging the IGS file. At this point, I can't see any duplicated entities (the number is correct), but I don't know if this is what you mean by displaying the curve or surface tags.
> 
> Thank you very much again for your help,
> 
> On Sat, Nov 10, 2018 at 7:05 AM Christophe Geuzaine <cgeuzaine at uliege.be> wrote:
> 
> 
> > On 9 Nov 2018, at 18:48, Juan Córcoles <juan.corcoles at uam.es> wrote:
> > 
> > Dear gmsh-list,
> > 
> > I have gone through several previous posts in the list archive to find a way to avoid the creation of duplicate surfaces when building a volume from a surface loop using the opencascade kernel (assuming I am merging a stp/igs file). I found that setting Geometry.OCCAutoFix = 0 should do the trick as I don't care about orientation. However, I am unable to make it work since the behaviour both with this flag set to 0 or 1 looks the same. Please find attached a small commented example in case anyone can help me.
> 
> Starting for IGS is a bad idea: all the entities are already duplicated in the file - load the IGS file alone and display e.g. the curve or surface tags to convince yourself. If you cannot create the geometry directly within Gmsh I would advise importing your geometry as a STEP file (or BREP if you build it with an OpenCASCADE-based CAD modeler).
> 
> Christophe
> 
> > 
> > Thank you very much in advance,
> > 
> > -- 
> > Juan Córcoles
> > http://rfcas.eps.uam.es/juan.corcoles
> > 
> > <test1.igs><test1.geo>_______________________________________________
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> 
> — 
> Prof. Christophe Geuzaine
> University of Liege, Electrical Engineering and Computer Science 
> http://www.montefiore.ulg.ac.be/~geuzaine
> 
> Free software: http://gmsh.info | http://getdp.info | http://onelab.info
> 
> 
> 
> -- 
> Juan Córcoles
> http://rfcas.eps.uam.es/juan.corcoles
> 

— 
Prof. Christophe Geuzaine
University of Liege, Electrical Engineering and Computer Science 
http://www.montefiore.ulg.ac.be/~geuzaine

Free software: http://gmsh.info | http://getdp.info | http://onelab.info