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

[Juan Córcoles]

Dear all and Christophe

I am really sorry, I was just looking at surface tags in the GUI. Those
ones are not duplicated, but line tags do, as well as points. So from what
I understand, even trying to define a volume over a set of non-duplicated
surfaces will force GMSH to make the necessary changes if lower-dimensional
entities are duplicates. I will try to find a solution knowing this.

Thank you very much again for your help and sorry for my misunderstanding,

On Sat, Nov 10, 2018 at 8:23 AM Juan Córcoles <juan.corcoles at uam.es> wrote:

> Dear Christophe,
>
> Thanks again: yes, obviously I have that option too, but I don't see any
> duplicates when I merge the file. The duplicates appear after I create a
> surface loop. That is what I was trying to say from the beginning. I tried
> to be sure of that before sending my meesage, so that is why I used a very
> simple model.
>
> Thank you very much for your help,
>
> On Sat, Nov 10, 2018 at 8:18 AM Christophe Geuzaine <cgeuzaine at uliege.be>
> wrote:
>
>>
>> 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>_______________________________________________
>> > > gmsh mailing list
>> > > gmsh at onelab.info
>> > > http://onelab.info/mailman/listinfo/gmsh
>> >
>> > —
>> > 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
>>
>>
>
> --
> Juan Córcoles
> http://rfcas.eps.uam.es/juan.corcoles
>
>

-- 
Juan Córcoles
http://rfcas.eps.uam.es/juan.corcoles
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