[Gmsh] question about python api

[Christophe Geuzaine]

> On 29 Nov 2019, at 09:06, Frederic Dubois <frederic.dubois at umontpellier.fr> wrote:
> 
> Hi Christophe,
> 
> In fact I did things in the "complicated" way to be able to recover the 2D elements on the skin of the grains.
> 
> Using fragments, these elements are not created or saved even if I create a 2D physical group (here "itz".
> 

Works fine here. (Maybe you left gmsh.fltk.run() in the script? Saving the mesh happens afterwards...)

Christophe

> Using the "complicated" way, how can I remove the duplicated nodes (like using coherence in .geo file) ?
> I tried to do this by fusing the two meshes but I am not confident in the result.
> 
> Regards
> 
> ----- Mail original -----
>> De: "Christophe Geuzaine" <cgeuzaine at uliege.be>
>> À: "Frederic Dubois" <frederic.dubois at umontpellier.fr>
>> Cc: "gmsh" <gmsh at onelab.info>
>> Envoyé: Jeudi 28 Novembre 2019 23:12:28
>> Objet: Re: [Gmsh] question about python api
> 
>>> On 28 Nov 2019, at 22:42, Frederic Dubois <frederic.dubois at umontpellier.fr>
>>> wrote:
>>> 
>>> Hi Christophe,
>>> 
>>> You are right, this is the best way.
>>> 
>>> Can you comment this ?
>>> f.remove(sphere1)
>>> f.remove(sphere2)
>> 
>> Fragment tries hard to keep intact the tags of those entities that have not been
>> modified, here the two spheres. So I remove these two from the list of returned
>> entities, which gives me the remaining (new) volume - the paste.
>> 
>> Christophe
>> 
>> 
>>> 
>>> Regards
>>> 
>>> ----- Mail original -----
>>>> De: "Christophe Geuzaine" <cgeuzaine at uliege.be>
>>>> À: "Frederic Dubois" <frederic.dubois at umontpellier.fr>
>>>> Cc: "gmsh" <gmsh at onelab.info>
>>>> Envoyé: Jeudi 28 Novembre 2019 21:31:12
>>>> Objet: Re: [Gmsh] question about python api
>>> 
>>>>> On 28 Nov 2019, at 20:06, Frederic Dubois <frederic.dubois at umontpellier.fr>
>>>>> wrote:
>>>>> 
>>>>> Dear all,
>>>>> 
>>>>> I am trying to mesh a composite material made of paste and grains.
>>>>> Since I have to do some Boolean operation on a 3D volume of composite I tried to
>>>>> use the occ factory.
>>>>> At the end of the day I need a continuous mesh where paste elements of the mesh
>>>>> belong to a paste physical group and grains elements belong to an other
>>>>> physical group.
>>>>> 
>>>>> In the attached script I first create a cylinder and two grains.
>>>>> Using a cut I was able to obtain a mesh with all the elements belonging to the
>>>>> paste.
>>>>> Using a fuse I was able to obtain a mesh with all the elements belonging to the
>>>>> grains.
>>>>> Unfortunately, it seems that the two meshes are separated.
>>>>> 
>>>>> I tried to fuse them to obtain a continuous mesh but I am not sure it works fine
>>>>> and that it is the proper method.
>>>>> 
>>>>> Any advice ?
>>>> 
>>>> Simpler to use fragments:
>>>> 
>>>> 
>>>> 
>>>> 
>>>> Christophe
>>>> 
>>>> 
>>>>> 
>>>>> Regards
>>>>> 
>>>>> --
>>>>> Frédéric Dubois, PhD, Eng.
>>>>> ---
>>>>> Directeur adjoint du LMGC.
>>>>> Laboratoire de Mécanique et Génie Civil - CNRS/UM
>>>>> cc 048, 163 rue Auguste Broussonnet, 34090 Montpellier
>>>>> http://www.lmgc.univ-montp2.fr/~dubois
>>>>> Tel: 33/0 467144984
>>>>> Mobile: 33/0 635490843
>>>>> <composite.py>_______________________________________________
>>>>> 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
>>> 
>>> --
>>> Frédéric Dubois, PhD, Eng.
>>> ---
>>> Directeur adjoint du LMGC.
>>> Laboratoire de Mécanique et Génie Civil - CNRS/UM
>>> cc 048, 163 rue Auguste Broussonnet, 34090 Montpellier
>>> http://www.lmgc.univ-montp2.fr/~dubois
>>> Tel: 33/0 467144984
>>> Mobile: 33/0 635490843
>> 
>> —
>> Prof. Christophe Geuzaine
>> University of Liege, Electrical Engineering and Computer Science
>> http://www.montefiore.ulg.ac.be/~geuzaine
> 
> -- 
> Frédéric Dubois, PhD, Eng.
> ---
> Directeur adjoint du LMGC.
> Laboratoire de Mécanique et Génie Civil - CNRS/UM
> cc 048, 163 rue Auguste Broussonnet, 34090 Montpellier
> http://www.lmgc.univ-montp2.fr/~dubois
> Tel: 33/0 467144984
> Mobile: 33/0 635490843
> <composite.py><composite_simpler.py>

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