> On 4 Mar 2018, at 17:46, Juan E. Sanchez <[email protected]> wrote:
>
> Using the latest Mac OS snapshot, it is the same behavior.
>
> 3 sections appear (air, gate, air)
>
> I go into the visibility dialog, visualize both "gate" and "air", and the
> last "air" disappears.
>
I think you are misunderstanding the definition of physical groups. Your
boolean operations create 3 elementary volumes : left, center and right. You
put the left one in the physical group "air" and the middle one in "gate".
(Note that your boolean operations are unnecessarily complicated - you could
just fragment the 2 boxes instead of doing a difference followed by a fragment.)
So if you select the 2 physical groups, indeed you hide the right volume...
> If I mesh before opening the visibility dialog, all 3 sections get meshed.
>
Normal again: by default with the MSH2 format Gmsh only saves elements that
belong to physical groupe.
> When I save the mesh, and then open the mesh file, one of the "air" sections
> is missing.
>
>
> Starting over:
>
> If I open the visibility dialog, and select both physical groups, one of the
> "air" sections disappear.
>
> Looking in the Elementary entities, it appears that there are 3 volumes. It
> looks like one of the "air" sections did not get assigned to the Physical
> Group.
>
> How do I ensure that both "air" sections get assigned to the same Physical
> Group?
>
Physical Group ("air") = {3,4};
Christophe
> Regards,
>
> Juan
>
>
>
>
> On 3/4/18 1:21 AM, Christophe Geuzaine wrote:
>> Dear Juan,
>> Not sure what you observe - your file seems to behave normally with the
>> latest version. Can you try with the latest automated snapshot ?
>> Christophe
>>> On 3 Mar 2018, at 20:40, Juan E. Sanchez <[email protected]
>>> <mailto:[email protected]>> wrote:
>>>
>>> Hello,
>>>
>>> I am using the OpenCASCADE factory to create a fairly complicated
>>> structure. In this simplified test case, I run into the issue where part
>>> of the structure disappears when the center of it is removed.
>>>
>>> When GMSH opens the file, it looks correct. Then when I start manipulating
>>> it in the Visibility dialog, half of the "air" volume disappears.
>>>
>>> When 3d meshing half of the "air" volume is also missing.
>>>
>>> When I reopen the saved mesh, half the "air" volume is also missing.
>>>
>>> Could someone please take a look?
>>>
>>>
>>> Regards,
>>>
>>> Juan Sanchez
>>> <test.geo>_______________________________________________
>>> gmsh mailing list
>>> [email protected] <mailto:[email protected]>
>>> 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
>
—
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
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