[Gmsh] boolean partitioning

[Zenker, Dr. Matthias]

Great!
I will try it as soon as I can...

Matthias



> -----Ursprüngliche Nachricht-----
> Von: Christophe Geuzaine [mailto:cgeuzaine at ulg.ac.be]
> Gesendet: Mittwoch, 3. Mai 2017 10:56
> An: Zenker, Dr. Matthias
> Cc: andrew; gmsh at onelab.info
> Betreff: Re: [Gmsh] boolean partitioning
>
>
> > On 3 May 2017, at 10:36, Zenker, Dr. Matthias <Matthias.Zenker at erbe-
> med.com> wrote:
> >
> > Thank you!
> >
> > Does it work also with STEP data imported from CAD?
>
> Yes!
>
> >
> > Matthias
> >
> >> -----Ursprüngliche Nachricht-----
> >> Von: Christophe Geuzaine [mailto:cgeuzaine at ulg.ac.be]
> >> Gesendet: Mittwoch, 3. Mai 2017 10:34
> >> An: Zenker, Dr. Matthias
> >> Cc: andrew; gmsh at onelab.info
> >> Betreff: Re: [Gmsh] boolean partitioning
> >>
> >>
> >> Have a look at the new boolean examples, e.g.
> >>
> >> https://urldefense.proofpoint.com/v2/url?u=http-
> >>
> 3A__gitlab.onelab.info_gmsh_gmsh_blob_master_demos_boolean_comps
> >> olid.geo&d=DwIFaQ&c=7vND7vRFB1FzfxRXc-X80O-MJSZd5Q-IVyyYW-
> >>
> Ff2gY&r=3enlI3TuQDmO9BnMCnxq2Mfm4tAO6Z3_Ae1Yc57DMr4&m=2mpe
> >>
> DRom3Noibyq90RXwKUzWF1rJRcO6ZGHMbIFv5so&s=xHnc46KE5L6ugWGTfy
> >> _YoQoMQy6J3MVGy7jh30SFFLo&e=
> >> https://urldefense.proofpoint.com/v2/url?u=http-
> >>
> 3A__gitlab.onelab.info_gmsh_gmsh_blob_master_demos_boolean_comps
> >> olid2.geo&d=DwIFaQ&c=7vND7vRFB1FzfxRXc-X80O-MJSZd5Q-IVyyYW-
> >>
> Ff2gY&r=3enlI3TuQDmO9BnMCnxq2Mfm4tAO6Z3_Ae1Yc57DMr4&m=2mpe
> >>
> DRom3Noibyq90RXwKUzWF1rJRcO6ZGHMbIFv5so&s=NcLs864W46WNKIoHZ
> >> E2UBNMZprqYawTICL8jZpa7UfM&e=
> >>
> >> BooleanFragments does exactly what you need.
> >>
> >>
> >>> On 3 May 2017, at 10:14, Zenker, Dr. Matthias <Matthias.Zenker at erbe-
> >> med.com> wrote:
> >>>
> >>> Hi,
> >>>
> >>> I would also be interested in that functionality. It would resolve
> >>> the old
> >> “duplicated surfaces” problem that forced me (and others) to leave
> >> gmsh and do the meshing with Salomé, even though IMHO gmsh does a
> >> better job especially in 3D meshing – in Salomé, only netgen is
> >> available as 3D algorithm in the free version.
> >>> BTW there seems to be a macro permitting to use gmsh in Salomé, see
> >>> this post at the Salomé forum:
> >>> https://urldefense.proofpoint.com/v2/url?u=http-3A__salome-
> >> 2Dplatform.
> >>> org_forum_forum-5F12_953948027-
> >> 23494327180&d=DwIFaQ&c=7vND7vRFB1FzfxRX
> >>> c-X80O-MJSZd5Q-IVyyYW-
> >> Ff2gY&r=3enlI3TuQDmO9BnMCnxq2Mfm4tAO6Z3_Ae1Yc57D
> >>>
> >>
> Mr4&m=2mpeDRom3Noibyq90RXwKUzWF1rJRcO6ZGHMbIFv5so&s=bweZW
> >> T8PCF107y-xPl
> >>> l629T-vfFUIANxsy48ZRnkG6Q&e=
> >>> I haven’t tested it, though.
> >>> To export a geometry from Salomé to gmsh, I have sometimes had
> >>> success
> >> using brep format.
> >>>
> >>> Matthias
> >>>
> >>> Von: andrew [mailto:armitatz at gmail.com]
> >>> Gesendet: Dienstag, 2. Mai 2017 19:58
> >>> An: gmsh at onelab.info
> >>> Betreff: [Gmsh] boolean partitioning
> >>>
> >>>
> >>> hi,
> >>>
> >>> In Salome which uses the opencascade model there is a Boolean
> >>> operation
> >> called partition. With this you can create a solid from two others
> >> but with a shared face. A usage of that is the creation of meshes
> >> with internal walls in it with zero thickness aka 'baffles'. Is there
> >> a procedure in gmsh that can give the same results given that it has
> >> implemented the same opencascade model? Obviously there is a way to
> >> have such results if you give the precise geometry but sometimes it
> >> is very difficult to cut geometries and it is easier if gmsh could do that.
> >>>
> >>> Attached is an image of a mesh with internal baffles created with
> >> partitioning and the geometry that created it. I would prefer t if
> >> gmsh could do the meshing but I haven't found a way to load the
> >> geometry to gmsh from Salome.
> >>>
> >>> kind regards
> >>>
> >>> Andrew
> >>>
> >>>
> >>> Erbe Elektromedizin GmbH Firmensitz: 72072 Tuebingen
> >>> Geschaeftsfuehrer: Christian O. Erbe, Reiner Thede Registergericht:
> >>> Stuttgart HRB 380137
> >>>
> >>> _______________________________________________
> >>> gmsh mailing list
> >>> gmsh at onelab.info
> >>> https://urldefense.proofpoint.com/v2/url?u=http-
> >> 3A__onelab.info_mailma
> >>> n_listinfo_gmsh&d=DwIFaQ&c=7vND7vRFB1FzfxRXc-X80O-MJSZd5Q-
> >> IVyyYW-Ff2gY
> >>>
> >>
> &r=3enlI3TuQDmO9BnMCnxq2Mfm4tAO6Z3_Ae1Yc57DMr4&m=2mpeDRom
> >> 3Noibyq90RXwK
> >>> UzWF1rJRcO6ZGHMbIFv5so&s=1HcJ-0ygfx48c3Da61c9yCkbIwdzENB-
> >> tgduaWTphlg&e
> >>> =
> >>
> >> --
> >> Prof. Christophe Geuzaine
> >> University of Liege, Electrical Engineering and Computer Science
> >> https://urldefense.proofpoint.com/v2/url?u=http-
> >> 3A__www.montefiore.ulg.ac.be_-
> >> 7Egeuzaine&d=DwIFaQ&c=7vND7vRFB1FzfxRXc-X80O-MJSZd5Q-IVyyYW-
> >>
> Ff2gY&r=3enlI3TuQDmO9BnMCnxq2Mfm4tAO6Z3_Ae1Yc57DMr4&m=2mpe
> >>
> DRom3Noibyq90RXwKUzWF1rJRcO6ZGHMbIFv5so&s=Rsm5qmhcl3JpPSdvAti
> >> aBKbqvMhdzkyxX8uE3jKAKHE&e=
> >>
> >> Free software: https://urldefense.proofpoint.com/v2/url?u=http-
> >> 3A__gmsh.info&d=DwIFaQ&c=7vND7vRFB1FzfxRXc-X80O-MJSZd5Q-
> >> IVyyYW-
> >>
> Ff2gY&r=3enlI3TuQDmO9BnMCnxq2Mfm4tAO6Z3_Ae1Yc57DMr4&m=2mpe
> >>
> DRom3Noibyq90RXwKUzWF1rJRcO6ZGHMbIFv5so&s=5_brZJaZk840OH5gfAB
> >> Xdz5Zx3tnyWbIxZ_vyUwBPx0&e=  |
> >> https://urldefense.proofpoint.com/v2/url?u=http-
> >> 3A__getdp.info&d=DwIFaQ&c=7vND7vRFB1FzfxRXc-X80O-MJSZd5Q-
> >> IVyyYW-
> >>
> Ff2gY&r=3enlI3TuQDmO9BnMCnxq2Mfm4tAO6Z3_Ae1Yc57DMr4&m=2mpe
> >>
> DRom3Noibyq90RXwKUzWF1rJRcO6ZGHMbIFv5so&s=0o8fOH2Rmfqo2itgtsiJ
> >> b7x8fphtSImxHSJPALRPblU&e=  |
> >> https://urldefense.proofpoint.com/v2/url?u=http-
> >> 3A__onelab.info&d=DwIFaQ&c=7vND7vRFB1FzfxRXc-X80O-MJSZd5Q-
> >> IVyyYW-
> >>
> Ff2gY&r=3enlI3TuQDmO9BnMCnxq2Mfm4tAO6Z3_Ae1Yc57DMr4&m=2mpe
> >>
> DRom3Noibyq90RXwKUzWF1rJRcO6ZGHMbIFv5so&s=aINKFEeEpZBn6P7toEf
> >> THkiX9PY4exsvpqL5Sbt0HxU&e=
> >
> > ________________________________
> >
> > Erbe Elektromedizin GmbH Firmensitz: 72072 Tuebingen
> > Geschaeftsfuehrer: Christian O. Erbe, Reiner Thede Registergericht:
> > Stuttgart HRB 380137
> >
>
> --
> Prof. Christophe Geuzaine
> University of Liege, Electrical Engineering and Computer Science
> https://urldefense.proofpoint.com/v2/url?u=http-
> 3A__www.montefiore.ulg.ac.be_-
> 7Egeuzaine&d=DwIFaQ&c=7vND7vRFB1FzfxRXc-X80O-MJSZd5Q-IVyyYW-
> Ff2gY&r=3enlI3TuQDmO9BnMCnxq2Mfm4tAO6Z3_Ae1Yc57DMr4&m=8Vw_v
> _BDA0iLsUidosaASFxAyQUi0kD5fplEyshK-
> Dg&s=kwU6ytrUo2LYF3_Oer0lSXMAgo0WGCfD1w17KwXLjdY&e=
>
> Free software: https://urldefense.proofpoint.com/v2/url?u=http-
> 3A__gmsh.info&d=DwIFaQ&c=7vND7vRFB1FzfxRXc-X80O-MJSZd5Q-
> IVyyYW-
> Ff2gY&r=3enlI3TuQDmO9BnMCnxq2Mfm4tAO6Z3_Ae1Yc57DMr4&m=8Vw_v
> _BDA0iLsUidosaASFxAyQUi0kD5fplEyshK-
> Dg&s=EpHRMs0e1LKJ1Fw_fUkxiBqcwS7bPKbuD7fSD4Ayi4c&e=  |
> https://urldefense.proofpoint.com/v2/url?u=http-
> 3A__getdp.info&d=DwIFaQ&c=7vND7vRFB1FzfxRXc-X80O-MJSZd5Q-
> IVyyYW-
> Ff2gY&r=3enlI3TuQDmO9BnMCnxq2Mfm4tAO6Z3_Ae1Yc57DMr4&m=8Vw_v
> _BDA0iLsUidosaASFxAyQUi0kD5fplEyshK-
> Dg&s=aC2hdAGXYby4GiBxvBa9z0q5SD_x8dqT0GN_Rr86j7U&e=  |
> https://urldefense.proofpoint.com/v2/url?u=http-
> 3A__onelab.info&d=DwIFaQ&c=7vND7vRFB1FzfxRXc-X80O-MJSZd5Q-
> IVyyYW-
> Ff2gY&r=3enlI3TuQDmO9BnMCnxq2Mfm4tAO6Z3_Ae1Yc57DMr4&m=8Vw_v
> _BDA0iLsUidosaASFxAyQUi0kD5fplEyshK-Dg&s=wfO0A_R_Bpu8Bnpr7KsViI-
> rkX_7p9LXrSlS0cLrHvc&e=

________________________________

Erbe Elektromedizin GmbH Firmensitz: 72072 Tuebingen Geschaeftsfuehrer: Christian O. Erbe, Reiner Thede Registergericht: Stuttgart HRB 380137