I'll definitely consider that approach as a possibility for later work. Thanks, Bram
From: Bernd Hahnebach <[email protected]> > > > see https://www.freecadweb.org/wiki/Part_BooleanFragments > > the CompSolids greated with the tool above work great together with > GMSH to make connected multi body meshes ! > > It is even possible to invoke GMSH from within FreeCAD and make > differet mesh size or mesh groups for the different bodies, by GUI or > by python :-) > > bernd > > > Zitat von Jeremy Theler <[email protected]>: > > > Just to complete, you can also get a compsolid through a boolean > > fragment at FreeCAD. There has been a long discussion on FreeCAD's side. > > See for example first this: > > > > https://forum.freecadweb.org/viewtopic.php?t=13830 > > > > And lately this: > > > > https://forum.freecadweb.org/viewtopic.php?t=13830 > > > > -- > > Jeremy Theler > > www.seamplex.com > > > > > > > > On Sat, 2017-03-18 at 09:46 +0100, Christophe Geuzaine wrote: > >> > On 17 Mar 2017, at 23:24, Bram Sterling > >> <[email protected]> wrote: > >> > > >> > I'm trying to mesh a 3D 2-material construct created in another > >> program (FreeCAD) and brought into Gmsh by way of a BREP file. > >> After some troubleshooting downstream, I determined that Gmsh is > >> turning the two volumes into two disjoint meshes despite their > >> extensive shared surface. > >> > > >> > Poking around, I suspect the reason for this is that the two > >> volumes share no elementary geometry. Instead, the shared lines > >> and surfaces are duplicated. > >> > > >> > If the original geometry had been defined in a Geo script this > >> would seem straightforward to fix manually, but it seems a bit more > >> complicated here, especially as this is bound to come up again with > >> more complex geometry later. Is deleting the redundant geometry > >> and rebuilding other effected parts manually the best option, or is > >> there a better way? > >> > > >> > >> With a recent nightly build, create a .geo script that does the > >> following (assuming the brep contains 2 volumes): > >> > >> SetFactory("OpenCASCADE"); > >> a() = ShapeFromFile("file.brep"); > >> BooleanFragments{ Volume{a(0)}; Delete; }{ Volume{a(1)}; Delete; } > >> > >> Note that you can now directly create your CAD inside Gmsh: see > >> demos/boolean/*.geo for examples. > >> > >> Christophe > >> > >> > >> > > >> > Thank you, > >> > Bram Sterling > >> > _______________________________________________ > >> > gmsh mailing list > >> > [email protected] > >> > http://onelab.info/mailman/listinfo/gmsh > >> > > > > > > _______________________________________________ > > gmsh mailing list > > [email protected] > > http://onelab.info/mailman/listinfo/gmsh > > > > > > > > > > ------------------------------ > > Subject: Digest Footer > > _______________________________________________ > gmsh mailing list > [email protected] > http://onelab.info/mailman/listinfo/gmsh > > > ------------------------------ > > End of gmsh Digest, Vol 170, Issue 26 > ************************************* >
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