[Gmsh] Compsolids

Christophe Geuzaine cgeuzaine at ulg.ac.be
Sat Sep 9 23:28:45 CEST 2017

> On 7 Sep 2017, at 12:39, Jeremy Theler <jeremy at seamplex.com> wrote:
> Hi
> In demos/boolean/ there are two files named compsolid.geo and
> compsolid2.geo where OCCT's General Fuse Operator
> https://www.opencascade.com/doc/occt-7.2.0/overview/html/occt_user_guides__boolean_operations.html
> is called through Gmsh's BooleanFragments command.
> Now, even though the files are called “compsolid” the BooleanFragments
> command does not return a CompSolid, but just a Compound.
> For
> example, FreeCAD can perform a similar action with the “Boolean
> Fragments” tool
> https://www.freecadweb.org/wiki/Part_BooleanFragments
> and has an option to return either a compound or a compsolid.
> Will you guys at Gmsh also add an option to really return a compsolid
> or will this behavior be the final one?

Gmsh does not expose these concepts... Internally Gmsh uses an abstract interface to only 4 entity types: GVertex (points), GEdge (curves), GFace (surfaces) and GRegion (volumes). All the algorithms are built on these simple types. 

> Thanks
> --
> jeremy theler
> www.seamplex.com
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Prof. Christophe Geuzaine
University of Liege, Electrical Engineering and Computer Science 

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