[Gmsh] independent meshing of assembly parts

Christophe Geuzaine cgeuzaine at ulg.ac.be
Wed Jun 2 09:08:25 CEST 2010

On 01/06/10 13:28, Steffè Walter wrote:
> Hello
> I would like to know if it is possible to use gmsh in the following way:
> Let us suppose that I have a collection of brep files describing a set
> of opencacscade solids.
> These parts have been imprinted all together so that adjiacent solids
> reuse the same faces.
> I would like to generate a surface mesh of each solid in an independent run.
> May I expert that the geometrical congruence of adjiacent entities will
> be preserved in the mesh.

Hi Walter - Yes, provided that you mesh all the parts together.

> I know that gmsh converts the opencascade geometery in an internal
> geometry before meshing.

No: Gmsh does *not* convert the geometry to an internal format. Gmsh 
directly accesses the underlying opencascade CAD representation.

> Is it a safe to assume that if two opencascade edges (faces) are equal
> they are converted in identical gmsh edges (faces)

Not if you mesh the entities separately, because the meshing algorithms 
are randomized.

> and then in two equal 1D (2D) meshes even in two separate runs ?
> Thanks
> walter
> _______________________________________________
> gmsh mailing list
> gmsh at geuz.org
> http://www.geuz.org/mailman/listinfo/gmsh

Prof. Christophe Geuzaine
University of Liege, Electrical Engineering and Computer Science