Hi Christophe,I agree that saving the cad geometry to a .geo file it is not the
way to go but at least the surface numbers don't change on reload ;-)I have
some other cad geometry where I don't get this problem, which is why perhaps
you haven't seen it? have you any other suggestions I could try?RegardsMark
From: Christophe Geuzaine <[email protected]>
To: Mark Smith <[email protected]>
Cc: "[email protected]" <[email protected]>
Sent: Thursday, January 29, 2015 11:19 AM
Subject: Re: [Gmsh] GMSH renumbers elemntaty tags on reload
> On 29 Jan 2015, at 10:45, Mark Smith <[email protected]> wrote:
>
> Hi Christophe,
> Unfortunately it makes no difference ;-(
> I used cadexchanger from http://www.cadexchanger.com/ to convert the step
> file into a .brep file but this suffers with the same problem.
> If is do file: save as and type say file2.geo and with the GEO options box
> "save physical group lables" ONLY ticked I get a file with all the points,
> lines line loops etc. When I lad this the element tag numbers stay fixed, (
> it is relatively simple geometry consisting of volumes bounded by plane
> surfaces) but I cannot get the surfaces to be filled (rendered) but only
> crossed faces even when I set
Mark - Do not save your .brep/.step as a .geo! Gmsh is designed to work
directly with the native files - "translating" them to .geo is only there for
very specific uses or debugging purposes: the .geo CAD kernel is far too
rudimentary to handle all the complexities of .step/.brep
> Geometry.SurfaceType = 2 this makes it difficult to pick surfaces to put
> into surface physical groups infact changing Geometry.SurfaceType to 0 1 or 2
> make no difference to the way the surfaces are displayed?
> Strangely if I load in my cad geometry file Merge "file.STEP"; etc then the
> surfaces displayed are as expected if one changes the setting of
> Geometry.SurfaceType, any ideas?
>
> Thanks in advance.
> Best regards
> Mark
>
>
> From: Christophe Geuzaine <[email protected]>
> To: Mark Smith <[email protected]>
> Cc: "[email protected]" <[email protected]>
> Sent: Wednesday, January 28, 2015 7:11 PM
> Subject: Re: [Gmsh] GMSH renumbers elemntaty tags on reload
>
>
> > On 28 Jan 2015, at 15:36, Mark Smith <[email protected]> wrote:
> >
> >
> > Gmsh version 2.8.5
> >
> > Hi, I load a step file generated in solidworks saved in AP203 or AP214
> > format and load in into GMSH using a .geo file with the following lines
> >
> > // in gmsh options-geometry make sure the "cut and merge faces" is checked
> > // to remove duplicate entities on import of STEP file
> > Merge "file.STEP";
> > Geometry.AutoCoherence = 1;
> > Coherence;
> >
> > in the options:geometry I get the model to display the surface labels with
> > their elementary tags number, if I hit reload the tag numbers change this
> > make defining physical surfaces impossible since the surfaces shown in the
> > surface physical groups keep changing;-(
> > I have not had this behaviour before and at this moment it is a show
> > stopper, is there a way of preventing this behaviour?
> >
>
> I don't see this behavior when I do the same thing over here (note that
> "Geometry.AutoCoherence = 1; Coherence;" will have no effect on your STEP
> data)... Does adding "Delete All;" before the "Merge" command help?
>
>
>
>
>
> > Thanks in advance
> > Mark
>
> >
> >
> > _______________________________________________
> > gmsh mailing list
> > [email protected]
> > http://www.geuz.org/mailman/listinfo/gmsh
>
> --
> Prof. Christophe Geuzaine
> University of Liege, Electrical Engineering and Computer Science
> http://www.montefiore.ulg.ac.be/~geuzaine
>
>
>
>
>
--
Prof. Christophe Geuzaine
University of Liege, Electrical Engineering and Computer Science
http://www.montefiore.ulg.ac.be/~geuzaine
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