[petsc-users] DMPlex: vtk/vtu support for labels

[Matthew Knepley]

On Fri, Mar 26, 2021 at 11:43 AM Jed Brown <jed at jedbrown.org> wrote:

> Cameron Smith <smithc11 at rpi.edu> writes:
>
> > Hello,
> >
> > I'm debugging our use of DMLabel to mark the mesh vertices in a 2d
> > triangular mesh on the geometric model boundary.
> >
> >  From what I understand, the latex/tikz and glvis viewers support
> > rendering user labels via the following options:
> >
> > tikz:
> > -dm_view :mesh.tex:ascii_latex
> > -dm_plex_view_scale 8.0  #not related to label, better formatting
> > -dm_plex_view_labels <userDMLabelStrings>
> >
> > glvis (I have not tried this yet):
> > -viewer_glvis_dm_plex_bmarker <userDMLabelStrings>
> >
> > Are there any other graphical viewers that support rendering the
> > existence and/or value of DMLabel?  I'm most familiar with paraview but
> > didn't see vtu/vtk support in dm/impls/plex/plex[vtu].c .
>
> I think it would be good to include labels. Is there a more efficient way
> to do it than to lower labels to an integer-valued field over the entire
> mesh with some default value inserted for unlabeled points?
>

Last time I looked at the XDMF standard, I did not see something, but maybe
that was too long ago. I did this kind of automatic
integer field thing with 'rank', so doing it with a label is trivial, but
it would be nice if it were more integrated on the platform.

   Matt

-- 
What most experimenters take for granted before they begin their
experiments is infinitely more interesting than any results to which their
experiments lead.
-- Norbert Wiener

https://www.cse.buffalo.edu/~knepley/ <http://www.cse.buffalo.edu/~knepley/>
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