[petsc-dev] DMDA VTK viewer regression: field names missing

[Matthew Knepley]

On Thu, Apr 4, 2019 at 12:43 PM Jed Brown <jed at jedbrown.org> wrote:

> Matthew Knepley <knepley at gmail.com> writes:
>
> > On Thu, Apr 4, 2019 at 11:52 AM Jed Brown <jed at jedbrown.org> wrote:
> >
> >> Matthew Knepley <knepley at gmail.com> writes:
> >>
> >> > On Thu, Apr 4, 2019 at 12:26 AM Jed Brown via petsc-dev <
> >> > petsc-dev at mcs.anl.gov> wrote:
> >> >
> >> >> Patrick Sanan via petsc-dev <petsc-dev at mcs.anl.gov> writes:
> >> >>
> >> >> > I was going to say something similar to Matt; to me it is worth the
> >> 1.5x
> >> >> > redundancy in the data if I can just view the output file with
> "doing
> >> >> > anything special". I have also done something similar to what
> you're
> >> >> > describing with save states, and it works fine; weirdly it seems
> like
> >> >> much
> >> >> > higher overhead than it is, though.
> >> >>
> >> >> That overhead for 2D fields isn't a big deal for me, but how would
> you
> >> >> identify that three components should be interpreted as vectors?
> What
> >> >> if they are three chemical concentrations?  Plotting as vectors would
> >> >> just be confusing in that case.
> >> >>
> >> >
> >> > In PyLith, we annotate solution fields with transformation properties
> >> like
> >> > this.
> >>
> >> How do you "annotate" in a VTK file?
> >>
> >
> > My intention was to have them annotated in the library, and then we
> > only generate VTK vectors for true vectors. For other fields we make a
> > bunch of scalars.
>
> This could map to your fields/components concept in Plex, but we don't
> presently have that distinction in DMDA.
>

Yep, I am aware. I mentioned the PyLith methodology because I think its a
possible
avenue for the future.

   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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