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

[Patrick Sanan]

Am Mi., 3. Apr. 2019 um 21:26 Uhr schrieb Jed Brown <jed at jedbrown.org>:

> 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.
>
True - I was blinded by my own use case here.

>
> > Here's what I'd propose:  too ugly and convoluted?
> > - If the user has set any custom field names for the DMDA, interpret that
> > to mean that they want to deal with them individually, so use the old
> > behavior (but incorporate Dave's comments on improving the field names)
> > - Otherwise, assume that the user wants the new (current) behavior
> > - Document this stuff as much as possible to try to avoid confusion
>
> I think this sounds good.
>
Cool - I'll set it up.
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