[MOAB-dev] DMMOAB (PETSc 3.5.1)

[Vijay S. Mahadevan]

Gerd,

I'm excited to see interest in this interface and that's one of the
reasons why we created the PETSc solver interaction in the first
place.

There is another example under KSP:
src/ksp/ksp/examples/tutorials/ex35.cxx which shows solution to a
inhomogeneous laplacian equation in 2-D. I actually used an updated
version of this example in a recent tutorial (details at
http://sigma.mcs.anl.gov/atpesc2014/) that explores FEM assembly of
the linear operator using PETSc and mesh traversal using MOAB. It also
has the DMMoabOutput function with DMMoabSetGlobalFieldVector usage.

You could also query the Interface and create tags and currently there
isn't functionality to output the user created tags also to the file,
but this should be easy to add if needed. Let me know if you have more
questions.

Vijay

On Thu, Aug 14, 2014 at 10:35 AM, Gerd Heber <gheber at hdfgroup.org> wrote:
> As a somewhat seasoned PETSc and novice MOAB user, I'm excited to see the DMMOAB
> enhancements in PETSc 3.5.1. The example in
>
> http://www.mcs.anl.gov/petsc/petsc-current/src/ts/examples/tutorials/ex30.cxx.html
>
> has some clues for the "protocol" between PETSc and MOAB objects,
> but I couldn't find an example which shows DMMoabOutput in action.
> From my simple experiments, I can see tags being created in the MOAB file,
> but I couldn't figure out how to get the tag data written.
> Is there such an example or a general description of the protocol?
>
> Thanks, G.