[petsc-users] Getting the connectivity from DMPlex

[Matthew Knepley]

On Wed, Aug 21, 2019 at 8:21 AM Jian Zhang - 3ME <J.Zhang-10 at tudelft.nl>
wrote:

> Hi Matthew,
>
> Thanks for your answer. I just looked at the pestc4py 3.11.0 (I think it
> is the newest one).
>
> Actually, I did not find DMPlexGetClosure function in the DMPlex.pyx, also
> not in DM.pyx.
>
> Sorry, I messed up the name in my mail. Its getTransitiveClosure()


https://bitbucket.org/petsc/petsc4py/src/9598d8fb2bb0baa79f99ebf76991ddecd1fd173e/src/PETSc/DMPlex.pyx#lines-332

  Thanks,

    Matt

> Best,
>
> Jian
> ------------------------------
> *From:* Matthew Knepley <knepley at gmail.com>
> *Sent:* 21 August 2019 14:03:19
> *To:* Jian Zhang - 3ME
> *Cc:* Jed Brown; petsc-users at mcs.anl.gov
> *Subject:* Re: [petsc-users] Getting the connectivity from DMPlex
>
> On Wed, Aug 21, 2019 at 7:48 AM Jian Zhang - 3ME via petsc-users <
> petsc-users at mcs.anl.gov> wrote:
>
>> Hi Jed,
>>
>> Thank you very much. I tried to use DMPlexGetCone, but the output is the
>> edge ids, not the vertice ids. For the function DMPlexGetClosureIndices,
>> I can not find it in petsc4py. Do you know any alternative ways to solve
>> this?
>>
> DMPlexGetClosure() should be in petsc4py. It also returns orientations,
> which you can just filter out.
>
>   Thanks,
>
>      Matt
>
>
>> Best,
>>
>> Jian
>> ------------------------------
>> *From:* Jed Brown <jed at jedbrown.org>
>> *Sent:* 21 August 2019 13:42:41
>> *To:* Jian Zhang - 3ME; petsc-users at mcs.anl.gov
>> *Subject:* Re: [petsc-users] Getting the connectivity from DMPlex
>>
>> Jian Zhang - 3ME via petsc-users <petsc-users at mcs.anl.gov> writes:
>>
>> > Hi guys,
>> >
>> > I am trying to get the element connectivity from DMPlex. The input is
>> the element id, and the output should be the vertice ids. Which function
>> should I use to achieve this? Thanks in advance.
>>
>> See DMPlexGetCone or DMPlexGetClosureIndices.
>>
>
>
> --
> 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/>
>


-- 
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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