[Paraview] CoProcessing

[Andy Bauer]

Hi Jacques,

There is a polyhedra cell type in VTK now --
http://www.vtk.org/doc/nightly/html/classvtkPolyhedron.html
As far as I know it works with all of the proper filters but since I haven't
tried it yet I won't promise that.  The good news is that Will Schroeder had
a high interest in it and probably worked on some of it so I'd assume that
it's working quite well right now.

As for Phasta, it does run in parallel (as props to their developers it was
a finalist for the 2009 Gordon Bell prize).  The grid is already partitioned
and each process runs the adaptor and creates an unstructured grid from its
portion of the partitioned mesh.  Thus, there isn't any need for mpi calls
in the adaptor code.  If you had ghost cell information in your partitioned
mesh and wanted to get fancy you should be able to add that to your
partitioned grid to make some of the filters faster but I haven't tried
that.

Andy

On Wed, Aug 4, 2010 at 11:58 AM, Jacques Papper <jacques.papper at gmail.com>wrote:

> Thanks a lot Andy, Takuya,
>
> I'm using the PhastaAdaptor, and the FortranAdaptorAPI as a guide for the
> moment.
> I know there were talks of getting POLYHEDRAL cell support in VTK. Do you
> know if this is there yet?
> My dataset is multiregion unstructured polyhedral mesh domain decomposed
> amongst each processor.
>
> Is the Phasta code parallelized ? If so, I do not see any MPI statements in
> the adaptor code ?
>
> Jacques
>
> 2010/8/4 Andy Bauer <andy.bauer at kitware.com>
>
> Hi Jacques,
>>
>> What type of data set do you have?  Even though the PHASTA adaptor (
>> ParaView/CoProcessing/Adaptors/FortranAdaptors/PhastaAdaptor) is for fortran
>> code it may give you an idea.  Also stepping through the example in
>> ParaView/CoProcessing/CoProcessor/Testing/Cxx/PythonScriptCoProcessingExample.cxx
>> may help as well.
>>
>> I'll spend some time this week putting up a skeleton of a simulation code
>> on the coprocessing wiki that should hopefully be easier to follow.  I'll
>> let you know when it's done.
>>
>> Andy
>>
>> On Wed, Aug 4, 2010 at 8:02 AM, Jacques Papper <jacques.papper at gmail.com>wrote:
>>
>>>  Hi All,
>>>
>>> Sorry for my last post, I figured out that I had wrongly set my
>>> PYTHONPATH..
>>> All the tests work ok now. Still interested in CoProcessing adaptors
>>> examples though :)
>>>
>>> Thanks
>>> Jacques
>>>
>>> 2010/8/4 Jacques Papper <jacques.papper at gmail.com>
>>>
>>>
>>>> Hi All,
>>>>
>>>> I'm starting to look into the ParaView CoProcessing libraries.
>>>> I just pulled from git today, and compiled it all up following the
>>>> guidelines in :
>>>> http://www.paraview.org/Wiki/CoProcessing
>>>> I didn't find :
>>>> *BUILD_PYTHON_COPROCESSING_ADAPTOR
>>>> *but instead :
>>>> PARAVIEW_BUILD_PLUGIN_CoProcessingScriptGenerator
>>>> anyway the compilation went through without any issues.
>>>> I then tried :
>>>>
>>>> ctest -R CoProcessing
>>>> Test project /users/boreas01/jacques/PARAVIEW/ParaView-bin
>>>>     Start 491: CoProcessingTestPythonScript
>>>> 1/3 Test #491: CoProcessingTestPythonScript ...........   Passed    0.45
>>>> sec
>>>>     Start 492: CoProcessingPythonScriptGridPlot
>>>> 2/3 Test #492: CoProcessingPythonScriptGridPlot .......***Failed    0.09
>>>> sec
>>>>     Start 493: CoProcessingPythonScriptPressurePlot
>>>> 3/3 Test #493: CoProcessingPythonScriptPressurePlot ...***Failed    0.09
>>>> sec
>>>>
>>>> 33% tests passed, 2 tests failed out of 3
>>>>
>>>> Total Test time (real) =   0.68 sec
>>>>
>>>> The following tests FAILED:
>>>>         492 - CoProcessingPythonScriptGridPlot (Failed)
>>>>         493 - CoProcessingPythonScriptPressurePlot (Failed)
>>>> Errors while running CTest
>>>>
>>>> Is this a problem in my current installation or on the master branch ?
>>>>
>>>> Finally, I would like to start writing an adaptor to a C++ parallelised
>>>> code. Can you tell me what is the closest code I can inspire myself from ?
>>>>
>>>>
>>>> Thank you,
>>>> Jacques
>>>>
>>>>
>>>> PS sorry mixed up the subjects..
>>>>
>>>
>>>
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