[vtkusers] concept of visualizing large datasets (no ParaView)

Trevour Spencer trevourspencer at gmail.com
Fri Jun 9 12:45:59 EDT 2017

Well, thanks, that also explains my problems with the other examples, I

I have run these on a machine with Mesa 11.2.2 CPU rendering. Are there any
known problems with software rendering? I'll test with a different VTK
installation next week and try to get an idea where the bug comes from.

The example at http://www.vtk.org/Wiki/VTK/MultiPass_Rendering_With_IceT,
compiled against a ParaView 5.3.0 installation with the same Mesa runs fine
though (same result as yours).

2017-06-09 18:06 GMT+02:00 David E DeMarle <dave.demarle at kitware.com>:

> Yes it works on my end and on the dashboards: https://open.cdash.org/
> queryTests.php?project=VTK&date=2017-06-09&filtercount=1&
> showfilters=1&field1=testname&compare1=63&value1=TestParallelRendering
> From my desktop:
> [image: Inline image 1]
> David E DeMarle
> Kitware, Inc.
> Principal Engineer
> 21 Corporate Drive
> Clifton Park, NY 12065-8662
> Phone: 518-881-4909 <(518)%20881-4909>
> On Fri, Jun 9, 2017 at 12:01 PM, Trevour Spencer <trevourspencer at gmail.com
> > wrote:
>> Thank you for another suggestion. Have you run it, and does it work for
>> you?
>> I wonder, If I don't understand what you are recommending, or if my setup
>> is broken and doesn't work as expected, or if the composite renderer just
>> isn't supposed to work as I think it should.
>> I can show you the result from Rendering/Parallel/Testing/
>> Cxx/TestParallelRendering.cxx in the attachment. I started it as "mpirun
>> -n 3 ./TestParallelRendering -I" and took a screenshot of the three
>> windows. What I need is a full sphere in the first window (process 0), made
>> of the red, blue and green segments. But again, only the red part appears
>> in the first window, as in the previous examples that I have tested.
>> Please confirm, whether you have the same result.
>> Cheers
>> Trevour
>> 2017-06-09 15:19 GMT+02:00 David E DeMarle <dave.demarle at kitware.com>:
>>> Try this one then. Rendering/Parallel/Testing/Cxx
>>> /TestParallelRendering.cxx
>>> Like all tests grep "Command" in the log file to show the command line
>>> used to run it. Like most tests, this one can take a "-I" argument to make
>>> it start the interaction loop rather than rendering once and finishing.
>>> See in the test how each process uses the MPI rank to tell the
>>> polydatamapper what piece it and the pipeline behind it are responsible
>>> for. In this case the sphere source just makes its local section of the
>>> sphere mesh, but in the same way parallel aware readers know what files or
>>> data portions they are responsible for. Regardless of the pipeline, in the
>>> end the vtkCompositedSynchronizedRenderer and Window make sure that all
>>> ranks run at the same time and that, unlike in the other examples you
>>> found, the compositer depth composites the results and gathers them to rank
>>> 0 for display.
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