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

Trevour Spencer trevourspencer at gmail.com
Fri Jun 9 12:01:06 EDT 2017

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
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.


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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