[Paraview] Tiled Display Stereo Visualization

[Andrés Felipe Padilla]

Hi Simon,
Yeah, there is documentation on ParaView running on tiled display mode. You
can read old posts in the mailing list regarding the topic or read the
instructions in this site (https://visualization.hpc.mil/wiki/*Paraview*_*
Tiled*-*Display*_Mode). It seems like the site is currently off line, but
you can still read it on Google's cache.

We use a rendering cluster where each node gets one of the tiles, so we are
using distributed rendering. Basically, what you do for setting up the tiled
display mode is running pvserver in parallel mode (using MPI, you have to
compile ParaView from source in order to enable MPI support) in the
following way:

mpirun -np XX --hostfile PATH_TO_HOSTFILE /bin/env DISPLAY=:0 pvserver
--server-port=PORT -tdx=xTiles -tdy=yTiles

where XX is the number of processors that you are going to use to run
pvserver, PORT is the port number you want to use to bind the server, xTiles
is the number of screens you are going to use in the X dimension, and yTiles
is the number of screens you are going to use in the Y dimension. For
example, for a 3 * 2 tile screen you will use -tdx=3 and -tdy=2

You have to remember two things when you are configuring such a setup.
First, you have to configure the xhost in each participant computer to
receive incoming connections from the other computers in the visualization
cluster, otherwise the setup will not show anything. Second, you have to
configure a hostfile where each node gets one screen in the correct order.
For example, for the previous configuration I would use something like this:

192.168.85.6 slots=1
192.168.85.4 slots=1
192.168.85.2 slots=1
192.168.85.5 slots=1
192.168.85.3 slots=1
192.168.85.1 slots=1

That would be the hosts file. It is organized in such a way that the first
computer (192.168.85.6) gets the upper left display, while the last computer
gets the bottom right display. It is better explained in the previous link,
so please have a look at that site.

In the other hand, I don't know if pvserver supports stereo. How is your
stereo visualization setup? Did you connect to a server or did you use the
paraview client directly without connecting to a server?

Thanks a lot for your help.

Best Regards,
Andrés Padilla
Universidad de los Andes, Graduate Student

2009/5/19 Simon Su <newsgroup4ssu at gmail.com>

> Hi Andrés,
>
> So you have paraview running in your tile display with -tdx and -tdy
> options? are they documentation on this? Can you point me to it? Thanks.
> Does it do distributed rendering (each cluster node is responsible for
> reading the data and rendering the portion of the whole rendered dataset
> (resulting image))  or is it just one big machine doing all the rendering
> and then the rendered image got split and display on the machine running the
> tile display.
>
> On stereo issue, we have used paraview version 2.6 with modification that
> we did by one of my ex-colleague. I am not sure about the stereo option in
> the newer version of paraview. Active stereo for Paraview Version 2.6 worked
> flawlessly on our SGI prism system. I can send you the source code of
> paraview 2.6 with stereo modification that you can compile yourself if you
> like. From what I heard from my ex-colleague, the changes never got made to
> the repository.
>
> Cheers
> Simon
> p/s: please use my simonmssu at gmail.com account when reply.
>
>
> 2009/5/19 Andrés Felipe Padilla <anfeken at gmail.com>
>
>> Hello all,
>>
>> I'm working with paraview and a tiled display. We have configured the
>> tiled display visualization using -tdx and -tdy without problems, but we are
>> wondering how to configure our tiled display with stereo support. We have
>> read that you change some lines in the ParaView code in order to support
>> stereo, and then run paraview with the --stereo option, but we have not
>> found such an option in pvserver. Is there any way to configure the pvserver
>> with tiled display and stereo support? Thanks a lot in advance for your
>> help.
>>
>>
>> --------------------
>> Andrés Padilla
>> Universidad de los Andes, Graduate Student.
>>
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>
> --
> Simon Su
> Visualization Analyst
> PICSciE
> Princeton University
> 345 Peter B. Lewis Library
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> email: simonsu at princeton.edu
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