[vtkusers] VTK/OpenGL2 application over VirtualGL/TurboVNC?

Mon Apr 24 09:45:54 EDT 2017

2017-04-24 15:32 GMT+02:00 Ken Martin <ken.martin at kitware.com>:
> I believe for Qt5 you should be using the new QVTKOpenGLWidget that was
> recently written. From what I understand the old QVTKWidget has some issues
> with Qt5. So that might be worth looking into. I believe that is what
> ParaView uses now.

Ah yes, it's on our TODO to try out the new QVTKOpenGLWidget. At the
moment we have our own .deb packaged VTK 7.1.1, but will try out the
new widget once we're on a version that has it.

Let's hope that magically solves the problem.

Robert: You mentioned ParaView running without problems. Do you know
if that was with a version that uses Qt 4 or 5, and if 5, if it uses
the new QVTKOpenGLWidget or not?

Elvis

>
> On Mon, Apr 24, 2017 at 9:18 AM, Elvis Stansvik
> <elvis.stansvik at orexplore.com> wrote:
>>
>> 2017-04-24 15:00 GMT+02:00 Ken Martin <ken.martin at kitware.com>:
>> > And you ran it over virtualGL/TurboVNC?
>>
>> Yep. See attached screenshot. This was when I ran
>>
>>     vglrun bin/vtkRenderingOpenGL2CxxTests TestVBOPLYMapper -D
>> ExternalData/Testing -I
>>
>> in a TurboVNC session from my own laptop to the server machine.
>>
>> Out of curiosity, since we're using Qt 5 in our application, I tried
>> running the QVTKRenderWindowInteractor.py script, as a quick test, and
>> it gives the same error as when running our app:
>>
>> ERROR: In
>> /buildbot/vtk7-builder/build/Rendering/OpenGL2/vtkOpenGLRenderWindow.cxx,
>> line 628
>> vtkXOpenGLRenderWindow (0x25e1670): GLEW could not be initialized.
>>
>> So maybe the problem is related to Qt 5 + VTK somehow?
>>
>> In our application (C++), we use a custom QVTKWidget subclass. I'll
>> try to make a minimal test case that uses our custom class, but
>> QVTKRenderWindowInteractor.py exhibiting the same problem seems to
>> suggest it might be related to Qt + VTK.
>>
>> I also verified that the SmartVolumeMapper example works fine, even
>> when modified to use the vtkGPUVolumeRayCastMapper instead (which is
>> what we're using).
>>
>> Elvis
>>
>> >
>> > You can run it with -I added on if you want it to stay up so you can
>> > interact with it
>> >
>> > vtkRenderingOpenGL2CxxTests TestVBOPLYMapper -D ExternalData\Testing -I
>> >
>> >
>> >
>> > On Mon, Apr 24, 2017 at 8:57 AM, Elvis Stansvik
>> > <elvis.stansvik at orexplore.com> wrote:
>> >>
>> >> 2017-04-24 14:10 GMT+02:00 Ken Martin <ken.martin at kitware.com>:
>> >> > Elvis, could you try running the following test?
>> >> >
>> >> > ctest -R VBOPLY -VV
>> >> >
>> >> > or explicitly as
>> >> >
>> >> > vtkRenderingOpenGL2CxxTests TestVBOPLYMapper -D ExternalData\Testing
>> >> >
>> >> > and send me the output? That test checks for OpenGL2 support and
>> >> > prints
>> >> > out
>> >> > an error message if it fails to get a valid context.
>> >>
>> >> Everything seems fine. The output is
>> >>
>> >> first render time: 0.381111
>> >> opengl version 4.5
>> >> interactive render time: 0.0321125
>> >> number of triangles: 871414
>> >> triangles per second: 2.71363e+07
>> >>
>> >> and I could see the dragon render quickly before disappearing.
>> >>
>> >> I'll try to cook up a minimal example that sets up a volume rendering
>> >> pipeline similar to what I have in our application, and try to
>> >> reproduce the problem I get there.
>> >>
>> >> Elvis
>> >>
>> >> >
>> >> > Thanks!
>> >> > Ken
>> >> >
>> >> >
>> >> >
>> >> >
>> >> >
>> >> >
>> >> > On Mon, Apr 24, 2017 at 7:50 AM, Elvis Stansvik
>> >> > <elvis.stansvik at orexplore.com> wrote:
>> >> >>
>> >> >> 2017-04-24 13:35 GMT+02:00 Andreas Buykx <A.Buykx at dianafea.com>:
>> >> >> > We have been busy trying to get OpenGL2 to work on our linux
>> >> >> > backend
>> >> >> > machines using TigerVNC and we needed to build our own mesa to get
>> >> >> > the
>> >> >> > OpenGL support required by the VTK OpenGL2 layer. I'm not sure
>> >> >> > what
>> >> >> > version
>> >> >> > of mesa was required, my colleague who worked on this is on
>> >> >> > holiday.
>> >> >> > So far
>> >> >> > the transition to VTK OpenGL2  is in an experimental stage, we
>> >> >> > will
>> >> >> > probably
>> >> >> > not roll it out until after our next release. We are very
>> >> >> > interested
>> >> >> > in
>> >> >> > exchanging experiences though...
>> >> >>
>> >> >> Alright. My quick test server was a Thinkpad T460p laptop with
>> >> >> NVIDIA
>> >> >> proprietary driver, so not using Mesa. The laptop is running Ubuntu
>> >> >> 16.04.
>> >> >>
>> >> >> I followed pretty much the instructions at
>> >> >> https://github.com/aancel/admin/wiki/VirtualGL-on-Ubuntu to set it
>> >> >> up.
>> >> >>
>> >> >> I'm attaching the output I get from `vglrun glxinfo` in a terminal
>> >> >> when connected to the server. It looks good to me.
>> >> >>
>> >> >> The result when trying to run our VTK application is
>> >> >>
>> >> >> ERROR: In
>> >> >>
>> >> >>
>> >> >> /buildbot/vtk7-builder/build/Rendering/OpenGL2/vtkOpenGLRenderWindow.cxx,
>> >> >> line 628
>> >> >> vtkXOpenGLRenderWindow (0x94e5e0): GLEW could not be initialized.
>> >> >>
>> >> >> followed by a segmentation fault.
>> >> >>
>> >> >> This is with VTK 7.1.1, configured with the OpenGL2 backend.
>> >> >>
>> >> >> I'm attaching the backtrace (I had to modify the /usr/bin/vglrun
>> >> >> script to run gdb in order to get it).
>> >> >>
>> >> >> I assume I would get the same problem with a minimal VTK example,
>> >> >> but
>> >> >> have yet to try this.
>> >> >>
>> >> >> Cheers,
>> >> >> Elvis
>> >> >>
>> >> >> >
>> >> >> > Kind regards,
>> >> >> > Andreas
>> >> >> >
>> >> >> >> -----Original Message-----
>> >> >> >> From: vtkusers [mailto:vtkusers-bounces at vtk.org] On Behalf Of
>> >> >> >> Elvis
>> >> >> >> Stansvik
>> >> >> >> Sent: Monday, April 24, 2017 1:12 PM
>> >> >> >> To: Róbert Špir
>> >> >> >> Cc: VTK Users
>> >> >> >> Subject: Re: [vtkusers] VTK/OpenGL2 application over
>> >> >> >> VirtualGL/TurboVNC?
>> >> >> >>
>> >> >> >> 2017-04-24 12:53 GMT+02:00 Róbert Špir <spir.robert at gmail.com>:
>> >> >> >> > Hi Elvis,
>> >> >> >> > I tried it without success, but paraview runs without problems,
>> >> >> >> > so
>> >> >> >> > there's got to be some way...
>> >> >> >>
>> >> >> >> Ah, that's an interesting piece of info.
>> >> >> >>
>> >> >> >> Perhaps there's some ParaView dev here who knows what might set
>> >> >> >> ParaView apart in this context?
>> >> >> >>
>> >> >> >> Elvis
>> >> >> >>
>> >> >> >> >
>> >> >> >> > Robert
>> >> >> >> >
>> >> >> >> > -----Original Message-----
>> >> >> >> > From: vtkusers [mailto:vtkusers-bounces at vtk.org] On Behalf Of
>> >> >> >> > Elvis
>> >> >> >> > Stansvik
>> >> >> >> > Sent: Monday, April 24, 2017 12:51 PM
>> >> >> >> > To: VTK Users <vtkusers at vtk.org>
>> >> >> >> > Subject: [vtkusers] VTK/OpenGL2 application over
>> >> >> >> > VirtualGL/TurboVNC?
>> >> >> >> >
>> >> >> >> > Has anyone successfully run a VTK application using the OpenGL2
>> >> >> >> > backend over VirtualGL/TurboVNC?
>> >> >> >> >
>> >> >> >> > GLEW fails to initialize when I try to run the application
>> >> >> >> > using
>> >> >> >> > vglrun. I'm ready to give up, since this was just a casual
>> >> >> >> > experiment,
>> >> >> >> > but I thought I'd ask first if anyone has it running. The
>> >> >> >> > output
>> >> >> >> > from
>> >> >> >> > `vglrun glxinfo` looks good to me.
>> >> >> >> >
>> >> >> >> > Elvis
>> >> >> >> > _______________________________________________
>> >> >> >> > Powered by www.kitware.com
>> >> >> >> >
>> >> >> >> > Visit other Kitware open-source projects at
>> >> >> >> > http://www.kitware.com/opensource/opensource.html
>> >> >> >> >
>> >> >> >> > Please keep messages on-topic and check the VTK FAQ at:
>> >> >> >> > http://www.vtk.org/Wiki/VTK_FAQ
>> >> >> >> >
>> >> >> >> > Search the list archives at:
>> >> >> >> > http://markmail.org/search/?q=vtkusers
>> >> >> >> >
>> >> >> >> > Follow this link to subscribe/unsubscribe:
>> >> >> >> > http://public.kitware.com/mailman/listinfo/vtkusers
>> >> >> >> >
>> >> >> >> _______________________________________________
>> >> >> >> Powered by www.kitware.com
>> >> >> >>
>> >> >> >> Visit other Kitware open-source projects at
>> >> >> >> http://www.kitware.com/opensource/opensource.html
>> >> >> >>
>> >> >> >> Please keep messages on-topic and check the VTK FAQ at:
>> >> >> >> http://www.vtk.org/Wiki/VTK_FAQ
>> >> >> >>
>> >> >> >> Search the list archives at:
>> >> >> >> http://markmail.org/search/?q=vtkusers
>> >> >> >>
>> >> >> >> Follow this link to subscribe/unsubscribe:
>> >> >> >> http://public.kitware.com/mailman/listinfo/vtkusers
>> >> >>
>> >> >> _______________________________________________
>> >> >> Powered by www.kitware.com
>> >> >>
>> >> >> Visit other Kitware open-source projects at
>> >> >> http://www.kitware.com/opensource/opensource.html
>> >> >>
>> >> >> Please keep messages on-topic and check the VTK FAQ at:
>> >> >> http://www.vtk.org/Wiki/VTK_FAQ
>> >> >>
>> >> >> Search the list archives at: http://markmail.org/search/?q=vtkusers
>> >> >>
>> >> >> Follow this link to subscribe/unsubscribe:
>> >> >> http://public.kitware.com/mailman/listinfo/vtkusers
>> >> >>
>> >> >
>> >> >
>> >> >
>> >> > --
>> >> > Ken Martin PhD
>> >> > Distinguished Engineer
>> >> > Kitware Inc.
>> >> > 28 Corporate Drive
>> >> > Clifton Park NY 12065
>> >> >
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>> >> > and
>> >> > legally privileged information, and it is intended only for the use
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>> >> > the
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>> >> > you
>> >> > received this communication in error please notify us immediately and
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>> >
>> >
>> >
>> >
>> > --
>> > Ken Martin PhD
>> > Distinguished Engineer
>> > Kitware Inc.
>> > 28 Corporate Drive
>> > Clifton Park NY 12065
>> >
>> > This communication, including all attachments, contains confidential and
>> > legally privileged information, and it is intended only for the use of
>> > the
>> > addressee.  Access to this email by anyone else is unauthorized. If you
>> > are
>> > not the intended recipient, any disclosure, copying, distribution or any
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>
>
>
>
> --
> Ken Martin PhD
> Distinguished Engineer
> Kitware Inc.
> 28 Corporate Drive
> Clifton Park NY 12065
>
> This communication, including all attachments, contains confidential and
> legally privileged information, and it is intended only for the use of the
> addressee.  Access to this email by anyone else is unauthorized. If you are
> not the intended recipient, any disclosure, copying, distribution or any
> action taken in reliance on it is prohibited and may be unlawful. If you
> received this communication in error please notify us immediately and
> destroy the original message.  Thank you.