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

Mon Apr 24 09:18:03 EDT 2017

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:
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>> >> >> >
>> >> >> _______________________________________________
>> >> >> 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:
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>> >>
>> >> _______________________________________________
>> >> 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
>> >>
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>> >>
>> >
>> >
>> >
>> > --
>> > Ken Martin PhD
>> > Distinguished Engineer
>> > Kitware Inc.
>> > 28 Corporate Drive
>> > Clifton Park NY 12065
>> >
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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
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