[Paraview-developers] Changing ParaView default CMake variable values

Tue Aug 30 09:00:13 EDT 2016

It is a little tricky as I think the answer is a combination of your
hardware and your software. I'm not the best Linux person around so maybe
someone else has a better answer. From a live system point of view I
believe glxinfo will report the GL_VERSION your system supports. So
anything 3.2 or later should be good for your default OpenGL. OSMesa is I
think a bit different as I do not think glxinfo picks that up.

I have seen good results with the nvidia linux drivers on hardware from the
past 5 years.

One other gotcha that has bitten us, is that there is an SGI patent that
impacts Mesa's support for floating point textures. So some distros ship a
version of Mesa that does not include floating point textures. This can
cause issues depending on what you are rendering.

Hope that helps
Ken

On Mon, Aug 29, 2016 at 11:36 AM, Schlottke-Lakemper, Michael <
m.schlottke-lakemper at aia.rwth-aachen.de> wrote:

> Hi Ken,
>
> Thanks for your reply. This is going to be an issue for us (as expected),
> as a quick check reveals that we use an older Version of OS Mesa on our
> cluster (of course, this can and will be changed eventually). Do you know
> if there an easy way to check if my hardware/Linux distro supports OpenGL
> 3.2 (we are using openSUSE)?
>
> Yours
>
> Michael
>
> On 24 Aug 2016, at 16:19 , Ken Martin <ken.martin at kitware.com> wrote:
>
> I have a OpenGL2 document I try to keep up to date here
>
> https://docs.google.com/document/d/1ojY_20mQbRyCfmgxe-
> LuPKi82x3XwPlU_KfFLeJoBvo/edit#heading=h.a92mikls63mw
>
> I could probably be expanded some. The section on compatibility is
> currently as follows:
>
>
> The new OpenGL2 backend typically requires OpenGL 3.2. Most hardware from
> 2010 or later should support OpenGL 3.2. For Linux systems that lack
> hardware support for OpenGL3.2, Mesa version 10.5.5 and later has been
> shown to work with VTK. OS Mesa requires version 11.2.
>
> Apple Mac Pro with AMD Graphics Chips - there is/was a bug in some ATI
> drivers that causes picking and cell coloring to fail as of March 19th
> 2015. We have coded a workaround for the bug but it does impact performance
> significantly on Apple systems with AMD hardware. We have worked with Apple
> to fix the bug in El Capitan for most AMD cards they use.
>
> Windows remote desktop only supports OpenGL version 1.4, the new backend
> will not work with this. Other options like VNC and nomachine should work.
>
> Windows computers that DO NOT have an NVidia or AMD GPU will rely on their
> Intel GPU if present. Desktop and laptop Intel CPUs from IvyBridge (early
> 2012) or later should be fine as long as your drivers are up to date. Most
> Intel Xeon CPUs lack a GPU and some workstation CPUs (6 cores or more) do
> as well. In those cases you would need a dedicated GPU.
>
>
> On Wed, Aug 24, 2016 at 9:36 AM, Schlottke-Lakemper, Michael <
> m.schlottke-lakemper at aia.rwth-aachen.de> wrote:
>
>> Hi Utkarsh,
>>
>> Especially with the first change (rendering backend upgraded to OpenGL2)
>> I suspect that some users might have builds fail because of missing
>> dependencies on older systems (at least I expect it for some of our
>> systems). Is there somewhere a list of library prerequisites that will
>> change with this switch? I only know of http://www.paraview.org/Wik
>> i/ParaView:Build_And_Install and there no OpenGL dependencies are listed
>> explicitly.
>>
>> Regards,
>>
>> Michael
>>
>>
>> --
>> Michael Schlottke-Lakemper
>>
>> Institute of Aerodynamics and Chair of Fluid Mechanics
>> RWTH Aachen University
>> Wüllnerstraße 5a
>> 52062 Aachen
>> Germany
>>
>> Phone: +49 (241) 80 95188
>> Fax: +49 (241) 80 92257
>> Mail: m.schlottke-lakemper at aia.rwth-aachen.de
>> Web: http://www.aia.rwth-aachen.de
>>
>> On 24 Aug 2016, at 15:09 , Utkarsh Ayachit <utkarsh.ayachit at kitware.com>
>> wrote:
>>
>> Folks,
>>
>> I wanted to propose changing the defaults for the following CMake
>> variables in ParaView:
>>
>> VTK_RENDERING_BACKEND = OpenGL2 (currently OpenGL1)
>> VTK_ENABLE_KITS = ON (currently OFF)
>>
>> The former will use the new rendering backend. The latter will build
>> fewer libraries since multiple VTK modules gets built as a single kit
>> library.
>>
>> Thoughts? Any other suggestions?
>>
>> Utkarsh
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>
>
> --
> Ken Martin PhD
> Chairman & CFO
> Kitware Inc.
> 28 Corporate Drive
> Clifton Park NY 12065
> 518 371 3971
>
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-- 
Ken Martin PhD
Chairman & CFO
Kitware Inc.
28 Corporate Drive
Clifton Park NY 12065
518 371 3971

This communication, including all attachments, contains confidential and
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