[Paraview] Differences between OpenGL and OpenGL2 versions of ParaView

Fri Aug 7 13:53:17 EDT 2015

Awesome!  Thanks -- Adam

On Friday, August 7, 2015, Utkarsh Ayachit <utkarsh.ayachit at kitware.com>
wrote:

> Adam,
>
> The problem is that the OpenGL2 implementation doesn't work correctly for
> field-data arrays yet.
> I've reported a bug: http://www.paraview.org/Bug/view.php?id=15627
>
> We'll have in tracked down soon.
>
> Utkarsh
>
> On Mon, Aug 3, 2015 at 2:59 PM, Adam Lyon <lyon at fnal.gov
> <javascript:_e(%7B%7D,'cvml','lyon at fnal.gov');>> wrote:
>
>> Hi Joachim, Do you want me to send in a bug report for these problems? I
>> assume there's no work-around that I can do to make things work. Using
>> OpenGL2 is quite a bit faster, so I'm hoping a fix can come out soon.
>> Thanks! -- Adam
>>
>> *------*
>>
>> *Adam L. Lyon*
>> *Scientist; Associate Division Head for Systems for Scientific
>> Applications*
>>
>> Scientific Computing Division & Muon g-2 Experiment
>> Fermi National Accelerator Laboratory
>> 630 840 5522 office
>> www.fnal.gov
>> lyon at fnal.gov <javascript:_e(%7B%7D,'cvml','lyon at fnal.gov');>
>>
>> Connect with us!
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>>
>> On Fri, Jul 31, 2015 at 10:53 AM, Adam L Lyon <lyon at fnal.gov
>> <javascript:_e(%7B%7D,'cvml','lyon at fnal.gov');>> wrote:
>>
>>> Hi Joachim - Yes, I noticed that the default color is now
>>> vtkBlockColors. However I changed that to the "color" vector in my data and
>>> that change was not honored by the program. Thanks, Adam
>>>
>>> *------*
>>>
>>> *Adam L. Lyon*
>>> *Scientist; Associate Division Head for Systems for Scientific
>>> Applications*
>>>
>>> Scientific Computing Division & Muon g-2 Experiment
>>> Fermi National Accelerator Laboratory
>>> 630 840 5522 office
>>> www.fnal.gov
>>> lyon at fnal.gov <javascript:_e(%7B%7D,'cvml','lyon at fnal.gov');>
>>>
>>> Connect with us!
>>> Newsletter <http://www.fnal.gov/pub/today/>  |  Facebook
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>>> <https://twitter.com/Fermilab>
>>>
>>> On Fri, Jul 31, 2015 at 2:41 AM, Joachim Pouderoux <
>>> joachim.pouderoux at kitware.com
>>> <javascript:_e(%7B%7D,'cvml','joachim.pouderoux at kitware.com');>> wrote:
>>>
>>>> Adam,
>>>>
>>>> The color difference can be explained by the default coloring mode
>>>> introduced recently (before the git tag version you tested with).
>>>> Multiblocks are now automatically colored by blocks. Toggle the Color
>>>> Legend and see the coloring array, "vtkBlockColors" is selected wereas in
>>>> previous version it was Solid Color I guess.
>>>> Regarding the missing pieces, I can tell that with the same git version
>>>> and with the OpenGL backend 1 (the old), all pieces are correctly drawn.
>>>> What is specific is that this missing blocks (the data has like a global
>>>> gemetry block + all the internal pieces) are the last block if the first
>>>> level block hierarchy.
>>>>
>>>> Joachim
>>>>
>>>>
>>>> *Joachim Pouderoux*
>>>>
>>>> *PhD, Technical Expert*
>>>> *Kitware SAS <http://www.kitware.fr>*
>>>>
>>>>
>>>> 2015-07-30 22:19 GMT+02:00 Adam Lyon <lyon at fnal.gov
>>>> <javascript:_e(%7B%7D,'cvml','lyon at fnal.gov');>>:
>>>>
>>>>> Hi,  I'm trying to use ParaView built with OpenGL2, hoping to see some
>>>>> speed improvement when I interact with my visualization. Indeed for a
>>>>> complicated geometry I see significant speed up (e.g. ~25 fps with OpenGL2
>>>>> vs. 5 fps with regular ParaView). But I also see serious errors in the
>>>>> display. I've attached two images of our "g-2 muon storage ring" (never
>>>>> mind what it actually is, though it is very cool :-) ..
>>>>>
>>>>> [image: Inline image 1]
>>>>>
>>>>> The first, mostly blue image, is from regular ParaView (downloaded Mac
>>>>> binary 4.3.1 64 bit)  and is what the ring is supposed to look like. There
>>>>> is a color vector selected and I've unchecked "Map scalars" so that the
>>>>> colors are "true". And indeed the RGB color values in the vector are what
>>>>> is shown on the display.
>>>>>
>>>>>
>>>>> [image: Inline image 2]
>>>>> The next image, with a chunk on the left side missing, is from the
>>>>> OpenGL2 ParaView (Mac built from source 4.3.1-882-gbdceec7 64 bit)
>>>>> configured identically as the other ParaView. So it should look identical
>>>>> to the mostly blue picture. Along with the missing chunk, you see the
>>>>> colors look very wrong. What's even stranger is that the missing chunk is
>>>>> really missing - not invisible - the visualization is made of multiblock
>>>>> datasets, and right clicking where a structure should be only brings up the
>>>>> link camera option.
>>>>>
>>>>> You can try this yourself -- see
>>>>> https://www.dropbox.com/sh/900ocfc90v0w3r6/AACmqz8kVrGPUMnJbpxAFOzBa?dl=0
>>>>> . The "gm2ring.zip" file has gm2ring.vtm (with the corresponding gm2ring
>>>>> directory) and gm2ring.pvsm to restore my configuration.
>>>>>
>>>>> I'm looking forward to using the OpenGL2 version when it works better.
>>>>> I hope this helps in working out its kinks (or hoping to find out I've
>>>>> built or configured something incorrectly). Let me know how I can help!
>>>>> Thanks! -- Adam
>>>>> *------*
>>>>>
>>>>> *Adam L. Lyon*
>>>>> *Scientist; Associate Division Head for Systems for Scientific
>>>>> Applications*
>>>>>
>>>>> Scientific Computing Division & Muon g-2 Experiment
>>>>> Fermi National Accelerator Laboratory
>>>>> 630 840 5522 office
>>>>> www.fnal.gov
>>>>> lyon at fnal.gov <javascript:_e(%7B%7D,'cvml','lyon at fnal.gov');>
>>>>>
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>>>>>
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>>>
>>
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>

-- 
*------*

*Adam L. Lyon*
*Scientist; Associate Division Head for Systems for Scientific Applications*

Scientific Computing Division & Muon g-2 Experiment
Fermi National Accelerator Laboratory
630 840 5522 office
www.fnal.gov
lyon at fnal.gov

Connect with us!
Newsletter <http://www.fnal.gov/pub/today/>  |  Facebook
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