[Paraview] Differences between OpenGL and OpenGL2 versions of ParaView

[Adam Lyon]

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

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On Fri, Jul 31, 2015 at 2:41 AM, Joachim Pouderoux <
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>:
>
>> 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
>>
>> Connect with us!
>> Newsletter <http://www.fnal.gov/pub/today/>  |  Facebook
>> <https://www.facebook.com/Fermilab>  |  Twitter
>> <https://twitter.com/Fermilab>
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