[Paraview] Differences between OpenGL and OpenGL2 versions of ParaView

[Joachim Pouderoux]

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
>
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