[Paraview] Inconsistent client view in tiled-display mode

Thu Aug 26 19:40:46 EDT 2010

David,

Maybe there are some version related differences involved here - I  
found a Client Collect checkbox & slider in Edit->Settings->Render  
View->Server->Tiled Display Parameters. However unchecking it and then  
changing some object parameter to force a re-render makes no  
difference to the client view here.

I appreciate the logic behind decimating the client view but, as  
Stephane already mentioned, there are use cases where its not helpful.  
We have a similar use requirement to Stephane - needing to stream a  
lower res version. It would be great if the Client Collect checkbox  
would work as you suggest. Should I try a different version? I'm  
currently on a Linux build from the 3.8.0 source tarball.

chris

On 26/08/2010, at 9:55 PM, David E DeMarle wrote:

> Un-check the checkbox to the left and the client should get the full  
> res geometry too.
>
> David E DeMarle
> Kitware, Inc.
> R&D Engineer
> 28 Corporate Drive
> Clifton Park, NY 12065-8662
> Phone: 518-371-3971 x109
>
>
> On Thu, Aug 26, 2010 at 7:50 AM, Stephane PLOIX  
> <stephane.ploix at edf.fr> wrote:
>
> Hi,
>
> Since this thread is started, I would like to point out that saying  
> that display walls are only used if the data size is large is not  
> true for everybody.
>
> We have several use cases where having a correct rendering on the  
> client would be helpfull :
> * display walls can be used for team meetings : the space is then  
> used to have several people view the same thing, not always very big  
> in terms of number of cells. In this case, it is very usefull to  
> have the possibility to pick/select some part of an object, and it  
> is very diffcult to do so with a decimated view.
> * we also use some tools like virtualGL that enable image-based  
> collaboration by streaming the image of the client to a remote  
> viewer : for instance if someone was not able to join the meeting  
> and still want to participate and share the same view on his  
> desktop. Sending a view of a decimated object is not very helpfull...
>
> I would vote for having the possibility to have a full-resolution  
> view on the client, comments?
>
> Best,
> Stephane
>
>
>  <ATT00001.gif>
>
> Stephane PLOIX
> Pilote Opérationnel - Visualisation scientifique
> EDF - R&D
> SINETICS
> 1, Av du Général de Gaulle
> 92140 Clamart
>
> stephane.ploix at edf.fr
> Tél. : +33 (0) 1 47 65 51 10
>  <ATT00002.gif>
> Un geste simple pour l'environnement, n'imprimez ce message que si  
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>
>
>
> dave.demarle at kitware.com
> Envoyé par : paraview-bounces at paraview.org
> 26/08/2010 13:14
>
> A
> c.willing at uq.edu.au
> cc
> paraview at paraview.org
> Objet
> Re: [Paraview] Inconsistent client view in tiled-display mode
>
>
>
>
>
> This is probably intended behavior. What is the setting of the "Client
> Collect" slider on the "Options"||"Preferences"->"Render
> View"->"Server"->"Tile Display Parameters" tab of the Options panel?
> Unless its checkbox is unchecked, ParaView either decimates the
> geometry before sending it to the client or if larger than the
> threshold, sends only bounding boxes. The reasoning being that if the
> rendered geometry is big enough to require a tiled display to show, a
> single GPU on the client is unlikely to be able to handle it a full
> resolution.
>
> David E DeMarle
> Kitware, Inc.
> R&D Engineer
> 28 Corporate Drive
> Clifton Park, NY 12065-8662
> Phone: 518-371-3971 x109
>
>
>
> On Thu, Aug 26, 2010 at 2:50 AM, Christoph Willing <c.willing at uq.edu.au 
> > wrote:
> > When running in tiled display mode, the view at the client is  
> sometimes
> > missing part of the geometry.
> >
> > The effect appears to differ according to the number of tiles in  
> play. As an
> > example just to demonstrate the effect:
> > - with a 4x4 tiling, a simple cylinder with no capping starts  
> losing bits of
> > the cylinder when resolution setting is at 17. With a 4x5 tiling,  
> distortion
> > starts when resolution is 61. I have snapshots to show the effect  
> at:
> >    http://www.vislab.uq.edu.au/research/paraview/missingbits.html
> >
> > Of course it starts looking pretty bad with a real, more  
> complicated,
> > visualisation.
> >
> > Just to reiterate, this effect is just in the client viewer. The  
> rendering
> > on the tiled display itself is perfect.
> >
> > Is this a known phenomenon?
> >
> >
> > chris
> >
> > (I'm running 3.8.0 built from tarball at paraview website).
> >
> >
> > Christoph Willing                       +61 7 3365 8316
> > QCIF Access Grid Manager
> > University of Queensland
> >
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Christoph Willing                       +61 7 3365 8316
QCIF Access Grid Manager
University of Queensland