[Paraview] Concept: A world without Any Bugs

[Biddiscombe, John A.]

Utkarsh

Since you brought up the topic of not "apply"ing filters on creation. Can you tell me a quick fix of how to prevent this related bug of multiple execution of filters ...

Example
1) Load a dataset in parallel
2) Add a Probe Location filter.
I've added output messages to the executives to say when NeedToUpdate returns true and why and here's what I get.
On creation of the filter and hitting apply

vtkPProbeFilter DDP NeedtoUpdate Pipeline Time
vtkPProbeFilter DDP NeedtoUpdate Pipeline Time

Immediatly afterwards ...the probe updates again but this time

vtkPProbeFilter SDDP NeedtoUpdate GhostLevel
vtkPProbeFilter SDDP NeedtoUpdate GhostLevel

Some of these operations take a very long time in my case and having to execute twice is very painful. The trouble is I can't seem to shut the ghostlevel request off (I'm handling ghosts manually, so I don't need ghost levels specified in the information - though I'd rather use the information, but have a ghost region as a 3D extent not a 'level')

Can you tell me where the ghost level is being set. I've put breakpoints on all the obvious places ...but somewhere in one of the geometry/surface/other display filters it must be being set afterwards

Thanks

JB

-----Original Message-----
From: paraview-bounces at paraview.org [mailto:paraview-bounces at paraview.org] On Behalf Of Utkarsh Ayachit
Sent: 01 June 2011 21:31
To: ParaView
Subject: [Paraview] Concept: A world without the Apply button

Folks,

I have been investigating the ability to create pipelines in ParaView
without having to hit Apply at every single stage in the pipeline.
This would make it much easier to deal with really large data in a
usage scenario where the scientist is fairly familiar with the
visualization pipeline he's interested in setting up.

Following the recent changes to the ParaView ServerManager, the
ServerManager level requirement that filters need to be updated before
connecting has disappeared. However, we still need to "Apply" to get
updated information about arrays etc.

After a couple on discussions with Berk and Dave, I've consolidated
the thoughts on a Wiki page. If any one has any thoughts to share, it
would be great.

http://www.paraview.org/ParaView3/index.php/No-Apply_Mechanism_for_Creating_Pipelines

Note that this is merely a concept. We have no plans of implementing
it in near future (3.12/4.0).

Utkarsh
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