[Paraview] Parallel Python Programmable Filter Requesting Additional Ghost Data

[Jesus Pulido]

Thank you Berk.

I was under the impression that this command would trigger the reader to
automatically load in the additional # of requested ghost levels. I tested
the command and each data piece still has the same extents as before.

Is there any additional way to load in ghost level that's parallel
friendly? I am aware of the D3 filter but, from the memory usage, it seems
that it will load in the entire dataset into each processor and this is not
feasible for large datasets.

I am using binary, "raw" vti piece files each with their own extent of the
data and a header pvti file.
The data has no encoded ghost layers between pieces so I was hoping to have
paraview do that for me.

Jesus

On Tue, Jul 17, 2012 at 7:29 AM, Berk Geveci <berk.geveci at kitware.com>wrote:

> self.GetExecutive().GetOutputInformation(0).Set(vtk.vtkStreamingDemandDrivenPipeline.UPDATE_NUMBER_OF_GHOST_LEVELS(),
> 1)
>
>
> in RequestUpdateExtent script. Of course, this requires that the reader or
> a filter before the programmable filter is able to provide ghost levels.
>
>
> -berk
>
> On Wed, Jul 11, 2012 at 3:04 PM, Jesus Pulido <jpulido at ucdavis.edu> wrote:
>
>> Hello,
>>
>> I am trying to request ghost data in my python programmable filter but I
>> am not sure how to go about and do so. I am assuming the call would go into
>> the RequestUpdateExtent Script.
>>
>> In the C++ equivalent filters that do request ghost data, the call to is
>> something along the lines of
>> vtkStreamingDemandDrivenPipeline::UPDATE_NUMBER_OF_GHOST_LEVELS() , and
>> there are examples of that in the Paraview source but the way the objects
>> are defined and called does not translate into Paraview VTK Python. What
>> would be the appropriate call?
>>
>> Thank you,
>> Jesus
>>
>>
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