[Paraview] Parallel Python Programmable Filter Requesting Additional Ghost Data

[Berk Geveci]

One more question. What are you doing after reading the data? Depending on
what you are doing, I might be able to give you a piece of code that uses
George's filter to generate ghost levels using MPI. You will need to use
ParaView built from git.

Next week, George and I will start working on updating ParaView's
structured data readers to generate ghost levels using MPI under covers. We
waited way too long to do it...

-berk

On Tue, Jul 17, 2012 at 3:34 PM, Jesus Pulido <jpulido at ucdavis.edu> wrote:

> Yes, appended raw mode. It has an ascii header then the data itself is
> binary after a specified underscore delimiter.
>
> Jesus
>
>
> On Tue, Jul 17, 2012 at 1:17 PM, Berk Geveci <berk.geveci at kitware.com>wrote:
>
>> Actually, I think that I noticed this too. It may be a bug specific to
>> the programmable filter. I will check it out. By the way, what do you mean
>> by "raw" vti? Appended raw mode?
>>
>> -berk
>>
>>
>> On Tue, Jul 17, 2012 at 12:22 PM, Jesus Pulido <jpulido at ucdavis.edu>wrote:
>>
>>> 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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