[Paraview-developers] MultiBlock datasets and Fetch

[Utkarsh Ayachit]

Alejandro,

You're right, merge blocks will discard all partial array. In that case, it
might be better to use the ProgrammableFilter with the script to process
the data directly on  the server-side, unless the algorithm you're
implementing needs the data to be reduced among all processes.

Utkash


On Wed, Feb 27, 2013 at 5:26 AM, Alejandro RIBES <alejandro.ribes at edf.fr>wrote:

>
> Hi Berk,
>
> I am helping some people in the company with the postprocessing of some
> mechanical displacements. They are at the moment scripting in python and
> need to loop over all the nodes of their mesh and access a field value at
> the same time. Their basic structures are MutiBlock datasets with
> unstructured grids inside. GetPointData does not work if a fetch is not
> done before, this is the origin of the problem.
>
> By the way, the blocks have partial fields associated to them (fields
> associated to a block are not necessarily present in another block). I
> tried MergeBlocks and it seems like partial fields disappear from the
> resulting unstructured grid.
>
> Thanks in advance for your help,
>
> Alejandro.
>
>
>
>
>  *berk.geveci at kitware.com*
>
> 26/02/2013 20:23
>   A
> alejandro.ribes at edf.fr
> cc
> paraview-developers at paraview.org, paraview-developers-bounces at paraview.org
> Objet
> Re: [Paraview-developers] MultiBlock datasets and Fetch
>
>
>
>
> Hi Alejandro,
>
> What is the end goal? Why are you trying to Fetch an entire dataset?
>
> Best,
> -berk
>
> On Mon, Feb 25, 2013 at 1:02 PM, Alejandro RIBES <alejandro.ribes at edf.fr>
> wrote:
> >
> > Hello,
> >
> > In a python script I am trying to deal with a MultiBlock dataset
> composed of
> > Unstructured grids in order to access to
> > GetPointData().GetArray('TemperatureField') on my grids. I'm having
> trouble
> > understanding how to access to this information because the help of
> ParaView
> > says that a Fetch is not working on MultiBlock datasets. I indeed tried
> > servermanager.Fetch() on my dataset and I cannot access anything later.
> > Should I call the fetch with an ExtractBlock filter? Should I use a
> special
> > "reduction kind" of filter for that? In this case what are the
> parameters of
> > the fetch, someone know it?
> >
> > Thanks in advance,
> >
> > Alejandro.
> >
> >
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