[Paraview-developers] MultiBlock datasets and Fetch

[Alejandro RIBES]

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
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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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