[Paraview] KEYS_TO_COPY method

[Berk Geveci]

Hi Yves,

You need to make sure that you are setting the right keys on the right
information objects. We use quite a few different information objects so
this is confusing at times.

You need to set KEYS_TO_COPY() on the request (first argument to
RequestData).
You need to set the key/value you want copied on the output information
(outInfo) and read it from input information.

The data object's information object is not used for pipeline purposes so
you can't do:

*inInfo = inputDataSet->GetInformation()*
*
*
You should do:

inInfo = inputVector[0]->GetInformationObject(0);

Best,
-berk


On Tue, Oct 30, 2012 at 11:28 AM, Yves Rogez <yves.rogez at obs.ujf-grenoble.fr
> wrote:

>  Hi,
>
> I'm trying to implement a self-made plugin in Paraview, using a working
> VTK filter.
> This filter sets a key into the information of my output data set
>
> *outInfo = output->GetInformation()*
>
>
> I have to retrieve this key into the RequestData() pass of the connected
> filter. It works well in a pure VTK pipeline, but in Paraview, it seems
> that an intermediate filter vtkPVPostFilter drops this information key.
> So I found in this mailing list that keys could be copied, by appending
> the key to KEYS_TO_COPY() key of the information.
> What I do by
>
> *outInfo->AppendUnique(vtkExecutive::KEYS_TO_COPY(),
> cnsVTK_ResultReader_HDF5::DATA_POINTER());*
>
> The output information PrintSelf() :
>
> *Debug: Off*
> *Modified Time: 235702*
> *Reference Count: 1*
> *Registered Events: (none)*
> *DATA_POINTER: 1757632496*
> *DATA_NUMBER_OF_PIECES: 0*
> *KEYS_TO_COPY: DATA_POINTER*
> *DATA_EXTENT_TYPE: 0*
> *DATA_PIECE_NUMBER: -1*
> *DATA_NUMBER_OF_GHOST_LEVELS: 0*
> *End of result reader Request Data*
>
> But the key is not copied, or at least, I can't read it into the consumer
> RequestData() pass :
>
> *inInfo = inputDataSet->GetInformation()*
>
> The *inInfo* PrintSelf() :
>
> *Debug: Off*
> *Modified Time: 234317*
> *Reference Count: 1*
> *Registered Events: (none)*
> *DATA_NUMBER_OF_PIECES: 1*
> *DATA_EXTENT_TYPE: 0*
> *DATA_PIECE_NUMBER: 0*
> *DATA_NUMBER_OF_GHOST_LEVELS: 0*
>
> So, all specific information keys have been deleted...
>
> Thank you in advance for your help,
>
> Yves
>
> --
> Yves Rogez
>
> *IPAG CNRS/UJF*
> *Institut de Planétologie et d'Astrophysique de Grenoble*
> Bat D de Physique - BP. 53 - 38041 Grenoble - FRANCE
>
> *tel : +33 (0)4 76 63 52 80*
> lab : +33 (0)4 76 63 52 89
>
> _______________________________________________
> Powered by www.kitware.com
>
> Visit other Kitware open-source projects at
> http://www.kitware.com/opensource/opensource.html
>
> Please keep messages on-topic and check the ParaView Wiki at:
> http://paraview.org/Wiki/ParaView
>
> Follow this link to subscribe/unsubscribe:
> http://www.paraview.org/mailman/listinfo/paraview
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.paraview.org/pipermail/paraview/attachments/20121030/6422e8cf/attachment.htm>