Utkarsh, If you do that you will end up with all the empty blocks in the structure. I would like to just see the extracted blocks without losing the original structure.
Regards, Paul On 25 February 2010 14:50, Utkarsh Ayachit <[email protected]>wrote: > Paul, > > If you don't want the ExtractBlock filter to prune the output, you can > always simply uncheck the "Prune Output" checkbox. > > Utkarsh > > On Thu, Feb 18, 2010 at 9:45 AM, Paul Edwards <[email protected]> > wrote: > > Hi, > > What is the reason for pruning the structure in the "Extract Block" > filter > > when there is only one child item? I output the following structure from > > the custom reader: > > > > output (multi-block dataset) > > > > zone 1 (multi-block dataset) > > > > volume (unstructured grid) > > boundaries (multi-block dataset) > > > > blade (poly data) > > hub (poly data) > > case (poly data) > > > > zone 2 (multi-block dataset) > > > > volume (unstructured grid) > > boundaries (multi-block dataset) > > > > blade (poly data) > > hub (poly data) > > case (poly data) > > > > If I were to extract both the blades then the resulting structured would > be: > > > > output (multi-block dataset) > > > > blade (poly data) > > blade (poly data) > > > > This has now lost all the information from the original structure. > > Commenting out the section for the case when there is only one child item > > fixes this for me: > > > 8<-------------------------------------------------------------------------------------------------- > > Index: ./VTK/Graphics/vtkExtractBlock.cxx > > =================================================================== > > RCS file: /cvsroot/ParaView3/ParaView3/VTK/Graphics/vtkExtractBlock.cxx,v > > retrieving revision 1.6 > > diff -r1.6 vtkExtractBlock.cxx > > 239,251c239,251 > > < vtkMultiBlockDataSet* prunedBlock = > > vtkMultiBlockDataSet::SafeDownCast(block); > > < if (prunedBlock && prunedBlock->GetNumberOfBlocks()==1) > > < { > > < // shrink redundant branches. > > < clone->SetBlock(index, prunedBlock->GetBlock(0)); > > < if (prunedBlock->HasMetaData(static_cast<unsigned int>(0))) > > < { > > < clone->GetMetaData(index)->Copy(prunedBlock->GetMetaData( > > < static_cast<unsigned int>(0))); > > < } > > < } > > < else > > < { > > --- > >> // vtkMultiBlockDataSet* prunedBlock = > >> vtkMultiBlockDataSet::SafeDownCast(block); > >> // if (prunedBlock && prunedBlock->GetNumberOfBlocks()==1) > >> // { > >> // // shrink redundant branches. > >> // clone->SetBlock(index, prunedBlock->GetBlock(0)); > >> // if (prunedBlock->HasMetaData(static_cast<unsigned int>(0))) > >> // { > >> // clone->GetMetaData(index)->Copy(prunedBlock->GetMetaData( > >> // static_cast<unsigned int>(0))); > >> // } > >> // } > >> // else > >> // { > > 257c257 > > < } > > --- > >> // } > > > -------------------------------------------------------------------------------------------------->8 > > Could this case be removed in the main CVS or is there a good reason for > > keeping it? (maybe an option could be added for it....) > > Thanks, > > Paul > > _______________________________________________ > > 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 > > > > >
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