Burlen is correct. On Fri, Mar 26, 2010 at 11:30 AM, Burlen Loring <[email protected]> wrote: > If I'm not mistaken, when creating a VTK pipeline inside of a PV filter, you > need to make a shallow copy of the input dataset in order to keep the PV > pipeline isolated as your VTK pipeline executes. > > Try making a shallow copy of "input" and passing that into > "extractBlockFilter", and see if it helps. > > Burlen > > Paul Edwards wrote: >> >> Hi, >> >> I am writing an algorithm to operate on a vtkMultiBlockDataSet where I >> would like to extract blocks depending on field data that is set. >> Internally in my algorithm I am using the vtkExtractBlock filter and >> when this is updated it causes the RequestData for my reader to be >> executed again. This doesn't happen when applying ExtractBlock in >> ParaView. Below I have included an example RequestData that causes >> the data to be reloaded (note: this only happens when running in >> parallel): >> >> 8<----------------------------------------------------------------- >> int vtkTestMulti::RequestData( >> vtkInformation* vtkNotUsed(request), >> vtkInformationVector** inputVector, >> vtkInformationVector* outputVector) >> { >> >> vtkInformation* inInfo = inputVector[0]->GetInformationObject(0); >> vtkMultiBlockDataSet* input = vtkMultiBlockDataSet::SafeDownCast( >> inInfo->Get(vtkDataObject::DATA_OBJECT())); >> >> vtkInformation* outInfo = outputVector->GetInformationObject(0); >> vtkMultiBlockDataSet* output = vtkMultiBlockDataSet::SafeDownCast( >> outInfo->Get(vtkDataObject::DATA_OBJECT())); >> >> VTK_CREATE(vtkExtractBlock, extractBlockFilter); >> extractBlockFilter->SetInput(input); >> extractBlockFilter->AddIndex(1); >> extractBlockFilter->Update(); >> output->ShallowCopy(extractBlockFilter->GetOutput()); >> >> return 1; >> } >> ----------------------------------------------------------------->8 >> >> Can anyone see what I am doing wrong or provide any pointers for where to >> look? >> >> Thanks in advance, >> 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 >> > > _______________________________________________ > 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 > _______________________________________________ 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
