I am pretty sure that is multiple connections on a single port. On Wed, May 6, 2009 at 3:59 PM, David Fuentes <[email protected]> wrote:
> Thanks alot Ken, > > > When you highlight multiple datasets for input into a > filter, is that multiple ports or multiple connections on one port ? > > > > > > > > > On Wed, 6 May 2009, Moreland, Kenneth wrote: > > There are two parts to making this work. The first part is supporting >> multiple ports and/or connections in the filter itself. To set the number >> of input ports, you call this->SetNumberOfInputPorts() in the filter's >> constructor. To set the number of connections allowed on each port, you >> override the FillInputPortInformation method and add the appropriate flags >> to the information object. The specifics are documented at the beginning of >> Chapter 13 (How to Write an Algorithm for VTK) in the latest VTK User's >> Guide book. >> >> The second part is to announce the input ports and/or connections in the >> server manager XML. To set multiple ports, provide multiple InputProperty >> elements, one for each input. These are easiest to set up if you provide >> convenience methods for each port in your filter that call >> SetInputConnection with the appropriate port number. The arguments for the >> InputProperty tag provide information about ports that support multiple >> connections and optional ports. The ParaView Guide book provides some >> documentation on the XML structure and the >> ParaView3/Servers/ServerManager/Resources/filters.xml source file provides >> plenty of examples. The ArbitrarySourceStreamTracer, labeled "Stream Tracer >> (Custom Source)", provides good examples of both multiple ports and ports >> that support multiple connections. >> >> -Ken >> >> >> On 5/5/09 5:08 PM, "David Fuentes" <[email protected]> wrote: >> >> Hello, >> >> >> What is the proper way to write a filter plugin for paraview w/ multiple >> connections and access the data from each connection? >> >> >> I have been trying to use the vtkProgrammableFilter, >> vtkPythonProgrammableFilter, vtkMultiBlockDataGroupFilter, and >> vtkTemporalStaticsFilter as examples. >> >> >> int vtkMyFilterPlugin::RequestData( >> vtkInformation *vtkNotUsed(request), >> vtkInformationVector **inputVector, >> vtkInformationVector *outputVector) >> { >> >> int numInputs = inputVector[0]->GetNumberOfInformationObjects(); >> for (int idx = 0; idx < numInputs; ++idx) >> { >> vtkInformation *inInfo = inputVector[0]->GetInformationObject(idx); >> >> vtkDataObject *input = vtkDataObject::GetData(inInfo); >> >> vtkDataSet *inputDataSet = vtkDataSet::SafeDownCast( input) ; >> >> . >> . >> . >> } >> >> where numInputs = the number of connections to my Filter. >> vtkDataSet::SafeDownCast(input) returns a NULL pointer when I have >> multiple connections to the filter but works for ONE connection. >> How do I get the pointer(s) that will let me access the vtkDataArray >> for each connection to my filter? ie >> >> vtkPointData *pd=inputDataSet->GetPointData(); >> int numArrays = pd->GetNumberOfArrays(); >> for (int i = 0; i < numArrays; i++) >> { >> vtkDataArray *array = pd->GetArray(i); >> } >> >> >> thanks, >> df >> _______________________________________________ >> 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 >> >> >> >> >> **** Kenneth Moreland >> *** Sandia National Laboratories >> *********** >> *** *** *** email: [email protected] >> ** *** ** phone: (505) 844-8919 >> *** web: >> http://www.cs.unm.edu/~kmorel<http://www.cs.unm.edu/%7Ekmorel> >> >> >> _______________________________________________ > 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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