Method SetNumberOfOutputPorts

Common/ExecutionModel/vtkAlgorithm.cxx:1021–1056

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//------------------------------------------------------------------------------
void vtkAlgorithm::SetNumberOfOutputPorts(int n)
{
  // Sanity check.
  if (n < 0)
  {
    vtkErrorMacro("Attempt to set number of output ports to " << n);
    n = 0;
  }

  // We must remove all connections from ports that are removed.
  for (int i = n; i < this->GetNumberOfOutputPorts(); ++i)
  {
    // Get the producer and its output information for this port.
    vtkExecutive* producer = this->GetExecutive();
    vtkInformation* info = producer->GetOutputInformation(i);

    // Remove all consumers' references to this producer on this port.
    vtkExecutive** consumers = vtkExecutive::CONSUMERS()->GetExecutives(info);
    int* consumerPorts = vtkExecutive::CONSUMERS()->GetPorts(info);
    int consumerCount = vtkExecutive::CONSUMERS()->Length(info);
    for (int j = 0; j < consumerCount; ++j)
    {
      vtkInformationVector* inputs = consumers[j]->GetInputInformation(consumerPorts[j]);
      inputs->Remove(info);
    }

    // Remove this producer's references to all consumers on this port.
    vtkExecutive::CONSUMERS()->Remove(info);
  }

  // Set the number of output port information objects.
  this->OutputPortInformation->SetNumberOfInformationObjects(n);

  // Set the number of connection proxy objects.
  this->AlgorithmInternal->Outputs.resize(n);
}

//------------------------------------------------------------------------------
vtkInformation* vtkAlgorithm::GetInputPortInformation(int port)