Method RequestData

Filters/Modeling/vtkDijkstraImageGeodesicPath.cxx:114–152

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//------------------------------------------------------------------------------
int vtkDijkstraImageGeodesicPath::RequestData(vtkInformation* vtkNotUsed(request),
  vtkInformationVector** inputVector, vtkInformationVector* outputVector)
{
  vtkInformation* costInfo = inputVector[0]->GetInformationObject(0);
  vtkInformation* outInfo = outputVector->GetInformationObject(0);

  vtkImageData* image = vtkImageData::SafeDownCast(costInfo->Get(vtkDataObject::DATA_OBJECT()));

  if (!image)
  {
    return 0;
  }

  vtkPolyData* output = vtkPolyData::SafeDownCast(outInfo->Get(vtkDataObject::DATA_OBJECT()));

  if (!output)
  {
    return 0;
  }

  if (this->AdjacencyBuildTime.GetMTime() < image->GetMTime())
  {
    this->Initialize(image);
  }
  else
  {
    // if the filter's static cost weights change, then update them
    if (this->RebuildStaticCosts)
    {
      this->UpdateStaticCosts(image);
    }
    this->Reset();
  }

  this->ShortestPath(image, this->StartVertex, this->EndVertex);
  this->TraceShortestPath(image, output, this->StartVertex, this->EndVertex);

  return 1;
}

//------------------------------------------------------------------------------
double vtkDijkstraImageGeodesicPath::CalculateStaticEdgeCost(