Method RequestData

Filters/Geometry/vtkGeometryFilter.cxx:178–232

----------------------------------------------------------------------------

//----------------------------------------------------------------------------
int vtkGeometryFilter::RequestData(vtkInformation* vtkNotUsed(request),
  vtkInformationVector** inputVector, vtkInformationVector* outputVector)
{
  // get the info objects
  vtkInformation* inInfo = inputVector[0]->GetInformationObject(0);
  vtkInformation* excInfo = inputVector[1]->GetInformationObject(0);
  vtkInformation* outInfo = outputVector->GetInformationObject(0);

  // get the input and output
  vtkDataSet* input = vtkDataSet::SafeDownCast(inInfo->Get(vtkDataObject::DATA_OBJECT()));
  vtkPolyData* output = vtkPolyData::SafeDownCast(outInfo->Get(vtkDataObject::DATA_OBJECT()));

  vtkIdType numPts = input->GetNumberOfPoints();
  vtkIdType numCells = input->GetNumberOfCells();

  if (numPts == 0 || numCells == 0)
  {
    return 1;
  }

  // Check to see if excluded faces have been provided, and is so prepare the data
  // for use.
  vtkPolyData* excFaces = nullptr;
  if (excInfo)
  {
    excFaces = vtkPolyData::SafeDownCast(excInfo->Get(vtkDataObject::DATA_OBJECT()));
  }
  int wholeExtent[6] = { 0, -1, 0, -1, 0, -1 };
  if (input->GetExtentType() == VTK_3D_EXTENT)
  {
    const int* wholeExt32;
    wholeExt32 = inInfo->Get(vtkStreamingDemandDrivenPipeline::WHOLE_EXTENT());
    std::copy(wholeExt32, wholeExt32 + 6, wholeExtent);
  }

  // Prepare to delegate based on dataset type and characteristics.
  if (vtkPolyData::SafeDownCast(input))
  {
    return this->PolyDataExecute(input, output, excFaces);
  }
  else if (vtkUnstructuredGridBase::SafeDownCast(input))
  {
    return this->UnstructuredGridExecute(input, output, nullptr, excFaces);
  }
  else if (vtkImageData::SafeDownCast(input) || vtkRectilinearGrid::SafeDownCast(input) ||
    vtkStructuredGrid::SafeDownCast(input))
  {
    return this->StructuredExecute(input, output, wholeExtent, excFaces);
  }
  else
  {
    // Use the general case
    return this->DataSetExecute(input, output, excFaces);
  }
}

//------------------------------------------------------------------------------
void vtkGeometryFilter::SetExcludedFacesData(vtkPolyData* input)