Method RequestData

Filters/Modeling/vtkBandedPolyDataContourFilter.cxx:319–912

------------------------------------------------------------------------------ Create filled contours for polydata

//------------------------------------------------------------------------------
// Create filled contours for polydata
int vtkBandedPolyDataContourFilter::RequestData(vtkInformation* vtkNotUsed(request),
  vtkInformationVector** inputVector, vtkInformationVector* outputVector)
{
  // get the info objects
  vtkInformation* inInfo = inputVector[0]->GetInformationObject(0);
  vtkInformation* outInfo = outputVector->GetInformationObject(0);

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

  vtkPointData* pd = input->GetPointData();
  vtkPointData* outPD = output->GetPointData();
  vtkCellData* outCD = output->GetCellData();
  vtkPoints* inPts = input->GetPoints();
  vtkDataArray* inScalars = this->GetInputArrayToProcess(0, inputVector);
  bool abort = false;
  vtkIdType npts = 0;
  vtkIdType cellId = 0;
  const vtkIdType* pts = nullptr;
  int numEdgePts, maxCellSize;
  vtkIdType v;
  vtkIdType vR;
  const vtkIdType* intPts;
  vtkIdType intCellId;
  vtkIdType numIntPts;
  vtkIdType numPts, numCells, estimatedSize;

  vtkDebugMacro(<< "Executing banded contour filter");

  //  Check input
  //

  numCells = input->GetNumberOfCells();
  if (!inPts || (numPts = inPts->GetNumberOfPoints()) < 1 || numCells < 1)
  {
    vtkErrorMacro(<< "No input data!");
    return 1;
  }

  if (!inScalars)
  {
    vtkErrorMacro(<< "No input data: point scalars required!");
    return 1;
  }

  if (inScalars->GetNumberOfComponents() < this->Component + 1)
  {
    vtkErrorMacro(<< "Input scalars expected to have " << this->Component + 1 << " components");
    return 0;
  }

  if (this->ContourValues->GetNumberOfContours() < 1)
  {
    vtkWarningMacro(<< "No contour values");
    return 1;
  }