Method ReadPolyhedronCellArray

IO/XML/vtkXMLUnstructuredDataReader.cxx:911–1453

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//------------------------------------------------------------------------------
int vtkXMLUnstructuredDataReader::ReadPolyhedronCellArray(vtkIdType numberOfCells,
  vtkXMLDataElement* eCells, vtkCellArray* outFaces, vtkCellArray* outFaceOffsets)
{
  if (numberOfCells <= 0)
  {
    return 1;
  }
  else
  {
    if (!eCells || !outFaces || !outFaceOffsets)
    {
      return 0;
    }
  }

  // Split progress range
  float progressRange[2] = { 0, 0 };
  this->GetProgressRange(progressRange);
  float fractions[5] = { 0, 0.2f, 0.4f, 0.6f, 1 };

  // Set range of progress for offsets array.
  this->SetProgressRange(progressRange, 0, fractions);

  //
  // Start by reading polyhedron_to_face arrays
  //
  // ------------------------ Read polyhedron_to_face offsets -------------------------------------
  vtkSmartPointer<vtkDataArray> polyhedronCellOffsets;
  {
    vtkXMLDataElement* polyOffsets = this->FindDataArrayWithName(eCells, "polyhedron_offsets");
    if (!polyOffsets && !this->AbortExecute)
    {
      vtkErrorMacro("Cannot read polyhedron cell offsets from "
        << eCells->GetName() << " in piece " << this->Piece
        << " because the \"polyhedron_offsets\" array could not be found.");
      return 0;
    }

    if (this->AbortExecute)
    {
      return 0;
    }

    auto aOffsets = vtk::TakeSmartPointer(this->CreateArray(polyOffsets));
    if (!aOffsets)
    {
      vtkErrorMacro("Polyhedron cell offsets array missing from " << eCells->GetName());
      return 0;
    }

    if (!aOffsets->IsA("vtkDataArray"))
    {
      vtkErrorMacro(
        "Cannot cast polyhedron cell offsets from " << eCells->GetName() << " to vtkDataArray.");
      return 0;
    }

    polyhedronCellOffsets = vtkArrayDownCast<vtkDataArray>(aOffsets.Get());