Method Initialize

Filters/CellGrid/vtkCellGridToUnstructuredGrid.cxx:42–86

}

bool vtkCellGridToUnstructuredGrid::Query::Initialize()
{
  this->Superclass::Initialize();
  this->OutputOffsets.clear();
  this->AttributeMap.clear();
  this->ConnectivityCount.clear();
  this->ConnectivityTransforms.clear();
  if (!this->Input || !this->Output)
  {
    vtkErrorMacro("Input or output grid is null.");
    return false;
  }

  // Create a new vtkPoints and initialize the point locator.
  vtkNew<vtkPoints> points;
  vtkNew<vtkCellArray> ugcells;
  vtkNew<vtkUnsignedCharArray> ugtypes;
  std::array<double, 6> bounds;
  points->SetDataTypeToDouble();
  this->Input->GetBounds(bounds.data());
  this->Output->SetPoints(points);
  this->Output->SetCells(ugtypes, ugcells);
  this->Locator->SetDataSet(this->Output);
  this->Locator->InitPointInsertion(points.GetPointer(), bounds.data());
  this->ConnectivityCount.clear();
  this->ConnectivityWeights.clear();

  this->AttributeMap[this->Input->GetShapeAttribute()] = points->GetData();

  for (const auto& inputAtt : this->Input->GetCellAttributeList())
  {
    if (this->Input->GetShapeAttribute() == inputAtt)
    {
      continue;
    }

    vtkNew<vtkDoubleArray> outputArr;
    outputArr->SetName(inputAtt->GetName().Data().c_str());
    outputArr->SetNumberOfComponents(inputAtt->GetNumberOfComponents());
    // Note that we do not allocate memory yet.
    this->Output->GetPointData()->AddArray(outputArr);
    this->AttributeMap[inputAtt] = outputArr;
  }
  return true;
}

void vtkCellGridToUnstructuredGrid::Query::StartPass()
{