Method GetFace

Filters/Geometry/vtkGeometryFilter.cxx:1595–1629

  };

  std::array<TInputIdType, 4> GetFace(const int ijk[3], bool minFace, FaceMode faceMode)
  {
    const int& axis = this->CurrentAxis;
    const int& iAxis = this->IAxis;
    const int& jAxis = this->JAxis;

    int ptIjk[3] = { ijk[0], ijk[1], ijk[2] };
    if (!minFace)
    {
      ++ptIjk[axis];
    }

    std::array<TInputIdType, 4> face;
    face[0] =
      static_cast<TInputIdType>(vtkStructuredData::ComputePointIdForExtent(this->Extent, ptIjk));

    ++ptIjk[iAxis];
    face[1] =
      static_cast<TInputIdType>(vtkStructuredData::ComputePointIdForExtent(this->Extent, ptIjk));

    ++ptIjk[jAxis];
    face[2] =
      static_cast<TInputIdType>(vtkStructuredData::ComputePointIdForExtent(this->Extent, ptIjk));

    --ptIjk[iAxis];
    face[3] =
      static_cast<TInputIdType>(vtkStructuredData::ComputePointIdForExtent(this->Extent, ptIjk));

    if (minFace || faceMode == FaceMode::WHOLE_FACE)
    {
      // invert face order to get an outside pointing normal.
      std::swap(face[1], face[3]);
    }
    return face;
  }

  void FaceOperator(vtkIdType faceBeginCellId, vtkIdType faceEndCellId)
  {