Method operator()

Common/DataModel/vtkCellArray.cxx:298–326

{
  template <class OffsetsT, class ConnectivityT>
  void operator()(
    OffsetsT* offsets, ConnectivityT* vtkNotUsed(conn), vtkIdType& isHomogeneous) const
  {
    using ValueType = GetAPIType<OffsetsT>;

    const vtkIdType numCells = offsets->GetNumberOfValues() - 1;
    if (numCells == 0)
    {
      isHomogeneous = 0;
      return;
    }

    // Initialize using the first cell:
    const vtkIdType firstCellSize = GetCellSize(offsets, 0);

    // Verify the rest:
    auto offsetsRange = GetRange(offsets);
    auto it = std::adjacent_find(offsetsRange.begin() + 1, offsetsRange.end(),
      [&](const ValueType a, const ValueType b) -> bool
      { return static_cast<vtkIdType>(b - a) != firstCellSize; });

    if (it != offsetsRange.end())
    { // Found a cell that doesn't match the size of the first cell:
      isHomogeneous = -1;
      return;
    }

    isHomogeneous = firstCellSize;
  }
};

struct AllocateExactImpl : public vtkCellArray::DispatchUtilities