void FillCutCellData(const StridedDataView< double, 2 > &unshielded, const StridedDataView< double, 2 > &shielded_left, const StridedDataView< double, 2 > &shielded_right, const StridedDataView< double, 2 > &doubly_shielded, const StridedDataView< double, 2 > &unshielded_rel, const StridedDataView< double, 2 > &shielded_left_rel, const StridedDataView< double, 2 > &shielded_right_rel, const StridedDataView< double, 2 > &doubly_shielded_rel, const PatchDataView< const double, 2 > &beta, Direction dir)