| 46 | } |
| 47 | |
| 48 | virtual reference operator()(const Vector_i& index) { |
| 49 | assert(is_valid_index(index)); |
| 50 | size_t linear_index = linearize_index(index); |
| 51 | return m_grid[linear_index]; |
| 52 | } |
| 53 | |
| 54 | virtual const_reference operator()(const Vector_i& index) const { |
| 55 | assert(is_valid_index(index)); |