void prepareWalls() { std::size_t mazeHeight = maze_data.size(); std::size_t mazeWidth = maze_data[0].size(); for (size_t i = 0; i != mazeHeight; ++i) { for (size_t j = 0; j != mazeWidth; ++j) { if (maze_data[i][j] == 'H') { prepareCube(i, j); } } } maze.Ready(); }