Function is_valid_tile_coord

library/include/modules/Maps.h:174–176

* Check if a 2D coordinate is in the 0-15 range. */

 * Check if a 2D coordinate is in the 0-15 range.
 */
inline bool is_valid_tile_coord(df::coord2d p) {
    return (p.x & ~15) == 0 && (p.y & ~15) == 0;
}

/**
 * Utility class representing a cuboid of df::coord.