Function IsValidDirection

src/direction_func.h:32–35

* Checks if an integer value is a valid Direction * * @param d The value to check * @return True if the value belongs to a Direction, else false */

 * @return True if the value belongs to a Direction, else false
 */
inline bool IsValidDirection(Direction d)
{
	return d < DIR_END;
}

/**
 * Checks if an integer value is a valid Axis