Редактирование: Understanding SS13 code (раздел)

===== Direction (dir) var =====
[http://www.byond.com/members/?command=reference&path=atom%2Fvar%2Fdir reference]

'''North:''' 1<br>
'''South:''' 2<br>
'''East:''' 4<br>
'''West:''' 8<br>
'''Northeast:''' 5 (1 + 4)<br>
'''Southeast:''' 6 (2 + 4)<br>
'''Northwest:''' 9 (1 + 8)<br>
'''Southwest:''' 10 (2 + 8)<br>

They are numbered like this because dir uses the 'bitflag' methodology. You can read more about bitflags [[Binary_flags|here.]]  It is defined in binary, so...

'''0001''' is north<br>
'''0010''' is south<br>
'''0100''' is east<br>
'''1000''' is west

Combining these numbers yields north-east (0101), north-west (1001), south-east (0110) and south-west (1010). Tho other combinations (east-west(1100), north-south (0011), north-east-west (1101) and such) are possible for special uses. Smoothwall code is an example.