turn proc

turn(Dir, Angle)

Dir: One of NORTH, SOUTH, EAST, WEST, NORTHEAST, NORTHWEST, SOUTHEAST, SOUTHWEST.
Angle: An angle in degrees (counterclockwise rotation).

The rotated direction.

This proc can also be applied to an icon, a matrix, or a vector.

var/dir
dir = turn(NORTH, 90)  // dir = west
dir = turn(dir, -90)   // dir = north
dir = turn(dir, 45)    // dir = northwest

Only multiples of 45 are allowed for angles. If an invalid angle is used, it will be treated as the closest multiple of 45 to 0.

If the supplied Dir is invalid, such as 0, or something like UP or DOWN, the result is a random direction unless the angle is also 0.

DM Reference