What angle represents the "rear" of a unit?

[meercat]

Same as the above.

What angle represents the "rear" of a unit?

 

[Earth-Fury]

UnitFacing - 180 or + 180.

360 degrees in total, half that is 180. Im not sure if WC3 will let you do "360 + 180", so you may have to check if UnitFacing > 180, and act accordingly.

 

[Fcuck]

If you don't know, before you put down a unit, keep pressing z for random angles, play around with it for a bit; and you'll get some angles you need. Then just remember them [=.

 

[PurplePoot]

Earth, it works fine, as 540 = 180, just like 360=0, in terms of degrees.

Also, you could just use ModuloInteger, so something like

local integer new = ModuloInteger( old+180, 360 )