Check if player is behind mob in Lua - allfoxwy/UnitXP_SP3 GitHub Wiki

• /script message(tostring(UnitXP("behind", UNIT_ID_0, UNIT_ID_1)));

UNIT_ID could be player, target... also GUID string "0x12345"

Return TRUE for Unit 0 is behind Unit 1, NIL for error.

Normally behind is calculated on server. However UnitXP_SP3 is based on client data, which means it could result wrongly/delayed. The expectation is that when the mob is in a stable position attacking the tank, this method could give a reasonable prediction.

By default this method judge the front half π radians cone as front, and the back half π radians cone as back. However some mobs in the game have a strange hit box which is not like this.

So there is a threshold could be adjusted:

• /script message(tostring(UnitXP("behindThreshold", "set", VALUE)))

VALUE is a float number by default is π / 2 (about 1.57079632679). When it is set greater than π / 2, the half cone which is judged as back would become smaller.