This is designed for garrisoning AI in buildings, without preventing them from reacting when enemies are too close for their firing positions to be useful- very near to, or inside the building. You can choose to disable reaction if you don't want the additional overhead.

ptg_garrison.sqf

//This is designed for garrisoning AI in buildings, without preventing them from reacting when enemies are too close for their firing positions to be useful- very near to, or inside the building. You can choose to disable reaction if you don't want the additional overhead.

//Usage:
//null = [this, "UP", true] execVM "ptg_garrison.sqf";

//When should garrisoned units check for close enemies? In seconds.
_INTERVAL = 5;
//How close should an enemy be before they abandon their position? In meters.
_RANGE = 8;
//Fake defines so you can just execVM from init.

hint "start";
_unit = _this select 0;
_stance = _this select 1;	//"UP" "DOWN" "Middle"
_react = _this select 2;	//Should they abandon their positions when enemies are very close?

_unit setUnitPos _stance;	//Set their stance
_unit forceSpeed 0;		//Prevent them from moving, but let them look around.

if(_react) then
{
	hint "react";
	_quit = false;
	while{!_quit} do
	{
		sleep _INTERVAL;
		_nme = _unit findNearestEnemy _unit;
		if(_unit distance _nme < _RANGE) then
		{
			_unit forceSpeed -1;	//Allow movement again.
			_quit = true;
			hint "out";
		}
	}
}