Hi, I'm trying to use the profiled unit detection part of the script snippets to make a sort of "firefight detector" script.
The basic premise is that it needs to detect when Blufor and Opfor units are within approximately 300m of each other and move or create a marker at that location to indicate to the player that friendly units are engaged.
So far I can create a trigger that will activate if both friendly and enemy units are present within it, but to use this I'd have to fill the entire map area with duplicates of this trigger and I'd get weird behavior if the units were across a trigger boundary.
The code I'm using is this: ((count ([getposATL thisTrigger, 50, ["EAST","entity"]] call ALIVE_fnc_getNearProfiles)) > 0);. Does anybody know of a way to modify or utilize this in a way that would allow me to check each friendly profile on the map for enemy profiles within 300m, and then move a marker to the friendly profile in question.
Thanks.

Fantastic, thanks for that. I'll try it out tonight when I get home from work.

I've tried it, it's excellent. I'm using one second in the init.sqf and 0.5 seconds in the main code which gives a flashing effect that is brilliant. What I'd like to do is disable this for the player, but changing it to this doesn't seem to work if (!isPlayer _profile) then { _profile = [ALIVE_profileHandler, 'getProfile', _x] call ALIVE_fnc_profileHandler; _position = [_profile, 'position', []] call CBA_fnc_HashGet; }; in fact it breaks the scrip completely and no markers are displayed.
Any ideas how to get that to work? The problem it causes is that it gives the player an indication any time an enemy is within 300m, which is not something I'd want.

I've copied that in from your edited original and it's still displaying on the player.
In the missions that I'm making for this I don't ever join AI squads, so if that method would be dependent on doing so then it wouldn't work for me, but it might be of use to other people.

That's still showing on the player. Unfortunately this has gone past my understanding of scripting so it's difficult for me to work out what's going on with it. I'm an engineer, I'm really not much of a coder.
Deleting the marker if the player is within range might actually be better though, as if the player is within range they should have to work out the exact location themselves rather than getting a marker to exactly where they need to go. How would that be done?

My init.sqf currently reads:

[{
["rhs_faction_usarmy_d","rhs_faction_usmc_d"] execVM "Scripts\contact.sqf";
}, 1, []] call CBA_fnc_addPerFrameHandler;

I've changed the waitUntil line to read:

waitUntil {sleep 0.5; (Servertime - _startTime >= 0.45) or (({_x distance (getMarkerPos _marker) < 300} count ([] call BIS_fnc_listPlayers)) > 0)};

When the player is within 300m it displays the normal (flashing once every second) behavior on all units including the player. When the player is outside of that distance the markers are spawned but not deleted, and they duplicate at the rate of one every second.
I'm a bit lost with this, so reporting what I'm seeing is about as much useful input as I can manage.

Ok, I think I've got it. I moved the player detection part to make the entire code this:

private ["_factions"];
_factions = _this;

//-- Get profile id's
_profileIDs = [];
{
	_profileIDs = _profileIDs + ([ALIVE_profileHandler, "getProfilesByFaction",_x] call ALIVE_fnc_profileHandler);
} foreach _factions;

//-- Define delete function
_fnc_deleteMarkerTimer = {
	_marker = _this;
	sleep 0.5;
	deleteMarker _marker;
};


//-- Get profile position and execute check
{
	//-- Get profile and it's position
	_profile = [ALIVE_profileHandler, 'getProfile', _x] call ALIVE_fnc_profileHandler;
	_position = [_profile, 'position', []] call CBA_fnc_HashGet;

	//-- Check for enemies
	if (((count ([_position, 300, ["EAST","entity"]] call ALIVE_fnc_getNearProfiles)) > 0)) then {
		_marker = createMarker [(format ["%1", random 200]), _position];
		_marker setMarkerType "mil_warning";
		_marker setMarkerText "Troops In Contact";
		_marker setMarkerColor "ColorOPFOR";
		_marker spawn _fnc_deleteMarkerTimer;
		if (({_x distance (getMarkerPos _marker) < 300} count ([] call BIS_fnc_listPlayers)) > 0) then {
		deleteMarker _marker;
		};
	};
} forEach _profileIDs;

It works like that. The markers display correctly (flashing) when the player is outside 300m. When the player moves to within 300m all markers are removed. That's exactly what I wanted.

Thanks a lot for this, it's going to be really helpful in my mission for helping players get into the action.

Yeah, I can confirm that that works as well, and as you say it's a more efficient way of doing it.
It's also nice that the two radii can be different if desired, so you can remove the markers if the player is within 1k but detect troops in contact with enemy within 300m.
Running it every 1s makes for a fantastic flashing effect that really draws attention to the marker, and I like the fact that it can be active at multiple locations simultaneously. It could also be used as a FLOT indicator easily by changing the marker type and duration.

As I said, thanks a lot for this, it's going to add a lot to my scenario (which I really should post here somewhere if I ever stop fiddling with it!).

Just a quick one, if I change the marker name to a global instead of local (so "_marker" to "marker", would that restrict it to one marker at a time? That would actually be quite handy.