Detect players entering and exiting area

usbstuck · February 4, 2015

Hi all,

I'm trying to figure out the best way to keep track of players (MP compatible) entering and exiting an area.

When they are entering I want to add actions to the unit, when exiting i want to remove them.

I've been fiddling around with triggers for the better part of yesterday :) but it's quite tricky. I wonder if a trigger is actually the best way to do this, because the onDeactivation will only fire if all units are out of the area..

To sum up, my questions:

- Is a trigger the right tool?

- If it is, how can I fire the deactivate trigger for units leaving the area? (see all the way below @ PROBLEM)

More info:

Currently I'm not at home so I can't share the code I have so far, but I'll write it down in pseudo code below:

(the adding part works)

UNITS_IN_AREA = [];

RESET_TRIGGER = true; // this makes it repeatable

areaTrigger = [Repeating trigger set in mission builder, so it has static position and triggerArea]

areaTrigger condition = ({_x in thisList} count (playableUnits + switchableUnits) > 0) && RESET_TRIGGER

areaTrigger onActivation = [thisList] call addScript.sqf; RESET_TRIGGER = false; // bottom of addScript sets RESET_TRIGGER = true;

areTrigger onDeactivation = [thisTrigger] call removeScript.sqf;

addScript.sqf

- adds units in thisList to UNITS_IN_AREA

- adds actions to the units

removeScript.sqf

- should remove units from UNITS_IN_AREA that are no longer in the trigger area

- should remove actions from these units

PROBLEM: Issue here is we don't have a thisList magic variable. A workaround is using nearestObjects with range of triggerArea, but range is circular and a trigger can be ellipse or rectangular

Edited February 10, 2015 by usbStuck

Schatten · June 27, 2014

You can use https://community.bistudio.com/wiki/BIS_fnc_inTrigger for triggers or my function for markers.

usbstuck · February 4, 2015

Thanks Schatten, I'll give that a try!

It's probably best though to combine it with a trigger and onAct check if there's a player in the trigger/marker area. Otherwise I'd have to continuously do the check and that feels like a waste of system resources.

killzone_kid · March 28, 2013

use

tr triggerAttachVehicle [player]

activation -> present

on act -> add action

ondeact -> remove action

usbstuck · February 4, 2015

Hmm looks like that would considerably reduce my current code.. (still a lot to learn)

triggerAttachVehicle seems to take an array, so I could add an array of all playables. Will this trigger deactivation for each?

Well guess I find out tonight.

Thanks Killzone_Kid!

fn_Quiksilver · April 5, 2013

use
tr triggerAttachVehicle [player]

activation -> present

on act -> add action

ondeact -> remove action

Does triggerAttachVehicle work if the player enters the cargo seat of another vehicle? Have experienced issues with that a long time ago.

killzone_kid · March 28, 2013

Hmm looks like that would considerably reduce my current code.. (still a lot to learn)
triggerAttachVehicle seems to take an array, so I could add an array of all playables. Will this trigger deactivation for each?

Well guess I find out tonight.

Thanks Killzone_Kid!

No, you can only attach single unit even though it looks like it should be more. Welcome to Arma.

usbstuck · February 4, 2015

Eventually got it to work using Schatten's suggestion. Still had to do a lot of coding though!

Thanks all for the help

If ur interested, this is the result:

UNITS_IN_LONG_RANGE_AREA = [];

// `longRangeArea` is created in editor because it is in static position
// only the `triggerArea` is set in editor
// TODO: For MP missions with several factions, change first argument to "ANY" and change condition to
// this && {_x in thisList} count (playableUnits + switchableUnits) > 0
longRangeArea setTriggerActivation [format ["%1", side player], "PRESENT", true]; // SETTING
longRangeArea setTriggerStatements [
 "this",
 "[thisTrigger] spawn checkLongRangeArea",
 "[] spawn clearLongRangeArea"
];


/**
* Responsible for updating global UNITS_IN_LONG_RANGE_AREA
* and calling the respective add/remove functions if needed
* @param {Object:trigger}
*/
checkLongRangeArea = {
 private ["_trg", "_units", "_unit", "_inTriggerArea", "_unitAreaIndex", "_initialised"];

 _trg = _this select 0;
 _units = (playableUnits + switchableUnits); // SETTING

 diag_log "=> checkLongRangeArea";

 while {triggerActivated _trg} do {
   for "_i" from 0 to (count _units)-1 do {
     _unit = _units select _i;
     _inTriggerArea = [_trg, _unit] call BIS_fnc_inTrigger;
     _unitAreaIndex = [name _unit, UNITS_IN_LONG_RANGE_AREA] call arrayFindByFirstIndex;
     _initialised = _unitAreaIndex >= 0;

     // Unit has entered
     if (_inTriggerArea && !_initialised) then {
       _actions = [_unit] call addLongRangeActions;
       _unitArray = [name _unit, _unit, _actions];

       diag_log format ["Unit entered trigger area, add _unitArray: %1", _unitArray];
       UNITS_IN_LONG_RANGE_AREA = UNITS_IN_LONG_RANGE_AREA + [_unitArray];
       ["Long range options active", "hint", _unit] call BIS_fnc_MP;
     };

     // Unit has left
     if (!_inTriggerArea && _initialised && _unitAreaIndex >= 0) then {
       _unitArray = UNITS_IN_LONG_RANGE_AREA select _unitAreaIndex;
       [_unit, _unitArray select 2] spawn removeActions;

       diag_log format ["Unit left area, remove _unitArray: %1", _unitArray];
       UNITS_IN_LONG_RANGE_AREA = UNITS_IN_LONG_RANGE_AREA - [_unitArray];
       ["Long range options deactivated (leave)", "hint", _unit] call BIS_fnc_MP;
     };
   };

   sleep 1;
 };
};

/**
* Remove all unit arrays from global UNITS_IN_LONG_RANGE_AREA
* @return {void}
*/
clearLongRangeArea = {
 private ["_unit", "_actions"];

 diag_log "=> clearLongRangeArea";

 {
   if (typeName _x == "ARRAY" && count _x == 3) then {
     _unit = _x select 1;
     _actions =_x select 2;

     [_unit, _actions] spawn removeActions;
     ["Long range options deactivated (deac trigger)", "hint", _unit] call BIS_fnc_MP;
   };
 } forEach UNITS_IN_LONG_RANGE_AREA;

 UNITS_IN_LONG_RANGE_AREA = [];
};

/**
* Add actions to unit that are needed in "long range" area
* @param {Object} Unit that were set in `checkLongRangeArea`
*/
addLongRangeActions = {
 private ["_unit", "_actions"];

 _unit = _this select 0;

 diag_log format ["=> addLongRangeActions: for unit %1", _unit];

 _actions = [
   _unit addAction ["<t color='#ffff00'>Reset target vehicles</t>", "scripts\resetVehicles.sqf", nil, 0, false, true, "", "(_target == _this)"]
 ];

 _actions
};

/**
* Remove actions that unit needs in "long range" area
* @type {Object}
*/
removeActions = {
 private ["_unit", "_actions"];

 _unit = _this select 0;
 _actions = _this select 1;

 diag_log format ["=> removeActions: for unit %1", _unit];

 if (typeName _actions == 'ARRAY') then {
   for "_j" from 0 to (count _actions)-1 do {
     _unit removeAction (_actions select _j);
   };
 };
};

Referenced function arrayFindByFirstIndex.sqf:

/**
* Searches array (1) and returns the index of nested array of which the first element matches search (0)
* Example:
* arr = [
*   ['one', 1],
*   ['two', 2]
* ]
*
* ['one', arr] call arrayFindByFirstIndex; // returns 1
*
* @params {any} search this
* @params {array} in multi-dimensional array
* @return {scalar} index If not found: -1
*/
private ["_search", "_array", "_index"];

_search = _this select 0;
_array = _this select 1;
_index = -1;

if (count _array > 0 && typeName (_array select 0) != 'ARRAY') exitWith {
diag_log format ["ERROR => arrayFindByFirstIndex: array is not multi-dimensional: (%1)", _array];
	_index;
};

{
 scopeName "loop";
 if ((_x select 0) == _search) then {
   _index = _forEachIndex;
   breakOut "loop";
 };
} forEach _array;

_index

Edited February 10, 2015 by usbStuck

killzone_kid · March 28, 2013

[color="#FF8040"]playerAddActions [color="#8B3E2F"][b]=[/b][/color] [color="#8B3E2F"][b]{[/b][/color]
[color="#8B3E2F"][b][[/b][/color]
	[color="#000000"]player[/color] [color="#191970"][b]addAction[/b][/color] [color="#8B3E2F"][b][[/b][/color][color="#7A7A7A"]"<t color='#ffff00'>Reset target vehicles 1</t>"[/color][color="#8B3E2F"][b],[/b][/color] [color="#7A7A7A"]"scripts\resetVehicles.sqf"[/color][color="#8B3E2F"][b],[/b][/color] [color="#000000"]nil[/color][color="#8B3E2F"][b],[/b][/color] [color="#FF0000"]0[/color][color="#8B3E2F"][b],[/b][/color] [color="#000000"]false[/color][color="#8B3E2F"][b],[/b][/color] [color="#000000"]true[/color][color="#8B3E2F"][b],[/b][/color] [color="#7A7A7A"]""[/color][color="#8B3E2F"][b],[/b][/color] [color="#7A7A7A"]"(_target == _this)"[/color][color="#8B3E2F"][b]][/b][/color][color="#8B3E2F"][b],[/b][/color]
	[color="#000000"]player[/color] [color="#191970"][b]addAction[/b][/color] [color="#8B3E2F"][b][[/b][/color][color="#7A7A7A"]"<t color='#ffff00'>Reset target vehicles 2</t>"[/color][color="#8B3E2F"][b],[/b][/color] [color="#7A7A7A"]"scripts\resetVehicles.sqf"[/color][color="#8B3E2F"][b],[/b][/color] [color="#000000"]nil[/color][color="#8B3E2F"][b],[/b][/color] [color="#FF0000"]0[/color][color="#8B3E2F"][b],[/b][/color] [color="#000000"]false[/color][color="#8B3E2F"][b],[/b][/color] [color="#000000"]true[/color][color="#8B3E2F"][b],[/b][/color] [color="#7A7A7A"]""[/color][color="#8B3E2F"][b],[/b][/color] [color="#7A7A7A"]"(_target == _this)"[/color][color="#8B3E2F"][b]][/b][/color][color="#8B3E2F"][b],[/b][/color]
	[color="#000000"]player[/color] [color="#191970"][b]addAction[/b][/color] [color="#8B3E2F"][b][[/b][/color][color="#7A7A7A"]"<t color='#ffff00'>Reset target vehicles 3</t>"[/color][color="#8B3E2F"][b],[/b][/color] [color="#7A7A7A"]"scripts\resetVehicles.sqf"[/color][color="#8B3E2F"][b],[/b][/color] [color="#000000"]nil[/color][color="#8B3E2F"][b],[/b][/color] [color="#FF0000"]0[/color][color="#8B3E2F"][b],[/b][/color] [color="#000000"]false[/color][color="#8B3E2F"][b],[/b][/color] [color="#000000"]true[/color][color="#8B3E2F"][b],[/b][/color] [color="#7A7A7A"]""[/color][color="#8B3E2F"][b],[/b][/color] [color="#7A7A7A"]"(_target == _this)"[/color][color="#8B3E2F"][b]][/b][/color]
[color="#8B3E2F"][b]][/b][/color]
[color="#8B3E2F"][b]}[/b][/color][color="#8B3E2F"][b];[/b][/color]

longRangeArea [color="#191970"][b]setTriggerActivation[/b][/color] [color="#8B3E2F"][b][[/b][/color][color="#7A7A7A"]"VEHICLE"[/color][color="#8B3E2F"][b],[/b][/color] [color="#7A7A7A"]"PRESENT"[/color][color="#8B3E2F"][b],[/b][/color] [color="#000000"]true[/color][color="#8B3E2F"][b]][/b][/color][color="#8B3E2F"][b];[/b][/color]
longRangeArea [color="#191970"][b]triggerAttachVehicle[/b][/color] [color="#8B3E2F"][b][[/b][/color][color="#000000"]player[/color][color="#8B3E2F"][b]][/b][/color][color="#8B3E2F"][b];[/b][/color]
longRangeArea [color="#191970"][b]setTriggerStatements[/b][/color] [color="#8B3E2F"][b][[/b][/color]
 [color="#7A7A7A"]"this"[/color][color="#8B3E2F"][b],[/b][/color]
 [color="#7A7A7A"]"thisTrigger setVariable ['actions', call playerAddActions]"[/color][color="#8B3E2F"][b],[/b][/color]
 [color="#7A7A7A"]"{player removeAction _x} forEach (thisTrigger getVariable ['actions', []])"[/color]
[color="#8B3E2F"][b]][/b][/color][color="#8B3E2F"][b];[/b][/color]
[/color]

Made with KK's SQF to BBCode Converter

I don't know if you seen this: http://killzonekid.com/arma-scripting-tutorials-triggers/

usbstuck · February 4, 2015

I did read the post on your blog. Your blog is a great resource btw, cheers.

Your code above is awesomely simple, but do I understand it correctly if this will be executed on every users computer?

The command reference states this:

NOTE: Triggers in multiplayer are global objects and therefore should only be created on the server. Creating trigger on a client will result in trigger becoming a dead weight transferred to the server when client logs out.

In terms of performance, wouldn't it be better to create all triggers on the server?

Still, I might have focussed on this too much, especially since your code is written in a fraction of the time that I spend writing mine.. :)

jshock · December 27, 2013

Yes triggers should be created on the server, but trigger are "arguments global" meaning (at least in this context) that when any player enters this trigger it should execute the given code, however, triggers are "effects local", meaning that the code executed in onAct will only be ran on that specific client that executed the trigger.

Now the playerAddActions function should be defined locally for each player (not on the server) so they have access to that information when they execute the given code from the trigger

usbstuck · February 4, 2015

Thanks that cleared things up.

Well, writing all that code, even though I might not use it now, at least gave me a thorough understanding of sqf :)

fn_Quiksilver · April 5, 2013

Just a note, triggers created in the editor will be created on every clients machine and the server machine, in a dedicated environment.

killzone_kid · March 28, 2013

editor triggers are created on server only

fn_Quiksilver · April 5, 2013

editor triggers are created on server only

One would think so, but they fire locally when triggered by players, this is not possible if server-only. Mission.sqm is global and they load on the client during init process.

Schatten · June 27, 2014

http://killzonekid.com/arma-scripting-tutorials-triggers-v3/.

killzone_kid · March 28, 2013

One would think so, but they fire locally when triggered by players, this is not possible if server-only. Mission.sqm is global and they load on the client during init process.

One would know so.

fn_Quiksilver · April 5, 2013

Interesting ... I hope you are right. :)

http://feedback.arma3.com/view.php?id=16923

This is intended behavior and it's consistent with those of other objects, like soldiers or vehicles.

createTrigger is analogous to createVehicle, not createVehicleLocal. It makes sense the trigger is created on every computer including server, but remains local to whoever created it. Once that machine disconnects, locality is naturally passed to the server.

As for trigger statements - one must remember that while trigger is created globally, setTriggerStatements and other trigger commands are local.

Runs contrary to:

Editor based triggers (mission.sqm Sensors) are indeed created only on the server

How does this work then:

A single server trigger can be used by all clients as well as the server

So this server-side trigger from mission.sqm is evaluating only on the server when I--the client--activate it (say by entering the radius), then its sending me over the network, the onAct code to run locally on my machine only?

This does not quite make sense...

EDIT:

I can slow a server right down (1-3 fps), yet the trigger sensor has no scheduling delay at all. One would expect, if the evaluation is server-side only, that I would expect some delay. This is not the case, leading me to suspect the evaluation thread is running on each client irrespective of server.

Edited February 11, 2015 by MDCCLXXVI

killzone_kid · March 28, 2013

I see where the confusion comes from. Every global object is obviously 1 master object at the location where it was created and many slave copies at other locations. But it is still ONE object. Your note seemed to imply that editor trigger will be a separate object on every client. At least this is how it came across, and this is what I would have thought from reading it if I didn't know better.

fn_Quiksilver · April 5, 2013

I see where the confusion comes from. Every global object is obviously 1 master object at the location where it was created and many slave copies at other locations. But it is still ONE object. Your note seemed to imply that editor trigger will be a separate object on every client. At least this is how it came across, and this is what I would have thought from reading it if I didn't know better.

Yes I was on a different page.

One thing that is unclear to me:

On which machine(s) is the evaluation thread? I believe there is an evaluation thread running on each clients machine, for triggers created through mission.sqm.

killzone_kid · March 28, 2013

conditions are local and independent. it is all on my blog

fn_Quiksilver · April 5, 2013

Hmm...

So are editor-defined triggers evaluating also on the server machine? I see now that createTrigger is only called on the server machine and it creates the EmptyDetector mission object, but you are saying the client reads the mission.sqm and then an evaluation thread is spawned with the defined conditions? This makes sense, and is how I'd expect it to work.

createTrigger in mission.sqm, spawns evaluation thread for each client (and server machine too?).

createTrigger in initServer.sqf, spawns evaluation thread only on server.

This is a slight digression, but if my goal is to reduce the number of evaluation threads, primarily on the server machine, it seems reasonable to only create the trigger where necessary (and if necessary), such as in initServer or initPlayerLocal root.

Say I create a scenario with 250 editor-created triggers in the mission.sqm. Is this 250 evaluation threads? (I expect so). And, is each connected machine (incl server) running these threads independently? I would hope the server machine is not running 250 eval threads if they are meant to be player conditional.

There are other benefits to using editor triggers, such as ease of use and being good enough for most purposes, the above is just an area I am unclear about, and also concerned about.

onedigita · January 7, 2014

I am trying to make a script that would tell opfor players with a hint 5 minutes after any west players enter a defined area. im not sure if a marker is possible or a trigger but ive never fooled around with triggers at all and im completely in the dark on this one.

Heeeere's johnny! · April 16, 2014

I haven't followed the discussion and just saw this thread, so pardon me if this might not be on the spot, but as I wanted to solve this very problem described in the thread title some while ago already, I've created this trigger condition thingy.

[color=#FF8040]fnc_triggerUnitsChanged [color=#8B3E2F][b]=[/b][/color]
[color=#8B3E2F][b]{[/b][/color]
   [color=#1874CD]_thisList[/color]        [color=#8B3E2F][b]=[/b][/color] [color=#000000]_this[/color] [color=#191970][b]select[/b][/color] [color=#FF0000]0[/color][color=#8B3E2F][b];[/b][/color]
   [color=#1874CD]_thisListPrev[/color]    [color=#8B3E2F][b]=[/b][/color] [color=#000000]_this[/color] [color=#191970][b]select[/b][/color] [color=#FF0000]1[/color][color=#8B3E2F][b];[/b][/color]

   [color=#8B3E2F][b]{[/b][/color]
       [color=#006400][i]//for each entering unit[/i][/color]
   [color=#8B3E2F][b]}[/b][/color] [color=#191970][b]forEach[/b][/color] [color=#8B3E2F][b]([/b][/color][color=#1874CD]_thisList[/color] [color=#8B3E2F][b]-[/b][/color] [color=#1874CD]_thisListPrev[/color][color=#8B3E2F][b])[/b][/color][color=#8B3E2F][b];[/b][/color]

   [color=#8B3E2F][b]{[/b][/color]
       [color=#006400][i]//for each leaving unit[/i][/color]
   [color=#8B3E2F][b]}[/b][/color] [color=#191970][b]forEach[/b][/color] [color=#8B3E2F][b]([/b][/color][color=#1874CD]_thisListPrev[/color] [color=#8B3E2F][b]-[/b][/color] [color=#1874CD]_thisList[/color][color=#8B3E2F][b])[/b][/color][color=#8B3E2F][b];[/b][/color]
[color=#8B3E2F][b]}[/b][/color][color=#8B3E2F][b];[/b][/color]

[color=#1874CD]_trigger[/color] [color=#8B3E2F][b]=[/b][/color] [color=#191970][b]createTrigger[/b][/color] [color=#8B3E2F][b][[/b][/color][color=#7A7A7A]"EmptyDetector"[/color][color=#8B3E2F][b],[/b][/color] [color=#191970][b]getPosATL[/b][/color] [color=#000000]player[/color][color=#8B3E2F][b]][/b][/color][color=#8B3E2F][b];[/b][/color]
[color=#1874CD]_trigger[/color] [color=#191970][b]setTriggerArea[/b][/color] [color=#8B3E2F][b][[/b][/color][color=#FF0000]10[/color][color=#8B3E2F][b],[/b][/color] [color=#FF0000]10[/color][color=#8B3E2F][b],[/b][/color] [color=#FF0000]0[/color][color=#8B3E2F][b],[/b][/color] [color=#000000]false[/color][color=#8B3E2F][b]][/b][/color][color=#8B3E2F][b];[/b][/color]
[color=#1874CD]_trigger[/color] [color=#191970][b]setTriggerActivation[/b][/color] [color=#8B3E2F][b][[/b][/color][color=#7A7A7A]"ANY"[/color][color=#8B3E2F][b],[/b][/color] [color=#7A7A7A]"PRESENT"[/color][color=#8B3E2F][b],[/b][/color] [color=#000000]true[/color][color=#8B3E2F][b]][/b][/color][color=#8B3E2F][b];[/b][/color]
[color=#1874CD]_trigger[/color] [color=#191970][b]setVariable[/b][/color] [color=#8B3E2F][b][[/b][/color][color=#7A7A7A]"toggle"[/color][color=#8B3E2F][b],[/b][/color] [color=#000000]false[/color][color=#8B3E2F][b]][/b][/color][color=#8B3E2F][b];[/b][/color]
[color=#1874CD]_trigger[/color] [color=#191970][b]setTriggerStatements[/b][/color]
[color=#8B3E2F][b][[/b][/color]
   [color=#7A7A7A]"
       isServer
       &&
       {
           comment 'if thisList changed compared to previous check, do stuff';
           if !(thisList isEqualTo (thisTrigger getVariable ['thisList', []])) then
           {
               comment 'set list of last check to thisListPrev and thisList to current list';
               thisTrigger setVariable ['thisListPrev', +(thisTrigger getVariable ['thisList', []])];
               thisTrigger setVariable ['thisList', +thisList];

               comment 'toggle variable state';
               thisTrigger setVariable ['toggle', !(thisTrigger getVariable ['toggle', false])];
           };
           thisTrigger getVariable 'toggle'
       }
   "[/color][color=#8B3E2F][b],[/b][/color]
   [color=#7A7A7A]"
       [thisList, thisTrigger getVariable 'thisListPrev'] call fnc_triggerUnitsChanged;
       systemChat 'toggle activation';
   "[/color][color=#8B3E2F][b],[/b][/color]
   [color=#7A7A7A]"
       [thisTrigger getVariable 'thisList', thisTrigger getVariable 'thisListPrev'] call fnc_triggerUnitsChanged;
       systemChat 'toggle deactivation';
   "[/color]
[color=#8B3E2F][b]][/b][/color][color=#8B3E2F][b];[/b][/color]
[/color]

Kudos to Killzone_Kid for his SQF to BBCode Converter.

I've updated the code performance wise and couldn't test it yet, so if anyone should find this doesn't work properly, just fire away. :)

As for your problem, onedigita, this should be relatively easy if I understand you correctly:

[color=#FF8040][color=#1874CD]_trigger[/color] [color=#8B3E2F][b]=[/b][/color] [color=#191970][b]createTrigger[/b][/color] [color=#8B3E2F][b][[/b][/color][color=#7A7A7A]"EmptyDetector"[/color][color=#8B3E2F][b],[/b][/color] [color=#191970][b]getPosATL[/b][/color] [color=#000000]player[/color][color=#8B3E2F][b]][/b][/color][color=#8B3E2F][b];[/b][/color]    [color=#006400][i]//replace "getPosASL player" with any desired position[/i][/color]
[color=#1874CD]_trigger[/color] [color=#191970][b]setTriggerArea[/b][/color] [color=#8B3E2F][b][[/b][/color][color=#FF0000]10[/color][color=#8B3E2F][b],[/b][/color] [color=#FF0000]10[/color][color=#8B3E2F][b],[/b][/color] [color=#FF0000]0[/color][color=#8B3E2F][b],[/b][/color] [color=#000000]false[/color][color=#8B3E2F][b]][/b][/color][color=#8B3E2F][b];[/b][/color]    [color=#006400][i]//circle with a 10m radius; tilted by 0Â°; "false" for being a circle and not a rectangle[/i][/color]
[color=#1874CD]_trigger[/color] [color=#191970][b]setTriggerActivation[/b][/color] [color=#8B3E2F][b][[/b][/color][color=#7A7A7A]"WEST"[/color][color=#8B3E2F][b],[/b][/color] [color=#7A7A7A]"PRESENT"[/color][color=#8B3E2F][b],[/b][/color] [color=#000000]false[/color][color=#8B3E2F][b]][/b][/color][color=#8B3E2F][b];[/b][/color]    [color=#006400][i]//activated by "WEST" aka blufor units; activated only once (hence repeating is "false")[/i][/color]
[color=#1874CD]_trigger[/color] [color=#191970][b]setTriggerStatements[/b][/color]
[color=#8B3E2F][b][[/b][/color]
   [color=#7A7A7A]"isServer && this"[/color][color=#8B3E2F][b],[/b][/color]    [color=#006400][i]//using the keyword "this", the above statements will be considered for checking whether the trigger is (de)activated[/i][/color]
   [color=#7A7A7A]"
       comment 'This happens when the trigger is activated';
       0 = [] spawn
       {
           uiSleep 300;
           [['Blufor units have entered the area!', {hint _this;}], 'BIS_fnc_call', opfor, false, true] call BIS_fnc_MP;
       };
   "[/color][color=#8B3E2F][b],[/b][/color]
   [color=#7A7A7A]"comment 'This happens when the trigger is deactivated';"[/color]
[color=#8B3E2F][b]][/b][/color][color=#8B3E2F][b];[/b][/color][/color]

Edited February 19, 2015 by Heeeere's Johnny!
typo correction

onedigita · January 7, 2014

Thanks for the reply!

too clarify, I wanted say 1000m circular trigger around feruz abad, that when an opfor landed or drove into that area 5 minutes after that my opfor, which in my case is actually an indy faction would get a hint 5 minutes after and maybe even possibly a marker only visible to that side that bluf were spotted somewhere in that area. which looks right for most of it, im just not sure about the first part with the SetTriggerArea will it be the size of the marker i put in the editor or will it by those dimensions? ive never ever done a trigger before so its pretty new to me.

regardless thank you for taking your time to help me!

Detect players entering and exiting area

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