Line Of Sight (Example Thread)

[SaOk]

Newer vid (by McLupo) with eye direction demonstration:


Here is example of the new LOS commands that came with the recent beta. I have two units on map (AI named b, player a) and functions module placed on map. LOS is counted for eye positions and eye directions for AI . Use, edit & expand freely.

Requires Beta 94103 or newer.

LOS.sqf:

private ["_a","_b","_dirTo","_eyeD","_eyePb","_eyePa","_eyeDV"];
//Player
_a = _this select 0;
//AI to see or not
_b = _this select 1;
while {true} do {
_eyeDV = eyeDirection _b;
_eyeD = ((_eyeDV select 0) atan2 (_eyeDV select 1));
if (_eyeD < 0) then {_eyeD = 360 + _eyeD};
_dirTo = [_b, _a] call BIS_fnc_dirTo;
_eyePb = eyePos _b;
_eyePa = eyePos _a;
if ((abs(_dirTo - _eyeD) >= 90 && (abs(_dirTo - _eyeD) <= 270)) || (lineIntersects [_eyePb, _eyePa]) ||(terrainIntersectASL [_eyePb, _eyePa])) then {
hintsilent "NOT IN SIGHT";
} else {
hintsilent "IN SIGHT";
};
sleep 0.1;
};

LOSforSingleCheck.sqf:

private ["_a","_b","_dirTo","_eyeD","_eyePb","_eyePa","_eyeDV"];
//Player
_a = _this select 0;
//AI to see or not
_b = _this select 1;
_eyeDV = eyeDirection _b;
_eyeD = ((_eyeDV select 0) atan2 (_eyeDV select 1));
if (_eyeD < 0) then {_eyeD = 360 + _eyeD};
_dirTo = [_b, _a] call BIS_fnc_dirTo;
_eyePb = eyePos _b;
_eyePa = eyePos _a;
if ((abs(_dirTo - _eyeD) >= 90 && (abs(_dirTo - _eyeD) <= 270)) || (lineIntersects [_eyePb, _eyePa]) ||(terrainIntersectASL [_eyePb, _eyePa])) then {
hintsilent "NOT IN SIGHT";
} else {
hintsilent "IN SIGHT";
};

https://www.dropbox.com/s/5644ns4x9o...ht.Desert_E.7z

[PELHAM]

Excellent work! Looks like it will be usefull for AI behavioural FSM's?

[ruebe]

Excellent!

[DaveP]

Makes me want to make a Metal Gear Solid style "Huh, what was that noise?" sound that's played whenever you enter LOS

[Hellfire257]

Very impressive! Thank-you for sharing.

[CameronMcDonald]

Combined with knowsabout that could come in handy for tweaking AI reaction in stealth missions. Nicely!

[Rydygier]

Very interesting. Must to try this, wneh official, stable patch with this commands will be released. Just looking for most efficient way for doing similar things, and want to compare this with some sqf solutions. One of the most exciting scripting topic for me, but rather for some kind of overall, wide sector FOV checks, than for strictly, precise LOS test between two guys/objects/positions.

[Phazon]

I can see this potentially solving quite a few issues. The main one I can think of is AI shooting heavy machineguns while standing or kneeling that should only be shot while prone. A script could be setup to force the AI to go prone when it detects an enemy within a certain range while also maintaining line of sight. If it loses line of sight it goes back out of prone and back to its normal behaviour.

[SaOk]

I released new version 1.9 for my Zub mission featuring these LOS/Body Direction commands. You can find it here if interested:
http://forums.bistudio.com/showthrea...ssions-by-SaOk

In the mission, bodies need to be now seen to be spotted. Civilians react on dead bodies for player if he is getting too close (if seeing those). Also checks are made, that certain things are not seen - friendly side and captives are not acting like blind now or all seeing in certain events.

[maturin]

I think the biggest problem this could solve would be forcing AI to stop and shoot at units he has line of sight to that are under 50m away. If the scripts works instantly or close to it, the AI could actually be aware and competent in urban CQB.