Line Of Sight (Example Thread)

[SaOk]

For the AI functions in Zub mission, I am looping nearEntities check in about every 3. second ((getposATL _z) nearEntities [["Ins_Soldier_Base","RU_Soldier_Base","CDF_Soldier_ Base","GUE_Soldier_Base"],120]). You could loop it for 50m, when check the LOS´s. Already much less units to count that then. E.g. you could check the nearentities for group leader, then what enemies he see and then stop group.

Edit: Or try nearTargets.

[tpw]

SaOK, that's a really excellent implementation of the new lineintersects function.

I tried your formula in a very small script which just makes AI units in the player's group kneel/crouch if they have line of sight of an enemy less than 150m away. Seems to work pretty well and doesn't cripple the computer.

Uncommenting this line: //0 = _unit fireAtTarget [_enemy]; , and decreasing the sleep =10 to sleep=1 or less, might also help in CQB as per maturin's suggestion

//UNITS IN PLAYER"S GROUP WILL AUTOMATICALLY KNEEL/CROUCH IF THEY HAVE LINE OF SIGHT OF NEAR ENEMIES
// Original idea by SaOK

//Enemies within 150m of unit
_nearenemies = 
{
_unit = _this select 0;
_nearunits = nearestobjects [_unit,["man"],150];
    {
    if (side _x == east) then {[_unit, _x] call _los};
    } foreach _nearunits;
};

//Does unit have line of sight with enemy?
_los = 
{
_unit = _this select 0;
_enemy = _this select 1;
if (((abs(([_unit, _enemy] call BIS_fnc_dirTo) - direction _unit)) <= 90 || (abs(([_unit, _enemy] call BIS_fnc_dirTo) - direction _unit)) >= 270) && !(lineIntersects [[getposASL _enemy select 0, getposASL _enemy select 1,(getposASL _enemy select 2)+((_enemy selectionPosition "pilot") select 2)],[getposASL _unit select 0, getposASL _unit select 1,(getposASL _unit select 2)+((_unit selectionPosition "pilot") select 2)]])) then 
    {
    _unit setunitpos "MIDDLE";
    //0 = _unit fireAtTarget [_enemy];
    };
};

//Main loop
while {true} do 
{
    {
    _x setunitpos "UP";
    [_x] call _nearenemies;
    } foreach units group player;
sleep 10;
}; 

[Mad_Cheese]

awesome!!!

[Mr. Charles]

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.

Would be even better, if it'd check how much of one's body is in LOS. If you stick the tip of your head up behind a window the AI shouldn't magically shoot you in the head, when it isn't aware of you.

[Orcinus]

@Saok & tpw:

Splendid developments, thanks for sharing.

Hee, these new commands look like making a number of neat developments possible; particularly amusing as a couple of posters immediately labelled them "useless" in the beta thread.

[Xeno]

Not the best video quality, but lineIntersects is not limited to AI stuff
(I have another video but I'm too lazy to upload it)

Please watch fullscreen and in HD



Edit: lineIntersects is called 30 times per frame in this example.

Xeno

[Mad_Cheese]

does anyone have an idea when the official 1.61 will be released?

[Kremator]

Ummm what has this got to do with the lineIntersects?

The full patch will be out when it is ready TM

[Mad_Cheese]

Ummm what has this got to do with the lineIntersects?

The full patch will be out when it is ready TM

just asked because the commands only work with the beta for now. sorry for pushing this in here

[SaOk]

I updated the first post with example mission and updated the code to follow new eyePos command that is less heavy than the earlier method to get head´s position. Also added terrain check but it dosent seem to work for at least desert map. But the example works normally with objects/vegetarion/houses.