Can AI handle moving in a steerable parachute?

[Micha73 0]

Hi all,

 

Another question: When any AI unit does a parachute jump, they just seem to hold their position and not be able to move anywhere. Any group commands such as "Move to" or "Form up/Rejoin Formation" don't have any effect other than the AI reporting in the negative.

 

That's a bit sad, because it prevents the AI from doing proper HAHO (high altitude, high opening) jumps. Is it really only possible to do this as a player? Or is there any way to get them to move somewhere (equivalent to players using WASD keys)?

 

Cheers,

 

M.

[Ibragim A 163]

I don't know how practical this will be, but you can try using the setVelocityModelSpace command. The result may be unexpected.

[panther42 53]

It can be done.  I've used an edited script of mando_chute.

Easiest way to show implemented is to download @Beerkan Simple ParaDrop Script (latest version).

Replace eject.sqf with the following code.  I have only edited a bit and added the edited mando_chute (all credits to Beerkan & Mandoble) for demonstration:

Spoiler

/*
    Filename: Simple ParaDrop Script v0.99d eject.sqf
    Author: Beerkan
   
    Description:
     A Simple Paradrop Script
    Parameter(s):
    0: VEHICLE  - vehicle that will be doing the paradrop (object)
    1: ALTITUDE - (optional) the altitude where the group will open their parachute (number)
    2: CARGOITEM - (optional) the item or ammocrate you wish to paradrop with the paras
   
   Working Example without Cargo
   0 = [UH80, 100] execVM "eject.sqf"

   Working Example with Supply Crate
   0 = [UH80,150,"B_supplyCrate_F"] execVM "eject.sqf"

   Working example with Prowler Vehicle
   0 = [UH80,150,"B_T_LSV_01_armed_F"] execVM "eject.sqf"

*/ 

if (!isServer) exitWith {};
params [["_vehicle",objnull],["_chuteheight",100],["_item",nil]];
private ["_paras","_landZone","_crew","_dir"];
//_vehicle = _this select 0;
//_chuteheight = if ( count _this > 1 ) then { _this select 1 } else { 100 };// Height to auto-open chute.
//_item = if ( count _this > 2 ) then {_this select 2} else {nil};// Cargo to drop, or nothing if not selected.
_paras = [];
_landZone = getMarkerPos "mk_land";
_crew = crew _vehicle;
{
	private _iscrew = assignedVehicleRole _x;
	if(count _iscrew > 0) then
	{
		if((_iscrew select 0) == "Cargo") then
		{
			_paras pushback _x
		};
	};
} foreach _crew;

//_vehtype = typeof _vehicle;

 //HintSilent composeText [parsetext format["<t size='1'  font='Zeppelin33' shadow = '2' align='left' color='#f0e68c'>Para Units found = <t color='#ff0000'>%1",count _paras]];//Debug

_vehicle allowDamage false;
_dir = direction _vehicle;

/*
//Animate Vehicle Doors to open

If (typeof _vehicle in ["B_Heli_Transport_01_F","B_Heli_Transport_01_camo_F"," B_CTRG_Heli_Transport_01_tropic_F","B_CTRG_Heli_Transport_01_sand_F"]) then
 {_vehicle animateDoor ['door_R',1];_vehicle animateDoor ['door_L',1]};

If (typeof _vehicle in ["I_Heli_Transport_02_F"]) then {_vehicle animateDoor ["CargoRamp_Open",1]};

If (typeof _vehicle in ["B_T_VTOL_01_infantry_F","B_T_VTOL_01_vehicle_F","B_T_VTOL_01_armed_F","B_T_VTOL_01_infantry_blue_F","B_T_VTOL_01_infantry_olive_F","B_T_VTOL_01_vehicle_blue_F","B_T_VTOL_01_armed_blue_F","B_T_VTOL_01_armed_olive_F"]) then {_vehicle animateDoor ["Door_1_source",1]};

If (typeof _vehicle in
["RHS_UH60M_MEV","RHS_UH60M_d"]) then {_vehicle animateDoor ["DoorLB",1];_vehicle animateDoor ["DoorRB",1]};

If (typeof _vehicle in
["B_Heli_Transport_03_F","B_Heli_Transport_03_unarmed_F","B_Heli_Transport_03_black_F","B_Heli_Transport_03_unarmed_green_F"])
then {_vehicle animateDoor ["door_rear_source", 1, false]};
*/

sleep 2;

ParaLandSafe =
{
    params ["_unit","_chuteheight","_landZone"];
    
    (vehicle _unit) allowDamage false;
    if (isPlayer _unit) then {[_unit,_chuteheight] spawn OpenChute};//Set AutoOpen Chute if unit is a player
	[_unit, _landZone, 20] spawn p42_mando_chute;
    waitUntil { isTouchingGround _unit || (position _unit select 2) < 1 };
    _unit action ["eject", vehicle _unit];
    sleep 1;
    _unit setUnitLoadout (_unit getVariable ["Saved_Loadout",[]]);// Reload Saved Loadout
    _unit allowdamage true;// Now you can take damage.
};

OpenChute =
{
    params ["_paraUnit", "_chuteheight"];
    
    waitUntil {(visiblePosition _paraUnit select 2) <= _chuteheight};
    If (vehicle _paraUnit IsEqualto _paraUnit ) then {_paraUnit action ["openParachute", _paraUnit]};//Check if chute is open, if not open it.
};

p42_mando_chute =
{
	/*
		mando_chute.sqf v1.1
		by Mandoble - edited by panther42 2014

		Moves a chute to the landing position

		Parameters:
		unit ejecting: a soldier.
		target position: a 2D or 3D map position.
		radius from target, max distance from target position to aim.
		Type of chute to be used (its class),"" if you dont care.

		Ex.:
		[chuteman, getMarkerPos "mk_land", 20] execVM "p42_mando_chute.sqf";
	*/

	params ["_man","_target_pos","_rad"];
	private["_chuto", "_deg_sec", "_dir", "_ang", "_posc", "_dif", "_difabs", "_turn", "_hspd", "_max_spd", "_deltatime", "_timeold", "_vx", "_vy", "_vh", "_vz", "_acc", "_cone", "_type", "_vvel", "_vdir", "_vup"];
	
	if (count _target_pos == 2) then
	{
		_target_pos append [0];
	};
	_ang = random 360;
	_target_pos = [(_target_pos select 0)+sin(_ang)*_rad,(_target_pos select 1)+cos(_ang)*_rad, 0];

	Sleep 1;
	_deg_sec = 30;
	_max_spd = 4;
	_hspd = _max_spd;
	_acc = 2;
	_vh = 0;
	_vz = -3;
	waitUntil {(vehicle _man != _man) || (!alive _man)};
	if (!alive _man) exitWith {};

	_chuto = vehicle _man;
	_timeold = time;
	_dir = getDir _chuto;
	_chuto setDir _dir;

	while {alive _man && ((visiblePosition _chuto select 2) > 5)} do
	{
		_deltatime = (time-_timeold) max 0.001;
		_timeold = time;
	   
		_posc = visiblePositionASL _chuto;
		_ang = ((_target_pos select 0) - (_posc select 0)) atan2 ((_target_pos select 1) - (_posc select 1));
		if (([_target_pos select 0, _target_pos select 1, 0] distance [_posc select 0, _posc select 1, 0]) > (visiblePosition _chuto select 2)) then
		{
			if ((_vz + 0.5*_deltatime) < -1.5) then
			{
				_vz = _vz + 0.5*_deltatime;
			};
		}
		else
		{
			if ((_vz - 0.5*_deltatime) > -3) then
			{
				_vz = _vz - 0.5*_deltatime;
			};
		};

		_dif = (_ang - _dir);
		if (_dif < 0) then {_dif = 360 + _dif;};
		if (_dif > 180) then {_dif = _dif - 360;};
		_difabs = abs(_dif);

		if (_difabs > 0.01) then
		{
			_turn = _dif/_difabs;
		}
		else
		{
			_turn = 0;
		};

		_dir = _dir + (_turn * ((_deg_sec * _deltatime) min _difabs));

		if (_vh < _hspd) then
		{
			_vh = _vh + (_acc * _deltatime);
		}
		else
		{
			if (_vh > _hspd) then
			{
				_vh = _vh - (_acc * _deltatime);  
			};
		};

		if (_difabs > 45) then
		{
			_hspd = _max_spd / 3;
		}
		else
		{
			_hspd = _max_spd;
		};

		_chuto setVectorDirAndUp [[sin _dir,cos _dir,0],[0,0,1]];
		_chuto setVelocity [sin(_dir)*_vh, cos(_dir)*_vh, _vz];
		
		Sleep 0.01;
	};
};

{
    _x setVariable ["Saved_Loadout",getUnitLoadout _x];// Save Loadout
    removeBackpack _x;
    _x disableCollisionWith _vehicle;// Sometimes units take damage when being ejected.
    _x allowdamage false;// Good Old Arma, they still can take damage on Vehcile exit.
    unassignvehicle _x;
    moveout _x;
    _x setDir (_dir + 90);// Exit the chopper at right angles.
    _x setvelocity [0,0,-5];
    sleep 0.3;//space the Para's out a bit so they're not all bunched up.
    _x addBackPack "B_parachute";// Add parachute on exit of _vehicle. AI will immediately open it, players can open it at any height above _chuteheight
	[_x,_chuteheight,_landZone] spawn ParaLandSafe;	
} forEach _paras;

if (!isNil ("_item")) then
{
	_CargoDrop = _item createVehicle getpos _vehicle;
	_CargoDrop setPos [(position _vehicle select 0) - (sin (getdir _vehicle)* 15), (position _vehicle select 1) - (cos (getdir _vehicle) * 15), (position _vehicle select 2)];
	clearMagazineCargoGlobal _CargoDrop;clearWeaponCargoGlobal _CargoDrop;clearItemCargoGlobal _CargoDrop;clearbackpackCargoGlobal _CargoDrop;
	[objnull, _CargoDrop] call BIS_fnc_curatorobjectedited;
	_CargoDrop addaction ["<t color = '#00FF00'>Open Virtual Arsenal</t>",{["Open",true] call BIS_fnc_arsenal;}];
};

_vehicle allowDamage true;

 

Open the mission in the editor.

Place a marker on the ground, near you, or wherever close so you can see, and name it mk_land.

Save the mission.

Play and observe where the AI troops steer/land.

 

You can edit/use as you see fit.  This was just a "throw together something quick" for demo purpose.