ACE3/addons/hellfire/functions/fnc_attackProfile.sqf

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/*
* Author: PabstMirror
* Hellfire attack profile. Handles all 4 modes LOBL, LOAL-DIR, LOAL-HI, LOAL-LO
*
* Arguments:
* 0: Seeker Target PosASL <ARRAY>
* 1: Guidance Arg Array <ARRAY>
* 2: Attack Profile State <ARRAY>
*
* Return Value:
* Missile Aim PosASL <ARRAY>
*
* Example:
* [[1,2,3], [], []] call ace_hellfire_fnc_attackProfile
*
* Public: No
*/
// #define DEBUG_MODE_FULL
#include "script_component.hpp"
params ["_seekerTargetPos", "_args", "_attackProfileStateParams"];
_args params ["_firedEH", "_launchParams"];
_launchParams params ["","_targetLaunchParams"];
_targetLaunchParams params ["", "", "_launchPos"];
_firedEH params ["","","","","","","_projectile"];
// Get state params:
if (_attackProfileStateParams isEqualTo []) then {
_this call FUNC(getAttackProfileSettings);
};
_attackProfileStateParams params ["_attackStage", "_configLaunchHeightClear"];
private _projectilePos = getPosASL _projectile;
private _distanceFromLaunch2d = _launchPos distance2d _projectilePos;
private _heightAboveLaunch = (_projectilePos select 2) - (_launchPos select 2);
// Add height depending on distance for compensate
private _returnTargetPos = nil;
switch (_attackStage) do {
case STAGE_LAUNCH: { // Gain height quickly to pass terrain mask
_returnTargetPos = _projectilePos getPos [100, getDir _projectile];
_returnTargetPos set [2, (_projectilePos select 2) + 36.4]; // 100 and 36.4 gives a 20 deg angle
if (_heightAboveLaunch > _configLaunchHeightClear) then {
_attackProfileStateParams set [0, STAGE_SEEK_CRUISE];
TRACE_2("New Stage: STAGE_SEEK_CRUISE",_distanceFromLaunch2d,_heightAboveLaunch);
};
};
case STAGE_SEEK_CRUISE: { // Slowly gain altitude while searching for target
// Before 4000 cruise at 5.7 degrees up, then level out
private _cruiseHeight = linearConversion [3000, 5000, _distanceFromLaunch2d, 10, 0, true];
_returnTargetPos = _projectilePos getPos [100, getDir _projectile];
_returnTargetPos set [2, (_projectilePos select 2) + _cruiseHeight];
if (!(_seekerTargetPos isEqualTo [0,0,0])) then {
_attackProfileStateParams set [0, STAGE_ATTACK_CRUISE];
TRACE_1("New Stage: STAGE_ATTACK_CRUISE",_distanceFromLaunch2d);
};
};
case STAGE_ATTACK_CRUISE: {
private _currentHeightOverTarget = (_projectilePos select 2) - (_seekerTargetPos select 2);
private _distanceToTarget2d = _seekerTargetPos distance2d _projectilePos;
private _distToGoRatio = _distanceToTarget2d / (_launchPos distance2d _seekerTargetPos);
// arcing up at 7 degrees to start until 50% left, then smooth curve to a downward attack
private _gainSlope = linearConversion [0.5, 0.1, _distToGoRatio, 7, -7, true];
_returnTargetPos = +_seekerTargetPos;
_returnTargetPos set [2, ((_projectilePos select 2) + (_distanceToTarget2d * sin _gainSlope)) max (_seekerTargetPos select 2)];
if ((_distanceToTarget2d < 500) || {(_currentHeightOverTarget atan2 _distanceToTarget2d) > 15}) then { // Wait until we can come down at a sharp angle
_attackProfileStateParams set [0, STAGE_ATTACK_TERMINAL];
TRACE_2("New Stage: STAGE_ATTACK_TERMINAL",_distanceToTarget2d,_currentHeightOverTarget);
};
};
case STAGE_ATTACK_TERMINAL: {
private _distanceToTarget2d = _seekerTargetPos distance2d _projectilePos;
_returnTargetPos = _seekerTargetPos vectorAdd [0, 0, _distanceToTarget2d * 0.02];
};
};
// TRACE_1("Adjusted target position", _returnTargetPos);
_returnTargetPos;