ACE3/addons/frag/functions/fnc_doSpall.sqf
2024-07-18 21:10:20 -05:00

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#include "..\script_component.hpp"
/*
* Author: Jaynus, NouberNou, Lambda.Tiger,
* This function check whether a spall event has occured and generates spall.
*
* Arguments:
* 0: The object a projectile hit <OBJECT>
* 1: The config name of the projectile <STRING>
* 2: The projectile that should cause spalling <OBJECT>
* 3: The position the projectile hit the object <ARRAY>
* 4: The old velocity of the projectile <ARRAY>
*
* Return Value:
* None
*
* Example:
* [[1000, 45, 60], 0.8, getPosASL ace_player] call ace_frag_fnc_doSpall
*
* Public: No
*/
params ["_objectHit", "_roundType", "_round", "_oldPos", "_oldVelocity"];
TRACE_1("",_objectHit);
if ((isNil "_objectHit") || {isNull _objectHit}) exitWith {
WARNING_1("Problem with hitPart data - bad object [%1]",_objectHit);
};
private _caliber = getNumber (configFile >> "CfgAmmo" >> _roundType >> "caliber");
private _explosive = getNumber (configFile >> "CfgAmmo" >> _roundType >> "explosive");
private _idh = getNumber (configFile >> "CfgAmmo" >> _roundType >> "indirectHitRange");
_roundType call FUNC(getSpallInfo) params ["_caliber", "_explosive"];
private _exit = false;
private _vm = 1;
private _curVelocity = velocity _round;
private _oldSpeed = vectorMagnitude _oldVelocity;
private _curSpeed = vectorMagnitude _curVelocity;
if (alive _round) then {
private _diff = _oldVelocity vectorDiff _curVelocity;
private _polar = _diff call CBA_fnc_vect2polar;
if (abs (_polar select 1) > 45 || {abs (_polar select 2) > 45}) then {
if (_caliber < 2.5) then {
_exit = true;
} else {
SUB(_vm,_curSpeed / _oldSpeed);
};
};
};
if (_exit) exitWith {};
private _unitDir = vectorNormalized _oldVelocity;
private _spallPos = [];
if ((isNil "_oldPos") || {!(_oldPos isEqualTypeArray [0,0,0])}) exitWith {WARNING_1("Problem with hitPart data - bad pos [%1]",_oldPos);};
for "_i" from 0 to 100 do {
private _pos1 = _oldPos vectorAdd (_unitDir vectorMultiply (0.01 * _i));
private _pos2 = _oldPos vectorAdd (_unitDir vectorMultiply (0.01 * (_i + 1)));
if (!lineIntersects [_pos1, _pos2]) exitWith {
_spallPos = _pos2;
};
};
if (_spallPos isEqualTo []) exitWith {};
private _spallPolar = _oldVelocity call CBA_fnc_vect2polar;
if (_explosive > 0) then {
_shellType call FUNC(getFragInfo) params ["", "_fragVelocity"];
_spallPolar set [0, _fragVelocity * 0.66];
};
private _spread = 15 + (random 25);
private _spallCount = 5 + (random 10);
TRACE_1("",_spallCount);
for "_i" from 1 to _spallCount do {
private _elev = ((_spallVelocity select 2) - _spread) + (random (_spread * 2));
private _dir = ((_spallVelocity select 1) - _spread) + (random (_spread * 2));
if (abs _elev > 90) then {
ADD(_dir,180);
};
_dir = _dir % 360;
private _vel = (_spallVelocity select 0) * 0.33 * _vm;
_vel = (_vel - (_vel * 0.25)) + (random (_vel * 0.5));
private _spallFragVect = [_vel, _dir, _elev] call CBA_fnc_polar2vect;
private _fragment = (selectRandomWeighted WEIGHTED_SIZE) createVehicle [0, 0, 10000];
_fragment setPosASL _spallPos;
_fragment setVelocity _spallFragVect;
#ifdef DEBUG_MODE_DRAW
[_fragment, "orange", true] call FUNC(dev_trackObj);
#endif
};
_spread = 5 + (random 5);
_spallCount = 3 + (random 5);
for "_i" from 1 to _spallCount do {
private _elev = ((_spallVelocity select 2) - _spread) + (random (_spread * 2));
private _dir = ((_spallVelocity select 1) - _spread) + (random (_spread * 2));
if (abs _elev > 90) then {
ADD(_dir,180);
};
_dir = _dir % 360;
private _vel = (_spallVelocity select 0) * 0.55 * _vm;
_vel = (_vel - (_vel * 0.25)) + (random (_vel * 0.5));
private _spallFragVect = [_vel, _dir, _elev] call CBA_fnc_polar2vect;
private _fragment = (selectRandomWeighted WEIGHTED_SIZE) createVehicle [0, 0, 10000];
_fragment setPosASL _spallPos;
_fragment setVelocity _spallFragVect;
#ifdef DEBUG_MODE_DRAW
[_fragment, "orange", true] call FUNC(dev_trackObj);
#endif
};