ACE3/addons/medical_damage/functions/fnc_woundsHandlerSQF.sqf

#include "script_component.hpp"
/*
 * Author: Glowbal, commy2
 * Handling of the open wounds & injuries upon the handleDamage eventhandler.
 *
 * Arguments:
 * 0: Unit That Was Hit <OBJECT>
 * 1: Damage done to each body part <ARRAY>
 * 2: Type of the damage done <STRING>
 *
 * Return Value:
 * None
 *
 * Example:
 * [player, [[0.5, "Body", 1]], "bullet"] call ace_medical_damage_fnc_woundsHandlerSQF
 *
 * Public: No
 */

params ["_unit", "_allDamages", "_typeOfDamage"];
TRACE_4("woundsHandlerSQF",_unit,_allDamages,_typeOfDamage);


if !(_typeOfDamage in GVAR(damageTypeDetails)) then {
    WARNING_1("damage type not found",_typeOfDamage);
    _typeOfDamage = "unknown";
};

GVAR(damageTypeDetails) get _typeOfDamage params ["_thresholds", "_selectionSpecific", "", "_damageWoundDetails"];

// Administration for open wounds and ids
private _openWounds = GET_OPEN_WOUNDS(_unit);

private _createdWounds = false;
private _updateDamageEffects = false;
private _painLevel = 0;
private _criticalDamage = false;
private _bodyPartDamage = _unit getVariable [QEGVAR(medical,bodyPartDamage), [0,0,0,0,0,0]];
private _bodyPartVisParams = [_unit, false, false, false, false]; // params array for EFUNC(medical_engine,updateBodyPartVisuals);

// process wounds separately for each body part hit
{   // forEach _allDamages
    _x params ["_damage", "_bodyPart"];

    // silently ignore structural damage
    if (_bodyPart == "#structural") then {continue};

    // Convert the selectionName to a number and ensure it is a valid selection.
    private _bodyPartNToAdd = ALL_BODY_PARTS find toLower _bodyPart;
    if (_bodyPartNToAdd < 0) then {
        ERROR_1("invalid body part %1",_bodyPart);
        continue
    };

    // determine how many wounds to create
    private _nWounds = [_damage, _thresholds, true] call FUNC(interpolatePoints);
    if (_nWounds < 1) then {
        TRACE_2("Damage created zero wounds",_damage,_typeOfDamage);
        continue
    };
    private _dmgPerWound = _damage/_nWounds;

    // find the available injuries for this damage type and damage amount
    private _weightedWoundTypes = [];
    {
        private _weighting = _x select 1;
        private _woundWeight = [_dmgPerWound, _weighting] call FUNC(interpolatePoints);
        _weightedWoundTypes pushBack _x;
        _weightedWoundTypes pushBack _woundWeight;
    } forEach _damageWoundDetails;

    if (_weightedWoundTypes isEqualTo []) then {
        TRACE_2("No valid wounds",_damage,_typeOfDamage);
        continue
    };

    for "_i" from 1 to _nWounds do {

        // Select the injury we are going to add
        selectRandomWeighted _weightedWoundTypes params ["_woundTypeToAdd", "", "_dmgMultiplier", "_bleedMultiplier", "_sizeMultiplier", "_painMultiplier", "_fractureMultiplier"];
        if (isNil "_woundTypeToAdd") then {
            WARNING_4("No valid wound types",_damage,_dmgPerWound,_typeOfDamage,_bodyPart);
            continue
        };
        GVAR(woundDetails) get _woundTypeToAdd params ["","_injuryBleedingRate","_injuryPain","_causeLimping","_causeFracture"];
        private _woundClassIDToAdd = GVAR(woundClassNames) find _woundTypeToAdd;
    
        // Add a bit of random variance to wounds
        private _woundDamage = _dmgPerWound * _dmgMultiplier * random [0.9, 1, 1.1];

        _bodyPartDamage set [_bodyPartNToAdd, (_bodyPartDamage select _bodyPartNToAdd) + _woundDamage];
        _bodyPartVisParams set [[1,2,3,3,4,4] select _bodyPartNToAdd, true]; // Mark the body part index needs updating

        // Anything above this value is guaranteed worst wound possible
        private _worstDamage = 2;

        #define LARGE_WOUND_THRESHOLD 0.5

        // Config specifies bleeding and pain for worst possible wound
        // Worse wound correlates to higher damage, damage is not capped at 1
        private _woundSize = linearConversion [0.1, _worstDamage, _woundDamage * _sizeMultiplier, LARGE_WOUND_THRESHOLD^3, 1, true];
    
        private _pain = _woundSize * _painMultiplier * _injuryPain;
        _painLevel = _painLevel + _pain;

        private _bleeding = _woundSize * _bleedMultiplier * _injuryBleedingRate;

        // large wounds are > LARGE_WOUND_THRESHOLD
        // medium is > LARGE_WOUND_THRESHOLD^2
        // minor is > LARGE_WOUND_THRESHOLD^3
        private _category = 0  max (2 - floor (ln _woundSize / ln LARGE_WOUND_THRESHOLD)) min 2;

        private _classComplex = 10 * _woundClassIDToAdd + _category;

        // Create a new injury. Format [0:classComplex, 1:bodypart, 2:amountOf, 3:bleedingRate, 4:woundDamage]
        private _injury = [_classComplex, _bodyPartNToAdd, 1, _bleeding, _woundDamage];

        if (_bodyPartNToAdd == 0 || {_bodyPartNToAdd == 1 && {_woundDamage > PENETRATION_THRESHOLD}}) then {
            _criticalDamage = true;
        };
        if ([_unit, _bodyPartNToAdd, _bodyPartDamage, _woundDamage] call FUNC(determineIfFatal)) then {
            if (!isPlayer _unit || {random 1 < EGVAR(medical,deathChance)}) then {
                TRACE_1("determineIfFatal returned true",_woundDamage);
                [QEGVAR(medical,FatalInjury), _unit] call CBA_fnc_localEvent;
            };
        };

        #ifdef DEBUG_MODE_FULL
        systemChat format["%1, damage: %2, peneration: %3, bleeding: %4, pain: %5", _bodyPart, _woundDamage toFixed 2, _woundDamage > PENETRATION_THRESHOLD, _bleeding toFixed 3, _pain toFixed 3];
        #endif

        switch (true) do {
            case (
                _causeFracture
                && {EGVAR(medical,fractures) > 0}
                && {_bodyPartNToAdd > 1}
                && {_woundDamage > FRACTURE_DAMAGE_THRESHOLD}
                && {random 1 < (_fractureMultiplier * EGVAR(medical,fractureChance))}
            ): {
                private _fractures = GET_FRACTURES(_unit);
                _fractures set [_bodyPartNToAdd, 1];
                _unit setVariable [VAR_FRACTURES, _fractures, true];

                [QEGVAR(medical,fracture), [_unit, _bodyPartNToAdd]] call CBA_fnc_localEvent;
                TRACE_1("Limb fracture",_bodyPartNToAdd);

                _updateDamageEffects = true;
            };
            case (
                _causeLimping
                && {EGVAR(medical,limping) > 0}
                && {_bodyPartNToAdd > 3}
                && {_woundDamage > LIMPING_DAMAGE_THRESHOLD}
            ): {
                _updateDamageEffects = true;
            };
        };

        // if possible merge into existing wounds
        private _createNewWound = true;
        {
            _x params ["_classID", "_bodyPartN", "_oldAmountOf", "_oldBleeding", "_oldDamage"];
            if (
                    (_classComplex == _classID) &&
                    {_bodyPartNToAdd == _bodyPartN} &&
                    {(_bodyPartNToAdd != 1) || {(_woundDamage < PENETRATION_THRESHOLD) isEqualTo (_oldDamage < PENETRATION_THRESHOLD)}} && // penetrating body damage is handled differently
                    {(_bodyPartNToAdd > 3) || {!_causeLimping} || {(_woundDamage <= LIMPING_DAMAGE_THRESHOLD) isEqualTo (_oldDamage <= LIMPING_DAMAGE_THRESHOLD)}} // ensure limping damage is stacked correctly
                    ) exitWith {
                TRACE_2("merging with existing wound",_injury,_x);
                private _newAmountOf = _oldAmountOf + 1;
                _x set [2, _newAmountOf];
                private _newBleeding = (_oldAmountOf * _oldBleeding + _bleeding) / _newAmountOf;
                _x set [3, _newBleeding];
                private _newDamage = (_oldAmountOf * _oldDamage + _woundDamage) / _newAmountOf;
                _x set [4, _newDamage];
                _createNewWound = false;
            };
        } forEach _openWounds;

        if (_createNewWound) then {
            TRACE_1("adding new wound",_injury);
            _openWounds pushBack _injury;
        };
        _createdWounds = true;
    };

    // selection-specific damage only hits the first part
    if (_selectionSpecific > 0) then {
        break;
    };
} forEach _allDamages;

if (_updateDamageEffects) then {
    [_unit] call EFUNC(medical_engine,updateDamageEffects);
};

if (_createdWounds) then {
    _unit setVariable [VAR_OPEN_WOUNDS, _openWounds, true];
    _unit setVariable [QEGVAR(medical,bodyPartDamage), _bodyPartDamage, true];

    [_unit] call EFUNC(medical_status,updateWoundBloodLoss);

    _bodyPartVisParams call EFUNC(medical_engine,updateBodyPartVisuals);

    [QEGVAR(medical,injured), [_unit, _painLevel]] call CBA_fnc_localEvent;

    if (_criticalDamage || {_painLevel > PAIN_UNCONSCIOUS}) then {
        [_unit] call FUNC(handleIncapacitation);
    };

    TRACE_4("exit",_unit,_painLevel,GET_PAIN(_unit),GET_OPEN_WOUNDS(_unit));
};

[] //return, no further damage handling