ACE3/addons/medical_vitals/functions/fnc_updateHeartRate.sqf
BrettMayson 1649422cbd
Medical Vitals - Add SPO2 (#9360)
Co-authored-by: johnb432 <58661205+johnb432@users.noreply.github.com>
Co-authored-by: Grim <69561145+LinkIsGrim@users.noreply.github.com>
Co-authored-by: LinkIsGrim <salluci.lovi@gmail.com>
2024-02-07 17:50:18 -03:00

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#include "..\script_component.hpp"
/*
* Author: Glowbal
* Update the heart rate
*
* Arguments:
* 0: The Unit <OBJECT>
* 1: Heart Rate Adjustments <NUMBER>
* 2: Time since last update <NUMBER>
* 3: Sync value? <BOOL>
*
* ReturnValue:
* Current Heart Rate <NUMBER>
*
* Example:
* [player, 0, 1, false] call ace_medical_vitals_fnc_updateHeartRate
*
* Public: No
*/
params ["_unit", "_hrTargetAdjustment", "_deltaT", "_syncValue"];
private _heartRate = GET_HEART_RATE(_unit);
if IN_CRDC_ARRST(_unit) then {
if (alive (_unit getVariable [QEGVAR(medical,CPR_provider), objNull])) then {
if (_heartRate == 0) then { _syncValue = true }; // always sync on large change
_heartRate = random [25, 30, 35];
} else {
if (_heartRate != 0) then { _syncValue = true }; // always sync on large change
_heartRate = 0
};
} else {
private _hrChange = 0;
private _targetHR = 0;
private _bloodVolume = GET_BLOOD_VOLUME(_unit);
if (_bloodVolume > BLOOD_VOLUME_CLASS_4_HEMORRHAGE) then {
GET_BLOOD_PRESSURE(_unit) params ["_bloodPressureL", "_bloodPressureH"];
private _meanBP = (2/3) * _bloodPressureH + (1/3) * _bloodPressureL;
private _spo2 = GET_SPO2(_unit);
private _painLevel = GET_PAIN_PERCEIVED(_unit);
private _targetBP = 107;
if (_bloodVolume < BLOOD_VOLUME_CLASS_2_HEMORRHAGE) then {
_targetBP = _targetBP * (_bloodVolume / DEFAULT_BLOOD_VOLUME);
};
_targetHR = DEFAULT_HEART_RATE;
if (_bloodVolume < BLOOD_VOLUME_CLASS_3_HEMORRHAGE) then {
_targetHR = _heartRate * (_targetBP / (45 max _meanBP));
};
if (_painLevel > 0.2) then {
_targetHR = _targetHR max (80 + 50 * _painLevel);
};
// Increase HR to compensate for low blood oxygen
// Increase HR to compensate for higher oxygen demand (e.g. running, recovering from sprint)
private _oxygenDemand = _unit getVariable [VAR_OXYGEN_DEMAND, 0];
_targetHR = _targetHR + ((97 - _spo2) * 2) + (_oxygenDemand * -1000);
_targetHR = (_targetHR + _hrTargetAdjustment) max 0;
_hrChange = round(_targetHR - _heartRate) / 2;
} else {
_hrChange = -round(_heartRate / 10);
};
if (_hrChange < 0) then {
_heartRate = (_heartRate + _deltaT * _hrChange) max _targetHR;
} else {
_heartRate = (_heartRate + _deltaT * _hrChange) min _targetHR;
};
};
_unit setVariable [VAR_HEART_RATE, _heartRate, _syncValue];
_heartRate