mirror of
https://github.com/acemod/ACE3.git
synced 2024-08-30 18:23:18 +00:00
1e404cf85b
Co-authored-by: Dystopian <sddex@ya.ru> Co-authored-by: PabstMirror <pabstmirror@gmail.com> Co-authored-by: Grim <69561145+LinkIsGrim@users.noreply.github.com>
71 lines
2.7 KiB
Plaintext
71 lines
2.7 KiB
Plaintext
#include "..\script_component.hpp"
|
|
/*
|
|
* Author: LorenLuke
|
|
* Returns an approximate representation of temperature at a unit's location.
|
|
*
|
|
* Arguments:
|
|
* 0: Unit <OBJECT>
|
|
*
|
|
* Return Value:
|
|
* None
|
|
*
|
|
* Example:
|
|
* [ACE_player] call ace_weather_fnc_getApproximateAirTemp
|
|
*
|
|
* Public: No
|
|
*/
|
|
|
|
params ["_unit"];
|
|
TRACE_1("params",_unit);
|
|
|
|
if (isNil {_unit getVariable "ACE_airTemperatureBias"}) then {
|
|
_unit setVariable ["ACE_airTemperatureBias", [-(random(3) + 1), random(3) + 1]];
|
|
};
|
|
|
|
private _temperature = ((getPosASL _unit) select 2) call EFUNC(weather,calculateTemperatureAtHeight);
|
|
private _humidity = EGVAR(weather,currentHumidity);
|
|
private _heatIndex = [_temperature, _humidity] call EFUNC(weather,calculateHeatIndex);
|
|
private _chill = [_temperature, _humidity] call EFUNC(weather,calculateWindChill);
|
|
|
|
private _e = 2^(1/(ln 2));
|
|
|
|
/*
|
|
// Windchill calc with wind vars; https://en.wikipedia.org/wiki/Wind_chill#Australian_Apparent_Temperature
|
|
private _windspeed = [getPosASL _unit, true, true, true] call EFUNC(weather,calculateWindSpeed);
|
|
private _water_vapor_pressure = _humidity * 6.105 *(_e ^ ((17.27 * _temperature)/(237.7 + _temperature))) / 100;
|
|
private _chill = _temperature + (0.33 * _water_vapor_pressure) - (0.70 * _windspeed) - 400;
|
|
*/
|
|
|
|
// sigmoid = f(x) = L / (1 + e^(-k * (x - x_0)));
|
|
// L max value, e = euler, k = steepness,
|
|
|
|
// L = max value
|
|
private _sigmoid_L = 1;
|
|
|
|
// x_0 = sigmoid midpoint, aka 50% proportion; 18.5C, ~65F
|
|
private _sigmoid_midpoint = 18.5;
|
|
|
|
// place +- midpoint with desired proportion
|
|
private _sigmoid_valuation = 8.5;
|
|
|
|
// desired upper and proportion on sigmoid
|
|
private _sigmoid_proportion_at_valuation = 0.95;
|
|
private _sigmoid_proportion_at_lower_valuation = 1 - _sigmoid_proportion_at_valuation;
|
|
|
|
// k = steepness
|
|
private _sigmoid_k = (ln ((_sigmoid_proportion_at_lower_valuation^-1) - 1) ) / _sigmoid_valuation;
|
|
|
|
// 5$/95% @ 10C/27C; [5% and 95% values at 50F and ~80F];
|
|
// 5% = 0.05 = 1/20 = f(_midpoint - _valuation) = L / (1 + e^(-k * ((_midpoint - _valuation) - _midpoint)
|
|
// (0.05)^-1 = 20 = (L / (1 + e^(-k * (-_valuation))) )^-1 = (1 + e^(-k * -_valuation))/L;
|
|
// L = 1;> 20 = (1 + e^(k * valuation)); 20 - 1 = e^(k * valuation);
|
|
// 19 = e^(k * 8.5); (log_e 19) = (k * 8.5); (log_e 19)/8.5 = k;
|
|
|
|
// retrieve sigmoid proportion at _temperature
|
|
private _temperature_sigmoid = _sigmoid_L / (1 + _e^(-_sigmoid_k * (_temperature - _sigmoid_midpoint)));
|
|
|
|
// Weighted average between windchill and heat index based on sigmoid levels, plus +- 4deg randomisation
|
|
private _apparent_temperature = ((_temperature_sigmoid * _heatIndex) + ((1 - _temperature_sigmoid) * _chill) + random(8) - 4);
|
|
|
|
[_apparent_temperature, (_unit getVariable "ACE_airTemperatureBias")] call FUNC(displayAirTemp);
|