ACE3/addons/weather/functions/fnc_calculateHeatIndex.sqf
2016-01-05 01:39:29 -06:00

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/*
* Author: Ruthberg
* Calculates heat index based on temperature and relative humidity
*
* Arguments:
* 0: temperature - degrees celsius <NUMBER>
* 1: relativeHumidity - value between 0.0 and 1.0 <NUMBER>
*
* Return Value:
* heat index <NUMBER>
*
* Example:
* [36, 0.75] call ace_weather_fnc_calculateHeatIndex
*
* Public: No
*/
#include "script_component.hpp"
#define __C1 0.363445176
#define __C2 0.988622465
#define __C3 4.777114035
#define __C4 -0.114037667
#define __C5 -0.000850208
#define __C6 -0.020716198
#define __C7 0.000687678
#define __C8 0.000274954
params ["_t", "_rh"];
// Source: https://en.wikipedia.org/wiki/Heat_index
_t = TO_FAHRENHEIT(_t);
_rh = _rh * 100; // relative humidity in %
TO_CELSIUS(__C1 + __C2 * _t + __C3 * _rh + __C4 * _t * _rh + __C5 * _t^2 + __C6 * _rh^2 + __C7 * _t^2 * _rh + __C8 * _t * _rh^2)