ACE3/addons/weather/functions/fnc_updateAceWeather.sqf

/*
 * Author: ACE2 Team, esteldunedain, ruthberg
 * Updates the wind and rain evolution on the server. Broadcasts the current and next values to the clients
 *
 * Arguments:
 * None
 *
 * Return Value:
 * None
 *
 * Example:
 * [] call ace_weather_fnc_updateAceWeather
 *
 * Public: No
 */
#include "script_component.hpp"

private _overcastMultiplier = 1 max (2* overcast) min 2; // 0 (@ overcast 0), 2 (@ overcast 1)

// Rain simulation
if (GVAR(syncRain) && {GVAR(rain_period_count) > GVAR(rain_next_period)}) then {

    GVAR(rain_next_period) = ceil((1 + (random 10)) / _overcastMultiplier);
    GVAR(rain_period_count) = 0;

    private _lastRain = GVAR(current_rain);
    private _rainOverCast = 0;

    if (overcast >= 0.7) then {
        _rainOverCast = (overcast - 0.7) / 0.3;
        if (GVAR(current_rain) == 0) then {
            // Initialize rain with a random strength depending on the current overcast value
            GVAR(current_rain) = -0.25 + (random 0.75) + (random 0.5) * _rainOverCast;
        };

        GVAR(current_rain) = GVAR(current_rain) + GVAR(current_rain) * ((_rainOverCast * _overcastMultiplier) / 8) * GVAR(rain_current_range);
        GVAR(current_rain) = 0 max GVAR(current_rain) min 1;

        GVAR(rain_current_range) = -1 + (random 2);
    } else {
        _rainOverCast = 1;

        GVAR(current_rain) = 0;
    };

    private _transitionTime = 1 + (_rainOverCast * 5) + (random (_rainOverCast * 20));

    ACE_RAIN_PARAMS = [_lastRain, GVAR(current_rain), _transitionTime];
    TRACE_4("",_lastRain,_rainOverCast,_transitionTime,overcast);

    GVAR(rain_period_start_time) = CBA_missionTime;
    publicVariable "ACE_RAIN_PARAMS";
};

// Wind simulation
if (GVAR(syncWind) && {GVAR(wind_period_count) > GVAR(wind_next_period)}) then {

    GVAR(wind_next_period) = ceil((2 + (random 5)) / _overcastMultiplier);
    GVAR(wind_period_count) = 0;

    private _windDirectionVariance = (90 - (random 180)) * (overcast ^ 2);
    private _windDirection = (360 + GVAR(wind_direction_reference) + _windDirectionVariance) % 360;
    private _windDirectionChange = _windDirection - GVAR(current_wind_direction);
    if (_windDirectionChange > 180) then {
        _windDirectionChange = _windDirectionChange - 360;
    };
    if (_windDirectionChange < -180) then {
        _windDirectionChange = 360 + _windDirectionChange;
    };

    private _windMaxDiff = GVAR(mean_wind_speed) - GVAR(max_wind_speed);
    private _windMinDiff = GVAR(min_wind_speed) - GVAR(mean_wind_speed);

    private _ratioMax = (random 1) ^ 2;
    private _ratioMin = (random 1) ^ 2;

    private _windSpeed = GVAR(current_wind_speed);
    private _windSpeedChange = 0;
    if ((random 1) < (0.3 max overcast)) then {
        _windSpeed = GVAR(mean_wind_speed) + _windMaxDiff * _ratioMax + _windMinDiff * _ratioMin;
        _windSpeedChange = _windSpeed - GVAR(current_wind_speed);
    };

    private _transitionTime = GVAR(wind_next_period) * GVAR(serverUpdateInterval);

    TRACE_5("dirCur/dirNew/spdCur/spdNew/period",GVAR(current_wind_direction),_windDirection,GVAR(current_wind_speed),_windSpeed,_transitionTime);

    ACE_WIND_PARAMS = [GVAR(current_wind_direction),
    _windDirectionChange,
    GVAR(current_wind_speed),
    _windSpeedChange,
    _transitionTime];

    GVAR(current_wind_direction) = _windDirection;
    GVAR(current_wind_speed) = _windSpeed;

    GVAR(wind_period_start_time) = CBA_missionTime;
    publicVariable "ACE_WIND_PARAMS";
};


if (GVAR(syncMisc)) then {
    ACE_MISC_PARAMS = [lightnings, rainbow, fogParams, GVAR(temperatureShift), GVAR(badWeatherShift), GVAR(humidityShift)];
    publicVariable "ACE_MISC_PARAMS";
};

GVAR(rain_period_count) = GVAR(rain_period_count) + 1;
GVAR(wind_period_count) = GVAR(wind_period_count) + 1;