weather.c

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//-----------------------------------------------------------------------------
enum EWeatherPhenomenon
{
    OVERCAST,
    FOG,
    RAIN,
    SNOWFALL,
    WIND_DIRECTION,
    WIND_MAGNITUDE,
    VOLFOG_HEIGHT_DENSITY,
    VOLFOG_DISTANCE_DENSITY,
    VOLFOG_HEIGHT_BIAS  
};
 
 
//-----------------------------------------------------------------------------
class WeatherPhenomenon
{
    private void WeatherPhenomenon() {}
    private void ~WeatherPhenomenon() {}
    
    proto native EWeatherPhenomenon GetType();

    proto native float GetActual();

    proto native float GetForecast();

    proto native void Set( float forecast, float time = 0, float minDuration = 0 );

    proto native float GetNextChange();
    proto native void SetNextChange( float time );

    proto void GetLimits( out float fnMin, out float fnMax );
    proto native void SetLimits( float fnMin, float fnMax );

    proto void GetForecastChangeLimits( out float fcMin, out float fcMax );
    proto native void SetForecastChangeLimits( float fcMin, float fcMax );

    proto void GetForecastTimeLimits( out float ftMin, out float ftMax );
    proto native void SetForecastTimeLimits( float ftMin, float ftMax );

 
    bool OnBeforeChange( float change, float time )
    {
        // check if mission forces use of custom weather
        Weather weather = g_Game.GetWeather();
                
        if ( weather.GetMissionWeather() )
            return false;
        
        if (weather.GetWeatherUpdateFrozen())
            return true;
        
        // check for active worlddata with custom onbeforechange behaviour
        Mission currentMission = g_Game.GetMission();
 
        if ( currentMission )
        {
            WorldData worldData = currentMission.GetWorldData();
            if ( worldData )
            {
                return worldData.WeatherOnBeforeChange( GetType(), GetActual(), change, time );
            }
        }
 
        return false;
    }
};
 
 
typedef WeatherPhenomenon Overcast;
typedef WeatherPhenomenon Fog;
typedef WeatherPhenomenon Rain;
typedef WeatherPhenomenon Snowfall;
typedef WeatherPhenomenon WindDirection;
typedef WeatherPhenomenon WindMagnitude;
 
 
 
 
//-----------------------------------------------------------------------------
class Weather
{
    protected bool m_missionWeather;
    protected bool m_UpdateFrozen;
    
    private void Weather()
    {
        m_missionWeather = false;
    }
    
    private void ~Weather() {}
    
    proto native float GetTime();

    proto native Overcast GetOvercast();

    proto native Fog GetFog();

    proto native Rain GetRain();
    
    proto native Snowfall GetSnowfall();
    
    proto native WindDirection GetWindDirection();
    
    proto native WindMagnitude GetWindMagnitude();

    proto native void SetStorm( float density, float threshold, float timeOut );
    
    proto native void SuppressLightningSimulation(bool state);

    proto native vector GetWind();
    
    proto native void SetWind( vector wind );
    
    proto native float GetWindSpeed();
    
    proto native void SetWindSpeed( float speed );
    
    proto native float GetWindMaximumSpeed();
    
    proto native void SetWindMaximumSpeed( float maxSpeed );
    
    proto void GetWindFunctionParams( out float fnMin, out float fnMax, out float fnSpeed );
    
    proto native void SetWindFunctionParams( float fnMin, float fnMax, float fnSpeed );

    proto native void SetRainThresholds( float tMin, float tMax, float tTime );
    
    proto native void SetSnowfallThresholds( float tMin, float tMax, float tTime ); 
    
    proto native void SetSnowflakeScale(float scale);
    
    proto native float GetSnowflakeScale();
    
    static proto float WindDirectionToAngle( vector dir );
    
    static proto vector AngleToWindDirection( float angle );
    
    
    proto native bool IsDynVolFogEnabled();
    proto native void SetDynVolFogDistanceDensity(float value, float time = 0);
    proto native float GetDynVolFogDistanceDensity();
    proto native void SetDynVolFogHeightDensity(float value, float time = 0);
    proto native float GetDynVolFogHeightDensity();
    proto native void SetDynVolFogHeightBias(float value, float time = 0);
    proto native float GetDynVolFogHeightBias();
    
    
    void MissionWeather( bool use )
    {
        m_missionWeather = use;
    }
    
    bool GetMissionWeather()
    {
        return m_missionWeather;
    }
    
    void SetWeatherUpdateFreeze(bool state)
    {
        m_UpdateFrozen = state;
    }
    
    bool GetWeatherUpdateFrozen()
    {
        return m_UpdateFrozen;
    }
    
    // Noise reduction due to environmental conditions, used for AI noise evaluation
    float GetNoiseReductionByWeather()
    {
        float rainReduction = GetRain().GetActual() * GameConstants.RAIN_NOISE_REDUCTION_WEIGHT;
        float snowfallReduction = GetSnowfall().GetActual() * GameConstants.SNOWFALL_NOISE_REDUCTION_WEIGHT;
        
        if (rainReduction == 0 && snowfallReduction == 0)
            return 1;
        
        if (rainReduction > snowfallReduction)  // combined phenomenons dont need to have multiplicative effects
            return 1 - rainReduction;
        else
            return 1 - snowfallReduction;
    }
};