r_weather.h

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/*
Copyright (C) 2013 Alexander Y. Tishin
Copyright (C) 2013-2020 UFO: Alien Invasion.
 
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
 
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 
See the GNU General Public License for more details.
 
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 
*/
 
#pragma once
 
class Weather {
    public:
        /* public members are intended; they are to avoid need of getters/setters to change weather in-flight */
        enum weatherTypes {WEATHER_CLEAN, WEATHER_RAIN, WEATHER_SNOW, WEATHER_SANDSTORM, WEATHER_MAX};
        weatherTypes weatherType;
        float weatherStrength; 
        float windStrength; 
        float windDirection; 
        float windTurbulence; 
        float fallingSpeed; 
 
        int splashTime; 
        float splashSize; 
 
        Weather(void);
        Weather(weatherTypes weather);
        virtual ~Weather();
 
        void setDefaults(void);
        void changeTo(weatherTypes weather);
        void clearParticles(void);
 
        void update(int milliseconds);
        void render(void);
    protected:
        static const size_t MAX_PARTICLES = 8192; 
        float smearLength; 
        float particleSize; 
 
        vec4_t color;
 
        struct particle {
            GLfloat x, y, z; 
            GLfloat vx, vy, vz; 
            int timeout; 
            int ttl; 
        };
 
        particle particles[MAX_PARTICLES];
};