include/backdrop.h

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#ifndef _BACKDROP_H

#include <stdio.h>                      // Header File For Standard Input/Output
#include <GL/gl.h>
#include <GL/glu.h>
#include <SDL/SDL.h>
#ifdef __APPLE__
#include <SDL_image/SDL_image.h>
#else
#include <SDL/SDL_image.h>
#endif
#include <string>
#include <iostream>
#include <fstream>
#include <cmath>
#include <cassert>

#include "quat.h"
#include "camera.h"
#include "weather.h"
#include "textures.h"
#include "settings.h"

#include "globals.h"

//this should be the same as the #define in terrain.h
//#define EARTH_RADIUS 50000.0
#define EARTH_RADIUS 637800.0

class BACKDROP
{
private:
        TEXTURE_HANDLE sun_texture, sun_texture_ref, sky_texture, rain_texture,
                                        cloud_texture, moon_texture, stars_texture;
        SDL_Surface * sky_tex_img;
        ofstream error_log;
        bool volumetricfog;
        float fogdensity;
        float daytime_cache;
        float windx,windz;
        int cloudthresh;

        void DrawDrop(VERTEX pos, float rndperm, float yscale, float zheight);
        bool initdone;

        string TEXTURE_PATH;

public:
        BACKDROP();
        ~BACKDROP();
        void Init();
        void Draw(VERTEX tersize);
        void DrawSky(double daytime, float transparency);
        void DrawSkyGradient(double daytime, float transparency, GLdouble *temp_matrix);
        void DrawSun(double daytime, float transparency, GLdouble *temp_matrix);
        void DrawMoon(double daytime, float transparency, GLdouble *temp_matrix);
        void DrawClouds(double daytime, float transparency, GLdouble *temp_matrix);
        void DrawStars(double daytime, float transparency, GLdouble *temp_matrix);
        void SetFogStrength(float density);
        void RefreshFog();
        void GetHorizonColor(float * color3);
        void GetSkyColor(float * color3);
        void SetCloudCover(int newcloudthresh);
        void SetWindoffset(float windoffset_x, float windoffset_z);
        void DrawRain(float day_time);

        float sunpos_lng;
        float sunpos_lat;

        float moonpos_lng;
        float moonpos_lat;
        
        void DeInit();
};

#define _BACKDROP_H
#endif

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