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#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <GL/glut.h>
#define NUMSTARS 3141 /* 3141 for full star catalog, decrease number for better
performance, first N brighter stars are used */
#define NUMBODIES 22
#ifndef PI
#define PI 3.14159265358979323846
#endif
#define DATEOFELEMENTS 2450680.5 /* In Julian days */
#define RADIUSSCALE(x) ((x)*0.001)
#define DEG2RAD(x) ((x)*PI/180.0)
#define RAD2DEG(x) ((x)*180.0/PI)
#define DISTCORRECTION(x) ((x)*1.490)
#define DISTANCE(x,y,z) sqrt(x*x+y*y+z*z)
extern GLfloat LightPos[4];
extern GLfloat ambient[4];
extern GLfloat White[4];
extern GLfloat Black[4];
extern GLuint texName[NUMBODIES],texture,smodel,lighting,drawstars;
extern GLuint Stars,red,polaris;
extern int ImgWidth, ImgHeight;
extern GLenum ImgFormat;
extern GLfloat stars[NUMSTARS][4];
extern double days,timefactor;
extern char texturepath[100];
extern int SLICES,STACKS;
#define SUN 0
#define MERCURY 1
#define VENUS 2
#define EARTH 3
#define MARS 4
#define JUPITER 5
#define SATURN 6
#define URANUS 7
#define NEPTUNE 8
#define PLUTO 9
#define MOON 10
#define IO 11
#define EUROPA 12
#define GANYMEDE 13
#define CALLISTO 14
#define TETHYS 15
#define DIONE 16
#define RHEA 17
#define TITAN 18
#define TRITON 19
#define CHARON 20
#define RINGS 21
typedef struct {
char Name[20];
GLUquadricObj *Object;
GLuint Sphere;
GLubyte *Image;
int Sat;
float DeltaRotation,Radius,Rotation,Degrees;
float Inclination,AscendingNode,Perihelion,MeanDistance,DailyMotion;
float Eccentricity,MeanLongitude;
double posx,posy,posz;
} planetdata;
extern planetdata planets[NUMBODIES];
void Init(void);
void UpdatePositions(void);
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