#ifndef _PLANET_H
#define _PLANET_H

#include <SDL.h>

#include "vector.h"
#include "list.h"
#include "utils.h"

struct planet {
	struct vector speed;
	struct vector pos;
	struct list_head list;
	double mass;
	float size;
	unsigned char r, g, b;
};

#define list_to_planet(planet) container_of((planet), struct planet, list)

void init_planet(const SDL_Surface *screen, struct planet *p);
void draw_planet(SDL_Surface *screen, struct planet *p);
void gravitize_planets(struct planet *a, struct planet *b, const double time);
void move_planet(struct planet *p, const double time);
void print_planet(const struct planet *p);

#endif