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#ifndef BALL_H
#define BALL_H
#include "SDL.h"
#include "SDL_opengl.h"
GLuint ball_texture;
typedef struct Ball_t {
struct Ball_t * next; /* next ball; 4 or 8 bytes */
GLfloat x, y; /* x, y coordinates; 4 bytes ea. */
GLfloat xv, yv; /* x and y velocity components; 4 bytes ea. */
GLubyte r, g, b, a; /* red, green, blue, alpha components; 1 byte ea. */
} Ball_t;
void GLPong_BallInit(void);
void GLPong_BallDeinit(void);
void GLPong_BallAdd(Ball_t ** balls);
void GLPong_BallDelete(Ball_t * from, Ball_t * ball);
void GLPong_BallDeleteAll(Ball_t * list);
int GLPong_BallCollide(const Ball_t * a, const Ball_t * b);
void GLPong_BallMoveAll(Ball_t ** balls);
void GLPong_BallDrawAll(Ball_t * balls);
#ifdef DEBUG
int length(Ball_t * balls);
#endif
#endif
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