flying-balls/balls.h

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#ifndef BALLS_H_INCLUDED
#define BALLS_H_INCLUDED
#include <gtk/gtk.h>
struct ball_face;
struct ball {
double x;
double y;
unsigned int radius;
double v_x;
double v_y;
double angle;
double v_angle;
struct ball_face * face;
};
extern struct ball * balls;
extern unsigned int n_balls;
extern unsigned int radius_min;
extern unsigned int radius_max;
extern unsigned int v_max;
extern unsigned int v_min;
extern unsigned int v_angle_min;
extern unsigned int v_angle_max;
extern const char * face_filename;
extern int face_rotation;
extern void balls_init ();
extern void balls_destroy ();
extern void ball_update_state (struct ball * p);
extern void ball_elastic_collision (struct ball * p, struct ball * q);
extern void ball_reposition (struct ball * b);
extern void balls_draw (cairo_t * cr);
#endif