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#ifndef __PERCORSO_H__
#define __PERCORSO_H__

#define PATH_ELEM_ARC      1
#define PATH_ELEM_LINE     2

#define CLOCKWISE         -1
#define COUNTERCLOCK       1

typedef struct point {
  double x,y;
} POINT;

typedef struct path_elem {
  int type;
  void *data;
  struct path_elem *next;
} PATH_ELEM;

typedef struct pd_arc {
  POINT c;
  double r;
  double alpha1;
  double alpha2;
  int dir;
} PATH_DATA_ARC;

typedef struct pd_line {
  POINT p1;
  POINT p2;
  double alpha;
  int dir;
} PATH_DATA_LINE;


PATH_ELEM *find_closest_elem(POINT *p, double radius);
double get_distance_from_elem(POINT *p, PATH_ELEM *e);
double get_angle_from_elem(POINT *p, PATH_ELEM *e);
/* ritorna:
   1  : curva a sinistra
   -1 : curva a destra  
   0  : dritto
*/
int is_curve(PATH_ELEM *e);

void Init_All_Path();

#endif