#ifndef WH_2DMATH_H_1b5b2228_
#define WH_2DMATH_H_1b5b2228_

typedef struct fpoint FPOINT;
typedef struct ipoint IPOINT;

struct fpoint {
  double x;
  double y;
  } ;

struct ipoint {
  int x;
  int y;
  } ;

extern FPOINT add2(FPOINT, FPOINT);
extern FPOINT sub2(FPOINT, FPOINT);
extern FPOINT scale2(FPOINT, double);
extern double dot2(FPOINT, FPOINT);
extern FPOINT unit2(FPOINT);
extern double len2(FPOINT);
extern double len22(FPOINT);
extern double cross2(FPOINT, FPOINT);
extern FPOINT sincos2(double);
extern FPOINT r90(FPOINT);
extern FPOINT i2f(IPOINT);
extern IPOINT rf2i(FPOINT);

#endif