#ifndef _HACKVR_MATH_H_
#define _HACKVR_MATH_H_

#include "common.h" //should define c3_t

#include <math.h>

#ifndef M_PI
#define M_PI 3.14159265358979323846
#endif

real distance2(c2_t p1,c2_t p2);
c2_t rotate_c2(c2_t p1,c2_t p2,radians dr);
c3_t rotate_c3_xr(c3_t p1,c3_t p2,radians xr);
c3_t rotate_c3_yr(c3_t p1,c3_t p2,radians yr);
c3_t rotate_c3_zr(c3_t p1,c3_t p2,radians zr);
c3_group_rel_t *get_group_relative(char *id);
radians d2r(degrees d);
degrees r2d(radians r);
radians points_to_angle(c2_t p1,c2_t p2);
int between_angles(degrees d,real lower,real upper);
c3_s_t apply_group_relative(c3_s_t s,c3_group_rel_t *group_rel);
c3_t c3_add(c3_t p1,c3_t p2);
c2_t c2_add(c2_t p1,c2_t p2);
real distance3(c3_t p1,c3_t p2);
void print_point(c3_t p);

int isLeft(c2_t, c2_t, c2_t);
int cn_PnPoly(c2_t, c2_t *, int);
int wn_PnPoly(c2_t, c2_t *, int);
int epoch_PnPoly(c2_t, c2_t *,int);

typedef struct {
  int h;
  int w;
  real d[16];//fuck it. I don't want large matrices anyway. could max it at 9 if I really wanted.
} matrix;

void m_print(matrix m);
matrix m_multiply(matrix a,matrix b);

#endif