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#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_rot_t *get_group_rotation(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);
#endif
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