#ifndef WH_3D_H_93058c7d_
#define WH_3D_H_93058c7d_

typedef struct pt3 PT3;

struct pt3 {
  double x;
  double y;
  double z;
  } ;

#define MAKEPT3(xv,yv,zv) ((PT3){.x=(xv),.y=(yv),.z=(zv)})

extern PT3 smul3(double, PT3);
extern double norm3(PT3);
extern double norm23(PT3);
extern double dot3(PT3, PT3);
extern PT3 cross(PT3, PT3);
extern PT3 sub3(PT3, PT3);
extern PT3 add3(PT3, PT3);
extern PT3 unit3(PT3);
extern PT3 interp3(PT3, double, PT3);
extern PT3 rotate3(PT3, PT3, double);

#endif