#ifndef __VECTOR_H__
#define __VECTOR_H__






//---- VECTOR FUNCTIONS

double vector_length( double x, double y, double z );

void vector_normalise(double *x, double *y, double *z);

void vector_normalise( double *x, double *y, double *z, double length );

void vector_cross
(
  double *x, double *y, double *z,
  double ax, double ay, double az,
  double bx, double by, double bz
);


void vector_rotate_x( double *x, double *y, double *z, double angle );
void vector_rotate_y( double *x, double *y, double *z, double angle );
void vector_rotate_z( double *x, double *y, double *z, double angle );





#endif