#ifndef _UTILS_H_
#define _UTILS_H_

#include <GL/glut.h>
#include <math.h>

#include "structs.h"

inline void cross(Vector& dest, Point& a, Point& b) {
    dest.i = ( (a.y*b.z) - (a.z*b.y) ); //i
    dest.j = ( (a.z*b.x) - (a.x*b.z) ); //j
    dest.k = ( (a.x*b.y) - (a.y*b.x) ); //k
}

inline void cross(Point& dest, Point& a, Point& b) {
    dest.x = ( (a.y*b.z) - (a.z*b.y) ); //i
    dest.y = ( (a.z*b.x) - (a.x*b.z) ); //j
    dest.z = ( (a.x*b.y) - (a.y*b.x) ); //k
}


inline GLfloat dot(Vector &a, Vector &b) {
    return (a.i*b.i)+(a.j*b.j)+(a.k*b.k);
}

inline GLfloat dot(Point &a, Point &b) {
    return (a.x*b.x)+(a.y*b.y)+(a.z*b.z);
}

#endif