vec3d.h

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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *\
 *                                                                           *
 *                       / /   / /    __    \ \  / /                         *
 *                      / /__ / /   / _ \    \ \/ /                          *
 *                     /  ___  /   | |/_/    / /\ \                          *
 *                    / /   / /    \_\      / /  \ \                         *
 *                                                                           *
 *                         Jakub Benda (c) 2014                              *
 *                     Charles University in Prague                          *
 *                                                                           *
\* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

#ifndef HEX_VEC3D
#define HEX_VEC3D

#include <iostream>

struct vec3d
{
    double x;
    double y;
    double z;
};

std::ostream & operator << (std::ostream & os, vec3d const & v);

std::istream & operator >> (std::istream & is, vec3d & v);

double dot (vec3d const & u, vec3d const & v);

vec3d cross (vec3d const & u, vec3d const & v);

vec3d operator - (vec3d const & u, vec3d const & v);

vec3d operator * (vec3d const & u, double a);

double norm (vec3d const & v);

vec3d normalize (vec3d const & v);

#endif