#ifndef VECTOR3_H_INCLUDED
#define VECTOR3_H_INCLUDED

#include <math.h>

class Vector3
{
public:
    Vector3( double xpos = 0.0, double ypos = 0.0, double zpos = 0.0 )
        : x( xpos ), y( ypos ), z( zpos ) {}
    ~Vector3( void ) {}

    static Vector3 origin;

    Vector3 cross( const Vector3 &right ) const
    {
        return Vector3( ( y * right.z ) - ( z * right.y ),
                        ( z * right.x ) - ( x * right.z ),
                        ( x * right.y ) - ( y * right.x ) );
    }

    Vector3 subtract( const Vector3 &right ) const
    {
        return Vector3( x - right.x, y - right.y, z - right.z );
    }

    Vector3 add( const Vector3 &right ) const
    {
        return Vector3( x + right.x, y + right.y, z + right.z );
    }

    Vector3 scalarMult( double s ) const
    {
        return Vector3( x * s, y * s, z * s );
    }

    double length( void ) const
    {
        return sqrt( ( x * x ) + ( y * y ) + ( z * z ) );
    }

    Vector3 normalize( void ) const
    {
        double l = length();
        return Vector3( x / l, y / l, z / l );
    }

    double dotProduct( const Vector3 &right ) const
    {
        return ( x * right.x ) + ( y * right.y ) + ( z * right.z );
    }

    double x;
    double y;
    double z;
};

#endif // VECTOR3_H_INCLUDED