Vector.hh

/**********************************************************************
 * blaRAY -- photon mapper/raytracer
 * (C) 2008 by Tomasz bla Fortuna <bla@thera.be>, <bla@af.gliwice.pl>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * any later version.
 *
 * See Docs/LICENSE
 *********************/

#ifndef _VECTOR_H_
#define _VECTOR_H_

#include <stdexcept>
#include <string>
#include "General/Debug.hh"
#include "General/Types.hh"
#include "Math/Matrix.hh"
#include "Math/Tuple.hh"

namespace Math {

        class Vector : public Tuple<Double, false, 3> {
        public:
                enum {X, Y, Z};
                inline Vector(Double x, Double y, Double z) {
                        D[0] = x;
                        D[1] = y;
                        D[2] = z;
                }

                inline Vector() {
                        D[0] = D[1] = D[2] = 0.0;
                }

                inline Vector(const Tuple<Double, false, 3> &T) {
                        D[0] = T[0]; /* Can it be more optimal? Rather no... */
                        D[1] = T[1];
                        D[2] = T[2];
                }

                friend std::ostream &operator<<(std::ostream &os, const Vector &V);

                inline void Set(Double x, Double y, Double z)
                {
                        this->D[0] = x;
                        this->D[1] = y;
                        this->D[2] = z;
                }

                void Transform(const Matrix &M);

                Vector operator*(const Matrix &M) const;
                using Tuple<Double, false, 3>::operator*;

                Vector Cross(const Vector &M) const;

                inline Double Dot(const Vector &M) const {
                        return  D[0] * M.D[0] +
                                D[1] * M.D[1] +
                                D[2] * M.D[2];
                }


        };
};

#endif

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