Ray.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 _RAY_H_
#define _RAY_H_

#include <iostream>

#include "Math/Matrix.hh"
#include "Math/Transform.hh"
#include "Math/Vector.hh"

#include "World/Color.hh"

namespace Render {
        class Ray {
        private:
                Math::Vector S;

                Math::Vector D;

                /*              World::Color C; */

        public:
                Ray(const Math::Vector &S, const Math::Vector &D) : S(S), D(D)
                {
                }

                static Ray RayFromPoints(const Math::Vector &Start,
                                         const Math::Vector &Destination);

                Ray Reflect(const Math::Vector &Normal,
                            const Math::Vector &Point) const;

                Ray Refract(const Math::Vector &Normal,
                            const Math::Vector &Point,
                            Double FromN, Double IntoN) const;

                inline const Math::Vector &Start() const
                {
                        return S;
                }

                inline const Math::Vector &Direction() const
                {
                        return D;
                }

                Math::Vector GetPoint(Double Loc) const
                {
                        return this->S + (this->D * Loc);
                }

                friend std::ostream &operator<<(std::ostream &os, const Ray &R);
        };

};

#endif

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