ray_tracer.hpp

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/*
**    TP 4ETI CPE Lyon
**    Copyright (C) 2011 Damien Rohmer
**
**    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
**    (at your option) any later version.
**
**   This program is distributed in the hope that it will be useful,
**    but WITHOUT ANY WARRANTY; without even the implied warranty of
**    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
**    GNU General Public License for more details.
**
**    You should have received a copy of the GNU General Public License
**    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/


#ifndef _RAY_TRACER_HPP_
#define _RAY_TRACER_HPP_

#include <object3d.hpp>
#include <scene3d.hpp>
#include <vector>


namespace cpe
{

    struct intersection_object;
    class image;
    class color;
    class ray;


    class ray_tracer
    {
    public:

        // ********************************************* //
        // ********************************************* //
        //  RAY-TRACING
        // ********************************************* //
        // ********************************************* //

        static void trace(const scene3d& scene,image* pic);


    private:

        // ********************************************* //
        // ********************************************* //
        //  HELPER METHODS
        // ********************************************* //
        // ********************************************* //

        static color throw_ray(const scene3d& scene,const ray& ray_current);

        static std::pair<intersection_object,bool> find_inter(const ray& ray_current,const scene3d& scene);
        static color find_intersection_color(const std::pair<intersection_object,bool>& inter,const scene3d& scene);


    };



    struct intersection_object
    {
        intersection_object(const intersection_data& inter,const material& mat):inter_data(inter),mat_data(mat){}

        intersection_data inter_data;
        material mat_data;
    };
}

#endif