ray.h

Go to the documentation of this file.

/***************************************************************************
 *   Copyright (C) 1998-2009 by authors (see AUTHORS.txt )                 *
 *                                                                         *
 *   This file is part of LuxRender.                                       *
 *                                                                         *
 *   Lux Renderer 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.                                   *
 *                                                                         *
 *   Lux Renderer 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/>. *
 *                                                                         *
 *   This project is based on PBRT ; see http://www.pbrt.org               *
 *   Lux Renderer website : http://www.luxrender.net                       *
 ***************************************************************************/

#ifndef _LUXRAYS_RAY_H
#define _LUXRAYS_RAY_H

#include "luxrays/core/geometry/vector.h"
#include "luxrays/core/geometry/point.h"

namespace luxrays {

extern float RAY_EPSILON;

class  Ray {
public:
        // Ray Public Methods
        Ray() : maxt(std::numeric_limits<float>::infinity()) {
                mint = RAY_EPSILON;
        }

        Ray(const Point &origin, const Vector &direction)
                : o(origin), d(direction), maxt(std::numeric_limits<float>::infinity()) {
                mint = RAY_EPSILON;
        }

        Ray(const Point &origin, const Vector &direction,
                float start, float end = std::numeric_limits<float>::infinity())
                : o(origin), d(direction), mint(start), maxt(end) { }

        Point operator()(float t) const { return o + d * t; }
        void GetDirectionSigns(int signs[3]) const {
                signs[0] = d.x < 0.f;
                signs[1] = d.y < 0.f;
                signs[2] = d.z < 0.f;
        }

        // Ray Public Data
        Point o;
        Vector d;
        mutable float mint, maxt;
};

inline std::ostream &operator<<(std::ostream &os, const Ray &r) {
        os << "Ray[" << r.o << ", " << r.d << ", " << r.mint << "," << r.maxt << "]";
        return os;
}

class RayHit {
public:
        float t;
        float b1, b2; // Barycentric coordinates of the hit point
        unsigned int index;

        void SetMiss() { index = 0xffffffffu; };
        bool Miss() const { return (index == 0xffffffffu); };
};

}

#endif  /* _LUXRAYS_RAY_H */

---