hittable_list.h

#ifndef HITTABLELISTH
#define HITTABLELISTH
//==================================================================================================
// Written in 2016 by Peter Shirley <ptrshrl@gmail.com>
//
// To the extent possible under law, the author(s) have dedicated all copyright and related and
// neighboring rights to this software to the public domain worldwide. This software is distributed
// without any warranty.
//
// You should have received a copy (see file COPYING.txt) of the CC0 Public Domain Dedication along
// with this software. If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
//==================================================================================================

#include "hittable.h"


class hittable_list: public hittable  {
    public:
        hittable_list() {}
        hittable_list(hittable **l, int n) { list = l; list_size = n; }
        virtual bool hit(const ray& r, float tmin, float tmax, hit_record& rec) const;
        hittable **list;
        int list_size;
};

bool hittable_list::hit(const ray& r, float t_min, float t_max, hit_record& rec) const {
    hit_record temp_rec;
    bool hit_anything = false;
    double closest_so_far = t_max;
    for (int i = 0; i < list_size; i++) {
        if (list[i]->hit(r, t_min, closest_so_far, temp_rec)) {
            hit_anything = true;
            closest_so_far = temp_rec.t;
            rec = temp_rec;
        }
    }
    return hit_anything;
}


#endif