hittable.h

#ifndef HITTABLE_H
#define HITTABLE_H

#include "rtweekend.h"

class material;

struct hit_record {
  point3 p;
  vec3 normal;
  shared_ptr<material> mat_ptr;
  double t;
  bool front_face;

  inline void set_face_normal(const ray& r, const vec3& outward_normal) {
    front_face = dot(r.direction(), outward_normal) < 0;
    normal = front_face ? outward_normal : -outward_normal;
  }
};

class hittable {
 public:
  virtual ~hittable() {}
  virtual bool hit(const ray& r, double t_min, double t_max,
                   hit_record& rec) const = 0;
};

#endif