#ifndef RAYTRACER_CAMERA_HPP
#define RAYTRACER_CAMERA_HPP

#include "./vec3.hpp"

namespace raytracer
{
class camera
{
 public:
  camera(const vec3& pos, const vec3& upVect, const vec3& lookAt);
  virtual ~camera(){}
    
  inline vec3 const & pos() { return pos_; }
  inline vec3 const & dir() { return dir_; }
  inline vec3 const & right() { return right_; }
  inline vec3 const & down() { return down_; }
  inline vec3 const & up_vect() { return up_vect_; }

  inline void look_at(const vec3& lookat) { recalc(&pos_, &lookat); }
  inline void pos(const vec3& pos) { recalc(&pos, NULL); }
  inline void up_vect(const vec3& upVect) { this->up_vect_= upVect; recalc(&pos_, NULL); }
 private:
  void recalc(const vec3* pos, const vec3* lookAt);
  vec3 right_, down_, pos_, dir_, up_vect_;
};

}
#endif