/******************************************************************/
/* This file is part of the homework assignments for CSCI-427/527 */
/* at The College of William & Mary and authored by Pieter Peers. */
/* No part of this file, whether altered or in original form, can */
/* be distributed or used outside the context of CSCI-427/527     */
/* without consent of either the College of William & Mary or     */
/* Pieter Peers.                                                  */
/******************************************************************/
#ifndef _BOUNDINGBOX_H_
#define _BOUNDINGBOX_H_

#include <ostream>

#include "ray.h"
#include "vec3d.h"
#include "transformation3d.h"

class boundingBox {
 public:
  /////////////////
  // Constructor //
  /////////////////
  boundingBox(void);
  boundingBox(const vec3d& lfb, const vec3d& rbt);
  boundingBox(const boundingBox& bb);

  //////////////
  // Operator //
  //////////////
  boundingBox& operator=(const boundingBox& src);
  
  boundingBox& operator+=(const boundingBox& bb);
  boundingBox& operator+=(const vec3d& point);

  boundingBox operator+(const boundingBox& bb) const;

  /////////////
  // Methods //
  /////////////
  bool isHit(const ray& r) const;

  vec3d center(void) const;
  vec3d corner(bool left, bool front, bool bottom) const;

  //////////////
  // Mutators //
  //////////////
  boundingBox& transform(const transformation3d& t);
  boundingBox& inverseTransform(const transformation3d& t);

  /////////////
  // Friends //
  /////////////
  friend void swap(boundingBox& a, boundingBox& b) { a._swap(b); }
  friend boundingBox transform(const boundingBox& bb, const transformation3d& t) { return boundingBox(bb).transform(t); }
  friend boundingBox inverseTransform(const boundingBox& bb, const transformation3d& t) { return boundingBox(bb).inverseTransform(t); }
  friend std::ostream& operator<<(std::ostream& s, const boundingBox& bb)
  {
    s << bb._lfb << " - " << bb._rbt;
    return s;
  }

 private:
  /////////////////////
  // Private Methods //
  /////////////////////
  void _swap(boundingBox& bb);
  void _assign(const boundingBox& bb); 

  //////////////////
  // Data Members //
  //////////////////
  vec3d _lfb, _rbt;
};


#endif /* _BOUNDINGBOX_H_ */