/******************************************************************/
/* 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 _ENVIRONMENTMAP_H_
#define _ENVIRONMENTMAP_H_

#include <memory>
#include <ostream>

#include "vec3d.h"
#include "texture_base.h"
#include "transformation3d.h"


class environmentMap {
 public:
  //////////////////
  // Constructors //
  //////////////////
  environmentMap(const std::shared_ptr<const texture_base>& map, const transformation3d& transform=transformation3d());
  environmentMap(const environmentMap& src);

  ///////////////
  // Operators //
  ///////////////
  environmentMap operator=(const environmentMap& src);
  color operator()(const vec3d& direction) const;

  /////////////
  // Friends //
  /////////////
  friend void swap(environmentMap& a, environmentMap& b) { a._swap(b); }

  friend std::ostream& operator<<(std::ostream& s, const environmentMap& em)
  {
    em._print(s);
    return s;
  }

 protected:
  ///////////////////////
  // Protected Methods //
  ///////////////////////
  void _assign(const environmentMap& src);
  void _swap(environmentMap& swp);
  virtual void _print(std::ostream& s) const;

  //////////////////
  // Data Members //
  //////////////////
  transformation3d _transform;
  std::shared_ptr<const texture_base> _map;
};

#endif /* _ENVIRONMENTMAP_H_ */