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/******************************************************************/
/* 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 _LIGHTSOURCESHADER_H_
#define _LIGHTSOURCESHADER_H_

#include <memory>
#include "shader_base.h"
#include "lightsource_base.h"

class lightsourceShader : public shader_base {
 public:
  //////////////////
  // Constructors //
  //////////////////
  lightsourceShader(const std::shared_ptr<const lightsource_base>& lightsource, const std::shared_ptr<const shader_base>& reflectanceShader=nullptr);
  lightsourceShader(const lightsourceShader&) = delete;

  ///////////////
  // Operators //
  ///////////////
  lightsourceShader& operator=(const lightsourceShader&) = delete;

  /////////////
  // Methods //
  /////////////
  virtual color shade(const intersectionPoint& ip, const vec3d& light_dir) const final override;

  virtual color reflectance(const intersectionPoint& ip, const vec3d& light_dir) const final override;
  virtual brdfSample sample(const intersectionPoint& ip, float r1, float r2) const final override;
  virtual float reflectivity(const intersectionPoint& ip) const final override;
  virtual color emittance(const intersectionPoint& ip) const final override;

  virtual shaderProperties properties(const intersectionPoint& ip) const final override;

 protected:
  ///////////////////////
  // Protected Methods //
  ///////////////////////
  virtual void _print(std::ostream& s) const final override;

  //////////////////
  // Data Members //
  //////////////////
  std::shared_ptr<const shader_base> _reflectanceShader;
  std::shared_ptr<const lightsource_base> _lightsource;
};

#endif /* _LIGHTSOURCESHADER_H_ */