/******************************************************************/
/* 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.                                                  */
/******************************************************************/

#include <algorithm>
#include "compoundShader.h"

//////////////////
// Constructors //
//////////////////
compoundShader::compoundShader(const std::vector<std::shared_ptr<const shader_base>>& shader_list)
  : shader_base()
{
  _compound = shader_list;
}


/////////////
// Methods //
/////////////
color compoundShader::shade(const intersectionPoint& ip, const vec3d& light_dir) const
{
  color result(0.0f, 0.0f, 0.0f);
  for_each(_compound.begin(), _compound.end(), [&](const std::shared_ptr<const shader_base>& shader)
  {
    result += shader->shade(ip, light_dir);
  });

  // Done.
  return result;
}


shaderProperties compoundShader::properties(const intersectionPoint& ip) const
{
  // if any component has a property set, then set it for the compound
  shaderProperties result(false, false);
  for(unsigned int i=0; i < _compound.size(); i++)
    result |= _compound[i]->properties(ip);

  // Done.
  return result;
}


void compoundShader::_print(std::ostream& s) const
{
  s << "Compound Shader (" << _compound.size() << " components): {";
  for(unsigned int i=0; i < _compound.size(); i++)
  {
    s << *_compound[i];
    if(i != _compound.size()-1) s << ", ";
  }
  s << "}";
}