/******************************************************************/
/* 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 _BVH_INTERSECTOR_H_
#define _BVH_INTERSECTOR_H_

#include <memory>

#include "boundedPrimitive.h"
#include "intersector_base.h"
#include "intersector_factory_base.h"

class bvh_intersector : public intersector_base {
 public:
  //////////////////
  // Constructors //
  //////////////////
  bvh_intersector(void);
  bvh_intersector(const std::vector<std::shared_ptr<const boundedPrimitive>>& compounds);
  bvh_intersector(const bvh_intersector&) = delete;

  ///////////////
  // Operators //
  ///////////////
  bvh_intersector& operator=(const bvh_intersector&) = delete;
  
  /////////////
  // Methods //
  /////////////
  virtual intersectionPoint intersect(const ray& r) const final override;
  
 private:
  //////////////////
  // Data Members //
  //////////////////
  std::shared_ptr<const boundedPrimitive> _root;
};


class bvh_intersector_factory : public intersector_factory_base {
 public:
  /////////////////
  // Constructor //
  /////////////////
  bvh_intersector_factory(void) {}

  ///////////////
  // Operators //
  ///////////////
  std::unique_ptr<const intersector_base> operator()(const boundedCompound& boundedCompound) const final override
  { 
    return std::unique_ptr<const intersector_base>(new bvh_intersector(boundedCompound.compounds())); 
  }
};

#endif /* _BVH_INTERSECTOR_H_ */