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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 _BRDFSAMPLE_H_
#define _BRDFSAMPLE_H_
#include "vec3d.h"
#include "color.h"
#include "transformation3d.h"
#include <ostream>
class brdfSample {
public:
//////////////////
// Constructors //
//////////////////
brdfSample(void);
brdfSample(const vec3d& out, const float pdf, const color& reflectance);
brdfSample(const brdfSample& bs);
///////////////
// Operators //
///////////////
brdfSample& operator=(const brdfSample& bs);
brdfSample operator*(float pdf) const;
brdfSample& operator*=(float pdf);
////////////////
// Inspectors //
////////////////
const vec3d& exitantDirection(void) const;
float pdf(void) const;
const color& reflectance(void) const;
/////////////
// Methods //
/////////////
brdfSample& transform(const transformation3d& t);
brdfSample& inverseTransform(const transformation3d& t);
/////////////
// Friends //
/////////////
friend void swap(brdfSample& a, brdfSample& b) { a._swap(b); }
friend brdfSample transform(const brdfSample& s, const transformation3d& t) { brdfSample result(s); return result.transform(t); }
friend brdfSample inverseTransform(const brdfSample& s, const transformation3d& t) { brdfSample result(s); return result.inverseTransform(t); }
friend std::ostream& operator<<(std::ostream& s, const brdfSample& bs)
{
s << "BrdfSample: -> " << bs._out << " with PDF: " << bs._pdf << ", and reflectance: " << bs._reflectance;
return s;
}
private:
/////////////////////
// Private Methods //
/////////////////////
void _swap(brdfSample& bs);
void _assign(const brdfSample& bs);
//////////////////////////
// Private Data Members //
//////////////////////////
vec3d _out;
float _pdf;
color _reflectance;
};
#endif /* _BRDFSAMPLE_H_ */
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