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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 _LIGHTSAMPLE_H_
#define _LIGHTSAMPLE_H_
#include "vec3d.h"
#include "color.h"
#include "constants.h"
class lightSample {
public:
//////////////////
// Constructors //
//////////////////
lightSample(const vec3d& direction=vec3d(0.0f, 0.0f, 0.0f),
const color& emittance=color(0.0f, 0.0f, 0.0f),
float distance=+LARGE,
float pdf=1.0f,
float foreshortening=1.0f);
lightSample(const lightSample& ls);
///////////////
// Operators //
///////////////
lightSample& operator=(const lightSample& ls);
const color& operator()(void) const;
////////////////
// Inspectors //
////////////////
const vec3d& directionToPoint(void) const;
vec3d directionToLight(void) const;
const color& emittance(void) const;
float distance(void) const;
float pdf(void) const;
float foreshortening(void) const;
/////////////
// Friends //
/////////////
friend void swap(lightSample& a, lightSample& b) { a._swap(b); }
friend std::ostream& operator<<(std::ostream& s, const lightSample& ls)
{
s << "LightSample: direction=" << ls.directionToPoint() << ", emittance=" << ls() << ", distance=" << ls.distance() << ", pdf=" << ls.pdf() << ", foreshortening=" << ls.foreshortening();
return s;
}
private:
/////////////////////
// Private Methods //
/////////////////////
void _assign(const lightSample& ls);
void _swap(lightSample& ls);
//////////////////
// Data Members //
//////////////////
vec3d _direction;
color _emittance;
float _distance;
float _pdf;
float _foreshortening;
};
#endif /* _LIGHTSAMPLE_H_ */
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