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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. */
/******************************************************************/
#include <cmath>
#include "brdfSample.h"
//////////////////
// Constructors //
//////////////////
brdfSample::brdfSample(void)
{
_out = vec3d(0.0f, 0.0f, 1.0f);
_pdf = 0.0f;
_reflectance = color(0.0f);
}
brdfSample::brdfSample(const vec3d& out, const float pdf, const color& reflectance)
{
_out = out;
_pdf = std::max(pdf, 0.0f);
_reflectance = reflectance;
}
brdfSample::brdfSample(const brdfSample& bs)
{
_out = bs._out;
_pdf = bs._pdf;
_reflectance = bs._reflectance;
}
///////////////
// Operators //
///////////////
brdfSample& brdfSample::operator=(const brdfSample& bs)
{
_assign(bs);
return *this;
}
brdfSample brdfSample::operator*(float pdf) const
{
return brdfSample(_out, _pdf * pdf, _reflectance);
}
brdfSample& brdfSample::operator*=(float pdf)
{
_pdf *= pdf;
return *this;
}
////////////////
// Inspectors //
////////////////
const vec3d& brdfSample::exitantDirection(void) const
{
return _out;
}
float brdfSample::pdf(void) const
{
return _pdf;
}
const color& brdfSample::reflectance(void) const
{
return _reflectance;
}
/////////////
// Methods //
/////////////
brdfSample& brdfSample::transform(const transformation3d& t)
{
_out = t.transformDirection(_out);
return *this;
}
brdfSample& brdfSample::inverseTransform(const transformation3d& t)
{
_out = t.inverseTransformDirection(_out);
return *this;
}
/////////////////////
// Private Methods //
/////////////////////
void brdfSample::_swap(brdfSample& bs)
{
swap(_out, bs._out);
std::swap(_pdf, bs._pdf);
swap(_reflectance, bs._reflectance);
}
void brdfSample::_assign(const brdfSample& bs)
{
_out = bs._out;
_pdf = bs._pdf;
_reflectance = bs._reflectance;
}
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