merl_data< CONF, NAME > Class Template Reference

MERL-MIT sampled reflectance. More...

#include <merl.h>

Public Member Functions
	BBM_IMPORT_CONFIG (CONF)
	merl_data (void)=delete
	Empty Constructor.
	merl_data (const merl_data &src)=default
	Copy constructor.
merl_data &	operator= (const merl_data &src)=default
	Assignment operator.
	BBM_CONSTRUCTOR (merl_data, args, arg< const std::string &, "filename">)
	Import Constructor.
Spectrum	eval (const Vec3d &in, const Vec3d &out, BsdfFlag component=bsdf_flag::All, unit_t=unit_t::Radiance, Mask mask=true) const
	Evaluate the BSDF given an in and out direction.
BsdfSample	sample (const Vec3d &out, const Vec2d &xi, BsdfFlag component=bsdf_flag::All, unit_t unit=unit_t::Radiance, Mask mask=true) const
	Sample the sanpled BSDF given a direction and two random variables.
Value	pdf (const Vec3d &in, const Vec3d &out, BsdfFlag component=bsdf_flag::All, unit_t unit=unit_t::Radiance, Mask mask=true) const
	Compute the pdf given an in and out direction.
Spectrum	reflectance (const Vec3d &, BsdfFlag component=bsdf_flag::All, unit_t=unit_t::Radiance, Mask mask=true) const
	Return the (approximate) hemispherical reflectance of the BSDF.
std::string	toString (void) const
	Custom string conversion.

Static Public Attributes
static constexpr string_literal	name = NAME

Private Member Functions
void	import (void)
	Import MERL data from file.

Private Attributes
std::string	_filename
	Class members.
merl_linearizer< Config >	_linearizer
std::vector< color< double > >	_data

Detailed Description

template<typename CONF, string_literal NAME = "MerlData">
requires concepts::config<CONF>
class bbm::merl_data< CONF, NAME >

MERL-MIT sampled reflectance.

Stored and provides access to the MERL-MIT measured BRDFs.

Sample, pdf, and reflectance are implemented by placeholders.

Constructor & Destructor Documentation

merl_data() [1/2]

merl_data ( void  )

delete

Empty Constructor.

merl_data() [2/2]

merl_data ( const merl_data< CONF, NAME > &  src )

default

Copy constructor.

Member Function Documentation

BBM_CONSTRUCTOR()

BBM_CONSTRUCTOR ( merl_data< CONF, NAME >  , args  , arg< const std::string &, "filename">    )

inline

Import Constructor.

Parameters

filename

= name of MERL BRDF file

BBM_IMPORT_CONFIG()

BBM_IMPORT_CONFIG

(

CONF

)

eval()

Spectrum eval ( const Vec3d &  in, const Vec3d &  out, BsdfFlag  component = bsdf_flag::All, unit_t  = unit_t::Radiance, Mask  mask = true  ) const

inline

Evaluate the BSDF given an in and out direction.

Parameters

in	= incoming direction of transport
out	= exitant direction of transport
component	= which reflectance component to eval
unit	= unit of computation
mask	= mask to enable/disable lanes

Returns

the resulting Spectrum of the evaluation.

IMPORTANT: The foreshortning (i.e., cosine) is NOT included.

import()

void import ( void  )

inlineprivate

Import MERL data from file.

Load the MERL-MIT BRDF data from path/filename. Will throw a run-time exception if not found, or if the format is not a MERL-MIT format.

operator=()

merl_data & operator= ( const merl_data< CONF, NAME > &  src )

default

Assignment operator.

pdf()

Value pdf ( const Vec3d &  in, const Vec3d &  out, BsdfFlag  component = bsdf_flag::All, unit_t  unit = unit_t::Radiance, Mask  mask = true  ) const

inline

Compute the pdf given an in and out direction.

Parameters

in	= the incoming direction
out	= the outgoing direction
component	= which reflectance component was sampled
unit	= unit of computation
mask	= enable/disable lanes.

Returns

the PDF that the outgoing direction would be sampled given the incoming direction.

reflectance()

Spectrum reflectance ( const Vec3d &  , BsdfFlag  component = bsdf_flag::All, unit_t  = unit_t::Radiance, Mask  mask = true  ) const

inline

Return the (approximate) hemispherical reflectance of the BSDF.

Parameters

out	= the outgoing direction (ignored)
component	= which reflectance component to eval
unit	= unit of computation
mask	= enable/disable lanes

Returns

the approximate hemispherical reflectance of the BSDF for a given incident direction

sample()

BsdfSample sample ( const Vec3d &  out, const Vec2d &  xi, BsdfFlag  component = bsdf_flag::All, unit_t  unit = unit_t::Radiance, Mask  mask = true  ) const

inline

Sample the sanpled BSDF given a direction and two random variables.

Parameters

out	= outgoing direction
xi	= two random variables stored in a Vec2d
component	= which reflectance component to sample
unit	=unit of computation
mask	= mask to enable/disable lanes

Returns

A bsdfSample containing the sampled direction and the corresponding pdf.

toString()

std::string toString ( void  ) const

inline

Custom string conversion.

Member Data Documentation

_data

std::vector<color<double> > _data

private

_filename

std::string _filename

private

Class members.

_linearizer

merl_linearizer<Config> _linearizer

private

name

constexpr string_literal name = NAME

staticconstexpr

---

The documentation for this class was generated from the following file:

• include/staticmodel/merl.h