BSDF Class Reference

Superclass of all bidirectional scattering distribution functions. More...

#include <bsdf.h>

Inheritance diagram for BSDF:

Collaboration diagram for BSDF:

Public Member Functions
virtual Color3f	sample (BSDFQueryRecord &bRec, const Point2f &sample) const =0
	Sample the BSDF and return the importance weight (i.e. the value of the BSDF * cos(theta_o) divided by the probability density of the sample with respect to solid angles). More...
virtual Color3f	eval (const BSDFQueryRecord &bRec) const =0
	Evaluate the BSDF for a pair of directions and measure specified in code bRec. More...
virtual float	pdf (const BSDFQueryRecord &bRec) const =0
	Compute the probability of sampling bRec.wo (conditioned on bRec.wi). More...
virtual EClassType	getClassType () const override
	Return the type of object (i.e. Mesh/BSDF/etc.) provided by this instance.
virtual bool	isDiffuse () const
	Return whether or not this BRDF is diffuse. This is primarily used by photon mapping to decide whether or not to store photons on a surface.
Public Member Functions inherited from NoriObject
virtual	~NoriObject ()
	Virtual destructor.
virtual void	addChild (NoriObject *child)
	Add a child object to the current instance. More...
virtual void	setParent (NoriObject *parent)
	Set the parent object. More...
virtual void	activate ()
	Perform some action associated with the object. More...
virtual std::string	toString () const =0
	Return a brief string summary of the instance (for debugging purposes)
void	setIdName (const std::string &name)
	Allow to assign a name to the object.
const std::string &	getIdName () const

Additional Inherited Members
Public Types inherited from NoriObject
enum	EClassType {   EScene = 0 , EMesh , ETexture , EBSDF ,   EPhaseFunction , EEmitter , EMedium , ECamera ,   EIntegrator , ESampler , ETest , EReconstructionFilter ,   EClassTypeCount }
Static Public Member Functions inherited from NoriObject
static std::string	classTypeName (EClassType type)
	Turn a class type into a human-readable string.
Protected Attributes inherited from NoriObject
std::string	m_idname

Detailed Description

Superclass of all bidirectional scattering distribution functions.

Definition at line 63 of file bsdf.h.

Member Function Documentation

eval()

virtual Color3f BSDF::eval ( const BSDFQueryRecord &  bRec ) const

pure virtual

Evaluate the BSDF for a pair of directions and measure specified in code bRec.

Parameters

bRec	A record with detailed information on the BSDF query

Returns

The BSDF value, evaluated for each color channel

Implemented in Microfacet, Diffuse, Mirror, and Dielectric.

pdf()

virtual float BSDF::pdf ( const BSDFQueryRecord &  bRec ) const

pure virtual

Compute the probability of sampling bRec.wo (conditioned on bRec.wi).

This method provides access to the probability density that is realized by the sample() method.

Parameters

bRec	A record with detailed information on the BSDF query

Returns

A probability/density value expressed with respect to the specified measure

Implemented in Microfacet, Diffuse, Mirror, and Dielectric.

sample()

virtual Color3f BSDF::sample ( BSDFQueryRecord &  bRec, const Point2f &  sample  ) const

pure virtual

Sample the BSDF and return the importance weight (i.e. the value of the BSDF * cos(theta_o) divided by the probability density of the sample with respect to solid angles).

Parameters

bRec	A BSDF query record
sample	A uniformly distributed sample on

Returns

The BSDF value divided by the probability density of the sample sample. The returned value also includes the cosine foreshortening factor associated with the outgoing direction, when this is appropriate. A zero value means that sampling failed.

Implemented in Diffuse, Dielectric, Microfacet, and Mirror.

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

• bsdf.h