mitsuba::MediumSamplingRecord Struct Reference

Data record for sampling a point on the in-scattering integral of the RTE. More...

#include <mitsuba/render/medium.h>

Public Member Functions
	MediumSamplingRecord ()
const PhaseFunction *	getPhaseFunction () const
	Return a pointer to the phase function. More...
std::string	toString () const
	Return a string representation. More...

Public Attributes
Float	t
	Traveled distance. More...
Point	p
	Location of the scattering interaction. More...
Float	time
	Time value associated with the medium scattering event. More...
Vector	orientation
	Local particle orientation at p. More...
Spectrum	transmittance
	Specifies the transmittance along the segment [mint, t]. More...
Spectrum	sigmaA
	The medium's absorption coefficient at p. More...
Spectrum	sigmaS
	The medium's scattering coefficient at p. More...
Float	pdfSuccess
	Records the probability density of sampling a medium interaction at p. More...
Float	pdfSuccessRev
	Records the probability density of sampling a medium interaction in the reverse direction. More...
Float	pdfFailure
const Medium *	medium
	Pointer to the associated medium. More...

Detailed Description

Data record for sampling a point on the in-scattering integral of the RTE.

See Also

Medium::sampleDistance()

Constructor & Destructor Documentation

mitsuba::MediumSamplingRecord::MediumSamplingRecord ( )

inline

Member Function Documentation

const PhaseFunction * MediumSamplingRecord::getPhaseFunction ( ) const

inline

Return a pointer to the phase function.

std::string mitsuba::MediumSamplingRecord::toString

(

)

const

Return a string representation.

Member Data Documentation

const Medium* mitsuba::MediumSamplingRecord::medium

Pointer to the associated medium.

Vector mitsuba::MediumSamplingRecord::orientation

Local particle orientation at p.

Point mitsuba::MediumSamplingRecord::p

Location of the scattering interaction.

Float mitsuba::MediumSamplingRecord::pdfFailure

When the Medium::sampleDistance() is successful, this function returns the probability of not having generated a medium interaction until t. Otherwise, it records the probability of not generating any interactions in the whole interval [mint, maxt]. This probability is assumed to be symmetric with respect to sampling from the other direction, which is why there is no pdfFailureRev field.

Float mitsuba::MediumSamplingRecord::pdfSuccess

Records the probability density of sampling a medium interaction at p.

Float mitsuba::MediumSamplingRecord::pdfSuccessRev

Records the probability density of sampling a medium interaction in the reverse direction.

This is essentially the density of obtained by calling sampleDistance, but starting at p and stopping at ray.o. These probabilities are important for bidirectional methods.

Spectrum mitsuba::MediumSamplingRecord::sigmaA

The medium's absorption coefficient at p.

Spectrum mitsuba::MediumSamplingRecord::sigmaS

The medium's scattering coefficient at p.

Float mitsuba::MediumSamplingRecord::t

Traveled distance.

Float mitsuba::MediumSamplingRecord::time

Time value associated with the medium scattering event.

Spectrum mitsuba::MediumSamplingRecord::transmittance

Specifies the transmittance along the segment [mint, t].

When sampling a distance fails, this contains the transmittance along the whole ray segment [mint, maxDist].

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The documentation for this struct was generated from the following files:

• include/mitsuba/render/medium.h
• include/mitsuba/render/records.inl