Implementation of 'Importance Sampling Spherical Harmonics' by W. Jarsz, N. Carr and H. W. Jensen (EUROGRAPHICS 2009) More...

#include <mitsuba/core/shvector.h>

Inheritance diagram for mitsuba::SHSampler:

Public Member Functions
	SHSampler (int bands, int depth)
	Precompute a spherical harmonics sampler object. More...

Float	warp (const SHVector &f, Point2 &sample) const
	Warp a uniform sample in [0,1]^2 to one that is approximately proportional to the specified function. More...

std::string	toString () const
	Return information on the size of the precomputed tables. More...

virtual const Class *	getClass () const
	Retrieve this object's class. More...

Public Member Functions inherited from Object
	Object ()
	Construct a new object. More...

int	getRefCount () const
	Return the current reference count. More...

void	incRef () const
	Increase the reference count of the object by one. More...

void	decRef (bool autoDeallocate=true) const
	Decrease the reference count of the object and possibly deallocate it. More...

Static Public Attributes
static Class *	m_theClass

Static Public Attributes inherited from Object
static Class *	m_theClass
	Pointer to the object's class descriptor. More...

Protected Member Functions
virtual	~SHSampler ()
	Virtual destructor. More...

int	I (int l, int m) const

int	P (int m) const

Float	lookupIntegral (int depth, int zBlock, int phiBlock, int l, int m) const

Float *	legendreIntegrals (Float a, Float b)
	Recursively compute assoc. legendre & phi integrals. More...

Float *	phiIntegrals (Float a, Float b)

Float	integrate (int depth, int zBlock, int phiBlock, const SHVector &f) const
	Integrate a SH expansion over the specified mip-map region. More...

Protected Member Functions inherited from Object
virtual	~Object ()
	Virtual private deconstructor. (Will only be called by ref) More...

Protected Attributes
int	m_bands

int	m_depth

Float ***	m_phiMap

Float ***	m_legendreMap

int	m_dataSize

Float *	m_normalization

Additional Inherited Members
Static Public Member Functions inherited from Object
static void	staticInitialization ()
	Initializes the built-in reference count debugger (if enabled) More...

static void	staticShutdown ()
	Free the memory taken by staticInitialization() More...

Detailed Description

Implementation of 'Importance Sampling Spherical Harmonics' by W. Jarsz, N. Carr and H. W. Jensen (EUROGRAPHICS 2009)

Constructor & Destructor Documentation

mitsuba::SHSampler::SHSampler	(	int	bands,
		int	depth
	)

Precompute a spherical harmonics sampler object.

Parameters

bands	Number of SH coefficient bands to support
depth	Number of recursive sample warping steps.

virtual mitsuba::SHSampler::~SHSampler ( )

protectedvirtual

Virtual destructor.

Member Function Documentation

virtual const Class* mitsuba::SHSampler::getClass ( ) const

virtual

Retrieve this object's class.

Reimplemented from Object.

int mitsuba::SHSampler::I	(	int	l,
		int	m
	)		const

inlineprotected

Float mitsuba::SHSampler::integrate	(	int	depth,
		int	zBlock,
		int	phiBlock,
		const SHVector &	f
	)		const

protected

Integrate a SH expansion over the specified mip-map region.

Float* mitsuba::SHSampler::legendreIntegrals	(	Float	a,
		Float	b
	)

protected

Recursively compute assoc. legendre & phi integrals.

Float mitsuba::SHSampler::lookupIntegral	(	int	depth,
		int	zBlock,
		int	phiBlock,
		int	l,
		int	m
	)		const

inlineprotected

int mitsuba::SHSampler::P ( int m ) const

inlineprotected

Float* mitsuba::SHSampler::phiIntegrals	(	Float	a,
		Float	b
	)

protected

std::string mitsuba::SHSampler::toString ( ) const

virtual

Return information on the size of the precomputed tables.

Reimplemented from Object.

Float mitsuba::SHSampler::warp	(	const SHVector &	f,
		Point2 &	sample
	)		const

Warp a uniform sample in [0,1]^2 to one that is approximately proportional to the specified function.

The resulting sample will have spherical coordinates [0,pi]x[0,2pi] and its actual PDF (which might be slightly different from the function evaluated at the sample, even if $f$ is a distribution) will be returned.

Member Data Documentation

int mitsuba::SHSampler::m_bands

protected

int mitsuba::SHSampler::m_dataSize

protected

int mitsuba::SHSampler::m_depth

protected

Float*** mitsuba::SHSampler::m_legendreMap

protected

Float* mitsuba::SHSampler::m_normalization

protected

Float*** mitsuba::SHSampler::m_phiMap

protected

Class* mitsuba::SHSampler::m_theClass

static

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

include/mitsuba/core/shvector.h

Public Member Functions

Static Public Attributes

Protected Member Functions

Protected Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation