BPTFullPath Class Reference

#include <bpt.fullpath.h>

Public Member Functions
LM_PUBLIC_API	BPTFullPath (int s, int t, const BPTSubpath &lightSubpath, const BPTSubpath &eyeSubpath)
LM_PUBLIC_API Math::Vec3	EvaluateUnweightContribution (const Scene &scene, Math::Vec2 &rasterPosition) const
LM_PUBLIC_API Math::Float	EvaluateFullpathPDF (int i) const
LM_PUBLIC_API Math::Float	EvaluateFullpathPDFRatio (int i) const
LM_PUBLIC_API bool	FullpathPDFIsZero (int i) const
LM_PUBLIC_API Math::Float	PathSelectionProbability () const
LM_PUBLIC_API void	DebugPrint () const
LM_PUBLIC_API const BPTPathVertex *	FullPathVertex (int i) const
LM_PUBLIC_API Math::PDFEval	FullPathVertexDirectionPDF (int i, TransportDirection transportDir) const

Public Attributes
int	s
	of vertices in light sub-path
int	t
	of vertices in eye sub-path
const BPTSubpath &	lightSubpath
	Light sub-path.
const BPTSubpath &	eyeSubpath
	Eye sub-path.
Math::PDFEval	pdfDL [2]
	PDF evaluation for y_{s-1} (light sub-path)
Math::PDFEval	pdfDE [2]
	PDF evaluation for z_{t-1} (eye sub-path)

Detailed Description

BPT full-path. Represents a full-path combining light sub-path and eye sub-path.

Constructor & Destructor Documentation

LM_NAMESPACE_BEGIN BPTFullPath::BPTFullPath	(	int	s,
		int	t,
		const BPTSubpath &	lightSubpath,
		const BPTSubpath &	eyeSubpath
	)

Constructor. Constructs a full-path from light sub-path and eye-subpath.

Parameters

s	Number of vertices in light sub-path.
t	Number of vertices in eye sub-path.
lightSubpath	Light sub-path.
eyeSubpath	Eye sub-path.

Member Function Documentation

void BPTFullPath::DebugPrint

(

)

const

Debug print. Prints contents of the full-path.

Math::Float BPTFullPath::EvaluateFullpathPDF

(

int

i

)

const

Evaluate full-path probability density. Evaluate p_i(x_{s,t}) := p_{i,s+t-i}(x_{s,t}).

Parameters

i	Index of PDF.

Returns

Evaluated PDF.

Math::Float BPTFullPath::EvaluateFullpathPDFRatio

(

int

i

)

const

Evaluate full-path probability density ratio. Evaluate p_{i+1}(x_{s,t}) / p_i(x_{s,t}). See Equation (10.9) in [Veach 1997]. This function requires p_s(x_{s,t}) be non-zero.

Parameters

i	Index of PDF.

Returns

Evaluated PDF.

Math::Vec3 BPTFullPath::EvaluateUnweightContribution	(	const Scene &	scene,
		Math::Vec2 &	rasterPosition
	)		const

Evaluate unweight contribution C^*_{s,t}.

Parameters

scene	Scene.
rasterPosition	Raster position.

Returns

Contribution.

bool BPTFullPath::FullpathPDFIsZero

(

int

i

)

const

Check if p_i(x_{s,t}) is zero.

Parameters

i	Index of PDF.

Return values

true	Zero.
false	Non-zero.

const BPTPathVertex * BPTFullPath::FullPathVertex

(

int

i

)

const

Get i-th vertex of the full-path.

Parameters

i	Index of PDF.

Returns

Vertex.

Math::PDFEval BPTFullPath::FullPathVertexDirectionPDF	(	int	i,
		TransportDirection	transportDir
	)		const

Get i-th directional PDF evaluation of the full-path.

Parameters

i	Index of PDF.
transportDir	Transport direction.

Returns

Evaluated PDF.

Math::Float BPTFullPath::PathSelectionProbability

(

)

const

Evaluate path selection probability. Evaluates path selection probability due to Russian roulette.

Returns

Evaluated probability.

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

• /home/travis/build/hi2p-perim/lightmetrica/include/lightmetrica/bpt.fullpath.h
• /home/travis/build/hi2p-perim/lightmetrica/src/liblightmetrica/bpt.fullpath.cpp