FImportanceTexture Struct Reference

#include <ImportanceSamplingLibrary.h>

Public Member Functions
	FImportanceTexture ()
	FImportanceTexture (UTexture2D *SourceTexture, TEnumAsByte< EImportanceWeight::Type > WeightingFunc)
	FImportanceTexture (const FImportanceTexture &Other)
	FImportanceTexture (FImportanceTexture &&Other)
FImportanceTexture &	operator= (const FImportanceTexture &Other)
FImportanceTexture &	operator= (FImportanceTexture &&Other)
void	Initialize (UTexture2D *SourceTexture, TEnumAsByte< EImportanceWeight::Type > WeightingFunc)
void	ImportanceSample (const FVector2D &Rand, int Samples, float Intensity, FVector2D &SamplePosition, FLinearColor &SampleColor, float &SampleIntensity, float &SampleSize) const
FLinearColor	GetColorBilinear (FVector2D Position, int32 Mip) const
FLinearColor	GetColorTrilinear (FVector2D Position, float Mip) const
float	ImportanceWeight (FColor Texel, TEnumAsByte< EImportanceWeight::Type > WeightingFunc) const

Public Attributes
FIntPoint	Size
int	NumMips
TArray< float >	MarginalCDF
TArray< float >	ConditionalCDF
TArray< FColor >	TextureData_DEPRECATED
TArray< FLinearColor >	LinearTextureData
TWeakObjectPtr< UTexture2D >	Texture
TEnumAsByte< EImportanceWeight::Type >	Weighting

Detailed Description

Texture processed for importance sampling Holds marginal PDF of the rows, as well as the PDF of each row

Constructor & Destructor Documentation

FImportanceTexture() [1/4]

PRAGMA_DISABLE_DEPRECATION_WARNINGS FImportanceTexture::FImportanceTexture

(

)

FImportanceTexture() [2/4]

FImportanceTexture::FImportanceTexture	(	UTexture2D *	SourceTexture,
		TEnumAsByte< EImportanceWeight::Type >	WeightingFunc
	)

FImportanceTexture() [3/4]

FImportanceTexture::FImportanceTexture ( const FImportanceTexture &  Other )

default

FImportanceTexture() [4/4]

FImportanceTexture::FImportanceTexture ( FImportanceTexture &&  Other )

default

Member Function Documentation

GetColorBilinear()

FLinearColor FImportanceTexture::GetColorBilinear	(	FVector2D	Position,
		int32	Mip
	)		const

GetColorTrilinear()

PRAGMA_ENABLE_DEPRECATION_WARNINGS FLinearColor FImportanceTexture::GetColorTrilinear	(	FVector2D	Position,
		float	Mip
	)		const

ImportanceSample()

void FImportanceTexture::ImportanceSample	(	const FVector2D &	Rand,
		int	Samples,
		float	Intensity,
		FVector2D &	SamplePosition,
		FLinearColor &	SampleColor,
		float &	SampleIntensity,
		float &	SampleSize
	)		const

Distribute sample points proportional to Texture2D luminance.

Parameters

Rand	- Random 2D point with components evenly distributed between 0 and 1
Samples	- Total number of samples that will be used
Intensity	- Overall target intensity scale @outparam SamplePosition - Importance sampled 2D output texture coordinate (0-1) @outparam SampleColor - Representative color near Position from MIP level for SampleSize @outparam SampleIntensity - Intensity of individual point @outparam SampleSize - Local density of points near Position (scaled for 1x1 texture space)

ImportanceWeight()

float FImportanceTexture::ImportanceWeight	(	FColor	Texel,
		TEnumAsByte< EImportanceWeight::Type >	WeightingFunc
	)		const

Initialize()

void FImportanceTexture::Initialize	(	UTexture2D *	SourceTexture,
		TEnumAsByte< EImportanceWeight::Type >	WeightingFunc
	)

operator=() [1/2]

FImportanceTexture & FImportanceTexture::operator= ( const FImportanceTexture &  Other )

default

operator=() [2/2]

FImportanceTexture & FImportanceTexture::operator= ( FImportanceTexture &&  Other )

default

Member Data Documentation

ConditionalCDF

TArray<float> FImportanceTexture::ConditionalCDF

LinearTextureData

TArray<FLinearColor> FImportanceTexture::LinearTextureData

MarginalCDF

TArray<float> FImportanceTexture::MarginalCDF

NumMips

int FImportanceTexture::NumMips

Size

FIntPoint FImportanceTexture::Size

Texture

TWeakObjectPtr<UTexture2D> FImportanceTexture::Texture

TextureData_DEPRECATED

TArray<FColor> FImportanceTexture::TextureData_DEPRECATED

Weighting

TEnumAsByte<EImportanceWeight::Type> FImportanceTexture::Weighting

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

• Engine/Source/Runtime/Engine/Classes/Kismet/ImportanceSamplingLibrary.h
• Engine/Source/Runtime/Engine/Private/Kismet/ImportanceSamplingLibrary.cpp