HairStrandsLUT.cpp File Reference

#include "HairStrandsLUT.h"
#include "HairStrandsUtils.h"
#include "Shader.h"
#include "GlobalShader.h"
#include "ShaderParameters.h"
#include "ShaderParameterStruct.h"
#include "RenderGraphUtils.h"
#include "SceneRendering.h"
#include "SystemTextures.h"
#include "DataDrivenShaderPlatformInfo.h"

Classes
class	FHairLUTCS
struct	FHairCountToCoverageData
class	FHairCoverageLUTCS

Functions
	IMPLEMENT_GLOBAL_SHADER (FHairLUTCS, "/Engine/Private/HairStrands/HairStrandsLUT.usf", "MainCS", SF_Compute)
float	GetHairCoverage (uint32 InCount, float InAvgRadius)
	Return the hair coverage for a certain hair count and normalized avg hair radius (i.e, [0..1])
float	GetHairAvgRadius (uint32 InCount, float InCoverage)
	Return the average hair normalized radius for a given hair count and a given coverage value.
	IMPLEMENT_GLOBAL_SHADER (FHairCoverageLUTCS, "/Engine/Private/HairStrands/HairStrandsLUT.usf", "MainCS", SF_Compute)
FRDGTextureRef	GetHairLUT (FRDGBuilder &GraphBuilder, const FViewInfo &View, FHairLUTType Type)
	Returns Hair LUTs. LUTs are generated on demand.
void	UpdateHairResources (FRDGBuilder &GraphBuilder, const FViewInfo &View)

Function Documentation

GetHairAvgRadius()

float GetHairAvgRadius	(	uint32	InCount,
		float	InCoverage
	)

Return the average hair normalized radius for a given hair count and a given coverage value.

GetHairCoverage()

float GetHairCoverage	(	uint32	InCount,
		float	InAvgRadius
	)

Return the hair coverage for a certain hair count and normalized avg hair radius (i.e, [0..1])

GetHairLUT()

FRDGTextureRef GetHairLUT	(	FRDGBuilder &	GraphBuilder,
		const FViewInfo &	View,
		FHairLUTType	Type
	)

Returns Hair LUTs. LUTs are generated on demand.

IMPLEMENT_GLOBAL_SHADER() [1/2]

IMPLEMENT_GLOBAL_SHADER	(	FHairCoverageLUTCS	,
		"/Engine/Private/HairStrands/HairStrandsLUT.usf"	,
		"MainCS"	,
		SF_Compute
	)

IMPLEMENT_GLOBAL_SHADER() [2/2]

IMPLEMENT_GLOBAL_SHADER	(	FHairLUTCS	,
		"/Engine/Private/HairStrands/HairStrandsLUT.usf"	,
		"MainCS"	,
		SF_Compute
	)

UpdateHairResources()

void UpdateHairResources	(	FRDGBuilder &	GraphBuilder,
		const FViewInfo &	View
	)