#include "LumenSceneLighting.h"
#include "Materials/Material.h"
#include "RendererPrivate.h"
#include "ScenePrivate.h"
#include "SceneUtils.h"
#include "PipelineStateCache.h"
#include "ShaderParameterStruct.h"
#include "ShaderPermutationUtils.h"
#include "VolumeLighting.h"
#include "DistanceFieldLightingShared.h"
#include "VolumetricCloudRendering.h"
#include "LumenTracingUtils.h"
#include "LightFunctionAtlas.h"
#include "LightFunctionRendering.h"
#include "LumenSceneDirectLightingStochastic.inl"

Classes
class	FLumenGatheredLight

class	FSpliceCardPagesIntoTilesCS

class	FInitializeCardTileIndirectArgsCS

class	FCalculateCardTileDepthRangesCS

class	FBuildLightTilesCS

class	FComputeLightTileOffsetsPerLightCS

class	FCompactLightTilesCS

class	FInitializeLightTileIndirectArgsCS

class	FLumenCardBatchDirectLightingCS

class	FLumenDirectLightingShadowMaskFromLightAttenuationCS

class	FLumenDirectLightingShadowMaskFromLightAttenuationWithLightFunctionCS

class	FInitShadowTraceIndirectArgsCS

class	FLumenSceneDirectLightingTraceDistanceFieldShadowsCS

struct	FViewBatchedLightParameters

struct	FLumenPackedLight

struct	FLightTileCullContext

struct	FLumenDirectLightingTaskData

class	FLumenSceneDirectLightingStatsCS

Functions
FAutoConsoleVariableRef	CVarLumenDirectLightingOffscreenShadowingTraceMeshSDFs (TEXT("r.LumenScene.DirectLighting.OffscreenShadowing.TraceMeshSDFs"), GLumenDirectLightingOffscreenShadowingTraceMeshSDFs, TEXT("Whether to trace against Mesh Signed Distance Fields for offscreen shadowing, or to trace against the lower resolution Global SDF."), ECVF_Scalability\|ECVF_RenderThreadSafe)

FAutoConsoleVariableRef	CVarOffscreenShadowingTraceStepFactor (TEXT("r.LumenScene.DirectLighting.OffscreenShadowingTraceStepFactor"), GOffscreenShadowingTraceStepFactor, TEXT(""), ECVF_Scalability\|ECVF_RenderThreadSafe)

FAutoConsoleVariableRef	CVarLumenDirectLightingCloudTransmittance (TEXT("r.LumenScene.DirectLighting.CloudTransmittance"), GLumenDirectLightingCloudTransmittance, TEXT("Whether to sample cloud shadows when avaible."), ECVF_Scalability\|ECVF_RenderThreadSafe)

uint32	GetLumenLightingStatMode ()

	IMPLEMENT_GLOBAL_SHADER (FSpliceCardPagesIntoTilesCS, "/Engine/Private/Lumen/LumenSceneDirectLightingCulling.usf", "SpliceCardPagesIntoTilesCS", SF_Compute)

	IMPLEMENT_GLOBAL_SHADER (FCalculateCardTileDepthRangesCS, "/Engine/Private/Lumen/LumenSceneDirectLightingCulling.usf", "CalculateCardTileDepthRangesCS", SF_Compute)

	IMPLEMENT_GLOBAL_SHADER (FBuildLightTilesCS, "/Engine/Private/Lumen/LumenSceneDirectLightingCulling.usf", "BuildLightTilesCS", SF_Compute)

	IMPLEMENT_GLOBAL_SHADER (FComputeLightTileOffsetsPerLightCS, "/Engine/Private/Lumen/LumenSceneDirectLightingCulling.usf", "ComputeLightTileOffsetsPerLightCS", SF_Compute)

	IMPLEMENT_GLOBAL_SHADER (FCompactLightTilesCS, "/Engine/Private/Lumen/LumenSceneDirectLightingCulling.usf", "CompactLightTilesCS", SF_Compute)

void	ClearLumenSceneDirectLighting (const FViewInfo &View, FRDGBuilder &GraphBuilder, const FLumenSceneData &LumenSceneData, const FLumenSceneFrameTemporaries &FrameTemporaries, FLumenCardUpdateContext CardUpdateContext)

	IMPLEMENT_GLOBAL_SHADER (FLumenCardBatchDirectLightingCS, "/Engine/Private/Lumen/LumenSceneDirectLighting.usf", "LumenCardBatchDirectLightingCS", SF_Compute)

	IMPLEMENT_GLOBAL_SHADER (FLumenDirectLightingShadowMaskFromLightAttenuationCS, "/Engine/Private/Lumen/LumenSceneDirectLightingShadowMask.usf", "LumenSceneDirectLightingShadowMaskFromLightAttenuationCS", SF_Compute)

	IMPLEMENT_MATERIAL_SHADER_TYPE (, FLumenDirectLightingShadowMaskFromLightAttenuationWithLightFunctionCS, TEXT("/Engine/Private/Lumen/LumenSceneDirectLightingShadowMask.usf"), TEXT("LumenSceneDirectLightingShadowMaskFromLightAttenuationCS"), SF_Compute)

	IMPLEMENT_GLOBAL_SHADER (FLumenSceneDirectLightingTraceDistanceFieldShadowsCS, "/Engine/Private/Lumen/LumenSceneDirectLightingSoftwareRayTracing.usf", "LumenSceneDirectLightingTraceDistanceFieldShadowsCS", SF_Compute)

void	SetupLightFunctionParameters (const FViewInfo &View, const FLightSceneInfo *LightSceneInfo, float ShadowFadeFraction, FLightFunctionParameters &OutParameters)

void	SetupMeshSDFShadowInitializer (const FLightSceneInfo *LightSceneInfo, const FBox &LumenSceneBounds, FSphere &OutShadowBounds, FWholeSceneProjectedShadowInitializer &OutInitializer)

void	CullMeshObjectsForLightCards (FRDGBuilder &GraphBuilder, const FScene Scene, const FViewInfo &View, const FLightSceneInfo LightSceneInfo, EDistanceFieldPrimitiveType PrimitiveType, const FDistanceFieldObjectBufferParameters &ObjectBufferParameters, FMatrix &WorldToMeshSDFShadowValue, FLightTileIntersectionParameters &LightTileIntersectionParameters)

void	TraceDistanceFieldShadows (FRDGBuilder &GraphBuilder, const FScene *Scene, const FViewInfo &View, TRDGUniformBufferRef< FLumenCardScene > LumenCardSceneUniformBuffer, TConstArrayView< FLumenGatheredLight > GatheredLights, TConstArrayView< int32 > StandaloneLightIndices, FViewBatchedLightParameters &ViewBatchedLightParameters, const FLumenLightTileScatterParameters &LightTileScatterParameters, const LumenSceneDirectLighting::FLightDataParameters &LumenLightData, const FDistanceFieldObjectBufferParameters &ObjectBufferParameters, int32 ViewIndex, int32 NumViews, FRDGBufferUAVRef ShadowMaskTilesUAV, ERDGPassFlags ComputePassFlags)

uint32	PackRG16 (float In0, float In1)

	IMPLEMENT_GLOBAL_SHADER (FLumenSceneDirectLightingStatsCS, "/Engine/Private/Lumen/LumenSceneLightingDebug.usf", "LumenSceneDirectLightingStatsCS", SF_Compute)

Variables
int32	GLumenDirectLightingOffscreenShadowingTraceMeshSDFs = 1

float	GOffscreenShadowingTraceStepFactor = 5

int32	GLumenDirectLightingCloudTransmittance = 1

Function Documentation

◆ ClearLumenSceneDirectLighting()

void ClearLumenSceneDirectLighting	(	const FViewInfo &	View,
		FRDGBuilder &	GraphBuilder,
		const FLumenSceneData &	LumenSceneData,
		const FLumenSceneFrameTemporaries &	FrameTemporaries,
		FLumenCardUpdateContext	CardUpdateContext
	)

◆ CullMeshObjectsForLightCards()

void CullMeshObjectsForLightCards	(	FRDGBuilder &	GraphBuilder,
		const FScene *	Scene,
		const FViewInfo &	View,
		const FLightSceneInfo *	LightSceneInfo,
		EDistanceFieldPrimitiveType	PrimitiveType,
		const FDistanceFieldObjectBufferParameters &	ObjectBufferParameters,
		FMatrix &	WorldToMeshSDFShadowValue,
		FLightTileIntersectionParameters &	LightTileIntersectionParameters
	)

◆ CVarLumenDirectLightingCloudTransmittance()

FAutoConsoleVariableRef CVarLumenDirectLightingCloudTransmittance	(	TEXT("r.LumenScene.DirectLighting.CloudTransmittance")	,
		GLumenDirectLightingCloudTransmittance	,
		TEXT("Whether to sample cloud shadows when avaible.")	,
		ECVF_Scalability\|	ECVF_RenderThreadSafe
	)

◆ CVarLumenDirectLightingOffscreenShadowingTraceMeshSDFs()

FAutoConsoleVariableRef CVarLumenDirectLightingOffscreenShadowingTraceMeshSDFs	(	TEXT("r.LumenScene.DirectLighting.OffscreenShadowing.TraceMeshSDFs")	,
		GLumenDirectLightingOffscreenShadowingTraceMeshSDFs	,
		TEXT("Whether to trace against Mesh Signed Distance Fields for offscreen shadowing, or to trace against the lower resolution Global SDF.")	,
		ECVF_Scalability\|	ECVF_RenderThreadSafe
	)

◆ CVarOffscreenShadowingTraceStepFactor()

FAutoConsoleVariableRef CVarOffscreenShadowingTraceStepFactor	(	TEXT("r.LumenScene.DirectLighting.OffscreenShadowingTraceStepFactor")	,
		GOffscreenShadowingTraceStepFactor	,
		TEXT("")	,
		ECVF_Scalability\|	ECVF_RenderThreadSafe
	)

◆ GetLumenLightingStatMode()

uint32 GetLumenLightingStatMode ( )

◆ IMPLEMENT_GLOBAL_SHADER() [1/9]

IMPLEMENT_GLOBAL_SHADER	(	FBuildLightTilesCS	,
		"/Engine/Private/Lumen/LumenSceneDirectLightingCulling.usf"	,
		"BuildLightTilesCS"	,
		SF_Compute
	)

◆ IMPLEMENT_GLOBAL_SHADER() [2/9]

IMPLEMENT_GLOBAL_SHADER	(	FCalculateCardTileDepthRangesCS	,
		"/Engine/Private/Lumen/LumenSceneDirectLightingCulling.usf"	,
		"CalculateCardTileDepthRangesCS"	,
		SF_Compute
	)

◆ IMPLEMENT_GLOBAL_SHADER() [3/9]

IMPLEMENT_GLOBAL_SHADER	(	FCompactLightTilesCS	,
		"/Engine/Private/Lumen/LumenSceneDirectLightingCulling.usf"	,
		"CompactLightTilesCS"	,
		SF_Compute
	)

◆ IMPLEMENT_GLOBAL_SHADER() [4/9]

IMPLEMENT_GLOBAL_SHADER	(	FComputeLightTileOffsetsPerLightCS	,
		"/Engine/Private/Lumen/LumenSceneDirectLightingCulling.usf"	,
		"ComputeLightTileOffsetsPerLightCS"	,
		SF_Compute
	)

◆ IMPLEMENT_GLOBAL_SHADER() [5/9]

IMPLEMENT_GLOBAL_SHADER	(	FLumenCardBatchDirectLightingCS	,
		"/Engine/Private/Lumen/LumenSceneDirectLighting.usf"	,
		"LumenCardBatchDirectLightingCS"	,
		SF_Compute
	)

◆ IMPLEMENT_GLOBAL_SHADER() [6/9]

IMPLEMENT_GLOBAL_SHADER	(	FLumenDirectLightingShadowMaskFromLightAttenuationCS	,
		"/Engine/Private/Lumen/LumenSceneDirectLightingShadowMask.usf"	,
		"LumenSceneDirectLightingShadowMaskFromLightAttenuationCS"	,
		SF_Compute
	)

◆ IMPLEMENT_GLOBAL_SHADER() [7/9]

IMPLEMENT_GLOBAL_SHADER	(	FLumenSceneDirectLightingStatsCS	,
		"/Engine/Private/Lumen/LumenSceneLightingDebug.usf"	,
		"LumenSceneDirectLightingStatsCS"	,
		SF_Compute
	)

◆ IMPLEMENT_GLOBAL_SHADER() [8/9]

IMPLEMENT_GLOBAL_SHADER	(	FLumenSceneDirectLightingTraceDistanceFieldShadowsCS	,
		"/Engine/Private/Lumen/LumenSceneDirectLightingSoftwareRayTracing.usf"	,
		"LumenSceneDirectLightingTraceDistanceFieldShadowsCS"	,
		SF_Compute
	)

◆ IMPLEMENT_GLOBAL_SHADER() [9/9]

IMPLEMENT_GLOBAL_SHADER	(	FSpliceCardPagesIntoTilesCS	,
		"/Engine/Private/Lumen/LumenSceneDirectLightingCulling.usf"	,
		"SpliceCardPagesIntoTilesCS"	,
		SF_Compute
	)

◆ IMPLEMENT_MATERIAL_SHADER_TYPE()

IMPLEMENT_MATERIAL_SHADER_TYPE	(	FLumenDirectLightingShadowMaskFromLightAttenuationWithLightFunctionCS	,
		TEXT("/Engine/Private/Lumen/LumenSceneDirectLightingShadowMask.usf")	,
		TEXT("LumenSceneDirectLightingShadowMaskFromLightAttenuationCS")	,
		SF_Compute
	)

◆ PackRG16()

uint32 PackRG16	(	float	In0,
		float	In1
	)

◆ SetupLightFunctionParameters()

void SetupLightFunctionParameters	(	const FViewInfo &	View,
		const FLightSceneInfo *	LightSceneInfo,
		float	ShadowFadeFraction,
		FLightFunctionParameters &	OutParameters
	)

◆ SetupMeshSDFShadowInitializer()

void SetupMeshSDFShadowInitializer	(	const FLightSceneInfo *	LightSceneInfo,
		const FBox &	LumenSceneBounds,
		FSphere &	OutShadowBounds,
		FWholeSceneProjectedShadowInitializer &	OutInitializer
	)

◆ TraceDistanceFieldShadows()

void TraceDistanceFieldShadows	(	FRDGBuilder &	GraphBuilder,
		const FScene *	Scene,
		const FViewInfo &	View,
		TRDGUniformBufferRef< FLumenCardScene >	LumenCardSceneUniformBuffer,
		TConstArrayView< FLumenGatheredLight >	GatheredLights,
		TConstArrayView< int32 >	StandaloneLightIndices,
		FViewBatchedLightParameters &	ViewBatchedLightParameters,
		const FLumenLightTileScatterParameters &	LightTileScatterParameters,
		const LumenSceneDirectLighting::FLightDataParameters &	LumenLightData,
		const FDistanceFieldObjectBufferParameters &	ObjectBufferParameters,
		int32	ViewIndex,
		int32	NumViews,
		FRDGBufferUAVRef	ShadowMaskTilesUAV,
		ERDGPassFlags	ComputePassFlags
	)

Variable Documentation

◆ GLumenDirectLightingCloudTransmittance

int32 GLumenDirectLightingCloudTransmittance = 1

◆ GLumenDirectLightingOffscreenShadowingTraceMeshSDFs

int32 GLumenDirectLightingOffscreenShadowingTraceMeshSDFs = 1

◆ GOffscreenShadowingTraceStepFactor

float GOffscreenShadowingTraceStepFactor = 5

Classes

Functions

Variables