SceneOcclusion.cpp File Reference

#include "SceneOcclusion.h"
#include "EngineGlobals.h"
#include "SceneRendering.h"
#include "DeferredShadingRenderer.h"
#include "DynamicPrimitiveDrawing.h"
#include "Engine/Level.h"
#include "ScenePrivate.h"
#include "ScreenRendering.h"
#include "PostProcess/SceneFilterRendering.h"
#include "PostProcess/PostProcessing.h"
#include "PlanarReflectionSceneProxy.h"
#include "PipelineStateCache.h"
#include "ShaderParameterStruct.h"
#include "VisualizeTexture.h"
#include "ProfilingDebugging/CpuProfilerTrace.h"
#include "PixelShaderUtils.h"
#include "RenderCore.h"
#include "MobileBasePassRendering.h"
#include "Misc/Compression.h"

Classes
class	FOcclusionQueryIndexBuffer
class	FHZBTestPS
class	FOcclusionFeedbackVS
class	FOcclusionFeedbackPS

Enumerations
enum	EShadowOcclusionQueryIntersectionMode { SOQ_None , SOQ_LightInfluenceSphere , SOQ_NearPlaneVsShadowFrustum }

Functions
FAutoConsoleVariableRef	CVarOcclusionCullCascadedShadowMaps (TEXT("r.Shadow.OcclusionCullCascadedShadowMaps"), GOcclusionCullCascadedShadowMaps, TEXT("Whether to use occlusion culling on cascaded shadow maps. Disabled by default because rapid view changes reveal new regions too quickly for latent occlusion queries to work with."), ECVF_Scalability|ECVF_RenderThreadSafe)
bool	UseDownsampledOcclusionQueries ()
	DEFINE_GPU_STAT (HZB)
	DECLARE_GPU_DRAWCALL_STAT (BeginOcclusionTests)
	IMPLEMENT_SHADER_TYPE (, FOcclusionQueryVS, TEXT("/Engine/Private/OcclusionQueryVertexShader.usf"), TEXT("Main"), SF_Vertex)
	IMPLEMENT_SHADER_TYPE (, FOcclusionQueryPS, TEXT("/Engine/Private/OcclusionQueryPixelShader.usf"), TEXT("Main"), SF_Pixel)
	IMPLEMENT_GLOBAL_SHADER (FHZBTestPS, "/Engine/Private/HZBOcclusion.usf", "HZBTestPS", SF_Pixel)
void	AllocateOcclusionTests (const FScene *Scene, FViewOcclusionQueriesPerView &QueriesPerView, TArrayView< FViewInfo > Views, TArrayView< const FVisibleLightInfo > VisibleLightInfos)
	DECLARE_CYCLE_STAT (TEXT("OcclusionSubmittedFence Dispatch"), STAT_OcclusionSubmittedFence_Dispatch, STATGROUP_SceneRendering)
	DECLARE_CYCLE_STAT (TEXT("OcclusionSubmittedFence Wait"), STAT_OcclusionSubmittedFence_Wait, STATGROUP_SceneRendering)
	IMPLEMENT_GLOBAL_SHADER (FOcclusionFeedbackVS,"/Engine/Private/OcclusionFeedbackShaders.usf","MainVS", SF_Vertex)
	IMPLEMENT_GLOBAL_SHADER (FOcclusionFeedbackPS,"/Engine/Private/OcclusionFeedbackShaders.usf","MainPS", SF_Pixel)

Variables
int32	GAllowPrecomputedVisibility = 1
int32	GOcclusionCullCascadedShadowMaps = 0
int32	GEnableComputeBuildHZB = 1
int32	GDownsampledOcclusionQueries = 0
FOcclusionRandomStream	GOcclusionRandomStream
TGlobalResource< FOcclusionQueryIndexBuffer >	GOcclusionQueryIndexBuffer
int32	GOcclusionFeeback_Blending = 1

Enumeration Type Documentation

EShadowOcclusionQueryIntersectionMode

enum EShadowOcclusionQueryIntersectionMode

Enumerator
SOQ_None
SOQ_LightInfluenceSphere
SOQ_NearPlaneVsShadowFrustum

Function Documentation

AllocateOcclusionTests()

void AllocateOcclusionTests	(	const FScene *	Scene,
		FViewOcclusionQueriesPerView &	QueriesPerView,
		TArrayView< FViewInfo >	Views,
		TArrayView< const FVisibleLightInfo >	VisibleLightInfos
	)

CVarOcclusionCullCascadedShadowMaps()

FAutoConsoleVariableRef CVarOcclusionCullCascadedShadowMaps	(	TEXT("r.Shadow.OcclusionCullCascadedShadowMaps")	,
		GOcclusionCullCascadedShadowMaps	,
		TEXT("Whether to use occlusion culling on cascaded shadow maps. Disabled by default because rapid view changes reveal new regions too quickly for latent occlusion queries to work with.")	,
		ECVF_Scalability|	ECVF_RenderThreadSafe
	)

DECLARE_CYCLE_STAT() [1/2]

DECLARE_CYCLE_STAT	(	TEXT("OcclusionSubmittedFence Dispatch")	,
		STAT_OcclusionSubmittedFence_Dispatch	,
		STATGROUP_SceneRendering
	)

DECLARE_CYCLE_STAT() [2/2]

DECLARE_CYCLE_STAT	(	TEXT("OcclusionSubmittedFence Wait")	,
		STAT_OcclusionSubmittedFence_Wait	,
		STATGROUP_SceneRendering
	)

DECLARE_GPU_DRAWCALL_STAT()

DECLARE_GPU_DRAWCALL_STAT

(

BeginOcclusionTests

)

DEFINE_GPU_STAT()

DEFINE_GPU_STAT

(

HZB

)

IMPLEMENT_GLOBAL_SHADER() [1/3]

IMPLEMENT_GLOBAL_SHADER	(	FHZBTestPS	,
		"/Engine/Private/HZBOcclusion.usf"	,
		"HZBTestPS"	,
		SF_Pixel
	)

IMPLEMENT_GLOBAL_SHADER() [2/3]

IMPLEMENT_GLOBAL_SHADER	(	FOcclusionFeedbackPS	,
		"/Engine/Private/OcclusionFeedbackShaders.usf"	,
		"MainPS"	,
		SF_Pixel
	)

IMPLEMENT_GLOBAL_SHADER() [3/3]

IMPLEMENT_GLOBAL_SHADER	(	FOcclusionFeedbackVS	,
		"/Engine/Private/OcclusionFeedbackShaders.usf"	,
		"MainVS"	,
		SF_Vertex
	)

IMPLEMENT_SHADER_TYPE() [1/2]

IMPLEMENT_SHADER_TYPE	(	FOcclusionQueryPS	,
		TEXT("/Engine/Private/OcclusionQueryPixelShader.usf")	,
		TEXT("Main")	,
		SF_Pixel
	)

IMPLEMENT_SHADER_TYPE() [2/2]

IMPLEMENT_SHADER_TYPE	(	FOcclusionQueryVS	,
		TEXT("/Engine/Private/OcclusionQueryVertexShader.usf")	,
		TEXT("Main")	,
		SF_Vertex
	)

UseDownsampledOcclusionQueries()

bool UseDownsampledOcclusionQueries

(

)

Variable Documentation

GAllowPrecomputedVisibility

int32 GAllowPrecomputedVisibility = 1

GDownsampledOcclusionQueries

int32 GDownsampledOcclusionQueries = 0

GEnableComputeBuildHZB

int32 GEnableComputeBuildHZB = 1

GOcclusionCullCascadedShadowMaps

int32 GOcclusionCullCascadedShadowMaps = 0

GOcclusionFeeback_Blending

int32 GOcclusionFeeback_Blending = 1

GOcclusionQueryIndexBuffer

TGlobalResource<FOcclusionQueryIndexBuffer> GOcclusionQueryIndexBuffer

GOcclusionRandomStream

FOcclusionRandomStream GOcclusionRandomStream

Random table for occlusion