#include "LandscapeGrassMapsBuilder.h"
#include "Misc/ScopedSlowTask.h"
#include "Landscape.h"
#include "LandscapeAsyncTextureReadback.h"
#include "LandscapePrivate.h"
#include "LandscapeProxy.h"
#include "LandscapeGrassWeightExporter.h"
#include "MaterialCachedData.h"
#include "LandscapeEditTypes.h"
#include "LandscapeGrassType.h"
#include "LandscapeSubsystem.h"
#include "Logging/StructuredLog.h"
#include "EngineUtils.h"
#include "Materials/MaterialInstance.h"
#include "Stats/Stats.h"
#include "Components/InstancedStaticMeshComponent.h"
#include "LandscapeTextureHash.h"
#include "SceneInterface.h"

Namespaces
namespace	UE

namespace	UE::Landscape

Macros
#define	LOCTEXT_NAMESPACE "Landscape"

#define	GRASS_DEBUG_LOG(...) UE_LOG(LogGrass, Verbose, __VA_ARGS__)

#define	DEBUG_TRANSITION(StateRef, StageBefore, StageAfter)

Functions
	DECLARE_CYCLE_STAT (TEXT("Update Component GrassMap "), STAT_UpdateComponentGrassMaps, STATGROUP_Foliage)

	DECLARE_CYCLE_STAT (TEXT("Prioritize Pending GrassMaps"), STAT_PrioritizePendingGrassMaps, STATGROUP_Foliage)

	DECLARE_CYCLE_STAT (TEXT("Render GrassMap"), STAT_RenderGrassMap, STATGROUP_Foliage)

	DECLARE_CYCLE_STAT (TEXT("Populate GrassMap"), STAT_PopulateGrassMap, STATGROUP_Foliage)

	DECLARE_CYCLE_STAT (TEXT("Remove Grass Instances"), STAT_RemoveGrassInstances, STATGROUP_Foliage)

uint32	UE::Landscape::ComputeGrassMapGenerationHash (const ULandscapeComponent Component, UMaterialInterface Material)

uint32	UE::Landscape::ComputeGrassInstanceGenerationHash (uint32 GrassMapGenerationHash, const TArray< TObjectPtr< ULandscapeGrassType > > &GrassTypes)

LANDSCAPE_API bool	UE::Landscape::CanRenderGrassMap (ULandscapeComponent *Component)

LANDSCAPE_API bool	UE::Landscape::IsRuntimeGrassMapGenerationSupported ()

void	UE::Landscape::SubmitGPUCommands (bool bBlockUntilRTComplete, bool bBlockRTUntilGPUComplete)

Variables
int32	GGrassEnable

float	GGrassCullDistanceScale

int32	GGrassMapUseRuntimeGeneration = 0

FAutoConsoleVariableRef	CVarGrassMapUseRuntimeGeneration (TEXT("grass.GrassMap.UseRuntimeGeneration"), GGrassMapUseRuntimeGeneration, TEXT("Enable runtime grass map generation to save disk space and runtime memory. When enabled the grass density maps are not serialized and are built on the fly at runtime."))

int32	GGrassMapEvictAll = 0

FAutoConsoleVariableRef	CVarGrassMapEvictAll (TEXT("grass.GrassMap.EvictAll"), GGrassMapEvictAll, TEXT("Remove all grass maps. In editor, or if runtime generation is enabled, the grass maps will repopulate automatically."))

FString	GGrassMapRenderEveryFrame

FAutoConsoleVariableRef	CVarGrassMapRenderEveryFrame (TEXT("grass.GrassMap.RenderEveryFrame"), GGrassMapRenderEveryFrame, TEXT("Forces re-rendering the grassmap for the landscape component(s) on any actors with a name containing the given string."))

int32	GGrassMapRenderEveryFrameDelay = 0

FAutoConsoleVariableRef	CVarGrassMapRenderEveryFrameDelay (TEXT("grass.GrassMap.RenderEveryFrameDelay"), GGrassMapRenderEveryFrameDelay, TEXT("When using grass.GrassMap.RenderEveryFrame, delays this many frames in between renders. Default 0."))

int32	GGrassMapUseAsyncFetch = 0

FAutoConsoleVariableRef	CVarGrassMapUseAsyncFetch (TEXT("grass.GrassMap.UseAsyncFetch"), GGrassMapUseAsyncFetch, TEXT("Enable async fetch tasks to readback the runtime grass maps from the GPU. When disabled, it the fetch is performed on the game thread, when enabled it uses an async task instead."))

int32	GGrassMapAlwaysBuildRuntimeGenerationResources = 0

Macro Definition Documentation

◆ DEBUG_TRANSITION

#define DEBUG_TRANSITION	(	StateRef,
		StageBefore,
		StageAfter
	)

Value:

    GRASS_DEBUG_LOG(TEXT("%s %s -> %s (after %d ticks) Pend:%d Strm:%d Rend:%d Fetch:%d Pop:%d NR:%d Total:%d"), \
        StateRef.Component ? *StateRef.Component->GetName() : TEXT("<REMOVED>"), \
        TEXT(#StageBefore), \
        TEXT(#StageAfter), \
        StateRef.TickCount, \
        PendingCount, \
        StreamingCount, \
        RenderingCount, \
        AsyncFetchCount, \
        PopulatedCount, \
        NotReadyCount, \
        ComponentStates.Num())

◆ GRASS_DEBUG_LOG

#define GRASS_DEBUG_LOG ( ... ) UE_LOG(LogGrass, Verbose, __VA_ARGS__)

◆ LOCTEXT_NAMESPACE

#define LOCTEXT_NAMESPACE "Landscape"

Function Documentation

◆ DECLARE_CYCLE_STAT() [1/5]

DECLARE_CYCLE_STAT	(	TEXT("Populate GrassMap")	,
		STAT_PopulateGrassMap	,
		STATGROUP_Foliage
	)

◆ DECLARE_CYCLE_STAT() [2/5]

DECLARE_CYCLE_STAT	(	TEXT("Prioritize Pending GrassMaps")	,
		STAT_PrioritizePendingGrassMaps	,
		STATGROUP_Foliage
	)

◆ DECLARE_CYCLE_STAT() [3/5]

DECLARE_CYCLE_STAT	(	TEXT("Remove Grass Instances")	,
		STAT_RemoveGrassInstances	,
		STATGROUP_Foliage
	)

◆ DECLARE_CYCLE_STAT() [4/5]

DECLARE_CYCLE_STAT	(	TEXT("Render GrassMap")	,
		STAT_RenderGrassMap	,
		STATGROUP_Foliage
	)

◆ DECLARE_CYCLE_STAT() [5/5]

DECLARE_CYCLE_STAT	(	TEXT("Update Component GrassMap ")	,
		STAT_UpdateComponentGrassMaps	,
		STATGROUP_Foliage
	)

Variable Documentation

◆ CVarGrassMapEvictAll

FAutoConsoleVariableRef CVarGrassMapEvictAll(TEXT("grass.GrassMap.EvictAll"), GGrassMapEvictAll, TEXT("Remove all grass maps. In editor, or if runtime generation is enabled, the grass maps will repopulate automatically."))	(	TEXT("grass.GrassMap.EvictAll")	,
		GGrassMapEvictAll	,
		TEXT("Remove all grass maps. In editor, or if runtime generation is enabled, the grass maps will repopulate automatically.")
	)

◆ CVarGrassMapRenderEveryFrame

FAutoConsoleVariableRef CVarGrassMapRenderEveryFrame(TEXT("grass.GrassMap.RenderEveryFrame"), GGrassMapRenderEveryFrame, TEXT("Forces re-rendering the grassmap for the landscape component(s) on any actors with a name containing the given string."))	(	TEXT("grass.GrassMap.RenderEveryFrame")	,
		GGrassMapRenderEveryFrame	,
		TEXT("Forces re-rendering the grassmap for the landscape component(s) on any actors with a name containing the given string.")
	)

◆ CVarGrassMapRenderEveryFrameDelay

FAutoConsoleVariableRef CVarGrassMapRenderEveryFrameDelay(TEXT("grass.GrassMap.RenderEveryFrameDelay"), GGrassMapRenderEveryFrameDelay, TEXT("When using grass.GrassMap.RenderEveryFrame, delays this many frames in between renders. Default 0."))	(	TEXT("grass.GrassMap.RenderEveryFrameDelay")	,
		GGrassMapRenderEveryFrameDelay	,
		TEXT("When using grass.GrassMap.RenderEveryFrame, delays this many frames in between renders. Default 0.")
	)

◆ CVarGrassMapUseAsyncFetch

FAutoConsoleVariableRef CVarGrassMapUseAsyncFetch(TEXT("grass.GrassMap.UseAsyncFetch"), GGrassMapUseAsyncFetch, TEXT("Enable async fetch tasks to readback the runtime grass maps from the GPU. When disabled, it the fetch is performed on the game thread, when enabled it uses an async task instead."))	(	TEXT("grass.GrassMap.UseAsyncFetch")	,
		GGrassMapUseAsyncFetch	,
		TEXT("Enable async fetch tasks to readback the runtime grass maps from the GPU. When disabled, it the fetch is performed on the game thread, when enabled it uses an async task instead.")
	)

◆ CVarGrassMapUseRuntimeGeneration

FAutoConsoleVariableRef CVarGrassMapUseRuntimeGeneration(TEXT("grass.GrassMap.UseRuntimeGeneration"), GGrassMapUseRuntimeGeneration, TEXT("Enable runtime grass map generation to save disk space and runtime memory. When enabled the grass density maps are not serialized and are built on the fly at runtime."))	(	TEXT("grass.GrassMap.UseRuntimeGeneration")	,
		GGrassMapUseRuntimeGeneration	,
		TEXT("Enable runtime grass map generation to save disk space and runtime memory. When enabled the grass density maps are not serialized and are built on the fly at runtime.")
	)

◆ GGrassCullDistanceScale

float GGrassCullDistanceScale

extern

◆ GGrassEnable

int32 GGrassEnable

extern

◆ GGrassMapAlwaysBuildRuntimeGenerationResources

int32 GGrassMapAlwaysBuildRuntimeGenerationResources = 0

◆ GGrassMapEvictAll

int32 GGrassMapEvictAll = 0

◆ GGrassMapRenderEveryFrame

FString GGrassMapRenderEveryFrame

◆ GGrassMapRenderEveryFrameDelay

int32 GGrassMapRenderEveryFrameDelay = 0

◆ GGrassMapUseAsyncFetch

int32 GGrassMapUseAsyncFetch = 0

◆ GGrassMapUseRuntimeGeneration

int32 GGrassMapUseRuntimeGeneration = 0

Namespaces

Macros

Functions

Variables