Unreal Engine 4.26 Documentation

Unreal Engine 4.27 Documentation

Unreal Engine 5.0 Documentation

Unreal Engine 5.1 Documentation

Unreal Engine 5.2 Documentation

Unreal Engine 5.3 Documentation

> Unreal Engine API Reference > Runtime > Engine > Engine > UEngine

Light Theme

Dark Theme

UEngine

Abstract base class of all Engine classes, responsible for management of systems critical to editor or game systems.

Windows

MacOS

Linux

Inheritance Hierarchy

UObjectBase

UObjectBaseUtility

UObject

UEngine

UEditorEngine

UUnrealEdEngine

UGameEngine

UDisplayClusterGameEngine

References

Module	Engine
Header	/Engine/Source/Runtime/Engine/Classes/Engine/Engine.h
Include	#include "Engine/Engine.h"

Syntax

class UEngine :
public UObject,
public FExec

Remarks

Abstract base class of all Engine classes, responsible for management of systems critical to editor or game systems. Also defines default classes for certain engine systems.

Variables

	Name	Description
TArray< FClassR...	ActiveClassRedirects
TArray< FGameNa...	ActiveGameNameRedirects	Deprecated rules for redirecting renamed objects, replaced by the CoreRedirects system
TWeakObjectPtr<...	ActiveMatinee	The "outermost" active matinee, if any.
TSharedPtr< FPe...	ActivePerformanceChart	Active FPS chart (initialized by startfpschart, finalized by stopfpschart)
TArray< TShared...	ActivePerformanceDataConsumers	List of all active performance consumers
TArray< FPlugin...	ActivePluginRedirects
TArray< FStruct...	ActiveStructRedirects
TArray< FString...	AdditionalFontNames	Sets additional fonts that will be loaded at startup and available using GetAdditionalFont.
FSoftClassPath	AIControllerClassName	Sets the class to be used as the default AIController class for pawns.
UMaterial *	ArrowMaterial	Material that 'fakes' lighting, used for arrows, widgets.
FSoftObjectPath	ArrowMaterialName	Path of the material that 'fakes' lighting, used for arrows, widgets.
UMaterialInstan...	ArrowMaterialYellow	Arrow material instance with yellow color.
UAssetManager &...	AssetManager	A UObject spawned at initialization time to handle runtime asset loading and management
FSoftClassPath	AssetManagerClassName	Sets the class to spawn as the global AssetManager, configurable per game.
FAudioDeviceMan...	AudioDeviceManager	The audio device manager
TSubclassOf< cl...	AvoidanceManagerClass
FSoftClassPath	AvoidanceManagerClassName	Sets the AvoidanceManager class, which can be overridden to change AI crowd behavior.
uint32: 1	bAllowMatureLanguage	Whether to play mature language sound nodes
uint32: 1	bAllowMultiThreadedAnimationUpdate	Controls whether by default we allow anim blueprint graph updates to be performed on non-game threads.
uint32: 1	bCanBlueprintsTickByDefault	Controls whether Blueprint subclasses of actors or components can tick by default.
uint32: 1	bCheckForMultiplePawnsSpawnedInAFrame	Whether we should check for more than N pawns spawning in a single frame.
uint32: 1	bDisableAILogging	Determines whether AI logging should be processed or not
FBeginStreaming...	BeginStreamingPauseDelegate
uint32: 1	bEnableEditorPSysRealtimeLOD	Controls whether cascade particle system LODs are updated in real time, or use the set value
uint32: 1	bEnableOnScreenDebugMessages	If true, then disable OnScreenDebug messages. Can be toggled in real-time.
uint32: 1	bEnableOnScreenDebugMessagesDisplay	If true, then disable the display of OnScreenDebug messages (used when running)
uint32	bEnableVisualLogRecordingOnStart	If true, the visual logger will start recording as soon as the engine starts
uint32: 1	bForceDisableFrameRateSmoothing	Hook for external systems to transiently and forcibly disable framerate smoothing without stomping the original setting.
bool	bGenerateDefaultTimecode	Generate a default timecode from the computer clock when there is no timecode provider.
bool	bIsInitialized	For IsInitialized()
uint32: 1	bLockReadOnlyLevels	True if the the user cannot modify levels that are read only.
UTexture2D *...	BlueNoiseTexture	Tiled blue-noise texture
FSoftObjectPath	BlueNoiseTextureName	Path of the tiled blue-noise texture
UMaterial *	BoneWeightMaterial	Material used to render bone weights on skeletal meshes
FSoftObjectPath	BoneWeightMaterialName	Path of the material used to render bone weights on skeletal meshes
uint32: 1	bOptimizeAnimBlueprintMemberVariableAccess	Controls whether anim blueprint nodes that access member variables of their class directly should use the optimized path that avoids a thunk to the Blueprint VM.
uint32: 1	bPauseOnLossOfFocus	Whether to pause the game if focus is lost.
uint32: 1	bRenderLightMapDensityGrayscale	If true, then render gray scale density.
uint32: 1	bSmoothFrameRate	Whether to enable framerate smoothing.
float	BSPSelectionHighlightIntensity	Used to alter the intensity level of the selection highlight on selected BSP surfaces
uint32: 1	bStartedLoadMapMovie	True if the loading movie was started during LoadMap().
uint32: 1	bSubtitlesEnabled	Flag for completely disabling subtitles for localized sounds.
uint32: 1	bSubtitlesForcedOff	Flag for forcibly disabling subtitles even if you try to turn them back on they will be off
uint32: 1	bSuppressMapWarnings	If true, then skip drawing map warnings on screen even in non (UE_BUILD_SHIPPING \|\| UE_BUILD_TEST) builds
uint32: 1	bUseFixedFrameRate	Whether to use a fixed framerate.
FColor	C_AddWire
FColor	C_BrushShape
FColor	C_BrushWire
FColor	C_BSPCollision
FColor	C_NonSolidWire
FColor	C_OrthoBackground
FColor	C_ScaleBoxHi
FColor	C_SemiSolidWire
FColor	C_SubtractWire
FColor	C_Volume
FColor	C_VolumeCollision
FColor	C_WireBackground
FColor	C_WorldBox
float	CameraRotationThreshold	Camera rotation (deg) beyond which occlusion queries are ignored from previous frame (because they are likely not valid)
float	CameraTranslationThreshold	Camera movement beyond which occlusion queries are ignored from previous frame (because they are likely not valid)
UMaterial *	ClothPaintMaterial	Materials used to render cloth properties on skeletal meshes
UMaterialInstan...	ClothPaintMaterialInstance
FSoftObjectPath	ClothPaintMaterialName	Name of the material used to render cloth in the clothing tools
UMaterial *	ClothPaintMaterialWireframe
UMaterialInstan...	ClothPaintMaterialWireframeInstance
FSoftObjectPath	ClothPaintMaterialWireframeName	Name of the material used to render cloth wireframe in the clothing tools
TSubclassOf< cl...	ConsoleClass
FSoftClassPath	ConsoleClassName	Sets the class to use for the game console summoned with ~
UMaterial *	ConstraintLimitMaterial	Material used to render constraint limits
UMaterialInstan...	ConstraintLimitMaterialPrismatic
UMaterialInstan...	ConstraintLimitMaterialX
UMaterialInstan...	ConstraintLimitMaterialXAxis
UMaterialInstan...	ConstraintLimitMaterialY
UMaterialInstan...	ConstraintLimitMaterialYAxis
UMaterialInstan...	ConstraintLimitMaterialZ
UMaterialInstan...	ConstraintLimitMaterialZAxis
FSoftClassPath	CustomTimeStepClassName	Override how the Engine process the Framerate/Timestep.
UMaterial *	DebugEditorMaterial	A material used to render debug meshes.
FSoftObjectPath	DebugEditorMaterialName	A material used to render debug opaque material.
UMaterial *	DebugMeshMaterial	A material used to render debug meshes.
FSoftObjectPath	DebugMeshMaterialName	Path of the default material for debug mesh
UTexture2D *...	DefaultBloomKernelTexture	Texture used to bloom when using FFT, mimics characteristic bloom produced in a camera from a signle bright source
FSoftObjectPath	DefaultBloomKernelTextureName	Path of the texture used to bloom when using FFT, mimics characteristic bloom produced in a camera from a signle bright source
FSoftClassPath	DefaultBlueprintBaseClassName	Sets the base class to use for new blueprints created in the editor, configurable on a per-game basis
UTexture2D *...	DefaultBokehTexture	Texture used to blur out of focus content, mimics the Bokeh shape of actual cameras
FSoftObjectPath	DefaultBokehTextureName	Path of the texture used to blur out of focus content, mimics the Bokeh shape of actual cameras
UTexture2D *...	DefaultBSPVertexTexture	Texture used to render a vertex in the editor
FSoftObjectPath	DefaultBSPVertexTextureName	Path of the texture used to render a vertex in the editor
UTexture *	DefaultDiffuseTexture	A global default diffuse texture.
FSoftObjectPath	DefaultDiffuseTextureName	Path of the global default diffuse texture.
UPhysicalMateri...	DefaultPhysMaterial	PhysicalMaterial to use if none is defined for a particular object.
FSoftObjectPath	DefaultPhysMaterialName	Path of the PhysicalMaterial to use if none is defined for a particular object.
UTexture2D *...	DefaultTexture	A global default texture.
FSoftObjectPath	DefaultTextureName	Path of the global default texture that is used when no texture is specified.
TArray< FString...	DeferredCommands	Array of deferred command strings/ execs that get executed at the end of the frame
float	DisplayGamma	Current display gamma setting
UMaterial *	EditorBrushMaterial	A material used to render the sides of the builder brush/volumes/etc.
FSoftObjectPath	EditorBrushMaterialName	Path of the material used to render the sides of the builder brush/volumes/etc.
UMaterial *	EmissiveMeshMaterial	A material used to render emissive meshes (e.g. light source surface).
FSoftObjectPath	EmissiveMeshMaterialName	Path of the default material for emissive mesh
FEndStreamingPa...	EndStreamingPauseDelegate
IEngineLoop ...	EngineLoop	Engine loop, used for callbacks from the engine module into launch.
TSharedPtr< cla...	EyeTrackingDevice	Reference to the HMD device that is attached, if any
float	FixedFrameRate	The fixed framerate to use.
FDirectoryPath	GameScreenshotSaveDirectory	The save directory for newly created screenshots
UObject *	GameSingleton	A UObject spawned at initialization time to handle game-specific data
FSoftClassPath	GameSingletonClassName	Sets the class for a global object spawned at startup to handle game-specific data.
UGameUserSettin...	GameUserSettings	Global instance of the user game settings
TSubclassOf< cl...	GameUserSettingsClass
FSoftClassPath	GameUserSettingsClassName	Sets the GameUserSettings class, which can be overridden to support game-specific options for Graphics/Sound/Gameplay.
UGameViewportCl...	GameViewport	The view port representing the current game instance. Can be 0 so don't use without checking.
TSubclassOf< cl...	GameViewportClientClass
FSoftClassPath	GameViewportClientClassName	Sets the class to use for the game viewport client, which can be overridden to change game-specific input and display behavior.
float	GenerateDefaultTimecodeFrameDelay	Number of frames to subtract from generated default timecode.
FFrameRate	GenerateDefaultTimecodeFrameRate	When generating a default timecode (bGenerateDefaultTimecode is true and no timecode provider is set) at which frame rate it should be generated (number of frames).
UMaterial *	GeomMaterial	A translucent material used to render things in geometry mode.
FSoftObjectPath	GeomMaterialName	Path of the translucent material used to render things in geometry mode.
UTexture2D *...	HighFrequencyNoiseTexture	Texture used to get random image grain values for post processing
FSoftObjectPath	HighFrequencyNoiseTextureName	Path of the texture used to get random image grain values for post processing
TArray< FLinear...	HLODColorationColors	The colors used to render LOD coloration.
float	IdealLightMapDensity	Ideal lightmap density value for coloring.
UMaterial *	InvalidLightmapSettingsMaterial	Material that renders a message about lightmap settings being invalid.
FSoftObjectPath	InvalidLightmapSettingsMaterialName	Path of the material that renders a message about lightmap settings being invalid.
FSoftObjectPath	LargeFontName	Sets the font used for large engine text
UMaterial *	LevelColorationLitMaterial	Material used for visualizing level membership in lit view port modes.
FString	LevelColorationLitMaterialName	Path of the material used for visualizing level membership in lit view port modes.
UMaterial *	LevelColorationUnlitMaterial	Material used for visualizing level membership in unlit view port modes.
FString	LevelColorationUnlitMaterialName	Path of the material used for visualizing level membership in unlit view port modes.
TSubclassOf< cl...	LevelScriptActorClass
FSoftClassPath	LevelScriptActorClassName	Sets the Level Script Actor class, which can be overridden to allow game-specific behavior in per-map blueprint scripting
TArray< FLinear...	LightComplexityColors	The colors used to render light complexity.
FLinearColor	LightingOnlyBrightness	Color used for the lighting only render mode
UMaterial *	LightingTexelDensityMaterial	Material used for visualizing lighting only w/ lightmap texel density.
FString	LightingTexelDensityName	Path of the material used for visualizing lighting only w/ lightmap texel density.
FLinearColor	LightMapDensitySelectedColor	The color to render selected objects in for LightMap Density view mode.
UTexture2D *...	LightMapDensityTexture	Texture used to display LightMapDensity
FSoftObjectPath	LightMapDensityTextureName	Path of the texture used to display LightMapDensity
FLinearColor	LightMapDensityVertexMappedColor	The color to render vertex mapped objects in for LightMap Density view mode.
TSubclassOf< cl...	LocalPlayerClass
FSoftClassPath	LocalPlayerClassName	Sets the class to use for local players, which can be overridden to store game-specific information for a local player.
TArray< FLinear...	LODColorationColors	The colors used to render LOD coloration.
FAudioDeviceHan...	MainAudioDeviceHandle	Audio device handle to the main audio device.
float	MaxES3PixelShaderAdditiveComplexityCount
int32	MaximumLoopIterationCount	Script maximum loop iteration count used as a threshold to warn users about script execution runaway
float	MaxLightMapDensity	Maximum lightmap density value for coloring.
float	MaxOcclusionPixelsFraction	Max screen pixel fraction where retesting when unoccluded is worth the GPU time.
int32	MaxParticleResize	The maximum allowed size to a ParticleEmitterInstance::Resize call.
int32	MaxParticleResizeWarn	If the resize request is larger than this, spew out a warning to the log
float	MaxPixelShaderAdditiveComplexityCount	Complexity limits for the various complexity view mode combinations.
FSoftObjectPath	MediumFontName	Sets the font used for medium engine text
float	MinDesiredFrameRate	Minimum desired framerate setting, below this frame rate visual detail may be lowered
UTexture2D *...	MiniFontTexture	Texture used to do font rendering in shaders
FSoftObjectPath	MiniFontTextureName	Path of the texture used to do font rendering in shaders
float	MinLightMapDensity	Minimum lightmap density value for coloring.
TSubclassOf< cl...	NavigationSystemClass	Sets the class to use for NavigationSystem, which can be overridden to change game-specific navigation/AI behavior.
FSoftClassPath	NavigationSystemClassName
TSubclassOf< cl...	NavigationSystemConfigClass
FSoftClassPath	NavigationSystemConfigClassName	Sets the Navigation System Config class, which can be overridden to change game-specific navigation/AI behavior.
float	NearClipPlane	The distance of the camera's near clipping plane.
float	NetClientTicksPerSecond	Number of times to tick each client per second
TArray< FNetDri...	NetDriverDefinitions	A list of named UNetDriver definitions
float	NetErrorLogInterval	Amount of time in seconds between network error logging
FOnNetworkDDoSE...	NetworkDDoSEscalationEvent
FOnNetworkFailu...	NetworkFailureEvent
FOnNetworkLagSt...	NetworkLagStateChangedEvent
int32	NextWorldContextHandle
int32	NumPawnsAllowedToBeSpawnedInAFrame	If bCheckForMultiplePawnsSpawnedInAFrame==true, then we will check to see that no more than this number of pawns are spawned in a frame.
FEngineHitchDet...	OnHitchDetectedDelegate	Delegate called when FPS charting detects a hitch (it is not triggered if there are no active performance data consumers).
FString	ParticleEventManagerClassPath	Sets the class to use to spawn a ParticleEventManager that can handle game-specific particle system behavior
TArray< struct ...	PendingDroppedNotes	List of notes to place during Play in Editor
UMaterial *	PhysicalMaterialMaskMaterial	A material used to render physical material mask on mesh.
FSoftObjectPath	PhysicalMaterialMaskMaterialName	A material used to render physical material mask on mesh.
TSubclassOf< cl...	PhysicsCollisionHandlerClass
FSoftClassPath	PhysicsCollisionHandlerClassName	Sets the PhysicsCollisionHandler class to use by default, which can be overridden to change game-specific behavior when objects collide using physics.
TSharedPtr< IMe...	PortalRpcClient	Portal RPC client.
TSharedPtr< IPo...	PortalRpcLocator	Portal RPC server locator.
FPostRenderDele...	PostRenderDelegate	Delegate called just after to rendering.
UTexture2D *...	PreIntegratedSkinBRDFTexture	Texture used for pre-integrated skin shading
FSoftObjectPath	PreIntegratedSkinBRDFTextureName	Path of the texture used for pre-integrated skin shading
FPreRenderDeleg...	PreRenderDelegate	Delegate called just prior to rendering.
UMaterial *	PreviewShadowsIndicatorMaterial	Material that renders a message about preview shadows being used.
FSoftObjectPath	PreviewShadowsIndicatorMaterialName	Path of the material that renders a message about preview shadows being used.
float	PrimitiveProbablyVisibleTime	The amount of time a primitive is considered to be probably visible after it was last actually visible.
TArray< FLinear...	QuadComplexityColors	The colors used to render quad complexity.
UMaterial *	RemoveSurfaceMaterial	Material used to indicate that the associated BSP surface should be removed.
FSoftObjectPath	RemoveSurfaceMaterialName	Path of the material used to indicate that the associated BSP surface should be removed.
float	RenderLightMapDensityColorScale	The scale factor when rendering color density.
float	RenderLightMapDensityGrayscaleScale	The scale factor when rendering gray scale density.
float	RunningAverageDeltaTime
TArray< FString...	RuntimeServerActors	Runtime-modified list of server actors, allowing plugins to use serveractors, without permanently adding them to config files
float	SelectionHighlightIntensity	Used to alter the intensity level of the selection highlight on selected objects
float	SelectionHighlightIntensityBillboards	Used to alter the intensity level of the selection highlight on selected billboard objects
TArray< FString...	ServerActors	A configurable list of actors that are automatically spawned upon server startup (just prior to InitGame)
TSharedPtr< FTy...	ServiceDependencies	Holds a type container for service dependencies.
TSharedPtr< IPo...	ServiceLocator	Holds registered service instances.
UMaterial *	ShadedLevelColorationLitMaterial	Material used for visualizing level membership in lit view port modes.
FString	ShadedLevelColorationLitMaterialName	Path of the material used for visualizing level membership in lit view port modes.
UMaterial *	ShadedLevelColorationUnlitMaterial	Material used for visualizing level membership in unlit view port modes.
FString	ShadedLevelColorationUnlitMaterialName	Path of the material used for visualizing level membership in unlit view port modes.
TArray< FLinear...	ShaderComplexityColors	The colors used to render shader complexity.
FSoftObjectPath	SmallFontName	Sets the font used for small engine text, used for most debug displays
FFloatRange	SmoothedFrameRateRange	Range of framerates in which smoothing will kick in
TArray< struct ...	StatColorMappings	Colors used to display specific profiling stats
TArray< FLinear...	StationaryLightOverlapColors	The colors used to render stationary light overlap.
TSharedPtr< cla...	StereoRenderingDevice	Reference to the stereoscopic rendering interface, if any
TArray< FLinear...	StreamingAccuracyColors	The colors used for texture streaming accuracy debug view modes.
float	StreamingDistanceFactor	Fudge factor for tweaking the distance based miplevel determination
FSoftObjectPath	SubtitleFontName	Sets the font used by the default Subtitle Manager
FSoftClassPath	TimecodeProviderClassName	Set TimecodeProvider when the engine is started.
FSoftObjectPath	TinyFontName	Sets the font used for the smallest engine text
FString	TransitionDescription	The current transition description text.
FString	TransitionGameMode	The gamemode for the destination map
ETransitionType	TransitionType	The state of the current map transition.
FOnTravelFailur...	TravelFailureEvent
UMaterial *	VertexColorMaterial	Material used to visualize vertex colors as emissive
FString	VertexColorMaterialName	Path of the material used to visualize vertex colors as emissive
UMaterial *	VertexColorViewModeMaterial_AlphaAsColor	Material for visualizing vertex colors on meshes in the scene (alpha channel as color)
UMaterial *	VertexColorViewModeMaterial_BlueOnly	Material for visualizing vertex colors on meshes in the scene (blue only)
UMaterial *	VertexColorViewModeMaterial_ColorOnly	Material for visualizing vertex colors on meshes in the scene (color only, no alpha)
UMaterial *	VertexColorViewModeMaterial_GreenOnly	Material for visualizing vertex colors on meshes in the scene (green only)
UMaterial *	VertexColorViewModeMaterial_RedOnly	Material for visualizing vertex colors on meshes in the scene (red only)
FString	VertexColorViewModeMaterialName_AlphaAsColor	Path of the material for visualizing vertex colors on meshes in the scene (alpha channel as color)
FString	VertexColorViewModeMaterialName_BlueOnly	Path of the material for visualizing vertex colors on meshes in the scene (blue only)
FString	VertexColorViewModeMaterialName_ColorOnly	Path of the material for visualizing vertex colors on meshes in the scene (color only, no alpha)
FString	VertexColorViewModeMaterialName_GreenOnly	Path of the material for visualizing vertex colors on meshes in the scene (green only)
FString	VertexColorViewModeMaterialName_RedOnly	Path of the material for visualizing vertex colors on meshes in the scene (red only)
TSharedPtr< FSc...	ViewExtensions	Extensions that can modify view parameters on the render thread.
UTexture *	WeightMapPlaceholderTexture	Texture used as a placeholder for terrain weight-maps to give the material the correct texture format.
FSoftObjectPath	WeightMapPlaceholderTextureName	Path of the texture used as a placeholder for terrain weight-maps to give the material the correct texture format.
UMaterial *	WireframeMaterial	The material used to render wireframe meshes.
FString	WireframeMaterialName	Path of the material used to render wireframe meshes in the editor and debug tools.
FWorldAddedEven...	WorldAddedEvent	Broadcasts when a world is added.
FWorldDestroyed...	WorldDestroyedEvent	Broadcasts when a world is destroyed.
TIndirectArray<...	WorldList
TSubclassOf< cl...	WorldSettingsClass
FSoftClassPath	WorldSettingsClassName	Sets the class to use for WorldSettings, which can be overridden to store game-specific information on map/world.
TSharedPtr< cla...	XRSystem	Reference to the VR/AR/MR tracking system that is attached, if any

Constructors

	Name	Description
	UEngine ( const FObjectInitializer& ObjectIn... )

Functions

	Name	Description
void	AddEngineStat ( const FName& InCommandName, const FName& InCategoryName, const FText& InDescriptionString, FEngineStatRender InRenderFunc, FEngineStatToggle InToggleFunc, const bool bInIsRHS )	Allows external systems to add a new simple engine stat function.
void	AddNewPendingStreamingLevel ( UWorld* InWorld, FName PackageName, bool bNewShouldBeLoaded, bool bNewShouldBeVisible, int32 LODIndex )
void	AddOnScreenDebugMessage ( int32 Key, float TimeToDisplay, FColor DisplayColor, const FString& DebugMessage, bool bNewerOnTop, const FVector2D& TextScale )	Add a FString to the On-screen debug message system.
void	AddOnScreenDebugMessage ( uint64 Key, float TimeToDisplay, FColor DisplayColor, const FString& DebugMessage, bool bNewerOnTop, const FVector2D& TextScale )	Add a FString to the On-screen debug message system.
void	AddPerformanceDataConsumer ( TSharedPtr< IPerformanceDataConsume... )	Register a performance data consumer with the engine; it will be passed performance information each frame
void	AddReferencedObjects ( UObject* InThis, FReferenceCollector& Collector )
void	AddTextureStreamingSlaveLoc ( FVector InLoc, float BoostFactor, bool bOverrideLocation, float OverrideDuration )	Adds a world location as a secondary view location for purposes of texture streaming.
bool	AllowSelectTranslucent()
bool	AreEditorAnalyticsEnabled()
int32	BeginTransaction ( const TCHAR* TransactionContex..., const FText& Description, UObject* PrimaryObject )
void	BlockTillLevelStreamingCompleted ( UWorld* InWorld )	Updates level streaming state using active game players view and blocks until all sub-levels are loaded/ visible/ hidden so further calls to UpdateLevelStreaming won't do any work unless state changes.
void	BroadcastActorsMoved ( TArray< AActor* >& Actors )	Called when actors have been translated, rotated, or scaled by the editor
void	BroadcastEditorClose()	Called after UEditorEngine::Tick has been called (or UGameEngine::Tick in standalone)
void	BroadcastLevelActorAdded ( AActor* InActor )	Called by internal engine systems after a level actor has been added
void	BroadcastLevelActorAttached ( AActor* InActor, const AActor* InParent )	Called by internal engine systems after a level actor has been attached
void	BroadcastLevelActorDeleted ( AActor* InActor )	Called by internal engine systems after level actors have changed to notify other subsystems
void	BroadcastLevelActorDetached ( AActor* InActor, const AActor* InParent )	Called by internal engine systems after a level actor has been detached
void	BroadcastLevelActorFolderChanged ( const AActor* InActor, FName OldPath )	Called by internal engine systems after a level actor's folder has been changed
void	BroadcastLevelActorListChanged()	Called by internal engine systems after a world's actor list changes in a way not specifiable through other LevelActor__Events to notify other subsystems
void	BroadcastLevelActorOuterChanged ( AActor* InActor, UObject* InOldOuter )	Called by internal engine systems after level actors have changed outer
void	BroadcastLevelActorRequestRename ( const AActor* InActor )	Called by internal engine systems after a level actor has been requested to be renamed
void	BroadcastLevelComponentRequestRename ( const UActorComponent* InCompo... )	Called by internal engine systems after a level actor has been requested to be renamed
void	BroadcastNetworkDDosSEscalation ( UWorld* World, UNetDriver* NetDriver, FString SeverityCategory )	Called by internal engine systems after network burst or DDoS is detected
void	BroadcastNetworkFailure ( UWorld* World, UNetDriver* NetDriver, ENetworkFailure::Type FailureType, const FString& ErrorString )	Called by internal engine systems after a network failure has occurred
void	BroadcastNetworkLagStateChanged ( UWorld* World, UNetDriver* NetDriver, ENetworkLagState::Type LagType )	Called by internal engine systems after network lag has been detected
void	BroadcastOnActorMoved ( AActor* Actor )	Called by internal engine systems after an actor has been moved to notify other subsystems
void	BroadcastOnActorMoving ( AActor* Actor )	Called by internal engine systems when an actor is being moved to notify other subsystems
void	BroadcastOnComponentTransformChanged ( USceneComponent* InComponent, ETeleportType InTeleport )	Called by SceneComponent PropagateTransformUpdate to nofify of any component transform change
void	BroadcastPostEditorTick ( float DeltaSeconds )	Called after UEditorEngine::Tick has been called (or UGameEngine::Tick in standalone)
void	BroadcastTravelFailure ( UWorld* InWorld, ETravelFailure::Type FailureType, const FString& ErrorString )	Called by internal engine systems after a travel failure has occurred
EBrowseRetur...	Browse ( FWorldContext& WorldContext, FURL URL, FString& Error )	Browse to a specified URL, relative to the current one.
void	BrowseToDefaultMap ( FWorldContext& WorldContext )
void	CancelAllPending()	Cancel pending level.
void	CancelPending ( UNetDriver* PendingNetGameDriv... )
void	CancelPending ( UWorld* InWorld, UPendingNetGame* NewPendingNet... )
void	CancelPending ( FWorldContext& WorldContext )
void	CancelPendingMapChange ( UWorld* InWorld )	Cancels pending map change.
void	CancelPendingMapChange ( FWorldContext& Context )	Cancels pending map change.
void	CancelTransaction ( int32 Index )
void	ChangeDynamicResolutionStateAtNextFrame ( TSharedPtr< class IDynamicResolutio... )	Override dynamic resolution state for next frame.
void	CleanupGameViewport()	Clean up the GameViewport
void	CleanupPackagesToFullyLoad ( FWorldContext& Context, EFullyLoadPackageType FullyLoadType, const FString& Tag )	Removes the PerMapPackages from the RootSet
void	ClearDebugDisplayProperties()	Clear out the debug properties array that is storing values to show on the screen
void	ClearOnScreenDebugMessages()	Clear any existing debug messages
bool	CommitMapChange ( FWorldContext& Context )	Finalizes the pending map change that was being kicked off by PrepareMapChange.
bool	CommitMapChange ( UWorld* InWorld )
void	ConditionalCollectGarbage()	Collect garbage once per frame driven by World ticks
void	ConditionalCommitMapChange ( UWorld* InWorld )
void	ConditionalCommitMapChange ( FWorldContext& WorldContext )	Commit map change if requested and map change is pending. Called every frame.
void	CopyPropertiesForUnrelatedObjects ( UObject* OldObject, UObject* NewObject, FCopyPropertiesForUnrelatedObjectsP... )
double	CorrectNegativeTimeDelta ( double DeltaRealTime )	Allows games to correct the negative delta
bool	CreateNamedNetDriver ( UPendingNetGame* PendingNetGam..., FName NetDriverName, FName NetDriverDefinition )	Creates a UNetDriver and associates a name with it.
bool	CreateNamedNetDriver ( UWorld* InWorld, FName NetDriverName, FName NetDriverDefinition )	Creates a UNetDriver and associates a name with it.
UNetDriver &...	CreateNetDriver ( UWorld* InWorld, FName NetDriverDefinition )	Creates a UNetDriver with an engine assigned name
FWorldContex...	CreateNewWorldContext ( EWorldType::Type WorldType )
UWorld *	CreatePIEWorldByDuplication ( FWorldContext& Context, UWorld* InWorld, FString& PlayWorldMapName )	This should only ever be called for a EditorEngine.
void	CreateStartupAnalyticsAttributes ( TArray< struct FAnalyticsEventAttri... )
void	DelayGarbageCollection()	Requests a one frame delay of Garbage Collection
void	DestroyNamedNetDriver ( UPendingNetGame* PendingNetGam..., FName NetDriverName )	Destroys a UNetDriver based on its name.
void	DestroyNamedNetDriver ( UWorld* InWorld, FName NetDriverName )	Destroys a UNetDriver based on its name.
void	DestroyWorldContext ( UWorld* InWorld )
float	DrawOnscreenDebugMessages ( UWorld* World, FViewport* Viewport, FCanvas* Canvas, UCanvas* CanvasObject, float MessageX, float MessageY )	UE_BUILD_SHIPPING.
void	EmitDynamicResolutionEvent ( EDynamicResolutionStateEvent Event )	Emit an event for dynamic resolution if not already done.
void	EnableScreenSaver ( bool bEnable )	Enables or disables the ScreenSaver (PC only)
int32	EndTransaction()
void	ExecEngineStat ( UWorld* World, FCommonViewportClient* Viewpor..., const TCHAR* InName )	Wrapper for firing a simple stat exec.
bool	Experimental_ShouldPreDuplicateMap ( const FName MapName )	If this function returns true, the DynamicSourceLevels collection will be duplicated for the given map.
ULocalPlayer...	FindFirstLocalPlayerFromControllerId ( int32 ControllerId )	Returns the first ULocalPlayer that matches the given ControllerId.
UNetDriver &...	FindNamedNetDriver ( const UWorld* InWorld, FName NetDriverName )	Finds a UNetDriver based on its name.
UNetDriver &...	FindNamedNetDriver ( const UPendingNetGame* InPendi..., FName NetDriverName )	Finds a UNetDriver based on its name.
void	FocusNextPIEWorld ( UWorld* CurrentPieWorld, bool previous )
void	ForceGarbageCollection ( bool bFullPurge )	Updates the timer between garbage collection such that at the next opportunity garbage collection will be run.
UGameViewpor...	GameViewportForWorld ( const UWorld* InWorld )
FAudioDevice...	GetActiveAudioDevice()
UFont *	GetAdditionalFont ( int32 AdditionalFontIndex )	Gets the specified additional font. Returns the specified additional font.
void	GetAllLocalPlayerControllers ( TArray< APlayerController* >&... )	Gets all local players associated with the engine.
FAudioDevice...	GetAudioDeviceManager()
void	GetAverageUnitTimes ( TArray< float >& AverageTimes )	Returns the average game/render/gpu/total time since this function was last called
UWorld *	GetCurrentPlayWorld ( UWorld* PossiblePlayWorld )	Tries to find the currently active primary Game or Play in Editor world, returning null if it is ambiguous.
UEngineCusto...	GetCustomTimeStep()	Get the custom time step that control the Engine Framerate/Timestep
ULocalPlayer...	GetDebugLocalPlayer()	Returns the first ULocalPlayer that should be used for debug purposes.
ERHIFeatureL...	GetDefaultWorldFeatureLevel()	The feature used to create new worlds, by default.
float	GetDisplayGamma()	Returns the current display gamma value
void	GetDynamicResolutionCurrentStateInfos ( FDynamicResolutionStateInfos& OutI... )	Queries informations about the current state dynamic resolution.
IDynamicReso...	GetDynamicResolutionState()	Get's global dynamic resolution state
bool	GetDynamicResolutionUserSetting()	Get the user setting for dynamic resolution.
TSubsystemCl...	GetEngineSubsystem()	Get an Engine Subsystem of specified type
const TArray...	GetEngineSubsystemArray()	Get all Engine Subsystem of specified type, this is only necessary for interfaces that can have multiple implementations instanced at a time.
UEngineSubsy...	GetEngineSubsystemBase ( TSubclassOf< UEngineSubsystem > Sub... )	Get an Engine Subsystem of specified type
ULocalPlayer...	GetFirstGamePlayer ( UWorld* InWorld )	Return the first ULocalPlayer in the GamePlayers array.
ULocalPlayer...	GetFirstGamePlayer ( const UGameViewportClient* InV... )	Return the first ULocalPlayer in the GamePlayers array.
ULocalPlayer...	GetFirstGamePlayer ( UPendingNetGame* PendingNetGam... )	Return the first ULocalPlayer in the GamePlayers array.
APlayerContr...	GetFirstLocalPlayerController ( const UWorld* InWorld )	Find a Local Player Controller, which may not exist at all if this is a server.
FColor	GetFrameTimeDisplayColor ( float FrameTimeMS )	Returns the display color for a given frame time (based on t.TargetFrameTimeThreshold and t.UnacceptableFrameTimeThreshold)
ULocalPlayer...	GetGamePlayer ( UWorld* InWorld, int32 InPlayer )	Return the ULocalPlayer with the given index.
ULocalPlayer...	GetGamePlayer ( const UGameViewportClient* InV..., int32 InPlayer )	Return the ULocalPlayer with the given index.
const TArray...	GetGamePlayers ( const UGameViewportClient* Vie... )
const TArray...	GetGamePlayers ( UWorld* World )
UGameUserSet...	GetGameUserSettings()	Returns the global instance of the game user settings class.
const UGameU...	GetGameUserSettings()	Returns the global instance of the game user settings class.
TSharedPtr< ...	GetGameViewportWidget()	Returns the GameViewport widget
int32	GetGlobalFunctionCallspace ( UFunction* Function, UObject* FunctionTarget, FFrame* Stack )	Called from GetFunctionCallspace on specific objects to check for authority/cosmetic function tags using global state
const FLinea...	GetHoveredMaterialColor()
UFont *	GetLargeFont()	Gets the engine's default large font. Returns the engine's default large font
ULocalPlayer...	GetLocalPlayerFromControllerId ( UWorld* InWorld, const int32 ControllerId )	Retrieves the LocalPlayer for the player which has the ControllerId specified
ULocalPlayer...	GetLocalPlayerFromControllerId ( const UGameViewportClient* InV..., const int32 ControllerId )	Retrieves the LocalPlayer for the player which has the ControllerId specified
TArray< clas...	GetLocalPlayerIterator ( UWorld* World )	Return a reference to the GamePlayers array.
TArray< clas...	GetLocalPlayerIterator ( const UGameViewportClient* Vie... )	Return a reference to the GamePlayers array.
FAudioDevice...	GetMainAudioDevice()
uint32	GetMainAudioDeviceID()
FAudioDevice...	GetMainAudioDeviceRaw()
bool	GetMapBuildCancelled()	Returns whether or not the map build in progressed was canceled by the user.
FString	GetMapChangeFailureDescription ( FWorldContext& Context )	Returns the failure description in case of a failed map change request.
FString	GetMapChangeFailureDescription ( UWorld* InWorld )
float	GetMaxFPS()	Get max fps.
float	GetMaxTickRate ( float DeltaTime, bool bAllowFrameRateSmoothing )	Get tick rate limiter. Get tick rate limitor.
UFont *	GetMediumFont()	Gets the engine's default medium font.
ENetMode	GetNetMode ( const UWorld* World )	Virtual ENetMode GetNetMode(FName NetDriverName = NAME_GameNetDriver) const;
UGameViewpor...	GetNextPIEViewport ( UGameViewportClient* CurrentVi... )
int32	GetNumGamePlayers ( const UGameViewportClient* InV... )	Return the number of entries in the GamePlayers array
int32	GetNumGamePlayers ( UWorld* InWorld )	Return the number of entries in the GamePlayers array
FPostRenderD...	GetPostRenderDelegate()
FPreRenderDe...	GetPreRenderDelegate()
bool	GetPreviewPlatformName ( FName& PlatformGroupName, FName& VanillaPlatformName )	Return the platform group name and vanilla platform name the current preview platform, or false if there is no preview platform.
bool	GetPropertyColorationColor ( UObject* Object, FColor& OutColor )	Computes a color to use for property coloration for the given object.
const FLinea...	GetSelectedMaterialColor()	Get the color to use for object selection
const FLinea...	GetSelectionOutlineColor()
TSharedRef< ...	GetServiceLocator()	Get a locator for Portal services.
UFont *	GetSmallFont()	Gets the engine's default small font
int32	GetSpriteCategoryIndex ( const FName& InSpriteCategory )	Get the index of the provided sprite category
bool	GetStatValueColoration ( const FString& StatName, float Value, FColor& OutColor )	Uses StatColorMappings to find a color for this stat's value.
const FLinea...	GetSubduedSelectionOutlineColor()
UFont *	GetSubtitleFont()	Gets the engine's default subtitle font. Returns the engine's default subtitle font
float	GetTimeBetweenGarbageCollectionPasses()	Returns the current desired time between garbage collection passes (not the time remaining)
UTimecodePro...	GetTimecodeProvider()	Get the TimecodeProvider that control the Engine's Timecode.
UFont *	GetTinyFont()	Gets the engine's default tiny font.
FWorldContex...	GetWorldContextFromGameViewport ( const UGameViewportClient* InV... )
const FWorld...	GetWorldContextFromGameViewport ( const UGameViewportClient* InV... )
FWorldContex...	GetWorldContextFromGameViewportChecked ( const UGameViewportClient* InV... )
const FWorld...	GetWorldContextFromGameViewportChecked ( const UGameViewportClient* InV... )
const FWorld...	GetWorldContextFromHandle ( const FName WorldContextHandle )
FWorldContex...	GetWorldContextFromHandle ( const FName WorldContextHandle )
const FWorld...	GetWorldContextFromHandleChecked ( const FName WorldContextHandle )
FWorldContex...	GetWorldContextFromHandleChecked ( const FName WorldContextHandle )
FWorldContex...	GetWorldContextFromPendingNetGame ( const UPendingNetGame* InPendi... )
const FWorld...	GetWorldContextFromPendingNetGame ( const UPendingNetGame* InPendi... )
const FWorld...	GetWorldContextFromPendingNetGameChecked ( const UPendingNetGame* InPendi... )
FWorldContex...	GetWorldContextFromPendingNetGameChecked ( const UPendingNetGame* InPendi... )
const FWorld...	GetWorldContextFromPendingNetGameNetDriver ( const UNetDriver* InPendingNet... )
FWorldContex...	GetWorldContextFromPendingNetGameNetDriver ( const UNetDriver* InPendingNet... )
FWorldContex...	GetWorldContextFromPendingNetGameNetDriverChecked ( const UNetDriver* InPendingNet... )
const FWorld...	GetWorldContextFromPendingNetGameNetDriverChecked ( const UNetDriver* InPendingNet... )
const FWorld...	GetWorldContextFromPIEInstance ( const int32 PIEInstance )
FWorldContex...	GetWorldContextFromPIEInstance ( const int32 PIEInstance )
FWorldContex...	GetWorldContextFromPIEInstanceChecked ( const int32 PIEInstance )
const FWorld...	GetWorldContextFromPIEInstanceChecked ( const int32 PIEInstance )
FWorldContex...	GetWorldContextFromWorld ( const UWorld* InWorld )
const FWorld...	GetWorldContextFromWorld ( const UWorld* InWorld )
FWorldContex...	GetWorldContextFromWorldChecked ( const UWorld* InWorld )
const FWorld...	GetWorldContextFromWorldChecked ( const UWorld* InWorld )
const TIndir...	GetWorldContexts()
UWorld *	GetWorldFromContextObject ( const UObject* Object, EGetWorldErrorMode ErrorMode )	Obtain a world object pointer from an object with has a world context.
UWorld *	GetWorldFromContextObjectChecked ( const UObject* Object )	Obtain a world object pointer from an object with has a world context.
bool	HandleAnimSeqStatsCommand ( const TCHAR* Cmd, FOutputDevice& Ar )
void	HandleBrowseToDefaultMapFailure ( FWorldContext& Context, const FString& TextURL, const FString& Error )	Attempts to gracefully handle a failure to travel to the default map.
bool	HandleCeCommand ( UWorld* InWorld, const TCHAR* Cmd, FOutputDevice& Ar )
bool	HandleConfigHashCommand ( const TCHAR* Cmd, FOutputDevice& Ar )
bool	HandleConfigMemCommand ( const TCHAR* Cmd, FOutputDevice& Ar )
bool	HandleContentComparisonCommand ( const TCHAR* Cmd, FOutputDevice& Ar )
bool	HandleCountDisabledParticleItemsCommand ( const TCHAR* Cmd, FOutputDevice& Ar )
bool	HandleCrackURLCommand ( const TCHAR* Cmd, FOutputDevice& Ar )
bool	HandleDebugCommand ( const TCHAR* Cmd, FOutputDevice& Ar )
bool	HandleDeferCommand ( const TCHAR* Cmd, FOutputDevice& Ar )
bool	HandleDirCommand ( const TCHAR* Cmd, FOutputDevice& Ar )
bool	HandleDisableAllScreenMessagesCommand ( const TCHAR* Cmd, FOutputDevice& Ar )
void	HandleDisconnect ( UWorld* InWorld, UNetDriver* NetDriver )	The proper way to disconnect a given World and NetDriver.
bool	HandleDisconnectCommand ( const TCHAR* Cmd, FOutputDevice& Ar, UWorld* InWorld )
bool	HandleDumpAllocatorStats ( const TCHAR* Cmd, FOutputDevice& Ar )
bool	HandleDumpAvailableResolutionsCommand ( const TCHAR* Cmd, FOutputDevice& Ar )
bool	HandleDumpConsoleCommandsCommand ( const TCHAR* Cmd, FOutputDevice& Ar, UWorld* InWorld )	Compile in Debug, Development, and Test.
bool	HandleDumpLevelScriptActorsCommand ( UWorld* InWorld, const TCHAR* Cmd, FOutputDevice& Ar )
bool	HandleDumpMaterialStatsCommand ( const TCHAR* Cmd, FOutputDevice& Ar )
bool	HandleDumpParticleCountsCommand ( const TCHAR* Cmd, FOutputDevice& Ar )
bool	HandleDumpShaderStatsCommand ( const TCHAR* Cmd, FOutputDevice& Ar )
bool	HandleDumpTicksCommand ( UWorld* InWorld, const TCHAR* Cmd, FOutputDevice& Ar )
bool	HandleEnableAllScreenMessagesCommand ( const TCHAR* Cmd, FOutputDevice& Ar )
bool	HandleFlushLogCommand ( const TCHAR* Cmd, FOutputDevice& Ar )	Exec command handlers
bool	HandleFreezeAllCommand ( const TCHAR* Cmd, FOutputDevice& Ar, UWorld* InWorld )
bool	HandleFreezeRenderingCommand ( const TCHAR* Cmd, FOutputDevice& Ar, UWorld* InWorld )
bool	HandleFreezeStreamingCommand ( const TCHAR* Cmd, FOutputDevice& Ar, UWorld* InWorld )
bool	HandleGameVerCommand ( const TCHAR* Cmd, FOutputDevice& Ar )
bool	HandleGammaCommand ( const TCHAR* Cmd, FOutputDevice& Ar )
bool	HandleGetIniCommand ( const TCHAR* Cmd, FOutputDevice& Ar )
bool	HandleHeapCheckCommand ( const TCHAR* Cmd, FOutputDevice& Ar )
bool	HandleHotReloadCommand ( const TCHAR* Cmd, FOutputDevice& Ar )	Compile in Debug or Development.
bool	HandleKismetEventCommand ( UWorld* InWorld, const TCHAR* Cmd, FOutputDevice& Ar )
bool	HandleListAnimsCommand ( const TCHAR* Cmd, FOutputDevice& Ar )
bool	HandleListLoadedPackagesCommand ( const TCHAR* Cmd, FOutputDevice& Ar )
bool	HandleListParticleSystemsCommand ( const TCHAR* Cmd, FOutputDevice& Ar )
bool	HandleListSkeletalMeshesCommand ( const TCHAR* Cmd, FOutputDevice& Ar )
bool	HandleListSpawnedActorsCommand ( const TCHAR* Cmd, FOutputDevice& Ar, UWorld* InWorld )
bool	HandleListStaticMeshesCommand ( const TCHAR* Cmd, FOutputDevice& Ar )
bool	HandleListTexturesCommand ( const TCHAR* Cmd, FOutputDevice& Ar )
bool	HandleLogoutStatLevelsCommand ( const TCHAR* Cmd, FOutputDevice& Ar, UWorld* InWorld )
bool	HandleMemCommand ( const TCHAR* Cmd, FOutputDevice& Ar )
bool	HandleMemReportCommand ( const TCHAR* Cmd, FOutputDevice& Ar, UWorld* InWorld )
bool	HandleMemReportDeferredCommand ( const TCHAR* Cmd, FOutputDevice& Ar, UWorld* InWorld )
bool	HandleMergeMeshCommand ( const TCHAR* Cmd, FOutputDevice& Ar, UWorld* InWorld )
void	HandleNetworkFailure ( UWorld* World, UNetDriver* NetDriver, ENetworkFailure::Type FailureType, const FString& ErrorString )	Notification of network error messages, allows the engine to handle the failure
void	HandleNetworkLagStateChanged ( UWorld* World, UNetDriver* NetDriver, ENetworkLagState::Type LagType )	Notification of network lag state change messages.
bool	HandleObjCommand ( const TCHAR* Cmd, FOutputDevice& Ar )
bool	HandleOpenCommand ( const TCHAR* Cmd, FOutputDevice& Ar, UWorld* InWorld )
bool	HandleParticleMeshUsageCommand ( const TCHAR* Cmd, FOutputDevice& Ar )
bool	HandleProfileCommand ( const TCHAR* Cmd, FOutputDevice& Ar )
bool	HandleProfileGPUCommand ( const TCHAR* Cmd, FOutputDevice& Ar )	Only compile in when STATS is set.
bool	HandleProfileGPUHitchesCommand ( const TCHAR* Cmd, FOutputDevice& Ar )
bool	HandleRecompileGlobalShadersCommand ( const TCHAR* Cmd, FOutputDevice& Ar )
bool	HandleRecompileShadersCommand ( const TCHAR* Cmd, FOutputDevice& Ar )
bool	HandleReconnectCommand ( const TCHAR* Cmd, FOutputDevice& Ar, UWorld* InWorld )
bool	HandleRemoteTextureStatsCommand ( const TCHAR* Cmd, FOutputDevice& Ar )
bool	HandleShaderComplexityCommand ( const TCHAR* Cmd, FOutputDevice& Ar )
bool	HandleShowLogCommand ( const TCHAR* Cmd, FOutputDevice& Ar )
bool	HandleStartFPSChartCommand ( const TCHAR* Cmd, FOutputDevice& Ar )
bool	HandleStatCommand ( UWorld* World, FCommonViewportClient* Viewpor..., const TCHAR* Cmd, FOutputDevice& Ar )
bool	HandleStopFPSChartCommand ( const TCHAR* Cmd, FOutputDevice& Ar, UWorld* InWorld )
bool	HandleStopMovieCaptureCommand ( const TCHAR* Cmd, FOutputDevice& Ar )
bool	HandleStreamMapCommand ( const TCHAR* Cmd, FOutputDevice& Ar, UWorld* InWorld )
bool	HandleTestslateGameUICommand ( const TCHAR* Cmd, FOutputDevice& Ar )
bool	HandleToggleAllScreenMessagesCommand ( const TCHAR* Cmd, FOutputDevice& Ar )
bool	HandleToggleAsyncComputeCommand ( const TCHAR* Cmd, FOutputDevice& Ar )
bool	HandleTogglegtPsysLODCommand ( const TCHAR* Cmd, FOutputDevice& Ar )
bool	HandleToggleOnscreenDebugMessageDisplayCommand ( const TCHAR* Cmd, FOutputDevice& Ar )
bool	HandleToggleOnscreenDebugMessageSystemCommand ( const TCHAR* Cmd, FOutputDevice& Ar )
bool	HandleToggleRenderingThreadCommand ( const TCHAR* Cmd, FOutputDevice& Ar )
bool	HandleTrackParticleRenderingStatsCommand ( const TCHAR* Cmd, FOutputDevice& Ar )
bool	HandleTravelCommand ( const TCHAR* Cmd, FOutputDevice& Ar, UWorld* InWorld )
void	HandleTravelFailure ( UWorld* InWorld, ETravelFailure::Type FailureType, const FString& ErrorString )	Notification of server travel error messages, generally network connection related (package verification, client server handshaking, etc) allows the engine to handle the failure
bool	HandleViewnamesCommand ( const TCHAR* Cmd, FOutputDevice& Ar )
void	Init ( IEngineLoop* InEngineLoop )	Initialize the game engine.
void	InitializeAudioDeviceManager()	Initialize the audio device manager
bool	InitializeEyeTrackingDevice()	Detects and initializes any attached eye-tracking devices
bool	InitializeHMDDevice()	Detects and initializes any attached HMD devices
void	InitializeObjectReferences()	Loads all Engine object references from their corresponding config entries.
void	InitializePortalServices()	Initialize Portal services.
void	InitializeRunningAverageDeltaTime()	Initializes the running average delta to some good initial framerate.
bool	IsAllowedFramerateSmoothing()	Whether we're allowed to do frame rate smoothing
bool	IsAutosaving()
bool	IsEditor()
bool	IsEngineStat ( const FString& InName )	Check to see if the specified stat name is a simple stat.
bool	IsInitialized()
bool	IsPreparingMapChange ( FWorldContext& Context )	Returns whether we are currently preparing for a map change or not.
bool	IsPreparingMapChange ( UWorld* InWorld )
bool	IsReadyForMapChange ( UWorld* InWorld )
bool	IsReadyForMapChange ( FWorldContext& Context )	Returns whether the prepared map change is ready for commit having called.
bool	IsSettingUpPlayWorld()	Mostly done to check if PIE is being set up, go GWorld is going to change, and it's not really the_G_World
bool	IsSplitScreen ( UWorld* InWorld )
bool	IsStereoscopic3D ( FViewport* InViewport )
bool	IsVanillaProduct()
bool	IsWorldDuplicate ( const UWorld*const InWorld )	Helper function that returns true if InWorld is the outer of a level in a collection of type DynamicDuplicatedLevels.
FURL &	LastURLFromWorld ( UWorld* World )
bool	LoadMap ( FWorldContext& WorldContext, FURL URL, UPendingNetGame* Pending, FString& Error )
void	LoadMapRedrawViewports()	Called to allow overloading by child engines
void	LoadPackagesFully ( UWorld* InWorld, EFullyLoadPackageType FullyLoadType, const FString& Tag )	Loads the PerMapPackages for the given map, and adds them to the RootSet
void	LogPerformanceCapture ( UWorld* World, const FString& MapName, const FString& MatineeName, float EventTime )	Logs performance capture for use in automation analytics
bool	MakeSureMapNameIsValid ( FString& InOutMapName )	Makes sure map name is a long package name.
void	MovePendingLevel ( FWorldContext& Context )
bool	NetworkRemapPath ( UNetConnection* Connection, FString& Str, bool bReading )
bool	NetworkRemapPath ( UPendingNetGame* PendingNetGam..., FString& Str, bool bReading )
void	NotifyToolsOfObjectReplacement ( const TMap< UObject*, UObject ... )
FOnActorMove...	OnActorMoved()
FOnActorMovi...	OnActorMoving()
FOnActorsMov...	OnActorsMoved()
FOnComponent...	OnComponentTransformChanged()
FSimpleMulti...	OnCustomTimeStepChanged()	Return custom time step changed event.
FEditorClose...	OnEditorClose()
FLevelActorA...	OnLevelActorAdded()
FLevelActorA...	OnLevelActorAttached()
FLevelActorD...	OnLevelActorDeleted()
FLevelActorD...	OnLevelActorDetached()
FLevelActorF...	OnLevelActorFolderChanged()
FLevelActorL...	OnLevelActorListChanged()
FLevelActorO...	OnLevelActorOuterChanged()
FLevelActorR...	OnLevelActorRequestRename()
FLevelCompon...	OnLevelComponentRequestRename()
void	OnLostFocusPause ( bool EnablePause )	Pauses / un-pauses the game-play when focus of the game's window gets lost / gained.
bool	OnlyLoadEditorVisibleLevelsInPIE()
FOnNetworkDD...	OnNetworkDDoSEscalation()	Event triggered when network burst or DDoS is detected
FOnNetworkFa...	OnNetworkFailure()	Event triggered after a network failure of any kind has occurred
FOnNetworkLa...	OnNetworkLagStateChanged()	Event triggered after network lag is being experienced or lag has ended
FPostEditorT...	OnPostEditorTick()
bool	OnScreenDebugMessageExists ( uint64 Key )	Retrieve the message for the given key
FSimpleMulti...	OnTimecodeProviderChanged()	Return timecode provider changed event.
FOnTravelFai...	OnTravelFailure()	Event triggered after a server travel failure of any kind has occurred
FWorldAddedE...	OnWorldAdded()	Return the world added event.
FWorldContex...	OnWorldContextDestroyed()	Return the world context destroyed event.
FWorldDestro...	OnWorldDestroyed()	Return the world destroyed event.
void	OverrideSelectedMaterialColor ( const FLinearColor& OverrideColor )	Sets an override color to use instead of the user setting
void	ParseCommandline()	Called at startup, in the middle of FEngineLoop::Init.
void	PauseDynamicResolution()	Pause dynamic resolution for this frame.
UPendingNetG...	PendingNetGameFromWorld ( UWorld* InWorld )
void	PerformanceCapture ( UWorld* World, const FString& MapName, const FString& MatineeName, float EventTime )	Capture screenshots and performance metrics
bool	PerformError ( const TCHAR* Cmd, FOutputDevice& Out )	Requests that the engine intentionally performs an invalid operation.
void	PerformGarbageCollectionAndCleanupActors()	Interface to allow WorldSettings to request immediate garbage collection
void	PreExit()	Called at shutdown, just before the exit purge.
bool	PreferToStreamLevelsInPIE()
void	PreGarbageCollect()
bool	PrepareMapChange ( UWorld* InWorld, const TArray< FName >& LevelNames )
bool	PrepareMapChange ( FWorldContext& WorldContext, const TArray< FName >& LevelNames )	Prepares the engine for a map change by pre-loading level packages in the background.
void	ProcessToggleFreezeCommand ( UWorld* InWorld )	Handles freezing/unfreezing of rendering
void	ProcessToggleFreezeStreamingCommand ( UWorld* InWorld )	Handles frezing/unfreezing of streaming
void	RecordHMDAnalytics()	Record EngineAnalytics information for attached HMD devices.
void	RedrawViewports ( bool bShouldPresent )
void	RegisterBeginStreamingPauseRenderingDelegate ( FBeginStreamingPauseDelegate* ... )	Delegate handling when streaming pause begins.
void	RegisterEndStreamingPauseRenderingDelegate ( FEndStreamingPauseDelegate* In... )	Delegate handling when streaming pause ends.
void	ReinitializeCustomTimeStep()	Causes the current custom time step to be shut down and then reinitialized.
void	ReinitializeTimecodeProvider()	Causes the current timecode provider to be shut down and then reinitialized.
void	ReleaseAudioDeviceManager()
void	RemapGamepadControllerIdForPIE ( UGameViewportClient* InGameVie..., int32& ControllerId )
void	RemoveEngineStat ( const FName& InCommandName )
void	RemoveOnScreenDebugMessage ( uint64 Key )	Remove the message for the given key.
void	RemovePerformanceDataConsumer ( TSharedPtr< IPerformanceDataConsume... )	Remove a previously registered performance data consumer
void	RenderEngineStats ( UWorld* World, FViewport* Viewport, FCanvas* Canvas, int32 LHSX, int32& InOutLHSY, int32 RHSX, int32& InOutRHSY, const FVector* ViewLocation, const FRotator* ViewRotation )	Function to render all the simple stats
void	ResetPIEAudioSetting ( UWorld* CurrentPieWorld )
void	RestoreSelectedMaterialColor()	Restores the selected material color back to the user setting
void	ResumeDynamicResolution()	Resume dynamic resolution for this frame.
FSeamlessTra...	SeamlessTravelHandlerForWorld ( UWorld* World )
void	SetAverageUnitTimes ( float FrameTime, float RenderThreadTime, float GameThreadTime, float GPUFrameTime, float RHITFrameTime )	Updates the values used to calculate the average game/render/gpu/total time
void	SetClientTravel ( UPendingNetGame* PendingNetGam..., const TCHAR* NextURL, ETravelType InTravelType )
void	SetClientTravel ( UWorld* InWorld, const TCHAR* NextURL, ETravelType InTravelType )
void	SetClientTravelFromPendingGameNetDriver ( UNetDriver* PendingGameNetDriv..., const TCHAR* NextURL, ETravelType InTravelType )
bool	SetCustomTimeStep ( UEngineCustomTimeStep* InCusto... )	Set the custom time step that will control the Engine Framerate/Timestep.
void	SetDynamicResolutionUserSetting ( bool Enable )	Set the user setting for dynamic resolution.
void	SetEngineStat ( UWorld* World, FCommonViewportClient* Viewpor..., const FString& InName, const bool bShow )	Set the state of the specified stat.
void	SetEngineStats ( UWorld* World, FCommonViewportClient* Viewpor..., const TArray< FString >& InNames, const bool bShow )	Set the state of the specified stats ( array processed in reverse order when !bShow).
void	SetFlashIndicatorLatencyMarker ( uint64 FrameNumber )
void	SetInputSampleLatencyMarker ( uint64 FrameNumber )
void	SetIsVanillaProduct ( bool bInIsVanillaProduct )
void	SetMapBuildCancelled ( bool InCancelled )	Sets the flag that states whether or not the map build was canceled.
void	SetMaxFPS ( const float MaxFPS )	Set max fps. Overrides console variable.
void	SetPresentLatencyMarkerEnd ( uint64 FrameNumber )
void	SetPresentLatencyMarkerStart ( uint64 FrameNumber )
void	SetRenderSubmitLatencyMarkerEnd ( uint64 FrameNumber )
void	SetRenderSubmitLatencyMarkerStart ( uint64 FrameNumber )
void	SetSelectedMaterialColor ( const FLinearColor& InSelectedMate... )	Sets the selected material color.
void	SetSelectionOutlineColor ( const FLinearColor& InSelectionOut... )
void	SetShouldCommitPendingMapChange ( UWorld* InWorld, bool NewShouldCommitPendingMapChang... )
void	SetSimulationLatencyMarkerEnd ( uint64 FrameNumber )
void	SetSimulationLatencyMarkerStart ( uint64 FrameNumber )
void	SetSubduedSelectionOutlineColor ( const FLinearColor& InSubduedSelec... )
bool	SetTimecodeProvider ( UTimecodeProvider* InTimecodeP... )	Set the timecode provider that will control the Engine's timecode.
void	SetTimeUntilNextGarbageCollection ( float MinTimeUntilNextPass )	Updates the timer (as a one-off) that is used to trigger garbage collection; this should only be used for things like performance tests, using it recklessly can dramatically increase memory usage and cost of the eventual GC.
bool	ShouldAbsorbAuthorityOnlyEvent()	Returns true if the global context is client-only and authority only events should always be ignored.
bool	ShouldAbsorbCosmeticOnlyEvent()	Returns true if the global context is dedicated server and cosmetic only events should always be ignored.
bool	ShouldCommitPendingMapChange ( const UWorld* InWorld )
bool	ShouldDoAsyncEndOfFrameTasks()
bool	ShouldDrawBrushWireframe ( AActor* InActor )	Allows the editor to accept or reject the drawing of wire frame brush shapes based on mode and tool.
bool	ShouldShutdownWorldNetDriver()	Returns true if BROWSE should shuts down the current network driver.
bool	ShouldThrottleCPUUsage()
void	ShutdownAllNetDrivers()
void	ShutdownHMD()
void	ShutdownWorldNetDriver ( UWorld* )	Shutdown any relevant net drivers
void	SpawnServerActors ( UWorld* World )	Spawns all of the registered server actors
void	Start()	Start the game, separate from the initialize call to allow for post initialize configuration before the game starts.
void	StartFPSChart ( const FString& Label, bool bRecordPerFrameTimes )	Starts the FPS chart data capture (if another run is already active then this command is ignored except to change the active label).
void	StopFPSChart ( const FString& MapName )	Stops the FPS chart data capture (if no run is active then this command is ignored).
void	SwapControllerId ( ULocalPlayer* NewPlayer, const int32 CurrentControllerId, const int32 NewControllerID )
void	Tick ( float DeltaSeconds, bool bIdleMode )	Update everything.
void	TickDeferredCommands()	Executes the deferred commands
void	TickPerformanceMonitoring ( float DeltaSeconds )	Calculates information about the previous frame and passes it to all active performance data consumers.
void	TickWorldTravel ( FWorldContext& WorldContext, float DeltaSeconds )
void	TriggerStreamingDataRebuild()
void	TrimMemory()	Attempts to reclaim any idle memory by performing a garbage collection and broadcasting FCoreDelegates::OnMemoryTrim.
void	UpdateRunningAverageDeltaTime ( float DeltaTime, bool bAllowFrameRateSmoothing )	Updates the running average delta time Compute tick rate limitor.
void	UpdateTimeAndHandleMaxTickRate()	Update FApp::CurrentTime / FApp::DeltaTime while taking into account max tick rate.
void	UpdateTimecode()	Update FApp::Timecode.
void	UpdateTransitionType ( UWorld* CurrentWorld )
bool	UseSound()
void	VerifyLoadMapWorldCleanup()	Verify any remaining World(s) are valid after LoadMap destroys a world
void	WorldAdded ( UWorld* World )	Needs to be called when a world is added to broadcast messages.
void	WorldDestroyed ( UWorld* InWorld )	Needs to be called when a world is destroyed to broadcast messages.
bool	WorldHasValidContext ( UWorld* InWorld )
bool	WorldIsPIEInNewViewport ( UWorld* InWorld )

Overridden from UObject

	Name	Description
void	FinishDestroy()	Called to finish destroying the object.
void	PostEditChangeProperty ( FPropertyChangedEvent& PropertyCha... )	Called when a property on this object has been modified externally
void	Serialize ( FArchive& Ar )	Handles reading, writing, and reference collecting using FArchive.

Overridden from FExec

		Name	Description
	bool	Exec ( UWorld* InWorld, const TCHAR* Cmd, FOutputDevice& Ar )	Exec handler

Classes

	Name	Description
	FCopyPropertiesForUnrelatedObjectsParams	Makes a strong effort to copy everything possible from and old object to a new object of a different class, used for blueprint to update things after a recompile.
	FEditorCloseEvent	Delegate broadcast after UEditorEngine::Tick has been called (or UGameEngine::Tick in standalone)
	FLevelActorAddedEvent	Editor-only event triggered when actors are added to the world
	FLevelActorAttachedEvent	Editor-only event triggered when actors are attached in the world
	FLevelActorDeletedEvent	Editor-only event triggered when actors are deleted from the world
	FLevelActorDetachedEvent	Editor-only event triggered when actors are detached in the world
	FLevelActorFolderChangedEvent	Editor-only event triggered when actors' folders are changed
	FLevelActorListChangedEvent	Editor-only event triggered when the actor list of the world has changed
	FLevelActorOuterChangedEvent	Editor-only event triggered when actors outer changes
	FLevelActorRequestRenameEvent	Editor-only event triggered when actors are being requested to be renamed
	FLevelComponentRequestRenameEvent	Editor-only event triggered when actors are being requested to be renamed
	FOnActorMovedEvent	Editor-only event triggered after an actor is moved, rotated or scaled (AActor::PostEditMove)
	FOnActorMovingEvent	Editor-only event triggered when an actor is being moved, rotated or scaled (AActor::PostEditMove)
	FOnActorsMovedEvent	Editor-only event triggered after actors are moved, rotated or scaled by an editor system
	FOnComponentTransformChangedEvent	Editor-only event triggered when any component transform is changed
	FOnNetworkDDoSEscalation	Network burst or DDoS detected. Used for triggering analytics, mostly
	FOnNetworkFailure	Error message event relating to network failures
	FOnNetworkLagStateChanged	Network lag detected.
	FOnNewStatRegistered	Delegate we fire every time a new stat has been registered.
	FOnTravelFailure	Error message event relating to server travel failures
	FPostEditorTick	Delegate broadcast after UEditorEngine::Tick has been called (or UGameEngine::Tick in standalone)
	FWorldAddedEvent	Triggered when a world is added.
	FWorldContextDestroyedEvent	Triggered when a world context is destroyed.
	FWorldDestroyedEvent	Triggered when a world is destroyed.

Typedefs

Name	Description
FEngineStatRender	Typedef int32(UEngine::* EngineStatRender)(UWorld* World, FViewport* Viewport, FCanvas* Canvas, int32 X, int32 Y, const FVector* ViewLocation, const FRotator* ViewRotation);
FEngineStatToggle	Typedef bool (UEngine::* EngineStatToggle)(UWorld* World, FCommonViewportClient* ViewportClient, const TCHAR* Stream);

Constants

Name	Description
NewStatDelegate

Deprecated Variables

		Name	Description
	uint32: 1	bShouldGenerateLowQualityLightmaps_DEPRECATED	Whether or not the LQ lightmaps should be generated during lighting rebuilds.

Deprecated Functions

	Name	Description
FGuid	GetPackageGuid ( FName PackageName, bool bForPIE )	UPackage::Guid has not been used by the engine for a long time and UEngine::GetPackageGuid will be removed.
UWorld *	GetWorldFromContextObject ( const UObject* Object, bool bChecked )	GetWorldFromContextObject(Object) and GetWorldFromContextObject(Object, boolean) are replaced by GetWorldFromContextObject(Object, Enum) or GetWorldFromContextObjectChecked(Object)
bool	NetworkRemapPath ( UNetDriver* Driver, FString& Str, bool bReading )	Please use NetworkRemapPath that takes a connection instead.

Help shape the future of Unreal Engine documentation! Tell us how we're doing so we can serve you better.

Take our survey

Dismiss