UExponentialHeightFogComponent Class Reference

Used to create fogging effects such as clouds but with a density that is related to the height of the fog. More...

Public Member Functions
Rendering|Components|ExponentialHeightFog
void	SetFogCutoffDistance (float32 Value)
void	SetDirectionalInscatteringStartDistance (float32 Value)
void	SetFogHeightFalloff (float32 Value)
void	SetFogInscatteringColor (FLinearColor Value)
void	SetDirectionalInscatteringExponent (float32 Value)
void	SetFogDensity (float32 Value)
void	SetFullyDirectionalInscatteringColorDistance (float32 Value)
void	SetFogMaxOpacity (float32 Value)
void	SetInscatteringColorCubemap (UTextureCube Value)
void	SetInscatteringColorCubemapAngle (float32 Value)
void	SetInscatteringTextureTint (FLinearColor Value)
void	SetDirectionalInscatteringColor (FLinearColor Value)
void	SetNonDirectionalInscatteringColorDistance (float32 Value)
void	SetSecondFogDensity (float32 Value)
void	SetSecondFogHeightFalloff (float32 Value)
void	SetSecondFogHeightOffset (float32 Value)
void	SetStartDistance (float32 Value)
Rendering|VolumetricFog
void	SetVolumetricFog (bool bNewValue)
void	SetSecondFogData (FExponentialHeightFogData NewValue)
void	SetVolumetricFogAlbedo (FColor NewValue)
void	SetVolumetricFogDistance (float32 NewValue)
void	SetVolumetricFogEmissive (FLinearColor NewValue)
void	SetVolumetricFogExtinctionScale (float32 NewValue)
void	SetVolumetricFogScatteringDistribution (float32 NewValue)
Functions
const float32 &	GetFogDensity () const
	Global density factor.
const float32 &	GetFogHeightFalloff () const
	Height density factor, controls how the density increases as height decreases. Smaller values make the visible transition larger.
const FExponentialHeightFogData &	GetSecondFogData () const
	Settings for the second fog. Setting the density of this to 0 means it doesn't have any influence.
UTextureCube	GetInscatteringColorCubemap () const
	Cubemap that can be specified for fog color, which is useful to make distant, heavily fogged scene elements match the sky. When the cubemap is specified, FogInscatteringColor is ignored and Directional inscattering is disabled.
const float32 &	GetInscatteringColorCubemapAngle () const
	Angle to rotate the InscatteringColorCubemap around the Z axis.
const FLinearColor &	GetInscatteringTextureTint () const
	Tint color used when InscatteringColorCubemap is specified, for quick edits without having to reimport InscatteringColorCubemap.
const float32 &	GetFullyDirectionalInscatteringColorDistance () const
	Distance at which InscatteringColorCubemap should be used directly for the Inscattering Color.
const float32 &	GetNonDirectionalInscatteringColorDistance () const
	Distance at which only the average color of InscatteringColorCubemap should be used as Inscattering Color.
const float32 &	GetDirectionalInscatteringExponent () const
	Controls the size of the directional inscattering cone, which is used to approximate inscattering from a directional light. Note: there must be a directional light with bUsedAsAtmosphereSunLight enabled for DirectionalInscattering to be used.
const float32 &	GetDirectionalInscatteringStartDistance () const
	Controls the start distance from the viewer of the directional inscattering, which is used to approximate inscattering from a directional light. Note: there must be a directional light with bUsedAsAtmosphereSunLight enabled for DirectionalInscattering to be used.
const float32 &	GetFogMaxOpacity () const
	Maximum opacity of the fog. A value of 1 means the fog can become fully opaque at a distance and replace scene color completely, A value of 0 means the fog color will not be factored in at all.
const float32 &	GetStartDistance () const
	Distance from the camera that the fog will start, in world units.
const float32 &	GetFogCutoffDistance () const
	Scene elements past this distance will not have fog applied. This is useful for excluding skyboxes which already have fog baked in.
const float32 &	GetVolumetricFogScatteringDistribution () const
	Controls the scattering phase function - how much incoming light scatters in various directions. A distribution value of 0 scatters equally in all directions, while .9 scatters predominantly in the light direction. In order to have visible volumetric fog light shafts from the side, the distribution will need to be closer to 0.
const FColor &	GetVolumetricFogAlbedo () const
	The height fog particle reflectiveness used by volumetric fog. Water particles in air have an albedo near white, while dust has slightly darker value.
const FLinearColor &	GetVolumetricFogEmissive () const
	Light emitted by height fog. This is a density so more light is emitted the further you are looking through the fog. In most cases skylight is a better choice, however right now volumetric fog does not support precomputed lighting, So stationary skylights are unshadowed and static skylights don't affect volumetric fog at all.
const float32 &	GetVolumetricFogExtinctionScale () const
	Scales the height fog particle extinction amount used by volumetric fog. Values larger than 1 cause fog particles everywhere absorb more light.
const float32 &	GetVolumetricFogDistance () const
	Distance over which volumetric fog should be computed, after the start distance. Larger values extend the effect into the distance but expose under-sampling artifacts in details.
bool	GetbHoldout () const
	If this is True, this primitive will render black with an alpha of 0, but all secondary effects (shadows, reflections, indirect lighting) remain. This feature required the project setting "Enable alpha channel support in post processing".
void	SetbHoldout (bool Value)
	If this is True, this primitive will render black with an alpha of 0, but all secondary effects (shadows, reflections, indirect lighting) remain. This feature required the project setting "Enable alpha channel support in post processing".
bool	GetbRenderInMainPass () const
	If true, this component will be rendered in the main pass (basepass, transparency).
void	SetbRenderInMainPass (bool Value)
	If true, this component will be rendered in the main pass (basepass, transparency).
Public Member Functions inherited from USceneComponent
void	SetHiddenInGame (bool NewHidden, bool bPropagateToChildren=false)
	Changes the value of bHiddenInGame, if false this will disable Visibility during gameplay.
void	SetRelativeLocation (FVector NewLocation)
bool	GetShouldUpdatePhysicsVolume () const
	Gets whether or not the cached PhysicsVolume this component overlaps should be updated when the component is moved.
USceneComponent	GetChildComponentByClass (TSubclassOf< USceneComponent > ComponentClass)
void	GetChildrenComponentsByClass (UClass ComponentClass, bool bIncludeAllDescendants, ?&OutChildren)
bool	GetbShouldUpdatePhysicsVolume () const
	Whether or not the cached PhysicsVolume this component overlaps should be updated when the component is moved. See: GetPhysicsVolume().
void	SetbShouldUpdatePhysicsVolume (bool bInShouldUpdatePhysicsVolume)
	Whether or not the cached PhysicsVolume this component overlaps should be updated when the component is moved. See: GetPhysicsVolume().
void	AddLocalOffset (FVector DeltaLocation)
void	AddLocalRotation (FRotator DeltaRotation)
void	AddLocalRotation (FQuat DeltaRotation)
void	AddLocalTransform (FTransform DeltaTransform)
void	AddRelativeLocation (FVector DeltaLocation)
void	AddRelativeRotation (FRotator DeltaRotation)
void	AddRelativeRotation (FQuat DeltaRotation)
void	AddWorldOffset (FVector DeltaLocation)
void	AddWorldRotation (FRotator DeltaRotation)
void	AddWorldRotation (FQuat DeltaRotation)
void	AddWorldTransform (FTransform DeltaTransform)
void	AttachToComponent (USceneComponent Parent, FName SocketName=NAME_None, EAttachmentRule AttachmentRule=EAttachmentRule ::SnapToTarget)
FBoxSphereBounds	GetBounds () const
FQuat	GetComponentQuat () const
FVector	GetRelativeLocation () const
FRotator	GetRelativeRotation () const
FVector	GetRelativeScale3D () const
FVector	GetShapeCenter () const
FQuat	GetSocketQuaternion (FName SocketName)
bool	IsAttachedTo (const USceneComponent CheckComponent) const
bool	IsAttachedTo (const AActor CheckActor) const
void	SetbVisualizeComponent (bool bVisualize)
void	SetComponentQuat (FQuat NewRotation)
void	SetShouldUpdatePhysicsVolume (bool bInShouldUpdatePhysicsVolume)
	Sets whether or not the cached PhysicsVolume this component overlaps should be updated when the component is moved.
void	SetRelativeLocationAndRotation (FVector NewLocation, FRotator NewRotation)
void	SetRelativeLocationAndRotation (FVector NewLocation, FQuat NewRotation)
void	SetRelativeRotation (FRotator NewRotation)
void	SetRelativeRotation (FQuat NewRotation)
void	SetRelativeTransform (FTransform NewTransform)
void	SetWorldLocation (FVector NewLocation)
void	SetWorldLocationAndRotation (FVector NewLocation, FRotator NewRotation)
void	SetWorldLocationAndRotation (FVector NewLocation, FQuat NewRotation)
void	SetWorldRotation (FRotator NewRotation)
void	SetWorldRotation (FQuat NewRotation)
void	SetWorldTransform (FTransform NewTransform)
bool	GetbAbsoluteLocation () const
	If RelativeLocation should be considered relative to the world, rather than the parent.
void	SetbAbsoluteLocation (bool Value)
	If RelativeLocation should be considered relative to the world, rather than the parent.
bool	GetbAbsoluteRotation () const
	If RelativeRotation should be considered relative to the world, rather than the parent.
void	SetbAbsoluteRotation (bool Value)
	If RelativeRotation should be considered relative to the world, rather than the parent.
bool	GetbAbsoluteScale () const
	If RelativeScale3D should be considered relative to the world, rather than the parent.
void	SetbAbsoluteScale (bool Value)
	If RelativeScale3D should be considered relative to the world, rather than the parent.
bool	GetbVisible () const
	Whether to completely draw the primitive; if false, the primitive is not drawn, does not cast a shadow.
void	SetbVisible (bool Value)
	Whether to completely draw the primitive; if false, the primitive is not drawn, does not cast a shadow.
bool	GetbHiddenInGame () const
	Whether to hide the primitive in game, if the primitive is Visible.
void	SetbHiddenInGame (bool Value)
	Whether to hide the primitive in game, if the primitive is Visible.
bool	GetbUseAttachParentBound () const
	If true, this component uses its parents bounds when attached. This can be a significant optimization with many components attached together.
void	SetbUseAttachParentBound (bool Value)
	If true, this component uses its parents bounds when attached. This can be a significant optimization with many components attached together.
const EComponentMobility &	GetMobility () const
	How often this component is allowed to move, used to make various optimizations. Only safe to set in constructor.
void	GetParentComponents (TArray< USceneComponent > &Parents) const
	Gets all attachment parent components up to and including the root component.
void	GetChildrenComponents (bool bIncludeAllDescendants, TArray< USceneComponent > &Children) const
	Gets all components that are attached to this component, possibly recursively.
int	GetNumChildrenComponents () const
	Gets the number of attached children components.
USceneComponent	GetChildComponent (int ChildIndex) const
	Gets the attached child component at the specified location.
bool	IsAnySimulatingPhysics () const
	Returns whether the specified body is currently using physics simulation.
bool	IsSimulatingPhysics (FName BoneName=NAME_None) const
	Returns whether the specified body is currently using physics simulation.
APhysicsVolume	GetPhysicsVolume () const
	Get the PhysicsVolume overlapping this component.
void	SetVisibility (bool bNewVisibility, bool bPropagateToChildren=false)
	Set visibility of the component, if during game use this to turn on/off.
void	ToggleVisibility (bool bPropagateToChildren=false)
	Toggle visibility of the component.
bool	IsVisible () const
	Returns true if this component is visible in the current context.
TArray< FName >	GetAllSocketNames () const
	Gets the names of all the sockets on the component.
USceneComponent	GetAttachParent () const
	Get the SceneComponent we are attached to.
FTransform	GetRelativeTransform () const
	Returns the transform of the component relative to its parent.
FVector	GetRightVector () const
	Get the right (Y) unit direction vector from this component, in world space.
FVector	GetForwardVector () const
	Get the forward (X) unit direction vector from this component, in world space.
FName	GetAttachSocketName () const
	Get the socket we are attached to.
FVector	GetComponentVelocity () const
	Get velocity of the component: either ComponentVelocity, or the velocity of the physics body if simulating physics.
FRotator	GetSocketRotation (FName InSocketName) const
	Get world-space socket or bone FRotator rotation.
FTransform	GetSocketTransform (FName InSocketName, ERelativeTransformSpace TransformSpace=ERelativeTransformSpace ::RTS_World) const
	Get world-space socket transform.
FVector	GetUpVector () const
	Get the up (Z) unit direction vector from this component, in world space.
bool	DoesSocketExist (FName InSocketName) const
	Return true if socket with the given name exists.
void	DetachFromParent (bool bMaintainWorldPosition=false, bool bCallModify=true)
FVector	GetSocketLocation (FName InSocketName) const
	Get world-space socket or bone location.
void	AddLocalOffset (FVector DeltaLocation, bool bSweep, FHitResult &SweepHitResult, bool bTeleport)
	Adds a delta to the location of the component in its local reference frame.
void	AddLocalRotation (FRotator DeltaRotation, bool bSweep, FHitResult &SweepHitResult, bool bTeleport)
	Adds a delta to the rotation of the component in its local reference frame.
void	AddLocalTransform (FTransform DeltaTransform, bool bSweep, FHitResult &SweepHitResult, bool bTeleport)
	Adds a delta to the transform of the component in its local reference frame. Scale is unchanged.
void	AddRelativeLocation (FVector DeltaLocation, bool bSweep, FHitResult &SweepHitResult, bool bTeleport)
	Adds a delta to the translation of the component relative to its parent.
void	AddRelativeRotation (FRotator DeltaRotation, bool bSweep, FHitResult &SweepHitResult, bool bTeleport)
	Adds a delta the rotation of the component relative to its parent.
void	AddWorldOffset (FVector DeltaLocation, bool bSweep, FHitResult &SweepHitResult, bool bTeleport)
	Adds a delta to the location of the component in world space.
void	AddWorldRotation (FRotator DeltaRotation, bool bSweep, FHitResult &SweepHitResult, bool bTeleport)
	Adds a delta to the rotation of the component in world space.
void	AddWorldTransform (FTransform DeltaTransform, bool bSweep, FHitResult &SweepHitResult, bool bTeleport)
	Adds a delta to the transform of the component in world space. Ignores scale and sets it to (1,1,1).
void	AddWorldTransformKeepScale (FTransform DeltaTransform, bool bSweep, FHitResult &SweepHitResult, bool bTeleport)
	Adds a delta to the transform of the component in world space. Scale is unchanged.
bool	AttachTo (USceneComponent InParent, FName InSocketName=NAME_None, EAttachLocation AttachType=EAttachLocation ::KeepRelativeOffset, bool bWeldSimulatedBodies=true)
bool	AttachToComponent (USceneComponent Parent, FName SocketName, EAttachmentRule LocationRule, EAttachmentRule RotationRule, EAttachmentRule ScaleRule, bool bWeldSimulatedBodies)
	Attach this component to another scene component, optionally at a named socket. It is valid to call this on components whether or not they have been Registered.
void	DetachFromComponent (EDetachmentRule LocationRule=EDetachmentRule ::KeepRelative, EDetachmentRule RotationRule=EDetachmentRule ::KeepRelative, EDetachmentRule ScaleRule=EDetachmentRule ::KeepRelative, bool bCallModify=true)
	Detach this component from whatever it is attached to. Automatically unwelds components that are welded together (see AttachToComponent), though note that some effects of welding may not be undone.
FVector	GetWorldLocation () const
	Return location of the component, in world space.
FRotator	GetWorldRotation () const
	Returns rotation of the component, in world space.
FVector	GetWorldScale () const
	Returns scale of the component, in world space.
FTransform	GetWorldTransform () const
	Get the current component-to-world transform for this component.
void	SetRelativeLocation (FVector NewLocation, bool bSweep, FHitResult &SweepHitResult, bool bTeleport)
	Set the location of the component relative to its parent.
void	SetRelativeLocationAndRotation (FVector NewLocation, FRotator NewRotation, bool bSweep, FHitResult &SweepHitResult, bool bTeleport)
	Set the location and rotation of the component relative to its parent.
void	SetRelativeRotation (FRotator NewRotation, bool bSweep, FHitResult &SweepHitResult, bool bTeleport)
	Set the rotation of the component relative to its parent.
void	SetRelativeTransform (FTransform NewTransform, bool bSweep, FHitResult &SweepHitResult, bool bTeleport)
	Set the transform of the component relative to its parent.
void	SetWorldLocation (FVector NewLocation, bool bSweep, FHitResult &SweepHitResult, bool bTeleport)
	Put this component at the specified location in world space. Updates relative location to achieve the final world location.
void	SetWorldLocationAndRotation (FVector NewLocation, FRotator NewRotation, bool bSweep, FHitResult &SweepHitResult, bool bTeleport)
	Set the relative location and rotation of the component to put it at the supplied pose in world space.
void	SetWorldRotation (FRotator NewRotation, bool bSweep, FHitResult &SweepHitResult, bool bTeleport)
	Put this component at the specified rotation in world space. Updates relative rotation to achieve the final world rotation.
void	SetWorldTransform (FTransform NewTransform, bool bSweep, FHitResult &SweepHitResult, bool bTeleport)
	Set the transform of the component in world space.
void	ResetRelativeTransform ()
	Reset the transform of the component relative to its parent. Sets relative location to zero, relative rotation to no rotation, and Scale to 1.
void	SetAbsolute (bool bNewAbsoluteLocation=false, bool bNewAbsoluteRotation=false, bool bNewAbsoluteScale=false)
	Set which parts of the relative transform should be relative to parent, and which should be relative to world.
void	SetWorldScale3D (FVector NewScale)
	Set the relative scale of the component to put it at the supplied scale in world space.
void	SetMobility (EComponentMobility NewMobility)
	Set how often this component is allowed to move during runtime. Causes a component re-register if the component is already registered.
void	SetRelativeScale3D (FVector NewScale3D)
	Set the non-uniform scale of the component relative to its parent.
Public Member Functions inherited from UActorComponent
void	Tick (float32 DeltaSeconds)
	Event called every frame if tick is enabled.
EComponentCreationMethod	GetComponentCreationMethod () const
void	SetbIsEditorOnly (bool Value)
void	EndPlay (EEndPlayReason EndPlayReason)
	Blueprint implementable event for when the component ends play, generally via destruction or its Actor's EndPlay.
void	BeginPlay ()
	Blueprint implementable event for when the component is beginning play, called before its owning actor's BeginPlay or when the component is dynamically created if the Actor has already BegunPlay.
void	MarkRenderStateDirty ()
bool	HasBegunPlay () const
void	SetbTickInEditor (bool Value)
bool	IsVisualizationComponent () const
void	SetIsVisualizationComponent (bool Value)
void	AsyncPhysicsTick (float32 DeltaSeconds, float32 SimSeconds)
	Event called every async physics tick if bAsyncPhysicsTickEnabled is true.
bool	GetbReplicateUsingRegisteredSubObjectList () const
	When true the replication system will only replicate the registered subobjects list When false the replication system will instead call the virtual ReplicateSubObjects() function where the subobjects need to be manually replicated.
void	SetbReplicateUsingRegisteredSubObjectList (bool Value)
	When true the replication system will only replicate the registered subobjects list When false the replication system will instead call the virtual ReplicateSubObjects() function where the subobjects need to be manually replicated.
bool	GetbReplicates () const
	Is this component currently replicating? Should the network code consider it for replication? Owning Actor must be replicating first!
void	SetbReplicates (bool Value)
	Is this component currently replicating? Should the network code consider it for replication? Owning Actor must be replicating first!
bool	GetbAutoActivate () const
	Whether the component is activated at creation or must be explicitly activated.
void	SetbAutoActivate (bool Value)
	Whether the component is activated at creation or must be explicitly activated.
void	SetbEditableWhenInherited (bool Value)
	True if this component can be modified when it was inherited from a parent actor class.
void	SetbCanEverAffectNavigation (bool Value)
	Whether this component can potentially influence navigation.
bool	GetbIsEditorOnly () const
	If true, the component will be excluded from non-editor builds.
bool	IsBeingDestroyed () const
	Returns whether the component is in the process of being destroyed.
void	SetIsReplicated (bool ShouldReplicate)
	Enable or disable replication. This is the equivalent of RemoteRole for actors (only a bool is required for components).
void	DestroyComponent (UObject Object)
	Unregister and mark for pending kill a component. This may not be used to destroy a component that is owned by an actor unless the owning actor is calling the function.
bool	ComponentHasTag (FName Tag) const
	See if this component contains the supplied tag.
AActor	GetOwner () const
	Follow the Outer chain to get the AActor that 'Owns' this component.
void	SetAutoActivate (bool bNewAutoActivate)
	Sets whether the component should be auto activate or not. Only safe during construction scripts.
bool	IsActive () const
	Returns whether the component is active or not.
void	ToggleActive ()
	Toggles the active state of the component.
void	SetActive (bool bNewActive, bool bReset=false)
	Sets whether the component is active or not.
void	Activate (bool bReset=false)
	Activates the SceneComponent, should be overridden by native child classes.
void	Deactivate ()
	Deactivates the SceneComponent.
float32	GetComponentTickInterval () const
	Returns the tick interval for this component's primary tick function, which is the frequency in seconds at which it will be executed.
void	AddTickPrerequisiteActor (AActor PrerequisiteActor)
	Make this component tick after PrerequisiteActor.
void	AddTickPrerequisiteComponent (UActorComponent PrerequisiteComponent)
	Make this component tick after PrerequisiteComponent.
void	RemoveTickPrerequisiteComponent (UActorComponent PrerequisiteComponent)
	Remove tick dependency on PrerequisiteComponent.
void	SetTickableWhenPaused (bool bTickableWhenPaused)
	Sets whether this component can tick when paused.
bool	IsComponentTickEnabled () const
	Returns whether this component has tick enabled or not.
void	SetTickGroup (ETickingGroup NewTickGroup)
	Changes the ticking group for this component.
void	RemoveTickPrerequisiteActor (AActor PrerequisiteActor)
	Remove tick dependency on PrerequisiteActor.
void	SetComponentTickIntervalAndCooldown (float32 TickInterval)
	Sets the tick interval for this component's primary tick function. Does not enable the tick interval. Takes effect imediately.
void	SetComponentTickInterval (float32 TickInterval)
	Sets the tick interval for this component's primary tick function. Does not enable the tick interval. Takes effect on next tick.
void	SetComponentTickEnabled (bool bEnabled)
	Set this component's tick functions to be enabled or disabled. Only has an effect if the function is registered.
Public Member Functions inherited from UObject
bool	MarkPackageDirty () const
void	RemoveFromRoot ()
bool	GetIsRooted () const
bool	IsTransient () const
bool	Modify (bool bAlwaysMarkDirty=true)
void	SetTransactional (bool bTransactional)
bool	IsSupportedForNetworking () const
UClass	GetClass () const
UObject	GetOuter () const
UObject	GetTypedOuter (TSubclassOf< UObject > Target) const
	Traverses the outer chain searching for the next object of a certain type.
UPackage	GetOutermost () const
UPackage	GetPackage () const
void	AddToRoot ()
UWorld	GetWorld () const
FName	GetName () const
FString	GetFullName (const UObject StopOuter=nullptr) const
FString	GetPathName (const UObject StopOuter=nullptr) const
bool	IsA (const UClass Class) const
	Returns true if this object is of the specified type, or a child of that type.
void	SaveConfig ()
void	LoadConfig ()
void	ReloadConfig ()
void	CopyScriptPropertiesFrom (const UObject OtherObject)
void	opCast (?&Address) const
FString	ToString () const

Static Public Member Functions
Static Functions
static UExponentialHeightFogComponent	Get (const AActor Actor, FName WithName=NAME_None)
static UExponentialHeightFogComponent	GetOrCreate (AActor Actor, FName WithName=NAME_None)
static UExponentialHeightFogComponent	Create (AActor Actor, FName WithName=NAME_None)
static UClass	StaticClass ()
Static Public Member Functions inherited from USceneComponent
static USceneComponent	Get (const AActor Actor, FName WithName=NAME_None)
static USceneComponent	GetOrCreate (AActor Actor, FName WithName=NAME_None)
static USceneComponent	Create (AActor Actor, FName WithName=NAME_None)
static UClass	StaticClass ()
Static Public Member Functions inherited from UActorComponent
static UActorComponent	Get (const AActor Actor, FName WithName=NAME_None)
static UActorComponent	GetOrCreate (AActor Actor, FName WithName=NAME_None)
static UActorComponent	Create (AActor Actor, FName WithName=NAME_None)
static UClass	StaticClass ()
Static Public Member Functions inherited from UObject
static UClass	StaticClass ()

Public Attributes
DirectionalInscattering
float32	DirectionalInscatteringExponent
	Controls the size of the directional inscattering cone, which is used to approximate inscattering from a directional light. Note: there must be a directional light with bUsedAsAtmosphereSunLight enabled for DirectionalInscattering to be used.
FLinearColor	DirectionalInscatteringLuminance
	Controls the color of the directional inscattering, which is used to approximate inscattering from a directional light. Note: there must be a directional light with bUsedAsAtmosphereSunLight enabled for DirectionalInscattering to be used.
float32	DirectionalInscatteringStartDistance
	Controls the start distance from the viewer of the directional inscattering, which is used to approximate inscattering from a directional light. Note: there must be a directional light with bUsedAsAtmosphereSunLight enabled for DirectionalInscattering to be used.
ExponentialHeightFogComponent
float32	StartDistance
	Distance from the camera that the fog will start, in world units.
float32	FogMaxOpacity
	Maximum opacity of the fog. A value of 1 means the fog can become fully opaque at a distance and replace scene color completely, A value of 0 means the fog color will not be factored in at all.
float32	FogCutoffDistance
	Scene elements past this distance will not have fog applied. This is useful for excluding skyboxes which already have fog baked in.
FLinearColor	FogInscatteringLuminance
FLinearColor	SkyAtmosphereAmbientContributionColorScale
	Color used to modulate the SkyAtmosphere component contribution to the non directional component of the fog. Only effective when r.SupportSkyAtmosphereAffectsHeightFog>0.
float32	FogDensity
	Global density factor.
float32	FogHeightFalloff
	Height density factor, controls how the density increases as height decreases. Smaller values make the visible transition larger.
FExponentialHeightFogData	SecondFogData
	Settings for the second fog. Setting the density of this to 0 means it doesn't have any influence.
InscatteringTexture
float32	InscatteringColorCubemapAngle
	Angle to rotate the InscatteringColorCubemap around the Z axis.
FLinearColor	InscatteringTextureTint
	Tint color used when InscatteringColorCubemap is specified, for quick edits without having to reimport InscatteringColorCubemap.
UTextureCube	InscatteringColorCubemap
	Cubemap that can be specified for fog color, which is useful to make distant, heavily fogged scene elements match the sky. When the cubemap is specified, FogInscatteringColor is ignored and Directional inscattering is disabled.
float32	FullyDirectionalInscatteringColorDistance
	Distance at which InscatteringColorCubemap should be used directly for the Inscattering Color.
float32	NonDirectionalInscatteringColorDistance
	Distance at which only the average color of InscatteringColorCubemap should be used as Inscattering Color.
VolumetricFog
float32	VolumetricFogStartDistance
	Distance from the camera that the volumetric fog will start, in world units.
bool	bEnableVolumetricFog
	Whether to enable Volumetric fog. Scalability settings control the resolution of the fog simulation. Note that Volumetric fog currently does not support StartDistance, FogMaxOpacity and FogCutoffDistance. Volumetric fog also can't match exponential height fog in general as exponential height fog has non-physical behavior.
float32	VolumetricFogStaticLightingScatteringIntensity
bool	bOverrideLightColorsWithFogInscatteringColors
	Whether to use FogInscatteringColor for the Sky Light volumetric scattering color and DirectionalInscatteringColor for the Directional Light scattering color. Make sure your directional light has 'Atmosphere Sun Light' enabled! Enabling this allows Volumetric fog to better match Height fog in the distance, but produces non-physical volumetric lighting that may not match surface lighting.
FLinearColor	VolumetricFogEmissive
	Light emitted by height fog. This is a density so more light is emitted the further you are looking through the fog. In most cases skylight is a better choice, however right now volumetric fog does not support precomputed lighting, So stationary skylights are unshadowed and static skylights don't affect volumetric fog at all.
float32	VolumetricFogExtinctionScale
	Scales the height fog particle extinction amount used by volumetric fog. Values larger than 1 cause fog particles everywhere absorb more light.
float32	VolumetricFogDistance
	Distance over which volumetric fog should be computed, after the start distance. Larger values extend the effect into the distance but expose under-sampling artifacts in details.
float32	VolumetricFogNearFadeInDistance
	Distance over which volumetric fog will fade in from the start distance.
float32	VolumetricFogScatteringDistribution
	Controls the scattering phase function - how much incoming light scatters in various directions. A distribution value of 0 scatters equally in all directions, while .9 scatters predominantly in the light direction. In order to have visible volumetric fog light shafts from the side, the distribution will need to be closer to 0.
FColor	VolumetricFogAlbedo
	The height fog particle reflectiveness used by volumetric fog. Water particles in air have an albedo near white, while dust has slightly darker value.
Public Attributes inherited from USceneComponent
EDetailMode	DetailMode
	If detail mode is >= system detail mode, primitive won't be rendered.
EComponentMobility	Mobility
	How often this component is allowed to move, used to make various optimizations. Only safe to set in constructor.
FVector	RelativeLocation
	Location of the component relative to its parent.
bool	bAbsoluteRotation
	If RelativeRotation should be considered relative to the world, rather than the parent.
bool	bAbsoluteLocation
	If RelativeLocation should be considered relative to the world, rather than the parent.
bool	bAbsoluteScale
	If RelativeScale3D should be considered relative to the world, rather than the parent.
FRotator	RelativeRotation
	Rotation of the component relative to its parent.
FVector	RelativeScale3D
	Non-uniform scaling of the component relative to its parent. Note that scaling is always applied in local space (no shearing etc).
FVector	WorldLocation
const FBoxSphereBounds	Bounds
const USceneComponent	AttachParent
	What we are currently attached to. If valid, RelativeLocation etc. are used relative to this object.
FRotator	WorldRotation
const FVector	ShapeCenter
FQuat	ComponentQuat
bool	ShouldUpdatePhysicsVolume
	Gets whether or not the cached PhysicsVolume this component overlaps should be updated when the component is moved.
const APhysicsVolume	PhysicsVolume
	Physics Volume in which this SceneComponent is located *.
const FVector	ComponentVelocity
	Velocity of the component. @see GetComponentVelocity().
const FName	AttachSocketName
	Optional socket name on AttachParent that we are attached to.
FTransform	WorldTransform
const FVector	WorldScale
const int	NumChildrenComponents
	Gets the number of attached children components.
bool	bShouldUpdatePhysicsVolume
	Whether or not the cached PhysicsVolume this component overlaps should be updated when the component is moved. @see GetPhysicsVolume().
FPhysicsVolumeChanged	PhysicsVolumeChangedDelegate
	Delegate that will be called when PhysicsVolume has been changed *.
bool	bUseAttachParentBound
	If true, this component uses its parents bounds when attached. This can be a significant optimization with many components attached together.
bool	bVisible
	Whether to completely draw the primitive; if false, the primitive is not drawn, does not cast a shadow.
bool	bHiddenInGame
	Whether to hide the primitive in game, if the primitive is Visible.
const FVector	ForwardVector
	Get the forward (X) unit direction vector from this component, in world space.
const FVector	UpVector
	Get the up (Z) unit direction vector from this component, in world space.
FTransform	RelativeTransform
	Returns the transform of the component relative to its parent.
const FVector	RightVector
	Get the right (Y) unit direction vector from this component, in world space.
const TArray< FName >	AllSocketNames
	Gets the names of all the sockets on the component.
Public Attributes inherited from UActorComponent
bool	bAutoActivate
	Whether the component is activated at creation or must be explicitly activated.
TArray< TObjectPtr< UAssetUserData > >	AssetUserData
	Array of user data stored with the component.
TArray< TObjectPtr< UAssetUserData > >	AssetUserDataEditorOnly
	Array of user data stored with the component.
bool	bReplicates
	Is this component currently replicating? Should the network code consider it for replication? Owning Actor must be replicating first!
FActorComponentTickFunction	PrimaryComponentTick
	Main tick function for the Component.
bool	bIsEditorOnly
	If true, the component will be excluded from non-editor builds.
bool	bReplicateUsingRegisteredSubObjectList
	When true the replication system will only replicate the registered subobjects list When false the replication system will instead call the virtual ReplicateSubObjects() function where the subobjects need to be manually replicated.
TArray< FName >	ComponentTags
	Array of tags that can be used for grouping and categorizing. Can also be accessed from scripting.
const EComponentCreationMethod	ComponentCreationMethod
const AActor	Owner
	Follow the Outer chain to get the AActor that 'Owns' this component.
FActorComponentDeactivateSignature	OnComponentDeactivated
	Called when the component has been deactivated.
FActorComponentActivatedSignature	OnComponentActivated
	Called when the component has been activated, with parameter indicating if it was from a reset.
float32	ComponentTickInterval
	Returns the tick interval for this component's primary tick function, which is the frequency in seconds at which it will be executed.
Public Attributes inherited from UObject
const UClass	Class
const UObject	Outer
const UPackage	Outermost
const UPackage	Package
const UWorld	World
const FName	Name
const bool	IsRooted

Rendering
bool	bRenderInMainPass
	If true, this component will be rendered in the main pass (basepass, transparency).
bool	bHoldout
	If this is True, this primitive will render black with an alpha of 0, but all secondary effects (shadows, reflections, indirect lighting) remain. This feature required the project setting "Enable alpha channel support in post processing".
void	SetHoldout (bool bNewHoldout)
void	SetRenderInMainPass (bool bValue)

Detailed Description

Used to create fogging effects such as clouds but with a density that is related to the height of the fog.

Member Function Documentation

Create()

UExponentialHeightFogComponent Create ( AActor Actor, FName WithName = NAME_None )

static

Get()

UExponentialHeightFogComponent Get ( const AActor Actor, FName WithName = NAME_None )

static

GetbHoldout()

bool GetbHoldout

(

)

const

If this is True, this primitive will render black with an alpha of 0, but all secondary effects (shadows, reflections, indirect lighting) remain. This feature required the project setting "Enable alpha channel support in post processing".

GetbRenderInMainPass()

bool GetbRenderInMainPass

(

)

const

If true, this component will be rendered in the main pass (basepass, transparency).

GetDirectionalInscatteringExponent()

const float32 & GetDirectionalInscatteringExponent

(

)

const

Controls the size of the directional inscattering cone, which is used to approximate inscattering from a directional light. Note: there must be a directional light with bUsedAsAtmosphereSunLight enabled for DirectionalInscattering to be used.

GetDirectionalInscatteringStartDistance()

const float32 & GetDirectionalInscatteringStartDistance

(

)

const

Controls the start distance from the viewer of the directional inscattering, which is used to approximate inscattering from a directional light. Note: there must be a directional light with bUsedAsAtmosphereSunLight enabled for DirectionalInscattering to be used.

GetFogCutoffDistance()

const float32 & GetFogCutoffDistance

(

)

const

Scene elements past this distance will not have fog applied. This is useful for excluding skyboxes which already have fog baked in.

GetFogDensity()

const float32 & GetFogDensity

(

)

const

Global density factor.

GetFogHeightFalloff()

const float32 & GetFogHeightFalloff

(

)

const

Height density factor, controls how the density increases as height decreases. Smaller values make the visible transition larger.

GetFogMaxOpacity()

const float32 & GetFogMaxOpacity

(

)

const

Maximum opacity of the fog. A value of 1 means the fog can become fully opaque at a distance and replace scene color completely, A value of 0 means the fog color will not be factored in at all.

GetFullyDirectionalInscatteringColorDistance()

const float32 & GetFullyDirectionalInscatteringColorDistance

(

)

const

Distance at which InscatteringColorCubemap should be used directly for the Inscattering Color.

GetInscatteringColorCubemap()

UTextureCube GetInscatteringColorCubemap

(

)

const

Cubemap that can be specified for fog color, which is useful to make distant, heavily fogged scene elements match the sky. When the cubemap is specified, FogInscatteringColor is ignored and Directional inscattering is disabled.

GetInscatteringColorCubemapAngle()

const float32 & GetInscatteringColorCubemapAngle

(

)

const

Angle to rotate the InscatteringColorCubemap around the Z axis.

GetInscatteringTextureTint()

const FLinearColor & GetInscatteringTextureTint

(

)

const

Tint color used when InscatteringColorCubemap is specified, for quick edits without having to reimport InscatteringColorCubemap.

GetNonDirectionalInscatteringColorDistance()

const float32 & GetNonDirectionalInscatteringColorDistance

(

)

const

Distance at which only the average color of InscatteringColorCubemap should be used as Inscattering Color.

GetOrCreate()

UExponentialHeightFogComponent GetOrCreate ( AActor Actor, FName WithName = NAME_None )

static

GetSecondFogData()

const FExponentialHeightFogData & GetSecondFogData

(

)

const

Settings for the second fog. Setting the density of this to 0 means it doesn't have any influence.

GetStartDistance()

const float32 & GetStartDistance

(

)

const

Distance from the camera that the fog will start, in world units.

GetVolumetricFogAlbedo()

const FColor & GetVolumetricFogAlbedo

(

)

const

The height fog particle reflectiveness used by volumetric fog. Water particles in air have an albedo near white, while dust has slightly darker value.

GetVolumetricFogDistance()

const float32 & GetVolumetricFogDistance

(

)

const

Distance over which volumetric fog should be computed, after the start distance. Larger values extend the effect into the distance but expose under-sampling artifacts in details.

GetVolumetricFogEmissive()

const FLinearColor & GetVolumetricFogEmissive

(

)

const

Light emitted by height fog. This is a density so more light is emitted the further you are looking through the fog. In most cases skylight is a better choice, however right now volumetric fog does not support precomputed lighting, So stationary skylights are unshadowed and static skylights don't affect volumetric fog at all.

GetVolumetricFogExtinctionScale()

const float32 & GetVolumetricFogExtinctionScale

(

)

const

Scales the height fog particle extinction amount used by volumetric fog. Values larger than 1 cause fog particles everywhere absorb more light.

GetVolumetricFogScatteringDistribution()

const float32 & GetVolumetricFogScatteringDistribution

(

)

const

Controls the scattering phase function - how much incoming light scatters in various directions. A distribution value of 0 scatters equally in all directions, while .9 scatters predominantly in the light direction. In order to have visible volumetric fog light shafts from the side, the distribution will need to be closer to 0.

SetbHoldout()

void SetbHoldout

(

bool

Value

)

If this is True, this primitive will render black with an alpha of 0, but all secondary effects (shadows, reflections, indirect lighting) remain. This feature required the project setting "Enable alpha channel support in post processing".

SetbRenderInMainPass()

void SetbRenderInMainPass

(

bool

Value

)

If true, this component will be rendered in the main pass (basepass, transparency).

SetDirectionalInscatteringColor()

void SetDirectionalInscatteringColor

(

FLinearColor

Value

)

SetDirectionalInscatteringExponent()

void SetDirectionalInscatteringExponent

(

float32

Value

)

SetDirectionalInscatteringStartDistance()

void SetDirectionalInscatteringStartDistance

(

float32

Value

)

SetFogCutoffDistance()

void SetFogCutoffDistance

(

float32

Value

)

SetFogDensity()

void SetFogDensity

(

float32

Value

)

SetFogHeightFalloff()

void SetFogHeightFalloff

(

float32

Value

)

SetFogInscatteringColor()

void SetFogInscatteringColor

(

FLinearColor

Value

)

SetFogMaxOpacity()

void SetFogMaxOpacity

(

float32

Value

)

SetFullyDirectionalInscatteringColorDistance()

void SetFullyDirectionalInscatteringColorDistance

(

float32

Value

)

SetHoldout()

void SetHoldout

(

bool

bNewHoldout

)

SetInscatteringColorCubemap()

void SetInscatteringColorCubemap

(

UTextureCube

Value

)

SetInscatteringColorCubemapAngle()

void SetInscatteringColorCubemapAngle

(

float32

Value

)

SetInscatteringTextureTint()

void SetInscatteringTextureTint

(

FLinearColor

Value

)

SetNonDirectionalInscatteringColorDistance()

void SetNonDirectionalInscatteringColorDistance

(

float32

Value

)

SetRenderInMainPass()

void SetRenderInMainPass

(

bool

bValue

)

SetSecondFogData()

void SetSecondFogData

(

FExponentialHeightFogData

NewValue

)

SetSecondFogDensity()

void SetSecondFogDensity

(

float32

Value

)

SetSecondFogHeightFalloff()

void SetSecondFogHeightFalloff

(

float32

Value

)

SetSecondFogHeightOffset()

void SetSecondFogHeightOffset

(

float32

Value

)

SetStartDistance()

void SetStartDistance

(

float32

Value

)

SetVolumetricFog()

void SetVolumetricFog

(

bool

bNewValue

)

SetVolumetricFogAlbedo()

void SetVolumetricFogAlbedo

(

FColor

NewValue

)

SetVolumetricFogDistance()

void SetVolumetricFogDistance

(

float32

NewValue

)

SetVolumetricFogEmissive()

void SetVolumetricFogEmissive

(

FLinearColor

NewValue

)

SetVolumetricFogExtinctionScale()

void SetVolumetricFogExtinctionScale

(

float32

NewValue

)

SetVolumetricFogScatteringDistribution()

void SetVolumetricFogScatteringDistribution

(

float32

NewValue

)

StaticClass()

UClass StaticClass ( )

static

Member Data Documentation

bEnableVolumetricFog

bool bEnableVolumetricFog

Whether to enable Volumetric fog. Scalability settings control the resolution of the fog simulation. Note that Volumetric fog currently does not support StartDistance, FogMaxOpacity and FogCutoffDistance. Volumetric fog also can't match exponential height fog in general as exponential height fog has non-physical behavior.

bHoldout

bool bHoldout

If this is True, this primitive will render black with an alpha of 0, but all secondary effects (shadows, reflections, indirect lighting) remain. This feature required the project setting "Enable alpha channel support in post processing".

bOverrideLightColorsWithFogInscatteringColors

bool bOverrideLightColorsWithFogInscatteringColors

Whether to use FogInscatteringColor for the Sky Light volumetric scattering color and DirectionalInscatteringColor for the Directional Light scattering color. Make sure your directional light has 'Atmosphere Sun Light' enabled! Enabling this allows Volumetric fog to better match Height fog in the distance, but produces non-physical volumetric lighting that may not match surface lighting.

bRenderInMainPass

bool bRenderInMainPass

If true, this component will be rendered in the main pass (basepass, transparency).

DirectionalInscatteringExponent

float32 DirectionalInscatteringExponent

Controls the size of the directional inscattering cone, which is used to approximate inscattering from a directional light. Note: there must be a directional light with bUsedAsAtmosphereSunLight enabled for DirectionalInscattering to be used.

DirectionalInscatteringLuminance

FLinearColor DirectionalInscatteringLuminance

Controls the color of the directional inscattering, which is used to approximate inscattering from a directional light. Note: there must be a directional light with bUsedAsAtmosphereSunLight enabled for DirectionalInscattering to be used.

DirectionalInscatteringStartDistance

float32 DirectionalInscatteringStartDistance

Controls the start distance from the viewer of the directional inscattering, which is used to approximate inscattering from a directional light. Note: there must be a directional light with bUsedAsAtmosphereSunLight enabled for DirectionalInscattering to be used.

FogCutoffDistance

float32 FogCutoffDistance

Scene elements past this distance will not have fog applied. This is useful for excluding skyboxes which already have fog baked in.

FogDensity

float32 FogDensity

Global density factor.

FogHeightFalloff

float32 FogHeightFalloff

Height density factor, controls how the density increases as height decreases. Smaller values make the visible transition larger.

FogInscatteringLuminance

FLinearColor FogInscatteringLuminance

FogMaxOpacity

float32 FogMaxOpacity

Maximum opacity of the fog. A value of 1 means the fog can become fully opaque at a distance and replace scene color completely, A value of 0 means the fog color will not be factored in at all.

FullyDirectionalInscatteringColorDistance

float32 FullyDirectionalInscatteringColorDistance

Distance at which InscatteringColorCubemap should be used directly for the Inscattering Color.

InscatteringColorCubemap

UTextureCube InscatteringColorCubemap

Cubemap that can be specified for fog color, which is useful to make distant, heavily fogged scene elements match the sky. When the cubemap is specified, FogInscatteringColor is ignored and Directional inscattering is disabled.

InscatteringColorCubemapAngle

float32 InscatteringColorCubemapAngle

Angle to rotate the InscatteringColorCubemap around the Z axis.

InscatteringTextureTint

FLinearColor InscatteringTextureTint

Tint color used when InscatteringColorCubemap is specified, for quick edits without having to reimport InscatteringColorCubemap.

NonDirectionalInscatteringColorDistance

float32 NonDirectionalInscatteringColorDistance

Distance at which only the average color of InscatteringColorCubemap should be used as Inscattering Color.

SecondFogData

FExponentialHeightFogData SecondFogData

Settings for the second fog. Setting the density of this to 0 means it doesn't have any influence.

SkyAtmosphereAmbientContributionColorScale

FLinearColor SkyAtmosphereAmbientContributionColorScale

Color used to modulate the SkyAtmosphere component contribution to the non directional component of the fog. Only effective when r.SupportSkyAtmosphereAffectsHeightFog>0.

StartDistance

float32 StartDistance

Distance from the camera that the fog will start, in world units.

VolumetricFogAlbedo

FColor VolumetricFogAlbedo

The height fog particle reflectiveness used by volumetric fog. Water particles in air have an albedo near white, while dust has slightly darker value.

VolumetricFogDistance

float32 VolumetricFogDistance

Distance over which volumetric fog should be computed, after the start distance. Larger values extend the effect into the distance but expose under-sampling artifacts in details.

VolumetricFogEmissive

FLinearColor VolumetricFogEmissive

Light emitted by height fog. This is a density so more light is emitted the further you are looking through the fog. In most cases skylight is a better choice, however right now volumetric fog does not support precomputed lighting, So stationary skylights are unshadowed and static skylights don't affect volumetric fog at all.

VolumetricFogExtinctionScale

float32 VolumetricFogExtinctionScale

Scales the height fog particle extinction amount used by volumetric fog. Values larger than 1 cause fog particles everywhere absorb more light.

VolumetricFogNearFadeInDistance

float32 VolumetricFogNearFadeInDistance

Distance over which volumetric fog will fade in from the start distance.

VolumetricFogScatteringDistribution

float32 VolumetricFogScatteringDistribution

Controls the scattering phase function - how much incoming light scatters in various directions. A distribution value of 0 scatters equally in all directions, while .9 scatters predominantly in the light direction. In order to have visible volumetric fog light shafts from the side, the distribution will need to be closer to 0.

VolumetricFogStartDistance

float32 VolumetricFogStartDistance

Distance from the camera that the volumetric fog will start, in world units.

VolumetricFogStaticLightingScatteringIntensity

float32 VolumetricFogStaticLightingScatteringIntensity