The three virtues of a programmer: Laziness, Impatience, and Hubris. – Larry Wall

From Unreal Wiki, The Unreal Engine Documentation Site

Object >> Actor

Package: 

Engine

Known classes within Actor:

NavigationHandle

Direct subclasses:

Brush, CameraActor, Camera, Controller, CrowdAgentBase, CrowdAgent, CrowdAttractor, CrowdReplicationActor, DecalActorBase, DecalManager, DroppedPickup, DynamicSMActor, EmitterPool, Emitter, FluidInfluenceActor, FluidSurfaceActor, FractureManager, FracturedStaticMeshActor, GameCrowdInteractionPoint, GameCrowdReplicationActor, GameExplosionActor, HUD, Info, InventoryManager, Inventory, KAsset, Keypoint, LensFlareSource, Light, MaterialInstanceActor, MatineeActor, NavMeshObstacle, NavigationPoint, Note, NxForceField, ParticleEventManager, Pawn, PhysAnimTestActor, PhysXDestructiblePart, PrefabInstance, Projectile, PylonSeed, RadialBlurActor, RigidBodyBase, SceneCaptureActor, SkeletalMeshActor, SpeedTreeActor, SplineActor, StaticMeshActorBase, StaticMeshActorBasedOnExtremeContent, Trigger, UTAvoidMarker, UTCarriedObject, UTGib, UTJumpBootEffect, UTLinkBeamLight, UTVehicleBoostPad, UTWeaponAttachment, UTWeaponShield, VehicleMovementEffect

This class in other games:

RTNP, U1, U2, U2XMP, UE2Runtime, UT, UT2003, UT2004, UT3

Actor: The base class of all actors. Actor is the base class of all gameplay objects. A large number of properties, behaviors and interfaces are implemented in Actor, including:

- Display - Animation - Physics and world interaction - Making sounds - Networking properties - Actor creation and destruction - Actor iterator functions - Message broadcasting

[edit] Constants

[edit] TRACEFLAG_Bullet

Value: 1

List of extra trace flags

[edit] TRACEFLAG_PhysicsVolumes

Value: 2

[edit] TRACEFLAG_SkipMovers

Value: 4

[edit] TRACEFLAG_Blocking

Value: 8

[edit] REP_RBLOCATION_ERROR_TOLERANCE_SQ

Value: 16.0f

when bReplicateRigidBodyLocation is true, the root body of a ragdoll will be replicated but this is not entirely accurate (and isn't meant to be) as the other bodies in the ragdoll may interfere this can then result in jittering from the client constantly trying to apply the replicated value so if the client's error is less than this amount from the replicated value, it will be ignored

[edit] MINFLOORZ

Value: 0.7

[edit] ACTORMAXSTEPHEIGHT

Value: 35.0

max height floor walking actor can step up to

[edit] RBSTATE_LINVELSCALE

Value: 10.0

[edit] RBSTATE_ANGVELSCALE

Value: 1000.0

[edit] RB_None

Value: 0x00

Not set, empty

[edit] RB_NeedsUpdate

Value: 0x01

If bNewData & RB_NeedsUpdate != 0 then an update is needed

[edit] RB_Sleeping

Value: 0x02

if bNewData & RB_Sleeping != 0 then this RigidBody needs to sleep

[edit] Properties

[edit] Property group 'Advanced'

[edit] bConsiderAllStaticMeshComponentsForStreaming

Type: bool

If true, texture streaming code iterates over all StaticMeshComponents found on this actor when building texture streaming information.

[edit] bEdShouldSnap

Type: bool

Snap to grid in editor.

[edit] bHiddenEd

Type: bool

Modifiers: const

Is hidden during editing.

[edit] bHiddenEdGroup

Type: bool

Modifiers: const

Is hidden by the group brower.

[edit] bLockLocation

Type: bool

Prevent the actor from being moved in the editor.

[edit] TickFrequencyAtEndDistance

Type: float

When the actor is TickFrequencyDecreaseDistanceEnd from the player, tick at this frequency (in seconds, bigger is less frequent ticks). If this is 0, no decrease in frequency will occur

[edit] Property group 'Attachment'

[edit] Base

Type: Actor

Modifiers: const

Actor we're standing on.

[edit] BaseBoneName

Type: name

[edit] BaseSkelComponent

Type: SkeletalMeshComponent

[edit] bHardAttach

Type: bool

Modifiers: const

[edit] bIgnoreBaseRotation

Type: bool

[edit] bShadowParented

Type: bool

If TRUE, BaseSkelComponent is used as the shadow parent for this actor.

[edit] Property group 'Collision'

[edit] bCanStepUpOn

Type: bool

If TRUE, PHYS_Walking will attempt to step up onto this object when it hits it

Default value: True

[edit] bCollideComplex

Type: bool

Ignore Simple Collision on Static Meshes, and collide per Poly.

[edit] BlockRigidBody

Type: bool

Modifiers: const, transient

mirrored copy of CollisionComponent's BlockRigidBody for the Actor property window for LDs (so it's next to CollisionType) purely for editing convenience and not used at all by the physics code

[edit] bNoEncroachCheck

Type: bool

For encroachers, don't do the overlap check when they move. You will not get touch events for this actor moving, but it is much faster. So if you want touch events from volumes or triggers you need to set this to be FALSE. This is an optimisation for large numbers of PHYS_RigidBody actors for example.

[edit] bPathColliding

Type: bool

this actor should collide (if bWorldGeometry && bBlockActors is true) during path building (ignored if bStatic is true, as actor will always collide during path building)

[edit] bPhysRigidBodyOutOfWorldCheck

Type: bool

If true, do a zero-extent trace each frame from old to new Location when in PHYS_RigidBody. If it hits the world (ie might be tunneling), call FellOutOfWorld.

[edit] CollisionComponent

Type: PrimitiveComponent

Modifiers: editconst

[edit] CollisionType

Type: ECollisionType

Modifiers: const, transient

enum for LDs to select collision options - sets Actor flags and that of our CollisionComponent via PostEditChange()

Default value: COLLIDE_NoCollision

[edit] Property group 'Debug'

[edit] bDebug

Type: bool

[edit] Property group 'Display'

[edit] bHidden

Type: bool

Modifiers: const

If this is True, all PrimitiveComponents of the actor are hidden. If this is false, only PrimitiveComponents with HiddenGame=True are hidden.

[edit] DrawScale

Type: float

Modifiers: const, interp

Scaling factor, 1.0=normal size.

Default value: 1.0

[edit] DrawScale3D

Type: Object.Vector

Modifiers: const, interp

Scaling vector, (1.0,1.0,1.0)=normal size.

Default value:

[edit] PrePivot

Type: Object.Vector

Modifiers: const

Offset from box center for drawing.

[edit] Property group 'Movement'

[edit] Location

Type: Object.Vector

Modifiers: const

Actor's location; use Move or SetLocation to change.

[edit] Physics

Type: EPhysics

Modifiers: const

[edit] Rotation

Type: Object.Rotator

Modifiers: const

The actor's rotation; use SetRotation to change.

[edit] RotationRate

Type: Object.Rotator

Change in rotation per second.

[edit] Property group 'Navigation'

[edit] bBlocksNavigation

Type: bool

indicates that this Actor can dynamically block AI paths

[edit] Property group 'Object'

[edit] Group

Type: name

[edit] Tag

Type: name

Actor's tag name.

[edit] Property group 'Physics'

[edit] bAllowFluidSurfaceInteraction

Type: bool

Whether this actor will interact with fluid surfaces or not.

Default value: True

[edit] Internal variables

See Actor internal variables.

[edit] Enums

See Actor enums.

[edit] Structs

See Actor structs.

[edit] Functions

[edit] Static native functions

[edit] BP2Vect

This will take the BasedPosition passed and return a Vector for it *

[edit] DrawDebugBox

Draw a debug box

[edit] DrawDebugCone

Draw a debug cone

[edit] DrawDebugCoordinateSystem

Draw Debug coordinate system

[edit] DrawDebugCylinder

Draw a debug cylinder

[edit] DrawDebugLine

Draw a debug line

[edit] DrawDebugPoint

Draw a debug point

[edit] DrawDebugSphere

Draw a debug sphere

[edit] FlushPersistentDebugLines

Flush persistent lines

[edit] GetBasedPosition

This will take the BasedPosition passed and return a Vector for it *

[edit] GetPackageGuid

Looks up the GUID of a package on disk. The package must NOT be in the autodownload cache. This may require loading the header of the package in question and is therefore slow.

[edit] SetBasedPosition

This will calculate and then set the passed in BasedPosition. This is just modifying the passed in BasedPosition.

[edit] Vect2BP

This will calculate and then set the passed in BasedPosition. This is just modifying the passed in BasedPosition.

[edit] Other static functions

[edit] GetLocalString

[edit] ReplaceText

[edit] Iterator functions

[edit] AllActors

[edit] AllOwnedComponents

Iterates over all components directly or indirectly attached to this actor.

Parameters:

• BaseClass - Only components deriving from BaseClass will be iterated upon.
• OutComponent - The iteration variable.

[edit] BasedActors

[edit] ChildActors

[edit] CollidingActors

[edit] ComponentList

returns each component in the Components list

[edit] DynamicActors

[edit] LocalPlayerControllers

iterator LocalPlayerControllers() returns all locally rendered/controlled player controllers (typically 1 per client, unless split screen)

[edit] OverlappingActors

Returns colliding (bCollideActors==true) which overlap a Sphere from location 'Loc' and 'Radius' radius.

Parameters:

• BaseClass - The Actor returns must be a subclass of this.
• out_Actor - returned Actor at each iteration.
• Radius - Radius of sphere for overlapping check.
• Loc - Center of sphere for overlapping check. (Optional, caller's location is used otherwise).
• bIgnoreHidden - if true, ignore bHidden actors.

[edit] TouchingActors

[edit] TraceActors

[edit] VisibleActors

[edit] VisibleCollidingActors

[edit] Latent functions

[edit] FinishAnim

[edit] Sleep

[edit] Native functions

See Actor native functions.

[edit] Events

See Actor events.

[edit] Other instance functions

See Actor instance functions.