Class Animator

The Animator component plays and manages animations on a GameObject. It works with an AnimatorController to handle state transitions and animation blending. A new AnimatorController can be created from code via AnimatorController.createFromClips.

Hierarchy (View Summary)

Implements

  • IAnimationComponent

Properties

applyRootMotion gameObject guid hasRootMotion keepAnimatorControllerStateOnDisable sourceId?

Accessors

activeAndEnabled context currentAction destroyed enabled forward isAnimationComponent isDirty layer minMaxOffsetNormalized minMaxSpeed name parametersAreDirty right runtimeAnimatorController scene static tag up worldEuler worldPosition worldQuaternion worldRotation

Methods

addEventListener awake destroy dispatchEvent earlyUpdate? getBool GetBool getCurrentStateInfo getFloat GetFloat getInteger GetInteger getTrigger GetTrigger initializeRuntimeAnimatorController isInTransition IsInTransition lateUpdate? onAfterRender? onBeforeRender onBeforeXR? onCollisionEnter? onCollisionExit? onCollisionStay? onDestroy onDisable onEnable onEnterXR? onLeaveXR? onPausedChanged? onPointerClick? onPointerDown? onPointerEnter? onPointerExit? onPointerMove? onPointerUp? onTriggerEnter? onTriggerExit? onTriggerStay? onUpdateXR? onValidate? onXRControllerAdded? onXRControllerRemoved? play Play removeEventListener reset Reset resetTrigger ResetTrigger resolveGuids? setBool SetBool setFloat SetFloat setInteger SetInteger setSpeed SetSpeed setTrigger SetTrigger setWorldPosition setWorldQuaternion setWorldRotation start? startCoroutine stopCoroutine supportsXR? toggleBool update?

Properties

applyRootMotion

applyRootMotion: boolean = false

When enabled, animation will affect the root transform position and rotation

gameObject

gameObject: GameObject

Reference to the GameObject this component is attached to This is a three.js Object3D with additional GameObject functionality

guid

guid: string = "invalid"

Unique identifier for this component instance, used for finding and tracking components

hasRootMotion

hasRootMotion: boolean = false

Indicates whether this animator contains root motion data

keepAnimatorControllerStateOnDisable

keepAnimatorControllerStateOnDisable: boolean = false

When enabled, the animator will maintain its state when the component is disabled

OptionalsourceId

sourceId?: string

Identifier for the source asset that created this component. For example, URL to the glTF file this component was loaded from

Accessors

activeAndEnabled

  • get activeAndEnabled(): boolean

    Checks if this component is currently active (enabled and part of an active GameObject hierarchy) Components that are inactive won't receive lifecycle method calls

    Returns boolean

    True if the component is enabled and all parent GameObjects are active

context

  • get context(): Context

    The context this component belongs to, providing access to the runtime environment including physics, timing utilities, camera, and scene

    Returns Context

  • set context(context: Context): void

    Parameters

    Returns void

currentAction

  • get currentAction(): null | AnimationAction

    The currently playing animation action that can be used to modify animation properties

    Returns null | AnimationAction

    The current animation action, or null if no animation is playing

destroyed

  • get destroyed(): boolean

    Checks if this component has been destroyed

    Returns boolean

    True if the component or its GameObject has been destroyed

enabled

  • get enabled(): boolean

    Controls whether this component is enabled Disabled components don't receive lifecycle callbacks

    Returns boolean

  • set enabled(val: boolean): void

    Parameters

    • val: boolean

    Returns void

forward

  • get forward(): Vector3

    Gets the forward direction vector (0,0,-1) of this component's GameObject in world space

    Returns Vector3

isAnimationComponent

  • get isAnimationComponent(): boolean

    Identifies this component as an animation component in the engine

    Returns boolean

isDirty

  • get isDirty(): boolean

    Indicates whether the animator state has changed since the last update

    Returns boolean

    True if the animator has been changed

layer

  • get layer(): number

    The layer value of the GameObject this component is attached to Used for visibility and physics filtering

    Returns number

minMaxOffsetNormalized

  • set minMaxOffsetNormalized(minMax: { x: number; y: number }): void

    Sets a random normalized time offset for animations between min (x) and max (y) values

    Parameters

    • minMax: { x: number; y: number }

      Object with x (min) and y (max) values for the offset range

    Returns void

minMaxSpeed

  • set minMaxSpeed(minMax: { x: number; y: number }): void

    Sets a random playback speed between the min and max values

    Parameters

    • minMax: { x: number; y: number }

      Object with x (minimum) and y (maximum) speed values

    Returns void

name

  • get name(): string

    The name of the GameObject this component is attached to Used for debugging and finding objects

    Returns string

  • set name(str: string): void

    Parameters

    • str: string

    Returns void

parametersAreDirty

  • get parametersAreDirty(): boolean

    Indicates whether animation parameters have been modified since the last update

    Returns boolean

    True if parameters have been changed

right

  • get right(): Vector3

    Gets the right direction vector (1,0,0) of this component's GameObject in world space

    Returns Vector3

runtimeAnimatorController

  • get runtimeAnimatorController(): undefined | null | AnimatorController

    Gets the current animator controller instance

    Returns undefined | null | AnimatorController

    The current animator controller or null if none is assigned

  • set runtimeAnimatorController(
        val: undefined | null | AnimatorControllerModel | AnimatorController,
    ): void

    Sets or replaces the animator controller for this component. Handles binding the controller to this animator instance and ensures proper initialization when the controller changes.

    Parameters

    • val: undefined | null | AnimatorControllerModel | AnimatorController

      The animator controller model or instance to use

    Returns void

scene

  • get scene(): Scene

    Shorthand accessor for the current scene from the context

    Returns Scene

    The scene this component belongs to

static

  • get static(): boolean

    Indicates whether the GameObject is marked as static Static objects typically don't move and can be optimized by the engine

    Returns boolean

  • set static(value: boolean): void

    Parameters

    • value: boolean

    Returns void

tag

  • get tag(): string

    The tag of the GameObject this component is attached to Used for categorizing objects and efficient lookup

    Returns string

  • set tag(str: string): void

    Parameters

    • str: string

    Returns void

up

  • get up(): Vector3

    Gets the up direction vector (0,1,0) of this component's GameObject in world space

    Returns Vector3

worldEuler

  • get worldEuler(): Euler

    Gets the rotation of this component's GameObject in world space as Euler angles (in radians)

    Returns Euler

  • set worldEuler(val: Euler): void

    Sets the rotation of this component's GameObject in world space using Euler angles (in radians)

    Parameters

    • val: Euler

      The world rotation Euler angles to set

    Returns void

worldPosition

  • get worldPosition(): Vector3

    Gets the position of this component's GameObject in world space.
    Note: This is equivalent to calling this.gameObject.worldPosition

    Returns Vector3

  • set worldPosition(val: Vector3): void

    Sets the position of this component's GameObject in world space

    Parameters

    • val: Vector3

      The world position vector to set

    Returns void

worldQuaternion

  • get worldQuaternion(): Quaternion

    Gets the rotation of this component's GameObject in world space as a quaternion Note: This is equivalent to calling this.gameObject.worldQuaternion

    Returns Quaternion

  • set worldQuaternion(val: Quaternion): void

    Sets the rotation of this component's GameObject in world space using a quaternion

    Parameters

    • val: Quaternion

      The world rotation quaternion to set

    Returns void

worldRotation

  • get worldRotation(): Vector3

    Gets the rotation of this component's GameObject in world space as Euler angles (in degrees)
    Note: This is equivalent to calling this.gameObject.worldRotation

    Returns Vector3

  • set worldRotation(val: Vector3): void

    Sets the rotation of this component's GameObject in world space using Euler angles (in degrees)

    Parameters

    • val: Vector3

      The world rotation vector to set (in degrees)

    Returns void

Methods

addEventListener

  • addEventListener<T extends Event>(type: string, listener: (evt: T) => any): void

    Registers an event listener for the specified event type

    Type Parameters

    Parameters

    • type: string

      The event type to listen for

    • listener: (evt: T) => any

      The callback function to execute when the event occurs

    Returns void

awake

  • awake(): void

    Called once when the component becomes active for the first time. This is the first lifecycle callback to be invoked

    Returns void

destroy

  • destroy(): void

    Destroys this component and removes it from its GameObject After destruction, the component will no longer receive lifecycle callbacks

    Returns void

dispatchEvent

  • dispatchEvent(evt: Event): boolean

    Dispatches an event to all registered listeners

    Parameters

    • evt: Event

      The event object to dispatch

    Returns boolean

    Always returns false (standard implementation of EventTarget)

OptionalearlyUpdate

  • earlyUpdate(): void

    Called at the beginning of each frame before regular updates. Use for logic that needs to run before standard update callbacks.

    Returns void

getBool

  • getBool(name: string | number): boolean

    Gets a boolean parameter from the animator

    Parameters

    • name: string | number

      The name or hash of the parameter

    Returns boolean

    The value of the boolean parameter, or false if not found

GetBool

  • GetBool(name: string | number): boolean

    Parameters

    • name: string | number

    Returns boolean

    Deprecated

    use getBool

getCurrentStateInfo

  • getCurrentStateInfo(): undefined | null | AnimatorStateInfo

    Retrieves information about the current animation state

    Returns undefined | null | AnimatorStateInfo

    The current state information, or undefined if no state is playing

getFloat

  • getFloat(name: string | number): number

    Gets a float parameter from the animator

    Parameters

    • name: string | number

      The name or hash of the parameter

    Returns number

    The value of the float parameter, or -1 if not found

GetFloat

  • GetFloat(name: string | number): number

    Parameters

    • name: string | number

    Returns number

    Deprecated

    use getFloat

getInteger

  • getInteger(name: string | number): number

    Gets an integer parameter from the animator

    Parameters

    • name: string | number

      The name or hash of the parameter

    Returns number

    The value of the integer parameter, or -1 if not found

GetInteger

  • GetInteger(name: string | number): number

    Parameters

    • name: string | number

    Returns number

    Deprecated

    use getInteger

getTrigger

  • getTrigger(name: string | number): undefined | boolean

    Gets the state of a trigger parameter from the animator

    Parameters

    • name: string | number

      The name or hash of the trigger parameter

    Returns undefined | boolean

    The state of the trigger parameter

GetTrigger

  • GetTrigger(name: string | number): void

    Parameters

    • name: string | number

    Returns void

    Deprecated

    use getTrigger

initializeRuntimeAnimatorController

  • initializeRuntimeAnimatorController(force?: boolean): void

    Parameters

    • force: boolean = false

    Returns void

isInTransition

  • isInTransition(): boolean

    Checks if the animator is currently in a transition between states

    Returns boolean

    True if the animator is currently blending between animations

IsInTransition

  • IsInTransition(): boolean

    Returns boolean

    Deprecated

    use isInTransition

OptionallateUpdate

  • lateUpdate(): void

    Called after all update functions have been called. Use for calculations that depend on other components being updated first.

    Returns void

OptionalonAfterRender

  • onAfterRender(): void

    Called after the scene has been rendered. Use for post-processing or UI updates that should happen after rendering

    Returns void

onBeforeRender

  • onBeforeRender(): void

    Called immediately before the scene is rendered.

    Returns void

OptionalonBeforeXR

  • onBeforeXR(mode: XRSessionMode, args: XRSessionInit): void

    Called before an XR session is requested Use to modify session initialization parameters

    Parameters

    • mode: XRSessionMode

      The XR session mode being requested

    • args: XRSessionInit

      The session initialization parameters that can be modified

    Returns void

OptionalonCollisionEnter

  • onCollisionEnter(col: Collision): any

    Called when this component's collider begins colliding with another collider.

    Parameters

    • col: Collision

      Information about the collision that occurred

    Returns any

OptionalonCollisionExit

  • onCollisionExit(col: Collision): any

    Called when this component's collider stops colliding with another collider.

    Parameters

    • col: Collision

      Information about the collision that ended

    Returns any

OptionalonCollisionStay

  • onCollisionStay(col: Collision): any

    Called each frame while this component's collider is colliding with another collider

    Parameters

    • col: Collision

      Information about the ongoing collision

    Returns any

onDestroy

  • onDestroy(): void

    Called when the component is destroyed. Use for cleanup operations like removing event listeners

    Returns void

onDisable

  • onDisable(): void

    Called every time the component becomes disabled or inactive in the hierarchy. Invoked when the component or any parent GameObject becomes invisible

    Returns void

onEnable

  • onEnable(): void

    Called every time the component becomes enabled or active in the hierarchy. Invoked after awake and before start.

    Returns void

OptionalonEnterXR

OptionalonLeaveXR

OptionalonPausedChanged

  • onPausedChanged(isPaused: boolean, wasPaused: boolean): void

    Called when the context's pause state changes.

    Parameters

    • isPaused: boolean

      Whether the context is currently paused

    • wasPaused: boolean

      The previous pause state

    Returns void

OptionalonPointerClick

OptionalonPointerDown

OptionalonPointerEnter

OptionalonPointerExit

OptionalonPointerMove

OptionalonPointerUp

OptionalonTriggerEnter

  • onTriggerEnter(col: ICollider): any

    Called when this component's trigger collider is entered by another collider

    Parameters

    • col: ICollider

      The collider that entered this trigger

    Returns any

OptionalonTriggerExit

  • onTriggerExit(col: ICollider): any

    Called when another collider exits this component's trigger collider

    Parameters

    • col: ICollider

      The collider that exited this trigger

    Returns any

OptionalonTriggerStay

  • onTriggerStay(col: ICollider): any

    Called each frame while another collider is inside this component's trigger collider

    Parameters

    • col: ICollider

      The collider that is inside this trigger

    Returns any

OptionalonUpdateXR

OptionalonValidate

  • onValidate(prop?: string): void

    Called when a field decorated with @validate() is modified.

    Parameters

    • Optionalprop: string

      The name of the field that was changed

    Returns void

OptionalonXRControllerAdded

OptionalonXRControllerRemoved

play

  • play(
        name: string | number,
        layer?: number,
        normalizedTime?: number,
        transitionDurationInSec?: number,
    ): void

    Plays an animation on the animator

    Parameters

    • name: string | number

      The name or hash of the animation to play

    • layer: number = -1

      The layer to play the animation on (-1 for default layer)

    • normalizedTime: number = Number.NEGATIVE_INFINITY

      The time position to start playing (0-1 range, NEGATIVE_INFINITY for current position)

    • transitionDurationInSec: number = 0

      The duration of the blend transition in seconds

    Returns void

Play

  • Play(
        name: string | number,
        layer?: number,
        normalizedTime?: number,
        transitionDurationInSec?: number,
    ): void

    Parameters

    • name: string | number
    • layer: number = -1
    • normalizedTime: number = Number.NEGATIVE_INFINITY
    • transitionDurationInSec: number = 0

    Returns void

    Deprecated

    use play()

removeEventListener

  • removeEventListener<T extends Event>(
        type: string,
        listener: (arg: T) => any,
    ): void

    Removes a previously registered event listener

    Type Parameters

    Parameters

    • type: string

      The event type the listener was registered for

    • listener: (arg: T) => any

      The callback function to remove

    Returns void

reset

  • reset(): void

    Resets the animator controller to its initial state

    Returns void

Reset

  • Reset(): void

    Returns void

    Deprecated

    use reset

resetTrigger

  • resetTrigger(name: string | number): void

    Resets a trigger parameter in the animator

    Parameters

    • name: string | number

      The name or hash of the trigger parameter

    Returns void

ResetTrigger

  • ResetTrigger(name: string | number): void

    Parameters

    • name: string | number

    Returns void

    Deprecated

    use resetTrigger

OptionalresolveGuids

  • resolveGuids(guidsMap: GuidsMap): void

    Called when this component needs to remap guids after an instantiate operation.

    Parameters

    • guidsMap: GuidsMap

      Mapping from old guids to newly generated guids

    Returns void

setBool

  • setBool(name: string | number, value: boolean): void

    Sets a boolean parameter in the animator

    Parameters

    • name: string | number

      The name or hash of the parameter

    • value: boolean

      The boolean value to set

    Returns void

SetBool

  • SetBool(name: string | number, val: boolean): void

    Parameters

    • name: string | number
    • val: boolean

    Returns void

    Deprecated

    use setBool

setFloat

  • setFloat(name: string | number, val: number): void

    Sets a float parameter in the animator

    Parameters

    • name: string | number

      The name or hash of the parameter

    • val: number

      The float value to set

    Returns void

SetFloat

  • SetFloat(name: string | number, val: number): void

    Parameters

    • name: string | number
    • val: number

    Returns void

    Deprecated

    use setFloat

setInteger

  • setInteger(name: string | number, val: number): void

    Sets an integer parameter in the animator

    Parameters

    • name: string | number

      The name or hash of the parameter

    • val: number

      The integer value to set

    Returns void

SetInteger

  • SetInteger(name: string | number, val: number): void

    Parameters

    • name: string | number
    • val: number

    Returns void

    Deprecated

    use setInteger

setSpeed

  • setSpeed(speed: number): void

    Sets the playback speed of the animator

    Parameters

    • speed: number

      The new playback speed multiplier

    Returns void

SetSpeed

  • SetSpeed(speed: number): void

    Parameters

    • speed: number

    Returns void

    Deprecated

    use setSpeed

setTrigger

  • setTrigger(name: string | number): void

    Activates a trigger parameter in the animator

    Parameters

    • name: string | number

      The name or hash of the trigger parameter

    Returns void

SetTrigger

  • SetTrigger(name: string | number): void

    Parameters

    • name: string | number

    Returns void

    Deprecated

    use setTrigger

setWorldPosition

  • setWorldPosition(x: number, y: number, z: number): void

    Sets the position of this component's GameObject in world space using individual coordinates

    Parameters

    • x: number

      X-coordinate in world space

    • y: number

      Y-coordinate in world space

    • z: number

      Z-coordinate in world space

    Returns void

setWorldQuaternion

  • setWorldQuaternion(x: number, y: number, z: number, w: number): void

    Sets the rotation of this component's GameObject in world space using quaternion components

    Parameters

    • x: number

      X component of the quaternion

    • y: number

      Y component of the quaternion

    • z: number

      Z component of the quaternion

    • w: number

      W component of the quaternion

    Returns void

setWorldRotation

  • setWorldRotation(x: number, y: number, z: number, degrees?: boolean): void

    Sets the rotation of this component's GameObject in world space using individual Euler angles

    Parameters

    • x: number

      X-axis rotation

    • y: number

      Y-axis rotation

    • z: number

      Z-axis rotation

    • degrees: boolean = true

      Whether the values are in degrees (true) or radians (false)

    Returns void

Optionalstart

  • start(): void

    Called once at the beginning of the first frame after the component is enabled. Use for initialization that requires other components to be awake.

    Returns void

startCoroutine

  • startCoroutine(routine: Generator, evt?: FrameEvent): Generator

    Starts a coroutine that can yield to wait for events. Coroutines allow for time-based sequencing of operations without blocking. Coroutines are based on generator functions, a JavaScript language feature.

    Parameters

    • routine: Generator

      Generator function to start

    • evt: FrameEvent = FrameEvent.Update

      Event to register the coroutine for (default: FrameEvent.Update)

    Returns Generator

    The generator function that can be used to stop the coroutine

    Example

    Time-based sequencing of operations

    *myCoroutine() {
      yield WaitForSeconds(1); // wait for 1 second
      yield WaitForFrames(10); // wait for 10 frames
      yield new Promise(resolve => setTimeout(resolve, 1000)); // wait for a promise to resolve
    }

    Example

    Coroutine that logs a message every 5 frames

    onEnable() {
      this.startCoroutine(this.myCoroutine());
    }
    private *myCoroutine() {
      while(this.activeAndEnabled) {
        console.log("Hello World", this.context.time.frame);
        // wait for 5 frames
        for(let i = 0; i < 5; i++) yield;
      }
    }

stopCoroutine

  • stopCoroutine(routine: Generator, evt?: FrameEvent): void

    Stops a coroutine that was previously started with startCoroutine

    Parameters

    • routine: Generator

      The routine to be stopped

    • evt: FrameEvent = FrameEvent.Update

      The frame event the routine was registered with

    Returns void

OptionalsupportsXR

  • supportsXR(mode: XRSessionMode): boolean

    Determines if this component supports a specific XR mode

    Parameters

    • mode: XRSessionMode

      The XR session mode to check support for

    Returns boolean

    True if the component supports the specified mode

toggleBool

  • toggleBool(name: string | number): void

    Toggles a boolean parameter between true and false

    Parameters

    • name: string | number

      The name or hash of the parameter

    Returns void

Optionalupdate

  • update(): void

    Called once per frame during the main update loop. The primary location for frame-based game logic.

    Returns void

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addEventListenerawakedestroydispatchEventearlyUpdategetBoolGetBoolgetCurrentStateInfogetFloatGetFloatgetIntegerGetIntegergetTriggerGetTriggerinitializeRuntimeAnimatorControllerisInTransitionIsInTransitionlateUpdateonAfterRenderonBeforeRenderonBeforeXRonCollisionEnteronCollisionExitonCollisionStayonDestroyonDisableonEnableonEnterXRonLeaveXRonPausedChangedonPointerClickonPointerDownonPointerEnteronPointerExitonPointerMoveonPointerUponTriggerEnteronTriggerExitonTriggerStayonUpdateXRonValidateonXRControllerAddedonXRControllerRemovedplayPlayremoveEventListenerresetResetresetTriggerResetTriggerresolveGuidssetBoolSetBoolsetFloatSetFloatsetIntegerSetIntegersetSpeedSetSpeedsetTriggerSetTriggersetWorldPositionsetWorldQuaternionsetWorldRotationstartstartCoroutinestopCoroutinesupportsXRtoggleBoolupdate