Class XRBaseInteractor

Abstract base class from which all interactor behaviours derive. This class hooks into the interaction system (via XRInteractionManager) and provides base virtual methods for handling hover and selection

Inheritance
object
Object
Component
Behaviour
MonoBehaviour
XRBaseInteractor
ARGestureInteractor
XRBaseControllerInteractor
XRPokeInteractor
XRSocketInteractor
Implements
Inherited Members
Object.FindObjectsByType<T>(FindObjectsSortMode)
Object.FindObjectsByType<T>(FindObjectsInactive, FindObjectsSortMode)
Object.FindFirstObjectByType<T>()
Object.FindAnyObjectByType<T>()
Object.FindFirstObjectByType<T>(FindObjectsInactive)
Object.FindAnyObjectByType<T>(FindObjectsInactive)
Namespace: UnityEngine.XR.Interaction.Toolkit
Assembly: Unity.XR.Interaction.Toolkit.dll
Syntax
[SelectionBase]
[DisallowMultipleComponent]
[DefaultExecutionOrder(-99)]
public abstract class XRBaseInteractor : MonoBehaviour, IXRHoverInteractor, IXRSelectInteractor, IXRTargetPriorityInteractor, IXRGroupMember, IXRInteractionStrengthInteractor, IXRInteractor

Properties

allowHover

Defines whether this interactor allows hover events.

Declaration
public bool allowHover { get; set; }
Property Value
Type Description
bool
Remarks

A hover exit event will still occur if this value is disabled while hovering.

allowSelect

Defines whether this interactor allows select events.

Declaration
public bool allowSelect { get; set; }
Property Value
Type Description
bool
Remarks

A select exit event will still occur if this value is disabled while selecting.

attachTransform

The Transform that is used as the attach point for Interactables.

Declaration
public Transform attachTransform { get; set; }
Property Value
Type Description
Transform
Remarks

Automatically instantiated and set in Awake() if null. Setting this will not automatically destroy the previous object.

containingGroup

The Interaction Group that contains this member.

Declaration
public IXRInteractionGroup containingGroup { get; }
Property Value
Type Description
IXRInteractionGroup

disableVisualsWhenBlockedInGroup

Whether to disable Interactor visuals (such as XRInteractorLineVisual) when this Interactor is part of an IXRInteractionGroup and is incapable of interacting due to active interaction by another Interactor in the Group.

Declaration
public bool disableVisualsWhenBlockedInGroup { get; set; }
Property Value
Type Description
bool

firstInteractableSelected

(Read Only) The first Interactable selected since not having any selection. This Interactor may not currently be selecting the Interactable, which would be the case when it was released while multiple Interactables were selected.

Declaration
public IXRSelectInteractable firstInteractableSelected { get; }
Property Value
Type Description
IXRSelectInteractable
See Also

hasHover

(Read Only) Indicates whether this Interactor is currently hovering an Interactable.

Declaration
public bool hasHover { get; }
Property Value
Type Description
bool
Remarks

In other words, returns whether interactablesHovered contains any Interactables. 

interactablesHovered.Count > 0

See Also

hasSelection

(Read Only) Indicates whether this Interactor is currently selecting an Interactable.

Declaration
public bool hasSelection { get; }
Property Value
Type Description
bool
Remarks

In other words, returns whether interactablesSelected contains any Interactables. 

interactablesSelected.Count > 0

See Also

hoverEntered

The event that is called when this Interactor begins hovering over an Interactable.

Declaration
public HoverEnterEvent hoverEntered { get; set; }
Property Value
Type Description
HoverEnterEvent
Remarks

The HoverEnterEventArgs passed to each listener is only valid while the event is invoked, do not hold a reference to it.

See Also

hoverExited

The event that is called when this Interactor ends hovering over an Interactable.

Declaration
public HoverExitEvent hoverExited { get; set; }
Property Value
Type Description
HoverExitEvent
Remarks

The HoverExitEventArgs passed to each listener is only valid while the event is invoked, do not hold a reference to it.

See Also

hoverFilters

The list of hover filters in this object. Used as additional hover validations for this Interactor.

Declaration
public IXRFilterList<IXRHoverFilter> hoverFilters { get; }
Property Value
Type Description
IXRFilterList<IXRHoverFilter>
Remarks

While processing hover filters, all changes to this list don't have an immediate effect. These changes are buffered and applied when the processing is finished. Calling MoveTo(T, int) in this list will throw an exception when this list is being processed.

See Also

interactablesHovered

(Read Only) The list of Interactables that are currently being hovered over (may by empty).

Declaration
public List<IXRHoverInteractable> interactablesHovered { get; }
Property Value
Type Description
List<IXRHoverInteractable>
Remarks

You should treat this as a read only view of the list and should not modify it. It is exposed as a List<T> rather than an IReadOnlyList<T> to avoid GC Allocations when enumerating the list.

See Also

interactablesSelected

(Read Only) The list of Interactables that are currently being selected (may by empty).

Declaration
public List<IXRSelectInteractable> interactablesSelected { get; }
Property Value
Type Description
List<IXRSelectInteractable>
Remarks

This should be treated as a read only view of the list and should not be modified by external callers. It is exposed as a List<T> rather than an IReadOnlyList<T> to avoid GC Allocations when enumerating the list.

See Also

interactionLayers

Allows interaction with Interactables whose Interaction Layer Mask overlaps with any Layer in this Interaction Layer Mask.

Declaration
public InteractionLayerMask interactionLayers { get; set; }
Property Value
Type Description
InteractionLayerMask
See Also

interactionManager

The XRInteractionManager that this Interactor will communicate with (will find one if null).

Declaration
public XRInteractionManager interactionManager { get; set; }
Property Value
Type Description
XRInteractionManager

isHoverActive

(Read Only) Indicates whether this Interactor is in a state where it could hover.

Declaration
public virtual bool isHoverActive { get; }
Property Value
Type Description
bool

isPerformingManualInteraction

Defines whether this interactor is performing a manual interaction or not.

Declaration
public bool isPerformingManualInteraction { get; }
Property Value
Type Description
bool
See Also

isSelectActive

(Read Only) Indicates whether this Interactor is in a state where it could select.

Declaration
public virtual bool isSelectActive { get; }
Property Value
Type Description
bool

keepSelectedTargetValid

Whether to keep selecting an Interactable after initially selecting it even when it is no longer a valid target.

Declaration
public bool keepSelectedTargetValid { get; set; }
Property Value
Type Description
bool
Remarks

Return true to make the XRInteractionManager retain the selection even if the Interactable is not contained within the list of valid targets. Return false to make the Interaction Manager clear the selection if it isn't within the list of valid targets.
A common use for disabling this is for Ray Interactors used for teleportation to make the teleportation Interactable no longer selected when not currently pointing at it.

largestInteractionStrength

The largest interaction strength value of all interactables this interactor is hovering or selecting.

Declaration
public IReadOnlyBindableVariable<float> largestInteractionStrength { get; }
Property Value
Type Description
IReadOnlyBindableVariable<float>

selectEntered

The event that is called when this Interactor begins selecting an Interactable.

Declaration
public SelectEnterEvent selectEntered { get; set; }
Property Value
Type Description
SelectEnterEvent
Remarks

The SelectEnterEventArgs passed to each listener is only valid while the event is invoked, do not hold a reference to it.

See Also

selectExited

The event that is called when this Interactor ends selecting an Interactable.

Declaration
public SelectExitEvent selectExited { get; set; }
Property Value
Type Description
SelectExitEvent
Remarks

The SelectEnterEventArgs passed to each listener is only valid while the event is invoked, do not hold a reference to it.

See Also

selectFilters

The list of select filters in this object. Used as additional select validations for this Interactor.

Declaration
public IXRFilterList<IXRSelectFilter> selectFilters { get; }
Property Value
Type Description
IXRFilterList<IXRSelectFilter>
Remarks

While processing select filters, all changes to this list don't have an immediate effect. Theses changes are buffered and applied when the processing is finished. Calling MoveTo(T, int) in this list will throw an exception when this list is being processed.

See Also

selectedInteractableMovementTypeOverride

(Read Only) Overriding movement type of the selected Interactable's movement. By default, this does not override the movement type.

Declaration
public virtual XRBaseInteractable.MovementType? selectedInteractableMovementTypeOverride { get; }
Property Value
Type Description
XRBaseInteractable.MovementType?
Remarks

You can use this to change the effective movement type of an Interactable for different Interactors. An example would be having an Interactable use VelocityTracking so it does not move through geometry with a Collider when interacting with it using a Ray or Direct Interactor, but have a Socket Interactor override the movement type to be Instantaneous for reduced movement latency.

See Also

startingHoverFilters

The hover filters that this object uses to automatically populate the hoverFilters List at startup (optional, may be empty). All objects in this list should implement the IXRHoverFilter interface.

Declaration
public List<Object> startingHoverFilters { get; set; }
Property Value
Type Description
List<Object>
Remarks

To access and modify the hover filters used after startup, the hoverFilters List should be used instead.

See Also

startingSelectFilters

The select filters that this object uses to automatically populate the selectFilters List at startup (optional, may be empty). All objects in this list should implement the IXRSelectFilter interface.

Declaration
public List<Object> startingSelectFilters { get; set; }
Property Value
Type Description
List<Object>
Remarks

To access and modify the select filters used after startup, the selectFilters List should be used instead.

See Also

startingSelectedInteractable

The Interactable that this Interactor automatically selects at startup (optional, may be null).

Declaration
public XRBaseInteractable startingSelectedInteractable { get; set; }
Property Value
Type Description
XRBaseInteractable

startingTargetFilter

The Target Filter that this Interactor automatically links at startup (optional, may be null).

Declaration
public XRBaseTargetFilter startingTargetFilter { get; set; }
Property Value
Type Description
XRBaseTargetFilter
Remarks

To modify the Target Filter after startup, the targetFilter property should be used instead.

See Also

targetFilter

The Target Filter that this Interactor is linked to.

Declaration
public IXRTargetFilter targetFilter { get; set; }
Property Value
Type Description
IXRTargetFilter
See Also

targetPriorityMode

Specifies how many Interactables should be monitored in the targetsForSelection property.

Declaration
public virtual TargetPriorityMode targetPriorityMode { get; set; }
Property Value
Type Description
TargetPriorityMode

targetsForSelection

The Interactables with priority for selection in the current frame, some Interactables might be already selected. This list is sorted by priority (with highest priority first). How many Interactables appear in this list is configured by the targetPriorityMode property.

Declaration
public virtual List<IXRSelectInteractable> targetsForSelection { get; set; }
Property Value
Type Description
List<IXRSelectInteractable>
Remarks

Unity automatically clears and updates this list every frame if targetPriorityMode has a value different from None, in this case a valid list must be returned.

Methods

Awake()

See MonoBehaviour.

Declaration
protected virtual void Awake()

CanHover(IXRHoverInteractable)

Determines if the Interactable is valid for hover this frame.

Declaration
public virtual bool CanHover(IXRHoverInteractable interactable)
Parameters
Type Name Description
IXRHoverInteractable interactable

Interactable to check.
Returns
Type Description
bool

Returns true if the Interactable can be hovered over this frame.
See Also

CanSelect(IXRSelectInteractable)

Determines if the Interactable is valid for selection this frame.

Declaration
public virtual bool CanSelect(IXRSelectInteractable interactable)
Parameters
Type Name Description
IXRSelectInteractable interactable

Interactable to check.
Returns
Type Description
bool

Returns true if the Interactable can be selected this frame.
See Also

CaptureAttachPose(IXRSelectInteractable)

Capture the current Attach Transform pose. This method is automatically called by Unity to capture the pose during the moment of selection.

Declaration
protected void CaptureAttachPose(IXRSelectInteractable interactable)
Parameters
Type Name Description
IXRSelectInteractable interactable

The specific Interactable as context to get the attachment point for.
Remarks

Unity automatically calls this method during OnSelectEntering(SelectEnterEventArgs) and should not typically need to be called by a user.

See Also

CreateAttachTransform()

Create a new child GameObject to use as the attach transform if one is not set.

Declaration
protected void CreateAttachTransform()
See Also

EndManualInteraction()

Ends the manually initiated selection of an Interactable.

Declaration
public virtual void EndManualInteraction()
See Also

GetAttachPoseOnSelect(IXRSelectInteractable)

Gets the world position and rotation of the Attach Transform captured during the moment of selection.

Declaration
public Pose GetAttachPoseOnSelect(IXRSelectInteractable interactable)
Parameters
Type Name Description
IXRSelectInteractable interactable

The specific Interactable as context to get the attachment point for.
Returns
Type Description
Pose

Returns the world pose of the attachment point during the moment of selection, and otherwise the identity Pose if it was not selected during the current selection stack.
See Also

GetAttachTransform(IXRInteractable)

Gets the Transform that is used as the attachment point for a given Interactable.

Declaration
public virtual Transform GetAttachTransform(IXRInteractable interactable)
Parameters
Type Name Description
IXRInteractable interactable

The specific Interactable as context to get the attachment point for.
Returns
Type Description
Transform

Returns the attachment point Transform.
Remarks

This should typically return the Transform of a child GameObject or the transform itself.

See Also

GetInteractionStrength(IXRInteractable)

Gets the interaction strength between the given interactable and this interactor.

Declaration
public float GetInteractionStrength(IXRInteractable interactable)
Parameters
Type Name Description
IXRInteractable interactable

The specific interactable to get the interaction strength between.
Returns
Type Description
float

Returns a value [0.0, 1.0] of the interaction strength.

GetLocalAttachPoseOnSelect(IXRSelectInteractable)

Gets the local position and rotation of the Attach Transform captured during the moment of selection.

Declaration
public Pose GetLocalAttachPoseOnSelect(IXRSelectInteractable interactable)
Parameters
Type Name Description
IXRSelectInteractable interactable

The specific Interactable as context to get the attachment point for.
Returns
Type Description
Pose

Returns the local pose of the attachment point during the moment of selection, and otherwise the identity Pose if it was not selected during the current selection stack.
See Also

GetValidTargets(List<IXRInteractable>)

Retrieve the list of Interactables that this Interactor could possibly interact with this frame. This list is sorted by priority (with highest priority first).

Declaration
public virtual void GetValidTargets(List<IXRInteractable> targets)
Parameters
Type Name Description
List<IXRInteractable> targets

The results list to populate with Interactables that are valid for selection or hover.
Remarks

When implementing this method, Unity expects you to clear targets before adding to it.

IsHovering(IXRHoverInteractable)

Determines whether this Interactor is currently hovering the Interactable.

Declaration
public bool IsHovering(IXRHoverInteractable interactable)
Parameters
Type Name Description
IXRHoverInteractable interactable

Interactable to check.
Returns
Type Description
bool

Returns true if this Interactor is currently hovering the Interactable. Otherwise, returns .
Remarks

In other words, returns whether interactablesHovered contains interactable.

See Also

IsHovering(IXRInteractable)

Determines whether this Interactor is currently hovering the Interactable.

Declaration
protected bool IsHovering(IXRInteractable interactable)
Parameters
Type Name Description
IXRInteractable interactable

Interactable to check.
Returns
Type Description
bool

Returns true if this Interactor is currently hovering the Interactable. Otherwise, returns .
Remarks

In other words, returns whether interactablesHovered contains interactable.

See Also

IsSelecting(IXRInteractable)

Determines whether this Interactor is currently selecting the Interactable.

Declaration
protected bool IsSelecting(IXRInteractable interactable)
Parameters
Type Name Description
IXRInteractable interactable

Interactable to check.
Returns
Type Description
bool

Returns true if this Interactor is currently selecting the Interactable. Otherwise, returns .
Remarks

In other words, returns whether interactablesSelected contains interactable.

See Also

IsSelecting(IXRSelectInteractable)

Determines whether this Interactor is currently selecting the Interactable.

Declaration
public bool IsSelecting(IXRSelectInteractable interactable)
Parameters
Type Name Description
IXRSelectInteractable interactable

Interactable to check.
Returns
Type Description
bool

Returns true if this Interactor is currently selecting the Interactable. Otherwise, returns .
Remarks

In other words, returns whether interactablesSelected contains interactable.

See Also

OnDestroy()

See MonoBehaviour.

Declaration
protected virtual void OnDestroy()

OnDisable()

See MonoBehaviour.

Declaration
protected virtual void OnDisable()

OnEnable()

See MonoBehaviour.

Declaration
protected virtual void OnEnable()

OnHoverEntered(HoverEnterEventArgs)

The XRInteractionManager calls this method when the Interactor first initiates hovering over an Interactable in a second pass.

Declaration
protected virtual void OnHoverEntered(HoverEnterEventArgs args)
Parameters
Type Name Description
HoverEnterEventArgs args

Event data containing the Interactable that is being hovered over.
Remarks

args is only valid during this method call, do not hold a reference to it.

See Also

OnHoverEntering(HoverEnterEventArgs)

The XRInteractionManager calls this method right before the Interactor first initiates hovering over an Interactable in a first pass.

Declaration
protected virtual void OnHoverEntering(HoverEnterEventArgs args)
Parameters
Type Name Description
HoverEnterEventArgs args

Event data containing the Interactable that is being hovered over.
Remarks

args is only valid during this method call, do not hold a reference to it.

See Also

OnHoverExited(HoverExitEventArgs)

The XRInteractionManager calls this method when the Interactor ends hovering over an Interactable in a second pass.

Declaration
protected virtual void OnHoverExited(HoverExitEventArgs args)
Parameters
Type Name Description
HoverExitEventArgs args

Event data containing the Interactable that is no longer hovered over.
Remarks

args is only valid during this method call, do not hold a reference to it.

See Also

OnHoverExiting(HoverExitEventArgs)

The XRInteractionManager calls this method right before the Interactor ends hovering over an Interactable in a first pass.

Declaration
protected virtual void OnHoverExiting(HoverExitEventArgs args)
Parameters
Type Name Description
HoverExitEventArgs args

Event data containing the Interactable that is no longer hovered over.
Remarks

args is only valid during this method call, do not hold a reference to it.

See Also

OnRegistered(InteractorRegisteredEventArgs)

The XRInteractionManager calls this method when this Interactor is registered with it.

Declaration
protected virtual void OnRegistered(InteractorRegisteredEventArgs args)
Parameters
Type Name Description
InteractorRegisteredEventArgs args

Event data containing the Interaction Manager that registered this Interactor.
Remarks

args is only valid during this method call, do not hold a reference to it.

See Also

OnSelectEntered(SelectEnterEventArgs)

The XRInteractionManager calls this method when the Interactor first initiates selection of an Interactable in a second pass.

Declaration
protected virtual void OnSelectEntered(SelectEnterEventArgs args)
Parameters
Type Name Description
SelectEnterEventArgs args

Event data containing the Interactable that is being selected.
Remarks

args is only valid during this method call, do not hold a reference to it.

See Also

OnSelectEntering(SelectEnterEventArgs)

The XRInteractionManager calls this method right before the Interactor first initiates selection of an Interactable in a first pass.

Declaration
protected virtual void OnSelectEntering(SelectEnterEventArgs args)
Parameters
Type Name Description
SelectEnterEventArgs args

Event data containing the Interactable that is being selected.
Remarks

args is only valid during this method call, do not hold a reference to it.

See Also

OnSelectExited(SelectExitEventArgs)

The XRInteractionManager calls this method when the Interactor ends selection of an Interactable in a second pass.

Declaration
protected virtual void OnSelectExited(SelectExitEventArgs args)
Parameters
Type Name Description
SelectExitEventArgs args

Event data containing the Interactable that is no longer selected.
Remarks

args is only valid during this method call, do not hold a reference to it.

See Also

OnSelectExiting(SelectExitEventArgs)

The XRInteractionManager calls this method right before the Interactor ends selection of an Interactable in a first pass.

Declaration
protected virtual void OnSelectExiting(SelectExitEventArgs args)
Parameters
Type Name Description
SelectExitEventArgs args

Event data containing the Interactable that is no longer selected.
Remarks

args is only valid during this method call, do not hold a reference to it.

See Also

OnUnregistered(InteractorUnregisteredEventArgs)

The XRInteractionManager calls this method when this Interactor is unregistered from it.

Declaration
protected virtual void OnUnregistered(InteractorUnregisteredEventArgs args)
Parameters
Type Name Description
InteractorUnregisteredEventArgs args

Event data containing the Interaction Manager that unregistered this Interactor.
Remarks

args is only valid during this method call, do not hold a reference to it.

See Also

PreprocessInteractor(UpdatePhase)

The XRInteractionManager or containing IXRInteractionGroup calls this method to update the Interactor before interaction events occur. Interactors should use this method to do tasks like determine their valid targets.

Declaration
public virtual void PreprocessInteractor(XRInteractionUpdateOrder.UpdatePhase updatePhase)
Parameters
Type Name Description
XRInteractionUpdateOrder.UpdatePhase updatePhase

The update phase this is called during.
Remarks

Please see the XRInteractionManager and XRInteractionUpdateOrder.UpdatePhase documentation for more details on update order.

See Also

ProcessHoverFilters(IXRHoverInteractable)

Returns the processing value of the filters in hoverFilters for this Interactor and the given Interactable.

Declaration
protected bool ProcessHoverFilters(IXRHoverInteractable interactable)
Parameters
Type Name Description
IXRHoverInteractable interactable

The Interactable to be validated by the hover filters.
Returns
Type Description
bool

Returns true if all processed filters also return true, or if hoverFilters is empty. Otherwise, returns false.

ProcessInteractionStrength(UpdatePhase)

The XRInteractionManager calls this method to signal to update the interaction strength.

Declaration
protected virtual void ProcessInteractionStrength(XRInteractionUpdateOrder.UpdatePhase updatePhase)
Parameters
Type Name Description
XRInteractionUpdateOrder.UpdatePhase updatePhase

The update phase during which this method is called.
See Also

ProcessInteractor(UpdatePhase)

The XRInteractionManager or containing IXRInteractionGroup calls this method to update the Interactor after interaction events occur.

Declaration
public virtual void ProcessInteractor(XRInteractionUpdateOrder.UpdatePhase updatePhase)
Parameters
Type Name Description
XRInteractionUpdateOrder.UpdatePhase updatePhase

The update phase this is called during.
Remarks

Please see the XRInteractionManager and XRInteractionUpdateOrder.UpdatePhase documentation for more details on update order.

See Also

ProcessSelectFilters(IXRSelectInteractable)

Returns the processing value of the filters in selectFilters for this Interactor and the given Interactable.

Declaration
protected bool ProcessSelectFilters(IXRSelectInteractable interactable)
Parameters
Type Name Description
IXRSelectInteractable interactable

The Interactor to be validated by the select filters.
Returns
Type Description
bool

Returns true if all processed filters also return true, or if selectFilters is empty. Otherwise, returns false.

Reset()

See MonoBehaviour.

Declaration
[Conditional("UNITY_EDITOR")]
protected virtual void Reset()

Start()

See MonoBehaviour.

Declaration
protected virtual void Start()

StartManualInteraction(IXRSelectInteractable)

Manually initiate selection of an Interactable.

Declaration
public virtual void StartManualInteraction(IXRSelectInteractable interactable)
Parameters
Type Name Description
IXRSelectInteractable interactable

Interactable that is being selected.
See Also

Events

registered

Calls the methods in its invocation list when this Interactor is registered with an Interaction Manager.

Declaration
public event Action<InteractorRegisteredEventArgs> registered
Event Type
Type Description
Action<InteractorRegisteredEventArgs>
Remarks

The InteractorRegisteredEventArgs passed to each listener is only valid while the event is invoked, do not hold a reference to it.

See Also

unregistered

Calls the methods in its invocation list when this Interactor is unregistered from an Interaction Manager.

Declaration
public event Action<InteractorUnregisteredEventArgs> unregistered
Event Type
Type Description
Action<InteractorUnregisteredEventArgs>
Remarks

The InteractorUnregisteredEventArgs passed to each listener is only valid while the event is invoked, do not hold a reference to it.

See Also

Implements

Extension Methods