Class ARAnchorManager
Manages anchors.
Inheritance
Inherited Members
Namespace: UnityEngine.XR.ARFoundation
Syntax
[DefaultExecutionOrder(-2147483647)]
[DisallowMultipleComponent]
[RequireComponent(typeof(ARSessionOrigin))]
[HelpURL("https://docs.unity3d.com/Packages/com.unity.xr.arfoundation@4.0/api/UnityEngine.XR.ARFoundation.ARAnchorManager.html")]
public sealed class ARAnchorManager : ARTrackableManager<XRAnchorSubsystem, XRAnchorSubsystemDescriptor, XRAnchor, ARAnchor>Remarks
Use this component to programmatically add, remove, or query for
anchors. Anchors are Poses in the world
which will be periodically updated by an AR device as its understanding
of the world changes.
Subscribe to changes (added, updated, and removed) via the anchorsChanged event.
Properties
anchorPrefab
This prefab will be instantiated for each ARAnchor. May be null.
Declaration
public GameObject anchorPrefab { get; set; }Property Value
| Type | Description |
|---|---|
| GameObject |
Remarks
The purpose of this property is to extend the functionality of ARAnchors. It is not the recommended way to instantiate content associated with an ARAnchor. See Anchoring content for more details.
gameObjectName
The name to assign to the GameObject instantiated for each ARAnchor.
Declaration
protected override string gameObjectName { get; }Property Value
| Type | Description |
|---|---|
| String |
Overrides
Methods
AddAnchor(Pose)
Attempts to add an ARAnchor with the given Pose.
Declaration
public ARAnchor AddAnchor(Pose pose)Parameters
| Type | Name | Description |
|---|---|---|
| Pose | pose | The pose, in Unity world space, of the ARAnchor. |
Returns
| Type | Description |
|---|---|
| ARAnchor | A new ARAnchor if successful, otherwise |
Remarks
If GetPrefab()
is not null, a new instance of that prefab will be instantiated. Otherwise, a
new GameObject will be created. In either case, the resulting
GameObject will have an ARAnchor component on it.
Exceptions
| Type | Condition |
|---|---|
| InvalidOperationException | Thrown if this |
| InvalidOperationException | Thrown if the underlying subsystem is |
AttachAnchor(ARPlane, Pose)
Attempts to create a new anchor that is attached to an existing ARPlane.
Declaration
public ARAnchor AttachAnchor(ARPlane plane, Pose pose)Parameters
| Type | Name | Description |
|---|---|---|
| ARPlane | plane | The ARPlane to which to attach. |
| Pose | pose | The initial |
Returns
| Type | Description |
|---|---|
| ARAnchor | A new ARAnchor if successful, otherwise |
GetAnchor(TrackableId)
Gets the ARAnchor with given trackableId,
or null if it does not exist.
Declaration
public ARAnchor GetAnchor(TrackableId trackableId)Parameters
| Type | Name | Description |
|---|---|---|
| TrackableId | trackableId | The TrackableId of the ARAnchor to retrieve. |
Returns
| Type | Description |
|---|---|
| ARAnchor | The ARAnchor with |
GetPrefab()
Get the prefab to instantiate for each ARAnchor.
Declaration
protected override GameObject GetPrefab()Returns
| Type | Description |
|---|---|
| GameObject | The prefab to instantiate for each ARAnchor. |
Overrides
OnTrackablesChanged(List<ARAnchor>, List<ARAnchor>, List<ARAnchor>)
Invoked when the base class detects trackable changes.
Declaration
protected override void OnTrackablesChanged(List<ARAnchor> added, List<ARAnchor> updated, List<ARAnchor> removed)Parameters
| Type | Name | Description |
|---|---|---|
| List<ARAnchor> | added | The list of added anchors. |
| List<ARAnchor> | updated | The list of updated anchors. |
| List<ARAnchor> | removed | The list of removed anchors. |
Overrides
RemoveAnchor(ARAnchor)
Attempts to remove an ARAnchor.
Declaration
public bool RemoveAnchor(ARAnchor anchor)Parameters
| Type | Name | Description |
|---|---|---|
| ARAnchor | anchor | The anchor you wish to remove. |
Returns
| Type | Description |
|---|---|
| Boolean |
|
Events
anchorsChanged
Invoked once per frame to communicate changes to anchors, including new anchors, the update of existing anchors, and the removal of previously existing anchors.
Declaration
public event Action<ARAnchorsChangedEventArgs> anchorsChangedEvent Type
| Type | Description |
|---|---|
| Action<ARAnchorsChangedEventArgs> |