Class XRAnchorSubsystem.Provider

An interface to be implemented by providers of this subsystem.

Inheritance

XRAnchorSubsystem.Provider

Namespace: UnityEngine.XR.ARSubsystems

Syntax

protected abstract class Provider

Methods

Destroy()

Called when Destroy is called on the subsystem.

Declaration

public virtual void Destroy()

GetChanges(XRAnchor, Allocator)

Invoked to get the changes to anchors (added, updated, and removed) since the last call to .

Declaration

public abstract TrackableChanges<XRAnchor> GetChanges(XRAnchor defaultAnchor, Allocator allocator)

Parameters

Type	Name	Description
XRAnchor	defaultAnchor	The default anchor. This should be used to initialize the returned `NativeArray`s for backwards compatibility. See TrackableChanges(Void, Int32, Void, Int32, Void*, Int32, T, Int32, Allocator).
Allocator	allocator	An allocator to use for the `NativeArray`s in TrackableChanges<T>.

Returns

Type	Description
TrackableChanges<XRAnchor>	Changes since the last call to GetChanges(XRAnchor, Allocator).

Start()

Invoked when Start is called on the subsystem. This method is only called if the subsystem was not previously running.

Declaration

public virtual void Start()

Stop()

Invoked when Stop is called on the subsystem. This method is only called if the subsystem was previously running.

Declaration

public virtual void Stop()

TryAddAnchor(Pose, out XRAnchor)

Should create a new anchor with the provide pose.

Declaration

public virtual bool TryAddAnchor(Pose pose, out XRAnchor anchor)

Parameters

Type	Name	Description
Pose	pose	The pose, in session space, of the new anchor.
XRAnchor	anchor	The new anchor. Must be valid only if this method returns `true`.

Returns

Type	Description
Boolean	Should return `true` if the new anchor was added, otherwise `false`.

TryAttachAnchor(TrackableId, Pose, out XRAnchor)

Should create a new anchor "attached" to the trackable with id trackableToAffix. The behavior of the anchor depends on the type of trackable to which this anchor is attached and may be implemenation-defined.

Declaration

public virtual bool TryAttachAnchor(TrackableId trackableToAffix, Pose pose, out XRAnchor anchor)

Parameters

Type	Name	Description
TrackableId	trackableToAffix	The id of the trackable to which to attach.
Pose	pose	The pose, in session space, of the anchor to create.
XRAnchor	anchor	The new anchor. Must be valid only if this method returns `true`.

Returns

Type	Description
Boolean	`true` if the new anchor was added, otherwise `false`.

TryRemoveAnchor(TrackableId)

Should remove an existing anchor with TrackableId anchorId.

Declaration

public virtual bool TryRemoveAnchor(TrackableId anchorId)

Parameters

Type	Name	Description
TrackableId	anchorId	The id of an existing anchor to remove.

Returns

Type	Description
Boolean	Should return `true` if the anchor was removed, otherwise `false`. If the anchor does not exist, return `false`.