# XRVps2AnchorSubsystem

Source: https://www.nianticspatial.com/docs/api/unity/NianticSpatial.NSDK.AR.XRSubsystems.XRVps2AnchorSubsystem/

XRVps2AnchorSubsystem
> extends UnityEngine.XR.ARSubsystems.TrackingSubsystem
A tracking subsystem serving VPS2 anchors as trackables.

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## Declaration

public class XRVps2AnchorSubsystem : TrackingSubsystem<XRVps2Anchor, XRVps2AnchorSubsystem, XRVps2AnchorSubsystemDescriptor, Provider>

## Remarks

The VPS2 feature's lifecycle is owned by XRVps2Subsystem; this
subsystem only creates, tracks, and removes anchors against it. Poses are in AR
session space.

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## Methods

| Name | Type | Summary |
| --- | --- | --- |
| GetAnchorPayload | bool | Get the payload which encodes the anchor. The payload can be used to re-track the anchor in a different VPS2 session. |
| GetChanges | TrackableChanges<XRVps2Anchor> | Get the changes (added, updated, and removed) to anchors since the last call to this method. |
| TryCreateAnchor | bool | Create a new anchor located at pose in the device's AR tracking space. |
| TryRemoveAnchor | bool | Stop tracking an anchor. The anchor surfaces one removed change through GetChanges before it is forgotten. |
| TryTrackAnchor | bool | Start tracking the anchor encoded by anchorPayload. |

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## Relationships

derived:  NsdkVps2AnchorSubsystem