# XRVps2AssetSubsystem

Source: https://www.nianticspatial.com/docs/api/unity/NianticSpatial.NSDK.AR.XRSubsystems.XRVps2AssetSubsystem/

XRVps2AssetSubsystem
> extends UnityEngine.XR.ARSubsystems.TrackingSubsystem
A tracking subsystem serving the origins of VPS assets as trackables.

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## Declaration

public class XRVps2AssetSubsystem : TrackingSubsystem<XRVps2Asset, XRVps2AssetSubsystem, XRVps2AssetSubsystemDescriptor, Provider>

## Remarks

The asset the device is localized to (the localized asset of
GetLatestLocalization) is tracked automatically;
other assets known to the session can be requested with
TryTrackAsset. An asset appears in the changes once its origin is
first tracked, and afterwards degrades to TrackingState.Limited with its
last known pose rather than being removed. Poses are in AR session space.

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## Methods

| Name | Type | Summary |
| --- | --- | --- |
| GetChanges | TrackableChanges<XRVps2Asset> | Get the changes (added, updated, and removed) to tracked assets since the last call to this method. |
| TryTrackAsset | bool | Requests tracking of a VPS map asset's origin, identified by its asset ID. |

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## Relationships

derived:  NsdkVps2AssetSubsystem