SpatialSurfaceObserver.GetObservedSurfaces Method
Definition
Important
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Gets metadata for the set of surfaces observed within the bounding volume at the moment.
public:
virtual IMapView<Platform::Guid, SpatialSurfaceInfo ^> ^ GetObservedSurfaces() = GetObservedSurfaces;IMapView<winrt::guid, SpatialSurfaceInfo const&> GetObservedSurfaces();public IReadOnlyDictionary<Guid,SpatialSurfaceInfo> GetObservedSurfaces();function getObservedSurfaces()Public Function GetObservedSurfaces () As IReadOnlyDictionary(Of Guid, SpatialSurfaceInfo)Returns
The observed surfaces within the bounding volume. If no bounding volume has been set, no surfaces will be returned.
Windows requirements
| App capabilities |
spatialPerception
|
Remarks
Each SpatialSurfaceInfo snapshot is immutable, so you can compare their values later to see if a given surface has recently experienced a mesh update.
Correlating the Id and UpdateTime properties across multiple observations lets you identify new mesh, updated mesh and removed mesh:
- If you see a SpatialSurfaceInfo with an Id you haven't seen before, treat it as new mesh.
- If you see a SpatialSurfaceInfo with a known Id, but with a new UpdateTime, treat it as updated mesh.
- If you no longer see a SpatialSurfaceInfo with a known Id, treat it as removed mesh.