Navigation API

Commands: StartNavigation(DestinationPoiId), NavigateToPoi(Destination), StopNavigation, ContinueToNextSection and RefreshPointsOfInterest. Snapshots: GetPointsOfInterest and GetNavigationState. FGraffityARPOI includes Id, Name, PlaceId, SectionId and canonical MapPositionMetres. FGraffityARNavigationState includes bNavigating, bLoading, bWaitingForContinuation, DestinationPoiId, DestinationSectionId, RemainingMetres, Action, MapLocalRoute and LastError. Routes are local Unreal map-root coordinates; POI input is canonical metres.