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TemporalAccess

nv_perception::temporal_access

Trait TemporalAccess 

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pub trait TemporalAccess: Send + Sync {
    // Required methods
    fn view_epoch(&self) -> ViewEpoch;
    fn track_count(&self) -> usize;
    fn track_ids(&self) -> Vec<TrackId>;
    fn get_track(&self, id: &TrackId) -> Option<&Track>;
    fn recent_observations(&self, id: &TrackId) -> &[TrackObservation];
    fn first_seen(&self, id: &TrackId) -> Option<MonotonicTs>;
    fn last_seen(&self, id: &TrackId) -> Option<MonotonicTs>;
    fn trajectory_point_count(&self, id: &TrackId) -> usize;
    fn trajectory_segment_count(&self, id: &TrackId) -> usize;
}
Expand description

Read-only access to temporal state for stages.

Implemented by nv_temporal::TemporalStoreSnapshot. The runtime passes a &dyn TemporalAccess through StageContext::temporal.

Stages that need track history, observation windows, or view-epoch context program against this trait, keeping them decoupled from the concrete temporal store implementation.

Required Methods§

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fn view_epoch(&self) -> ViewEpoch

View epoch at the time this snapshot was taken.

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fn track_count(&self) -> usize

Number of tracks in the snapshot.

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fn track_ids(&self) -> Vec<TrackId>

All track IDs in the snapshot.

The order is unspecified. Callers that need a stable iteration order should collect and sort.

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fn get_track(&self, id: &TrackId) -> Option<&Track>

Look up a track’s current state by ID.

Returns None if the track is not present in the snapshot.

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fn recent_observations(&self, id: &TrackId) -> &[TrackObservation]

Return the most recent observations for a track, ordered oldest-first.

Returns an empty slice if the track is not present or has no recorded observations.

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fn first_seen(&self, id: &TrackId) -> Option<MonotonicTs>

Timestamp when a track was first seen.

Returns None if the track is not present.

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fn last_seen(&self, id: &TrackId) -> Option<MonotonicTs>

Timestamp of the most recent observation for a track.

Returns None if the track is not present.

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fn trajectory_point_count(&self, id: &TrackId) -> usize

Total trajectory points for a track across all segments.

Returns 0 if the track is not present.

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fn trajectory_segment_count(&self, id: &TrackId) -> usize

Number of trajectory segments for a track.

Returns 0 if the track is not present.

Implementors§