sightloom_core/
event.rs

1//! Compact public event vocabulary for zone monitors.
2
3use crate::{TrackId, ZoneId};
4
5/// The direction in which a track crossed a directed line segment.
6#[derive(Clone, Copy, Debug, Eq, PartialEq)]
7pub enum Direction {
8    /// The track moved from the line's algebraic left half-plane to its right.
9    LeftToRight,
10    /// The track moved from the line's algebraic right half-plane to its left.
11    RightToLeft,
12}
13
14/// A membership or crossing transition observed for a track and zone.
15#[derive(Clone, Copy, Debug, Eq, PartialEq)]
16pub enum VisionEvent {
17    /// A track entered a polygon zone.
18    Entered {
19        /// The track that entered.
20        track_id: TrackId,
21        /// The polygon zone that was entered.
22        zone_id: ZoneId,
23    },
24    /// A track exited a polygon zone.
25    Exited {
26        /// The track that exited.
27        track_id: TrackId,
28        /// The polygon zone that was exited.
29        zone_id: ZoneId,
30    },
31    /// A track crossed a finite line zone.
32    Crossed {
33        /// The track that crossed.
34        track_id: TrackId,
35        /// The line zone that was crossed.
36        zone_id: ZoneId,
37        /// The crossing direction relative to the directed line segment.
38        direction: Direction,
39    },
40}
sightloom_core/event.rs

sightloom_core/
event.rs
