1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
//! Identify which catalogued sky objects a telescope frame covers, given a
//! pointing (right ascension / declination) and a field of view (derived from
//! optics, or supplied directly).
//!
//! A caller-supplied set of catalogue objects is ranked by angular separation
//! from the pointing; objects inside the frame's membership shape are flagged.
//! Matching uses sky position only — a designation may ride along on a result
//! for display, but it never influences the match.
//!
//! The crate holds no catalogue data and performs no I/O. A consumer supplies
//! its own objects — from a database, a file, a name resolver, or a hand-built
//! list — by implementing the [`matcher`] module's `SkyObject` trait.
//!
//! Coordinate and angle types come from the [`skymath`] crate and appear
//! directly in this crate's signatures: construct positions with
//! [`skymath::Equatorial`] and angles with [`skymath::Angle`]. The crate is
//! re-exported as `target_match::skymath` so consumers can name a
//! version-matched `skymath` without a separate dependency entry.
//!
//! # Modules
//!
//! - [`optics`] — plate scale and field-of-view geometry from focal length,
//! pixel size (x/y), binning (x/y), and sensor dimensions — or a directly
//! supplied pixel scale / field of view — plus the search-radius policies.
//! - [`matcher`] — the `SkyObject` input trait, match constraints (radius,
//! rectangular field of view, nearest-N), and deterministic ranking.
//!
//! # Example
//!
//! ```
//! use skymath::{Angle, Equatorial, ParseMode};
//! use target_match::{rank, Constraint, Field, Optics, RadiusPolicy, SkyObject};
//!
//! struct Target { name: &'static str, ra: f64, dec: f64 }
//! impl SkyObject for Target {
//! fn position(&self) -> Equatorial {
//! Equatorial::j2000(Angle::from_degrees(self.ra), Angle::from_degrees(self.dec)).unwrap()
//! }
//! }
//!
//! let catalog = [
//! Target { name: "M 31", ra: 10.6847, dec: 41.2688 },
//! Target { name: "M 33", ra: 23.4621, dec: 30.6599 },
//! ];
//! let pointing = Equatorial::parse_j2000("00:42:44.3", "+41:16:09", ParseMode::Strict).unwrap();
//! let field = Field::from_optics(Optics {
//! focal_mm: 800.0, pixel_um: (3.76, 3.76), binning: (1, 1), pixels: (6248, 4176),
//! }).unwrap();
//!
//! let hits = rank(pointing, &catalog, Constraint::within(&field, RadiusPolicy::Circumscribed).nearest_one());
//! assert_eq!(hits[0].object.name, "M 31");
//! ```
/// The astronomy-math crate whose types appear in this crate's public API,
/// re-exported so consumers can use the exact version target-match was built
/// against.
pub use skymath;
pub use ;
pub use ;
pub use ;