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Valentin KleinandClaude Opus 5.5
049504a81e
A circle in the aperture replaced the best Nearest candidate without comparing distances, so a closer line drawn earlier lost to it. Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
41 lines
1.7 KiB
Rust
41 lines
1.7 KiB
Rust
//! Nearest (NEA) object snap picks the closest point of all objects in the aperture, whatever
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//! order they were drawn in.
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use cadcraft_engine::Session;
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use cadcraft_engine::doc::Space;
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use cadcraft_engine::geom::Vec2;
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use cadcraft_engine::snap::{self, mode};
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use serde_json::json;
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fn nearest(s: &Session, cursor: Vec2) -> Vec2 {
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let hit = snap::osnap(s.doc().unwrap(), &Space::Model, cursor, 1.0, mode::NEA, None, false).expect("a nearest snap");
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assert_eq!(hit.mode, mode::NEA);
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hit.point
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}
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#[test]
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fn nearest_prefers_the_closer_object_in_any_drawing_order() {
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// A line along y = 0 and a circle whose edge passes y = 0.8 above the cursor at (0, 0.1):
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// the line (0.1 away) is closer than the circle (0.7 away).
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for circle_first in [false, true] {
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let mut s = Session::new();
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let line = || json!({ "points": [[-5, 0], [5, 0]] });
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let circle = || json!({ "center": [0, 3.8], "radius": 3 });
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if circle_first {
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s.execute("circle", &circle()).unwrap();
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s.execute("line", &line()).unwrap();
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} else {
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s.execute("line", &line()).unwrap();
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s.execute("circle", &circle()).unwrap();
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}
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let p = nearest(&s, Vec2::new(0.0, 0.1));
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assert!(p.near(Vec2::new(0.0, 0.0), 1e-6), "circle drawn first: {circle_first}: snapped to {p:?}");
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}
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// And the circle wins where it is the closer one.
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let mut s = Session::new();
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s.execute("circle", &json!({ "center": [0, 3.8], "radius": 3 })).unwrap();
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s.execute("line", &json!({ "points": [[-5, 0], [5, 0]] })).unwrap();
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let p = nearest(&s, Vec2::new(0.0, 0.7));
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assert!(p.near(Vec2::new(0.0, 0.8), 1e-6), "snapped to {p:?}");
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}
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