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#1144: Live Corners round corners between curved segments too

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A corner is now any anchor that isn't smooth where two sides meet at an
angle, straight or curved, as in Illustrator. The cut meets each side at
its setback measured along the curve, leaves both sides along their
tangents there, and each curved side is trimmed to what the cuts at its
ends leave of it. The largest radius is still the one taking the cut
halfway along the shorter side, measured along the curve. Corners
between straight sides draw exactly as before.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
bflatastic
2026-10-11 16:14:08 +07:00
co-authored by Claude Opus 5.5
parent b08482d640
commit fbc1c494b2
15 changed files with 208 additions and 66 deletions
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crates/tools/src/corners.rs
+4 -4
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@@ -1,6 +1,6 @@
//! Live Corners: the widgets inside the corners of the selected paths. The Selection tool shows
//! them on live rectangles and polygons, Direct Selection on any path (a star, a pen path) at each
//! corner anchor: one without handles between two straight sides. Dragging one rounds (or
//! corner anchor: one that isn't smooth, where two sides, straight or curved, meet at an angle. Dragging one rounds (or
//! sharpens) the corners whose widgets show together, on every selected path (#938): every corner
//! of a path selected whole, those with a selected anchor when Direct Selection picked some. Alt-clicking a widget cycles their corner
//! kind (round, inverted round, chamfer); double-clicking one opens the Corners dialog. The
@@ -701,7 +701,7 @@ mod tests {
assert!(red, "six arcs at the limit");
}
/// A pen path's middle corner shows a widget; its ends and curved corners don't.
/// A pen path's corners show widgets, curved ones too (#1144); its ends don't.
#[test]
fn a_pen_path_shows_widgets_on_its_corners_only() {
let mut sp = vectorcraft_geom::SubPath::polyline(
@@ -713,7 +713,7 @@ mod tests {
let s = selected(id);
let p = paint();
let w = CornerWidgets::for_tool(&cx(&d, &s, &p), true).unwrap();
assert_eq!(w.corners(), [1]);
assert_eq!(pts(&w), [Point::new(290.0, 110.0)]);
assert_eq!(w.corners(), [1, 2]);
assert_eq!(pts(&w)[0], Point::new(290.0, 110.0));
}
}