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Allow rotation of rectangles and ellipses (#7682)

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Added the ability to rotate rectangles and ellipses. Similar to the
existing text implementation

* [x ] I have followed the instructions in the PR template
This commit is contained in:
Ryan Bluth
2026-03-24 08:58:02 -04:00
committed by GitHub
parent 1e4619c5ef
commit 5d5f0dedcc
8 changed files with 208 additions and 5 deletions
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20
crates/epaint/src/tessellator.rs
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@@ -1546,6 +1546,7 @@ impl Tessellator {
radius,
fill,
stroke,
angle,
} = shape;
if radius.x <= 0.0 || radius.y <= 0.0 {
@@ -1596,6 +1597,14 @@ impl Tessellator {
points.push(center + Vec2::new(0.0, -radius.y));
points.extend(quarter.iter().rev().map(|p| center + Vec2::new(p.x, -p.y)));
// Apply rotation if angle is non-zero
if angle != 0.0 {
let rot = emath::Rot2::from_angle(angle);
for point in &mut points {
*point = center + rot * (*point - center);
}
}
let path_stroke = PathStroke::from(stroke).outside();
self.scratchpad_path.clear();
self.scratchpad_path.add_line_loop(&points);
@@ -1773,6 +1782,7 @@ impl Tessellator {
round_to_pixels,
mut blur_width,
brush: _, // brush is extracted on its own, because it is not Copy
angle,
} = *rect_shape;
let mut corner_radius = CornerRadiusF32::from(corner_radius);
@@ -1940,6 +1950,16 @@ impl Tessellator {
let path = &mut self.scratchpad_path;
path.clear();
path::rounded_rectangle(&mut self.scratchpad_points, rect, corner_radius);
// Apply rotation if angle is non-zero
if angle != 0.0 {
let rot = emath::Rot2::from_angle(angle);
let center = rect.center();
for point in &mut self.scratchpad_points {
*point = center + rot * (*point - center);
}
}
path.add_line_loop(&self.scratchpad_points);
let path_stroke = PathStroke::from(stroke).with_kind(stroke_kind);