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Use a coarse bounding box to avoid a detailed check for intersection when clicking artwork (#1887)

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* Add bounding box check for intersection

* Cache the bounding box

* private subpath
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James Lindsay 2024-08-03 15:10:04 +01:00 • committed by GitHub
parent 32f5fba3e3
commit ea44d1440a
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5 changed files with 65 additions and 27 deletions
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21
libraries/bezier-rs/src/subpath/solvers.rs
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@ -276,6 +276,27 @@ impl<PointId: crate::Identifier> Subpath<PointId> {
.reduce(|bbox1, bbox2| [bbox1[0].min(bbox2[0]), bbox1[1].max(bbox2[1])])
}
/// Return the min and max corners that represent the loose bounding box of the subpath (bounding box of all handles and anchors).
pub fn loose_bounding_box(&self) -> Option<[DVec2; 2]> {
self.manipulator_groups
.iter()
.flat_map(|group| [group.in_handle, group.out_handle, Some(group.anchor)])
.flatten()
.map(|pos| [pos, pos])
.reduce(|bbox1, bbox2| [bbox1[0].min(bbox2[0]), bbox1[1].max(bbox2[1])])
}
/// Return the min and max corners that represent the loose bounding box of the subpath, after a given affine transform.
pub fn loose_bounding_box_with_transform(&self, transform: glam::DAffine2) -> Option<[DVec2; 2]> {
self.manipulator_groups
.iter()
.flat_map(|group| [group.in_handle, group.out_handle, Some(group.anchor)])
.flatten()
.map(|pos| transform.transform_point2(pos))
.map(|pos| [pos, pos])
.reduce(|bbox1, bbox2| [bbox1[0].min(bbox2[0]), bbox1[1].max(bbox2[1])])
}
/// Returns list of `t`-values representing the inflection points of the subpath.
/// The list of `t`-values returned are filtered such that they fall within the range `[0, 1]`.
/// <iframe frameBorder="0" width="100%" height="300px" src="https://graphite.rs/libraries/bezier-rs#subpath/inflections/solo" title="Inflections Demo"></iframe>