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impl fn to computer bazpath loose bbox

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indierusty
2025-08-06 08:04:43 +05:30
parent 836a110c72
commit 018e0968fc
1 changed files with 17 additions and 1 deletions
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18
node-graph/gcore/src/vector/misc.rs
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@@ -4,7 +4,7 @@ use crate::vector::{SegmentId, Vector};
use bezier_rs::{BezierHandles, ManipulatorGroup, Subpath};
use dyn_any::DynAny;
use glam::DVec2;
use kurbo::{BezPath, CubicBez, Line, ParamCurve, PathSeg, Point, QuadBez};
use kurbo::{BezPath, CubicBez, Line, ParamCurve, PathSeg, Point, QuadBez, Rect};
use std::ops::Sub;
/// Represents different ways of calculating the centroid.
@@ -204,6 +204,22 @@ pub fn bezpath_to_manipulator_groups(bezpath: &BezPath) -> (Vec<ManipulatorGroup
(manipulator_groups, is_closed)
}
fn pathseg_to_points(segment: PathSeg) -> [Option<Point>; 4] {
match segment {
PathSeg::Line(line) => [Some(line.p0), None, None, Some(line.p1)],
PathSeg::Quad(quad_bez) => [Some(quad_bez.p0), None, Some(quad_bez.p1), Some(quad_bez.p2)],
PathSeg::Cubic(cubic_bez) => [Some(cubic_bez.p0), Some(cubic_bez.p1), Some(cubic_bez.p2), Some(cubic_bez.p3)],
}
}
fn bezpath_loose_bounding_box(bezpath: &BezPath) -> Rect {
let expand = |bbox: Rect, point: Point| Rect::new(bbox.x0.min(point.x), bbox.y0.min(point.y), bbox.x1.max(point.x), bbox.y1.max(point.y));
bezpath.segments().fold(Rect::new(0., 0., 0., 0.), |bbox, segment| {
pathseg_to_points(segment).into_iter().filter_map(|point| point).fold(bbox, |bbox, point| expand(bbox, point))
})
}
/// Returns true if the [`PathSeg`] is equivalent to a line.
///
/// This is different from simply checking if the segment is [`PathSeg::Line`] or [`PathSeg::Quad`] or [`PathSeg::Cubic`]. Bezier curve can also be a line if the control points are colinear to the start and end points. Therefore if the handles exceed the start and end point, it will still be considered as a line.