linebender/kurbo

View on GitHub

A Rust library for manipulating curves

Stars: 1k
Forks: 103
Open beginner issues: 0
Indexed issues: 49

Dominant language: Rust
License: Apache-2.0
Last GitHub push: Jul 23, 2026
Latest indexed: Sep 19, 2026
Contributing guide: No contributing guide
Code of conduct: No code of conduct
Beginner labels: help wanted good first issue
PR merge metrics: No merged PRs in 30d

Beginner friendly Everything

Open All

49 open issues indexed

`simplify_bezpath` samples zero tangents at polyline run endpoints, fitting curves that leave or arrive in arbitrary axis-aligned directions Open

Difficulty 3/5 1-2 days Newbie friendliness 76/100

linebender/kurbo#605 · Opened Aug 15, 2026
`fit_to_bezpath_opt` emits a control point 19 000 units outside the input, and its own error check reports the fit as exact Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

linebender/kurbo#604 · Opened Aug 14, 2026
`fit_to_bezpath_opt` hangs forever in release builds Open

Difficulty 3/5 1-2 days Newbie friendliness 68/100

linebender/kurbo#602 · 4 comments · Opened Aug 13, 2026
fit_to_bezpath_opt panics on a sliver Open

Difficulty 3/5 1-2 days Newbie friendliness 75/100

linebender/kurbo#601 · Opened Aug 12, 2026
`Line`, `QuadBez`, and `CubicBez` `eval` can return NaN at t=0/t=1 instead of the curve's own endpoint Open

Difficulty 2/5 1-3 hours Newbie friendliness 72/100

linebender/kurbo#598 · 1 comment · Opened Jul 26, 2026
Flaky polycool tests Open

Difficulty 2/5 1-3 hours Newbie friendliness 68/100

linebender/kurbo#594 · 5 comments · Opened Jul 14, 2026
Dash iterator zero-length LineTo noise Open

Difficulty 2/5 1-3 hours Newbie friendliness 35/100

linebender/kurbo#577 · Opened May 5, 2026
[stable_dash_order] `stroke::dash` should probably support stable dash order Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

linebender/kurbo#576 · Opened May 5, 2026
`CircleSegment` has unfortunate name Open

Difficulty 5/5 Over a week Newbie friendliness 30/100

linebender/kurbo#564 · 1 comment · Opened Mar 29, 2026
Request: `SuperEllipse` and `SuperEllipticalArc` shapes Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 45/100

linebender/kurbo#551 · Opened Mar 6, 2026
[feature request] Make Cap and Join enums repr(u8) Open

Difficulty 2/5 1-3 hours Newbie friendliness 50/100

linebender/kurbo#546 · 1 comment · Opened Feb 17, 2026
Fillet (round corners) operation Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

linebender/kurbo#538 · 1 comment · Opened Jan 14, 2026
stroke() function with dashed stroke returns first piece last Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

linebender/kurbo#528 · 10 comments · Opened Nov 18, 2025
New stroker can produce NaN paths Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

linebender/kurbo#519 · 3 comments · Opened Oct 17, 2025
(reasonably) efficient `ParamCurveNearest` on `BezPath` Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

linebender/kurbo#437 · 1 comment · Opened Apr 9, 2025
Why are the `Segments` methods private? Open

linebender/kurbo#431 · 4 comments · 1 assignee · Opened Mar 25, 2025
Incorrect cubic bézier flattening of a flat curve with cusps Open

Difficulty 4/5 3-5 days Newbie friendliness 38/100

linebender/kurbo#426 · 1 comment · Opened Mar 18, 2025
Tests that require debug assertions? Open

Difficulty 3/5 1-2 days Newbie friendliness 38/100

linebender/kurbo#424 · 2 comments · Opened Mar 5, 2025
Add "width gradient" similar to brush's color gradient Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

linebender/kurbo#423 · 3 comments · Opened Feb 21, 2025
Funniness with cubic/line intersection (when negative values present?) Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

linebender/kurbo#411 · 2 comments · Opened Jan 9, 2025
Trim path support Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

linebender/kurbo#408 · 1 reaction · Opened Dec 14, 2024
Endless loop when trying to offset certain curve Open

Difficulty 4/5 3-5 days Newbie friendliness 55/100

linebender/kurbo#344 · 4 comments · 1 reaction · Opened Apr 27, 2024
Getting tangents and coordinates of evenly spaced points on kurbo::BezPath Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

linebender/kurbo#338 · 6 comments · Opened Feb 14, 2024
Polygons support Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

linebender/kurbo#335 · 2 reactions · Opened Feb 13, 2024
Rational Bézier curves Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

linebender/kurbo#328 · Opened Jan 11, 2024
Speed up stroke expansion Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

linebender/kurbo#317 · 4 comments · 1 reaction · Opened Oct 12, 2023
Make move_to less strict Open

good first issue help wanted

Difficulty 3/5 1-2 days Newbie friendliness 45/100

linebender/kurbo#303 · 3 comments · Opened Sep 22, 2023
Tracking issue for invariants on BezPath Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

linebender/kurbo#284 · 5 comments · Opened May 18, 2023
Tracking issue for curve fitting robustness Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

linebender/kurbo#279 · 4 comments · Opened May 4, 2023
Tracking issue for boolean path operations Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

linebender/kurbo#277 · 8 comments · 12 reactions · Opened Apr 27, 2023
Proposal: Intersection trait Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

linebender/kurbo#274 · 6 comments · Opened Apr 26, 2023
Robustness problems in path simplification Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

linebender/kurbo#268 · 2 comments · Opened Apr 13, 2023
Path simplification remaining issues Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

linebender/kurbo#264 · Opened Apr 7, 2023
In `Shape`, have default impls for everything except `path_elements` Open

enhancement needs discussion

Difficulty 4/5 3-5 days Newbie friendliness 35/100

linebender/kurbo#263 · 2 comments · Opened Apr 6, 2023
Question: Use `SmallVec` for extrema, rather than `ArrayVec`? Open

question

Difficulty 5/5 Over a week Newbie friendliness 30/100

linebender/kurbo#262 · 1 reaction · Opened Apr 6, 2023
`Line` and `LineSegment` Open

needs discussion question

Difficulty 5/5 Over a week Newbie friendliness 20/100

linebender/kurbo#261 · 3 comments · Opened Apr 6, 2023
Building paths with arcs Open

question

Difficulty 5/5 Over a week Newbie friendliness 30/100

linebender/kurbo#260 · 5 comments · 2 reactions · Opened Apr 3, 2023
Better SVD (preparation for making `Arc` work like `Ellipse`) Open

question

Difficulty 4/5 3-5 days Newbie friendliness 35/100

linebender/kurbo#250 · 7 comments · Opened Mar 23, 2023
Implement `Arbitrary` (behind a feature) and fuzz testing Open

enhancement help wanted needs discussion

Difficulty 4/5 3-5 days Newbie friendliness 35/100

linebender/kurbo#244 · 2 comments · Opened Mar 18, 2023
Better cubic to quadratic Open

needs discussion performance

Difficulty 5/5 Over a week Newbie friendliness 35/100

linebender/kurbo#235 · 3 comments · Opened Mar 2, 2023
Calling `BezPath::close_path` infallibly adds a `PathEl::ClosePath`, leading to buggy behavior Open

enhancement needs discussion

Difficulty 3/5 1-2 days Newbie friendliness 35/100

linebender/kurbo#213 · 3 comments · Opened Jan 13, 2022
Segment/segment intersections Open

enhancement in progress

Difficulty 5/5 Over a week Newbie friendliness 35/100

linebender/kurbo#194 · 6 comments · Opened Sep 9, 2021
Implement `Add<Point>`, `AddAssign<Point>`, and `SubAssign<Point>` for Point. Open

enhancement needs discussion

Difficulty 2/5 1-3 hours Newbie friendliness 45/100

linebender/kurbo#185 · 5 comments · Opened Jul 4, 2021
Possibility of using the `Float` trait instead of `f64`? Open

wontfix

Difficulty 5/5 Over a week Newbie friendliness 28/100

linebender/kurbo#178 · 28 comments · Opened Apr 21, 2021
Fitting of a curve by multiple cubic bezier segments Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

linebender/kurbo#174 · 1 comment · Opened Mar 15, 2021
Use an affine map for `Arc` like we do for `Ellipse`. Open

enhancement needs discussion performance

Difficulty 5/5 Over a week Newbie friendliness 30/100

linebender/kurbo#156 · 4 comments · 1 reaction · Opened Nov 14, 2020
Policy on NaN in vectors? Open

needs discussion

Difficulty 5/5 Over a week Newbie friendliness 25/100

linebender/kurbo#81 · 6 comments · Opened Jan 17, 2020
Add a FuzzyEq trait Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

linebender/kurbo#50 · 5 comments · 3 reactions · Opened Jul 25, 2019
Improve BezPath docs Open

documentation ready

Difficulty 2/5 1-3 hours Newbie friendliness 45/100

linebender/kurbo#10 · 2 comments · Opened Jan 12, 2019

linebender/kurbo

Get new issues in your inbox