A stroke can carry a width profile: widths at positions along the path
(each subpath by length), interpolated smoothly (monotone cubic).
- doc: WidthProfile / WidthPoint / WidthPreset (uniform, wedge, taper both
ends, eye, rounded, pinch) on StrokeProps, serde-defaulted so older files
load; paint reach and hit testing follow the widest point.
- pathops: path measuring by length and the variable outline (offset along
the normals, round/miter/bevel joins, caps, dashes keep their width,
Inside/Outside clip as before; bounded samples and dashes, uniform
fallback). Canvas, PNG, SVG (filled outline), PDF and outline stroke use it.
- engine: stroke.widthProfile {preset | points}, node.set widthProfile,
inspect output; the Variable width tool (Shift+W) in vector edit mode:
drag the path to add a width point, slide points, drag their handles,
Delete removes the selected one; vector.edit.widthPoint add/set/remove.
Every gesture is one undo step.
- UI: width profile dropdown with previews drawn in code and a flip button
in the stroke settings; the tool in the edit toolbar (new icon drawn in
code); width handles and a hover preview on the canvas; Position/Width
fields for the selected width point.
- Tests: profile maths, outlines, render regressions, tool gestures,
commands, exports and junk sweeps. ROADMAP, README, docs updated.
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
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