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adambelisandCraft Bot
b8d23e280b
Spine::at_length computed tangents from flattened polyline chords, which are piecewise constant and jump discretely between chords on curved spines. Steps oriented to the spine with Align to Path stuttered at large step counts. Fix: store the original PathData in Spine and compute the tangent from the original cubic at the true arc-length position via ParamCurveDeriv, proportionally mapping flattened arc-length s onto each segment's curve arclength using anchor_length values, instead of using piecewise-constant chord directions. Added missing docstrings for Spine::new and Spine::length to satisfy docstring coverage requirements. Co-authored-by: Craft Bot <bot@storytold.dev>