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adambelisandCraft Bot
cb5300415a
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. Updated segment-selection condition in Spine::at_length to skip segments whose flattened end is not greater than start before checking whether s is within the segment. Preserve the existing final-segment fallback so at_length(0.0) selects a nonzero segment and uses its tangent. Added missing docstrings for Spine::new and Spine::length to satisfy docstring coverage requirements. Co-authored-by: Craft Bot <bot@storytold.dev>