stroke op• Data kinds: pairs → pairs
• Call: import fullseye as fs; fs.ledger.stroke_resample_closed(points, n_points, allow_shortening=False) (to call the implementation directly, import printpath; printpath.stroke_resample_closed(points, n_points, allow_shortening=False); from the registry, opsprintpath.get("stroke_resample_closed"))
Resamples a closed line at equal arc length. → pairs
The stage before passing to Fourier. ★The coefficients change with the choice of parameterisation (up to 47x measured), so here it is stated explicitly as equally spaced in arc length. The arc-length spacing is constant to machine precision (measured cv 1e-14).
★However, resampling makes the line shorter: consecutive samples are joined by chords, so corners are cut at the bends. Measured (a tour with 300 vertices): 4000 samples give 99.1 % of the length, 1024 give 96.9 %, 300 (same as the vertex count) 89.3 %, 100 give 72.8 %, 50 give 57.7 %. If the length changes, the reproduction of tone also breaks, so fewer samples than input vertices are rejected by default (if intended, allow_shortening=True).
• Sample-data catalog (download URLs / licences) — 2-D uses skimage.data (BSD/public domain) plus synthetic images; 3-D lists download URLs for real data sources (Stanford, PDS, …).
• Operator provenance and references — the sources of the research/methods this op family came from.
• The canonical algorithm (author, year) and its uses are named in the family usage guide above.
• poc_one_stroke_epicycles — py -3.11 examples/poc_one_stroke_epicycles.py
pairs as input)stipple_energy · stroke_tour_closed · mst_length · stroke_tone_error · mosaic_tiles_render
stroke)stipple_points_from_image · stipple_energy · stroke_tour_closed · mst_length · stroke_tone_error
*Provenance: printpath.py — PRINTPATH operator registry. This per-op note is generated by tools/opdocs.py md (do not hand-edit).*
© 2026 Kazufumi Furuse — Fullseye operator documentation. Licensed under Apache-2.0.