arc_length — 3D curve op

• Data kinds: points → measurement

• Call: import curve3d; curve3d.arc_length(curve) (or ops3d.get("arc_length"))

Usage

The cumulative arc length of a curve and its total. → (cumulative (N,), total float).

References (sample data, literature)

• 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.

Runnable examples (verified samples that actually call this op)

• space_curve — py -3.11 examples_3d/space_curve.py

• torus_knot_curve — py -3.11 examples_3d/torus_knot_curve.py

Ops the type connects to (they accept measurement as input)

vol_gaussian_psf · fuse_to_voxel · fresnel_reflectance · snell_angle

Same category (curve)

curvature_torsion · frenet_frame · resample_uniform · fit_spline_curve

*Provenance: curve3d.py — 3D 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.