freeform op• Data kinds: bspline_curve → points
• Call: import fullseye as fs; fs.ledger.eval_bspline_curve(tck, n=200) (to call the implementation directly, import bspline_surf; bspline_surf.eval_bspline_curve(tck, n=200); from the registry, ops3d.get("eval_bspline_curve"))
Evaluate the curve tck at n evenly spaced points over the parameter u∈[0,1] (splev).
tck : tuple
The (t, c, k) returned by fit_bspline_curve.
n : int
Number of evaluation points (default 200). 2 or more.
numpy.ndarray, shape (n, D)
Point sequence on the curve. D is the input dimension at fit time ((n, 3) for 3D input).
Notes:
• u is linspace(0, 1, n), so it is equally spaced in the parameter, not equally spaced in arc length. The point density depends on how dense or sparse the original sequence was. For arc-length equal spacing, pass this op's output through resample_uniform.
• Both end points u=0, u=1 are included.
• Raises ValueError: tck is not a curve model (t, c, k) (a surface tck / polynomial dict is rejected by name), or n < 2.
• The return value is float64 (n, D). Deterministic.
• 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.
• bspline_freeform — py -3.11 examples_3d/bspline_freeform.py
points as input)points_to_voxel · gaussians_to_voxel · estimate_point_normals · to_points · match_points_ncc · match_pca · moment_axes · icp_point2point_3d
freeform)fit_bspline_surface · eval_bspline_surface · surface_residual · fit_bspline_curve
*Provenance: bspline_surf.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.