clothoid_design — DRIVE lateral op

• Data kinds: none → table (an op determined by its arguments alone — it takes no image or data input)

• Call: import fullseye as fs; fs.ledger.clothoid_design(radius: 'float', length: 'float', speed: 'Optional[float]' = None) -> 'Dict[str, float]' (to call the implementation directly, import drivelateral; drivelateral.clothoid_design(radius: 'float', length: 'float', speed: 'Optional[float]' = None) -> 'Dict[str, float]'; from the registry, opsdrive.get("clothoid_design"))

Usage

Quantities for joining a straight line → circle (radius R) with a clothoid of length L.

> The detailed description below is the original text — the summary and the headings are translated.

返り値: A = √(R L)、end_angle τ = L/(2R)、end_point(終点の (x, y)、フレネル積分)、shift ΔR = y_end − R(1 − cos τ)(円が直線から離れる量。近似 L²/(24R))、lateral_jerk(速さ v を与えたとき v³/(R L) [m/s³] = Shortt 式の P)、min_length_3s(v を与えたとき 3 秒の走行長 3v [m])。

Raises ValueError: R ≤ 0、L ≤ 0、v ≤ 0。

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.

• The canonical algorithm (author, year) and its uses are named in the family usage guide above.

Runnable examples (verified samples that actually call this op)

• poc_driving_lateral — py -3.11 examples/poc_driving_lateral.py

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

course_layout · course_occupancy · course_contains · world_build · world_camera · world_move · lidar_scan · rss_longitudinal_same

Same category (lateral)

friction_circle_usage · curve_speed_limit · design_min_radius · understeer_gradient · steady_cornering · bicycle_model_step · ackermann_steer_angles · offtracking_circle


*Provenance: drivelateral.py — DRIVE 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.