crest_sight_distance — DRIVE pass 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.crest_sight_distance(*, radius: 'Optional[float]' = None, grade_in: 'Optional[float]' = None, grade_out: 'Optional[float]' = None, length: 'Optional[float]' = None, eye_height: 'float' = 1.2, object_height: 'float' = 0.1) -> 'Dict[str, object]' (to call the implementation directly, import drivepass; drivepass.crest_sight_distance(*, radius: 'Optional[float]' = None, grade_in: 'Optional[float]' = None, grade_out: 'Optional[float]' = None, length: 'Optional[float]' = None, eye_height: 'float' = 1.2, object_height: 'float' = 0.1) -> 'Dict[str, object]'; from the registry, opsdrive.get("crest_sight_distance"))

Usage

Minimum sight distance over a crest vertical curve (parabola) (closed form). Scenarios S065, S081 (near the top of an uphill grade).

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

radius だけなら長さ無限の曲線(視距が曲線の中に収まる): S = √(2R)(√h₁ + √h₂)。grade_in / grade_out (比、上りが正)と length = 曲線の水平の長さ L なら A = grade_in − grade_out(> 0)、R = L/A で、S ≤ L なら上の式、S > L なら S = L/2 + (√h₁ + √h₂)²/A。h₁ = eye_height、h₂ = object_height (既定 1.2 m・0.1 m = 道路構造令 2 条 24 号。対向車を見るなら h₂ = 車の高さ)。

返り値: sight、radius、within_curve(S ≤ L)。

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_pass — py -3.11 examples/poc_driving_pass.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 (pass)

overtake_requirement · overtake_return_gap · no_overtaking_zones · overtake_permitted · overtaken_conduct_check · lane_change_follower_decel · lane_change_permitted · roundabout_entry_check

*Provenance: drivepass.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.