sight_stop_speed — DRIVE env op

• Data kinds: scalar × scalar × scalar → scalar

• Call: import fullseye as fs; fs.ledger.sight_stop_speed(sight: 'float', reaction: 'float', brake: 'float', theta: 'float' = 0.0, c_rr: 'float' = 0.0, k: 'float' = 0.0, g: 'float' = 9.80665) -> 'float' (to call the implementation directly, import driveenv; driveenv.sight_stop_speed(sight: 'float', reaction: 'float', brake: 'float', theta: 'float' = 0.0, c_rr: 'float' = 0.0, k: 'float' = 0.0, g: 'float' = 9.80665) -> 'float'; from the registry, opsdrive.get("sight_stop_speed"))

Usage

Maximum speed v* at which the car can stop within the visible distance sight: drivelong.stopping_distance_grade(v*) = sight.

For k = 0, the positive root of v ρ + v²/(2A) = D is v* = A (√(ρ² + 2D/A) − ρ) (A = brake + g sin θ + c_rr g cos θ). For k > 0, the stopping distance is monotonic in v, so bisection (1e-12). If A ≤ 0 (braking loses on a downhill), 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_weather — py -3.11 examples/poc_driving_weather.py

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

spin_from_marker_sequence · carla_transform_matrix · carla_pose_to_world · carla_camera_pose · carla_xy_yaw · carla_scene_load · town_chain · osm_parse

Same category (env)

julian_day · sun_at · sun_events · sun_vector · sun_illuminance · koschmieder · mor_from_beta · beta_from_mor


*Provenance: driveenv.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.