long 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.long_params(mass: 'float' = 1300.0, c_rr: 'float' = 0.012, cda: 'float' = 0.65, rho_air: 'float' = 1.2, a_drive_max: 'float' = 3.0, a_brake_max: 'float' = 6.0, reaction: 'float' = 0.75, mu: 'float' = 0.8, a_creep: 'float' = 0.3, g: 'float' = 9.80665) -> 'Dict[str, float]' (to call the implementation directly, import drivelong; drivelong.long_params(mass: 'float' = 1300.0, c_rr: 'float' = 0.012, cda: 'float' = 0.65, rho_air: 'float' = 1.2, a_drive_max: 'float' = 3.0, a_brake_max: 'float' = 6.0, reaction: 'float' = 0.75, mu: 'float' = 0.8, a_creep: 'float' = 0.3, g: 'float' = 9.80665) -> 'Dict[str, float]'; from the registry, opsdrive.get("long_params"))
Parameters of the longitudinal motion (all defaults are assumptions; sources are in the module docstring).
mass : vehicle mass [kg] (> 0). Affects only the air-drag coefficient k = ρ_air C_d A / (2 m).
c_rr : rolling-resistance coefficient (≥ 0, literature values 0.010–0.015)
cda : C_d × frontal projected area [m²] (≥ 0. 0 = no air drag)
rho_air : air density [kg/m³] (≥ 0)
a_drive_max, a_brake_max : drive and braking limits [m/s²] (> 0). The actual limit is further capped at μ g cos θ.
reaction : reaction time (free running) [s] (≥ 0)
mu : road–tyre friction coefficient (> 0. dry 0.7–0.8, wet 0.4–0.6 —— to be confirmed)
a_creep : AT creep drive [m/s²] (≥ 0. only while holding)
g : gravitational acceleration [m/s²] (> 0)
dict : same keys as the arguments + k (air-drag coefficient [1/m]).
Raises ValueError: non-finite or out of range.
• 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.
• poc_driving_longitudinal — py -3.11 examples/poc_driving_longitudinal.py
• poc_driving_town — py -3.11 examples/poc_driving_town.py
• poc_driving_traffic — py -3.11 examples/poc_driving_traffic.py
• poc_driving_weather — py -3.11 examples/poc_driving_weather.py
table as input)course_layout · course_occupancy · course_contains · world_build · world_camera · world_move · lidar_scan · rss_longitudinal_same
long)road_profile · road_eval · long_simulate · long_energy_residual · stopping_distance_grade · stop_line_plan · plan_command · hill_hold_brake_min
*Provenance: drivelong.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.