ball_params — DRIVE ball 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.ball_params(radius: 'float' = 0.02, mass: 'float' = 0.0027, cd=0.4, cl=None, rho: 'float' = 1.2, g: 'float' = 9.81, shell: 'bool' = True, spin_decay: 'float' = 0.0) -> 'dict' (to call the implementation directly, import ballistics; ballistics.ball_params(radius: 'float' = 0.02, mass: 'float' = 0.0027, cd=0.4, cl=None, rho: 'float' = 1.2, g: 'float' = 9.81, shell: 'bool' = True, spin_decay: 'float' = 0.0) -> 'dict'; from the registry, opsdrive.get("ball_params"))

Usage

> This operator's description has not been translated yet. The original text follows as it is.

球の表。既定は卓球の球(ITTF: 直径 40 mm、2.7 g、薄殻)。

`cd = 抗力係数(数、または "sphere" で Re 依存の経験式 :func:drag_coefficient_sphere)、cl` = 揚力(マグヌス)係数

(None なら :func:magnus_lift_coefficient のスピン比モデル、数なら定数)、`rho` = 空気密度 [kg/m³]、

`spin_decay` = スピンの減衰率 [1/s] (dω/dt = −spin_decay·ω。0 なら減衰なし。実測から同定する量)。

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_ball_bounce — py -3.11 examples/poc_ball_bounce.py

• poc_table_tennis_bounce — py -3.11 examples/poc_table_tennis_bounce.py

• poc_table_tennis_rally_loop — py -3.11 examples/poc_table_tennis_rally_loop.py

• poc_table_tennis_spin — py -3.11 examples/poc_table_tennis_spin.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 (ball)

impact_params · flight_vacuum · flight_ode · flight_simulate · flight_state_at · magnus_lift_coefficient · drag_coefficient_sphere · bounce

*Provenance: ballistics.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.