diabolo op• Data kinds: signal × signal × scalar → table
• Call: import fullseye as fs; fs.ledger.diabolo_spheroid(p_left, p_right, string_length: 'float') -> 'dict' (to call the implementation directly, import diabolo; diabolo.diabolo_spheroid(p_left, p_right, string_length: 'float') -> 'dict'; from the registry, opsdrive.get("diabolo_spheroid"))
The 2 stick tips (foci) and the string length → auxiliary spheroid: a = l/2, c = |x_L − x_R|/2, b = √(a² − c²) (the correct form of Eq. 1).
> The detailed description below is the original text — the summary and the headings are translated.
★原文の (1b) は b = √(a² − |x_L − x_R|/2) で、長さと長さの 2 乗の差なので次元が合わない。論文の実機寸法(糸 1.45 m、棒の間隔 1.10 m)を入れると根の中が負になる(NaN)。楕円の恒等式 a² = b² + c² の形に直した(公開実装も 2 乗で書いている)。原文の値は b_paper_literal に残す。原文の前文は「半長軸 b と半短軸 a」と名前が逆(a = l/2 が半長軸)で、式の側に従う。
返り {"center", "axis"(x_L − x_R の単位ベクトル), "a", "b", "c", "b_paper_literal"}。Raises ValueError: 間隔 ≥ 糸、棒が重なる、有限でない入力。
• 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_diabolo_model_and_vision — py -3.11 examples/poc_diabolo_model_and_vision.py
table as input)course_layout · course_occupancy · course_contains · world_build · world_camera · world_move · lidar_scan · rss_longitudinal_same
diabolo)diabolo_params · spheroid_closest · diabolo_dynamics_step · diabolo_simulate · diabolo_state_sequence · diabolo_throw_catch_truth · string_tension_static · string_tension_from_sag
*Provenance: diabolo.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.