diabolo 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.diabolo_params(kind: 'str' = 'red', **override) -> 'dict' (to call the implementation directly, import diabolo; diabolo.diabolo_params(kind: 'str' = 'red', **override) -> 'dict'; from the registry, opsdrive.get("diabolo_params"))
Dictionary of diabolo and string dimensions. kind = red / blue / patterned / green (mass, diameter, length and bearing from Table I of the paper).
Values not given in the paper are assumptions, and their names are recorded in assumed: axle radius 6.5 mm (default of the public implementation), string 1.45 m (the "145 cm" in the text), μ_acc = 1/r (rolling limit, rad/m), μ_dec = 0.8/r, c_L = 1 cm and c_F = 5 cm (paper's figure caption), taut-string margin 3 cm (public implementation), plane-rule margin 5 cm (text), cup bottom plate radius 12 mm at 12 mm from the centre, markers at 8 positions at 55 % of the inner-surface radius (of which nos. 0, 1, 3 are reflective = an asymmetric arrangement that uniquely determines the direction of rotation. The paper kept the mass symmetric with non-reflective printed dummies).
Raises ValueError: unknown kind, misspelled key (fail-closed), mass or dimension not a finite positive number, bottom plate outside the cup, c_L ≥ c_F.
• 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_spheroid · 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.