scoop op• Data kinds: scalar × scalar → table
• Call: import fullseye as fs; fs.ledger.scoop_scene_mjcf(n_spheres: 'int' = 500, radius: 'float' = 0.002, *, a: 'float' = 0.03, h: 'float' = 0.012, rim_height: 'float' = 0.1, mu_slide: 'float' = 0.16, mu_roll: 'float' = 0.09, density: 'float' = 2500.0, bowl_mu: 'float' = 0.5, tile: 'float' = 0.006, drop_gap: 'float' = 0.0003, timestep: 'float' = 0.0015, contact_tc: 'float' = 0.006, solver_iterations: 'int' = 50, solver: 'str' = 'CG', cone: 'str' = 'elliptic', condim: 'int' = 6, seed: 'int' = 0) -> 'dict' (to call the implementation directly, import scoop; scoop.scoop_scene_mjcf(n_spheres: 'int' = 500, radius: 'float' = 0.002, *, a: 'float' = 0.03, h: 'float' = 0.012, rim_height: 'float' = 0.1, mu_slide: 'float' = 0.16, mu_roll: 'float' = 0.09, density: 'float' = 2500.0, bowl_mu: 'float' = 0.5, tile: 'float' = 0.006, drop_gap: 'float' = 0.0003, timestep: 'float' = 0.0015, contact_tc: 'float' = 0.006, solver_iterations: 'int' = 50, solver: 'str' = 'CG', cone: 'str' = 'elliptic', condim: 'int' = 6, seed: 'int' = 0) -> 'dict'; from the registry, opsdrive.get("scoop_scene_mjcf"))
MJCF string of a scene in which a spherical-cap bowl (rim radius a, depth h, rim height rim_height) is tiled with thin plates, and n_spheres rigid spheres are stacked on a grid inside the bowl and released from directly above (no mujoco needed, listed in the ledger).
> The detailed description below is the original text — the summary and the headings are translated.
椀は内面が球(半径 R = (a² + h²) / 2h)に接する厚さ 2 mm の板を、緯度の輪ごとに方位で並べる(tile = 板の目安の辺、隙間ができないよう 1.35 倍に重ねる)。球は底から千鳥の格子で層に積み(椀の内面から r + drop_gap 離す)、縁より上は縁の円柱の中に積む —— 放すと縁より上の柱が崩れて山になり、あふれた球は縁から転がり落ちて床(高さ 0)に散る。上から落とすと跳ねて椀の中身まで飛び出した(500 個中 172 個しか残らず山ができない、実測)ので、すくい上げた直後の静かな状態を模す。摩擦の作法は granular の heap_scene_mjcf と同じ(転がり摩擦は無次元 μ_r × 半径)。
返り: xml, positions(初期中心)、info(n, radius, a, h, R, rim_height, bottom_height, mass_each, timestep, n_tiles, V_struck)。Raises ValueError: contact_tc < 2 timestep / h > a / 綴り違い / 球が入らない。
• 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_powder_scoop_pour — py -3.11 examples/poc_powder_scoop_pour.py
table as input)course_layout · course_occupancy · course_contains · world_build · world_camera · world_move · lidar_scan · rss_longitudinal_same
scoop)spoon_bowl_volume · scoop_synth_side · revolution_volume_side · two_view_volume · scoop_volume_read · scoop_count · scoop_image_limit · tilt_wedge_retained
*Provenance: scoop.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.