heap_spheres_select — DRIVE granular op

• Data kinds: matrix × scalar × scalar × scalar → table

• Call: import fullseye as fs; fs.ledger.heap_spheres_select(pos, radius: 'float', floor_height: 'float', bin_radius: 'float', keep_min: 'float' = 0.5) -> 'dict' (to call the implementation directly, import granular; granular.heap_spheres_select(pos, radius: 'float', floor_height: 'float', bin_radius: 'float', keep_min: 'float' = 0.5) -> 'dict'; from the registry, opsdrive.get("heap_spheres_select"))

Usage

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

山に属する球だけを選ぶ: ビンの底板より下(`z < floor_height − r`)で、ビン半径の 3 倍の内側。

ビンに残った球(平底の滞留層)と転がって逃げた球は山ではない。返り: `pos(選んだ中心)、n_in_bin`、

`n_runaway、radius_95(山の半径の目安)。**Raises** ValueError: 残りが keep_min` 未満(山になって

いない —— 滑らかな台で 1,200 個中 600 個が逃げたときに黙って測らないため)。

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_granular_heap_repose — py -3.11 examples/poc_granular_heap_repose.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 (granular)

heap_volume_cone · heap_mass · heap_volume_heightmap · beverloo_rate · beverloo_fit · discharge_synth · dispense_mass_from_video · hopper_discharge_rate

*Provenance: granular.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.