geometry op• Data kinds: primitive → measurement
• Call: import fullseye as fs; fs.ledger.angle_between_lines(d1, d2) (to call the implementation directly, import match3d; match3d.angle_between_lines(d1, d2); from the registry, ops3d.get("angle_between_lines"))
The acute angle between two line directions (in degrees).
> The detailed description below is the original text — the summary and the headings are translated.
`arccos(|d̂1·d̂2|)` を度で返す(float)。絶対値を取るので [0, 90](向きの前後を区別しない。
鈍角側が要るなら `180 − する)。d1, d2` は方向ベクトル(長さは問わない、内部で単位化)、
数値の 2 または 3 ベクトルで次元の混在は ValueError。零ベクトルは 90 が返る。
用途: `fit_line_3d / line_from_2points` の方向同士の平行度・直角度チェック(0 に近いほど
平行、90 に近いほど直交)。
• 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.
• geometry_metrology — py -3.11 examples_3d/geometry_metrology.py
measurement as input)vol_gaussian_psf · fuse_to_voxel · fresnel_reflectance · snell_angle
geometry)line_from_2points · plane_from_3points · angle_3points · angle_between_planes · angle_line_plane · distance_point_plane · distance_point_line · distance_line_line
*Provenance: match3d.py — 3D 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.