membrane_delta_from_normals — DRIVE tacsim op

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

• Call: import fullseye as fs; fs.ledger.membrane_delta_from_normals(normals, X, Y, pitch: 'float', tail: 'str' = 'boussinesq', centre_xy=None) -> 'float' (to call the implementation directly, import tacsim; tacsim.membrane_delta_from_normals(normals, X, Y, pitch: 'float', tail: 'str' = 'boussinesq', centre_xy=None) -> 'float'; from the registry, opsdrive.get("membrane_delta_from_normals"))

Usage

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

中心の沈み込み δ を法線場から: 半径方向スロープ s̄(r) を中心から窓の端まで 1D 積分(∫ s̄ dr = ū_z(0) − ū_z(r_max))し、

`tail="boussinesq"` なら遠方場 ū_z ≈ C/r(点荷重の Boussinesq 解、Johnson §3.2)から残りの裾 ū_z(r_max) = r_max · s̄(r_max)

を足す(窓の端の最後の 3 ビンの中央値)。`tail="none"` は裾なし(有限窓の過小評価をそのまま返す —— 間違いの量を測るため)。

高さの FFT 積分を通らないので振幅の減衰を受けない。返り: δ [m]。Raises `ValueError`: 未知の tail、pitch ≤ 0。

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_tacsim_elastic_membrane — py -3.11 examples/poc_tacsim_elastic_membrane.py

Ops the type connects to (they accept scalar as input)

spin_from_marker_sequence · carla_transform_matrix · carla_pose_to_world · carla_camera_pose · carla_xy_yaw · carla_scene_load · town_chain · osm_parse

Same category (tacsim)

combined_modulus · hertz_sphere · hertz_force · hertz_cylinder · hertz_surface_uz · hertz_pressure · membrane_indent_sphere · membrane_indent_shape


*Provenance: tacsim.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.