surface op• データ種: なし → voxel(引数だけで決まる op —— 画像やデータの入力を取らない)
• 呼び出し: import fullseye as fs; fs.ledger.gyroid_solid_mask(shape=(64, 64, 64), level=0.0, periods=1.0, thickness=0.3) (実装を直接呼ぶなら import render3d; render3d.gyroid_solid_mask(shape=(64, 64, 64), level=0.0, periods=1.0, thickness=0.3)、台帳から引くなら ops3d.get("gyroid_solid_mask"))
The gyroid as a printable solid: the shell within ±*thickness* of the level set.
Returns a `volume` (float 0/1), so it feeds the existing voxel ops
(`vol_label / skeletonize_vol / mesh_slice_stack`) directly and needs
no marching cubes —— this form works on bare numpy, while
:func:gyroid_isosurface needs scikit-image.
★Why this earns its place: at `level = 0` the field is odd under the
body-centred inversion, so the solid fraction of the two sides is *exactly*
equal —— a symmetry fact the mask can be checked against (the measured
fraction above 0 converges on 0.5 as the grid refines), and the shell volume
grows linearly in *thickness* for small *thickness* because the level set has
finite area. Both are independent of how the field was sampled.
Raises `ValueError`: a grid below 8 per axis or over the cap;
non-positive periods; a non-finite level; a negative thickness.
• サンプルデータ カタログ(DL URL / ライセンス) — 2-D は skimage.data(BSD/public)+ 合成、3-D は実データ源(Stanford/PDS 等)の DL URL。
• 演算子の来歴・参考文献 — この op 族の元になった研究/手法の出典。
• minimal_surfaces — py -3.11 examples_3d/minimal_surfaces.py
voxel を入力に取れる)voxel_to_mips · voxel_to_mesh · signed_distance_field · to_points · sobel3d · hessian3d · curvature_maps · edt_jfa
surface)minimal_surface · minimal_surface_bend · gyroid_isosurface · curve3d_tube_mesh
*Provenance: render3d.py — 3D operator registry. この per-op ノートは tools/opdocs.py md が自動生成(手編集しない)。*
© 2026 Kazufumi Furuse — Fullseye operator documentation. Licensed under Apache-2.0.