mesh_process op• Data kinds: mesh → normals
• Call: import fullseye as fs; fs.ledger.vertex_normals(mesh) -> 'np.ndarray' (to call the implementation directly, import mesh_props; mesh_props.vertex_normals(mesh) -> 'np.ndarray'; from the registry, ops3d.get("vertex_normals"))
The vertex normals of a triangle mesh (unit normals aggregated with area weights). → (N,3).
The cross-product vector of each triangle (= face normal × 2·area) is scatter-added to its 3 vertices, then normalised per vertex. This gives an area-weighted average where larger (more important) faces contribute more, and the orientation is consistent with the face winding. Unlike normals_orient.estimate_normals (point cloud PCA, sign undetermined), no extra orientation step is needed.
Args:
mesh: tuple of (vertices (N,3), faces (M,3)).
Returns:
(N,3) unit vertex normals.
Raises:
ValueError: invalid shape, index out of range, or when there is a vertex whose normal cannot be defined (no incident face /
contributions cancel to zero).
• blender_interop — Using Blender alongside — build the shape, measure it with fullseye (pitfalls: axes, units, ground truth)
• 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.
• mesh_props — py -3.11 examples_3d/mesh_props.py
normals as input)icp_point2plane · compute_fpfh · shot_descriptor · fuse_to_voxel · reflect · refract · normal_consistency · ransac_cylinder
mesh_process)laplacian_smooth · taubin_smooth · decimate_qem · face_normals · mesh_area · vertex_curvature · face_areas · mesh_volume
*Provenance: mesh_props.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.