mesh_process op• Data kinds: mesh → mesh
• Call: import fullseye as fs; fs.ledger.decimate_qem(V, F, target_faces, protect=None) (implementation को सीधे call करना हो तो import meshrepair; meshrepair.decimate_qem(V, F, target_faces, protect=None), registry से लेना हो तो ops3d.get("decimate_qem"))
*target_faces* की ओर quadric-error-metric edge-collapse decimation।
> नीचे का विस्तृत विवरण मूल text में है — सारांश और headings का अनुवाद हो चुका है।
*protect* (optional, (nv,) bool): vertices that must survive untouched — no edge incident to a protected vertex is collapsed, so the faces around a crater rim, a boulder or any region you flagged keep their exact geometry (meshres.mesh_decimate_preserving derives the mask from the detail map and reports what the rest of the reduction lost).
Garland & Heckbert 1997: each vertex carries the sum of the squared-distance quadrics of its incident face planes; the cheapest edge is collapsed to the position minimising that quadric (a midpoint/endpoint fallback when the 3x3 system is singular, e.g. on a flat face), quadrics are accumulated onto the surviving vertex, and incident edge costs are re-queued. Collapses that would flip a face normal or land on a non-manifold edge are skipped, so the result stays a sane surface.
Honest scope: this is a practical QEM, not production-grade. It has no boundary-preservation term, no attribute (colour/UV) quadrics and no aggressive validity recovery, so on awkward meshes a few non-ideal collapses can survive and the collapse may stop a little short of *target_faces* when every remaining candidate is blocked by the flip/manifold guard. Good enough for a cheap collision proxy; not a replacement for a dedicated remesher.
• blender_interop — Blender के साथ उपयोग — shape बनाएँ, fullseye से मापें (सावधानियाँ: axes, units, ground truth)
• Sample data catalog (DL URL / license) — 2-D के लिए skimage.data (BSD/public) + synthetic, 3-D के लिए real data sources (Stanford/PDS आदि) के DL URL।
• Operators का स्रोत और संदर्भ — इस op family के मूल research/methods के स्रोत।
• mesh_decimate — py -3.11 examples_3d/mesh_decimate.py
• mesh_lod_download — py -3.11 examples_3d/mesh_lod_download.py
• mesh_resolution_demo — py -3.11 examples_3d/mesh_resolution_demo.py
mesh को input के रूप में लेते हैं)mesh_to_voxel · mesh_to_points · to_points · fuse_to_voxel · ambient_occlusion · cast_shadow · supersample_mesh · render_beauty
mesh_process)laplacian_smooth · taubin_smooth · face_normals · vertex_normals · mesh_area · vertex_curvature · face_areas · mesh_volume
*Provenance: meshrepair.py — 3D operator registry. यह per-op note tools/opdocs.py md से अपने-आप generate होता है (हाथ से edit न करें)।*
© 2026 Kazufumi Furuse — Fullseye operator documentation. Licensed under Apache-2.0.