Clean Similar Objects

clean-similar-objects

Dedup the currently selected NON-CURVE objects. Sibling to clean-similar-curves (curves) and clean-geometry (curve cleanup). One script next to this file, simobj_diagnose.py, invoked by the usual one-line loader. v1 is REPORT-ONLY — it never deletes; it reports groups and stashes a plan in sc.sticky["simobj_plan"] for a future v2 apply.

What it detects

• COINCIDENT duplicates — same shape (topology counts + bbox extents) AND same place (bbox center within CEN_TOL). This is the paste-in-place / stacked case → keep one. Type-agnostic: a Brep and an Extrusion of the same solid match (extrusions are compared via .ToBrep()).
• CONGRUENT copies — same shape/size but a DIFFERENT place. Reported separately because they are usually intentional copies (repeated members) — for the user to eyeball, not auto-delete.
• Kinds handled: Breps + Extrusions (as breps), Meshes (vertex/face counts + bbox), block instances (same InstanceDefinition + same instance transform = stacked block).

Procedure

1. Resolve path. Glob **/clean-similar-objects/simobj_diagnose.py. Do NOT hardcode.
2. Diagnose (non-destructive).

   exec(open(r"<ABS>\simobj_diagnose.py").read())
   

   Prints counts per kind: coincident duplicate groups (+ removable count = keep 1 each) and congruent groups. Changes nothing.
3. Report to the user. v1 stops here (report-only). If the user wants deletion now, do it explicitly and per-item with confirmation (there is no bulk apply script yet).

Gotchas (baked in)

• Cheap fingerprint by design. Uses topology counts + bbox extents + bbox center — NOT VolumeMassProperties/AreaMassProperties, which timed out on a real 340-brep / 2000-block model. Volume/centroid confirmation is a v2 refinement (add it only for the delete step, on the small candidate set, never on the whole selection).
• Selection excludes locked/hidden. _SelAll / Objects.Select skip objects on locked or hidden layers, so the diagnose sees only the selectable subset (e.g. 573 of 2338 on the test model). That's correct for a selection-based skill — unlock/show layers first if you mean to include them.
• Coincident vs congruent split prevents nuking legitimate arrays: only same-place stacks are "duplicates"; moved copies are flagged for review, never counted as removable.
• Blocks compared by definition index + instance transform, never by exploded geometry.

Not yet implemented (deferred to v2, by user decision)

• Apply / delete. v1 reports only. v2: delete coincident duplicates (keep 1) after confirm, with a volume+centroid or GeometryEquals/closest-point equivalence check before each delete (never delete on the cheap fingerprint alone).
• Partial-overlap solids → 3-chunk boolean split (CreateBooleanDifference A−B / B−A + CreateBooleanIntersection A∩B) with the boolean guardrails: SolidOrientation/Flip, SplitKinkyFaces, null-vs-empty, validate IsValid/IsSolid. See the plan.
• Congruent (moved) auto-dedup — left as report-only (usually intentional).

Reference

Built 2026-07-01 (task 1b of the 6-task suite). Diagnose validated on the live production model 260629 main ms.3dm (50 breps/extrusions + 523 blocks selectable → 0 coincident, 4 congruent brep groups, no false positives). See memory rhino-clean-rhino-method and the plan.