OneCAD-Draft/CHANGELOG.md

Changelog

Notable changes on feature/parametric-constraint-system since each push to GitHub. Newest entries first. "Unreleased" covers local changes not yet pushed.

Unreleased (since 3d0a41b6)

• Fix: a sketch's constraint set (or the named-parameter table) silently lost all of its entries on the next DWG open once its serialized size passed 255 bytes — roughly 5-6 constraints, easily reached by a real sketch. Root cause: the vendored DWG writer packs an XRecord binary Chunk entry's length as a single u8 and truncates anything longer (cadcodec's encode_xrecord_entries), so the truncated bytes then failed to bincode::deserialize on load and the loader silently dropped the whole scope rather than erroring. DXF was unaffected (its writer has no such cap), which is what made this findable — the exact same document round-tripped constraint-for-constraint through DXF and came back empty through DWG. Fixed entirely on the OCS side, no dependency patch needed: the blob is now split across as many same-code 310 entries as it takes (below 255 bytes each) on save, and every entry for that key is concatenated back together on load, instead of just the first one. (sketch_persist.rs, named_parameters_persist.rs)

• Fix: none of the 17 sketch-constraint commands (HCONSTRAINT, VCONSTRAINT, PCONSTRAINT, QCONSTRAINT, ECONSTRAINT, TCONSTRAINT, NCONSTRAINT, NRCONSTRAINT, LCONSTRAINT, FXCONSTRAINT, SYCONSTRAINT, CCONSTRAINT, EDCONSTRAINT, CPCONSTRAINT, MPCONSTRAINT, OCCONSTRAINT, DCONSTRAINT, ACONSTRAINT) carried an inventory::submit! registration — a pre-existing gap the docs/command_reference.md generator had already flagged, which meant every constraint command (including this session's new NRCONSTRAINT) was invisible to command-line autocomplete and the MCP server's commands listing, despite working fine when typed exactly. Each constraint module now registers itself, with a regression test pinning it so the gap can't silently reappear.

  • The same missing registration also broke the keyboard-shortcut editor (ALIASEDIT): it validates a custom shortcut's target against this same registry and silently rejected anything not in it, so a user could not assign a custom shortcut to any constraint command — not just the new ones, the original HCONSTRAINT/ CCONSTRAINT/etc. family too. Fixed by the same change. (tools.rs, coincident.rs, equal_distance.rs, point_on_entity.rs, value.rs, command.rs)

Pushed 2026-09-10 (eb96e8b6 → 3d0a41b6)

• Fix: a dimensional constraint's value prompt (e.g. DCONSTRAINT's "Specify distance:") rejected a named parameter typed in its own lowercase name — the command line uppercases typed text before it reaches the parser, so r became R and no longer matched the parameter table's case-sensitive lookup. parse_driving_value now matches parameter names case-insensitively and resolves to the parameter's canonical name. (value.rs)
• Feature: Named Parameters panel gains a "Used by" column showing which constraints (kind + entity handles) currently reference each parameter, with a hover tooltip listing the full per-constraint entity breakdown when more than a couple of constraints use it. Backed by a new Scene::parameter_usage(name) query that searches every sketch scope (model space and blocks) and deduplicates an entity referenced by more than one of a constraint's point markers. (named_parameters.rs, sketch_constraints.rs)
• Named Parameters modal widened (620 → 820) to fit the new column. (modal.rs)
• Feature: constraint-solver support extended well beyond Line/Circle, closing most of the gap with FreeCAD's Sketcher (grounded against real ObjectARX headers so DWG-native persistence stays honest about what AutoCAD itself can represent):
  • Arcs are now full constraint participants: center/radius (Concentric, Tangent, Equal, CenterPoint, Radius, Diameter, Fixed, Normal) via the same solver representation a Circle uses, and actual endpoints (Coincident/PointOnCurve/Midpoint/EqualDistance/Symmetric on an arc's real start/end point, marker 0/1) — kept numerically consistent with center/radius/angle by "arc rules" constraints added for every registered arc, reusing an already-ported-but-unused ocs_gcs primitive (CurveValue) rather than new low-level math.
  • New dimensional kinds: Diameter, DistanceX, DistanceY, ArcLength — reusing existing DWG classes (Diameter/DistanceX/Y ride the same ACRADIUSDIAMETERCONSTRAINT/ACDISTANCECONSTRAINT objects Radius/Distance already use, with a different mode/direction byte, matching how AutoCAD itself represents them). ArcLength has no DWG equivalent at all (confirmed against ObjectARX's own headers) and is XRecord-only by design, not omission.
  • New geometric kind: Normal (a line perpendicular to a circle/arc's tangent), matching AutoCAD's real kNormal constraint type.
  • New entity: Ellipse (center/Concentric/CenterPoint/Fixed only — major/minor axis dimensional constraints and PointOnEllipse-based Coincident/Tangent remain a follow-up). DWG-native persistence for ellipse-referencing constraints is deliberately not implemented yet — acadrust's Ellipse/BoundedEllipse node variants have a different field shape than the geometry-dependency role Circle/Arc play, and guessing the semantics risked writing a plausible-but-wrong object graph, so it degrades to XRecord-only instead. (sketch_solve.rs, sketch_constraints.rs, dwg_native_constraints.rs, value.rs)