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 eb96e8b6)

• 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)