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ajandClaude Opus 5.5
01789c5929
GetOffsetPerimeterEntities/GetOffsetPartEntities feed directional-distance loops (FillLinear, Compactor, RotationSlideStrategy) that handle arcs natively. Switching them to Clipper line output (plan option B) made OpenNest.Tests run 48s -> 8m19s, Fill tests ~3x slower, and broke 20 exact-fit tests through tessellation and conservative padding, so they keep the per-entity offset (option A), hardened: - Arc, Circle and Line offsets are now side-symmetric. Right on a CCW arc shrank instead of growing, Right on a CW circle grew, and Right on a line offset to the left and reversed it. Only Left was used on hot paths, so this was latent (SimplifierViewer drew both tolerance bands on one side). - Shape.OffsetEntity closes every gap between consecutive offset pieces: convex non-tangent line/arc corners get a round join about the original corner, lines across a collapsed fillet are mitered, and any other gap (concave arc corner, collapsed entity) is bridged with a line. Before, only line-line corners were joined, so a vertex could slip through. - Zero-area spikes are left in place and documented: they lie inside the offset envelope, which is harmless for directional distance. - OffsetOutward/OffsetInward become internal; PartGeometry is their only caller. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>