AJ Isaacs e27def388f fix: geometry simplifier arc connectivity and ellipse support ...

Three bugs prevented the simplifier from working on ellipse geometry:

1. Sweep angle check blocked initial fit — the 5-degree minimum sweep
   was inside TryFit(), killing candidates before the extension loop
   could accumulate enough segments. Moved to TryFitArcAt() after
   extension.

2. Layer reference equality split runs — entities from separate DXF
   ellipses had different Layer object instances for the same layer "0",
   splitting them into independent runs. Changed to compare Layer.Name.

3. Symmetrize replaced arcs with mirrored copies whose endpoints didn't
   match the target's original geometry, creating ~0.014 gaps. Now only
   applies mirrored arcs when endpoints are within tolerance of the
   target's boundary points.

Also: default tolerance 0.02 -> 0.004, Export DXF button in
CadConverterForm for debugging simplified geometry.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

2026-03-27 13:49:27 -04:00

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