Area and the canonical angle were refreshed together only by the Program setter; an in-place program edit needed two separate calls, and UpdateArea kept a stale Area when no material was left. ProgramChanged is now the single entry point (the setter calls it), a program with no material or a null program gives Area 0, and UpdateArea/RecomputeCanonicalAngle are private.
Co-Authored-By: Claude Fable 5.2 <noreply@anthropic.com>
Thirteen test classes built the same origin-anchored rectangle drawing in
their own private helper (MakeRectDrawing, MakeRect or Rect). They now
call TestHelpers.MakeRectDrawing.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Part.Rotation is cumulative, so rebinding canonical parts with
CreateAtOrigin(original, p.Rotation) double-counted the drawing's own
rotation, and FromCanonical rotated each part about its Location, which
moved it off its slot and out of the work area. Add
CanonicalFrame.RebindToOriginal (rotation = part - original program
rotation, footprint aligned to the canonical part) and use it in the
three places that duplicated the old logic.
The MBR only fixes the frame modulo 90 degrees and nest results are not
90-degree symmetric (an L gave 56/43/42/42 parts by orientation).
CanonicalAngle.Compute now picks one of the four orientations from the
centroid offset; symmetric shapes keep the MBR orientation.
Fixes the three NestInvarianceTests.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
ajandClaude Fable 5.2