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>
PEP-converted nests stored etch marks only in each placed part's locked
cutting program; the drawing program held the contour cuts alone. Because
Remove Lead-ins rebuilds a part from its drawing, clearing lead-ins also
erased the marks from every part.
Recover the marks while reading the nest: when a drawing has no scribe
moves and every placement that kept its saved program carries the same
marks, add them to the drawing in its own frame and refresh that drawing's
clean placements. Saved programs are never rewritten, drawings that already
have marks are untouched, and drawings whose saved programs disagree are
left alone rather than guessed at.
ajandClaude Fable 5.2