A part's sequence-number label point was computed once from the drawing's
program and cached forever. Editing a drawing in the converter replaces
that program, sometimes in a different frame, so the labels of every
placed copy stayed at the old frame's point and drifted off the parts.
Keep the cached point only while the drawing program (and its rotation)
is the one it came from.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Each zoom step rebuilt every part's display paths from its CNC program,
and each drag step rebuilt the moved parts, which dominates for parts
with hundreds of holes. LayoutPart now keeps its paths in the drawing's
program frame and only maps them to the view on a zoom or move,
rebuilding when IsDirty is set or the program, rotation or manual
lead-ins change. Also caches the label StringFormat.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
ajandClaude Opus 5.5