A T recorded its cut on the crossing segment as a distance from that
segment's start; when the start was carried onto a third wall later in the
same pass the cut went stale, so [c,b,a] drew a free-end jamb inside wall a,
an uncut face and a double-hatched overlap where [c,a,b] was right. Cuts are
now stored as points and measured against the final axis.
A near-straight join whose faces are offset (a thickness or justification
change, or a rounding kink between such walls) mitred at offset/sin(kink):
faces 1e8 mm long and a clockwise region for a 0.01 mm rounding. A
straight-through pair whose mitre lies more than _MITRE_REACH (2) thicknesses
from the node now steps on the line bisecting the join - both sides of a
two-end node together, so the pieces tile without a sliver - and every piece
and hub ring is refused unless counter-clockwise, not only when it crosses
itself.
Pure geometry: no ActiveX member is touched, so no live probe applies.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01FKFStjEFzpGyLq5bMpWxTd
