Nozzle stubs started at the bounding-box edge, so on a dished head, a
hopper's sloped wall or a cone roof they floated off the vessel (default
horizontal_vessel N3/N4 by 0.8 mm, reactor N3/N4 by 0.06 mm, unbounded for
user fractions). The port now stays STUB outside the bbox and the stub is
drawn from there in to where its axis-aligned line meets the outline, via a
new geometry.scan_hits helper; jacketed reactors' stubs pass through the
jacket to the wall.
validate_vessel_params refuses height <= width for vertical capsules
(vertical_vessel, column, reactor), width <= height for horizontal_vessel
and height <= width/6 for a cone-roof tank: those folded the heads through
each other and produced geometry outside the declared bbox. Unknown keys
inside a nozzle dict are refused naming nozzles[i] and the key, like the
top-level parameters already were.
Tests: a fuzz over every accepted vessel shape x 28 nozzle positions checks
the declared bbox and that each stub's inner end lies on the outline (exact
point-to-arc/segment distance); the default-symbol repros and the refusals
are pinned. 137 of the new cases fail against the previous module.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01FKFStjEFzpGyLq5bMpWxTd
