The exact-template approach from the last commit over-fit to the
sample ASCII diagram, which was meant to teach the target shape, not
be matched literally cell-for-cell. Back to flood-filling any
connected, fully-enclosed ring the builder makes (any size/shape), but
chevrons are no longer evenly spaced by scan order - the scanner walks
the ring in geometric order and marks local maxima of distance from
the interior's centroid, i.e. the blocks that stick out further than
their ring-neighbours. That's where a real Stargate's chevrons sit
(the 11-wide reference ring naturally produces 7 this way: the top
apex, four shoulder elbows, two side bumps), without hardcoding a
specific size.
Falls back to the old evenly-spaced picker only if the ring isn't a
simple single-thickness loop (each frame block should have exactly
two in-plane neighbours) so odd/thick builds still work.
gate.max-frame-blocks/max-iris-blocks/min-frame-blocks are back;
gate.template is gone.
Michael Burgess
fe3b2b0f14