A G-2800 sitting at 020° turned anticlockwise reports 020, 010, 000, 359, 358 …
340. The dial fed those straight into a CSS rotate, so the transition travelled
from 20deg to 359deg the long way: a complete revolution on screen while the
mast moved forty degrees in the opposite direction. On a rotator with an overlap
that happens on every pass through north, which is where the antenna spends much
of its time.
unwrapRotation was already there and already did the right thing — it was only
wired to the HOVER beam, where the mouse crossing north had made it obvious.
The antenna's own beam used the raw azimuth.
So the antenna angle is accumulated across renders too: 020 → 000 → −001 →
−020, which is the way the mast is moving. Both lobes of a bidirectional antenna
get their own accumulator, since they cross north at different moments, and the
ref only advances when the input changes so a re-render for any other reason
cannot make the beam creep.
The classic dial is unaffected: it draws its needle from SVG coordinates, with
no transition to send anywhere.
Co-Authored-By: Claude Opus 5 (1M context) <[email protected]>
rouggyandClaude Opus 5
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