The simulated cam_xeye (SimIDSCamera/_SimIDSBackend) served a single
static Gaussian blob, cached at construction -- rotating lsamrot in a
simulated session produced no visible motion, so the smear/composite
rotation-center calibration aid had nothing to smear into an arc.
Add an opt-in sim_rotation_coupling config (mirrors the existing
sim_coarse_coupling idiom in sim_lamni.py's measured_positions()): when
set, _SimIDSBackend regenerates a fresh frame on every get_image_data()
call with an eccentric blob (make_rotating_test_pattern) tracking the
coupled axis' live simulated Galil position instead of serving the
cached static frame. Wired into LamNI's cam_xeye sim config only
(host/port/axis matching lsamrot's own sim config); flomni's cam_xeye
and any other SimIDSCamera user are unaffected since the new params
default to None (byte-identical output to before, confirmed by test).
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>