H3 pinned 2 units per guest FRAME. The port needs units per SECOND, and that
decomposition is only valid if the clock counts frames. If it integrates
elapsed time then units/second is the invariant and units/frame is an
artefact of whatever rate the host managed.
Evidence it is time-integrated is already in hand and is the caveat H3 had
to quote: across empty label 5376 the plate's alpha moved +82 where three
adjacent labels each moved +23. 82/23 = 3.57, not an integer number of
ticks, and a fixed per-frame increment cannot produce a fractional multiple
of itself.
Instrument: the draw logger now stamps each frame boundary with
Clock::QueryGuestTickCount() and guest_tick_frequency() -- the GUEST's
timebase, 50 MHz per emulator.cc:225, scalar 1.0 per clock.cc:37. No host
wall clock enters the calculation.
Discriminator, within one run: regress alpha step against the label's guest
duration. Flat => frame-counted. Proportional => time-integrated, and the
slope is the answer.
Predicted before the run: time-integrated with r>0.9, at 60 units per guest
second, accept 55-65, 120 and 30 excluded. Stated honestly as a CONSISTENCY
prediction -- it is what the previous capture's run average implies -- not a
blind one.
Control: the same regression on ptcopyright's ramp, a different element with
a different declared segment. Two elements must agree under the
time-integrated model and need not otherwise.
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