Two halves of the felt run-hitch (the visible one-frame player lurch):
- The presentation lerp normalized the pending object-clock time by the
fixed 30 Hz MinQuantum, but retail's object clock simulates
VARIABLE-length quanta (CPhysicsObj::update_object 0x00515D10: capped
at MaxQuantum, everything above MinQuantum runs as ONE step). After a
long frame the view froze for the quantum and then fast-replayed it.
ComputeRenderPosition now spans the ACTUAL last quantum
(_lastQuantumSeconds), and PresentedDeltaSeconds accounts continuous
presented time across quantum boundaries.
- The chase camera damped toward the presented player using wall dt
while the player presents on the object clock, so a long frame
stepped the camera far past the under-advanced player — measured up
to ~1 m of camera/player decoherence in a single frame. Retail ties
camera update to the physics-update callback
(SmartBox::PlayerPhysicsUpdatedCallback 0x00452d60), i.e. the same
clock as the body; both chase cameras now integrate
PresentedDeltaSeconds. Manual zoom/pitch adjustment stays on wall dt
(a user-input rate, not target chasing).
Owner gate: camera-vs-player boom-length change fell from ~1 m spikes
to 0.2-1.2 cm median on long frames; teleports settle clean. Two
Runtime tests updated to pin the continuous-rate contract. The
temporary PlayerPresentationProbe apparatus that measured this is
retired with the fix.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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