Metadata for one parked-at-edge tick. The engine supplies the heartbeat; what a tick does — and how it accelerates — is entirely the session's policy (the engine knows nothing about elastic regions).
1-based tick number of the current uninterrupted hold.
Milliseconds since this hold engaged (an acceleration policy can key off this).
How far (px) the pointer sits past the track end (0 when exactly at it).
Metadata for one parked-at-edge tick. The engine supplies the heartbeat; what a tick does — and how it accelerates — is entirely the session's policy (the engine knows nothing about elastic regions).