mirror of
https://github.com/ppy/osu.git
synced 2026-05-17 06:32:36 +08:00
Bartłomiej Dach
0f078ee550
This is a "two-birds-with-one-stone" change, which addresses both https://github.com/ppy/osu/issues/28744 and https://github.com/ppy/osu/issues/11311 simultaneously. - The replay stability issue caused by time instants being rounded to nearest integer is fixed by this, because flooring and subtracting/adding 0.5 from the hit window threshold makes it impossible for a judgement to switch to anything else after replay rounding is applied - all hit windows are always a full integer plus 0.5 milliseconds, which immunizes them to rounding-to-full-ms issues. - The direction of applying the 0.5 adjustment additionally fixes the disparity with stable - in osu! and taiko 0.5 is subtracted as hit window ranges in those rulesets are exclusive on stable, while in mania 0.5 is added, as the hit window ranges there are *inclusive* on stable. As should be obvious, this materially changes hit windows. To what degree this is a *significant* change is up for discussion; I would say "no" since hitting half a millisecond changes would require 2000fps input recording, and we're still timestamping inputs using the update thread's clock, that gives a 1ms resolution at best. In the worst case, in osu! and taiko, this can change a hit window range by 1.5ms (e.g. 300.9ms -> floored to 300ms -> 299.5ms after subtraction of the half). It's more than the best-case resolution of input timestamps, but not by much. Considering how cleanly this resolves the issues in question, I see it as an acceptable tradeoff.
0f078ee550
·
2025-06-25 11:44:13 +02:00
History