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use drift ema

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This commit is contained in:
vis2k 2023-03-16 12:09:41 +08:00
parent 3478c29e40
commit 166291748e
1 changed files with 10 additions and 4 deletions
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14
Assets/Mirror/Core/SnapshotInterpolation/SnapshotInterpolation.cs
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@ -53,15 +53,21 @@ public static void TimeBalance(
ref double localTimeline,
out double localTimescale,
double bufferTime,
double driftEma,
double latestRemoteTime,
double catchupSpeed, // in percent %
double slowdownSpeed) // in percent %
{
// first, calculate how far we are currently away from bufferTime.
// use driftEma for averaged, smoother results.
// we don't want to be too nervous for catchup/slowdown.
double drift = driftEma - bufferTime;
// we want local timeline to always be 'bufferTime' behind remote.
double targetTime = latestRemoteTime - bufferTime;
// way too far behind: clamp hard & apply catchup.
if (localTimeline < targetTime - bufferTime)
if (drift > bufferTime)
{
localTimeline = targetTime - bufferTime;
localTimescale = 1 + catchupSpeed; // n% faster
@ -69,14 +75,14 @@ public static void TimeBalance(
}
// just a little behind: only apply catchup.
if (localTimeline < targetTime - bufferTime / 2)
if (drift > bufferTime / 2)
{
localTimescale = 1 + catchupSpeed; // n% faster
return;
}
// way too far ahead. clamp hard & apply slowdown.
if (localTimeline > targetTime + bufferTime)
if (drift < bufferTime)
{
localTimeline = targetTime + bufferTime;
localTimescale = 1 - slowdownSpeed; // n% slower
@ -84,7 +90,7 @@ public static void TimeBalance(
}
// just a little ahead. only apply slowdown.
if (localTimeline > targetTime + bufferTime / 2)
if (drift < bufferTime / 2)
{
localTimescale = 1 - slowdownSpeed; // n% slower
return;