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feat(NetworkTransformReliable): Added SendIntervalMultiplier to optionally reduce bandwidth (#3424)
* NetworkTransformReliable - formatting for consistancy / legibility * feat(NetworkTransformReliable): Added SendIntervalMultiplier * fixed conflict * formatting * formatting * formatting * formatting * formatting * indention * syntax * syntax * formatting * syntax * syntax * Restored formatting changes * one more formatting revert * Update NetworkTransformReliable.cs --------- Co-authored-by: mischa <16416509+vis2k@users.noreply.github.com>
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MrGadget
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@ -11,9 +11,18 @@ public class NetworkTransformReliable : NetworkTransformBase
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[Header("Sync Only If Changed")]
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[Tooltip("When true, changes are not sent unless greater than sensitivity values below.")]
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public bool onlySyncOnChange = true;
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float onlySyncOnChangeInterval => onlySyncOnChangeCorrectionMultiplier * sendIntervalMultiplier;
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uint sendIntervalCounter = 0;
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double lastSendIntervalTime = double.MinValue;
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[Tooltip("If we only sync on change, then we need to correct old snapshots if more time than sendInterval * multiplier has elapsed.\n\nOtherwise the first move will always start interpolating from the last move sequence's time, which will make it stutter when starting every time.")]
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public float onlySyncOnChangeCorrectionMultiplier = 2;
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[Header("Send Interval Multiplier")]
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[Tooltip("Check/Sync every multiple of Network Manager send interval (= 1 / NM Send Rate), instead of every send interval.")]
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[Range(1, 120)]
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public uint sendIntervalMultiplier = 3;
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[Header("Rotation")]
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[Tooltip("Sensitivity of changes needed before an updated state is sent over the network")]
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public float rotationSensitivity = 0.01f;
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@ -47,8 +56,9 @@ public class NetworkTransformReliable : NetworkTransformBase
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// Used to store last sent snapshots
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protected TransformSnapshot last;
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protected int lastClientCount = 1;
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// update //////////////////////////////////////////////////////////////
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// Update applies interpolation.
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void Update()
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{
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// if server then always sync to others.
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@ -58,18 +68,19 @@ void Update()
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else if (isClient) UpdateClient();
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}
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// LateUpdate sets dirty.
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// movement scripts may change positions in Update.
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// use LateUpdate to ensure changes are detected in the same frame.
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// otherwise this may run before user update, delaying detection until next frame.
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// this would cause visible jitter.
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void LateUpdate()
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{
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// set dirty to trigger OnSerialize. either always, or only if changed.
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if (isServer || (IsClientWithAuthority && NetworkClient.ready)) // is NetworkClient.ready even needed?
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// It has to be checked in LateUpdate() for onlySyncOnChange to avoid
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// the possibility of Update() running first before the object's movement
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// script's Update(), which then causes NT to send every alternate frame
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// instead.
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if (isServer || (IsClientWithAuthority && NetworkClient.ready))
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{
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if (!onlySyncOnChange || Changed(Construct()))
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if (sendIntervalCounter == sendIntervalMultiplier && (!onlySyncOnChange || Changed(Construct())))
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SetDirty();
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CheckLastSendTime();
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}
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}
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@ -126,6 +137,19 @@ protected virtual void UpdateClient()
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TransformSnapshot computed = TransformSnapshot.Interpolate(from, to, t);
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Apply(computed, to);
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}
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lastClientCount = clientSnapshots.Count;
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}
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}
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protected virtual void CheckLastSendTime()
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{
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// timeAsDouble not available in older Unity versions.
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if (AccurateInterval.Elapsed(NetworkTime.localTime, NetworkServer.sendInterval, ref lastSendIntervalTime))
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{
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if (sendIntervalCounter == sendIntervalMultiplier)
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sendIntervalCounter = 0;
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sendIntervalCounter++;
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}
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}
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@ -173,6 +197,16 @@ public override void OnSerialize(NetworkWriter writer, bool initialState)
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// initial
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if (initialState)
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{
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// If there is a last serialized snapshot, we use it.
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// This prevents the new client getting a snapshot that is different
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// from what the older clients last got. If this happens, and on the next
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// regular serialisation the delta compression will get wrong values.
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// Notes:
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// 1. Interestingly only the older clients have it wrong, because at the end
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// of this function, last = snapshot which is the initial state's snapshot
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// 2. Regular NTR gets by this bug because it sends every frame anyway so initialstate
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// snapshot constructed would have been the same as the last anyway.
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if (last.remoteTime > 0) snapshot = last;
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if (syncPosition) writer.WriteVector3(snapshot.position);
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if (syncRotation)
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{
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@ -209,9 +243,6 @@ public override void OnSerialize(NetworkWriter writer, bool initialState)
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Compression.ScaleToLong(snapshot.scale, scalePrecision, out Vector3Long quantized);
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DeltaCompression.Compress(writer, lastSerializedScale, quantized);
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}
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// int written = writer.Position - before;
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// Debug.Log($"{name} compressed to {written} bytes");
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}
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// save serialized as 'last' for next delta compression
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@ -294,12 +325,11 @@ protected virtual void OnClientToServerSync(Vector3? position, Quaternion? rotat
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RewriteHistory(
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serverSnapshots,
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connectionToClient.remoteTimeStamp,
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NetworkTime.localTime, // arrival remote timestamp. NOT remote timeline.
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NetworkServer.sendInterval, // Unity 2019 doesn't have timeAsDouble yet
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NetworkTime.localTime, // arrival remote timestamp. NOT remote timeline.
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NetworkServer.sendInterval * sendIntervalMultiplier, // Unity 2019 doesn't have timeAsDouble yet
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target.localPosition,
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target.localRotation,
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target.localScale);
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// Debug.Log($"{name}: corrected history on server to fix initial stutter after not sending for a while.");
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}
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// add a small timeline offset to account for decoupled arrival of
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@ -319,17 +349,16 @@ protected virtual void OnServerToClientSync(Vector3? position, Quaternion? rotat
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// 'only sync on change' needs a correction on every new move sequence.
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if (onlySyncOnChange &&
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NeedsCorrection(clientSnapshots, NetworkClient.connection.remoteTimeStamp, NetworkClient.sendInterval, onlySyncOnChangeCorrectionMultiplier))
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NeedsCorrection(clientSnapshots, NetworkClient.connection.remoteTimeStamp, NetworkClient.sendInterval * sendIntervalMultiplier, onlySyncOnChangeInterval))
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{
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RewriteHistory(
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clientSnapshots,
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NetworkClient.connection.remoteTimeStamp, // arrival remote timestamp. NOT remote timeline.
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NetworkTime.localTime, // Unity 2019 doesn't have timeAsDouble yet
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NetworkClient.sendInterval,
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NetworkClient.connection.remoteTimeStamp, // arrival remote timestamp. NOT remote timeline.
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NetworkTime.localTime, // Unity 2019 doesn't have timeAsDouble yet
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NetworkClient.sendInterval * sendIntervalMultiplier,
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target.localPosition,
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target.localRotation,
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target.localScale);
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// Debug.Log($"{name}: corrected history on client to fix initial stutter after not sending for a while.");
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}
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// add a small timeline offset to account for decoupled arrival of
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