mirror of
https://github.com/PaperMC/Paper.git
synced 2024-11-22 15:17:17 +01:00
105 lines
6 KiB
Diff
105 lines
6 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
|
|
From: Spottedleaf <Spottedleaf@users.noreply.github.com>
|
|
Date: Tue, 20 Feb 2024 18:24:16 -0800
|
|
Subject: [PATCH] Fix entity tracker desync when new players are added to the
|
|
tracker
|
|
|
|
The delta position packet instructs the client to update
|
|
the entity position by a position difference. However, this position
|
|
difference is relative to the last position in the entity tracker
|
|
state, not the last position which has been sent to the player. As
|
|
a result, if the last position the player has recorded is different
|
|
than the one stored in the entity tracker (which occurs when a new
|
|
player is added to an existing entity tracker state) then the sent
|
|
position difference will cause a position desync for the client.
|
|
|
|
We can resolve this problem by either tracking the last position
|
|
sent per-player, or by simply resetting the last sent position
|
|
in the entity tracker state every time a new player is added.
|
|
Resetting the last sent position every time a new player is
|
|
added to the tracker is just easier to do, so that is what
|
|
this patch does.
|
|
|
|
This patch also fixes entities appearing to disappear when
|
|
teleporting to players by changing the initial position
|
|
in the spawn packet to the entities current tracking position.
|
|
When teleporting, the spawn packet will contain the old position
|
|
which is most likely in an unloaded chunk - which means that the
|
|
client will not tick the entity and thus not lerp the entity
|
|
from its old position to its new position.
|
|
|
|
diff --git a/src/main/java/net/minecraft/network/protocol/game/ClientboundAddEntityPacket.java b/src/main/java/net/minecraft/network/protocol/game/ClientboundAddEntityPacket.java
|
|
index 854baa554da2215a656f976ae2973341c3b2d61c..792b9a72a610cc512a8920d61013b6ba02f71e47 100644
|
|
--- a/src/main/java/net/minecraft/network/protocol/game/ClientboundAddEntityPacket.java
|
|
+++ b/src/main/java/net/minecraft/network/protocol/game/ClientboundAddEntityPacket.java
|
|
@@ -42,9 +42,11 @@ public class ClientboundAddEntityPacket implements Packet<ClientGamePacketListen
|
|
this(
|
|
entity.getId(),
|
|
entity.getUUID(),
|
|
- entityTrackerEntry.getPositionBase().x(),
|
|
- entityTrackerEntry.getPositionBase().y(),
|
|
- entityTrackerEntry.getPositionBase().z(),
|
|
+ // Paper start - fix entity tracker desync
|
|
+ entity.trackingPosition().x(),
|
|
+ entity.trackingPosition().y(),
|
|
+ entity.trackingPosition().z(),
|
|
+ // Paper end - fix entity tracker desync
|
|
entityTrackerEntry.getLastSentXRot(),
|
|
entityTrackerEntry.getLastSentYRot(),
|
|
entity.getType(),
|
|
diff --git a/src/main/java/net/minecraft/server/level/ChunkMap.java b/src/main/java/net/minecraft/server/level/ChunkMap.java
|
|
index 21370ed6c7d98d3f3546f0365ac50e5c26ba3bde..af8cb316ac169aa8d98a88765b85bb013b9ba961 100644
|
|
--- a/src/main/java/net/minecraft/server/level/ChunkMap.java
|
|
+++ b/src/main/java/net/minecraft/server/level/ChunkMap.java
|
|
@@ -1269,6 +1269,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
|
|
this.serverEntity.addPairing(player);
|
|
}
|
|
// Paper end - entity tracking events
|
|
+ this.serverEntity.onPlayerAdd(); // Paper - fix desync when a player is added to the tracker
|
|
}
|
|
} else if (this.seenBy.remove(player.connection)) {
|
|
this.serverEntity.removePairing(player);
|
|
diff --git a/src/main/java/net/minecraft/server/level/ServerEntity.java b/src/main/java/net/minecraft/server/level/ServerEntity.java
|
|
index 12d86f27d04bffed8c3844e36b42fbc2f84dacff..8ea2f24695f5dad55e21f238b69442513e7a90c6 100644
|
|
--- a/src/main/java/net/minecraft/server/level/ServerEntity.java
|
|
+++ b/src/main/java/net/minecraft/server/level/ServerEntity.java
|
|
@@ -96,6 +96,13 @@ public class ServerEntity {
|
|
this.trackedDataValues = entity.getEntityData().getNonDefaultValues();
|
|
}
|
|
|
|
+ // Paper start - fix desync when a player is added to the tracker
|
|
+ private boolean forceStateResync;
|
|
+ public void onPlayerAdd() {
|
|
+ this.forceStateResync = true;
|
|
+ }
|
|
+ // Paper end - fix desync when a player is added to the tracker
|
|
+
|
|
public void sendChanges() {
|
|
// Paper start - optimise collisions
|
|
if (((ca.spottedleaf.moonrise.patches.chunk_system.entity.ChunkSystemEntity)this.entity).moonrise$isHardColliding()) {
|
|
@@ -145,7 +152,7 @@ public class ServerEntity {
|
|
}
|
|
}
|
|
|
|
- if (this.tickCount % this.updateInterval == 0 || this.entity.hasImpulse || this.entity.getEntityData().isDirty()) {
|
|
+ if (this.forceStateResync || this.tickCount % this.updateInterval == 0 || this.entity.hasImpulse || this.entity.getEntityData().isDirty()) { // Paper - fix desync when a player is added to the tracker
|
|
int i;
|
|
int j;
|
|
|
|
@@ -185,7 +192,7 @@ public class ServerEntity {
|
|
long i1 = this.positionCodec.encodeZ(vec3d);
|
|
boolean flag6 = k < -32768L || k > 32767L || l < -32768L || l > 32767L || i1 < -32768L || i1 > 32767L;
|
|
|
|
- if (!flag6 && this.teleportDelay <= 400 && !this.wasRiding && this.wasOnGround == this.entity.onGround()) {
|
|
+ if (!this.forceStateResync && !flag6 && this.teleportDelay <= 400 && !this.wasRiding && this.wasOnGround == this.entity.onGround()) { // Paper - fix desync when a player is added to the tracker
|
|
if ((!flag2 || !flag3) && !(this.entity instanceof AbstractArrow)) {
|
|
if (flag2) {
|
|
packet1 = new ClientboundMoveEntityPacket.Pos(this.entity.getId(), (short) ((int) k), (short) ((int) l), (short) ((int) i1), this.entity.onGround());
|
|
@@ -249,6 +256,7 @@ public class ServerEntity {
|
|
}
|
|
|
|
this.entity.hasImpulse = false;
|
|
+ this.forceStateResync = false; // Paper - fix desync when a player is added to the tracker
|
|
}
|
|
|
|
++this.tickCount;
|