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* Expose server build information * squash patches * final tweaks --------- Co-authored-by: Jake Potrebic <jake.m.potrebic@gmail.com> Co-authored-by: masmc05 <masmc05@gmail.com>
86 lines
5.4 KiB
Diff
86 lines
5.4 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Spottedleaf <Spottedleaf@users.noreply.github.com>
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Date: Tue, 20 Feb 2024 18:24:16 -0800
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Subject: [PATCH] Fix entity tracker desync when new players are added to the
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tracker
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The delta position packet instructs the client to update
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the entity position by a position difference. However, this position
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difference is relative to the last position in the entity tracker
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state, not the last position which has been sent to the player. As
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a result, if the last position the player has recorded is different
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than the one stored in the entity tracker (which occurs when a new
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player is added to an existing entity tracker state) then the sent
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position difference will cause a position desync for the client.
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We can resolve this problem by either tracking the last position
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sent per-player, or by simply resetting the last sent position
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in the entity tracker state every time a new player is added.
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Resetting the last sent position every time a new player is
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added to the tracker is just easier to do, so that is what
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this patch does.
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diff --git a/src/main/java/net/minecraft/server/level/ChunkMap.java b/src/main/java/net/minecraft/server/level/ChunkMap.java
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index dbe9df1e1973db133f7c8516256697ef7c968137..7fb9ba3dadb1eca4a1000ea8cf4d13fed2b7db1e 100644
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--- a/src/main/java/net/minecraft/server/level/ChunkMap.java
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+++ b/src/main/java/net/minecraft/server/level/ChunkMap.java
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@@ -1450,6 +1450,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
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this.serverEntity.addPairing(player);
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}
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// Paper end - entity tracking events
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+ this.serverEntity.onPlayerAdd(); // Paper - fix desync when a player is added to the tracker
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}
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} else if (this.seenBy.remove(player.connection)) {
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this.serverEntity.removePairing(player);
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diff --git a/src/main/java/net/minecraft/server/level/ServerEntity.java b/src/main/java/net/minecraft/server/level/ServerEntity.java
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index 4f103f731623a8570238a6867fda1c5f83fca4e4..f16a69775332a08ed0e87d27acd0fc959359694c 100644
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--- a/src/main/java/net/minecraft/server/level/ServerEntity.java
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+++ b/src/main/java/net/minecraft/server/level/ServerEntity.java
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@@ -97,6 +97,13 @@ public class ServerEntity {
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this.trackedDataValues = entity.getEntityData().getNonDefaultValues();
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}
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+ // Paper start - fix desync when a player is added to the tracker
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+ private boolean forceStateResync;
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+ public void onPlayerAdd() {
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+ this.forceStateResync = true;
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+ }
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+ // Paper end - fix desync when a player is added to the tracker
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+
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public void sendChanges() {
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List<Entity> list = this.entity.getPassengers();
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@@ -141,7 +148,7 @@ public class ServerEntity {
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}
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}
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- if (this.tickCount % this.updateInterval == 0 || this.entity.hasImpulse || this.entity.getEntityData().isDirty()) {
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+ 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
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int i;
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int j;
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@@ -177,13 +184,13 @@ public class ServerEntity {
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boolean flag4 = false;
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boolean flag5 = false;
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- if (!(this.entity instanceof net.minecraft.world.entity.decoration.HangingEntity) || this.tickCount > 0 || this.entity instanceof AbstractArrow) { // Paper - Always update position to fix first-tick teleports
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+ if (this.forceStateResync || !(this.entity instanceof net.minecraft.world.entity.decoration.HangingEntity) || this.tickCount > 0 || this.entity instanceof AbstractArrow) { // Paper - Always update position to fix first-tick teleports
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long k = this.positionCodec.encodeX(vec3d);
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long l = this.positionCodec.encodeY(vec3d);
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long i1 = this.positionCodec.encodeZ(vec3d);
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boolean flag6 = k < -32768L || k > 32767L || l < -32768L || l > 32767L || i1 < -32768L || i1 > 32767L;
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- if (!flag6 && this.teleportDelay <= 400 && !this.wasRiding && this.wasOnGround == this.entity.onGround()&& !(io.papermc.paper.configuration.GlobalConfiguration.get().collisions.sendFullPosForHardCollidingEntities && this.entity.hardCollides())) { // Paper - send full pos for hard colliding entities to prevent collision problems due to desync
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+ if (!this.forceStateResync && !flag6 && this.teleportDelay <= 400 && !this.wasRiding && this.wasOnGround == this.entity.onGround()&& !(io.papermc.paper.configuration.GlobalConfiguration.get().collisions.sendFullPosForHardCollidingEntities && this.entity.hardCollides())) { // Paper - send full pos for hard colliding entities to prevent collision problems due to desync
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if ((!flag2 || !flag3) && !(this.entity instanceof AbstractArrow)) {
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if (flag2) {
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packet1 = new ClientboundMoveEntityPacket.Pos(this.entity.getId(), (short) ((int) k), (short) ((int) l), (short) ((int) i1), this.entity.onGround());
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@@ -240,6 +247,7 @@ public class ServerEntity {
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}
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this.entity.hasImpulse = false;
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+ this.forceStateResync = false; // Paper - fix desync when a player is added to the tracker
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}
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++this.tickCount;
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