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Readd mc-4 fix

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This commit is contained in:
Owen1212055 2022-06-11 10:41:59 +02:00
parent 1762939321
commit 624ed50aa0
3 changed files with 53 additions and 4 deletions
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4
patches/server/Detail-more-information-in-watchdog-dumps.patch
View file

@ -194,8 +194,8 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
public void setDeltaMovement(double x, double y, double z) {
@@ -0,0 +0,0 @@ public abstract class Entity implements Nameable, EntityAccess, CommandSource {
public final void setPosRaw(double x, double y, double z, boolean forceBoundingBoxUpdate) {
// Paper end
}
// Paper end - fix MC-4
if (this.position.x != x || this.position.y != y || this.position.z != z) {
+ synchronized (this.posLock) { // Paper
this.position = new Vec3(x, y, z);

4
patches/server/Guard-against-invalid-entity-positions.patch
View file

@ -41,5 +41,5 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
+ }
+ // Paper end - block invalid positions
// Paper end
if (this.position.x != x || this.position.y != y || this.position.z != z) {
synchronized (this.posLock) { // Paper
// Paper start - fix MC-4
if (this instanceof ItemEntity) {

49
patches/server/MC-4-Fix-item-position-desync.patch Normal file
View file

@ -0,0 +1,49 @@
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: BillyGalbreath <blake.galbreath@gmail.com>
Date: Tue, 8 Dec 2020 20:24:52 -0600
Subject: [PATCH] MC-4: Fix item position desync
This fixes item position desync (MC-4) by running the item coordinates
through the encode/decode methods of the packet that causes the precision
loss, which forces the server to lose the same precision as the client
keeping them in sync.
diff --git a/src/main/java/net/minecraft/network/protocol/game/VecDeltaCodec.java b/src/main/java/net/minecraft/network/protocol/game/VecDeltaCodec.java
index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
--- a/src/main/java/net/minecraft/network/protocol/game/VecDeltaCodec.java
+++ b/src/main/java/net/minecraft/network/protocol/game/VecDeltaCodec.java
@@ -0,0 +0,0 @@ public class VecDeltaCodec {
public Vec3 base = Vec3.ZERO; // Paper
private static long encode(double value) {
- return Mth.lfloor(value * 4096.0D);
+ return Mth.lfloor(value * 4096.0D); // Paper - check ItemEntity#setPosRaw on update
}
private static double decode(long value) {
- return (double)value / 4096.0D;
+ return (double)value / 4096.0D; // Paper - check ItemEntity#setPosRaw on update
}
public Vec3 decode(long x, long y, long z) {
diff --git a/src/main/java/net/minecraft/world/entity/Entity.java b/src/main/java/net/minecraft/world/entity/Entity.java
index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
--- a/src/main/java/net/minecraft/world/entity/Entity.java
+++ b/src/main/java/net/minecraft/world/entity/Entity.java
@@ -0,0 +0,0 @@ public abstract class Entity implements Nameable, EntityAccess, CommandSource {
}
public final void setPosRaw(double x, double y, double z, boolean forceBoundingBoxUpdate) {
// Paper end
+ // Paper start - fix MC-4
+ if (this instanceof ItemEntity) {
+ if (io.papermc.paper.configuration.GlobalConfiguration.get().misc.fixEntityPositionDesync) {
+ // encode/decode from PacketPlayOutEntity
+ x = Mth.lfloor(x * 4096.0D) * (1 / 4096.0D);
+ y = Mth.lfloor(y * 4096.0D) * (1 / 4096.0D);
+ z = Mth.lfloor(z * 4096.0D) * (1 / 4096.0D);
+ }
+ }
+ // Paper end - fix MC-4
if (this.position.x != x || this.position.y != y || this.position.z != z) {
this.position = new Vec3(x, y, z);
int i = Mth.floor(x);