Mirror von
https://github.com/PaperMC/Paper.git
synchronisiert 2024-11-15 12:30:06 +01:00
51 Zeilen
2.5 KiB
Diff
51 Zeilen
2.5 KiB
Diff
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 05ac41e136da43284fb24a6b698ebd36318278fb..3c4ac79c094dc2fff7de94150a34b7bf814ac0de 100644
|
|
--- a/src/main/java/net/minecraft/network/protocol/game/VecDeltaCodec.java
|
|
+++ b/src/main/java/net/minecraft/network/protocol/game/VecDeltaCodec.java
|
|
@@ -9,12 +9,12 @@ public class VecDeltaCodec {
|
|
|
|
@VisibleForTesting
|
|
static long encode(double value) {
|
|
- return Math.round(value * 4096.0D);
|
|
+ return Math.round(value * 4096.0D); // Paper - Fix MC-4; diff on change
|
|
}
|
|
|
|
@VisibleForTesting
|
|
static double decode(long value) {
|
|
- return (double)value / 4096.0D;
|
|
+ return (double)value / 4096.0D; // Paper - Fix MC-4; diff on change
|
|
}
|
|
|
|
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 82ccfd91dfd3cce35a35edf8f73ccdd1ddd1fd6a..18cf11ddcf51e8b6251fd6df97f85e0ed15900c4 100644
|
|
--- a/src/main/java/net/minecraft/world/entity/Entity.java
|
|
+++ b/src/main/java/net/minecraft/world/entity/Entity.java
|
|
@@ -4186,6 +4186,16 @@ public abstract class Entity implements Nameable, EntityAccess, CommandSource, S
|
|
return;
|
|
}
|
|
// Paper end - Block invalid positions and bounding box
|
|
+ // Paper start - Fix MC-4
|
|
+ if (this instanceof ItemEntity) {
|
|
+ if (io.papermc.paper.configuration.GlobalConfiguration.get().misc.fixEntityPositionDesync) {
|
|
+ // encode/decode from ClientboundMoveEntityPacket
|
|
+ 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);
|