geforkt von Mirrors/Paper
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 ffec3deb9bcd31d51974c1deda2e76bc8374e5c5..a3d247c93ac1a2d872ff0e3841efc3d7b84fcbc1 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 * 4096.0);
|
|
+ return Math.round(value * 4096.0); // Paper - Fix MC-4; diff on change
|
|
}
|
|
|
|
@VisibleForTesting
|
|
static double decode(long value) {
|
|
- return (double)value / 4096.0;
|
|
+ return value / 4096.0; // 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..c3ca11cc4abe85132b099af1cb27772dbf40bfe1 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 * 4096.0) * (1 / 4096.0);
|
|
+ y = Mth.lfloor(y * 4096.0) * (1 / 4096.0);
|
|
+ z = Mth.lfloor(z * 4096.0) * (1 / 4096.0);
|
|
+ }
|
|
+ }
|
|
+ // 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);
|