be13705177
Upstream has released updates that appear to apply and compile correctly. This update has not been tested by PaperMC and as with ANY update, please do your own testing CraftBukkit Changes: 6b8cd9a7 SPIGOT-6207: forcibly drop the items of a converted zombie villager
85 lines
4.3 KiB
Diff
85 lines
4.3 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: BillyGalbreath <blake.galbreath@gmail.com>
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Date: Tue, 8 Dec 2020 20:24:52 -0600
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Subject: [PATCH] MC-4: Fix item position desync
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This fixes item position desync (MC-4) by running the item coordinates
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through the encode/decode methods of the packet that causes the precision
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loss, which forces the server to lose the same precision as the client
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keeping them in sync.
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diff --git a/src/main/java/com/destroystokyo/paper/PaperConfig.java b/src/main/java/com/destroystokyo/paper/PaperConfig.java
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index 652d87fc5d566dba8018c81676329f0e0bca471b..c56e7fb18f9a56c8025eb70a524f028b5942da37 100644
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--- a/src/main/java/com/destroystokyo/paper/PaperConfig.java
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+++ b/src/main/java/com/destroystokyo/paper/PaperConfig.java
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@@ -474,4 +474,9 @@ public class PaperConfig {
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private static void trackPluginScoreboards() {
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trackPluginScoreboards = getBoolean("settings.track-plugin-scoreboards", false);
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}
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+
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+ public static boolean fixEntityPositionDesync = true;
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+ private static void fixEntityPositionDesync() {
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+ fixEntityPositionDesync = getBoolean("settings.fix-entity-position-desync", fixEntityPositionDesync);
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+ }
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}
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diff --git a/src/main/java/net/minecraft/network/protocol/game/PacketPlayOutEntity.java b/src/main/java/net/minecraft/network/protocol/game/PacketPlayOutEntity.java
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index e80429368afced0299d9f41b97251cd6c64b1759..0eed10a6c4e0c7245f219d19ed1e2e5c94364db9 100644
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--- a/src/main/java/net/minecraft/network/protocol/game/PacketPlayOutEntity.java
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+++ b/src/main/java/net/minecraft/network/protocol/game/PacketPlayOutEntity.java
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@@ -19,11 +19,11 @@ public class PacketPlayOutEntity implements Packet<PacketListenerPlayOut> {
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protected boolean i;
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public static long a(double d0) {
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- return MathHelper.d(d0 * 4096.0D);
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+ return MathHelper.d(d0 * 4096.0D); // Paper - check EntityItem#setPositionRaw on update
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}
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public static Vec3D a(long i, long j, long k) {
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- return (new Vec3D((double) i, (double) j, (double) k)).a(2.44140625E-4D);
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+ return (new Vec3D((double) i, (double) j, (double) k)).a(2.44140625E-4D); // Paper - check EntityItem#setPositionRaw on update
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}
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public PacketPlayOutEntity() {}
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diff --git a/src/main/java/net/minecraft/util/MathHelper.java b/src/main/java/net/minecraft/util/MathHelper.java
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index caa628417bb9c1c65b037e4f3f762b08272c6d09..cc566784c7dd21cc2c44e0f351347f657e57ddcf 100644
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--- a/src/main/java/net/minecraft/util/MathHelper.java
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+++ b/src/main/java/net/minecraft/util/MathHelper.java
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@@ -9,7 +9,7 @@ import net.minecraft.core.BaseBlockPosition;
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public class MathHelper {
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public static final float a = c(2.0F);
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- private static final float[] b = (float[]) SystemUtils.a((Object) (new float[65536]), (afloat) -> {
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+ private static final float[] b = (float[]) SystemUtils.a((new float[65536]), (afloat) -> { // Paper - decompile error
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for (int i = 0; i < afloat.length; ++i) {
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afloat[i] = (float) Math.sin((double) i * 3.141592653589793D * 2.0D / 65536.0D);
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}
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@@ -49,6 +49,7 @@ public class MathHelper {
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return d0 < (double) i ? i - 1 : i;
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}
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+ public static long floorLong(double d0) { return d(d0); } // Paper - OBFHELPER
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public static long d(double d0) {
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long i = (long) d0;
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diff --git a/src/main/java/net/minecraft/world/entity/item/EntityItem.java b/src/main/java/net/minecraft/world/entity/item/EntityItem.java
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index 11e029f6f97f1dd9c32e311d1a3800f2fa54b91f..575833807ff647f30d7c2b7abcd01701c7dec85b 100644
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--- a/src/main/java/net/minecraft/world/entity/item/EntityItem.java
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+++ b/src/main/java/net/minecraft/world/entity/item/EntityItem.java
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@@ -550,4 +550,16 @@ public class EntityItem extends Entity {
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public Packet<?> P() {
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return new PacketPlayOutSpawnEntity(this);
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}
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+
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+ // Paper start - fix MC-4
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+ public void setPositionRaw(double x, double y, double z) {
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+ if (com.destroystokyo.paper.PaperConfig.fixEntityPositionDesync) {
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+ // encode/decode from PacketPlayOutEntity
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+ x = MathHelper.floorLong(x * 4096.0D) * (1 / 4096.0D);
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+ y = MathHelper.floorLong(y * 4096.0D) * (1 / 4096.0D);
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+ z = MathHelper.floorLong(z * 4096.0D) * (1 / 4096.0D);
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+ }
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+ super.setPositionRaw(x, y, z);
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+ }
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+ // Paper end - fix MC-4
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}
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