Files
Purpur/patches/server/0117-MC-4-Fix-Item-position-desync.patch
William Blake Galbreath a29baddb7d Updated Upstream (Paper)
Upstream has released updates that appears to apply and compile correctly

Paper Changes:
d33ba160 Fix incorrect keyword use on visibleChunksClone
2f343015 Updated Upstream (Bukkit/CraftBukkit)
a65831bd Optimize PlayerChunkMap memory use for visibleChunks
2020-04-08 23:13:56 -05:00

64 lines
3.4 KiB
Diff

From bf9f69ee5bce7695393d8e5a7be25c4bfb19817d Mon Sep 17 00:00:00 2001
From: William Blake Galbreath <blake.galbreath@gmail.com>
Date: Sat, 6 Jul 2019 21:12:58 -0500
Subject: [PATCH] MC-4 Fix - Item position desync
---
src/main/java/net/minecraft/server/EntityTrackerEntry.java | 6 ++++++
src/main/java/net/minecraft/server/PacketPlayOutEntity.java | 2 ++
src/main/java/net/pl3x/purpur/PurpurConfig.java | 2 ++
3 files changed, 10 insertions(+)
diff --git a/src/main/java/net/minecraft/server/EntityTrackerEntry.java b/src/main/java/net/minecraft/server/EntityTrackerEntry.java
index 1f7c8f7da0..1589b46b75 100644
--- a/src/main/java/net/minecraft/server/EntityTrackerEntry.java
+++ b/src/main/java/net/minecraft/server/EntityTrackerEntry.java
@@ -126,6 +126,12 @@ public class EntityTrackerEntry {
j = MathHelper.d(this.tracker.pitch * 256.0F / 360.0F);
Vec3D vec3d = this.tracker.getPositionVector().d(PacketPlayOutEntity.a(this.xLoc, this.yLoc, this.zLoc));
boolean flag1 = vec3d.g() >= 7.62939453125E-6D;
+ // Purpur start - fixes MC-4
+ if (net.pl3x.purpur.PurpurConfig.fixItemPositionDesync && this.tracker instanceof EntityItem) {
+ Vec3D loc = PacketPlayOutEntity.decrypt(PacketPlayOutEntity.encrypt(tracker.locX()), PacketPlayOutEntity.encrypt(tracker.locY()), PacketPlayOutEntity.encrypt(tracker.locZ()));
+ tracker.setPosition(loc.getX(), loc.getY(), loc.getZ());
+ }
+ // Purpur end
Packet<?> packet1 = null;
boolean flag2 = flag1 || this.tickCounter % 60 == 0;
boolean flag3 = Math.abs(i - this.yRot) >= 1 || Math.abs(j - this.xRot) >= 1;
diff --git a/src/main/java/net/minecraft/server/PacketPlayOutEntity.java b/src/main/java/net/minecraft/server/PacketPlayOutEntity.java
index 5b1d959354..0010448e3a 100644
--- a/src/main/java/net/minecraft/server/PacketPlayOutEntity.java
+++ b/src/main/java/net/minecraft/server/PacketPlayOutEntity.java
@@ -14,10 +14,12 @@ public class PacketPlayOutEntity implements Packet<PacketListenerPlayOut> {
protected boolean h;
protected boolean i;
+ public static long encrypt(double d) { return a(d); } // Purpur - OBFHELPER
public static long a(double d0) {
return MathHelper.d(d0 * 4096.0D);
}
+ public static Vec3D decrypt(long x, long y, long z) { return a(x, y, z); } // Purpur - OBFHELPER
public static Vec3D a(long i, long j, long k) {
return (new Vec3D((double) i, (double) j, (double) k)).a(2.44140625E-4D);
}
diff --git a/src/main/java/net/pl3x/purpur/PurpurConfig.java b/src/main/java/net/pl3x/purpur/PurpurConfig.java
index 0c4c4ee9d2..6a3723202c 100644
--- a/src/main/java/net/pl3x/purpur/PurpurConfig.java
+++ b/src/main/java/net/pl3x/purpur/PurpurConfig.java
@@ -166,8 +166,10 @@ public class PurpurConfig {
}
public static boolean dontSendUselessEntityPackets = false;
+ public static boolean fixItemPositionDesync = false;
private static void dontSendUselessEntityPackets() {
dontSendUselessEntityPackets = getBoolean("settings.dont-send-useless-entity-packets", dontSendUselessEntityPackets);
+ fixItemPositionDesync = getBoolean("settings.fix-item-position-desync", fixItemPositionDesync);
}
public static boolean barrelSixRows = false;
--
2.24.0