1 files changed, 38 insertions, 0 deletions
diff --git a/patches/server/0771-Send-full-pos-packets-for-hard-colliding-entities.patch b/patches/server/0771-Send-full-pos-packets-for-hard-colliding-entities.patch
new file mode 100644
index 0000000000..af1611e279
--- /dev/null
+++ b/patches/server/0771-Send-full-pos-packets-for-hard-colliding-entities.patch
@@ -0,0 +1,38 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Spottedleaf <[email protected]>
+Date: Tue, 16 Feb 2021 00:16:56 -0800
+Subject: [PATCH] Send full pos packets for hard colliding entities
+
+Prevent collision problems due to desync (i.e boats)
+
+Configurable under
+`send-full-pos-for-hard-colliding-entities`
+
+diff --git a/src/main/java/com/destroystokyo/paper/PaperConfig.java b/src/main/java/com/destroystokyo/paper/PaperConfig.java
+index f34ae86812b13a96b509724591a75c1aacd5e918..eaa1d5491ef3f5caf156d16fa7544741e53c6bab 100644
+--- a/src/main/java/com/destroystokyo/paper/PaperConfig.java
++++ b/src/main/java/com/destroystokyo/paper/PaperConfig.java
+@@ -622,4 +622,10 @@ public class PaperConfig {
+     private static void lagCompensateBlockBreaking() {
+         lagCompensateBlockBreaking = getBoolean("settings.lag-compensate-block-breaking", true);
+     }
++
++    public static boolean sendFullPosForHardCollidingEntities;
++
++    private static void sendFullPosForHardCollidingEntities() {
++        sendFullPosForHardCollidingEntities = getBoolean("settings.send-full-pos-for-hard-colliding-entities", true);
++    }
+ }
+diff --git a/src/main/java/net/minecraft/server/level/ServerEntity.java b/src/main/java/net/minecraft/server/level/ServerEntity.java
+index 94704a258ce7183aeb0ccec0b9106e40efd08821..703ac671b19636859648f16a5431b2700791e7d5 100644
+--- a/src/main/java/net/minecraft/server/level/ServerEntity.java
++++ b/src/main/java/net/minecraft/server/level/ServerEntity.java
+@@ -172,7 +172,7 @@ public class ServerEntity {
+                     // Paper end - remove allocation of Vec3D here
+                     boolean flag4 = k < -32768L || k > 32767L || l < -32768L || l > 32767L || i1 < -32768L || i1 > 32767L;
+ 
+-                    if (!flag4 && this.teleportDelay <= 400 && !this.wasRiding && this.wasOnGround == this.entity.isOnGround()) {
++                    if (!flag4 && this.teleportDelay <= 400 && !this.wasRiding && this.wasOnGround == this.entity.isOnGround() && !(com.destroystokyo.paper.PaperConfig.sendFullPosForHardCollidingEntities && this.entity.hardCollides())) { // Paper - send full pos for hard colliding entities to prevent collision problems due to desync
+                         if ((!flag2 || !flag3) && !(this.entity instanceof AbstractArrow)) {
+                             if (flag2) {
+                                 packet1 = new ClientboundMoveEntityPacket.Pos(this.entity.getId(), (short) ((int) k), (short) ((int) l), (short) ((int) i1), this.entity.isOnGround());