Paper-Old/patches/unapplied/server/0720-Update-head-rotation-in-missing-places.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Owen1212055 <23108066+Owen1212055@users.noreply.github.com>
Date: Mon, 21 Jun 2021 21:55:23 -0400
Subject: [PATCH] Update head rotation in missing places

In certain areas the player's head rotation could be desynced when teleported/moved.
This is because bukkit uses a separate head rotation field for yaw.
This issue only applies to players.

diff --git a/src/main/java/net/minecraft/world/entity/Entity.java b/src/main/java/net/minecraft/world/entity/Entity.java
index 0e494502bc6d52f277d240d839e02b51fccf05fc..61a3f7984e798191c74e85a514ca1ecde70e03ba 100644
--- a/src/main/java/net/minecraft/world/entity/Entity.java
+++ b/src/main/java/net/minecraft/world/entity/Entity.java
@@ -1903,6 +1903,7 @@ public abstract class Entity implements Nameable, EntityAccess, CommandSource {
         this.setXRot(Mth.clamp(pitch, -90.0F, 90.0F) % 360.0F);
         this.yRotO = this.getYRot();
         this.xRotO = this.getXRot();
+        this.setYHeadRot(yaw); // Paper - Update head rotation
     }
 
     public void absMoveTo(double x, double y, double z) {
@@ -1941,6 +1942,7 @@ public abstract class Entity implements Nameable, EntityAccess, CommandSource {
         this.setXRot(pitch);
         this.setOldPosAndRot();
         this.reapplyPosition();
+        this.setYHeadRot(yaw); // Paper - Update head rotation
     }
 
     public final void setOldPosAndRot() {