From 8ad02104293ddc3e4d3f91bb859a070c2ae58250 Mon Sep 17 00:00:00 2001
From: FabiFNA <64425534+FabiFNA@users.noreply.github.com>
Date: Thu, 9 Jul 2026 01:12:44 +0200
Subject: [PATCH] Fix Player Model HUD corrupting entity head rotation
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

## Type of change
- [x] Bug fix

## Description
`HudRenderer.entity()` temporarily overwrites the rendered entity's rotation
fields to pose the Player Model HUD element, then restores them. The restore of
the head-yaw fields was swapped:
- `yHeadRot` (current) was restored from the saved *previous* value
- `yHeadRotO` (previous) was restored from the saved *current* value

So every frame the element is drawn, the entity's current and previous head yaw
are exchanged, corrupting the head-rotation interpolation used by the world
renderer. `yBodyRot` is restored correctly, so only head rotation is affected.
This restores each field to its own saved value.

## Related issues
None linked — reproducible whenever the Player Model HUD element is enabled.

# How Has This Been Tested?
With the Player Model element enabled, head/body rotation visibly stutters when
turning in a boat or on a horse and when looking at your own head in F5. Disabling
only the Player Model element stops it. After this change the stuttering is gone and
the element still renders correctly.

# Checklist:
- [x] My code follows the style guidelines of this project.
- [x] I have added comments to my code in more complex areas.
- [x] I have tested the code in both development and production environments.
---
 .../meteorclient/systems/hud/HudRenderer.java                 | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/main/java/meteordevelopment/meteorclient/systems/hud/HudRenderer.java b/src/main/java/meteordevelopment/meteorclient/systems/hud/HudRenderer.java
index 4f13c5bcbac..23fd77f1860 100644
--- a/src/main/java/meteordevelopment/meteorclient/systems/hud/HudRenderer.java
+++ b/src/main/java/meteordevelopment/meteorclient/systems/hud/HudRenderer.java
@@ -241,8 +241,8 @@ public void entity(LivingEntity entity, int x, int y, int width, int height, flo
         entity.yBodyRot = previousBodyYaw;
         entity.setYRot(previousYaw);
         entity.setXRot(previousPitch);
-        entity.yHeadRot = lastLastHeadYaw;
-        entity.yHeadRotO = lastHeadYaw;
+        entity.yHeadRot = lastHeadYaw;
+        entity.yHeadRotO = lastLastHeadYaw;
 
         float s = 1.0f / mc.getWindow().getGuiScale();
         int x1 = (int) (x * s);