From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Fortern <blueten.ki@gmail.com>
Date: Mon, 29 Sep 2025 10:24:45 +0800
Subject: [PATCH] Do not check NaN values in entities


diff --git a/net/minecraft/world/entity/Entity.java b/net/minecraft/world/entity/Entity.java
index d9fe2e6d424231c7acd15cd5bb6a05afa2e263c6..50c143bb15108f02918fbacdff1eebfc14ee8aa6 100644
--- a/net/minecraft/world/entity/Entity.java
+++ b/net/minecraft/world/entity/Entity.java
@@ -2561,10 +2561,12 @@ public abstract class Entity implements SyncedDataHolder, DebugValueSource, Name
             }
             } // CraftBukkit
 
-            this.setDeltaMovement(io.papermc.paper.util.MCUtil.sanitizeNanInf(this.deltaMovement, 0D)); // Paper - remove NaN values before usage in saving
+            // Leaves start - Do not check NaN values
+            // this.setDeltaMovement(io.papermc.paper.util.MCUtil.sanitizeNanInf(this.deltaMovement, 0D)); // Paper - remove NaN values before usage in saving // Leaves - Do not check NaN values
             output.store("Motion", Vec3.CODEC, this.getDeltaMovement());
             // CraftBukkit start - Checking for NaN pitch/yaw and resetting to zero
             // TODO: make sure this is the best way to address this.
+            /*
             if (Float.isNaN(this.yRot)) {
                 this.yRot = 0;
             }
@@ -2572,7 +2574,9 @@ public abstract class Entity implements SyncedDataHolder, DebugValueSource, Name
             if (Float.isNaN(this.xRot)) {
                 this.xRot = 0;
             }
+            */
             // CraftBukkit end
+            // Leaves end - Do not check NaN values
             output.store("Rotation", Vec2.CODEC, new Vec2(this.getYRot(), this.getXRot()));
             output.putDouble("fall_distance", this.fallDistance);
             output.putShort("Fire", (short)this.remainingFireTicks);
@@ -2695,7 +2699,7 @@ public abstract class Entity implements SyncedDataHolder, DebugValueSource, Name
     public void load(ValueInput input) {
         try {
             Vec3 vec3 = input.read("Pos", Vec3.CODEC).orElse(Vec3.ZERO);
-            Vec3 vec31 = input.read("Motion", Vec3.CODEC).orElse(Vec3.ZERO); vec31 = io.papermc.paper.util.MCUtil.sanitizeNanInf(vec31, 0D); // Paper - avoid setting NaN values
+            Vec3 vec31 = input.read("Motion", Vec3.CODEC).orElse(Vec3.ZERO); // vec31 = io.papermc.paper.util.MCUtil.sanitizeNanInf(vec31, 0D); // Paper - avoid setting NaN values // Leaves - Do not check NaN values
             Vec2 vec2 = input.read("Rotation", Vec2.CODEC).orElse(Vec2.ZERO);
             this.setDeltaMovement(Math.abs(vec31.x) > 10.0 ? 0.0 : vec31.x, Math.abs(vec31.y) > 10.0 ? 0.0 : vec31.y, Math.abs(vec31.z) > 10.0 ? 0.0 : vec31.z);
             this.hasImpulse = true;