Skip movement if zero

Author: HaHaWTH

patches/server/0164-vmp-skip-movement-if-zero.patch

@@ -0,0 +1,36 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: HaHaWTH <id_cn00@outlook.com>
+Date: Sun, 7 Apr 2024 15:56:44 +0800
+Subject: [PATCH] vmp-skip-movement-if-zero
+
+
+diff --git a/src/main/java/net/minecraft/server/Entity.java b/src/main/java/net/minecraft/server/Entity.java
+index 48b61992a45784c7e6201be373e36104face7b85..e067703eb34ec85c3419e9e40647a8270a461eb0 100644
+--- a/src/main/java/net/minecraft/server/Entity.java
++++ b/src/main/java/net/minecraft/server/Entity.java
+@@ -198,6 +198,7 @@ public abstract class Entity implements ICommandListener, KeyedObject { // Paper
+     private boolean isInLava;
+     private int lastLavaCheck = -1;
+     // Beast end
++    private boolean isBoundingBoxChanged = false; // Beast - VMP optimization
+     public EnumMoveType moveType; // Beast - EntityMoveEvent
+ 
+     // Beast start - Cache current block pos
+@@ -608,6 +609,9 @@ public abstract class Entity implements ICommandListener, KeyedObject { // Paper
+     }
+ 
+     public void move(EnumMoveType enummovetype, double d0, double d1, double d2) {
++        if (!isBoundingBoxChanged && d0 == 0.0D && d1 == 0.0D && d2 == 0.0D) {
++            return;
++        }
+         this.moveType = enummovetype; // Beast - EntityMoveEvent
+         if (this.noclip) {
+             this.a(this.getBoundingBox().d(d0, d1, d2));
+@@ -2791,6 +2795,7 @@ public abstract class Entity implements ICommandListener, KeyedObject { // Paper
+     }
+ 
+     public void a(AxisAlignedBB axisalignedbb) {
++        if (!this.boundingBox.equals(axisalignedbb)) isBoundingBoxChanged = true;
+         // CraftBukkit start - block invalid bounding boxes
+         double a = axisalignedbb.a,
+                 b = axisalignedbb.b,