PaperMC/Remapped-Spigot-Server-Patches/0666-Inline-shift-direction-fields.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Andrew Steinborn <git@steinborn.me>
Date: Mon, 18 Jan 2021 20:45:25 -0500
Subject: [PATCH] Inline shift direction fields

Removes a layer of indirection for EnumDirection.getAdjacent(X|Y|Z)(), which is in the
critical section for much of the server, including the lighting engine.

diff --git a/src/main/java/net/minecraft/core/Direction.java b/src/main/java/net/minecraft/core/Direction.java
index 3ebc62fe93a0cd0048e07b0343fc724f2c056010..51217f7e5288162b8e76c8717506b393cd262537 100644
--- a/src/main/java/net/minecraft/core/Direction.java
+++ b/src/main/java/net/minecraft/core/Direction.java
@@ -53,6 +53,11 @@ public enum Direction implements StringRepresentable {
     }, (enumdirection, enumdirection1) -> {
         throw new IllegalArgumentException("Duplicate keys");
     }, Long2ObjectOpenHashMap::new));
+    // Paper start
+    private final int adjX;
+    private final int adjY;
+    private final int adjZ;
+    // Paper end
 
     private Direction(int i, int j, int k, String s, Direction.AxisDirection enumdirection_enumaxisdirection, Direction.Axis enumdirection_enumaxis, Vec3i baseblockposition) {
         this.data3d = i;
@@ -62,6 +67,11 @@ public enum Direction implements StringRepresentable {
         this.axis = enumdirection_enumaxis;
         this.axisDirection = enumdirection_enumaxisdirection;
         this.normal = baseblockposition;
+        // Paper start
+        this.adjX = baseblockposition.getX();
+        this.adjY = baseblockposition.getY();
+        this.adjZ = baseblockposition.getZ();
+        // Paper end
     }
 
     public static Direction[] orderedByNearest(Entity entity) {
@@ -137,15 +147,15 @@ public enum Direction implements StringRepresentable {
     }
 
     public int getStepX() {
-        return this.normal.getX();
+        return this.adjX; // Paper
     }
 
     public int getStepY() {
-        return this.normal.getY();
+        return this.adjY; // Paper
     }
 
     public int getStepZ() {
-        return this.normal.getZ();
+        return this.adjZ; // Paper
     }
 
     public String getName() {