From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: JellySquid <jellysquid+atwork@protonmail.com>
Date: Mon, 11 May 2020 21:00:44 +0200
Subject: [PATCH] lithium MixinDirection

Original code by JellySquid, licensed under GNU Lesser General Public License v3.0
you can find the original code on https://github.com/CaffeineMC/lithium-fabric/ (Yarn mappings)

diff --git a/src/main/java/net/minecraft/server/EnumDirection.java b/src/main/java/net/minecraft/server/EnumDirection.java
index 814b168eaa4b74dce2b83bc8aa557b33aebf35fa..74e95bfcae5212c77383f7b8780dce293fda02dc 100644
--- a/src/main/java/net/minecraft/server/EnumDirection.java
+++ b/src/main/java/net/minecraft/server/EnumDirection.java
@@ -20,13 +20,13 @@ public enum EnumDirection implements INamable {
     DOWN(0, 1, -1, "down", EnumDirection.EnumAxisDirection.NEGATIVE, EnumDirection.EnumAxis.Y, new BaseBlockPosition(0, -1, 0)), UP(1, 0, -1, "up", EnumDirection.EnumAxisDirection.POSITIVE, EnumDirection.EnumAxis.Y, new BaseBlockPosition(0, 1, 0)), NORTH(2, 3, 2, "north", EnumDirection.EnumAxisDirection.NEGATIVE, EnumDirection.EnumAxis.Z, new BaseBlockPosition(0, 0, -1)), SOUTH(3, 2, 0, "south", EnumDirection.EnumAxisDirection.POSITIVE, EnumDirection.EnumAxis.Z, new BaseBlockPosition(0, 0, 1)), WEST(4, 5, 1, "west", EnumDirection.EnumAxisDirection.NEGATIVE, EnumDirection.EnumAxis.X, new BaseBlockPosition(-1, 0, 0)), EAST(5, 4, 3, "east", EnumDirection.EnumAxisDirection.POSITIVE, EnumDirection.EnumAxis.X, new BaseBlockPosition(1, 0, 0));
 
     private final int g;
-    private final int h;
+    private final int h; // Yatopia this is idOpposit(yarn)
     private final int i;
     private final String j;
     private final EnumDirection.EnumAxis k;
     private final EnumDirection.EnumAxisDirection l;
     private final BaseBlockPosition m;
-    private static final EnumDirection[] n = values();
+    private static final EnumDirection[] n = values(); private static final EnumDirection[] ALL = n;// Yatopia OBF HELPER
     private static final Map<String, EnumDirection> o = (Map) Arrays.stream(EnumDirection.n).collect(Collectors.toMap(EnumDirection::m, (enumdirection) -> {
         return enumdirection;
     }));
@@ -108,8 +108,12 @@ public enum EnumDirection implements INamable {
         return this.l;
     }
 
+    /**
+     * @reason Avoid the modulo/abs operations
+     * @author JellySquid
+     */
     public EnumDirection opposite() {
-        return fromType1(this.h);
+        return ALL[this.h];
     }
 
     public EnumDirection rotateCW() { return g(); } // Purpur - OBFHELPER
@@ -210,8 +214,12 @@ public enum EnumDirection implements INamable {
         return (float) ((this.i & 3) * 90);
     }
 
+    /**
+     * @reason Do not allocate an excessive number of Direction arrays
+     * @author JellySquid
+     */
     public static EnumDirection a(Random random) {
-        return (EnumDirection) SystemUtils.a((Object[]) EnumDirection.n, random);
+        return ALL[random.nextInt(ALL.length)];
     }
 
     public static EnumDirection a(double d0, double d1, double d2) {
