From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Martijn Muijsers <martijnmuijsers@live.nl>
Date: Wed, 23 Nov 2022 22:49:59 +0100
Subject: [PATCH] Use ThreadUnsafeRandom for mob spawning

Removed since 1.21

License: GPL-3.0 (https://www.gnu.org/licenses/gpl-3.0.html)
Gale - https://galemc.org

This patch is based on the following patch:
"Use thread unsafe random for mob spawning"
By: Paul Sauve <paul@technove.co>
As part of: Airplane (https://github.com/TECHNOVE/Airplane)
Licensed under: GPL-3.0 (https://www.gnu.org/licenses/gpl-3.0.html)

* Airplane copyright *

Airplane
Copyright (C) 2020 Technove LLC

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.

diff --git a/src/main/java/net/minecraft/world/level/NaturalSpawner.java b/src/main/java/net/minecraft/world/level/NaturalSpawner.java
index 7e707fe1d800debf1eef8800fe98eb4e1dbd800b..d0383cef6e204cc806903666d296287e1c530ed3 100644
--- a/src/main/java/net/minecraft/world/level/NaturalSpawner.java
+++ b/src/main/java/net/minecraft/world/level/NaturalSpawner.java
@@ -406,13 +406,14 @@ public final class NaturalSpawner {
         }
     }
 
-    private static BlockPos getRandomPosWithin(Level world, LevelChunk chunk) {
+    private static BlockPos getRandomPosWithin(ServerLevel world, LevelChunk chunk) { // Gale - Airplane - Use ThreadUnsafeRandom for mob spawning - accept ServerLevel
         ChunkPos chunkcoordintpair = chunk.getPos();
-        int i = chunkcoordintpair.getMinBlockX() + world.random.nextInt(16);
-        int j = chunkcoordintpair.getMinBlockZ() + world.random.nextInt(16);
+        // Gale start - Airplane - Use ThreadUnsafeRandom for mob spawning - use ThreadUnsafeRandom
+        int i = chunkcoordintpair.getMinBlockX() + world.randomTickRandom.nextInt(16);
+        int j = chunkcoordintpair.getMinBlockZ() + world.randomTickRandom.nextInt(16);
+        // Gale end - Airplane - Use ThreadUnsafeRandom for mob spawning - use ThreadUnsafeRandom
         int k = chunk.getHeight(Heightmap.Types.WORLD_SURFACE, i, j) + 1;
-        int l = Mth.randomBetweenInclusive(world.random, world.getMinBuildHeight(), k);
-
+        int l = Mth.randomBetweenInclusive(world.randomTickRandom, world.getMinBuildHeight(), k);  // Gale - Airplane - Use ThreadUnsafeRandom for mob spawning - use ThreadUnsafeRandom
         return new BlockPos(i, l, j);
     }