From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Doc <nachito94@msn.com>
Date: Mon, 2 Aug 2021 11:24:39 -0400
Subject: [PATCH] Add configurable height for slime spawn


diff --git a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
index 100de7e366c4ea8ce158b0fc0258e4db0ee83249..b13d4dc311f25f9d3132697381e52beb06122b30 100644
--- a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
+++ b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
@@ -464,6 +464,16 @@ public class PaperWorldConfig {
         allChunksAreSlimeChunks = getBoolean("all-chunks-are-slime-chunks", false);
     }
 
+    public double slimeMaxSpawnHeightInSwamp = 70;
+    public double slimeMinSpawnHeightInSwamp = 50;
+    public double slimeMaxSpawnHeightInSlimeChunks = 40;
+    private void slimeSpawnHeight() {
+        slimeMaxSpawnHeightInSwamp = getDouble("slime-spawn-height.swamp-biome.maximum", this.slimeMaxSpawnHeightInSwamp);
+        slimeMinSpawnHeightInSwamp = getDouble("slime-spawn-height.swamp-biome.minimum", this.slimeMinSpawnHeightInSwamp);
+        slimeMaxSpawnHeightInSlimeChunks = getDouble("slime-spawn-height.slime-chunk.maximum", this.slimeMaxSpawnHeightInSlimeChunks);
+    }
+
+
     public int portalSearchRadius;
     public int portalCreateRadius;
     public boolean portalSearchVanillaDimensionScaling;
diff --git a/src/main/java/net/minecraft/world/entity/monster/Slime.java b/src/main/java/net/minecraft/world/entity/monster/Slime.java
index bdc6a7e6a9fcd467f653d53afd7ca2e33776fb06..e82bf53e1d31a5dd81713fe858d1e5d7b8f8c60d 100644
--- a/src/main/java/net/minecraft/world/entity/monster/Slime.java
+++ b/src/main/java/net/minecraft/world/entity/monster/Slime.java
@@ -320,7 +320,11 @@ public class Slime extends Mob implements Enemy {
 
     public static boolean checkSlimeSpawnRules(EntityType<Slime> type, LevelAccessor world, MobSpawnType spawnReason, BlockPos pos, RandomSource random) {
         if (world.getDifficulty() != Difficulty.PEACEFUL) {
-            if (world.getBiome(pos).is(BiomeTags.ALLOWS_SURFACE_SLIME_SPAWNS) && pos.getY() > 50 && pos.getY() < 70 && random.nextFloat() < 0.5F && random.nextFloat() < world.getMoonBrightness() && world.getMaxLocalRawBrightness(pos) <= random.nextInt(8)) {
+            // Paper start - Replace rules for Height in Swamp Biome
+            final double maxHeightSwamp = world.getMinecraftWorld().paperConfig.slimeMaxSpawnHeightInSwamp;
+            final double minHeightSwamp = world.getMinecraftWorld().paperConfig.slimeMinSpawnHeightInSwamp;
+            if (world.getBiome(pos).is(net.minecraft.world.level.biome.Biomes.SWAMP) && pos.getY() > minHeightSwamp && pos.getY() < maxHeightSwamp && random.nextFloat() < 0.5F && random.nextFloat() < world.getMoonBrightness() && world.getMaxLocalRawBrightness(pos) <= random.nextInt(8)) {
+                // Paper end
                 return checkMobSpawnRules(type, world, spawnReason, pos, random);
             }
 
@@ -331,7 +335,10 @@ public class Slime extends Mob implements Enemy {
             ChunkPos chunkcoordintpair = new ChunkPos(pos);
             boolean flag = world.getMinecraftWorld().paperConfig.allChunksAreSlimeChunks || WorldgenRandom.seedSlimeChunk(chunkcoordintpair.x, chunkcoordintpair.z, ((WorldGenLevel) world).getSeed(), world.getMinecraftWorld().spigotConfig.slimeSeed).nextInt(10) == 0; // Spigot // Paper
 
-            if (random.nextInt(10) == 0 && flag && pos.getY() < 40) {
+            // Paper start - Replace rules for Height in Slime Chunks
+            final double maxHeightSlimeChunk = world.getMinecraftWorld().paperConfig.slimeMaxSpawnHeightInSlimeChunks;
+            if (random.nextInt(10) == 0 && flag && pos.getY() < maxHeightSlimeChunk) {
+            // Paper end
                 return checkMobSpawnRules(type, world, spawnReason, pos, random);
             }
         }