Paper/patches/server/0783-Configurable-feature-seeds.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Nassim Jahnke <jahnke.nassim@gmail.com>
Date: Tue, 31 Aug 2021 17:05:27 +0200
Subject: [PATCH] Configurable feature seeds

Co-authored-by: Thonk <30448663+ExcessiveAmountsOfZombies@users.noreply.github.com>

diff --git a/src/main/java/co/aikar/timings/TimingsExport.java b/src/main/java/co/aikar/timings/TimingsExport.java
index 46297ac0a19fd2398ab777a381eff4d0a256161e..78280fb3bcd8d792a58ece6d735e0824ea4be536 100644
--- a/src/main/java/co/aikar/timings/TimingsExport.java
+++ b/src/main/java/co/aikar/timings/TimingsExport.java
@@ -283,7 +283,7 @@ public class TimingsExport extends Thread {
         JSONObject object = new JSONObject();
         for (String key : config.getKeys(false)) {
             String fullKey = (parentKey != null ? parentKey + "." + key : key);
-            if (fullKey.equals("database") || fullKey.equals("settings.bungeecord-addresses") || TimingsManager.hiddenConfigs.contains(fullKey) || key.startsWith("seed-") || key.equals("worldeditregentempworld")) {
+            if (fullKey.equals("database") || fullKey.equals("settings.bungeecord-addresses") || TimingsManager.hiddenConfigs.contains(fullKey) || key.startsWith("seed-") || key.equals("worldeditregentempworld") || key.equals("feature-seeds")) {
                 continue;
             }
             final Object val = config.get(key);
diff --git a/src/main/java/net/minecraft/world/level/chunk/ChunkGenerator.java b/src/main/java/net/minecraft/world/level/chunk/ChunkGenerator.java
index a4e2ee3efde40c902555f982ffa546c24bc31377..ec7343c7acb438781026b25390528889209fe97a 100644
--- a/src/main/java/net/minecraft/world/level/chunk/ChunkGenerator.java
+++ b/src/main/java/net/minecraft/world/level/chunk/ChunkGenerator.java
@@ -530,7 +530,7 @@ public abstract class ChunkGenerator {
             int j = list.size();
 
             try {
-                Registry<PlacedFeature> iregistry1 = generatoraccessseed.registryAccess().registryOrThrow(Registry.PLACED_FEATURE_REGISTRY);
+                Registry<PlacedFeature> iregistry1 = generatoraccessseed.registryAccess().registryOrThrow(Registry.PLACED_FEATURE_REGISTRY); // Paper - diff on change
                 int k = Math.max(GenerationStep.Decoration.values().length, j);
 
                 for (int l = 0; l < k; ++l) {
@@ -603,7 +603,15 @@ public abstract class ChunkGenerator {
                                 return (String) optional.orElseGet(placedfeature::toString);
                             };
 
-                            seededrandom.setFeatureSeed(i, l1, l);
+                            // Paper start - change populationSeed used in random
+                            long featurePopulationSeed = i;
+                            final net.minecraft.resources.ResourceLocation location = iregistry1.getKey(placedfeature);
+                            final long configFeatureSeed = generatoraccessseed.getMinecraftWorld().paperConfig().featureSeeds.features.getLong(location); // TODO this wont work
+                            if (configFeatureSeed != -1) {
+                                featurePopulationSeed = seededrandom.setDecorationSeed(configFeatureSeed, blockposition.getX(), blockposition.getZ()); // See seededrandom.setDecorationSeed from above
+                            }
+                            seededrandom.setFeatureSeed(featurePopulationSeed, l1, l);
+                            // Paper end
 
                             try {
                                 generatoraccessseed.setCurrentlyGenerating(supplier1);