From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: William Blake Galbreath <blake.galbreath@gmail.com>
Date: Thu, 1 Jul 2021 19:25:05 -0500
Subject: [PATCH] Structure seed options


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 e4591c0b3c8547cc6f4e2a0891fc378ee4334d9e..b2c93ce627cf0a50b4b0a60d2d4206e6c6904e0a 100644
--- a/src/main/java/net/minecraft/world/level/chunk/ChunkGenerator.java
+++ b/src/main/java/net/minecraft/world/level/chunk/ChunkGenerator.java
@@ -87,7 +87,10 @@ public abstract class ChunkGenerator implements BiomeManager.NoiseBiomeSource {
         this.biomeSource = populationSource;
         this.runtimeBiomeSource = biomeSource;
         this.settings = structuresConfig;
-        this.strongholdSeed = worldSeed;
+        // Purpur start
+        int salt = org.purpurmc.purpur.PurpurConfig.seedStructureStronghold;
+        this.strongholdSeed = worldSeed + (salt != -1 ? salt : 0);
+        // Purpur end
     }
 
     private void generateStrongholds() {
diff --git a/src/main/java/net/minecraft/world/level/levelgen/feature/BuriedTreasureFeature.java b/src/main/java/net/minecraft/world/level/levelgen/feature/BuriedTreasureFeature.java
index c4ec2e41314da9501dc62baa024607b2782d2c73..54341db6faf66c8e84156ee3a310fd0d6561b632 100644
--- a/src/main/java/net/minecraft/world/level/levelgen/feature/BuriedTreasureFeature.java
+++ b/src/main/java/net/minecraft/world/level/levelgen/feature/BuriedTreasureFeature.java
@@ -21,7 +21,10 @@ public class BuriedTreasureFeature extends StructureFeature<ProbabilityFeatureCo
 
     private static boolean checkLocation(PieceGeneratorSupplier.Context<ProbabilityFeatureConfiguration> context) {
         WorldgenRandom worldgenRandom = new WorldgenRandom(new LegacyRandomSource(0L));
-        worldgenRandom.setLargeFeatureWithSalt(context.seed(), context.chunkPos().x, context.chunkPos().z, 10387320);
+        // Purpur start
+        int salt = org.purpurmc.purpur.PurpurConfig.seedStructureBuriedTreasure;
+        worldgenRandom.setLargeFeatureWithSalt(context.seed(), context.chunkPos().x, context.chunkPos().z, salt != -1 ? salt : RANDOM_SALT);
+        // Purpur end
         return worldgenRandom.nextFloat() < (context.config()).probability && context.validBiomeOnTop(Heightmap.Types.OCEAN_FLOOR_WG);
     }
 
diff --git a/src/main/java/net/minecraft/world/level/levelgen/feature/MineshaftFeature.java b/src/main/java/net/minecraft/world/level/levelgen/feature/MineshaftFeature.java
index 45f11284bf65081b3b2e8da85114efbe5efd5b42..354a923350cbfc76645136858e8e96285de139a1 100644
--- a/src/main/java/net/minecraft/world/level/levelgen/feature/MineshaftFeature.java
+++ b/src/main/java/net/minecraft/world/level/levelgen/feature/MineshaftFeature.java
@@ -27,6 +27,10 @@ public class MineshaftFeature extends StructureFeature<MineshaftConfiguration> {
 
     private static boolean checkLocation(PieceGeneratorSupplier.Context<MineshaftConfiguration> context) {
         WorldgenRandom worldgenRandom = new WorldgenRandom(new LegacyRandomSource(0L));
+        // Purpur start
+        int salt = org.purpurmc.purpur.PurpurConfig.seedStructureMineshaft;
+        if (salt != -1) worldgenRandom.setLargeFeatureWithSalt(context.seed(), context.chunkPos().x, context.chunkPos().z, salt); else
+        // Purpur end
         worldgenRandom.setLargeFeatureSeed(context.seed(), context.chunkPos().x, context.chunkPos().z);
         double d = (double)(context.config()).probability;
         return worldgenRandom.nextDouble() >= d ? false : context.validBiome().test(context.chunkGenerator().getNoiseBiome(QuartPos.fromBlock(context.chunkPos().getMiddleBlockX()), QuartPos.fromBlock(50), QuartPos.fromBlock(context.chunkPos().getMiddleBlockZ())));
diff --git a/src/main/java/org/purpurmc/purpur/PurpurConfig.java b/src/main/java/org/purpurmc/purpur/PurpurConfig.java
index bdad489cdcf21c951eba5fb295aaf1c1af563676..19caecd693a02171606d731572c81e6bfcd2b9ec 100644
--- a/src/main/java/org/purpurmc/purpur/PurpurConfig.java
+++ b/src/main/java/org/purpurmc/purpur/PurpurConfig.java
@@ -201,6 +201,17 @@ public class PurpurConfig {
         deathMessageOnlyBroadcastToAffectedPlayer = getBoolean("settings.broadcasts.death.only-broadcast-to-affected-player", deathMessageOnlyBroadcastToAffectedPlayer);
     }
 
+    public static int seedStructureBuriedTreasure = -1;
+    public static int seedStructureMineshaft = -1;
+    public static int seedStructureStronghold = -1;
+    private static void seedSettings() {
+        seedStructureBuriedTreasure = getInt("settings.seed.structure.buried_treasure", seedStructureBuriedTreasure);
+        seedStructureMineshaft = getInt("settings.seed.structure.mineshaft", seedStructureMineshaft);
+        seedStructureStronghold = getInt("settings.seed.structure.stronghold", seedStructureStronghold);
+        // hide these from timings report
+        if (!TimingsManager.hiddenConfigs.contains("settings.seed")) TimingsManager.hiddenConfigs.add("settings.seed");
+    }
+
     public static String serverModName = "Purpur";
     private static void serverModName() {
         serverModName = getString("settings.server-mod-name", serverModName);