From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Byteflux <byte@byteflux.net>
Date: Wed, 2 Mar 2016 02:17:54 -0600
Subject: [PATCH] Generator Settings


diff --git a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
--- a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
+++ b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
@@ -0,0 +0,0 @@ public class PaperWorldConfig {
     private void perPlayerMobSpawns() {
         perPlayerMobSpawns = getBoolean("per-player-mob-spawns", false);
     }
+
+    public boolean generateFlatBedrock;
+    private void generatorSettings() {
+        generateFlatBedrock = getBoolean("generator-settings.flat-bedrock", false);
+    }
 }
diff --git a/src/main/java/net/minecraft/world/level/chunk/ChunkAccess.java b/src/main/java/net/minecraft/world/level/chunk/ChunkAccess.java
index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
--- a/src/main/java/net/minecraft/world/level/chunk/ChunkAccess.java
+++ b/src/main/java/net/minecraft/world/level/chunk/ChunkAccess.java
@@ -0,0 +0,0 @@ import org.apache.logging.log4j.LogManager;
 
 public interface ChunkAccess extends BlockGetter, FeatureAccess {
 
+    // Paper start
+    default boolean generateFlatBedrock() {
+        if (this instanceof ProtoChunk) {
+            return ((ProtoChunk)this).world.paperConfig.generateFlatBedrock;
+        } else if (this instanceof LevelChunk) {
+            return ((LevelChunk)this).world.paperConfig.generateFlatBedrock;
+        } else {
+            return false;
+        }
+    }
+    // Paper end
+
     BlockState getType(final int x, final int y, final int z); // Paper
     @Nullable
     BlockState setBlockState(BlockPos pos, BlockState state, boolean moved);
diff --git a/src/main/java/net/minecraft/world/level/chunk/ProtoChunk.java b/src/main/java/net/minecraft/world/level/chunk/ProtoChunk.java
index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
--- a/src/main/java/net/minecraft/world/level/chunk/ProtoChunk.java
+++ b/src/main/java/net/minecraft/world/level/chunk/ProtoChunk.java
@@ -0,0 +0,0 @@ public class ProtoChunk implements ChunkAccess {
     private long inhabitedTime;
     private final Map<GenerationStep.Carving, BitSet> carvingMasks;
     private volatile boolean isLightCorrect;
-    private final Level world; // Paper - Anti-Xray - Add world
+    final Level world; // Paper - Anti-Xray - Add world // Paper - private -> default
 
     // Paper start - Anti-Xray - Add world
     @Deprecated public ProtoChunk(ChunkPos pos, UpgradeData upgradeData) { this(pos, upgradeData, null); } // Notice for updates: Please make sure this constructor isn't used anywhere
diff --git a/src/main/java/net/minecraft/world/level/levelgen/NoiseBasedChunkGenerator.java b/src/main/java/net/minecraft/world/level/levelgen/NoiseBasedChunkGenerator.java
index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
--- a/src/main/java/net/minecraft/world/level/levelgen/NoiseBasedChunkGenerator.java
+++ b/src/main/java/net/minecraft/world/level/levelgen/NoiseBasedChunkGenerator.java
@@ -0,0 +0,0 @@ public final class NoiseBasedChunkGenerator extends ChunkGenerator {
         int i = chunk.getPos().getMinBlockX();
         int j = chunk.getPos().getMinBlockZ();
         NoiseGeneratorSettings generatorsettingbase = (NoiseGeneratorSettings) this.settings.get();
-        int k = generatorsettingbase.getBedrockFloorPosition();
-        int l = this.height - 1 - generatorsettingbase.getBedrockRoofPosition();
+        int k = generatorsettingbase.getBedrockFloorPosition(); final int floorHeight = k; // Paper
+        int l = this.height - 1 - generatorsettingbase.getBedrockRoofPosition(); final int roofHeight = l; // Paper
         boolean flag = true;
         boolean flag1 = l + 4 >= 0 && l < this.height;
         boolean flag2 = k + 4 >= 0 && k < this.height;
@@ -0,0 +0,0 @@ public final class NoiseBasedChunkGenerator extends ChunkGenerator {
 
                 if (flag1) {
                     for (i1 = 0; i1 < 5; ++i1) {
-                        if (i1 <= random.nextInt(5)) {
+                        if (i1 <= (chunk.generateFlatBedrock() ? roofHeight : random.nextInt(5))) { // Paper - Configurable flat bedrock roof
                             chunk.setBlockState(blockposition_mutableblockposition.set(blockposition.getX(), l - i1, blockposition.getZ()), Blocks.BEDROCK.defaultBlockState(), false);
                         }
                     }
@@ -0,0 +0,0 @@ public final class NoiseBasedChunkGenerator extends ChunkGenerator {
 
                 if (flag2) {
                     for (i1 = 4; i1 >= 0; --i1) {
-                        if (i1 <= random.nextInt(5)) {
+                        if (i1 <= (chunk.generateFlatBedrock() ? floorHeight : random.nextInt(5))) { // Paper - Configurable flat bedrock floor
                             chunk.setBlockState(blockposition_mutableblockposition.set(blockposition.getX(), k + i1, blockposition.getZ()), Blocks.BEDROCK.defaultBlockState(), false);
                         }
                     }