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Paper/patches/server/0795-Expose-vanilla-BiomeProvider-from-WorldInfo.patch
Spottedleaf 01a13871de
Rewrite chunk system (#8177) 
Patch documentation to come

Issues with the old system that are fixed now:
- World generation does not scale with cpu cores effectively.
- Relies on the main thread for scheduling and maintaining chunk state, dropping chunk load/generate rates at lower tps.
- Unreliable prioritisation of chunk gen/load calls that block the main thread.
- Shutdown logic is utterly unreliable, as it has to wait for all chunks to unload - is it guaranteed that the chunk system is in a state on shutdown that it can reliably do this? Watchdog shutdown also typically failed due to thread checks, which is now resolved.
- Saving of data is not unified (i.e can save chunk data without saving entity data, poses problems for desync if shutdown is really abnormal.
- Entities are not loaded with chunks. This caused quite a bit of headache for Chunk#getEntities API, but now the new chunk system loads entities with chunks so that they are ready whenever the chunk loads in. Effectively brings the behavior back to 1.16 era, but still storing entities in their own separate regionfiles.

The above list is not complete. The patch documentation will complete it.

New chunk system hard relies on starlight and dataconverter, and most importantly the new concurrent utilities in ConcurrentUtil.

Some of the old async chunk i/o interface (i.e the old file io thread reroutes _some_ calls to the new file io thread) is kept for plugin compat reasons. It will be removed in the next major version of minecraft.

The old legacy chunk system patches have been moved to the removed folder in case we need them again.
2022-09-26 01:02:51 -07:00

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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Jason Penilla <11360596+jpenilla@users.noreply.github.com>
Date: Thu, 6 Jan 2022 15:59:06 -0800
Subject: [PATCH] Expose vanilla BiomeProvider from WorldInfo
diff --git a/src/main/java/net/minecraft/server/MinecraftServer.java b/src/main/java/net/minecraft/server/MinecraftServer.java
index 9011dbbe6302deb7318d31b9db3d2419a1871c07..2310b0314cc8a0f298eb82839dbf601901415dea 100644
--- a/src/main/java/net/minecraft/server/MinecraftServer.java
+++ b/src/main/java/net/minecraft/server/MinecraftServer.java
@@ -562,7 +562,7 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop<TickTa
}
// Paper end
- org.bukkit.generator.WorldInfo worldInfo = new org.bukkit.craftbukkit.generator.CraftWorldInfo(iworlddataserver, worldSession, org.bukkit.World.Environment.getEnvironment(dimension), worlddimension.typeHolder().value());
+ org.bukkit.generator.WorldInfo worldInfo = new org.bukkit.craftbukkit.generator.CraftWorldInfo(iworlddataserver, worldSession, org.bukkit.World.Environment.getEnvironment(dimension), worlddimension.typeHolder().value(), worlddimension.generator(), this.registryAccess()); // Paper
if (biomeProvider == null && gen != null) {
biomeProvider = gen.getDefaultBiomeProvider(worldInfo);
}
diff --git a/src/main/java/org/bukkit/craftbukkit/CraftServer.java b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
index bf747c7584733014aac771ba4ca039c588582f25..e69480421f4fbebcf2a2000e8fa91fc9a9d34201 100644
--- a/src/main/java/org/bukkit/craftbukkit/CraftServer.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
@@ -1212,7 +1212,7 @@ public final class CraftServer implements Server {
net.minecraft.core.Registry<LevelStem> iregistry = worlddata.worldGenSettings().dimensions();
LevelStem worlddimension = (LevelStem) iregistry.get(actualDimension);
- WorldInfo worldInfo = new CraftWorldInfo(worlddata, worldSession, creator.environment(), worlddimension.typeHolder().value());
+ WorldInfo worldInfo = new CraftWorldInfo(worlddata, worldSession, creator.environment(), worlddimension.typeHolder().value(), worlddimension.generator(), this.getHandle().getServer().registryAccess()); // Paper
if (biomeProvider == null && generator != null) {
biomeProvider = generator.getDefaultBiomeProvider(worldInfo);
}
diff --git a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
index 65c82c3ec11b29245f7d92e402f2cf2ab5b8dae4..36a8552f046f8f6bf8138bef4ff0c526425e57a4 100644
--- a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
@@ -200,6 +200,30 @@ public class CraftWorld extends CraftRegionAccessor implements World {
public int getPlayerCount() {
return world.players().size();
}
+
+ @Override
+ public BiomeProvider vanillaBiomeProvider() {
+ net.minecraft.server.level.ServerChunkCache serverCache = this.getHandle().chunkSource;
+
+ final net.minecraft.world.level.biome.BiomeSource biomeSource = serverCache.getGenerator().getBiomeSource();
+ final net.minecraft.world.level.biome.Climate.Sampler sampler = serverCache.randomState().sampler();
+ final net.minecraft.core.Registry<net.minecraft.world.level.biome.Biome> biomeRegistry = this.getHandle().registryAccess().registryOrThrow(net.minecraft.core.Registry.BIOME_REGISTRY);
+
+ final List<Biome> possibleBiomes = biomeSource.possibleBiomes().stream()
+ .map(biome -> CraftBlock.biomeBaseToBiome(biomeRegistry, biome))
+ .toList();
+ return new BiomeProvider() {
+ @Override
+ public Biome getBiome(final org.bukkit.generator.WorldInfo worldInfo, final int x, final int y, final int z) {
+ return CraftBlock.biomeBaseToBiome(biomeRegistry, biomeSource.getNoiseBiome(x >> 2, y >> 2, z >> 2, sampler));
+ }
+
+ @Override
+ public List<Biome> getBiomes(final org.bukkit.generator.WorldInfo worldInfo) {
+ return possibleBiomes;
+ }
+ };
+ }
// Paper end
private static final Random rand = new Random();
diff --git a/src/main/java/org/bukkit/craftbukkit/generator/CraftWorldInfo.java b/src/main/java/org/bukkit/craftbukkit/generator/CraftWorldInfo.java
index 3795dc9b12d62113146e803554283acd8d0e5db9..b9af0c68bfa877314de0d45741a54795b581d9b8 100644
--- a/src/main/java/org/bukkit/craftbukkit/generator/CraftWorldInfo.java
+++ b/src/main/java/org/bukkit/craftbukkit/generator/CraftWorldInfo.java
@@ -17,8 +17,14 @@ public class CraftWorldInfo implements WorldInfo {
private final long seed;
private final int minHeight;
private final int maxHeight;
+ // Paper start
+ private final net.minecraft.world.level.chunk.ChunkGenerator vanillaChunkGenerator;
+ private final net.minecraft.core.RegistryAccess.Frozen registryAccess;
- public CraftWorldInfo(ServerLevelData worldDataServer, LevelStorageSource.LevelStorageAccess session, World.Environment environment, DimensionType dimensionManager) {
+ public CraftWorldInfo(ServerLevelData worldDataServer, LevelStorageSource.LevelStorageAccess session, World.Environment environment, DimensionType dimensionManager, net.minecraft.world.level.chunk.ChunkGenerator chunkGenerator, net.minecraft.core.RegistryAccess.Frozen registryAccess) {
+ this.registryAccess = registryAccess;
+ this.vanillaChunkGenerator = chunkGenerator;
+ // Paper end
this.name = worldDataServer.getLevelName();
this.uuid = WorldUUID.getUUID(session.levelDirectory.path().toFile());
this.environment = environment;
@@ -27,15 +33,6 @@ public class CraftWorldInfo implements WorldInfo {
this.maxHeight = dimensionManager.minY() + dimensionManager.height();
}
- public CraftWorldInfo(String name, UUID uuid, World.Environment environment, long seed, int minHeight, int maxHeight) {
- this.name = name;
- this.uuid = uuid;
- this.environment = environment;
- this.seed = seed;
- this.minHeight = minHeight;
- this.maxHeight = maxHeight;
- }
-
@Override
public String getName() {
return this.name;
@@ -65,4 +62,35 @@ public class CraftWorldInfo implements WorldInfo {
public int getMaxHeight() {
return this.maxHeight;
}
+
+ // Paper start
+ @Override
+ public org.bukkit.generator.BiomeProvider vanillaBiomeProvider() {
+ final net.minecraft.world.level.levelgen.RandomState randomState;
+ if (vanillaChunkGenerator instanceof net.minecraft.world.level.levelgen.NoiseBasedChunkGenerator noiseBasedChunkGenerator) {
+ randomState = net.minecraft.world.level.levelgen.RandomState.create(noiseBasedChunkGenerator.generatorSettings().value(),
+ registryAccess.registryOrThrow(net.minecraft.core.Registry.NOISE_REGISTRY), getSeed());
+ } else {
+ randomState = net.minecraft.world.level.levelgen.RandomState.create(net.minecraft.world.level.levelgen.NoiseGeneratorSettings.dummy(),
+ registryAccess.registryOrThrow(net.minecraft.core.Registry.NOISE_REGISTRY), getSeed());
+ }
+
+ final net.minecraft.core.Registry<net.minecraft.world.level.biome.Biome> biomeRegistry = CraftWorldInfo.this.registryAccess.registryOrThrow(net.minecraft.core.Registry.BIOME_REGISTRY);
+ final java.util.List<org.bukkit.block.Biome> possibleBiomes = CraftWorldInfo.this.vanillaChunkGenerator.getBiomeSource().possibleBiomes().stream()
+ .map(biome -> org.bukkit.craftbukkit.block.CraftBlock.biomeBaseToBiome(biomeRegistry, biome))
+ .toList();
+ return new org.bukkit.generator.BiomeProvider() {
+ @Override
+ public org.bukkit.block.Biome getBiome(final WorldInfo worldInfo, final int x, final int y, final int z) {
+ return org.bukkit.craftbukkit.block.CraftBlock.biomeBaseToBiome(biomeRegistry,
+ CraftWorldInfo.this.vanillaChunkGenerator.getBiomeSource().getNoiseBiome(x >> 2, y >> 2, z >> 2, randomState.sampler()));
+ }
+
+ @Override
+ public java.util.List<org.bukkit.block.Biome> getBiomes(final org.bukkit.generator.WorldInfo worldInfo) {
+ return possibleBiomes;
+ }
+ };
+ }
+ // Paper end
}
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