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PaperMC/patches/server/0646-Expose-vanilla-BiomeProvider-from-WorldInfo.patch
Bjarne Koll c5a10665b8
Remove wall-time / unused skip tick protection (#11412) 
Spigot still maintains some partial implementation of "tick skipping", a
practice in which the MinecraftServer.currentTick field is updated not
by an increment of one per actual tick, but instead set to
System.currentTimeMillis() / 50. This behaviour means that the tracked
tick may "skip" a tick value in case a previous tick took more than the
expected 50ms.

To compensate for this in important paths, spigot/craftbukkit
implements "wall-time". Instead of incrementing/decrementing ticks on
block entities/entities by one for each call to their tick() method,
they instead increment/decrement important values, like
an ItemEntity's age or pickupDelay, by the difference of
`currentTick - lastTick`, where `lastTick` is the value of
`currentTick` during the last tick() call.

These "fixes" however do not play nicely with minecraft's simulation
distance as entities/block entities implementing the above behaviour
would "catch up" their values when moving from a non-ticking chunk to a
ticking one as their `lastTick` value remains stuck on the last tick in
a ticking chunk and hence lead to a large "catch up" once ticked again.

Paper completely removes the "tick skipping" behaviour (See patch
"Further-improve-server-tick-loop"), making the above precautions
completely unnecessary, which also rids paper of the previous described
incompatibility with non-ticking chunks.
2024-09-19 16:36:07 +02:00

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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 56589fee8dd09783e01f2ae290ffacb5dff3f05f..718b653a118a1c64d07efab93192f10dfcbf414e 100644
--- a/src/main/java/net/minecraft/server/MinecraftServer.java
+++ b/src/main/java/net/minecraft/server/MinecraftServer.java
@@ -611,7 +611,7 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop<TickTa
List<CustomSpawner> list = ImmutableList.of(new PhantomSpawner(), new PatrolSpawner(), new CatSpawner(), new VillageSiege(), new WanderingTraderSpawner(iworlddataserver));
LevelStem worlddimension = (LevelStem) dimensions.get(dimensionKey);
- org.bukkit.generator.WorldInfo worldInfo = new org.bukkit.craftbukkit.generator.CraftWorldInfo(iworlddataserver, worldSession, org.bukkit.World.Environment.getEnvironment(dimension), worlddimension.type().value());
+ org.bukkit.generator.WorldInfo worldInfo = new org.bukkit.craftbukkit.generator.CraftWorldInfo(iworlddataserver, worldSession, org.bukkit.World.Environment.getEnvironment(dimension), worlddimension.type().value(), worlddimension.generator(), this.registryAccess()); // Paper - Expose vanilla BiomeProvider from WorldInfo
if (biomeProvider == null && gen != null) {
biomeProvider = gen.getDefaultBiomeProvider(worldInfo);
}
diff --git a/src/main/java/net/minecraft/server/level/ServerLevel.java b/src/main/java/net/minecraft/server/level/ServerLevel.java
index 3c947dc0aea06d66a00aeca51355ea41e8d98f88..60a77bd04489ee592ec61d3d739cb3062c1eefbb 100644
--- a/src/main/java/net/minecraft/server/level/ServerLevel.java
+++ b/src/main/java/net/minecraft/server/level/ServerLevel.java
@@ -369,7 +369,7 @@ public class ServerLevel extends Level implements WorldGenLevel {
this.serverLevelData.setWorld(this);
if (biomeProvider != null) {
- BiomeSource worldChunkManager = new CustomWorldChunkManager(this.getWorld(), biomeProvider, this.server.registryAccess().registryOrThrow(Registries.BIOME));
+ BiomeSource worldChunkManager = new CustomWorldChunkManager(this.getWorld(), biomeProvider, this.server.registryAccess().registryOrThrow(Registries.BIOME), chunkgenerator.getBiomeSource()); // Paper - add vanillaBiomeProvider
if (chunkgenerator instanceof NoiseBasedChunkGenerator cga) {
chunkgenerator = new NoiseBasedChunkGenerator(worldChunkManager, cga.settings);
} else if (chunkgenerator instanceof FlatLevelSource cpf) {
diff --git a/src/main/java/org/bukkit/craftbukkit/CraftServer.java b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
index b8117fac959a894c9821c82f624bc463174d3568..8364316aac2c13c99244912122c333feeeb5dd06 100644
--- a/src/main/java/org/bukkit/craftbukkit/CraftServer.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
@@ -1306,7 +1306,7 @@ public final class CraftServer implements Server {
List<CustomSpawner> list = ImmutableList.of(new PhantomSpawner(), new PatrolSpawner(), new CatSpawner(), new VillageSiege(), new WanderingTraderSpawner(worlddata));
LevelStem worlddimension = iregistry.get(actualDimension);
- WorldInfo worldInfo = new CraftWorldInfo(worlddata, worldSession, creator.environment(), worlddimension.type().value());
+ WorldInfo worldInfo = new CraftWorldInfo(worlddata, worldSession, creator.environment(), worlddimension.type().value(), worlddimension.generator(), this.getHandle().getServer().registryAccess()); // Paper - Expose vanilla BiomeProvider from WorldInfo
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 0c2734c1d06b6c5dff383f9c6139c0389f220a76..110a5d92d6154bc39c1916006a5cb74798092445 100644
--- a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
@@ -212,6 +212,39 @@ 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.chunk.ChunkGenerator gen = serverCache.getGenerator();
+ net.minecraft.world.level.biome.BiomeSource biomeSource;
+ if (gen instanceof org.bukkit.craftbukkit.generator.CustomChunkGenerator custom) {
+ biomeSource = custom.getDelegate().getBiomeSource();
+ } else {
+ biomeSource = gen.getBiomeSource();
+ }
+ if (biomeSource instanceof org.bukkit.craftbukkit.generator.CustomWorldChunkManager customBiomeSource) {
+ biomeSource = customBiomeSource.vanillaBiomeSource;
+ }
+ final net.minecraft.world.level.biome.BiomeSource finalBiomeSource = biomeSource;
+ final net.minecraft.world.level.biome.Climate.Sampler sampler = serverCache.randomState().sampler();
+
+ final List<Biome> possibleBiomes = finalBiomeSource.possibleBiomes().stream()
+ .map(CraftBiome::minecraftHolderToBukkit)
+ .toList();
+ return new BiomeProvider() {
+ @Override
+ public Biome getBiome(final org.bukkit.generator.WorldInfo worldInfo, final int x, final int y, final int z) {
+ return CraftBiome.minecraftHolderToBukkit(finalBiomeSource.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 5d655d6cd3e23e0287069f8bdf77601487e862fd..c81455a4ee9a3185f125ebf8cec325f4ed2e501d 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(PrimaryLevelData 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 +62,34 @@ 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.lookupOrThrow(net.minecraft.core.registries.Registries.NOISE), getSeed());
+ } else {
+ randomState = net.minecraft.world.level.levelgen.RandomState.create(net.minecraft.world.level.levelgen.NoiseGeneratorSettings.dummy(),
+ registryAccess.lookupOrThrow(net.minecraft.core.registries.Registries.NOISE), getSeed());
+ }
+
+ final java.util.List<org.bukkit.block.Biome> possibleBiomes = CraftWorldInfo.this.vanillaChunkGenerator.getBiomeSource().possibleBiomes().stream()
+ .map(biome -> org.bukkit.craftbukkit.block.CraftBiome.minecraftHolderToBukkit(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.CraftBiome.minecraftHolderToBukkit(
+ 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
}
diff --git a/src/main/java/org/bukkit/craftbukkit/generator/CustomWorldChunkManager.java b/src/main/java/org/bukkit/craftbukkit/generator/CustomWorldChunkManager.java
index 0063c4c17d05a77adf81164fb9307a29860cbe12..0bac128d6faff0063b03f595b82deea78d1ae161 100644
--- a/src/main/java/org/bukkit/craftbukkit/generator/CustomWorldChunkManager.java
+++ b/src/main/java/org/bukkit/craftbukkit/generator/CustomWorldChunkManager.java
@@ -31,7 +31,11 @@ public class CustomWorldChunkManager extends BiomeSource {
return biomeBases;
}
- public CustomWorldChunkManager(WorldInfo worldInfo, BiomeProvider biomeProvider, Registry<net.minecraft.world.level.biome.Biome> registry) {
+ // Paper start - add vanillaBiomeProvider
+ public final BiomeSource vanillaBiomeSource;
+ public CustomWorldChunkManager(WorldInfo worldInfo, BiomeProvider biomeProvider, Registry<net.minecraft.world.level.biome.Biome> registry, BiomeSource vanillaBiomeSource) {
+ this.vanillaBiomeSource = vanillaBiomeSource;
+ // Paper end - add vanillaBiomeProvider
this.worldInfo = worldInfo;
this.biomeProvider = biomeProvider;
this.registry = registry;
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