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01a13871de
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.
99 lines
5.6 KiB
Diff
99 lines
5.6 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Nassim Jahnke <nassim@njahnke.dev>
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Date: Mon, 31 Jan 2022 11:21:50 +0100
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Subject: [PATCH] Implement regenerateChunk
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Co-authored-by: Jason Penilla <11360596+jpenilla@users.noreply.github.com>
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diff --git a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
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index 36a8552f046f8f6bf8138bef4ff0c526425e57a4..7757e5b1aec0b1f0cba79aa4618a7fe1d210b72c 100644
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--- a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
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+++ b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
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@@ -139,6 +139,7 @@ import org.bukkit.util.Vector;
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public class CraftWorld extends CraftRegionAccessor implements World {
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public static final int CUSTOM_DIMENSION_OFFSET = 10;
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private static final CraftPersistentDataTypeRegistry DATA_TYPE_REGISTRY = new CraftPersistentDataTypeRegistry();
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+ private static final ChunkStatus[] REGEN_CHUNK_STATUSES = {ChunkStatus.BIOMES, ChunkStatus.NOISE, ChunkStatus.SURFACE, ChunkStatus.CARVERS, ChunkStatus.LIQUID_CARVERS, ChunkStatus.FEATURES}; // Paper - implement regenerate chunk method
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private final ServerLevel world;
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private WorldBorder worldBorder;
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@@ -419,27 +420,62 @@ public class CraftWorld extends CraftRegionAccessor implements World {
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@Override
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public boolean regenerateChunk(int x, int z) {
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org.spigotmc.AsyncCatcher.catchOp("chunk regenerate"); // Spigot
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- throw new UnsupportedOperationException("Not supported in this Minecraft version! Unless you can fix it, this is not a bug :)");
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- /*
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- if (!unloadChunk0(x, z, false)) {
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- return false;
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- }
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-
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- final long chunkKey = ChunkCoordIntPair.pair(x, z);
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- world.getChunkProvider().unloadQueue.remove(chunkKey);
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+ // Paper start - implement regenerateChunk method
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+ final ServerLevel serverLevel = this.world;
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+ final net.minecraft.server.level.ServerChunkCache serverChunkCache = serverLevel.getChunkSource();
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+ final ChunkPos chunkPos = new ChunkPos(x, z);
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+ final net.minecraft.world.level.chunk.LevelChunk levelChunk = serverChunkCache.getChunk(chunkPos.x, chunkPos.z, true);
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+ for (final BlockPos blockPos : BlockPos.betweenClosed(chunkPos.getMinBlockX(), serverLevel.getMinBuildHeight(), chunkPos.getMinBlockZ(), chunkPos.getMaxBlockX(), serverLevel.getMaxBuildHeight() - 1, chunkPos.getMaxBlockZ())) {
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+ levelChunk.removeBlockEntity(blockPos);
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+ serverLevel.setBlock(blockPos, net.minecraft.world.level.block.Blocks.AIR.defaultBlockState(), 16);
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+ }
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+
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+ for (final ChunkStatus chunkStatus : REGEN_CHUNK_STATUSES) {
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+ final List<ChunkAccess> list = new ArrayList<>();
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+ final int range = Math.max(1, chunkStatus.getRange());
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+ for (int chunkX = chunkPos.z - range; chunkX <= chunkPos.z + range; chunkX++) {
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+ for (int chunkZ = chunkPos.x - range; chunkZ <= chunkPos.x + range; chunkZ++) {
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+ ChunkAccess chunkAccess = serverChunkCache.getChunk(chunkZ, chunkX, chunkStatus.getParent(), true);
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+ if (chunkAccess instanceof ImposterProtoChunk accessProtoChunk) {
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+ chunkAccess = new ImposterProtoChunk(accessProtoChunk.getWrapped(), true);
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+ } else if (chunkAccess instanceof net.minecraft.world.level.chunk.LevelChunk accessLevelChunk) {
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+ chunkAccess = new ImposterProtoChunk(accessLevelChunk, true);
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+ }
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+ list.add(chunkAccess);
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+ }
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+ }
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- net.minecraft.server.Chunk chunk = world.getChunkProvider().generateChunk(x, z);
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- PlayerChunk playerChunk = world.getPlayerChunkMap().getChunk(x, z);
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- if (playerChunk != null) {
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- playerChunk.chunk = chunk;
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+ final java.util.concurrent.CompletableFuture<com.mojang.datafixers.util.Either<ChunkAccess, ChunkHolder.ChunkLoadingFailure>> future = chunkStatus.generate(
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+ Runnable::run,
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+ serverLevel,
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+ serverChunkCache.getGenerator(),
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+ serverLevel.getStructureManager(),
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+ serverChunkCache.getLightEngine(),
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+ chunk -> {
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+ throw new UnsupportedOperationException("Not creating full chunks here");
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+ },
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+ list,
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+ true
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+ );
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+ serverChunkCache.mainThreadProcessor.managedBlock(future::isDone);
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+ if (chunkStatus == ChunkStatus.NOISE) {
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+ future.join().left().ifPresent(chunk -> net.minecraft.world.level.levelgen.Heightmap.primeHeightmaps(chunk, ChunkStatus.POST_FEATURES));
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+ }
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}
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- if (chunk != null) {
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- refreshChunk(x, z);
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+ for (final BlockPos blockPos : BlockPos.betweenClosed(chunkPos.getMinBlockX(), serverLevel.getMinBuildHeight(), chunkPos.getMinBlockZ(), chunkPos.getMaxBlockX(), serverLevel.getMaxBuildHeight() - 1, chunkPos.getMaxBlockZ())) {
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+ serverChunkCache.blockChanged(blockPos);
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}
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- return chunk != null;
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- */
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+ final Set<ChunkPos> chunksToRelight = new HashSet<>(9);
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+ for (int chunkX = chunkPos.x - 1; chunkX <= chunkPos.x + 1 ; chunkX++) {
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+ for (int chunkZ = chunkPos.z - 1; chunkZ <= chunkPos.z + 1 ; chunkZ++) {
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+ chunksToRelight.add(new ChunkPos(chunkX, chunkZ));
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+ }
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+ }
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+ serverChunkCache.getLightEngine().relight(chunksToRelight, pos -> {}, relit -> {});
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+ return true;
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+ // Paper end
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}
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@Override
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