PaperMC/patches/server/0832-Implement-getComputedBiome-API.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: Mon, 14 Mar 2022 22:46:05 -0700
Subject: [PATCH] Implement getComputedBiome API
diff --git a/src/main/java/org/bukkit/craftbukkit/CraftRegionAccessor.java b/src/main/java/org/bukkit/craftbukkit/CraftRegionAccessor.java
index 5628940cd3c3566c5db2beda506d4f20b6e3cbae..6445c2e4c97860e1c98f5263188d309cf55936f0 100644
--- a/src/main/java/org/bukkit/craftbukkit/CraftRegionAccessor.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftRegionAccessor.java
@@ -211,6 +211,13 @@ public abstract class CraftRegionAccessor implements RegionAccessor {
return CraftBlock.biomeBaseToBiome(this.getHandle().registryAccess().registryOrThrow(Registry.BIOME_REGISTRY), this.getHandle().getNoiseBiome(x >> 2, y >> 2, z >> 2));
}
+ // Paper start
+ @Override
+ public Biome getComputedBiome(int x, int y, int z) {
+ return CraftBlock.biomeBaseToBiome(this.getHandle().registryAccess().registryOrThrow(Registry.BIOME_REGISTRY), this.getHandle().getBiome(new BlockPos(x, y, z)));
+ }
+ // Paper end
+
@Override
public void setBiome(Location location, Biome biome) {
this.setBiome(location.getBlockX(), location.getBlockY(), location.getBlockZ(), biome);
diff --git a/src/main/java/org/bukkit/craftbukkit/block/CraftBlock.java b/src/main/java/org/bukkit/craftbukkit/block/CraftBlock.java
index 0030ac394d44acddcd2fc716277ae2b509a378af..22356c2380741dd811810420127e247e46b0b8e2 100644
--- a/src/main/java/org/bukkit/craftbukkit/block/CraftBlock.java
+++ b/src/main/java/org/bukkit/craftbukkit/block/CraftBlock.java
@@ -341,6 +341,13 @@ public class CraftBlock implements Block {
return this.getWorld().getBiome(this.getX(), this.getY(), this.getZ());
}
+ // Paper start
+ @Override
+ public Biome getComputedBiome() {
+ return this.getWorld().getComputedBiome(this.getX(), this.getY(), this.getZ());
+ }
+ // Paper end
+
@Override
public void setBiome(Biome bio) {
this.getWorld().setBiome(this.getX(), this.getY(), this.getZ(), bio);
diff --git a/src/main/java/org/bukkit/craftbukkit/generator/CraftLimitedRegion.java b/src/main/java/org/bukkit/craftbukkit/generator/CraftLimitedRegion.java
index 392701b0022e05d0fd03ee5836fd18f00502f028..b01904021bd4f485aaf03d1d7634b56f134d3099 100644
--- a/src/main/java/org/bukkit/craftbukkit/generator/CraftLimitedRegion.java
+++ b/src/main/java/org/bukkit/craftbukkit/generator/CraftLimitedRegion.java
@@ -166,6 +166,14 @@ public class CraftLimitedRegion extends CraftRegionAccessor implements LimitedRe
return super.getBiome(x, y, z);
}
+ // Paper start
+ @Override
+ public Biome getComputedBiome(int x, int y, int z) {
+ Preconditions.checkArgument(this.isInRegion(x, y, z), "Coordinates %s, %s, %s are not in the region", x, y, z);
+ return super.getComputedBiome(x, y, z);
+ }
+ // Paper end
+
@Override
public void setBiome(int x, int y, int z, Holder<net.minecraft.world.level.biome.Biome> biomeBase) {
Preconditions.checkArgument(this.isInRegion(x, y, z), "Coordinates %s, %s, %s are not in the region", x, y, z);