PaperMC/patches/server/0098-Optional-TNT-doesn-t-move-in-water.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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Diff

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Zach Brown <zach.brown@destroystokyo.com>
Date: Sun, 22 May 2016 20:20:55 -0500
Subject: [PATCH] Optional TNT doesn't move in water
diff --git a/src/main/java/net/minecraft/server/level/ServerEntity.java b/src/main/java/net/minecraft/server/level/ServerEntity.java
index 8b3ca38f029b8918f02c51995e4359cbbf741c76..d6f34adbdf45bbef4a39e629dd7cb6d7fcb5db0f 100644
--- a/src/main/java/net/minecraft/server/level/ServerEntity.java
+++ b/src/main/java/net/minecraft/server/level/ServerEntity.java
@@ -65,7 +65,7 @@ public class ServerEntity {
private boolean wasRiding;
private boolean wasOnGround;
// CraftBukkit start
- private final Set<ServerPlayerConnection> trackedPlayers;
+ final Set<ServerPlayerConnection> trackedPlayers; // Paper - private -> package
public ServerEntity(ServerLevel worldserver, Entity entity, int i, boolean flag, Consumer<Packet<?>> consumer, Set<ServerPlayerConnection> trackedPlayers) {
this.trackedPlayers = trackedPlayers;
diff --git a/src/main/java/net/minecraft/world/entity/item/PrimedTnt.java b/src/main/java/net/minecraft/world/entity/item/PrimedTnt.java
index 10f8b5ff56e4c1d8300835e045abdce719a99343..8101f358975b35b5a2dafbade3d14a910e408fa2 100644
--- a/src/main/java/net/minecraft/world/entity/item/PrimedTnt.java
+++ b/src/main/java/net/minecraft/world/entity/item/PrimedTnt.java
@@ -97,6 +97,27 @@ public class PrimedTnt extends Entity {
}
}
+ // Paper start - Optional prevent TNT from moving in water
+ if (!this.isRemoved() && this.wasTouchingWater && this.level.paperConfig().fixes.preventTntFromMovingInWater) {
+ /*
+ * Author: Jedediah Smith <jedediah@silencegreys.com>
+ */
+ // Send position and velocity updates to nearby players on every tick while the TNT is in water.
+ // This does pretty well at keeping their clients in sync with the server.
+ net.minecraft.server.level.ChunkMap.TrackedEntity ete = ((net.minecraft.server.level.ServerLevel)this.level).getChunkSource().chunkMap.entityMap.get(this.getId());
+ if (ete != null) {
+ net.minecraft.network.protocol.game.ClientboundSetEntityMotionPacket velocityPacket = new net.minecraft.network.protocol.game.ClientboundSetEntityMotionPacket(this);
+ net.minecraft.network.protocol.game.ClientboundTeleportEntityPacket positionPacket = new net.minecraft.network.protocol.game.ClientboundTeleportEntityPacket(this);
+
+ ete.seenBy.stream()
+ .filter(viewer -> (viewer.getPlayer().getX() - this.getX()) * (viewer.getPlayer().getY() - this.getY()) * (viewer.getPlayer().getZ() - this.getZ()) < 16 * 16)
+ .forEach(viewer -> {
+ viewer.send(velocityPacket);
+ viewer.send(positionPacket);
+ });
+ }
+ }
+ // Paper end
}
private void explode() {
@@ -152,4 +173,11 @@ public class PrimedTnt extends Entity {
public Packet<?> getAddEntityPacket() {
return new ClientboundAddEntityPacket(this);
}
+
+ // Paper start - Optional prevent TNT from moving in water
+ @Override
+ public boolean isPushedByFluid() {
+ return !level.paperConfig().fixes.preventTntFromMovingInWater && super.isPushedByFluid();
+ }
+ // Paper end
}