Paper/patches/server/0585-Add-worldborder-events.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: Jake Potrebic <jake.m.potrebic@gmail.com>
Date: Mon, 4 Jan 2021 22:40:34 -0800
Subject: [PATCH] Add worldborder events
diff --git a/src/main/java/net/minecraft/world/level/border/WorldBorder.java b/src/main/java/net/minecraft/world/level/border/WorldBorder.java
index 2442c287a7f26cfee10a19e9015558cdebdcf3ac..7a12a4da4864306ec6589ca81368e84718825047 100644
--- a/src/main/java/net/minecraft/world/level/border/WorldBorder.java
+++ b/src/main/java/net/minecraft/world/level/border/WorldBorder.java
@@ -123,6 +123,14 @@ public class WorldBorder {
}
public void setCenter(double x, double z) {
+ // Paper start
+ if (this.world != null) {
+ io.papermc.paper.event.world.border.WorldBorderCenterChangeEvent event = new io.papermc.paper.event.world.border.WorldBorderCenterChangeEvent(world.getWorld(), world.getWorld().getWorldBorder(), new org.bukkit.Location(world.getWorld(), this.getCenterX(), 0, this.getCenterZ()), new org.bukkit.Location(world.getWorld(), x, 0, z));
+ if (!event.callEvent()) return;
+ x = event.getNewCenter().getX();
+ z = event.getNewCenter().getZ();
+ }
+ // Paper end
this.centerX = x;
this.centerZ = z;
this.extent.onCenterChange();
@@ -149,6 +157,17 @@ public class WorldBorder {
}
public void setSize(double size) {
+ // Paper start
+ if (this.world != null) {
+ io.papermc.paper.event.world.border.WorldBorderBoundsChangeEvent event = new io.papermc.paper.event.world.border.WorldBorderBoundsChangeEvent(world.getWorld(), world.getWorld().getWorldBorder(), io.papermc.paper.event.world.border.WorldBorderBoundsChangeEvent.Type.INSTANT_MOVE, getSize(), size, 0);
+ if (!event.callEvent()) return;
+ if (event.getType() == io.papermc.paper.event.world.border.WorldBorderBoundsChangeEvent.Type.STARTED_MOVE && event.getDuration() > 0) { // If changed to a timed transition
+ lerpSizeBetween(event.getOldSize(), event.getNewSize(), event.getDuration());
+ return;
+ }
+ size = event.getNewSize();
+ }
+ // Paper end
this.extent = new WorldBorder.StaticBorderExtent(size);
Iterator iterator = this.getListeners().iterator();
@@ -161,6 +180,20 @@ public class WorldBorder {
}
public void lerpSizeBetween(double fromSize, double toSize, long time) {
+ // Paper start
+ if (this.world != null) {
+ io.papermc.paper.event.world.border.WorldBorderBoundsChangeEvent.Type type;
+ if (fromSize == toSize) { // new size = old size
+ type = io.papermc.paper.event.world.border.WorldBorderBoundsChangeEvent.Type.INSTANT_MOVE; // Use INSTANT_MOVE because below it creates a Static border if they are equal.
+ } else {
+ type = io.papermc.paper.event.world.border.WorldBorderBoundsChangeEvent.Type.STARTED_MOVE;
+ }
+ io.papermc.paper.event.world.border.WorldBorderBoundsChangeEvent event = new io.papermc.paper.event.world.border.WorldBorderBoundsChangeEvent(world.getWorld(), world.getWorld().getWorldBorder(), type, fromSize, toSize, time);
+ if (!event.callEvent()) return;
+ toSize = event.getNewSize();
+ time = event.getDuration();
+ }
+ // Paper end
this.extent = (WorldBorder.BorderExtent) (fromSize == toSize ? new WorldBorder.StaticBorderExtent(toSize) : new WorldBorder.MovingBorderExtent(fromSize, toSize, time));
Iterator iterator = this.getListeners().iterator();
@@ -472,6 +505,7 @@ public class WorldBorder {
@Override
public WorldBorder.BorderExtent update() {
+ if (world != null && this.getLerpRemainingTime() <= 0L) new io.papermc.paper.event.world.border.WorldBorderBoundsChangeFinishEvent(world.getWorld(), world.getWorld().getWorldBorder(), this.from, this.to, this.lerpDuration).callEvent(); // Paper
return (WorldBorder.BorderExtent) (this.getLerpRemainingTime() <= 0L ? WorldBorder.this.new StaticBorderExtent(this.to) : this);
}