PaperMC/Spigot-Server-Patches/0104-Prevent-Waterflow-BlockFromToEvent-from-loading-chun.patch
Zach Brown 812618deba
Remove changes to lava/water cobblestone gen
Unintended side effects in recent versions, this patch has likely
outlived its usefulness.

Closes GH-452
2016-10-21 16:08:34 -05:00

52 lines
2.7 KiB
Diff

From ecb9dba3254e2296f732959131afccde0c823752 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Mon, 28 Mar 2016 22:03:09 -0400
Subject: [PATCH] Prevent Waterflow BlockFromToEvent from loading chunks
Many protection plugins would unintentionally trigger chunk loads
by calling .getToBlock() on an unloaded chunk, killing performance.
Simply skip the event call. as CraftBukkit blocks changing the block
of unloaded chunks anyways.
This keeps behavior consistent, vs inconsistent flowing based on plugin triggered loads.
diff --git a/src/main/java/net/minecraft/server/BlockFlowing.java b/src/main/java/net/minecraft/server/BlockFlowing.java
index 0336b9c..044ad71 100644
--- a/src/main/java/net/minecraft/server/BlockFlowing.java
+++ b/src/main/java/net/minecraft/server/BlockFlowing.java
@@ -105,6 +105,7 @@ public class BlockFlowing extends BlockFluids {
IBlockData iblockdata2 = world.getType(blockposition.down());
if (this.h(world, blockposition.down(), iblockdata2)) {
+ if (!canFlowTo(world, source, BlockFace.DOWN)) { return; } // Paper
// CraftBukkit start - Send "down" to the server
BlockFromToEvent event = new BlockFromToEvent(source, BlockFace.DOWN);
if (server != null) {
@@ -142,6 +143,7 @@ public class BlockFlowing extends BlockFluids {
EnumDirection enumdirection1 = (EnumDirection) iterator1.next();
// CraftBukkit start
+ if (!canFlowTo(world, source, org.bukkit.craftbukkit.block.CraftBlock.notchToBlockFace(enumdirection1))) { continue; } // Paper
BlockFromToEvent event = new BlockFromToEvent(source, org.bukkit.craftbukkit.block.CraftBlock.notchToBlockFace(enumdirection1));
if (server != null) {
server.getPluginManager().callEvent(event);
@@ -156,8 +158,14 @@ public class BlockFlowing extends BlockFluids {
}
+ // Paper start
+ private boolean canFlowTo(World world, org.bukkit.block.Block source, BlockFace face) {
+ return source.getWorld().isChunkLoaded((source.getX() + face.getModX()) >> 4, (source.getZ() + face.getModZ()) >> 4);
+ }
+ // Paper end
+
private void flow(World world, BlockPosition blockposition, IBlockData iblockdata, int i) {
- if (world.isLoaded(blockposition) && this.h(world, blockposition, iblockdata)) { // CraftBukkit - add isLoaded check
+ if (/*world.isLoaded(blockposition) &&*/ this.h(world, blockposition, iblockdata)) { // CraftBukkit - add isLoaded check // Paper - Already checked before we get here for isLoaded
if (iblockdata.getMaterial() != Material.AIR) {
if (this.material == Material.LAVA) {
this.fizz(world, blockposition);
--
2.9.3