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Paper/Spigot-Server-Patches/0454-Optimize-Collision-Chunk-lookup-and-avoid-loading-fa.patch
Aikar 57dd397155
Updated Upstream (Bukkit/CraftBukkit)
Upstream has released updates that appears to apply and compile correctly.
This update has not been tested by PaperMC and as with ANY update, please do your own testing

Bukkit Changes:
b999860d SPIGOT-2304: Add LootGenerateEvent

CraftBukkit Changes:
77fd87e4 SPIGOT-2304: Implement LootGenerateEvent
a1a705ee SPIGOT-5566: Doused campfires & fires should call EntityChangeBlockEvent
41712edd SPIGOT-5707: PersistentDataHolder not Persistent on API dropped Item
2020-05-01 18:03:57 -04:00

43 lines
2.2 KiB
Diff

From ef055b2d308e7f386a101f0aabd78afbb34cdaed Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Thu, 2 Apr 2020 02:37:57 -0400
Subject: [PATCH] Optimize Collision Chunk lookup and avoid loading far chunks
Try to use a faster chunk lookup for collision detection, and only
fall back to the original for nearby chunks.
The collision code takes an AABB and generates a cuboid of checks rather
than a cylinder, so at high velocity this can generate a lot of chunk checks.
diff --git a/src/main/java/net/minecraft/server/ICollisionAccess.java b/src/main/java/net/minecraft/server/ICollisionAccess.java
index f851ed11df..d154487294 100644
--- a/src/main/java/net/minecraft/server/ICollisionAccess.java
+++ b/src/main/java/net/minecraft/server/ICollisionAccess.java
@@ -83,15 +83,19 @@ public interface ICollisionAccess extends IBlockAccess {
}
while (cursorposition.a()) {
- int k1 = cursorposition.b();
- int l1 = cursorposition.c();
- int i2 = cursorposition.d();
+ int k1 = cursorposition.b();int x = k1; // Paper
+ int l1 = cursorposition.c();int y = l1; // Paper
+ int i2 = cursorposition.d();int z = i2; // Paper
int j2 = cursorposition.e();
if (j2 != 3) {
int k2 = k1 >> 4;
int l2 = i2 >> 4;
- IBlockAccess iblockaccess = ICollisionAccess.this.c(k2, l2);
+ // Paper start - ensure we don't load chunks
+ boolean far = entity != null && MCUtil.distance(entity.locX(), entity.locY(), entity.locZ(), x, y, z) > 32;
+ IBlockAccess iblockaccess = ICollisionAccess.this instanceof WorldServer ? ((WorldServer) ICollisionAccess.this).getChunkProvider().getChunkAtIfLoadedMainThread(k2, l2) : null;
+ if (!far && iblockaccess == null) iblockaccess = ICollisionAccess.this.c(k2, l2);
+ // Paper end
if (iblockaccess != null) {
blockposition_mutableblockposition.d(k1, l1, i2);
--
2.26.2