testserver/Spigot-Server-Patches/0372-Optimize-Light-Recalcu...

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From 3b42f567b8c42ad2bd2020fc41c14861f81a6b89 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Fri, 28 Sep 2018 20:46:29 -0400
Subject: [PATCH] Optimize Light Recalculations
The server triggers light recalculations even if the new block
is the same as the old block. At this time, BlockData Properties
do not impact light calculations.
So the only way light should change, is if the block itself
changes from 1 block to another.
Also optimizes to not repeatedly look up the same chunk for
light lookups.
diff --git a/src/main/java/net/minecraft/server/Chunk.java b/src/main/java/net/minecraft/server/Chunk.java
index 340b756bb..cc0413000 100644
--- a/src/main/java/net/minecraft/server/Chunk.java
+++ b/src/main/java/net/minecraft/server/Chunk.java
@@ -347,7 +347,7 @@ public class Chunk implements IChunkAccess {
private void a(int i, int j, int k, int l) {
if (l > k && this.areNeighborsLoaded(1)) { // Paper
for (int i1 = k; i1 < l; ++i1) {
- this.world.c(EnumSkyBlock.SKY, new BlockPosition(i, i1, j));
+ this.world.updateBrightness(EnumSkyBlock.SKY, new BlockPosition(i, i1, j), this); // Paper
}
this.x = true;
@@ -558,7 +558,7 @@ public class Chunk implements IChunkAccess {
} else {
if (flag1) {
this.initLighting();
- } else {
+ } else if (block != block1) { // Paper - Optimize light recalculations
this.runOrQueueLightUpdate(() -> { // Paper - Queue light update
int i1 = iblockdata.b(this.world, blockposition);
int j1 = iblockdata1.b(this.world, blockposition);
diff --git a/src/main/java/net/minecraft/server/World.java b/src/main/java/net/minecraft/server/World.java
index f1495d30c..7e7b62b1d 100644
--- a/src/main/java/net/minecraft/server/World.java
+++ b/src/main/java/net/minecraft/server/World.java
@@ -589,8 +589,9 @@ public abstract class World implements IEntityAccess, GeneratorAccess, IIBlockAc
}
if (this.worldProvider.g()) {
- for (i1 = k; i1 <= l; ++i1) {
- this.c(EnumSkyBlock.SKY, new BlockPosition(i, i1, j));
+ Chunk chunk = getChunkIfLoaded(i >> 4, j >> 4); // Paper
+ for (i1 = k; chunk != null && i1 <= l; ++i1) { // Paper
+ this.updateBrightness(EnumSkyBlock.SKY, new BlockPosition(i, i1, j), chunk); // Paper
}
}
@@ -2294,6 +2295,11 @@ public abstract class World implements IEntityAccess, GeneratorAccess, IIBlockAc
public boolean c(EnumSkyBlock enumskyblock, BlockPosition blockposition) {
// CraftBukkit start - Use neighbor cache instead of looking up
Chunk chunk = this.getChunkIfLoaded(blockposition.getX() >> 4, blockposition.getZ() >> 4);
+ // Paper start - optimize light updates where chunk is known
+ return updateBrightness(enumskyblock, blockposition, chunk);
+ }
+ public boolean updateBrightness(EnumSkyBlock enumskyblock, BlockPosition blockposition, Chunk chunk) {
+ // Paper end
if (chunk == null || !chunk.areNeighborsLoaded(1) /*!this.areChunksLoaded(blockposition, 17, false)*/) {
// CraftBukkit end
return false;
--
2.19.1