From 7ac07ac07ac07ac07ac07ac07ac07ac07ac07ac0 Mon Sep 17 00:00:00 2001 From: Aikar 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 7ac07ac07ac0..7ac07ac07ac0 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 7ac07ac07ac0..7ac07ac07ac0 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