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Paper/patches/unapplied/server/0798-Always-parse-protochunk-light-sources-unless-it-is-m.patch
2021-11-30 19:26:33 +01:00

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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Spottedleaf <Spottedleaf@users.noreply.github.com>
Date: Mon, 23 Aug 2021 04:50:05 -0700
Subject: [PATCH] Always parse protochunk light sources unless it is marked as
non-lit
Chunks not marked as lit will always go through the light engine,
so they should always have their block sources parsed.
diff --git a/src/main/java/net/minecraft/world/level/chunk/storage/ChunkSerializer.java b/src/main/java/net/minecraft/world/level/chunk/storage/ChunkSerializer.java
index ad4081efec9c7eaf315ddb660f813f6ef3cfbb5b..7921ee2786d0d6a60d43786b20efc03a0f9178e3 100644
--- a/src/main/java/net/minecraft/world/level/chunk/storage/ChunkSerializer.java
+++ b/src/main/java/net/minecraft/world/level/chunk/storage/ChunkSerializer.java
@@ -267,16 +267,33 @@ public class ChunkSerializer {
protochunk.setLightEngine(lightengine);
}
- if (!flag && protochunk.getStatus().isOrAfter(ChunkStatus.LIGHT)) {
- Iterator iterator = BlockPos.betweenClosed(pos.getMinBlockX(), world.getMinBuildHeight(), pos.getMinBlockZ(), pos.getMaxBlockX(), world.getMaxBuildHeight() - 1, pos.getMaxBlockZ()).iterator();
+ if (!flag) { // Paper - fix incorrect parsing of blocks that emit light - it should always parse it, unless the chunk is marked as lit
+ // Paper start - let's make sure the implementation isn't as slow as possible
+ int offX = pos.x << 4;
+ int offZ = pos.z << 4;
+
+ int minChunkSection = io.papermc.paper.util.WorldUtil.getMinSection(world);
+ int maxChunkSection = io.papermc.paper.util.WorldUtil.getMaxSection(world);
+
+ LevelChunkSection[] sections = achunksection;
+ for (int sectionY = minChunkSection; sectionY <= maxChunkSection; ++sectionY) {
+ LevelChunkSection section = sections[sectionY - minChunkSection];
+ if (section == null || section.isEmpty()) {
+ // no sources in empty sections
+ continue;
+ }
+ int offY = sectionY << 4;
- while (iterator.hasNext()) {
- BlockPos blockposition = (BlockPos) iterator.next();
+ for (int index = 0; index < (16 * 16 * 16); ++index) {
+ if (section.states.get(index).getLightEmission() <= 0) {
+ continue;
+ }
- if (((ChunkAccess) object).getBlockState(blockposition).getLightEmission() != 0) {
- protochunk.addLight(blockposition);
+ // index = x | (z << 4) | (y << 8)
+ protochunk.addLight(new BlockPos(offX | (index & 15), offY | (index >>> 8), offZ | ((index >>> 4) & 15)));
}
}
+ // Paper end
}
}