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27 lines
1.6 KiB
Diff
27 lines
1.6 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: David Slovikosky <davidslovikosky@gmail.com>
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Date: Tue, 9 Jun 2020 00:10:03 -0700
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Subject: [PATCH] Fix missing chunks due to integer overflow
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This patch fixes a bug in the WorldChunkManagerTheEnd class where the distance
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from 0,0 squared overflows the maximum size of an integer. The overflow leads
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to hard chunk borders around 370,000 blocks from 0,0. After this cutoff there
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is a few hundred thousand block gap before end land resuming to generate at
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530,000 blocks from spawn. This is due to the integer flipping back and forth.
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The fix for the issue is quite simple, casting chunk coordinates to longs
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allows the distance calculation to avoid overflow and work as intended.
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diff --git a/src/main/java/net/minecraft/world/level/biome/TheEndBiomeSource.java b/src/main/java/net/minecraft/world/level/biome/TheEndBiomeSource.java
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index bbb43461ad899aae2212c32a9e839c766b3b8e37..3f9127f93c9720c89b578d36a1bcdb89fc01222a 100644
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--- a/src/main/java/net/minecraft/world/level/biome/TheEndBiomeSource.java
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+++ b/src/main/java/net/minecraft/world/level/biome/TheEndBiomeSource.java
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@@ -84,7 +84,7 @@ public class TheEndBiomeSource extends BiomeSource {
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int l = j / 2;
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int m = i % 2;
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int n = j % 2;
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- float f = 100.0F - Mth.sqrt((float)(i * i + j * j)) * 8.0F;
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+ float f = 100.0F - Mth.sqrt((long) i * (long) i + (long) j * (long) j) * 8.0F; // Paper - cast ints to long to avoid integer overflow
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f = Mth.clamp(f, -100.0F, 80.0F);
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for(int o = -12; o <= 12; ++o) {
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