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e792da723a
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: 30885166 Update to Minecraft 1.16.4 CraftBukkit Changes: 3af81c71 Update to Minecraft 1.16.4 Spigot Changes: f011ca24 Update to Minecraft 1.16.4 Co-authored-by: Mariell Hoversholm <proximyst@proximyst.com>
30 lines
1.6 KiB
Diff
30 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/server/WorldChunkManagerTheEnd.java b/src/main/java/net/minecraft/server/WorldChunkManagerTheEnd.java
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index 844ad0fbdc6e2f9aee1d25fe21dcdf53eb28d559..9c15cd303ccc2928be4e3e7080e74e8314d7e0f2 100644
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--- a/src/main/java/net/minecraft/server/WorldChunkManagerTheEnd.java
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+++ b/src/main/java/net/minecraft/server/WorldChunkManagerTheEnd.java
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@@ -70,7 +70,9 @@ public class WorldChunkManagerTheEnd extends WorldChunkManager {
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int l = j / 2;
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int i1 = i % 2;
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int j1 = j % 2;
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- float f = 100.0F - MathHelper.c((float) (i * i + j * j)) * 8.0F;
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+ // Paper start - cast ints to long to avoid integer overflow
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+ float f = 100.0F - MathHelper.sqrt((long) i * (long) i + (long) j * (long) j) * 8.0F;
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+ // Paper end
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f = MathHelper.a(f, -100.0F, 80.0F);
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