mirror of https://github.com/PaperMC/Paper.git
30 lines
1.6 KiB
Diff
30 lines
1.6 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
|
|
From: David Slovikosky <davidslovikosky@gmail.com>
|
|
Date: Tue, 9 Jun 2020 00:10:03 -0700
|
|
Subject: [PATCH] Fix missing chunks due to integer overflow
|
|
|
|
This patch fixes a bug in the EndIslandDensityFunction class where the distance
|
|
from 0,0 squared overflows the maximum size of an integer. The overflow leads
|
|
to hard chunk borders around 370,000 blocks from 0,0. After this cutoff there
|
|
is a few hundred thousand block gap before end land resuming to generate at
|
|
530,000 blocks from spawn. This is due to the integer flipping back and forth.
|
|
|
|
The fix for the issue is quite simple, casting chunk coordinates to longs
|
|
allows the distance calculation to avoid overflow and work as intended.
|
|
|
|
This issue is being tracked in Mojira ticket MC-159283
|
|
|
|
diff --git a/src/main/java/net/minecraft/world/level/levelgen/DensityFunctions.java b/src/main/java/net/minecraft/world/level/levelgen/DensityFunctions.java
|
|
index 299116c5c4d25c78a2af00bb44c4f51ac04286e8..fac92f37c32e0398ebc05d9a0378446fcabaef1a 100644
|
|
--- a/src/main/java/net/minecraft/world/level/levelgen/DensityFunctions.java
|
|
+++ b/src/main/java/net/minecraft/world/level/levelgen/DensityFunctions.java
|
|
@@ -502,7 +502,7 @@ public final class DensityFunctions {
|
|
int j = z / 2;
|
|
int k = x % 2;
|
|
int l = z % 2;
|
|
- float f = 100.0F - Mth.sqrt((float)(x * x + z * z)) * 8.0F;
|
|
+ float f = 100.0F - Mth.sqrt((long) x * (long) x + (long) z * (long) z) * 8.0F; // Paper - cast ints to long to avoid integer overflow
|
|
f = Mth.clamp(f, -100.0F, 80.0F);
|
|
|
|
for(int m = -12; m <= 12; ++m) {
|