From fbe1c76e26bc21f008689033bb11e609bcac3bd3 Mon Sep 17 00:00:00 2001
From: Astrash <astrash@atr.sh>
Date: Wed, 9 Oct 2024 21:50:08 +1100
Subject: [PATCH] Forgot to include 4th derivative array index for 3D FBM

---
 .../noise/samplers/noise/fractal/BrownianMotionSampler.java    | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/common/addons/config-noise-function/src/main/java/com/dfsek/terra/addons/noise/samplers/noise/fractal/BrownianMotionSampler.java b/common/addons/config-noise-function/src/main/java/com/dfsek/terra/addons/noise/samplers/noise/fractal/BrownianMotionSampler.java
index 08272db24..524545514 100644
--- a/common/addons/config-noise-function/src/main/java/com/dfsek/terra/addons/noise/samplers/noise/fractal/BrownianMotionSampler.java
+++ b/common/addons/config-noise-function/src/main/java/com/dfsek/terra/addons/noise/samplers/noise/fractal/BrownianMotionSampler.java
@@ -87,7 +87,7 @@ public class BrownianMotionSampler extends FractalNoiseFunction {
 
     @Override
     public double[] getNoiseDerivativeRaw(long seed, double x, double y, double z) {
-        double[] sum = {0, 0, 0};
+        double[] sum = {0, 0, 0, 0};
         double amp = fractalBounding;
 
         for(int i = 0; i < octaves; i++) {
@@ -97,6 +97,7 @@ public class BrownianMotionSampler extends FractalNoiseFunction {
             // See comment in 2D version
             sum[1] += noise[1] * amp;
             sum[2] += noise[2] * amp;
+            sum[3] += noise[3] * amp;
 
             amp *= MathUtil.lerp(weightedStrength, 1.0, (noise[0] + 1) * 0.5);