From f6968269b41a76f27898f9585d7150818c6d8d98 Mon Sep 17 00:00:00 2001
From: Julian Krings <juliankrings6@gmail.com>
Date: Sat, 6 Sep 2025 14:35:25 +0200
Subject: [PATCH] add toggle to offset noise types fixing seeds

---
 .../com/volmit/iris/core/IrisSettings.java    |  1 +
 .../iris/util/noise/NoiseGenerator.java       |  4 ++
 .../com/volmit/iris/util/noise/NoiseType.java |  4 +-
 .../iris/util/noise/OffsetNoiseGenerator.java | 48 +++++++++++++++++++
 4 files changed, 56 insertions(+), 1 deletion(-)
 create mode 100644 core/src/main/java/com/volmit/iris/util/noise/OffsetNoiseGenerator.java

diff --git a/core/src/main/java/com/volmit/iris/core/IrisSettings.java b/core/src/main/java/com/volmit/iris/core/IrisSettings.java
index dcab2aa18..65991a686 100644
--- a/core/src/main/java/com/volmit/iris/core/IrisSettings.java
+++ b/core/src/main/java/com/volmit/iris/core/IrisSettings.java
@@ -243,6 +243,7 @@ public class IrisSettings {
         public int maxBiomeChildDepth = 4;
         public boolean preventLeafDecay = true;
         public boolean useMulticore = false;
+        public boolean offsetNoiseTypes = false;
     }
 
     @Data
diff --git a/core/src/main/java/com/volmit/iris/util/noise/NoiseGenerator.java b/core/src/main/java/com/volmit/iris/util/noise/NoiseGenerator.java
index 6ad166239..4574e9eb1 100644
--- a/core/src/main/java/com/volmit/iris/util/noise/NoiseGenerator.java
+++ b/core/src/main/java/com/volmit/iris/util/noise/NoiseGenerator.java
@@ -39,4 +39,8 @@ public interface NoiseGenerator {
     default ProceduralStream<Double> stream() {
         return ProceduralStream.of(this::noise, this::noise, Interpolated.DOUBLE);
     }
+
+    default OffsetNoiseGenerator offset(long seed) {
+        return new OffsetNoiseGenerator(this, seed);
+    }
 }
diff --git a/core/src/main/java/com/volmit/iris/util/noise/NoiseType.java b/core/src/main/java/com/volmit/iris/util/noise/NoiseType.java
index b2d26b2c8..20f89ca8b 100644
--- a/core/src/main/java/com/volmit/iris/util/noise/NoiseType.java
+++ b/core/src/main/java/com/volmit/iris/util/noise/NoiseType.java
@@ -18,6 +18,7 @@
 
 package com.volmit.iris.util.noise;
 
+import com.volmit.iris.core.IrisSettings;
 import com.volmit.iris.util.interpolation.InterpolationMethod;
 
 public enum NoiseType {
@@ -77,6 +78,7 @@ public enum NoiseType {
     }
 
     public NoiseGenerator create(long seed) {
-        return f.create(seed);
+        if (IrisSettings.get().getGenerator().offsetNoiseTypes) return f.create(seed).offset(seed);
+        else return f.create(seed);
     }
 }
diff --git a/core/src/main/java/com/volmit/iris/util/noise/OffsetNoiseGenerator.java b/core/src/main/java/com/volmit/iris/util/noise/OffsetNoiseGenerator.java
new file mode 100644
index 000000000..97e3088c0
--- /dev/null
+++ b/core/src/main/java/com/volmit/iris/util/noise/OffsetNoiseGenerator.java
@@ -0,0 +1,48 @@
+package com.volmit.iris.util.noise;
+
+
+import com.volmit.iris.util.math.RNG;
+import org.jetbrains.annotations.NotNull;
+
+
+public class OffsetNoiseGenerator implements NoiseGenerator {
+    private final NoiseGenerator base;
+    private final double ox, oz;
+
+    public OffsetNoiseGenerator(NoiseGenerator base, long seed) {
+        this.base = base;
+        RNG rng = new RNG(seed);
+        ox = rng.nextInt(Short.MIN_VALUE, Short.MAX_VALUE);
+        oz = rng.nextInt(Short.MIN_VALUE, Short.MAX_VALUE);
+    }
+
+    @Override
+    public double noise(double x) {
+        return base.noise(x + ox);
+    }
+
+    @Override
+    public double noise(double x, double z) {
+        return base.noise(x + ox, z + oz);
+    }
+
+    @Override
+    public double noise(double x, double y, double z) {
+        return base.noise(x + ox, y, z + oz);
+    }
+
+    @Override
+    public boolean isNoScale() {
+        return base.isNoScale();
+    }
+
+    @Override
+    public boolean isStatic() {
+        return base.isStatic();
+    }
+
+    @NotNull
+    public NoiseGenerator getBase() {
+        return base;
+    }
+}
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