add white noise to FastNoiseLite

common/src/main/java/com/dfsek/terra/api/math/noise/samplers/FastNoiseLite.java

@@ -777,6 +777,8 @@ public class FastNoiseLite implements NoiseSampler {
                 return singleValueCubic(seed, x, y);
             case Value:
                 return singleValue(seed, x, y);
+            case WhiteNoise:
+                return singleWhiteNoise(seed, x, y);
             default:
                 return 0;
         }
@@ -796,6 +798,8 @@ public class FastNoiseLite implements NoiseSampler {
                 return singleValueCubic(seed, x, y, z);
             case Value:
                 return singleValue(seed, x, y, z);
+            case WhiteNoise:
+                return singleWhiteNoise(seed, x, y, z);
             default:
                 return 0;
         }
@@ -1611,6 +1615,27 @@ public class FastNoiseLite implements NoiseSampler {
         return lerp(xf0, xf1, ys) * 1.4247691104677813f;
     }
 
+    private int doubleCast2Int(double f) {
+        int i = Float.floatToRawIntBits((float) f);
+
+        return i ^ (i >> 16);
+    }
+
+    private double singleWhiteNoise(int seed, double x, double y, double z) {
+        int xi = doubleCast2Int(x);
+        int yi = doubleCast2Int(y);
+        int zi = doubleCast2Int(z);
+
+        return valCoord(seed, xi, yi, zi);
+    }
+
+    private double singleWhiteNoise(int seed, double x, double y) {
+        int xi = doubleCast2Int(x);
+        int yi = doubleCast2Int(y);
+
+        return valCoord(seed, xi, yi);
+    }
+
     // Simplex/OpenSimplex2 Noise
     private double singlePerlin(int seed, double x, double y, double z) {
         int x0 = fastFloor(x);
@@ -2482,7 +2507,8 @@ public class FastNoiseLite implements NoiseSampler {
         Cellular,
         Perlin,
         ValueCubic,
-        Value
+        Value,
+        WhiteNoise
     }