Random Access Simplex and Perlin Noise

README.md

@@ -17,15 +17,15 @@ Library of utilitities for procedural generation
 #### Using UnityPackageManager (for Unity 2019.3 or later)
 Open the package manager window (menu: Window > Package Manager)<br/>
 Select "Add package from git URL...", fill in the pop-up with the following link:<br/>
-https://github.com/coryleach/UnityProcgen.git#0.0.6<br/>
+https://github.com/coryleach/UnityProcgen.git#0.0.7<br/>
 
 #### Using UnityPackageManager (for Unity 2019.1 or later)
 
 Find the manifest.json file in the Packages folder of your project and edit it to look like this:
 ```js
 {
   "dependencies": {
-    "com.gameframe.procgen": "https://github.com/coryleach/UnityProcgen.git#0.0.6",
+    "com.gameframe.procgen": "https://github.com/coryleach/UnityProcgen.git#0.0.7",
     ...
   },
 }
@@ -57,8 +57,8 @@ The demo may require 2019.3
 
 
 ## Show your support
-
 Give a ⭐️ if this project helped you!
 
+
 ***
 _This README was generated with ❤️ by [Gameframe.Packages](https://github.com/coryleach/unitypackages)_

Runtime/ScriptableObjects/NoiseGenerator.cs

@@ -0,0 +1,100 @@
+using UnityEngine;
+
+namespace Gameframe.Procgen
+{
+    [CreateAssetMenu(menuName = "Gameframe/Procgen/NoiseGenerator/BasicNoise")]
+    public class NoiseGenerator : ScriptableObject
+    {
+        [SerializeField]
+        private uint seed;
+
+        [SerializeField]
+        private float frequency = 1.0f;
+
+        public uint Seed
+        {
+            get => seed;
+            set => seed = value;
+        }
+
+        public float Frequency
+        {
+            get => frequency;
+            set => frequency = value;
+        }
+
+        public float Value1D(float x)
+        {
+            return ValueNoise.Noise1D(x*frequency, seed);
+        }
+
+        public float Value2D(float x, float y)
+        {
+            return ValueNoise.Noise2D(x*frequency, y*frequency, seed);
+        }
+
+        public float Value3D(float x, float y, float z)
+        {
+            return ValueNoise.Noise3D(x*frequency, y*frequency, z*frequency, seed);
+        }
+
+        public float Value2D(Vector2 v)
+        {
+            return Value2D(v.x, v.y);
+        }
+
+        public float Value3D(Vector3 v)
+        {
+            return Value3D(v.x, v.y, v.z);
+        }
+
+    }
+
+    public class SimplexNoiseGenerator : ScriptableObject
+    {
+
+        /// <summary>
+        /// Map coordinate to position in a 1d simplex lattice
+        /// </summary>
+        /// <param name="x"></param>
+        /// <returns></returns>
+        private static float SkewCoordinate1d(float x)
+        {
+            const float f = 0.41421356237f; // (Mathf.Sqrt(1 + 1) - 1) / 1;
+            var skewed = 0f;
+            skewed = x + x * f;
+            return skewed;
+        }
+
+        /// <summary>
+        /// Map coordinate to position in a 2d simplex lattice
+        /// </summary>
+        /// <param name="v"></param>
+        /// <returns></returns>
+        private static Vector2 SkewCoordinate2d(Vector2 v)
+        {
+            const float f = 0.36602540378f; // (Mathf.Sqrt(2 + 1) - 1) / 2;
+            var skewed = Vector2.zero;
+            skewed.x = v.x + (v.x + v.y) * f;
+            skewed.y = v.y + (v.x + v.y) * f;
+            return skewed;
+        }
+
+        /// <summary>
+        /// Map coordinate to position in 3d simplex lattice
+        /// </summary>
+        /// <param name="v"></param>
+        /// <returns></returns>
+        private static Vector3 SkewCoordinate3d(Vector3 v)
+        {
+            const float f = 0.33333333333f; // (Mathf.Sqrt(3 + 1) - 1) / 3;
+            var skewed = Vector3.zero;
+            var sum = (v.x + v.y + v.z) * f;
+            skewed.x = v.x + sum;
+            skewed.y = v.y + sum;
+            skewed.z = v.z + sum;
+            return skewed;
+        }
+
+    }
+}

Runtime/ScriptableObjects/PerlinNoiseGenerator.cs

@@ -0,0 +1,52 @@
+using UnityEngine;
+
+namespace Gameframe.Procgen
+{
+    [CreateAssetMenu(menuName = "Gameframe/Procgen/NoiseGenerator/PerlinNoise")]
+    public class PerlinNoiseGenerator : ScriptableObject
+    {
+        [SerializeField]
+        private uint seed;
+
+        [SerializeField]
+        private float frequency = 1.0f;
+
+        public uint Seed
+        {
+            get => seed;
+            set => seed = value;
+        }
+
+        public float Frequency
+        {
+            get => frequency;
+            set => frequency = value;
+        }
+
+        public float Value1D(float x)
+        {
+            return ValueNoise.Noise1D(x*frequency, seed);
+        }
+
+        public float Value2D(float x, float y)
+        {
+            return ValueNoise.Noise2D(x*frequency, y*frequency, seed);
+        }
+
+        public float Value3D(float x, float y, float z)
+        {
+            return ValueNoise.Noise3D(x*frequency, y*frequency, z*frequency, seed);
+        }
+
+        public float Value2D(Vector2 v)
+        {
+            return Value2D(v.x, v.y);
+        }
+
+        public float Value3D(Vector3 v)
+        {
+            return Value3D(v.x, v.y, v.z);
+        }
+
+    }
+}

Runtime/Utility/FractalUtility.cs

@@ -0,0 +1,97 @@
+using System;
+
+namespace Gameframe.Procgen
+{
+    public static class FractalUtility
+    {
+        public static NoiseSample Sample1D(Func<float, uint, float, NoiseSample> action, float x, uint seed, float frequency, int octaves, float lacunarity = 2f, float persistence = 0.5f)
+        {
+            var sum = action(x, seed, frequency);
+            var amplitude = 1f;
+            var range = 1f;
+            for (var i = 1; i < octaves; i++)
+            {
+                frequency *= lacunarity;
+                amplitude *= persistence;
+                range += amplitude;
+                sum += action(x, seed, frequency) * amplitude;
+            }
+            return sum * (1 / range);
+        }
+
+        public static float Float1D(Func<float, uint, float, float> action, float x, uint seed, float frequency, int octaves, float lacunarity = 2f, float persistence = 0.5f)
+        {
+            var sum = action(x, seed, frequency);
+            var amplitude = 1f;
+            var range = 1f;
+            for (var i = 1; i < octaves; i++)
+            {
+                frequency *= lacunarity;
+                amplitude *= persistence;
+                range += amplitude;
+                sum += action(x, seed, frequency) * amplitude;
+            }
+            return sum * (1 / range);
+        }
+
+        public static NoiseSample Sample2D(Func<float, float, uint, float, NoiseSample> action, float x, float y, uint seed, float frequency, int octaves, float lacunarity = 2f, float persistence = 0.5f)
+        {
+            var sum = action(x, y, seed, frequency);
+            var amplitude = 1f;
+            var range = 1f;
+            for (var i = 1; i < octaves; i++)
+            {
+                frequency *= lacunarity;
+                amplitude *= persistence;
+                range += amplitude;
+                sum += action(x, y, seed, frequency) * amplitude;
+            }
+            return sum * (1 / range);
+        }
+
+        public static float Float2D(Func<float, float, uint, float, float> action, float x, float y, uint seed, float frequency, int octaves, float lacunarity = 2f, float persistence = 0.5f)
+        {
+            var sum = action(x, y, seed, frequency);
+            var amplitude = 1f;
+            var range = 1f;
+            for (var i = 1; i < octaves; i++)
+            {
+                frequency *= lacunarity;
+                amplitude *= persistence;
+                range += amplitude;
+                sum += action(x, y, seed, frequency) * amplitude;
+            }
+            return sum * (1 / range);
+        }
+
+        public static NoiseSample Sample3D(Func<float, float, float, uint, float, NoiseSample> action, float x, float y, float z, uint seed, float frequency, int octaves, float lacunarity = 2f, float persistence = 0.5f)
+        {
+            var sum = action(x, y, z, seed, frequency);
+            var amplitude = 1f;
+            var range = 1f;
+            for (var i = 1; i < octaves; i++)
+            {
+                frequency *= lacunarity;
+                amplitude *= persistence;
+                range += amplitude;
+                sum += action(x, y, z, seed, frequency) * amplitude;
+            }
+            return sum * (1 / range);
+        }
+
+        public static float Float3D(Func<float, float, float, uint, float, float> action, float x, float y, float z, uint seed, float frequency, int octaves, float lacunarity = 2f, float persistence = 0.5f)
+        {
+            var sum = action(x, y, z, seed, frequency);
+            var amplitude = 1f;
+            var range = 1f;
+            for (var i = 1; i < octaves; i++)
+            {
+                frequency *= lacunarity;
+                amplitude *= persistence;
+                range += amplitude;
+                sum += action(x, y, z, seed, frequency) * amplitude;
+            }
+            return sum * (1 / range);
+        }
+    }
+}

Runtime/Utility/IRandomAccessRandomNumberGenerator.cs

@@ -0,0 +1,10 @@
+namespace Gameframe.Procgen
+{
+    /// <summary>
+    /// Random number generator that provides random access to any position in its random number sequence
+    /// </summary>
+    public interface IRandomAccessRandomNumberGenerator : IRandomNumberGenerator
+    {
+        int Position { get; set; }
+    }
+}

Runtime/Utility/IRandomNumberGenerator.cs

@@ -0,0 +1,23 @@
+using UnityEngine;
+
+namespace Gameframe.Procgen
+{
+    /// <summary>
+    /// Random number generator that provides lots of different convenience methods relevant for game development
+    /// </summary>
+    public interface IRandomNumberGenerator
+    {
+        uint Seed { get; }
+        uint NextUint();
+        ushort NextUshort();
+        byte NextByte();
+        int NextInt();
+        short NextShort();
+        float NextFloatZeroToOne();
+        float NextFloatNegOneToOne();
+        float NextFloatRange(float min, float max);
+        bool RollChance(float probabilityOfReturningTrue);
+        Vector2 NextDirection2D();
+        Vector3 NextDirection3D();
+    }
+}