Added partial port of fastnoise-java

2018-12-05 16:07:28 +01:00
parent 0272c68e0f
commit 362c7a5889
13 changed files with 733 additions and 0 deletions
--- a/orx-noise/src/main/kotlin/Fractal.kt
+++ b/orx-noise/src/main/kotlin/Fractal.kt
@@ -0,0 +1,105 @@
+package org.openrndr.extra.noise
+
+inline fun fbm(seed: Int, x: Double, y: Double, z: Double, crossinline noise: (Int, Double, Double, Double) -> Double,
+               octaves: Int = 8, lacunarity: Double = 0.5, gain: Double = 0.5): Double {
+    var sum = noise(seed, x, y, z)
+    var amp = 1.0
+
+    var x = x
+    var y = y
+    var z = z
+    for (i in 1 until octaves) {
+        x *= lacunarity
+        y *= lacunarity
+        z *= lacunarity
+        amp *= gain
+        sum += noise(seed + i, x, y, z) * amp
+    }
+    return sum
+}
+
+
+inline fun fbm(seed: Int, x: Double, y: Double, crossinline noise: (Int, Double, Double) -> Double,
+               octaves: Int = 8, lacunarity: Double = 0.5, gain: Double = 0.5): Double {
+    var sum = noise(seed, x, y)
+    var amp = 1.0
+
+    var x = x
+    var y = y
+    for (i in 1 until octaves) {
+        x *= lacunarity
+        y *= lacunarity
+        amp *= gain
+        sum += noise(seed + i, x, y) * amp
+    }
+    return sum
+}
+
+inline fun billow(seed: Int, x: Double, y: Double, z: Double, crossinline noise: (Int, Double, Double, Double) -> Double,
+                  octaves: Int = 8, lacunarity: Double = 0.5, gain: Double = 0.5) : Double {
+    var sum = Math.abs(noise(seed, x, y, z) * 2.0 - 1.0)
+    var amp = 1.0
+
+    var x = x
+    var y = y
+    var z = z
+    for (i in 1 until octaves) {
+        x *= lacunarity
+        y *= lacunarity
+        z *= lacunarity
+        amp *= gain
+        sum += Math.abs(noise(seed + i, x, y, z) * 2.0 - 1.0) * amp
+    }
+    return sum
+}
+
+inline fun billow(seed: Int, x: Double, y: Double, crossinline noise: (Int, Double, Double) -> Double,
+                  octaves: Int = 8, lacunarity: Double = 0.5, gain: Double = 0.5) : Double {
+    var sum = Math.abs(noise(seed, x, y) * 2.0 - 1.0)
+    var amp = 1.0
+
+    var x = x
+    var y = y
+    for (i in 1 until octaves) {
+        x *= lacunarity
+        y *= lacunarity
+        amp *= gain
+        sum += Math.abs(noise(seed + i, x, y) * 2.0 - 1.0) * amp
+    }
+    return sum
+}
+
+inline fun rigid(seed: Int, x: Double, y: Double, crossinline noise: (Int, Double, Double) -> Double,
+                 octaves: Int = 8, lacunarity: Double = 0.5, gain: Double = 0.5): Double {
+    var sum = 1.0 - Math.abs(noise(seed, x, y))
+    var amp = 1.0
+
+    var x = x
+    var y = y
+    for (i in 1 until octaves) {
+        x *= lacunarity
+        y *= lacunarity
+        amp *= gain
+        sum -= (1.0 - Math.abs(noise(seed + i, x, y))) * amp
+    }
+    return sum
+}
+
+inline fun rigid(seed: Int, x: Double, y: Double, z: Double, crossinline noise: (Int, Double, Double, Double) -> Double,
+                 octaves: Int = 8, lacunarity: Double = 0.5, gain: Double = 0.5): Double {
+    var sum = 1.0 - Math.abs(noise(seed, x, y, z))
+    var amp = 1.0
+
+    var x = x
+    var y = y
+    var z = z
+    for (i in 1 until octaves) {
+        x *= lacunarity
+        y *= lacunarity
+        z *= lacunarity
+        amp *= gain
+        sum -= (1.0 - Math.abs(noise(seed + i, x, y, z))) * amp
+    }
+    return sum
+}
+