Added partial port of fastnoise-java

orx-noise/src/main/kotlin/Interpolation.kt

@@ -0,0 +1,24 @@
+package org.openrndr.extra.noise
+
+
+
+fun hermite(t: Double): Double {
+    return t * t * (3 - 2 * t)
+}
+
+fun quintic(t: Double): Double {
+    return t * t * t * (t * (t * 6 - 15) + 10)
+}
+
+fun cubic(a: Double, b: Double, c: Double, d: Double, t: Double) : Double {
+    val p = d - c - (a - b)
+    return t * t * t * p + t * t * (a - b - p) + t * (c - a) + b
+}
+
+fun linear(x: Double) : Double {
+    return x
+}
+
+fun lerp(left: Double, right: Double, x: Double): Double {
+    return left * (1.0 - x) + right * x
+}