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/CubicNoise3D.kt
+++ b/orx-noise/src/main/kotlin/CubicNoise3D.kt
@@ -0,0 +1,51 @@
+package org.openrndr.extra.noise
+
+
+private const val CUBIC_3D_BOUNDING = 1 / (1.5 * 1.5 * 1.5).toFloat()
+
+private fun cubic(seed: Int, x: Double, y: Double, z: Double): Double {
+    val x1 = x.fastFloor()
+    val y1 = y.fastFloor()
+    val z1 = z.fastFloor()
+
+    val x0 = x1 - 1
+    val y0 = y1 - 1
+    val z0 = z1 - 1
+    val x2 = x1 + 1
+    val y2 = y1 + 1
+    val z2 = z1 + 1
+    val x3 = x1 + 2
+    val y3 = y1 + 2
+    val z3 = z1 + 2
+
+    val xs = x - x1.toFloat()
+    val ys = y - y1.toFloat()
+    val zs = z - z1.toFloat()
+
+    return cubic(
+            cubic(
+                    cubic(valCoord3D(seed, x0, y0, z0), valCoord3D(seed, x1, y0, z0), valCoord3D(seed, x2, y0, z0), valCoord3D(seed, x3, y0, z0), xs),
+                    cubic(valCoord3D(seed, x0, y1, z0), valCoord3D(seed, x1, y1, z0), valCoord3D(seed, x2, y1, z0), valCoord3D(seed, x3, y1, z0), xs),
+                    cubic(valCoord3D(seed, x0, y2, z0), valCoord3D(seed, x1, y2, z0), valCoord3D(seed, x2, y2, z0), valCoord3D(seed, x3, y2, z0), xs),
+                    cubic(valCoord3D(seed, x0, y3, z0), valCoord3D(seed, x1, y3, z0), valCoord3D(seed, x2, y3, z0), valCoord3D(seed, x3, y3, z0), xs),
+                    ys),
+            cubic(
+                    cubic(valCoord3D(seed, x0, y0, z1), valCoord3D(seed, x1, y0, z1), valCoord3D(seed, x2, y0, z1), valCoord3D(seed, x3, y0, z1), xs),
+                    cubic(valCoord3D(seed, x0, y1, z1), valCoord3D(seed, x1, y1, z1), valCoord3D(seed, x2, y1, z1), valCoord3D(seed, x3, y1, z1), xs),
+                    cubic(valCoord3D(seed, x0, y2, z1), valCoord3D(seed, x1, y2, z1), valCoord3D(seed, x2, y2, z1), valCoord3D(seed, x3, y2, z1), xs),
+                    cubic(valCoord3D(seed, x0, y3, z1), valCoord3D(seed, x1, y3, z1), valCoord3D(seed, x2, y3, z1), valCoord3D(seed, x3, y3, z1), xs),
+                    ys),
+            cubic(
+                    cubic(valCoord3D(seed, x0, y0, z2), valCoord3D(seed, x1, y0, z2), valCoord3D(seed, x2, y0, z2), valCoord3D(seed, x3, y0, z2), xs),
+                    cubic(valCoord3D(seed, x0, y1, z2), valCoord3D(seed, x1, y1, z2), valCoord3D(seed, x2, y1, z2), valCoord3D(seed, x3, y1, z2), xs),
+                    cubic(valCoord3D(seed, x0, y2, z2), valCoord3D(seed, x1, y2, z2), valCoord3D(seed, x2, y2, z2), valCoord3D(seed, x3, y2, z2), xs),
+                    cubic(valCoord3D(seed, x0, y3, z2), valCoord3D(seed, x1, y3, z2), valCoord3D(seed, x2, y3, z2), valCoord3D(seed, x3, y3, z2), xs),
+                    ys),
+            cubic(
+                    cubic(valCoord3D(seed, x0, y0, z3), valCoord3D(seed, x1, y0, z3), valCoord3D(seed, x2, y0, z3), valCoord3D(seed, x3, y0, z3), xs),
+                    cubic(valCoord3D(seed, x0, y1, z3), valCoord3D(seed, x1, y1, z3), valCoord3D(seed, x2, y1, z3), valCoord3D(seed, x3, y1, z3), xs),
+                    cubic(valCoord3D(seed, x0, y2, z3), valCoord3D(seed, x1, y2, z3), valCoord3D(seed, x2, y2, z3), valCoord3D(seed, x3, y2, z3), xs),
+                    cubic(valCoord3D(seed, x0, y3, z3), valCoord3D(seed, x1, y3, z3), valCoord3D(seed, x2, y3, z3), valCoord3D(seed, x3, y3, z3), xs),
+                    ys),
+            zs) * CUBIC_3D_BOUNDING
+}