[orx-noise] Add ShapeProvider.poissonDiskSampling

orx-noise/src/commonMain/kotlin/ShapeNoise.kt

@@ -0,0 +1,31 @@
+package org.openrndr.extra.noise
+
+import org.openrndr.math.Vector2
+import org.openrndr.shape.*
+import kotlin.random.Random
+
+fun ShapeProvider.uniform(random: Random = Random.Default): Vector2 {
+    val shape = shape
+    return Vector2.uniformSequence(shape.bounds, random).first {
+        shape.contains(it)
+    }
+}
+
+fun ShapeProvider.poissonDiskSampling(
+    r: Double,
+    tries: Int = 30,
+    random: Random = Random.Default
+): List<Vector2> {
+    val shape = shape
+    val bounds = shape.bounds
+    val poissonBounds = Rectangle(0.0, 0.0, bounds.width, bounds.height)
+
+    val initialPoint = this.uniform(random).map(bounds, poissonBounds)
+
+    return poissonDiskSampling(bounds.width, bounds.height, r, tries, false, random, initialPoint) { _, _, point ->
+        val contourPoint = point.map(poissonBounds, bounds)
+        shape.contains(contourPoint)
+    }.map {
+        it.map(poissonBounds, bounds)
+    }
+}