[orx-noise] Add ShapeProvider.uniform() and List<Triangle>.uniform()

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

@@ -0,0 +1,25 @@
+package org.openrndr.extra.noise
+
+import org.openrndr.math.Vector2
+import org.openrndr.shape.Triangle
+
+/**
+ * Generate [count] uniform samples from a list of [Triangle]s
+ */
+fun List<Triangle>.uniform(count: Int): List<Vector2> {
+    val totalArea = this.sumOf { it.area }
+    val randoms = (0 until count).map {
+        Double.uniform(0.0, totalArea)
+    }.sorted()
+    val result = mutableListOf<Vector2>()
+    var idx = 0
+    var sum = 0.0
+    for (t in this) {
+        sum += t.area
+        while (idx < randoms.lastIndex && sum > randoms[idx]) {
+            result.add(t.randomPoint())
+            idx++
+        }
+    }
+    return result
+}