[orx-marching-squares] Add orx-marching-squares module

orx-marching-squares/src/jvmDemo/kotlin/FindContours02.kt

@@ -0,0 +1,24 @@
+import org.openrndr.application
+import org.openrndr.color.ColorRGBa
+import org.openrndr.extra.marchingsquares.findContours
+import org.openrndr.math.Vector2
+import kotlin.math.PI
+import kotlin.math.cos
+
+fun main() {
+    application {
+        configure {
+            width = 720
+            height = 720
+        }
+        program {
+            extend {
+                drawer.clear(ColorRGBa.BLACK)
+                drawer.stroke = ColorRGBa.PINK
+                fun f(v: Vector2) = cos((v.distanceTo(drawer.bounds.center) / 100.0) * 2 * PI)
+                val segments = findContours(::f, drawer.bounds.offsetEdges(32.0), 16.0)
+                drawer.lineSegments(segments)
+            }
+        }
+    }
+}