[orx-shapes] Fix RectifiedPath.kt for closed contours; Closes #334

orx-shapes/src/commonMain/kotlin/rectify/RectifiedPath.kt

@@ -14,9 +14,11 @@ abstract class RectifiedPath<T : EuclideanVector<T>>(
     distanceTolerance: Double = 0.5,
     lengthScale: Double = 1.0
 ) {
-    val points =
+    val candidatePoints =
         originalPath.equidistantPositionsWithT((originalPath.length * lengthScale).toInt().coerceAtLeast(2), distanceTolerance)
 
+    val points = if (originalPath.closed) candidatePoints + candidatePoints.first() else candidatePoints
+
     val intervals by lazy {
         points.zipWithNext().map {
             Pair(it.first.second, it.second.second)

orx-shapes/src/jvmDemo/kotlin/rectify/DemoRectifiedContour04.kt

@@ -0,0 +1,27 @@
+package rectify
+import org.openrndr.application
+import org.openrndr.color.ColorRGBa
+import org.openrndr.extra.shapes.rectify.rectified
+import org.openrndr.shape.Circle
+import org.openrndr.shape.Segment2D
+
+fun main() = application {
+    configure {
+        width = 720
+        height = 720
+    }
+    program {
+        val c = Circle(drawer.bounds.center, 50.0).contour
+        val rc = c.rectified()
+        val normals = List(200) {
+            val t = it / 200.0
+            val p = rc.position(t)
+            val n = rc.normal(t)
+            Segment2D(p, p + n * 200.0)
+        }
+        extend {
+            drawer.clear(ColorRGBa.WHITE)
+            drawer.segments(normals)
+        }
+    }
+}