[orx-shapes] Improve contour adjuster framework

orx-shapes/src/jvmDemo/kotlin/adjust/DemoAdjustContour01.kt

@@ -0,0 +1,35 @@
+//package adjust
+
+import org.openrndr.application
+import org.openrndr.color.ColorRGBa
+import org.openrndr.extra.shapes.adjust.adjustContour
+import org.openrndr.math.Vector2
+import org.openrndr.shape.Circle
+import kotlin.math.cos
+import kotlin.math.sin
+
+fun main() {
+    application {
+        configure {
+            width = 800
+            height = 800
+        }
+        program {
+            extend {
+                var contour = Circle(drawer.bounds.center, 300.0).contour
+                contour = adjustContour(contour) {
+                    selectVertex(0)
+                    vertex.moveBy(Vector2(cos(seconds) * 40.0, sin(seconds * 0.43) * 40.0))
+
+                    selectVertex(2)
+                    vertex.rotate(seconds * 45.0)
+
+                    selectVertex(1)
+                    vertex.scale(cos(seconds*0.943)*2.0)
+                }
+                drawer.stroke = ColorRGBa.RED
+                drawer.contour(contour)
+            }
+        }
+    }
+}