Ported make_clockwise() and make_counter_clockwise()

xs/src/Polygon.cpp

@@ -52,4 +52,24 @@ Polygon::is_counter_clockwise()
     return orientation;
 }
 
+bool
+Polygon::make_counter_clockwise()
+{
+    if (!this->is_counter_clockwise()) {
+        this->reverse();
+        return true;
+    }
+    return false;
+}
+
+bool
+Polygon::make_clockwise()
+{
+    if (this->is_counter_clockwise()) {
+        this->reverse();
+        return true;
+    }
+    return false;
+}
+
 }

xs/src/Polygon.hpp

@@ -16,6 +16,8 @@ class Polygon : public MultiPoint {
     Polyline* split_at_index(int index);
     Polyline* split_at_first_point();
     bool is_counter_clockwise();
+    bool make_counter_clockwise();
+    bool make_clockwise();
 };
 
 typedef std::vector<Polygon> Polygons;