Incomplete work for using Boost.Polygon to compute medial axis

xs/src/boost/polygon/interval_traits.hpp

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+// Boost.Polygon library interval_traits.hpp header file
+
+// Copyright (c) Intel Corporation 2008.
+// Copyright (c) 2008-2012 Simonson Lucanus.
+// Copyright (c) 2012-2012 Andrii Sydorchuk.
+
+// See http://www.boost.org for updates, documentation, and revision history.
+// Use, modification and distribution is subject to the Boost Software License,
+// Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+
+#ifndef BOOST_POLYGON_INTERVAL_TRAITS_HPP
+#define BOOST_POLYGON_INTERVAL_TRAITS_HPP
+
+#include "isotropy.hpp"
+
+namespace boost {
+namespace polygon {
+
+template <typename Interval>
+struct interval_traits {
+  typedef Interval interval_type;
+  typedef typename interval_type::coordinate_type coordinate_type;
+
+  static coordinate_type get(const interval_type& interval, direction_1d dir) {
+    return interval.get(dir);
+  }
+};
+
+template <typename Interval>
+struct interval_mutable_traits {
+  typedef Interval interval_type;
+  typedef typename interval_type::coordinate_type coordinate_type;
+
+  static void set(
+      interval_type& interval, direction_1d dir, coordinate_type value) {
+    interval.set(dir, value);
+  }
+
+  static interval_type construct(coordinate_type low, coordinate_type high) {
+    return interval_type(low, high);
+  }
+};
+}  // polygon
+}  // boost
+
+#endif  // BOOST_POLICY_INTERVAL_TRAITS_HPP