From f1a22744132d64a5c0d9391db0d925a953f77620 Mon Sep 17 00:00:00 2001
From: Luca Heltai <luca.heltai@sissa.it>
Date: Sun, 22 Jul 2018 16:38:31 +0200
Subject: [PATCH] Added boost::geometry point adaptor for deal.II

---
 include/deal.II/boost_adaptors/point.h    | 92 +++++++++++++++++++++++
 tests/boost/CMakeLists.txt                |  4 +
 tests/boost/boost_point_adaptor_01.cc     | 41 ++++++++++
 tests/boost/boost_point_adaptor_01.output |  3 +
 4 files changed, 140 insertions(+)
 create mode 100644 include/deal.II/boost_adaptors/point.h
 create mode 100644 tests/boost/CMakeLists.txt
 create mode 100644 tests/boost/boost_point_adaptor_01.cc
 create mode 100644 tests/boost/boost_point_adaptor_01.output

diff --git a/include/deal.II/boost_adaptors/point.h b/include/deal.II/boost_adaptors/point.h
new file mode 100644
index 0000000000..376a55242f
--- /dev/null
+++ b/include/deal.II/boost_adaptors/point.h
@@ -0,0 +1,92 @@
+// ---------------------------------------------------------------------
+//
+// Copyright (C) 2018 by the deal.II authors
+//
+// This file is part of the deal.II library.
+//
+// The deal.II library is free software; you can use it, redistribute
+// it, and/or modify it under the terms of the GNU Lesser General
+// Public License as published by the Free Software Foundation; either
+// version 2.1 of the License, or (at your option) any later version.
+// The full text of the license can be found in the file LICENSE.md at
+// the top level directory of deal.II.
+//
+// ---------------------------------------------------------------------
+
+#ifndef dealii_boost_adaptor_point_h
+#define dealii_boost_adaptor_point_h
+
+#include <deal.II/base/point.h>
+
+#include <boost/geometry.hpp>
+
+
+namespace boost
+{
+  namespace geometry
+  {
+    namespace traits
+    {
+      /**
+       * Tag adaptor for dealii::Point.
+       */
+      template <int dim, class Number>
+      struct tag<dealii::Point<dim, Number>>
+      {
+        typedef point_tag type;
+      };
+
+      /**
+       * Coordinate type adaptor for dealii::Point.
+       */
+      template <int dim, class Number>
+      struct coordinate_type<dealii::Point<dim, Number>>
+      {
+        typedef Number type;
+      };
+
+      /**
+       * Coordinate system adaptor for dealii::Point. By default, we assume
+       * that a dealii Point is cartesian point.
+       */
+      template <int dim, class Number>
+      struct coordinate_system<dealii::Point<dim, Number>>
+      {
+        typedef cs::cartesian type;
+      };
+
+      /**
+       * Dimension adaptor.
+       */
+      template <int dim, class Number>
+      struct dimension<dealii::Point<dim, Number>> : boost::mpl::int_<dim>
+      {};
+
+      /**
+       * Getter function for D-th coordinate of a dealii Point.
+       */
+      template <size_t D, int dim, class Number>
+      struct access<dealii::Point<dim, Number>, D>
+      {
+        static inline double
+        get(dealii::Point<dim, Number> const &p)
+        {
+          return p[D];
+        }
+
+        /**
+         * Setter function for D-th coordinate of a dealii Point.
+         */
+        static inline void
+        set(dealii::Point<dim, Number> &p, Number value)
+        {
+          p[D] = value;
+        }
+      };
+    } // namespace traits
+  }   // namespace geometry
+} // namespace boost
+
+
+
+#endif
diff --git a/tests/boost/CMakeLists.txt b/tests/boost/CMakeLists.txt
new file mode 100644
index 0000000000..d33eafa20b
--- /dev/null
+++ b/tests/boost/CMakeLists.txt
@@ -0,0 +1,4 @@
+CMAKE_MINIMUM_REQUIRED(VERSION 2.8.12)
+INCLUDE(../setup_testsubproject.cmake)
+PROJECT(testsuite CXX)
+DEAL_II_PICKUP_TESTS()
diff --git a/tests/boost/boost_point_adaptor_01.cc b/tests/boost/boost_point_adaptor_01.cc
new file mode 100644
index 0000000000..ebb17e0c6f
--- /dev/null
+++ b/tests/boost/boost_point_adaptor_01.cc
@@ -0,0 +1,41 @@
+// ---------------------------------------------------------------------
+//
+// Copyright (C) 2018 by the deal.II authors
+//
+// This file is part of the deal.II library.
+//
+// The deal.II library is free software; you can use it, redistribute
+// it, and/or modify it under the terms of the GNU Lesser General
+// Public License as published by the Free Software Foundation; either
+// version 2.1 of the License, or (at your option) any later version.
+// The full text of the license can be found in the file LICENSE.md at
+// the top level directory of deal.II.
+//
+// ---------------------------------------------------------------------
+
+// Check that boost adaptors for points work
+
+#include <deal.II/boost_adaptors/point.h>
+
+#include "../tests.h"
+
+namespace bg = boost::geometry;
+
+using bgPoint = bg::model::point<double, 3, bg::cs::cartesian>;
+
+int
+main(int argc, char **argv)
+{
+  initlog();
+
+  Point<3> p(1, 2, 3);
+  if (bg::equals(p, bg::make<Point<3>>(1, 2, 3)) == false)
+    deallog << "NOT OK" << std::endl;
+  else
+    deallog << "OK" << std::endl;
+
+  if (bg::equals(p, bg::make<bgPoint>(1., 2., 3.)) == false)
+    deallog << "NOT OK" << std::endl;
+  else
+    deallog << "OK" << std::endl;
+}
diff --git a/tests/boost/boost_point_adaptor_01.output b/tests/boost/boost_point_adaptor_01.output
new file mode 100644
index 0000000000..8b3b075900
--- /dev/null
+++ b/tests/boost/boost_point_adaptor_01.output
@@ -0,0 +1,3 @@
+
+DEAL::OK
+DEAL::OK
-- 
2.39.5