1 files changed, 46 insertions, 0 deletions
diff --git a/libs/geometry/test/robustness/common/make_square_polygon.hpp b/libs/geometry/test/robustness/common/make_square_polygon.hpp
new file mode 100644
index 000000000..764fc4bb8
--- /dev/null
+++ b/libs/geometry/test/robustness/common/make_square_polygon.hpp
@@ -0,0 +1,46 @@
+// Boost.Geometry (aka GGL, Generic Geometry Library)
+// Robustness Test
+//
+// Copyright (c) 2009-2012 Barend Gehrels, Amsterdam, the Netherlands.
+// 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_GEOMETRY_TEST_ROBUSTNESS_MAKE_SQUARE_POLYGON_HPP
+#define BOOST_GEOMETRY_TEST_ROBUSTNESS_MAKE_SQUARE_POLYGON_HPP
+
+#include <boost/geometry.hpp>
+
+template <typename Polygon, typename Generator, typename Settings>
+inline void make_square_polygon(Polygon& polygon, Generator& generator, Settings const& settings)
+{
+    using namespace boost::geometry;
+    
+    typedef typename point_type<Polygon>::type point_type;
+    typedef typename coordinate_type<Polygon>::type coordinate_type;
+
+    coordinate_type x, y;
+    x = generator();
+    y = generator();
+
+    typename ring_type<Polygon>::type& ring = exterior_ring(polygon);
+
+    point_type p;
+    set<0>(p, x); set<1>(p, y);         append(ring, p);
+    set<0>(p, x); set<1>(p, y + 1);     append(ring, p);
+    set<0>(p, x + 1); set<1>(p, y + 1); append(ring, p);
+    set<0>(p, x + 1); set<1>(p, y);     append(ring, p);
+    set<0>(p, x); set<1>(p, y);         append(ring, p);
+
+    if (settings.triangular)
+    {
+        // Remove a point, generator says which
+        int c = generator() % 4;
+        if (c >= 1 && c <= 3)
+        {
+            ring.erase(ring.begin() + c);
+        }
+    }
+}
+
+#endif // BOOST_GEOMETRY_TEST_ROBUSTNESS_MAKE_SQUARE_POLYGON_HPP