ceph/src/boost/libs/geometry/test/robustness/common/make_square_polygon.hpp

   1 // Boost.Geometry (aka GGL, Generic Geometry Library)
   2 // Robustness Test
   3 //
   4 // Copyright (c) 2009-2012 Barend Gehrels, Amsterdam, the Netherlands.
   5 // Use, modification and distribution is subject to the Boost Software License,
   6 // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
   7 // http://www.boost.org/LICENSE_1_0.txt)
   8
   9 #ifndef BOOST_GEOMETRY_TEST_ROBUSTNESS_MAKE_SQUARE_POLYGON_HPP
  10 #define BOOST_GEOMETRY_TEST_ROBUSTNESS_MAKE_SQUARE_POLYGON_HPP
  11
  12 #include <boost/geometry.hpp>
  13
  14 template <typename Polygon, typename Generator, typename Settings>
  15 inline void make_square_polygon(Polygon& polygon, Generator& generator, Settings const& settings)
  16 {
  17     using namespace boost::geometry;
  18
  19     typedef typename point_type<Polygon>::type point_type;
  20     typedef typename coordinate_type<Polygon>::type coordinate_type;
  21
  22     coordinate_type x, y;
  23     x = generator();
  24     y = generator();
  25
  26     typename ring_type<Polygon>::type& ring = exterior_ring(polygon);
  27
  28     point_type p;
  29     set<0>(p, x); set<1>(p, y);         append(ring, p);
  30     set<0>(p, x); set<1>(p, y + 1);     append(ring, p);
  31     set<0>(p, x + 1); set<1>(p, y + 1); append(ring, p);
  32     set<0>(p, x + 1); set<1>(p, y);     append(ring, p);
  33     set<0>(p, x); set<1>(p, y);         append(ring, p);
  34
  35     if (settings.triangular)
  36     {
  37         // Remove a point, generator says which
  38         int c = generator() % 4;
  39         if (c >= 1 && c <= 3)
  40         {
  41             ring.erase(ring.begin() + c);
  42         }
  43     }
  44 }
  45
  46 #endif // BOOST_GEOMETRY_TEST_ROBUSTNESS_MAKE_SQUARE_POLYGON_HPP