ceph/src/boost/libs/geometry/test/robustness/convex_hull/random_multi_points.cpp

   1 // Boost.Geometry (aka GGL, Generic Geometry Library)
   2 // Robustness Test - convex_hull
   3
   4 // Copyright (c) 2012-2015 Barend Gehrels, Amsterdam, the Netherlands.
   5
   6 // Use, modification and distribution is subject to the Boost Software License,
   7 // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
   8 // http://www.boost.org/LICENSE_1_0.txt)
   9
  10 #define BOOST_GEOMETRY_NO_BOOST_TEST
  11
  12 #include <sstream>
  13 #include <fstream>
  14
  15 #include <boost/program_options.hpp>
  16 #include <boost/random/linear_congruential.hpp>
  17 #include <boost/random/uniform_int.hpp>
  18 #include <boost/random/uniform_real.hpp>
  19 #include <boost/random/variate_generator.hpp>
  20 #include <boost/timer.hpp>
  21
  22 #include <boost/geometry.hpp>
  23 #include <boost/geometry/geometries/geometries.hpp>
  24 #include <boost/geometry/geometries/point_xy.hpp>
  25 #include <boost/geometry/io/svg/svg_mapper.hpp>
  26
  27 struct settings_type
  28 {
  29     bool svg;
  30     bool wkt;
  31
  32     settings_type()
  33         : svg(false)
  34         , wkt(false)
  35     {}
  36 };
  37
  38 namespace bg = boost::geometry;
  39
  40 template <typename Geometry1, typename Geometry2>
  41 void create_svg(std::string const& filename, Geometry1 const& points, Geometry2 const& hull)
  42 {
  43     typedef typename boost::geometry::point_type<Geometry1>::type point_type;
  44
  45     boost::geometry::model::box<point_type> box;
  46     bg::envelope(hull, box);
  47     bg::buffer(box, box, 1.0);
  48
  49     std::ofstream svg(filename.c_str());
  50     boost::geometry::svg_mapper<point_type> mapper(svg, 800, 800);
  51     mapper.add(box);
  52
  53     mapper.map(hull, "opacity:0.8;fill:none;stroke:rgb(255,0,255);stroke-width:4;stroke-dasharray:1,7;stroke-linecap:round");
  54     mapper.map(points, "fill-opacity:0.5;fill:rgb(0,0,255);", 5);
  55 }
  56
  57
  58 template <typename MultiPoint, typename Generator>
  59 inline void make_multi_point(MultiPoint& mp, Generator& generator, int pcount)
  60 {
  61     typedef typename bg::point_type<MultiPoint>::type point_type;
  62     typedef typename bg::coordinate_type<MultiPoint>::type coordinate_type;
  63
  64     for(int i = 0; i < pcount; i++)
  65     {
  66         coordinate_type x, y;
  67         x = generator();
  68         y = generator();
  69
  70         point_type p;
  71         bg::set<0>(p, x);
  72         bg::set<1>(p, y);
  73
  74         mp.push_back(p);
  75     }
  76 }
  77
  78 template <typename MultiPoint, typename Polygon>
  79 bool check_hull(MultiPoint const& mp, Polygon const& poly)
  80 {
  81     for(typename boost::range_iterator<MultiPoint const>::type it = boost::begin(mp);
  82         it != boost::end(mp);
  83         ++it)
  84     {
  85         if (! bg::covered_by(*it, poly))
  86         {
  87             return false;
  88         }
  89     }
  90     return true;
  91 }
  92
  93
  94 template <typename MultiPoint, typename Generator>
  95 void test_random_multi_points(MultiPoint& result, int& index,
  96             Generator& generator,
  97             int pcount, settings_type const& settings)
  98 {
  99     typedef typename bg::point_type<MultiPoint>::type point_type;
 100
 101     MultiPoint mp;
 102     bg::model::polygon<point_type> hull;
 103
 104     make_multi_point(mp, generator, pcount);
 105     bg::convex_hull(mp, hull);
 106     // Check if each point lies in the hull
 107     bool correct = check_hull(mp, hull);
 108     if (! correct)
 109     {
 110         std::cout << "ERROR! " << std::endl
 111             << bg::wkt(mp) << std::endl
 112             << bg::wkt(hull) << std::endl
 113             << std::endl;
 114             ;
 115     }
 116
 117     if (settings.svg || ! correct)
 118     {
 119         std::ostringstream out;
 120         out << "random_mp_" << index++ << "_" << pcount << ".svg";
 121         create_svg(out.str(), mp, hull);
 122     }
 123     if (settings.wkt)
 124     {
 125         std::cout
 126             << "input: " << bg::wkt(mp) << std::endl
 127             << "output: " << bg::wkt(hull) << std::endl
 128             << std::endl;
 129             ;
 130     }
 131 }
 132
 133
 134 template <typename T>
 135 void test_all(int seed, int count, int field_size, int pcount, settings_type const& settings)
 136 {
 137     boost::timer t;
 138
 139     typedef boost::minstd_rand base_generator_type;
 140
 141     base_generator_type generator(seed);
 142
 143     boost::uniform_int<> random_coordinate(0, field_size - 1);
 144     boost::variate_generator<base_generator_type&, boost::uniform_int<> >
 145         coordinate_generator(generator, random_coordinate);
 146
 147     typedef bg::model::multi_point
 148         <
 149             bg::model::d2::point_xy<T>
 150         > mp;
 151
 152     int index = 0;
 153     for(int i = 0; i < count; i++)
 154     {
 155         mp p;
 156         test_random_multi_points<mp>(p, index, coordinate_generator, pcount, settings);
 157     }
 158     std::cout
 159         << "points: " << index
 160         << " type: " << typeid(T).name()
 161         << " time: " << t.elapsed()  << std::endl;
 162 }
 163
 164 int main(int argc, char** argv)
 165 {
 166     try
 167     {
 168         namespace po = boost::program_options;
 169         po::options_description description("=== random_multi_points ===\nAllowed options");
 170
 171         std::string type = "double";
 172         int count = 1;
 173         int seed = static_cast<unsigned int>(std::time(0));
 174         int pcount = 3;
 175         int field_size = 10;
 176         settings_type settings;
 177
 178         description.add_options()
 179             ("help", "Help message")
 180             ("seed", po::value<int>(&seed), "Initialization seed for random generator")
 181             ("count", po::value<int>(&count)->default_value(1), "Number of tests")
 182             ("number", po::value<int>(&pcount)->default_value(30), "Number of points")
 183             ("size", po::value<int>(&field_size)->default_value(10), "Size of the field")
 184             ("type", po::value<std::string>(&type)->default_value("double"), "Type (int,float,double)")
 185             ("wkt", po::value<bool>(&settings.wkt)->default_value(false), "Create a WKT of the inputs, for all tests")
 186             ("svg", po::value<bool>(&settings.svg)->default_value(false), "Create a SVG for all tests")
 187         ;
 188
 189         po::variables_map varmap;
 190         po::store(po::parse_command_line(argc, argv, description), varmap);
 191         po::notify(varmap);
 192
 193         if (varmap.count("help"))
 194         {
 195             std::cout << description << std::endl;
 196             return 1;
 197         }
 198
 199         if (type == "float")
 200         {
 201             test_all<float>(seed, count, field_size, pcount, settings);
 202         }
 203         else if (type == "double")
 204         {
 205             test_all<double>(seed, count, field_size, pcount, settings);
 206         }
 207         else if (type == "int")
 208         {
 209             test_all<int>(seed, count, field_size, pcount, settings);
 210         }
 211
 212     }
 213     catch(std::exception const& e)
 214     {
 215         std::cout << "Exception " << e.what() << std::endl;
 216     }
 217     catch(...)
 218     {
 219         std::cout << "Other exception" << std::endl;
 220     }
 221
 222     return 0;
 223 }