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// Boost.Geometry (aka GGL, Generic Geometry Library)
// Robustness Test - convex_hull
// Copyright (c) 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)
#define BOOST_GEOMETRY_REPORT_OVERLAY_ERROR
#define BOOST_GEOMETRY_NO_BOOST_TEST
#include <sstream>
#include <fstream>
#include <boost/program_options.hpp>
#include <boost/random/linear_congruential.hpp>
#include <boost/random/uniform_int.hpp>
#include <boost/random/uniform_real.hpp>
#include <boost/random/variate_generator.hpp>
#include <boost/timer.hpp>
#include <boost/geometry.hpp>
#include <boost/geometry/geometries/geometries.hpp>
#include <boost/geometry/geometries/point_xy.hpp>
#include <boost/geometry/multi/geometries/multi_geometries.hpp>
#include <boost/geometry/io/svg/svg_mapper.hpp>
struct settings_type
{
bool svg;
bool wkt;
settings_type()
: svg(false)
, wkt(false)
{}
};
namespace bg = boost::geometry;
template <typename Geometry1, typename Geometry2>
void create_svg(std::string const& filename, Geometry1 const& points, Geometry2 const& hull)
{
typedef typename boost::geometry::point_type<Geometry1>::type point_type;
boost::geometry::model::box<point_type> box;
bg::envelope(hull, box);
bg::buffer(box, box, 1.0);
std::ofstream svg(filename.c_str());
boost::geometry::svg_mapper<point_type> mapper(svg, 800, 800);
mapper.add(box);
mapper.map(hull, "opacity:0.8;fill:none;stroke:rgb(255,0,255);stroke-width:4;stroke-dasharray:1,7;stroke-linecap:round");
mapper.map(points, "fill-opacity:0.5;fill:rgb(0,0,255);", 5);
}
template <typename MultiPoint, typename Generator>
inline void make_multi_point(MultiPoint& mp, Generator& generator, int pcount)
{
typedef typename bg::point_type<MultiPoint>::type point_type;
typedef typename bg::coordinate_type<MultiPoint>::type coordinate_type;
for(int i = 0; i < pcount; i++)
{
coordinate_type x, y;
x = generator();
y = generator();
point_type p;
bg::set<0>(p, x);
bg::set<1>(p, y);
mp.push_back(p);
}
}
template <typename MultiPoint, typename Polygon>
bool check_hull(MultiPoint const& mp, Polygon const& poly)
{
for(typename boost::range_iterator<MultiPoint const>::type it = boost::begin(mp);
it != boost::end(mp);
++it)
{
if (! bg::covered_by(*it, poly))
{
return false;
}
}
return true;
}
template <typename MultiPoint, typename Generator>
void test_random_multi_points(MultiPoint& result, int& index,
Generator& generator,
int pcount, settings_type const& settings)
{
typedef typename bg::point_type<MultiPoint>::type point_type;
MultiPoint mp;
bg::model::polygon<point_type> hull;
make_multi_point(mp, generator, pcount);
bg::convex_hull(mp, hull);
// Check if each point lies in the hull
bool correct = check_hull(mp, hull);
if (! correct)
{
std::cout << "ERROR! " << std::endl
<< bg::wkt(mp) << std::endl
<< bg::wkt(hull) << std::endl
<< std::endl;
;
}
if (settings.svg || ! correct)
{
std::ostringstream out;
out << "random_mp_" << index++ << "_" << pcount << ".svg";
create_svg(out.str(), mp, hull);
}
if (settings.wkt)
{
std::cout
<< "input: " << bg::wkt(mp) << std::endl
<< "output: " << bg::wkt(hull) << std::endl
<< std::endl;
;
}
}
template <typename T>
void test_all(int seed, int count, int field_size, int pcount, settings_type const& settings)
{
boost::timer t;
typedef boost::minstd_rand base_generator_type;
base_generator_type generator(seed);
boost::uniform_int<> random_coordinate(0, field_size - 1);
boost::variate_generator<base_generator_type&, boost::uniform_int<> >
coordinate_generator(generator, random_coordinate);
typedef bg::model::multi_point
<
bg::model::d2::point_xy<T>
> mp;
int index = 0;
for(int i = 0; i < count; i++)
{
mp p;
test_random_multi_points<mp>(p, index, coordinate_generator, pcount, settings);
}
std::cout
<< "points: " << index
<< " type: " << typeid(T).name()
<< " time: " << t.elapsed() << std::endl;
}
int main(int argc, char** argv)
{
try
{
namespace po = boost::program_options;
po::options_description description("=== random_multi_points ===\nAllowed options");
std::string type = "double";
int count = 1;
int seed = static_cast<unsigned int>(std::time(0));
int pcount = 3;
int field_size = 10;
settings_type settings;
description.add_options()
("help", "Help message")
("seed", po::value<int>(&seed), "Initialization seed for random generator")
("count", po::value<int>(&count)->default_value(1), "Number of tests")
("number", po::value<int>(&pcount)->default_value(30), "Number of points")
("size", po::value<int>(&field_size)->default_value(10), "Size of the field")
("type", po::value<std::string>(&type)->default_value("double"), "Type (int,float,double)")
("wkt", po::value<bool>(&settings.wkt)->default_value(false), "Create a WKT of the inputs, for all tests")
("svg", po::value<bool>(&settings.svg)->default_value(false), "Create a SVG for all tests")
;
po::variables_map varmap;
po::store(po::parse_command_line(argc, argv, description), varmap);
po::notify(varmap);
if (varmap.count("help"))
{
std::cout << description << std::endl;
return 1;
}
if (type == "float")
{
test_all<float>(seed, count, field_size, pcount, settings);
}
else if (type == "double")
{
test_all<double>(seed, count, field_size, pcount, settings);
}
else if (type == "int")
{
test_all<int>(seed, count, field_size, pcount, settings);
}
}
catch(std::exception const& e)
{
std::cout << "Exception " << e.what() << std::endl;
}
catch(...)
{
std::cout << "Other exception" << std::endl;
}
return 0;
}
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