mirror of
https://github.com/boostorg/geometry.git
synced 2025-05-10 07:34:03 +00:00
200 lines
6.8 KiB
C++
200 lines
6.8 KiB
C++
// Boost.Geometry (aka GGL, Generic Geometry Library)
|
|
// Unit Test
|
|
|
|
// Copyright (c) 2012-2014 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)
|
|
|
|
#include <test_buffer.hpp>
|
|
|
|
#include <boost/geometry/multi/geometries/multi_geometries.hpp>
|
|
|
|
static std::string const simplex = "MULTIPOINT((5 5),(7 7))";
|
|
static std::string const three = "MULTIPOINT((5 8),(9 8),(7 11))";
|
|
|
|
// Generates error (extra polygon on top of rest) at distance 14.0:
|
|
static std::string const multipoint_a = "MULTIPOINT((39 44),(38 37),(41 29),(15 33),(58 39))";
|
|
|
|
// Just one with holes at distance ~ 15
|
|
static std::string const multipoint_b = "MULTIPOINT((5 56),(98 67),(20 7),(58 60),(10 4),(75 68),(61 68),(75 62),(92 26),(74 6),(67 54),(20 43),(63 30),(45 7))";
|
|
|
|
|
|
template <typename P>
|
|
void test_all()
|
|
{
|
|
//std::cout << typeid(bg::coordinate_type<P>::type).name() << std::endl;
|
|
|
|
namespace buf = bg::strategy::buffer;
|
|
typedef bg::model::polygon<P> polygon;
|
|
typedef bg::model::multi_point<P> multi_point_type;
|
|
|
|
double const pi = boost::geometry::math::pi<double>();
|
|
|
|
test_one<multi_point_type, buf::join_miter, buf::end_round, polygon>("simplex1", simplex, 2.0 * pi, 1.0, 1.0);
|
|
test_one<multi_point_type, buf::join_miter, buf::end_round, polygon>("simplex2", simplex, 22.8372, 2.0, 2.0);
|
|
test_one<multi_point_type, buf::join_miter, buf::end_round, polygon>("simplex3", simplex, 44.5692, 3.0, 3.0);
|
|
|
|
test_one<multi_point_type, buf::join_miter, buf::end_round, polygon>("three1", three, 3.0 * pi, 1.0, 1.0);
|
|
test_one<multi_point_type, buf::join_miter, buf::end_round, polygon>("three2", three, 36.7592, 2.0, 2.0);
|
|
test_one<multi_point_type, buf::join_miter, buf::end_round, polygon>("three19", three, 33.6914, 1.9, 1.9);
|
|
test_one<multi_point_type, buf::join_miter, buf::end_round, polygon>("three21", three, 39.6394, 2.1, 2.1);
|
|
test_one<multi_point_type, buf::join_miter, buf::end_round, polygon>("three3", three, 65.533, 3.0, 3.0);
|
|
|
|
test_one<multi_point_type, buf::join_miter, buf::end_round, polygon>("multipoint_a", multipoint_a, 2049.98, 14.0, 14.0);
|
|
test_one<multi_point_type, buf::join_miter, buf::end_round, polygon>("multipoint_b", multipoint_b, 7109.88, 15.0, 15.0);
|
|
test_one<multi_point_type, buf::join_miter, buf::end_round, polygon>("multipoint_b1", multipoint_b, 6911.89, 14.7, 14.7);
|
|
test_one<multi_point_type, buf::join_miter, buf::end_round, polygon>("multipoint_b2", multipoint_b, 7174.79, 15.1, 15.1);
|
|
}
|
|
|
|
template
|
|
<
|
|
typename GeometryOut,
|
|
template<typename, typename> class JoinStrategy,
|
|
template<typename, typename> class EndStrategy,
|
|
typename Geometry
|
|
>
|
|
double test_growth(Geometry const& geometry, int n, int d, double distance)
|
|
{
|
|
namespace bg = boost::geometry;
|
|
|
|
typedef typename bg::coordinate_type<Geometry>::type coordinate_type;
|
|
typedef typename bg::point_type<Geometry>::type point_type;
|
|
|
|
// extern int point_buffer_count;
|
|
std::ostringstream complete;
|
|
complete
|
|
<< "point" << "_"
|
|
<< "growth" << "_"
|
|
<< string_from_type<coordinate_type>::name()
|
|
<< "_" << "r"
|
|
<< "_" << n
|
|
<< "_" << d
|
|
// << "_" << point_buffer_count
|
|
;
|
|
|
|
//std::cout << complete.str() << std::endl;
|
|
|
|
std::ostringstream filename;
|
|
filename << "buffer_" << complete.str() << ".svg";
|
|
|
|
std::ofstream svg(filename.str().c_str());
|
|
|
|
#ifdef BOOST_GEOMETRY_DEBUG_WITH_MAPPER
|
|
bg::svg_mapper<point_type> mapper(svg, 500, 500);
|
|
|
|
{
|
|
bg::model::box<point_type> box;
|
|
bg::envelope(geometry, box);
|
|
|
|
bg::buffer(box, box, distance * 1.01);
|
|
mapper.add(box);
|
|
}
|
|
#endif
|
|
|
|
JoinStrategy
|
|
<
|
|
point_type,
|
|
typename bg::point_type<GeometryOut>::type
|
|
> join_strategy;
|
|
EndStrategy
|
|
<
|
|
point_type,
|
|
typename bg::point_type<GeometryOut>::type
|
|
> end_strategy;
|
|
|
|
typedef bg::strategy::buffer::distance_symmetric<coordinate_type> distance_strategy_type;
|
|
distance_strategy_type distance_strategy(distance);
|
|
|
|
std::vector<GeometryOut> buffered;
|
|
|
|
typedef typename bg::rescale_policy_type<point_type>::type
|
|
rescale_policy_type;
|
|
rescale_policy_type rescale_policy
|
|
= bg::get_rescale_policy<rescale_policy_type>(geometry);
|
|
|
|
bg::detail::buffer::buffer_inserter<GeometryOut>(geometry,
|
|
std::back_inserter(buffered),
|
|
distance_strategy,
|
|
join_strategy,
|
|
end_strategy,
|
|
rescale_policy
|
|
#ifdef BOOST_GEOMETRY_DEBUG_WITH_MAPPER
|
|
, mapper
|
|
#endif
|
|
);
|
|
|
|
typename bg::default_area_result<GeometryOut>::type area = 0;
|
|
BOOST_FOREACH(GeometryOut const& polygon, buffered)
|
|
{
|
|
area += bg::area(polygon);
|
|
}
|
|
|
|
#ifdef BOOST_GEOMETRY_DEBUG_WITH_MAPPER
|
|
// Map input geometry in green
|
|
mapper.map(geometry, "opacity:0.5;fill:rgb(0,128,0);stroke:rgb(0,128,0);stroke-width:10");
|
|
|
|
BOOST_FOREACH(GeometryOut const& polygon, buffered)
|
|
{
|
|
mapper.map(polygon, "opacity:0.4;fill:rgb(255,255,128);stroke:rgb(0,0,0);stroke-width:3");
|
|
}
|
|
#endif
|
|
|
|
return area;
|
|
}
|
|
|
|
template <typename P>
|
|
void test_growth(int n, int distance_count)
|
|
{
|
|
srand(int(time(NULL)));
|
|
//std::cout << typeid(bg::coordinate_type<P>::type).name() << std::endl;
|
|
boost::timer t;
|
|
|
|
namespace buf = bg::strategy::buffer;
|
|
typedef bg::model::polygon<P> polygon;
|
|
typedef bg::model::multi_point<P> multi_point_type;
|
|
|
|
multi_point_type multi_point;
|
|
for (int i = 0; i < n; i++)
|
|
{
|
|
P point(rand() % 100, rand() % 100);
|
|
multi_point.push_back(point);
|
|
}
|
|
|
|
//std::cout << bg::wkt(multi_point) << std::endl;
|
|
|
|
double previous_area = 0;
|
|
double epsilon = 0.1;
|
|
double distance = 15.0;
|
|
for (int d = 0; d < distance_count; d++, distance += epsilon)
|
|
{
|
|
double area = test_growth<polygon, buf::join_miter, buf::end_round>(multi_point, n, d, distance);
|
|
if (area < previous_area)
|
|
{
|
|
std::cout << "Error: " << area << " < " << previous_area << std::endl
|
|
<< " n=" << n << " distance=" << distance
|
|
<< bg::wkt(multi_point) << std::endl;
|
|
}
|
|
previous_area = area;
|
|
}
|
|
std::cout << "n=" << n << " time=" << t.elapsed() << std::endl;
|
|
}
|
|
|
|
int test_main(int, char* [])
|
|
{
|
|
//std::cout << std::setprecision(6);
|
|
//test_all<bg::model::point<float, 2, bg::cs::cartesian> >();
|
|
test_all<bg::model::point<double, 2, bg::cs::cartesian> >();
|
|
|
|
|
|
#ifdef BOOST_GEOMETRY_BUFFER_TEST_GROWTH
|
|
for (int i = 5; i <= 50; i++)
|
|
{
|
|
test_growth<bg::model::point<double, 2, bg::cs::cartesian> >(i, 20);
|
|
}
|
|
#endif
|
|
|
|
return 0;
|
|
}
|