Ticket #10412: main_boost_geometry_incorrect_polygon_offset.cpp

#include <iostream>

#include <boost/geometry/geometry.hpp>

#include <boost/geometry/geometries/point_xy.hpp>
#include <boost/geometry/geometries/polygon.hpp>
#include <boost/geometry/geometries/multi_polygon.hpp>

#include <boost/geometry/algorithms/buffer.hpp>

#include <boost/geometry/strategies/cartesian/buffer_join_miter.hpp>
#include <boost/geometry/strategies/cartesian/buffer_end_flat.hpp>
#include <boost/geometry/strategies/cartesian/buffer_point_square.hpp>
#include <boost/geometry/strategies/cartesian/buffer_side_straight.hpp>

#include <boost/geometry/io/wkt/read.hpp>
#include <boost/geometry/io/wkt/write.hpp>

using namespace std;

typedef double coordinate_type;
typedef boost::geometry::model::d2::point_xy<coordinate_type> point_xy_type;
typedef boost::geometry::model::polygon<point_xy_type> polygon_type;
boost::geometry::strategy::buffer::end_flat end_strategy;
boost::geometry::strategy::buffer::point_square point_strategy;
boost::geometry::strategy::buffer::side_straight side_strategy;

int main(int argc, char** argv)
{
    string polygon_geometry = "POLYGON((897747.8 6270564.3,897764.3 6270569.7,897776.5 6270529.5,897768.1 6270527.1,897767.6 6270529.4,897756.3 6270525.8,897745.8 6270522.3,897752 6270502.9,897749.7 6270502,897750.7 6270499.1,897751.8 6270498.6,897752.3 6270499.3,897754.6 6270497.9,897755.8 6270500.2,897766.8 6270494.1,897765.6 6270491.5,897768.3 6270490.5,897770.9 6270491.5,897770.2 6270494.6,897780.1 6270497.5,897781 6270494.6,897786.8 6270496.6,897790.8 6270482.5,897785.3 6270480.7,897785.9 6270478.2,897768.9 6270473.2,897768.1 6270475.8,897766.1 6270475.2,897758.7 6270479.2,897753.2 6270481.8,897751.9 6270479,897746.5 6270481.9,897748 6270484.6,897745.2 6270486.1,897743.9 6270483.3,897741.4 6270484.7,897742.6 6270487.3,897739.4 6270488.9,897738.3 6270486.3,897735.6 6270487.8,897733.1 6270496.8,897731.2 6270502.7,897732.4 6270503.2,897731.5 6270506.1,897730.3 6270505.7,897725.8 6270520.2,897726.8 6270520.7,897726 6270523,897728 6270523.7,897726.3 6270529.6,897742.8 6270534.5,897741.2 6270539.9,897751.4 6270543.4,897750.7 6270546.4,897753.2 6270547.2,897747.8 6270564.3))";

    double offset_distance = 1.5;

    boost::geometry::strategy::buffer::distance_symmetric<coordinate_type> distance_strategy(offset_distance);
    boost::geometry::strategy::buffer::join_miter join_strategy(offset_distance);

    polygon_type input;
    boost::geometry::model::multi_polygon<polygon_type> output;

    boost::geometry::read_wkt(polygon_geometry, input);

    boost::geometry::buffer(input, output, distance_strategy, side_strategy, join_strategy, end_strategy, point_strategy);

    return 0;
}