1 // Boost.Geometry (aka GGL, Generic Geometry Library)
4 // Copyright (c) 2014 Barend Gehrels, Amsterdam, the Netherlands.
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)
11 //` Shows how the join_miter strategy can be used as a JoinStrategy to create sharp corners
13 #include <boost/geometry.hpp>
14 #include <boost/geometry/geometries/point_xy.hpp>
15 #include <boost/geometry/geometries/geometries.hpp>
16 /*<-*/ #include "../examples_utils/create_svg_buffer.hpp" /*->*/
20 typedef boost::geometry::model::d2::point_xy
<double> point
;
21 typedef boost::geometry::model::polygon
<point
> polygon
;
23 // Declare the join_miter strategy
24 boost::geometry::strategy::buffer::join_miter join_strategy
;
26 // Declare other strategies
27 boost::geometry::strategy::buffer::distance_symmetric
<double> distance_strategy(0.5);
28 boost::geometry::strategy::buffer::end_flat end_strategy
;
29 boost::geometry::strategy::buffer::side_straight side_strategy
;
30 boost::geometry::strategy::buffer::point_circle point_strategy
;
32 // Declare/fill a multi polygon
33 boost::geometry::model::multi_polygon
<polygon
> mp
;
34 boost::geometry::read_wkt("MULTIPOLYGON(((5 5,7 8,9 5,5 5)),((8 7,8 10,11 10,11 7,8 7)))", mp
);
36 // Create the buffered geometry with sharp corners
37 boost::geometry::model::multi_polygon
<polygon
> result
;
38 boost::geometry::buffer(mp
, result
,
39 distance_strategy
, side_strategy
,
40 join_strategy
, end_strategy
, point_strategy
);
41 /*<-*/ create_svg_buffer("buffer_join_miter.svg", mp
, result
); /*->*/