1 // Boost.Geometry (aka GGL, Generic Geometry Library)
2 // QuickBook Example
3
4 // Copyright (c) 2014 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 //[buffer_join_miter
11 //` Shows how the join_miter strategy can be used as a JoinStrategy to create sharp corners
12
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" /*->*/
17
main()18 int main()
19 {
20 typedef boost::geometry::model::d2::point_xy<double> point;
21 typedef boost::geometry::model::polygon<point> polygon;
22
23 // Declare the join_miter strategy
24 boost::geometry::strategy::buffer::join_miter join_strategy;
25
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;
31
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);
35
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); /*->*/
42
43 return 0;
44 }
45
46 //]
47
48