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_point_square
11 //` Shows how the point_square strategy can be used as a PointStrategy to create square buffers where the original point lies in the center
12
13
14 #include <boost/geometry.hpp>
15 #include <boost/geometry/geometries/point_xy.hpp>
16 #include <boost/geometry/geometries/geometries.hpp>
17 /*<-*/ #include "../examples_utils/create_svg_buffer.hpp" /*->*/
18
main()19 int main()
20 {
21 typedef boost::geometry::model::d2::point_xy<double> point;
22 typedef boost::geometry::model::polygon<point> polygon;
23
24 // Declare the point_square strategy
25 boost::geometry::strategy::buffer::point_square point_strategy;
26
27 // Declare other strategies
28 boost::geometry::strategy::buffer::distance_symmetric<double> distance_strategy(0.5);
29 boost::geometry::strategy::buffer::join_round join_strategy;
30 boost::geometry::strategy::buffer::end_round end_strategy;
31 boost::geometry::strategy::buffer::side_straight side_strategy;
32
33 // Declare/fill of a multi point
34 boost::geometry::model::multi_point<point> mp;
35 boost::geometry::read_wkt("MULTIPOINT((3 3),(3 4),(4 4),(7 3))", mp);
36
37 // Create the buffer of a multi point
38 boost::geometry::model::multi_polygon<polygon> result;
39 boost::geometry::buffer(mp, result,
40 distance_strategy, side_strategy,
41 join_strategy, end_strategy, point_strategy);
42 /*<-*/ create_svg_buffer("buffer_point_square.svg", mp, result); /*->*/
43
44 return 0;
45 }
46
47 //]
48
49