1 // Boost.Geometry (aka GGL, Generic Geometry Library)
2 // QuickBook Example
3
4 // Copyright (c) 2011-2012 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 //[simplify
11 //` Example showing how to simplify a linestring
12
13 #include <iostream>
14
15 #include <boost/geometry.hpp>
16 #include <boost/geometry/geometries/linestring.hpp>
17 #include <boost/geometry/geometries/point_xy.hpp>
18
19 /*< For this example we use Boost.Assign to add points >*/
20 #include <boost/assign.hpp>
21
22 using namespace boost::assign;
23
24
main()25 int main()
26 {
27 typedef boost::geometry::model::d2::point_xy<double> xy;
28
29 boost::geometry::model::linestring<xy> line;
30 line += xy(1.1, 1.1), xy(2.5, 2.1), xy(3.1, 3.1), xy(4.9, 1.1), xy(3.1, 1.9); /*< With Boost.Assign >*/
31
32 // Simplify it, using distance of 0.5 units
33 boost::geometry::model::linestring<xy> simplified;
34 boost::geometry::simplify(line, simplified, 0.5);
35 std::cout
36 << " original: " << boost::geometry::dsv(line) << std::endl
37 << "simplified: " << boost::geometry::dsv(simplified) << std::endl;
38
39
40 return 0;
41 }
42
43 //]
44
45
46 //[simplify_output
47 /*`
48 Output:
49 [pre
50 original: ((1.1, 1.1), (2.5, 2.1), (3.1, 3.1), (4.9, 1.1), (3.1, 1.9))
51 simplified: ((1.1, 1.1), (3.1, 3.1), (4.9, 1.1), (3.1, 1.9))
52 ]
53 */
54 //]
55