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 //[unique
11 //` Shows how to make a so-called minimal set of a polygon by removing duplicate points
12
13 #include <iostream>
14
15 #include <boost/geometry.hpp>
16 #include <boost/geometry/geometries/polygon.hpp>
17 #include <boost/geometry/geometries/adapted/boost_tuple.hpp>
18
BOOST_GEOMETRY_REGISTER_BOOST_TUPLE_CS(cs::cartesian)19 BOOST_GEOMETRY_REGISTER_BOOST_TUPLE_CS(cs::cartesian)
20
21 int main()
22 {
23 boost::geometry::model::polygon<boost::tuple<double, double> > poly;
24 boost::geometry::read_wkt("POLYGON((0 0,0 0,0 5,5 5,5 5,5 5,5 0,5 0,0 0,0 0,0 0,0 0))", poly);
25 boost::geometry::unique(poly);
26 std::cout << boost::geometry::wkt(poly) << std::endl;
27
28 return 0;
29 }
30
31 //]
32
33
34 //[unique_output
35 /*`
36 Output:
37 [pre
38 POLYGON((0 0,0 5,5 5,5 0,0 0))
39 ]
40 */
41 //]
42