1 // Boost.Geometry (aka GGL, Generic Geometry Library)
2 // QuickBook Example
3
4 // Copyright (c) 2011-2012 Barend Gehrels, Amsterdam, the Netherlands.
5 // Copyright (c) 2014 Adam Wulkiewicz, Lodz, Poland.
6
7 // Use, modification and distribution is subject to the Boost Software License,
8 // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
9 // http://www.boost.org/LICENSE_1_0.txt)
10
11 //[boost_polygon_polygon
12 //`Shows how to use Boost.Polygon polygon_with_holes_data within Boost.Geometry
13
14 #include <iostream>
15 #include <boost/geometry.hpp>
16 #include <boost/geometry/geometries/adapted/boost_polygon.hpp>
17
main()18 int main()
19 {
20 typedef boost::polygon::polygon_with_holes_data<int> polygon;
21 typedef boost::polygon::polygon_traits<polygon>::point_type point;
22 typedef boost::polygon::polygon_with_holes_traits<polygon>::hole_type hole;
23
24 point pts[5] = {
25 boost::polygon::construct<point>(0, 0),
26 boost::polygon::construct<point>(0, 10),
27 boost::polygon::construct<point>(10, 10),
28 boost::polygon::construct<point>(10, 0),
29 boost::polygon::construct<point>(0, 0)
30 };
31 point hole_pts[5] = {
32 boost::polygon::construct<point>(1, 1),
33 boost::polygon::construct<point>(9, 1),
34 boost::polygon::construct<point>(9, 9),
35 boost::polygon::construct<point>(1, 9),
36 boost::polygon::construct<point>(1, 1)
37 };
38
39 hole hls[1];
40 boost::polygon::set_points(hls[0], hole_pts, hole_pts+5);
41
42 polygon poly;
43 boost::polygon::set_points(poly, pts, pts+5);
44 boost::polygon::set_holes(poly, hls, hls+1);
45
46 std::cout << "Area (using Boost.Geometry): "
47 << boost::geometry::area(poly) << std::endl;
48 std::cout << "Area (using Boost.Polygon): "
49 << boost::polygon::area(poly) << std::endl;
50
51 return 0;
52 }
53
54 //]
55
56 //[boost_polygon_polygon_output
57 /*`
58 Output:
59 [pre
60 Area (using Boost.Geometry): 36
61 Area (using Boost.Polygon): 36
62 ]
63 */
64 //]
65