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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 | ||
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 | //] |