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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 | ||
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 | ||
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 | //] |