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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_inserter | |
11 | //` Simplify a linestring using a back inserter | |
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 | int main() | |
20 | { | |
21 | typedef boost::geometry::model::d2::point_xy<double> P; | |
22 | typedef boost::geometry::model::linestring<P> L; | |
23 | ||
24 | L line; | |
25 | line.push_back(P(1.1, 1.1)); | |
26 | line.push_back(P(2.5, 2.1)); | |
27 | line.push_back(P(3.1, 3.1)); | |
28 | line.push_back(P(4.9, 1.1)); | |
29 | line.push_back(P(3.1, 1.9)); | |
30 | ||
31 | L simplified; | |
32 | boost::geometry::simplify_inserter(line, std::back_inserter(simplified), 0.5); | |
33 | ||
34 | std::cout | |
35 | << " original: " << boost::geometry::dsv(line) << std::endl | |
36 | << "simplified: " << boost::geometry::dsv(simplified) << std::endl; | |
37 | ||
38 | return 0; | |
39 | } | |
40 | ||
41 | //] | |
42 | ||
43 | ||
44 | //[simplify_inserter_output | |
45 | /*` | |
46 | Output: | |
47 | [pre | |
48 | original: ((1.1, 1.1), (2.5, 2.1), (3.1, 3.1), (4.9, 1.1), (3.1, 1.9)) | |
49 | simplified: ((1.1, 1.1), (3.1, 3.1), (4.9, 1.1), (3.1, 1.9)) | |
50 | ] | |
51 | */ | |
52 | //] |