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/Src/Dependencies/Boost/libs/geometry/doc/src/examples/algorithms/envelope.cpp

http://hadesmem.googlecode.com/
C++ | 55 lines | 20 code | 16 blank | 19 comment | 0 complexity | 562e28d86afbf8ab0d1d094b3bca5ee0 MD5 | raw file
 1// Boost.Geometry (aka GGL, Generic Geometry Library)
 2// QuickBook Example
 3
 4// Copyright (c) 2011 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//[envelope
11//` Shows how to calculate the bounding box of a polygon
12
13#include <iostream>
14
15#include <boost/geometry.hpp>
16#include <boost/geometry/geometries/box.hpp>
17#include <boost/geometry/geometries/point_xy.hpp>
18#include <boost/geometry/geometries/polygon.hpp>
19#include <boost/geometry/domains/gis/io/wkt/wkt.hpp>
20
21/*<-*/ #include "create_svg_two.hpp" /*->*/
22
23int main()
24{
25    typedef boost::geometry::model::d2::point_xy<double> point;
26
27    boost::geometry::model::polygon<point> polygon;
28
29    boost::geometry::read_wkt(
30        "POLYGON((2 1.3,2.4 1.7,2.8 1.8,3.4 1.2,3.7 1.6,3.4 2,4.1 3,5.3 2.6,5.4 1.2,4.9 0.8,2.9 0.7,2 1.3)"
31            "(4.0 2.0, 4.2 1.4, 4.8 1.9, 4.4 2.2, 4.0 2.0))", polygon);
32
33    boost::geometry::model::box<point> box;
34    boost::geometry::envelope(polygon, box);
35
36    std::cout << "envelope:" << boost::geometry::dsv(box) << std::endl;
37
38    /*<-*/ create_svg("envelope.svg", polygon, box); /*->*/
39    return 0;
40}
41
42//]
43
44
45//[envelope_output
46/*`
47Output:
48[pre
49envelope:((2, 0.7), (5.4, 3))
50
51[$img/algorithms/envelope.png]
52]
53*/
54//]
55