1 // Boost.Geometry (aka GGL, Generic Geometry Library)
2 // Unit Test
3
4 // Copyright (c) 2007-2012 Barend Gehrels, Amsterdam, the Netherlands.
5 // Copyright (c) 2008-2012 Bruno Lalande, Paris, France.
6 // Copyright (c) 2009-2012 Mateusz Loskot, London, UK.
7
8 // Parts of Boost.Geometry are redesigned from Geodan's Geographic Library
9 // (geolib/GGL), copyright (c) 1995-2010 Geodan, Amsterdam, the Netherlands.
10
11 // Use, modification and distribution is subject to the Boost Software License,
12 // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
13 // http://www.boost.org/LICENSE_1_0.txt)
14
15
16 #include <geometry_test_common.hpp>
17
18
19 #include <boost/geometry/views/detail/range_type.hpp>
20 #include <boost/geometry/algorithms/detail/as_range.hpp>
21
22 #include <boost/geometry/core/cs.hpp>
23 #include <boost/geometry/geometries/geometries.hpp>
24
25 #include <boost/geometry/io/wkt/read.hpp>
26
27 template <int D, typename Range>
sum(Range const & range)28 double sum(Range const& range)
29 {
30 double s = 0.0;
31 for (typename boost::range_const_iterator<Range>::type it = boost::begin(range);
32 it != boost::end(range); ++it)
33 {
34 s += bg::get<D>(*it);
35 }
36 return s;
37 }
38
39 template <typename G>
test_geometry(std::string const & wkt,double expected_x,double expected_y)40 void test_geometry(std::string const& wkt, double expected_x, double expected_y)
41 {
42 G geometry;
43
44 // Declare a range-type, compatible with boost::range,
45 // such that range_iterator etc could be called
46 typedef typename bg::detail::range_type<G>::type range_type;
47
48 bg::read_wkt(wkt, geometry);
49
50 double s = sum<0>(bg::detail::as_range<range_type>(geometry));
51 BOOST_CHECK_CLOSE(s, expected_x, 0.001);
52
53 s = sum<1>(bg::detail::as_range<range_type>(geometry));
54 BOOST_CHECK_CLOSE(s, expected_y, 0.001);
55 }
56
57
58 template <typename P>
test_all()59 void test_all()
60 {
61 // As-range utility should consider a geometry as a range, so
62 // linestring stays linestring
63 test_geometry<bg::model::linestring<P> >("LINESTRING(1 2,3 4)", 4, 6);
64
65 // polygon will only be outer-ring
66 test_geometry<bg::model::polygon<P> >("POLYGON((1 2,3 4))", 4, 6);
67 test_geometry<bg::model::polygon<P> >("POLYGON((1 2,3 4),(5 6,7 8,9 10))", 4, 6);
68
69 // the utility is useful for:
70 // - convex hull (holes do not count)
71 // - envelope (idem)
72 }
73
test_main(int,char * [])74 int test_main(int, char* [])
75 {
76 test_all<bg::model::point<double, 2, bg::cs::cartesian> >();
77
78 return 0;
79 }
80