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<h1>boost/geometry/algorithms/intermediate.hpp</h1><a href="intermediate_8hpp.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">// Boost.Geometry (aka GGL, Generic Geometry Library)</span>
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<a name="l00002"></a>00002 <span class="comment">//</span>
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<a name="l00003"></a>00003 <span class="comment">// Copyright Barend Gehrels 2007-2009, Geodan, Amsterdam, the Netherlands.</span>
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<a name="l00004"></a>00004 <span class="comment">// Copyright Bruno Lalande 2008, 2009</span>
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<a name="l00005"></a>00005 <span class="comment">// Use, modification and distribution is subject to the Boost Software License,</span>
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<a name="l00006"></a>00006 <span class="comment">// Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at</span>
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<a name="l00007"></a>00007 <span class="comment">// http://www.boost.org/LICENSE_1_0.txt)</span>
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<a name="l00008"></a>00008
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<a name="l00009"></a>00009 <span class="preprocessor">#ifndef BOOST_GEOMETRY_ALGORITHMS_INTERMEDIATE_HPP</span>
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<a name="l00010"></a>00010 <span class="preprocessor"></span><span class="preprocessor">#define BOOST_GEOMETRY_ALGORITHMS_INTERMEDIATE_HPP</span>
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<a name="l00011"></a>00011 <span class="preprocessor"></span>
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<a name="l00012"></a>00012 <span class="preprocessor">#include <cstddef></span>
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<a name="l00013"></a>00013 <span class="preprocessor">#include <iterator></span>
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<a name="l00014"></a>00014
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<a name="l00015"></a>00015 <span class="preprocessor">#include <boost/range/functions.hpp></span>
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<a name="l00016"></a>00016 <span class="preprocessor">#include <boost/range/metafunctions.hpp></span>
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<a name="l00017"></a>00017
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<a name="l00018"></a>00018 <span class="preprocessor">#include <<a class="code" href="cs_8hpp.html">boost/geometry/core/cs.hpp</a>></span>
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<a name="l00019"></a>00019 <span class="preprocessor">#include <<a class="code" href="geometries_2concepts_2check_8hpp.html">boost/geometry/geometries/concepts/check.hpp</a>></span>
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<a name="l00020"></a>00020
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<a name="l00029"></a>00029 <span class="keyword">namespace </span>boost { <span class="keyword">namespace </span>geometry
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<a name="l00030"></a>00030 {
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<a name="l00031"></a>00031
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<a name="l00032"></a>00032 <span class="preprocessor">#ifndef DOXYGEN_NO_DETAIL</span>
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<a name="l00033"></a>00033 <span class="preprocessor"></span><span class="keyword">namespace </span>detail { <span class="keyword">namespace </span><a class="code" href="group__intermediate.html#g3a65d18cfa537ebb381a2b435811c48c" title="Calculate intermediate of a geometry.">intermediate</a> {
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<a name="l00034"></a>00034
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<a name="l00035"></a>00035 <span class="keyword">template</span> <<span class="keyword">typename</span> Src, <span class="keyword">typename</span> Dst, std::<span class="keywordtype">size_t</span> Dimension, std::<span class="keywordtype">size_t</span> DimensionCount>
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<a name="l00036"></a>00036 <span class="keyword">struct </span>calculate_coordinate
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<a name="l00037"></a>00037 {
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<a name="l00038"></a>00038 <span class="keyword">static</span> <span class="keyword">inline</span> <span class="keywordtype">void</span> apply(Src <span class="keyword">const</span>& p1, Src <span class="keyword">const</span>& p2, Dst& p)
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<a name="l00039"></a>00039 {
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<a name="l00040"></a>00040 geometry::set<Dimension>(p,
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<a name="l00041"></a>00041 (geometry::get<Dimension>(p1) + geometry::get<Dimension>(p2)) / 2.0);
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<a name="l00042"></a>00042 calculate_coordinate<Src, Dst, Dimension + 1, DimensionCount>::apply(p1, p2, p);
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<a name="l00043"></a>00043 }
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<a name="l00044"></a>00044 };
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<a name="l00045"></a>00045
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<a name="l00046"></a>00046 <span class="keyword">template</span> <<span class="keyword">typename</span> Src, <span class="keyword">typename</span> Dst, std::<span class="keywordtype">size_t</span> DimensionCount>
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<a name="l00047"></a>00047 <span class="keyword">struct </span>calculate_coordinate<Src, Dst, DimensionCount, DimensionCount>
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<a name="l00048"></a>00048 {
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<a name="l00049"></a>00049 <span class="keyword">static</span> <span class="keyword">inline</span> <span class="keywordtype">void</span> apply(Src <span class="keyword">const</span>&, Src <span class="keyword">const</span>&, Dst&)
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<a name="l00050"></a>00050 {
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<a name="l00051"></a>00051 }
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<a name="l00052"></a>00052 };
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<a name="l00053"></a>00053
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<a name="l00054"></a>00054 <span class="keyword">template</span><<span class="keyword">typename</span> Range, <span class="keyword">typename</span> Iterator>
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<a name="l00055"></a>00055 <span class="keyword">struct </span>range_intermediate
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<a name="l00056"></a>00056 {
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<a name="l00057"></a>00057 <span class="keyword">static</span> <span class="keyword">inline</span> <span class="keywordtype">void</span> apply(Range <span class="keyword">const</span>& range,
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<a name="l00058"></a>00058 <span class="keywordtype">bool</span> start_and_end, Iterator out)
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<a name="l00059"></a>00059 {
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<a name="l00060"></a>00060 <span class="keyword">typedef</span> <span class="keyword">typename</span> point_type<Range>::type point_type;
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<a name="l00061"></a>00061 <span class="keyword">typedef</span> <span class="keyword">typename</span> boost::range_const_iterator<Range>::type iterator_type;
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<a name="l00062"></a>00062
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<a name="l00063"></a>00063 iterator_type it = boost::begin(range);
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<a name="l00064"></a>00064
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<a name="l00065"></a>00065 <span class="keywordflow">if</span> (start_and_end)
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<a name="l00066"></a>00066 {
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<a name="l00067"></a>00067 *out++ = *it;
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<a name="l00068"></a>00068 }
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<a name="l00069"></a>00069
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<a name="l00070"></a>00070 iterator_type prev = it++;
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<a name="l00071"></a>00071 <span class="keywordflow">for</span> (; it != boost::end(range); prev = it++)
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<a name="l00072"></a>00072 {
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<a name="l00073"></a>00073 point_type p;
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<a name="l00074"></a>00074 calculate_coordinate
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<a name="l00075"></a>00075 <
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<a name="l00076"></a>00076 point_type,
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<a name="l00077"></a>00077 point_type,
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<a name="l00078"></a>00078 0,
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<a name="l00079"></a>00079 <a class="code" href="classcore__dispatch_1_1dimension.html">dimension<point_type>::type::value</a>
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<a name="l00080"></a>00080 >::apply(*prev, *it, p);
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<a name="l00081"></a>00081 *out++ = p;
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<a name="l00082"></a>00082 }
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<a name="l00083"></a>00083
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<a name="l00084"></a>00084 <span class="keywordflow">if</span> (start_and_end)
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<a name="l00085"></a>00085 {
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<a name="l00086"></a>00086 *out++ = *prev;
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<a name="l00087"></a>00087 }
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<a name="l00088"></a>00088 }
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<a name="l00089"></a>00089 };
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<a name="l00090"></a>00090
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<a name="l00091"></a>00091 }} <span class="comment">// namespace detail::intermediate</span>
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<a name="l00092"></a>00092 <span class="preprocessor">#endif // DOXYGEN_NO_DETAIL</span>
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<a name="l00093"></a>00093 <span class="preprocessor"></span>
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<a name="l00094"></a>00094
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<a name="l00095"></a>00095 <span class="preprocessor">#ifndef DOXYGEN_NO_DISPATCH</span>
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<a name="l00096"></a>00096 <span class="preprocessor"></span><span class="keyword">namespace </span>dispatch
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<a name="l00097"></a>00097 {
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<a name="l00098"></a>00098
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<a name="l00099"></a>00099 <span class="keyword">template</span> <<span class="keyword">typename</span> GeometryTag, <span class="keyword">typename</span> G, <span class="keyword">typename</span> Iterator>
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<a name="l00100"></a>00100 <span class="keyword">struct </span><a class="code" href="group__intermediate.html#g3a65d18cfa537ebb381a2b435811c48c" title="Calculate intermediate of a geometry.">intermediate</a> {};
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<a name="l00101"></a>00101
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<a name="l00102"></a>00102 <span class="keyword">template</span> <<span class="keyword">typename</span> G, <span class="keyword">typename</span> Iterator>
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<a name="l00103"></a>00103 <span class="keyword">struct </span><a class="code" href="group__intermediate.html#g3a65d18cfa537ebb381a2b435811c48c" title="Calculate intermediate of a geometry.">intermediate</a><ring_tag, G, Iterator>
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<a name="l00104"></a>00104 : detail::<a class="code" href="group__intermediate.html#g3a65d18cfa537ebb381a2b435811c48c" title="Calculate intermediate of a geometry.">intermediate</a>::range_intermediate<G, Iterator> {};
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<a name="l00105"></a>00105
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<a name="l00106"></a>00106 <span class="keyword">template</span> <<span class="keyword">typename</span> G, <span class="keyword">typename</span> Iterator>
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<a name="l00107"></a>00107 <span class="keyword">struct </span><a class="code" href="group__intermediate.html#g3a65d18cfa537ebb381a2b435811c48c" title="Calculate intermediate of a geometry.">intermediate</a><linestring_tag, G, Iterator>
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<a name="l00108"></a>00108 : detail::<a class="code" href="group__intermediate.html#g3a65d18cfa537ebb381a2b435811c48c" title="Calculate intermediate of a geometry.">intermediate</a>::range_intermediate<G, Iterator> {};
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<a name="l00109"></a>00109
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<a name="l00110"></a>00110 } <span class="comment">// namespace dispatch</span>
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<a name="l00111"></a>00111 <span class="preprocessor">#endif // DOXYGEN_NO_DISPATCH</span>
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<a name="l00112"></a>00112 <span class="preprocessor"></span>
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<a name="l00113"></a>00113
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<a name="l00118"></a>00118 <span class="keyword">template</span><<span class="keyword">typename</span> Geometry, <span class="keyword">typename</span> Iterator>
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<a name="l00119"></a><a class="code" href="group__intermediate.html#g3a65d18cfa537ebb381a2b435811c48c">00119</a> <span class="keyword">inline</span> <span class="keywordtype">void</span> <a class="code" href="group__intermediate.html#g3a65d18cfa537ebb381a2b435811c48c" title="Calculate intermediate of a geometry.">intermediate</a>(Geometry <span class="keyword">const</span>& geometry,
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<a name="l00120"></a>00120 <span class="keywordtype">bool</span> start_and_end, Iterator out)
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<a name="l00121"></a>00121 {
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<a name="l00122"></a>00122 concept::check<const Geometry>();
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<a name="l00123"></a>00123
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<a name="l00124"></a>00124 <a class="code" href="group__intermediate.html#g3a65d18cfa537ebb381a2b435811c48c" title="Calculate intermediate of a geometry.">dispatch::intermediate</a>
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<a name="l00125"></a>00125 <
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<a name="l00126"></a>00126 <span class="keyword">typename</span> <a class="code" href="structboost_1_1geometry_1_1geometry__not__recognized__tag.html" title="&quot;default&quot; tag">tag<Geometry>::type</a>,
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<a name="l00127"></a>00127 Geometry,
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<a name="l00128"></a>00128 Iterator
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<a name="l00129"></a>00129 >::apply(geometry, start_and_end, out);
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<a name="l00130"></a>00130 }
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<a name="l00131"></a>00131
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<a name="l00132"></a>00132 }} <span class="comment">// namespace boost::geometry</span>
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<a name="l00133"></a>00133
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<a name="l00134"></a>00134 <span class="preprocessor">#endif // BOOST_GEOMETRY_ALGORITHMS_INTERMEDIATE_HPP</span>
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</pre></div></div>
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<td align="left"><small>
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<p>December 1, 2009</p>
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</small></td>
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<td align="right">
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<small>Copyright <20> 1995-2009 Barend Gehrels, Geodan, Amsterdam<br>
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Copyright <20> 2008-2009 Bruno Lalande, Paris<br>
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Copyright <20> 2009 Mateusz Loskot, Cadcorp, London<br>
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