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<h1>boost/geometry/algorithms/overlaps.hpp</h1><a href="overlaps_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_OVERLAPS_HPP</span>
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<a name="l00010"></a>00010 <span class="preprocessor"></span><span class="preprocessor">#define BOOST_GEOMETRY_ALGORITHMS_OVERLAPS_HPP</span>
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<a name="l00011"></a>00011 <span class="preprocessor"></span>
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<a name="l00024"></a>00024 <span class="preprocessor">#include <<a class="code" href="access_8hpp.html">boost/geometry/core/access.hpp</a>></span>
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<a name="l00025"></a>00025
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<a name="l00026"></a>00026 <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="l00027"></a>00027
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<a name="l00028"></a>00028 <span class="keyword">namespace </span>boost { <span class="keyword">namespace </span>geometry
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<a name="l00029"></a>00029 {
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<a name="l00030"></a>00030
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<a name="l00031"></a>00031 <span class="preprocessor">#ifndef DOXYGEN_NO_DETAIL</span>
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<a name="l00032"></a>00032 <span class="preprocessor"></span><span class="keyword">namespace </span>detail { <span class="keyword">namespace </span><a class="code" href="group__overlaps.html#g8997503b86e1565f644ad0993d608caf" title="Determines overlap between two geometries.">overlaps</a> {
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<a name="l00033"></a>00033
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<a name="l00034"></a>00034 <span class="keyword">template</span>
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<a name="l00035"></a>00035 <
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<a name="l00036"></a>00036 <span class="keyword">typename</span> Box1,
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<a name="l00037"></a>00037 <span class="keyword">typename</span> Box2,
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<a name="l00038"></a>00038 std::size_t Dimension,
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<a name="l00039"></a>00039 std::size_t DimensionCount
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<a name="l00040"></a>00040 >
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<a name="l00041"></a>00041 <span class="keyword">struct </span>box_box_loop
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<a name="l00042"></a>00042 {
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<a name="l00043"></a>00043 <span class="keyword">static</span> <span class="keyword">inline</span> <span class="keywordtype">void</span> apply(Box1 <span class="keyword">const</span>& b1, Box2 <span class="keyword">const</span>& b2,
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<a name="l00044"></a>00044 <span class="keywordtype">bool</span>& <a class="code" href="group__overlaps.html#g8997503b86e1565f644ad0993d608caf" title="Determines overlap between two geometries.">overlaps</a>, <span class="keywordtype">bool</span>& one_in_two, <span class="keywordtype">bool</span>& two_in_one)
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<a name="l00045"></a>00045 {
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<a name="l00046"></a>00046 assert_dimension_equal<Box1, Box2>();
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<a name="l00047"></a>00047
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<a name="l00048"></a>00048 <span class="keyword">typedef</span> <span class="keyword">typename</span> coordinate_type<Box1>::type coordinate_type1;
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<a name="l00049"></a>00049 <span class="keyword">typedef</span> <span class="keyword">typename</span> coordinate_type<Box2>::type coordinate_type2;
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<a name="l00050"></a>00050
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<a name="l00051"></a>00051 coordinate_type1 <span class="keyword">const</span>& min1 = get<min_corner, Dimension>(b1);
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<a name="l00052"></a>00052 coordinate_type1 <span class="keyword">const</span>& max1 = get<max_corner, Dimension>(b1);
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<a name="l00053"></a>00053 coordinate_type2 <span class="keyword">const</span>& min2 = get<min_corner, Dimension>(b2);
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<a name="l00054"></a>00054 coordinate_type2 <span class="keyword">const</span>& max2 = get<max_corner, Dimension>(b2);
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<a name="l00055"></a>00055
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<a name="l00056"></a>00056 <span class="comment">// We might use the (not yet accepted) Boost.Interval</span>
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<a name="l00057"></a>00057 <span class="comment">// submission in the future</span>
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<a name="l00058"></a>00058
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<a name="l00059"></a>00059 <span class="comment">// If:</span>
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<a name="l00060"></a>00060 <span class="comment">// B1: |-------|</span>
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<a name="l00061"></a>00061 <span class="comment">// B2: |------|</span>
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<a name="l00062"></a>00062 <span class="comment">// in any dimension -> no overlap</span>
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<a name="l00063"></a>00063 <span class="keywordflow">if</span> (max1 <= min2 || min1 >= max2)
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<a name="l00064"></a>00064 {
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<a name="l00065"></a>00065 overlaps = <span class="keyword">false</span>;
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<a name="l00066"></a>00066 <span class="keywordflow">return</span>;
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<a name="l00067"></a>00067 }
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<a name="l00068"></a>00068
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<a name="l00069"></a>00069 <span class="comment">// If:</span>
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<a name="l00070"></a>00070 <span class="comment">// B1: |--------------------|</span>
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<a name="l00071"></a>00071 <span class="comment">// B2: |-------------|</span>
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<a name="l00072"></a>00072 <span class="comment">// in all dimensions -> within, then no overlap</span>
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<a name="l00073"></a>00073 <span class="comment">// B1: |--------------------|</span>
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<a name="l00074"></a>00074 <span class="comment">// B2: |-------------|</span>
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<a name="l00075"></a>00075 <span class="comment">// this is "within-touch" -> then no overlap. So use < and ></span>
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<a name="l00076"></a>00076 <span class="keywordflow">if</span> (min1 < min2 || max1 > max2)
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<a name="l00077"></a>00077 {
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<a name="l00078"></a>00078 one_in_two = <span class="keyword">false</span>;
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<a name="l00079"></a>00079 }
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<a name="l00080"></a>00080 <span class="comment">// Same other way round</span>
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<a name="l00081"></a>00081 <span class="keywordflow">if</span> (min2 < min1 || max2 > max1)
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<a name="l00082"></a>00082 {
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<a name="l00083"></a>00083 two_in_one = <span class="keyword">false</span>;
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<a name="l00084"></a>00084 }
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<a name="l00085"></a>00085
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<a name="l00086"></a>00086 box_box_loop
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<a name="l00087"></a>00087 <
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<a name="l00088"></a>00088 Box1,
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<a name="l00089"></a>00089 Box2,
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<a name="l00090"></a>00090 Dimension + 1,
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<a name="l00091"></a>00091 DimensionCount
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<a name="l00092"></a>00092 >::apply(b1, b2, overlaps, one_in_two, two_in_one);
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<a name="l00093"></a>00093 }
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<a name="l00094"></a>00094 };
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<a name="l00095"></a>00095
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<a name="l00096"></a>00096 <span class="keyword">template</span>
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||
<a name="l00097"></a>00097 <
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<a name="l00098"></a>00098 <span class="keyword">typename</span> Box1,
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||
<a name="l00099"></a>00099 <span class="keyword">typename</span> Box2,
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<a name="l00100"></a>00100 std::size_t DimensionCount
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<a name="l00101"></a>00101 >
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<a name="l00102"></a>00102 <span class="keyword">struct </span>box_box_loop<Box1, Box2, DimensionCount, DimensionCount>
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<a name="l00103"></a>00103 {
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<a name="l00104"></a>00104 <span class="keyword">static</span> <span class="keyword">inline</span> <span class="keywordtype">void</span> apply(Box1 <span class="keyword">const</span>& , Box2 <span class="keyword">const</span>&, <span class="keywordtype">bool</span>&, <span class="keywordtype">bool</span>&, <span class="keywordtype">bool</span>&)
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<a name="l00105"></a>00105 {
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<a name="l00106"></a>00106 }
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<a name="l00107"></a>00107 };
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<a name="l00108"></a>00108
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||
<a name="l00109"></a>00109 <span class="keyword">template</span>
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||
<a name="l00110"></a>00110 <
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||
<a name="l00111"></a>00111 <span class="keyword">typename</span> Box1,
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<a name="l00112"></a>00112 <span class="keyword">typename</span> Box2
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<a name="l00113"></a>00113 >
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<a name="l00114"></a>00114 <span class="keyword">struct </span>box_box
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<a name="l00115"></a>00115 {
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<a name="l00116"></a>00116 <span class="keyword">static</span> <span class="keyword">inline</span> <span class="keywordtype">bool</span> apply(Box1 <span class="keyword">const</span>& b1, Box2 <span class="keyword">const</span>& b2)
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<a name="l00117"></a>00117 {
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<a name="l00118"></a>00118 <span class="keywordtype">bool</span> overlaps = <span class="keyword">true</span>;
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<a name="l00119"></a>00119 <span class="keywordtype">bool</span> within1 = <span class="keyword">true</span>;
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<a name="l00120"></a>00120 <span class="keywordtype">bool</span> within2 = <span class="keyword">true</span>;
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<a name="l00121"></a>00121 box_box_loop
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<a name="l00122"></a>00122 <
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||
<a name="l00123"></a>00123 Box1,
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||
<a name="l00124"></a>00124 Box2,
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||
<a name="l00125"></a>00125 0,
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<a name="l00126"></a>00126 <a class="code" href="classcore__dispatch_1_1dimension.html">dimension<Box1>::type::value</a>
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<a name="l00127"></a>00127 >::apply(b1, b2, overlaps, within1, within2);
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<a name="l00128"></a>00128
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<a name="l00129"></a>00129 <span class="comment">/*</span>
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<a name="l00130"></a>00130 <span class="comment"> \see http://docs.codehaus.org/display/GEOTDOC/02+Geometry+Relationships#02GeometryRelationships-Overlaps</span>
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<a name="l00131"></a>00131 <span class="comment"> where is stated that "inside" is not an "overlap",</span>
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<a name="l00132"></a>00132 <span class="comment"> this is true and is implemented as such.</span>
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<a name="l00133"></a>00133 <span class="comment"> */</span>
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<a name="l00134"></a>00134 <span class="keywordflow">return</span> overlaps && ! within1 && ! within2;
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<a name="l00135"></a>00135 }
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<a name="l00136"></a>00136 };
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<a name="l00137"></a>00137
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<a name="l00138"></a>00138
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<a name="l00139"></a>00139
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<a name="l00140"></a>00140 }} <span class="comment">// namespace detail::overlaps</span>
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<a name="l00141"></a>00141 <span class="preprocessor">#endif // DOXYGEN_NO_DETAIL</span>
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<a name="l00142"></a>00142 <span class="preprocessor"></span>
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||
<a name="l00143"></a>00143
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||
<a name="l00144"></a>00144 <span class="preprocessor">#ifndef DOXYGEN_NO_DISPATCH</span>
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<a name="l00145"></a>00145 <span class="preprocessor"></span><span class="keyword">namespace </span>dispatch
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||
<a name="l00146"></a>00146 {
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<a name="l00147"></a>00147
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||
<a name="l00148"></a>00148 <span class="keyword">template</span>
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||
<a name="l00149"></a>00149 <
|
||
<a name="l00150"></a>00150 <span class="keyword">typename</span> Tag1,
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||
<a name="l00151"></a>00151 <span class="keyword">typename</span> Tag2,
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||
<a name="l00152"></a>00152 <span class="keyword">typename</span> Geometry1,
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<a name="l00153"></a>00153 <span class="keyword">typename</span> Geometry2
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<a name="l00154"></a>00154 >
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<a name="l00155"></a>00155 <span class="keyword">struct </span><a class="code" href="group__overlaps.html#g8997503b86e1565f644ad0993d608caf" title="Determines overlap between two geometries.">overlaps</a>
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<a name="l00156"></a>00156 {};
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<a name="l00157"></a>00157
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<a name="l00158"></a>00158
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<a name="l00159"></a>00159 <span class="keyword">template</span> <<span class="keyword">typename</span> Box1, <span class="keyword">typename</span> Box2>
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<a name="l00160"></a>00160 <span class="keyword">struct </span><a class="code" href="group__overlaps.html#g8997503b86e1565f644ad0993d608caf" title="Determines overlap between two geometries.">overlaps</a><box_tag, box_tag, Box1, Box2>
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<a name="l00161"></a>00161 : detail::<a class="code" href="group__overlaps.html#g8997503b86e1565f644ad0993d608caf" title="Determines overlap between two geometries.">overlaps</a>::box_box<Box1, Box2>
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<a name="l00162"></a>00162 {};
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<a name="l00163"></a>00163
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<a name="l00164"></a>00164
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<a name="l00165"></a>00165
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<a name="l00166"></a>00166
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<a name="l00167"></a>00167 } <span class="comment">// namespace dispatch</span>
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<a name="l00168"></a>00168 <span class="preprocessor">#endif // DOXYGEN_NO_DISPATCH</span>
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||
<a name="l00169"></a>00169 <span class="preprocessor"></span>
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<a name="l00170"></a>00170
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<a name="l00176"></a>00176 <span class="keyword">template</span> <<span class="keyword">typename</span> Geometry1, <span class="keyword">typename</span> Geometry2>
|
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<a name="l00177"></a><a class="code" href="group__overlaps.html#g8997503b86e1565f644ad0993d608caf">00177</a> <span class="keyword">inline</span> <span class="keywordtype">bool</span> <a class="code" href="group__overlaps.html#g8997503b86e1565f644ad0993d608caf" title="Determines overlap between two geometries.">overlaps</a>(Geometry1 <span class="keyword">const</span>& geometry1, Geometry2 <span class="keyword">const</span>& geometry2)
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<a name="l00178"></a>00178 {
|
||
<a name="l00179"></a>00179 concept::check<const Geometry1>();
|
||
<a name="l00180"></a>00180 concept::check<const Geometry2>();
|
||
<a name="l00181"></a>00181
|
||
<a name="l00182"></a>00182 <span class="keywordflow">return</span> <a class="code" href="group__overlaps.html#g8997503b86e1565f644ad0993d608caf" title="Determines overlap between two geometries.">dispatch::overlaps</a>
|
||
<a name="l00183"></a>00183 <
|
||
<a name="l00184"></a>00184 <span class="keyword">typename</span> <a class="code" href="structboost_1_1geometry_1_1geometry__not__recognized__tag.html" title="&quot;default&quot; tag">tag<Geometry1>::type</a>,
|
||
<a name="l00185"></a>00185 <span class="keyword">typename</span> <a class="code" href="structboost_1_1geometry_1_1geometry__not__recognized__tag.html" title="&quot;default&quot; tag">tag<Geometry2>::type</a>,
|
||
<a name="l00186"></a>00186 Geometry1,
|
||
<a name="l00187"></a>00187 Geometry2
|
||
<a name="l00188"></a>00188 >::apply(geometry1, geometry2);
|
||
<a name="l00189"></a>00189 }
|
||
<a name="l00190"></a>00190
|
||
<a name="l00191"></a>00191 }} <span class="comment">// namespace boost::geometry</span>
|
||
<a name="l00192"></a>00192
|
||
<a name="l00193"></a>00193 <span class="preprocessor">#endif // BOOST_GEOMETRY_ALGORITHMS_OVERLAPS_HPP</span>
|
||
</pre></div></div>
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<hr size="1">
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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>
|
||
Copyright <20> 2008-2009 Bruno Lalande, Paris<br>
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Copyright <20> 2009 Mateusz Loskot, Cadcorp, London<br>
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</small>
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</td>
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</tr>
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</tbody>
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</table>
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<address style="text-align: right;"><small>
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Documentation is generated by <a href="http://www.doxygen.org/index.html">Doxygen</a>
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