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| <div class="titlepage"><div><div><h4 class="title"> |
| <a name="geometry.reference.adapted.boost_tuple"></a><a class="link" href="boost_tuple.html" title="Boost.Tuple">Boost.Tuple</a> |
| </h4></div></div></div> |
| <p> |
| Boost.Tuple tuples with arithmetic elements can be used as points within |
| Boost.Geometry |
| </p> |
| <a name="geometry.reference.adapted.boost_tuple.description"></a><h6> |
| <a name="geometry.reference.adapted.boost_tuple.description-heading"></a> |
| <a class="link" href="boost_tuple.html#geometry.reference.adapted.boost_tuple.description">Description</a> |
| </h6> |
| <p> |
| Boost.Tuple fixed sized collections, such as boost::tuple<double, double>, |
| are (optionally) adapted to the Boost.Geometry point concept. |
| </p> |
| <p> |
| Boost.Tuple pairs or triples might have mutually different types, such |
| as a boost::tuple<float, double>. Boost.Geometry reports the first |
| type as its <a class="link" href="../core/coordinate_type.html" title="coordinate_type">coordinate_type</a>. |
| </p> |
| <p> |
| Boost.Geometry supports Boost.Tuple pairs, triples, quadruples, etc up |
| to tuples with 10 elements (though most algorithms do not support so many |
| dimensions). |
| </p> |
| <p> |
| A tuple can be the point type used by the models linestring, polygon, segment, |
| box, and ring |
| </p> |
| <a name="geometry.reference.adapted.boost_tuple.model_of"></a><h6> |
| <a name="geometry.reference.adapted.boost_tuple.model_of-heading"></a> |
| <a class="link" href="boost_tuple.html#geometry.reference.adapted.boost_tuple.model_of">Model of</a> |
| </h6> |
| <p> |
| <a class="link" href="../concepts/concept_point.html" title="Point Concept">Point Concept</a> |
| </p> |
| <a name="geometry.reference.adapted.boost_tuple.header"></a><h6> |
| <a name="geometry.reference.adapted.boost_tuple.header-heading"></a> |
| <a class="link" href="boost_tuple.html#geometry.reference.adapted.boost_tuple.header">Header</a> |
| </h6> |
| <p> |
| <code class="computeroutput"><span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">geometry</span><span class="special">/</span><span class="identifier">geometries</span><span class="special">/</span><span class="identifier">adapted</span><span class="special">/</span><span class="identifier">boost_tuple</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span></code> |
| </p> |
| <p> |
| The standard header <code class="computeroutput"><span class="identifier">boost</span><span class="special">/</span><span class="identifier">geometry</span><span class="special">.</span><span class="identifier">hpp</span></code> |
| does not include this header. |
| </p> |
| <a name="geometry.reference.adapted.boost_tuple.example"></a><h6> |
| <a name="geometry.reference.adapted.boost_tuple.example-heading"></a> |
| <a class="link" href="boost_tuple.html#geometry.reference.adapted.boost_tuple.example">Example</a> |
| </h6> |
| <p> |
| Shows how to use Boost.Tuple points in Boost.Geometry |
| </p> |
| <p> |
| Working with Boost.Tuples in Boost.Geometry is straightforward and shown |
| in various other examples as well. |
| </p> |
| <p> |
| |
| </p> |
| <pre class="programlisting"><span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">iostream</span><span class="special">></span> |
| |
| <span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">geometry</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> |
| <span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">geometry</span><span class="special">/</span><span class="identifier">geometries</span><span class="special">/</span><span class="identifier">polygon</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> |
| <span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">geometry</span><span class="special">/</span><span class="identifier">geometries</span><span class="special">/</span><span class="identifier">adapted</span><span class="special">/</span><span class="identifier">boost_tuple</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> |
| |
| <span class="identifier">BOOST_GEOMETRY_REGISTER_BOOST_TUPLE_CS</span><span class="special">(</span><span class="identifier">cs</span><span class="special">::</span><span class="identifier">cartesian</span><span class="special">)</span> |
| |
| <span class="keyword">int</span> <span class="identifier">main</span><span class="special">()</span> |
| <span class="special">{</span> |
| <span class="identifier">boost</span><span class="special">::</span><span class="identifier">geometry</span><span class="special">::</span><span class="identifier">model</span><span class="special">::</span><span class="identifier">polygon</span><span class="special"><</span><span class="identifier">boost</span><span class="special">::</span><span class="identifier">tuple</span><span class="special"><</span><span class="keyword">double</span><span class="special">,</span> <span class="keyword">double</span><span class="special">></span> <span class="special">></span> <span class="identifier">poly</span><span class="special">;</span> |
| <span class="identifier">poly</span><span class="special">.</span><span class="identifier">outer</span><span class="special">().</span><span class="identifier">push_back</span><span class="special">(</span><span class="identifier">boost</span><span class="special">::</span><span class="identifier">make_tuple</span><span class="special">(</span><span class="number">1.0</span><span class="special">,</span> <span class="number">2.0</span><span class="special">));</span> |
| <span class="identifier">poly</span><span class="special">.</span><span class="identifier">outer</span><span class="special">().</span><span class="identifier">push_back</span><span class="special">(</span><span class="identifier">boost</span><span class="special">::</span><span class="identifier">make_tuple</span><span class="special">(</span><span class="number">6.0</span><span class="special">,</span> <span class="number">4.0</span><span class="special">));</span> |
| <span class="identifier">poly</span><span class="special">.</span><span class="identifier">outer</span><span class="special">().</span><span class="identifier">push_back</span><span class="special">(</span><span class="identifier">boost</span><span class="special">::</span><span class="identifier">make_tuple</span><span class="special">(</span><span class="number">5.0</span><span class="special">,</span> <span class="number">1.0</span><span class="special">));</span> |
| <span class="identifier">poly</span><span class="special">.</span><span class="identifier">outer</span><span class="special">().</span><span class="identifier">push_back</span><span class="special">(</span><span class="identifier">boost</span><span class="special">::</span><span class="identifier">make_tuple</span><span class="special">(</span><span class="number">1.0</span><span class="special">,</span> <span class="number">2.0</span><span class="special">));</span> |
| |
| <span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special"><<</span> <span class="string">"Area: "</span> <span class="special"><<</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">geometry</span><span class="special">::</span><span class="identifier">area</span><span class="special">(</span><span class="identifier">poly</span><span class="special">)</span> <span class="special"><<</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span> |
| <span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special"><<</span> <span class="string">"Contains (1.5, 2.5): "</span> |
| <span class="special"><<</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">boolalpha</span> |
| <span class="special"><<</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">geometry</span><span class="special">::</span><span class="identifier">within</span><span class="special">(</span><span class="identifier">boost</span><span class="special">::</span><span class="identifier">make_tuple</span><span class="special">(</span><span class="number">1.5</span><span class="special">,</span> <span class="number">2.5</span><span class="special">),</span> <span class="identifier">poly</span><span class="special">)</span> |
| <span class="special"><<</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span> |
| |
| <span class="keyword">return</span> <span class="number">0</span><span class="special">;</span> |
| <span class="special">}</span> |
| |
| </pre> |
| <p> |
| </p> |
| <p> |
| Output: |
| </p> |
| <pre class="programlisting">Area: 6.5 |
| Contains (1.5, 2.5): false |
| </pre> |
| </div> |
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| <td align="left"></td> |
| <td align="right"><div class="copyright-footer">Copyright © 2011 Barend Gehrels, Bruno Lalande, Mateusz Loskot<p> |
| Distributed under the Boost Software License, Version 1.0. (See accompanying |
| file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>) |
| </p> |
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