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26 <div class="titlepage"><div><div><h4 class="title">
27 <a name="geometry.reference.adapted.c_array"></a><a class="link" href="c_array.html" title="C array">C array</a>
28 </h4></div></div></div>
30 C arrays are adapted to the Boost.Geometry point concept
33 <a name="geometry.reference.adapted.c_array.h0"></a>
34 <span class="phrase"><a name="geometry.reference.adapted.c_array.description"></a></span><a class="link" href="c_array.html#geometry.reference.adapted.c_array.description">Description</a>
37 C arrays, such as double[2] or int[3], are (optionally) adapted to the
38 Boost.Geometry point concept. They can therefore be used in many Boost.Geometry
42 Note that a C array cannot be the point type of a linestring or a polygon.
43 The reason for that is that a std::vector does not allow containing C arrays
44 (this is not related to Boost.Geometry). The C array is therefore limited
48 <a name="geometry.reference.adapted.c_array.h1"></a>
49 <span class="phrase"><a name="geometry.reference.adapted.c_array.model_of"></a></span><a class="link" href="c_array.html#geometry.reference.adapted.c_array.model_of">Model
53 <a class="link" href="../concepts/concept_point.html" title="Point Concept">Point Concept</a>
56 <a name="geometry.reference.adapted.c_array.h2"></a>
57 <span class="phrase"><a name="geometry.reference.adapted.c_array.header"></a></span><a class="link" href="c_array.html#geometry.reference.adapted.c_array.header">Header</a>
60 <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">c_array</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span></code>
63 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>
64 does not include this header.
67 <a name="geometry.reference.adapted.c_array.h3"></a>
68 <span class="phrase"><a name="geometry.reference.adapted.c_array.example"></a></span><a class="link" href="c_array.html#geometry.reference.adapted.c_array.example">Example</a>
71 Small example showing the combination of an array with a Boost.Geometry
76 <pre class="programlisting"><span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">iostream</span><span class="special">></span>
77 <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>
78 <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">c_array</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span>
80 <span class="identifier">BOOST_GEOMETRY_REGISTER_C_ARRAY_CS</span><span class="special">(</span><span class="identifier">cs</span><span class="special">::</span><span class="identifier">cartesian</span><span class="special">)</span>
82 <span class="keyword">int</span> <span class="identifier">main</span><span class="special">()</span>
83 <span class="special">{</span>
84 <span class="keyword">int</span> <span class="identifier">a</span><span class="special">[</span><span class="number">3</span><span class="special">]</span> <span class="special">=</span> <span class="special">{</span><span class="number">1</span><span class="special">,</span> <span class="number">2</span><span class="special">,</span> <span class="number">3</span><span class="special">};</span>
85 <span class="keyword">int</span> <span class="identifier">b</span><span class="special">[</span><span class="number">3</span><span class="special">]</span> <span class="special">=</span> <span class="special">{</span><span class="number">2</span><span class="special">,</span> <span class="number">3</span><span class="special">,</span> <span class="number">4</span><span class="special">};</span>
87 <span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</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">distance</span><span class="special">(</span><span class="identifier">a</span><span class="special">,</span> <span class="identifier">b</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>
89 <span class="keyword">return</span> <span class="number">0</span><span class="special">;</span>
90 <span class="special">}</span>
97 <pre class="programlisting">1.73205
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