1<html> 2<head> 3<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 4<title>make (2 coordinate values)</title> 5<link rel="stylesheet" href="../../../../../../../../doc/src/boostbook.css" type="text/css"> 6<meta name="generator" content="DocBook XSL Stylesheets V1.79.1"> 7<link rel="home" href="../../../../index.html" title="Chapter 1. Geometry"> 8<link rel="up" href="../make.html" title="make"> 9<link rel="prev" href="../make.html" title="make"> 10<link rel="next" href="make_3_3_coordinate_values.html" title="make (3 coordinate values)"> 11</head> 12<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> 13<table cellpadding="2" width="100%"><tr> 14<td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../../../../../boost.png"></td> 15<td align="center"><a href="../../../../../../../../index.html">Home</a></td> 16<td align="center"><a href="../../../../../../../../libs/libraries.htm">Libraries</a></td> 17<td align="center"><a href="http://www.boost.org/users/people.html">People</a></td> 18<td align="center"><a href="http://www.boost.org/users/faq.html">FAQ</a></td> 19<td align="center"><a href="../../../../../../../../more/index.htm">More</a></td> 20</tr></table> 21<hr> 22<div class="spirit-nav"> 23<a accesskey="p" href="../make.html"><img src="../../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../make.html"><img src="../../../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../../../index.html"><img src="../../../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="make_3_3_coordinate_values.html"><img src="../../../../../../../../doc/src/images/next.png" alt="Next"></a> 24</div> 25<div class="section"> 26<div class="titlepage"><div><div><h5 class="title"> 27<a name="geometry.reference.algorithms.make.make_2_2_coordinate_values"></a><a class="link" href="make_2_2_coordinate_values.html" title="make (2 coordinate values)">make 28 (2 coordinate values)</a> 29</h5></div></div></div> 30<p> 31 <a class="indexterm" name="idm45635692362544"></a> 32Construct a geometry. 33 </p> 34<h6> 35<a name="geometry.reference.algorithms.make.make_2_2_coordinate_values.h0"></a> 36 <span class="phrase"><a name="geometry.reference.algorithms.make.make_2_2_coordinate_values.synopsis"></a></span><a class="link" href="make_2_2_coordinate_values.html#geometry.reference.algorithms.make.make_2_2_coordinate_values.synopsis">Synopsis</a> 37 </h6> 38<p> 39</p> 40<pre class="programlisting"><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> <span class="identifier">Geometry</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">Type</span><span class="special">></span> 41<span class="identifier">Geometry</span> <span class="identifier">make</span><span class="special">(</span><span class="identifier">Type</span> <span class="keyword">const</span> <span class="special">&</span> <span class="identifier">c1</span><span class="special">,</span> <span class="identifier">Type</span> <span class="keyword">const</span> <span class="special">&</span> <span class="identifier">c2</span><span class="special">)</span></pre> 42<p> 43 </p> 44<h6> 45<a name="geometry.reference.algorithms.make.make_2_2_coordinate_values.h1"></a> 46 <span class="phrase"><a name="geometry.reference.algorithms.make.make_2_2_coordinate_values.parameters"></a></span><a class="link" href="make_2_2_coordinate_values.html#geometry.reference.algorithms.make.make_2_2_coordinate_values.parameters">Parameters</a> 47 </h6> 48<div class="informaltable"><table class="table"> 49<colgroup> 50<col> 51<col> 52<col> 53<col> 54</colgroup> 55<thead><tr> 56<th> 57 <p> 58 Type 59 </p> 60 </th> 61<th> 62 <p> 63 Concept 64 </p> 65 </th> 66<th> 67 <p> 68 Name 69 </p> 70 </th> 71<th> 72 <p> 73 Description 74 </p> 75 </th> 76</tr></thead> 77<tbody> 78<tr> 79<td> 80 <p> 81 Geometry 82 </p> 83 </td> 84<td> 85 <p> 86 Any type fulfilling a Geometry Concept 87 </p> 88 </td> 89<td> 90 <p> 91 - 92 </p> 93 </td> 94<td> 95 <p> 96 Must be specified 97 </p> 98 </td> 99</tr> 100<tr> 101<td> 102 <p> 103 Type const & 104 </p> 105 </td> 106<td> 107 <p> 108 numerical type (int, double, ttmath, ...) to specify the coordinates 109 </p> 110 </td> 111<td> 112 <p> 113 c1 114 </p> 115 </td> 116<td> 117 <p> 118 First coordinate (usually x-coordinate) 119 </p> 120 </td> 121</tr> 122<tr> 123<td> 124 <p> 125 Type const & 126 </p> 127 </td> 128<td> 129 <p> 130 numerical type (int, double, ttmath, ...) to specify the coordinates 131 </p> 132 </td> 133<td> 134 <p> 135 c2 136 </p> 137 </td> 138<td> 139 <p> 140 Second coordinate (usually y-coordinate) 141 </p> 142 </td> 143</tr> 144</tbody> 145</table></div> 146<h6> 147<a name="geometry.reference.algorithms.make.make_2_2_coordinate_values.h2"></a> 148 <span class="phrase"><a name="geometry.reference.algorithms.make.make_2_2_coordinate_values.returns"></a></span><a class="link" href="make_2_2_coordinate_values.html#geometry.reference.algorithms.make.make_2_2_coordinate_values.returns">Returns</a> 149 </h6> 150<p> 151 The constructed geometry, here: a 2D point 152 </p> 153<h6> 154<a name="geometry.reference.algorithms.make.make_2_2_coordinate_values.h3"></a> 155 <span class="phrase"><a name="geometry.reference.algorithms.make.make_2_2_coordinate_values.header"></a></span><a class="link" href="make_2_2_coordinate_values.html#geometry.reference.algorithms.make.make_2_2_coordinate_values.header">Header</a> 156 </h6> 157<p> 158 Either 159 </p> 160<p> 161 <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">hpp</span><span class="special">></span></code> 162 </p> 163<p> 164 Or 165 </p> 166<p> 167 <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">algorithms</span><span class="special">/</span><span class="identifier">make</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span></code> 168 </p> 169<h6> 170<a name="geometry.reference.algorithms.make.make_2_2_coordinate_values.h4"></a> 171 <span class="phrase"><a name="geometry.reference.algorithms.make.make_2_2_coordinate_values.example"></a></span><a class="link" href="make_2_2_coordinate_values.html#geometry.reference.algorithms.make.make_2_2_coordinate_values.example">Example</a> 172 </h6> 173<p> 174 Shows the usage of make as a generic constructor for different point 175 types 176 </p> 177<p> 178</p> 179<pre class="programlisting"><span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">iostream</span><span class="special">></span> 180 181<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> 182<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">point_xy</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> 183<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="keyword">register</span><span class="special">/</span><span class="identifier">point</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> 184<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> 185<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_polygon</span><span class="special">/</span><span class="identifier">point</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> 186 187<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> 188 189<span class="keyword">struct</span> <span class="identifier">mypoint</span> <span class="special">{</span> <span class="keyword">float</span> <span class="identifier">_x</span><span class="special">,</span> <span class="identifier">_y</span><span class="special">;</span> <span class="special">};</span> 190 191<span class="identifier">BOOST_GEOMETRY_REGISTER_POINT_2D</span><span class="special">(</span><span class="identifier">mypoint</span><span class="special">,</span> <span class="keyword">float</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="identifier">_x</span><span class="special">,</span> <span class="identifier">_y</span><span class="special">)</span> 192 193<span class="keyword">template</span> <span class="special"><</span><span class="keyword">typename</span> <span class="identifier">Point</span><span class="special">></span> 194<span class="keyword">void</span> <span class="identifier">construct_and_display</span><span class="special">()</span> 195<span class="special">{</span> 196 <span class="keyword">using</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">geometry</span><span class="special">::</span><span class="identifier">make</span><span class="special">;</span> 197 <span class="keyword">using</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">geometry</span><span class="special">::</span><span class="identifier">get</span><span class="special">;</span> 198 199 <span class="identifier">Point</span> <span class="identifier">p</span> <span class="special">=</span> <span class="identifier">make</span><span class="special"><</span><span class="identifier">Point</span><span class="special">>(</span><span class="number">1</span><span class="special">,</span> <span class="number">2</span><span class="special">);</span> 200 201 <span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special"><<</span> <span class="string">"x="</span> <span class="special"><<</span> <span class="identifier">get</span><span class="special"><</span><span class="number">0</span><span class="special">>(</span><span class="identifier">p</span><span class="special">)</span> <span class="special"><<</span> <span class="string">" y="</span> <span class="special"><<</span> <span class="identifier">get</span><span class="special"><</span><span class="number">1</span><span class="special">>(</span><span class="identifier">p</span><span class="special">)</span> 202 <span class="special"><<</span> <span class="string">" ("</span> <span class="special"><<</span> <span class="keyword">typeid</span><span class="special">(</span><span class="identifier">Point</span><span class="special">).</span><span class="identifier">name</span><span class="special">()</span> <span class="special"><<</span> <span class="string">")"</span> 203 <span class="special"><<</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span> 204<span class="special">}</span> 205 206<span class="keyword">int</span> <span class="identifier">main</span><span class="special">()</span> 207<span class="special">{</span> 208 <span class="identifier">construct_and_display</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">d2</span><span class="special">::</span><span class="identifier">point_xy</span><span class="special"><</span><span class="keyword">double</span><span class="special">></span> <span class="special">>();</span> 209 <span class="identifier">construct_and_display</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">d2</span><span class="special">::</span><span class="identifier">point_xy</span><span class="special"><</span><span class="keyword">int</span><span class="special">></span> <span class="special">>();</span> 210 <span class="identifier">construct_and_display</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> 211 <span class="identifier">construct_and_display</span><span class="special"><</span><span class="identifier">boost</span><span class="special">::</span><span class="identifier">polygon</span><span class="special">::</span><span class="identifier">point_data</span><span class="special"><</span><span class="keyword">int</span><span class="special">></span> <span class="special">>();</span> 212 <span class="identifier">construct_and_display</span><span class="special"><</span><span class="identifier">mypoint</span><span class="special">>();</span> 213 <span class="keyword">return</span> <span class="number">0</span><span class="special">;</span> 214<span class="special">}</span> 215</pre> 216<p> 217 </p> 218<p> 219 Output (compiled using gcc): 220 </p> 221<pre class="programlisting">x=1 y=2 (N5boost8geometry5model2d28point_xyIdNS0_2cs9cartesianEEE) 222x=1 y=2 (N5boost8geometry5model2d28point_xyIiNS0_2cs9cartesianEEE) 223x=1 y=2 (N5boost6tuples5tupleIddNS0_9null_typeES2_S2_S2_S2_S2_S2_S2_EE) 224x=1 y=2 (N5boost7polygon10point_dataIiEE) 225x=1 y=2 (7mypoint) 226</pre> 227<h6> 228<a name="geometry.reference.algorithms.make.make_2_2_coordinate_values.h5"></a> 229 <span class="phrase"><a name="geometry.reference.algorithms.make.make_2_2_coordinate_values.see_also"></a></span><a class="link" href="make_2_2_coordinate_values.html#geometry.reference.algorithms.make.make_2_2_coordinate_values.see_also">See 230 also</a> 231 </h6> 232<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem"> 233 <a class="link" href="../assign/assign_values_3_2_coordinate_values.html" title="assign_values (2 coordinate values)">assign</a> 234 </li></ul></div> 235</div> 236<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> 237<td align="left"></td> 238<td align="right"><div class="copyright-footer">Copyright © 2009-2019 Barend Gehrels, Bruno Lalande, Mateusz Loskot, Adam 239 Wulkiewicz, Oracle and/or its affiliates<p> 240 Distributed under the Boost Software License, Version 1.0. (See accompanying 241 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>) 242 </p> 243</div></td> 244</tr></table> 245<hr> 246<div class="spirit-nav"> 247<a accesskey="p" href="../make.html"><img src="../../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../make.html"><img src="../../../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../../../index.html"><img src="../../../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="make_3_3_coordinate_values.html"><img src="../../../../../../../../doc/src/images/next.png" alt="Next"></a> 248</div> 249</body> 250</html> 251
