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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/> <meta http-equiv="X-UA-Compatible" content="IE=9"/> <meta name="generator" content="Doxygen 1.8.5"/> <title>GEOS: Centroid.h Source File</title> <link href="tabs.css" rel="stylesheet" type="text/css"/> <script type="text/javascript" src="jquery.js"></script> <script type="text/javascript" src="dynsections.js"></script> <link href="doxygen.css" rel="stylesheet" type="text/css" /> </head> <body> <div id="top"><!-- do not remove this div, it is closed by doxygen! --> <div id="titlearea"> <table cellspacing="0" cellpadding="0"> <tbody> <tr style="height: 56px;"> <td style="padding-left: 0.5em;"> <div id="projectname">GEOS  <span id="projectnumber">3.5.0</span> </div> </td> </tr> </tbody> </table> </div> <!-- end header part --> <!-- Generated by Doxygen 1.8.5 --> <div id="navrow1" class="tabs"> <ul class="tablist"> <li><a href="index.html"><span>Main Page</span></a></li> <li><a href="pages.html"><span>Related Pages</span></a></li> <li><a href="namespaces.html"><span>Namespaces</span></a></li> <li><a href="annotated.html"><span>Classes</span></a></li> <li class="current"><a href="files.html"><span>Files</span></a></li> </ul> </div> <div id="navrow2" class="tabs2"> <ul class="tablist"> <li><a href="files.html"><span>File List</span></a></li> </ul> </div> <div id="nav-path" class="navpath"> <ul> <li class="navelem"><a class="el" href="dir_78009f08da3e03d86b70776dcc463e92.html">include</a></li><li class="navelem"><a class="el" href="dir_40c9e98f0599f998dfc16f8b0ec4bf37.html">geos</a></li><li class="navelem"><a class="el" href="dir_82cc1b1ae4439b803b1c9ab317873c7b.html">algorithm</a></li> </ul> </div> </div><!-- top --> <div class="header"> <div class="headertitle"> <div class="title">Centroid.h</div> </div> </div><!--header--> <div class="contents"> <div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">/**********************************************************************</span></div> <div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment"> *</span></div> <div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> * GEOS - Geometry Engine Open Source</span></div> <div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> * http://geos.osgeo.org</span></div> <div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"> *</span></div> <div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> * Copyright (C) 2013 Sandro Santilli <strk@keybit.net></span></div> <div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> *</span></div> <div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> * This is free software; you can redistribute and/or modify it under</span></div> <div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment"> * the terms of the GNU Lesser General Public Licence as published</span></div> <div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"> * by the Free Software Foundation. </span></div> <div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"> * See the COPYING file for more information.</span></div> <div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"> *</span></div> <div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment"> **********************************************************************</span></div> <div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment"> *</span></div> <div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment"> * Last port: algorithm/Centroid.java r728 (JTS-0.13+)</span></div> <div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment"> *</span></div> <div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment"> **********************************************************************/</span></div> <div class="line"><a name="l00018"></a><span class="lineno"> 18</span> </div> <div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="preprocessor">#ifndef GEOS_ALGORITHM_CENTROID_H</span></div> <div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="preprocessor"></span><span class="preprocessor">#define GEOS_ALGORITHM_CENTROID_H</span></div> <div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="preprocessor"></span></div> <div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="preprocessor">#include <geos/export.h></span></div> <div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="preprocessor">#include <geos/geom/Coordinate.h></span> <span class="comment">// for composition</span></div> <div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="preprocessor">#include <memory></span> <span class="comment">// for std::auto_ptr</span></div> <div class="line"><a name="l00025"></a><span class="lineno"> 25</span> </div> <div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="comment">// Forward declarations</span></div> <div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="keyword">namespace </span>geos {</div> <div class="line"><a name="l00028"></a><span class="lineno"> 28</span>  <span class="keyword">namespace </span>geom {</div> <div class="line"><a name="l00029"></a><span class="lineno"> 29</span>  <span class="keyword">class </span>Geometry;</div> <div class="line"><a name="l00030"></a><span class="lineno"> 30</span>  <span class="keyword">class </span>Polygon;</div> <div class="line"><a name="l00031"></a><span class="lineno"> 31</span>  <span class="keyword">class </span>CoordinateSequence;</div> <div class="line"><a name="l00032"></a><span class="lineno"> 32</span>  }</div> <div class="line"><a name="l00033"></a><span class="lineno"> 33</span> }</div> <div class="line"><a name="l00034"></a><span class="lineno"> 34</span> </div> <div class="line"><a name="l00035"></a><span class="lineno"> 35</span> </div> <div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="keyword">namespace </span>geos {</div> <div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="keyword">namespace </span>algorithm { <span class="comment">// geos::algorithm</span></div> <div class="line"><a name="l00038"></a><span class="lineno"> 38</span> </div> <div class="line"><a name="l00061"></a><span class="lineno"><a class="line" href="classgeos_1_1algorithm_1_1Centroid.html"> 61</a></span> <span class="keyword">class </span>GEOS_DLL <a class="code" href="classgeos_1_1algorithm_1_1Centroid.html">Centroid</a> {</div> <div class="line"><a name="l00062"></a><span class="lineno"> 62</span> </div> <div class="line"><a name="l00063"></a><span class="lineno"> 63</span> <span class="keyword">public</span>:</div> <div class="line"><a name="l00064"></a><span class="lineno"> 64</span> </div> <div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  <span class="keyword">static</span> <span class="keywordtype">bool</span> getCentroid(<span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1Geometry.html">geom::Geometry</a>& geom, <a class="code" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a>& cent);</div> <div class="line"><a name="l00075"></a><span class="lineno"> 75</span> </div> <div class="line"><a name="l00079"></a><span class="lineno"><a class="line" href="classgeos_1_1algorithm_1_1Centroid.html#a004060aaa21454f3dfc50cd859e78b16"> 79</a></span>  <a class="code" href="classgeos_1_1algorithm_1_1Centroid.html#a004060aaa21454f3dfc50cd859e78b16">Centroid</a>(<span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1Geometry.html">geom::Geometry</a>& geom)</div> <div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  :</div> <div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  areasum2(0.0),</div> <div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  totalLength(0.0),</div> <div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  ptCount(0)</div> <div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  {</div> <div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  add(geom);</div> <div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  }</div> <div class="line"><a name="l00087"></a><span class="lineno"> 87</span> </div> <div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  <span class="keywordtype">bool</span> getCentroid(<a class="code" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a>& cent) <span class="keyword">const</span>;</div> <div class="line"><a name="l00097"></a><span class="lineno"> 97</span> </div> <div class="line"><a name="l00098"></a><span class="lineno"> 98</span> <span class="keyword">private</span>:</div> <div class="line"><a name="l00099"></a><span class="lineno"> 99</span> </div> <div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  std::auto_ptr<geom::Coordinate> areaBasePt;</div> <div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  <a class="code" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a> triangleCent3;</div> <div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  <a class="code" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a> cg3;</div> <div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  <a class="code" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a> lineCentSum;</div> <div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  <a class="code" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a> ptCentSum;</div> <div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  <span class="keywordtype">double</span> areasum2;</div> <div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  <span class="keywordtype">double</span> totalLength;</div> <div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  <span class="keywordtype">int</span> ptCount;</div> <div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  </div> <div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  <span class="keywordtype">void</span> add(<span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1Geometry.html">geom::Geometry</a>& geom);</div> <div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  </div> <div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  <span class="keywordtype">void</span> setBasePoint(<span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a>& basePt);</div> <div class="line"><a name="l00117"></a><span class="lineno"> 117</span> </div> <div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  <span class="keywordtype">void</span> add(<span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1Polygon.html">geom::Polygon</a>& poly);</div> <div class="line"><a name="l00119"></a><span class="lineno"> 119</span> </div> <div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  <span class="keywordtype">void</span> addShell(<span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1CoordinateSequence.html">geom::CoordinateSequence</a>& pts);</div> <div class="line"><a name="l00121"></a><span class="lineno"> 121</span> </div> <div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  <span class="keywordtype">void</span> addHole(<span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1CoordinateSequence.html">geom::CoordinateSequence</a>& pts);</div> <div class="line"><a name="l00123"></a><span class="lineno"> 123</span> </div> <div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  <span class="keywordtype">void</span> addTriangle(<span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a>& p0, <span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a>& p1, <span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a>& p2, <span class="keywordtype">bool</span> isPositiveArea);</div> <div class="line"><a name="l00125"></a><span class="lineno"> 125</span> </div> <div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  <span class="keyword">static</span> <span class="keywordtype">void</span> centroid3(<span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a>& p1, <span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a>& p2, <span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a>& p3, <a class="code" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a>& c );</div> <div class="line"><a name="l00132"></a><span class="lineno"> 132</span> </div> <div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  <span class="keyword">static</span> <span class="keywordtype">double</span> area2(<span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a>& p1, <span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a>& p2, <span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a>& p3 );</div> <div class="line"><a name="l00138"></a><span class="lineno"> 138</span> </div> <div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  <span class="keywordtype">void</span> addLineSegments(<span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1CoordinateSequence.html">geom::CoordinateSequence</a>& pts);</div> <div class="line"><a name="l00146"></a><span class="lineno"> 146</span> </div> <div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  <span class="keywordtype">void</span> addPoint(<span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a>& pt);</div> <div class="line"><a name="l00152"></a><span class="lineno"> 152</span> };</div> <div class="line"><a name="l00153"></a><span class="lineno"> 153</span> </div> <div class="line"><a name="l00154"></a><span class="lineno"> 154</span> } <span class="comment">// namespace geos::algorithm</span></div> <div class="line"><a name="l00155"></a><span class="lineno"> 155</span> } <span class="comment">// namespace geos</span></div> <div class="line"><a name="l00156"></a><span class="lineno"> 156</span> </div> <div class="line"><a name="l00157"></a><span class="lineno"> 157</span> <span class="preprocessor">#endif // GEOS_ALGORITHM_CENTROID_H</span></div> <div class="ttc" id="classgeos_1_1geom_1_1Coordinate_html"><div class="ttname"><a href="classgeos_1_1geom_1_1Coordinate.html">geos::geom::Coordinate</a></div><div class="ttdoc">Coordinate is the lightweight class used to store coordinates. </div><div class="ttdef"><b>Definition:</b> Coordinate.h:60</div></div> <div class="ttc" id="classgeos_1_1geom_1_1Geometry_html"><div class="ttname"><a href="classgeos_1_1geom_1_1Geometry.html">geos::geom::Geometry</a></div><div class="ttdoc">Basic implementation of Geometry, constructed and destructed by GeometryFactory. </div><div class="ttdef"><b>Definition:</b> Geometry.h:167</div></div> <div class="ttc" id="classgeos_1_1algorithm_1_1Centroid_html_a004060aaa21454f3dfc50cd859e78b16"><div class="ttname"><a href="classgeos_1_1algorithm_1_1Centroid.html#a004060aaa21454f3dfc50cd859e78b16">geos::algorithm::Centroid::Centroid</a></div><div class="ttdeci">Centroid(const geom::Geometry &geom)</div><div class="ttdef"><b>Definition:</b> Centroid.h:79</div></div> <div class="ttc" id="classgeos_1_1geom_1_1Polygon_html"><div class="ttname"><a href="classgeos_1_1geom_1_1Polygon.html">geos::geom::Polygon</a></div><div class="ttdoc">Represents a linear polygon, which may include holes. </div><div class="ttdef"><b>Definition:</b> Polygon.h:66</div></div> <div class="ttc" id="classgeos_1_1geom_1_1CoordinateSequence_html"><div class="ttname"><a href="classgeos_1_1geom_1_1CoordinateSequence.html">geos::geom::CoordinateSequence</a></div><div class="ttdoc">The internal representation of a list of coordinates inside a Geometry. </div><div class="ttdef"><b>Definition:</b> CoordinateSequence.h:59</div></div> <div class="ttc" id="classgeos_1_1algorithm_1_1Centroid_html"><div class="ttname"><a href="classgeos_1_1algorithm_1_1Centroid.html">geos::algorithm::Centroid</a></div><div class="ttdef"><b>Definition:</b> Centroid.h:61</div></div> </div><!-- fragment --></div><!-- contents --> <!-- start footer part --> <hr class="footer"/><address class="footer"><small> Generated by  <a href="http://www.doxygen.org/index.html"> <img class="footer" src="doxygen.png" alt="doxygen"/> </a> 1.8.5 </small></address> </body> 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