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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: CentroidArea.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 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<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) 2005-2006 Refractions Research Inc.</span></div> <div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> * Copyright (C) 2001-2002 Vivid Solutions Inc.</span></div> <div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> *</span></div> <div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment"> * This is free software; you can redistribute and/or modify it under</span></div> <div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"> * the terms of the GNU Lesser General Public Licence as published</span></div> <div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"> * by the Free Software Foundation. </span></div> <div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"> * See the COPYING file for more information.</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"> *</span></div> <div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment"> * Last port: algorithm/CentroidArea.java r612</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> <span class="comment"> **********************************************************************/</span></div> <div class="line"><a name="l00019"></a><span class="lineno"> 19</span> </div> <div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="preprocessor">#ifndef GEOS_ALGORITHM_CENTROIDAREA_H</span></div> <div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="preprocessor"></span><span class="preprocessor">#define GEOS_ALGORITHM_CENTROIDAREA_H</span></div> <div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="preprocessor"></span></div> <div class="line"><a name="l00023"></a><span class="lineno"> 23</span> </div> <div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="preprocessor">#include <geos/export.h></span></div> <div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="preprocessor">#include <geos/geom/Coordinate.h></span></div> <div class="line"><a name="l00026"></a><span class="lineno"> 26</span> </div> <div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="comment">// Forward declarations</span></div> <div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="keyword">namespace </span>geos {</div> <div class="line"><a name="l00029"></a><span class="lineno"> 29</span>  <span class="keyword">namespace </span>geom {</div> <div class="line"><a name="l00030"></a><span class="lineno"> 30</span>  <span class="keyword">class </span>CoordinateSequence;</div> <div class="line"><a name="l00031"></a><span class="lineno"> 31</span>  <span class="keyword">class </span>Geometry;</div> <div class="line"><a name="l00032"></a><span class="lineno"> 32</span>  <span class="keyword">class </span>Polygon;</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="l00060"></a><span class="lineno"><a class="line" href="classgeos_1_1algorithm_1_1CentroidArea.html"> 60</a></span> <span class="keyword">class </span>GEOS_DLL <a class="code" href="classgeos_1_1algorithm_1_1CentroidArea.html">CentroidArea</a> {</div> <div class="line"><a name="l00061"></a><span class="lineno"> 61</span> </div> <div class="line"><a name="l00062"></a><span class="lineno"> 62</span> <span class="keyword">public</span>:</div> <div class="line"><a name="l00063"></a><span class="lineno"> 63</span> </div> <div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  <a class="code" href="classgeos_1_1algorithm_1_1CentroidArea.html">CentroidArea</a>()</div> <div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  :</div> <div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  basePt(0.0, 0.0),</div> <div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  areasum2(0.0),</div> <div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  totalLength(0.0)</div> <div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  {}</div> <div class="line"><a name="l00070"></a><span class="lineno"> 70</span> </div> <div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  ~<a class="code" href="classgeos_1_1algorithm_1_1CentroidArea.html">CentroidArea</a>() {}</div> <div class="line"><a name="l00072"></a><span class="lineno"> 72</span> </div> <div class="line"><a name="l00079"></a><span class="lineno"> 79</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="l00080"></a><span class="lineno"> 80</span> </div> <div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  <span class="keywordtype">void</span> add(<span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1CoordinateSequence.html">geom::CoordinateSequence</a> *ring);</div> <div class="line"><a name="l00088"></a><span class="lineno"> 88</span> </div> <div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  <span class="comment">// TODO: deprecate</span></div> <div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  <a class="code" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a>* getCentroid() <span class="keyword">const</span>;</div> <div class="line"><a name="l00091"></a><span class="lineno"> 91</span> </div> <div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  <span class="keywordtype">bool</span> getCentroid(<a class="code" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a>& ret) <span class="keyword">const</span>;</div> <div class="line"><a name="l00094"></a><span class="lineno"> 94</span> </div> <div class="line"><a name="l00095"></a><span class="lineno"> 95</span> <span class="keyword">private</span>:</div> <div class="line"><a name="l00096"></a><span class="lineno"> 96</span> </div> <div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  <a class="code" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a> basePt;</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>  <span class="comment">// temporary variable to hold centroid of triangle</span></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> </div> <div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  <span class="keywordtype">double</span> areasum2; </div> <div class="line"><a name="l00105"></a><span class="lineno"> 105</span> </div> <div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  <a class="code" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a> cg3;</div> <div class="line"><a name="l00108"></a><span class="lineno"> 108</span> </div> <div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  <span class="comment">// data for linear centroid computation, if needed</span></div> <div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  <a class="code" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a> centSum;</div> <div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  <span class="keywordtype">double</span> totalLength;</div> <div class="line"><a name="l00112"></a><span class="lineno"> 112</span> </div> <div class="line"><a name="l00113"></a><span class="lineno"> 113</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> &newbasePt);</div> <div class="line"><a name="l00114"></a><span class="lineno"> 114</span> </div> <div class="line"><a name="l00115"></a><span class="lineno"> 115</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="l00116"></a><span class="lineno"> 116</span> </div> <div class="line"><a name="l00117"></a><span class="lineno"> 117</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="l00118"></a><span class="lineno"> 118</span> </div> <div class="line"><a name="l00119"></a><span class="lineno"> 119</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="l00120"></a><span class="lineno"> 120</span>  </div> <div class="line"><a name="l00121"></a><span class="lineno"> 121</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,</div> <div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  <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="l00123"></a><span class="lineno"> 123</span> </div> <div class="line"><a name="l00124"></a><span class="lineno"> 124</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,</div> <div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  <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="l00126"></a><span class="lineno"> 126</span> </div> <div class="line"><a name="l00127"></a><span class="lineno"> 127</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,</div> <div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  <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="l00129"></a><span class="lineno"> 129</span> </div> <div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  <span class="keywordtype">void</span> addLinearSegments(<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="l00140"></a><span class="lineno"> 140</span> </div> <div class="line"><a name="l00141"></a><span class="lineno"> 141</span> };</div> <div class="line"><a name="l00142"></a><span class="lineno"> 142</span> </div> <div class="line"><a name="l00143"></a><span class="lineno"> 143</span> } <span class="comment">// namespace geos::algorithm</span></div> <div class="line"><a name="l00144"></a><span class="lineno"> 144</span> } <span class="comment">// namespace geos</span></div> <div class="line"><a name="l00145"></a><span class="lineno"> 145</span> </div> <div class="line"><a name="l00146"></a><span class="lineno"> 146</span> </div> <div class="line"><a name="l00147"></a><span class="lineno"> 147</span> <span class="preprocessor">#endif // GEOS_ALGORITHM_CENTROIDAREA_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_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_1algorithm_1_1CentroidArea_html"><div class="ttname"><a href="classgeos_1_1algorithm_1_1CentroidArea.html">geos::algorithm::CentroidArea</a></div><div class="ttdoc">Computes the centroid of an area geometry. </div><div class="ttdef"><b>Definition:</b> CentroidArea.h:60</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><!-- 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> </html>