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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: CGAlgorithms.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) 2011 Sandro Santilli <strk@keybit.net></span></div> <div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> * Copyright (C) 2005-2006 Refractions Research Inc.</span></div> <div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> * Copyright (C) 2001-2002 Vivid Solutions Inc.</span></div> <div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment"> *</span></div> <div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"> * This is free software; you can redistribute and/or modify it under</span></div> <div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"> * the terms of the GNU Lesser General Public Licence as published</span></div> <div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"> * by the Free Software Foundation. </span></div> <div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment"> * See the COPYING file for more information.</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"> *</span></div> <div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment"> * Last port: algorithm/CGAlgorithms.java r378 (JTS-1.12)</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> <span class="comment"> **********************************************************************/</span></div> <div class="line"><a name="l00020"></a><span class="lineno"> 20</span> </div> <div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="preprocessor">#ifndef GEOS_ALGORITHM_CGALGORITHM_H</span></div> <div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="preprocessor"></span><span class="preprocessor">#define GEOS_ALGORITHM_CGALGORITHM_H</span></div> <div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="preprocessor"></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 <vector></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>Coordinate;</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="l00047"></a><span class="lineno"><a class="line" href="classgeos_1_1algorithm_1_1CGAlgorithms.html"> 47</a></span> <span class="keyword">class </span>GEOS_DLL <a class="code" href="classgeos_1_1algorithm_1_1CGAlgorithms.html">CGAlgorithms</a> {</div> <div class="line"><a name="l00048"></a><span class="lineno"> 48</span> </div> <div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="keyword">public</span>:</div> <div class="line"><a name="l00050"></a><span class="lineno"> 50</span> </div> <div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  <span class="keyword">enum</span> {</div> <div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  CLOCKWISE=-1,</div> <div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  COLLINEAR,</div> <div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  COUNTERCLOCKWISE</div> <div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  };</div> <div class="line"><a name="l00056"></a><span class="lineno"> 56</span> </div> <div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  <span class="keyword">enum</span> {</div> <div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  RIGHT=-1,</div> <div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  LEFT,</div> <div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  STRAIGHT</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> </div> <div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  <a class="code" href="classgeos_1_1algorithm_1_1CGAlgorithms.html">CGAlgorithms</a>(){}</div> <div class="line"><a name="l00064"></a><span class="lineno"> 64</span> </div> <div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  <span class="keyword">static</span> <span class="keywordtype">bool</span> isPointInRing(<span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a>& p,</div> <div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  <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="l00083"></a><span class="lineno"> 83</span> </div> <div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  <span class="keyword">static</span> <span class="keywordtype">bool</span> isPointInRing(<span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a>& p,</div> <div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  <span class="keyword">const</span> std::vector<const geom::Coordinate*>& ring);</div> <div class="line"><a name="l00087"></a><span class="lineno"> 87</span> </div> <div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  <span class="keyword">static</span> <span class="keywordtype">int</span> locatePointInRing(<span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a>& p,</div> <div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  <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="l00104"></a><span class="lineno"> 104</span> </div> <div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  <span class="keyword">static</span> <span class="keywordtype">int</span> locatePointInRing(<span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a>& p,</div> <div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  <span class="keyword">const</span> std::vector<const geom::Coordinate*>& ring);</div> <div class="line"><a name="l00108"></a><span class="lineno"> 108</span> </div> <div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  <span class="keyword">static</span> <span class="keywordtype">bool</span> isOnLine(<span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a>& p,</div> <div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  <span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1CoordinateSequence.html">geom::CoordinateSequence</a>* pt);</div> <div class="line"><a name="l00118"></a><span class="lineno"> 118</span> </div> <div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  <span class="keyword">static</span> <span class="keywordtype">bool</span> isCCW(<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="l00135"></a><span class="lineno"> 135</span> </div> <div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  <span class="keyword">static</span> <span class="keywordtype">int</span> computeOrientation(<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="l00149"></a><span class="lineno"> 149</span>  <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="l00150"></a><span class="lineno"> 150</span>  <span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a>& q);</div> <div class="line"><a name="l00151"></a><span class="lineno"> 151</span> </div> <div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  <span class="keyword">static</span> <span class="keywordtype">double</span> distancePointLine(<span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a>& p,</div> <div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  <span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a>& A,</div> <div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  <span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a>& B);</div> <div class="line"><a name="l00165"></a><span class="lineno"> 165</span> </div> <div class="line"><a name="l00175"></a><span class="lineno"> 175</span>  <span class="keyword">static</span> <span class="keywordtype">double</span> distancePointLinePerpendicular(<span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a>& p,</div> <div class="line"><a name="l00176"></a><span class="lineno"> 176</span>  <span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a>& A,</div> <div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  <span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a>& B);</div> <div class="line"><a name="l00178"></a><span class="lineno"> 178</span> </div> <div class="line"><a name="l00189"></a><span class="lineno"> 189</span>  <span class="keyword">static</span> <span class="keywordtype">double</span> distanceLineLine(<span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a>& A,</div> <div class="line"><a name="l00190"></a><span class="lineno"> 190</span>  <span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a>& B,</div> <div class="line"><a name="l00191"></a><span class="lineno"> 191</span>  <span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a>& C,</div> <div class="line"><a name="l00192"></a><span class="lineno"> 192</span>  <span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a>& D);</div> <div class="line"><a name="l00193"></a><span class="lineno"> 193</span> </div> <div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  <span class="keyword">static</span> <span class="keywordtype">double</span> signedArea(<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="l00199"></a><span class="lineno"> 199</span> </div> <div class="line"><a name="l00207"></a><span class="lineno"> 207</span>  <span class="keyword">static</span> <span class="keywordtype">double</span> length(<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="l00208"></a><span class="lineno"> 208</span> </div> <div class="line"><a name="l00221"></a><span class="lineno"> 221</span>  <span class="keyword">static</span> <span class="keywordtype">int</span> orientationIndex(<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="l00222"></a><span class="lineno"> 222</span>  <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="l00223"></a><span class="lineno"> 223</span>  <span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a>& q);</div> <div class="line"><a name="l00224"></a><span class="lineno"> 224</span> </div> <div class="line"><a name="l00225"></a><span class="lineno"> 225</span> };</div> <div class="line"><a name="l00226"></a><span class="lineno"> 226</span> </div> <div class="line"><a name="l00227"></a><span class="lineno"> 227</span> } <span class="comment">// namespace geos::algorithm</span></div> <div class="line"><a name="l00228"></a><span class="lineno"> 228</span> } <span class="comment">// namespace geos</span></div> <div class="line"><a name="l00229"></a><span class="lineno"> 229</span> </div> <div class="line"><a name="l00230"></a><span class="lineno"> 230</span> <span class="preprocessor">#endif // GEOS_ALGORITHM_CGALGORITHM_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_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_1CGAlgorithms_html"><div class="ttname"><a href="classgeos_1_1algorithm_1_1CGAlgorithms.html">geos::algorithm::CGAlgorithms</a></div><div class="ttdoc">Specifies and implements various fundamental Computational Geometric algorithms. The algorithms suppl...</div><div class="ttdef"><b>Definition:</b> CGAlgorithms.h:47</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>