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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: CGAlgorithmsDD.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">3.8.0</span> </div> </td> </tr> </tbody> </table> </div> <!-- end header part --> <!-- Generated by 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class="title">CGAlgorithmsDD.h</div> </div> </div><!--header--> <div class="contents"> <a href="CGAlgorithmsDD_8h.html">Go to the documentation of this file.</a><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) 2014 Mateusz Loskot <mateusz@loskot.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/CGAlgorithmsDD.java r789 (JTS-1.14)</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_CGALGORITHMDD_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_CGALGORITHMDD_H</span></div> <div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="preprocessor"></span><span class="preprocessor">#include <geos/export.h></span></div> <div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="preprocessor">#include <geos/algorithm/ttmath/ttmath.h></span></div> <div class="line"><a name="l00023"></a><span class="lineno"> 23</span> </div> <div class="line"><a name="l00025"></a><span class="lineno"> 25</span> </div> <div class="line"><a name="l00029"></a><span class="lineno"><a class="line" href="CGAlgorithmsDD_8h.html#a7812d8a8dd4af919fce2d6c2bc226973"> 29</a></span> <span class="keyword">typedef</span> ttmath::Big<TTMATH_BITS(32), TTMATH_BITS(128)> <a class="code" href="CGAlgorithmsDD_8h.html#a7812d8a8dd4af919fce2d6c2bc226973">DD</a>;</div> <div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="comment">//typedef ttmath::Big<TTMATH_BITS(64), TTMATH_BITS(128)> DD;</span></div> <div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="comment">//typedef ttmath::Big<TTMATH_BITS(32), TTMATH_BITS(256)> DD;</span></div> <div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="comment">//typedef ttmath::Big<TTMATH_BITS(64), TTMATH_BITS(256)> DD;</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> <span class="comment">// Forward declarations</span></div> <div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="keyword">namespace </span>geos {</div> <div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="keyword">namespace </span>geom {</div> <div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="keyword">class </span>Coordinate;</div> <div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="keyword">class </span>CoordinateSequence;</div> <div class="line"><a name="l00039"></a><span class="lineno"> 39</span> }</div> <div class="line"><a name="l00040"></a><span class="lineno"> 40</span> }</div> <div class="line"><a name="l00041"></a><span class="lineno"> 41</span> </div> <div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="keyword">namespace </span>geos {</div> <div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="keyword">namespace </span>algorithm { <span class="comment">// geos::algorithm</span></div> <div class="line"><a name="l00044"></a><span class="lineno"> 44</span> </div> <div class="line"><a name="l00046"></a><span class="lineno"><a class="line" href="classgeos_1_1algorithm_1_1CGAlgorithmsDD.html"> 46</a></span> <span class="keyword">class </span>GEOS_DLL <a class="code" href="classgeos_1_1algorithm_1_1CGAlgorithmsDD.html">CGAlgorithmsDD</a> {</div> <div class="line"><a name="l00047"></a><span class="lineno"> 47</span> </div> <div class="line"><a name="l00048"></a><span class="lineno"> 48</span> <span class="keyword">public</span>:</div> <div class="line"><a name="l00049"></a><span class="lineno"> 49</span> </div> <div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  <span class="keyword">enum</span> {</div> <div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  CLOCKWISE = -1,</div> <div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  COLLINEAR = 0,</div> <div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  COUNTERCLOCKWISE = 1</div> <div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  };</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>  <span class="keyword">enum</span> {</div> <div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  RIGHT = -1,</div> <div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  LEFT = 1,</div> <div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  STRAIGHT = 0,</div> <div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  FAILURE = 2</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="l00075"></a><span class="lineno"> 75</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="l00076"></a><span class="lineno"> 76</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="l00077"></a><span class="lineno"> 77</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="l00098"></a><span class="lineno"> 98</span>  <span class="keyword">static</span> <span class="keywordtype">int</span> orientationIndexFilter(<span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a>& pa,</div> <div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  <span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a>& pb,</div> <div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  <span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a>& pc);</div> <div class="line"><a name="l00101"></a><span class="lineno"> 101</span> </div> <div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  <span class="keyword">static</span> <span class="keywordtype">int</span></div> <div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  orientation(<span class="keywordtype">double</span> x)</div> <div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  {</div> <div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  <span class="keywordflow">if</span>(x < 0) {</div> <div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  <span class="keywordflow">return</span> CGAlgorithmsDD::RIGHT;</div> <div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  }</div> <div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  <span class="keywordflow">if</span>(x > 0) {</div> <div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  <span class="keywordflow">return</span> CGAlgorithmsDD::LEFT;</div> <div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  }</div> <div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  <span class="keywordflow">return</span> CGAlgorithmsDD::STRAIGHT;</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> </div> <div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  <span class="keyword">static</span> <a class="code" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a> intersection(<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="l00124"></a><span class="lineno"> 124</span>  <span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a>& q1, <span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a>& q2);</div> <div class="line"><a name="l00125"></a><span class="lineno"> 125</span> </div> <div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  <span class="keyword">static</span> <span class="keywordtype">int</span> signOfDet2x2(<span class="keywordtype">double</span> dx1, <span class="keywordtype">double</span> dy1, <span class="keywordtype">double</span> dx2, <span class="keywordtype">double</span> dy2);</div> <div class="line"><a name="l00127"></a><span class="lineno"> 127</span> </div> <div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  <span class="keyword">static</span> <a class="code" href="CGAlgorithmsDD_8h.html#a7812d8a8dd4af919fce2d6c2bc226973">DD</a> detDD(<span class="keywordtype">double</span> x1, <span class="keywordtype">double</span> y1, <span class="keywordtype">double</span> x2, <span class="keywordtype">double</span> y2);</div> <div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  <span class="keyword">static</span> <a class="code" href="CGAlgorithmsDD_8h.html#a7812d8a8dd4af919fce2d6c2bc226973">DD</a> detDD(<span class="keyword">const</span> <a class="code" href="CGAlgorithmsDD_8h.html#a7812d8a8dd4af919fce2d6c2bc226973">DD</a>& x1, <span class="keyword">const</span> <a class="code" href="CGAlgorithmsDD_8h.html#a7812d8a8dd4af919fce2d6c2bc226973">DD</a>& y1, <span class="keyword">const</span> <a class="code" href="CGAlgorithmsDD_8h.html#a7812d8a8dd4af919fce2d6c2bc226973">DD</a>& x2, <span class="keyword">const</span> <a class="code" href="CGAlgorithmsDD_8h.html#a7812d8a8dd4af919fce2d6c2bc226973">DD</a>& y2);</div> <div class="line"><a name="l00130"></a><span class="lineno"> 130</span> </div> <div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  <span class="keyword">static</span> <a class="code" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a> circumcentreDD(<span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a>& a, <span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a>& b, <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="l00155"></a><span class="lineno"> 155</span> </div> <div class="line"><a name="l00156"></a><span class="lineno"> 156</span> <span class="keyword">protected</span>:</div> <div class="line"><a name="l00157"></a><span class="lineno"> 157</span> </div> <div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  <span class="keyword">static</span> <span class="keywordtype">int</span> signOfDet2x2(<span class="keyword">const</span> <a class="code" href="CGAlgorithmsDD_8h.html#a7812d8a8dd4af919fce2d6c2bc226973">DD</a>& x1, <span class="keyword">const</span> <a class="code" href="CGAlgorithmsDD_8h.html#a7812d8a8dd4af919fce2d6c2bc226973">DD</a>& y1, <span class="keyword">const</span> <a class="code" href="CGAlgorithmsDD_8h.html#a7812d8a8dd4af919fce2d6c2bc226973">DD</a>& x2, <span class="keyword">const</span> <a class="code" href="CGAlgorithmsDD_8h.html#a7812d8a8dd4af919fce2d6c2bc226973">DD</a>& y2);</div> <div class="line"><a name="l00159"></a><span class="lineno"> 159</span> </div> <div class="line"><a name="l00160"></a><span class="lineno"> 160</span> };</div> <div class="line"><a name="l00161"></a><span class="lineno"> 161</span> </div> <div class="line"><a name="l00162"></a><span class="lineno"> 162</span> } <span class="comment">// namespace geos::algorithm</span></div> <div class="line"><a name="l00163"></a><span class="lineno"> 163</span> } <span class="comment">// namespace geos</span></div> <div class="line"><a name="l00164"></a><span class="lineno"> 164</span> </div> <div class="line"><a name="l00165"></a><span class="lineno"> 165</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="CGAlgorithmsDD_8h_html_a7812d8a8dd4af919fce2d6c2bc226973"><div class="ttname"><a href="CGAlgorithmsDD_8h.html#a7812d8a8dd4af919fce2d6c2bc226973">DD</a></div><div class="ttdeci">ttmath::Big< TTMATH_BITS(32), TTMATH_BITS(128)> DD</div><div class="ttdoc">Close to DoubleDouble equivalent used by JTS. </div><div class="ttdef"><b>Definition:</b> CGAlgorithmsDD.h:29</div></div> <div class="ttc" id="classgeos_1_1algorithm_1_1CGAlgorithmsDD_html"><div class="ttname"><a href="classgeos_1_1algorithm_1_1CGAlgorithmsDD.html">geos::algorithm::CGAlgorithmsDD</a></div><div class="ttdoc">Implements basic computational geometry algorithms using extended precision float-point arithmetic...</div><div class="ttdef"><b>Definition:</b> CGAlgorithmsDD.h:46</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>