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<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">#define GEOS_ALGORITHM_CGALGORITHMDD_H</span></div><div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="preprocessor">#include <<a class="code" href="export_8h.html">geos/export.h</a>></span></div><div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="preprocessor">#include <<a class="code" href="DD_8h.html">geos/math/DD.h</a>></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="comment">// Forward declarations</span></div><div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="keyword">namespace </span><a class="code" href="namespacegeos.html">geos</a> {</div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="keyword">namespace </span>geom {</div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="keyword">class </span>Coordinate;</div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="keyword">class </span>CoordinateSequence;</div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span> }</div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span> }</div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span> </div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="keyword">using namespace </span><a class="code" href="namespacegeos_1_1math.html">geos::math</a>;</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="keyword">namespace </span><a class="code" href="namespacegeos.html">geos</a> {</div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="keyword">namespace </span>algorithm { <span class="comment">// geos::algorithm</span></div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span> </div><div class="line"><a name="l00038"></a><span class="lineno"><a class="line" href="classgeos_1_1algorithm_1_1CGAlgorithmsDD.html"> 38</a></span> <span class="keyword">class </span><a class="code" href="export_8h.html#ae36df939090171f6e9a28a8cb6254fea">GEOS_DLL</a> <a class="code" href="classgeos_1_1algorithm_1_1CGAlgorithmsDD.html">CGAlgorithmsDD</a> {</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> <span class="keyword">public</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">enum</span> {</div><div class="line"><a name="l00043"></a><span class="lineno"><a class="line" href="classgeos_1_1algorithm_1_1CGAlgorithmsDD.html#a57badcb8314450a31d5d5a503e7ebc25a5fe288f764efa9471689cc0b6ac8fcd9"> 43</a></span>  CLOCKWISE = -1,</div><div class="line"><a name="l00044"></a><span class="lineno"><a class="line" href="classgeos_1_1algorithm_1_1CGAlgorithmsDD.html#a57badcb8314450a31d5d5a503e7ebc25aa4795cd1166fb6eb60b443d072722791"> 44</a></span>  COLLINEAR = 0,</div><div class="line"><a name="l00045"></a><span class="lineno"><a class="line" href="classgeos_1_1algorithm_1_1CGAlgorithmsDD.html#a57badcb8314450a31d5d5a503e7ebc25a1006c02080c20274a85d41fcd56c9628"> 45</a></span>  COUNTERCLOCKWISE = 1</div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  };</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">enum</span> {</div><div class="line"><a name="l00049"></a><span class="lineno"><a class="line" href="classgeos_1_1algorithm_1_1CGAlgorithmsDD.html#adfc808f83820518f99e747cfdf7090daaecd271306f35e6b932f8df4d6b9c9f73"> 49</a></span>  RIGHT = -1,</div><div class="line"><a name="l00050"></a><span class="lineno"><a class="line" href="classgeos_1_1algorithm_1_1CGAlgorithmsDD.html#adfc808f83820518f99e747cfdf7090daaf13fa76480e31d54bd35032ce8963c6e"> 50</a></span>  LEFT = 1,</div><div class="line"><a name="l00051"></a><span class="lineno"><a class="line" href="classgeos_1_1algorithm_1_1CGAlgorithmsDD.html#adfc808f83820518f99e747cfdf7090daa89ff4e62002a9a8cd03333f5ca73782a"> 51</a></span>  STRAIGHT = 0,</div><div class="line"><a name="l00052"></a><span class="lineno"><a class="line" href="classgeos_1_1algorithm_1_1CGAlgorithmsDD.html#adfc808f83820518f99e747cfdf7090daa9f4949d7672ba7a513de15bda7ac09e6"> 52</a></span>  FAILURE = 2</div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  };</div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span> </div><div class="line"><a name="l00067"></a><span class="lineno"> 67</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="l00068"></a><span class="lineno"> 68</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="l00069"></a><span class="lineno"> 69</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="l00070"></a><span class="lineno"> 70</span> </div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span> </div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  <span class="keyword">static</span> <span class="keywordtype">int</span> orientationIndex(<span class="keywordtype">double</span> p1x, <span class="keywordtype">double</span> p1y,</div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  <span class="keywordtype">double</span> p2x, <span class="keywordtype">double</span> p2y,</div><div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  <span class="keywordtype">double</span> qx, <span class="keywordtype">double</span> qy);</div><div class="line"><a name="l00075"></a><span class="lineno"> 75</span> </div><div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  <span class="keyword">static</span> <span class="keywordtype">int</span> orientationIndexFilter(<span class="keywordtype">double</span> pax, <span class="keywordtype">double</span> pay,</div><div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  <span class="keywordtype">double</span> pbx, <span class="keywordtype">double</span> pby,</div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  <span class="keywordtype">double</span> pcx, <span class="keywordtype">double</span> pcy);</div><div class="line"><a name="l00093"></a><span class="lineno"> 93</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">static</span> <span class="keywordtype">int</span></div><div class="line"><a name="l00096"></a><span class="lineno"><a class="line" href="classgeos_1_1algorithm_1_1CGAlgorithmsDD.html#ac89d975848b7388b3a588edde30472a8"> 96</a></span>  <a class="code" href="classgeos_1_1algorithm_1_1CGAlgorithmsDD.html#ac89d975848b7388b3a588edde30472a8">orientation</a>(<span class="keywordtype">double</span> x)</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="keywordflow">if</span>(x < 0) {</div><div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  <span class="keywordflow">return</span> CGAlgorithmsDD::RIGHT;</div><div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  }</div><div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  <span class="keywordflow">if</span>(x > 0) {</div><div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  <span class="keywordflow">return</span> CGAlgorithmsDD::LEFT;</div><div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  }</div><div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  <span class="keywordflow">return</span> CGAlgorithmsDD::STRAIGHT;</div><div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  }</div><div class="line"><a name="l00106"></a><span class="lineno"> 106</span> </div><div class="line"><a name="l00116"></a><span class="lineno"> 116</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="l00117"></a><span class="lineno"> 117</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="l00118"></a><span class="lineno"> 118</span> </div><div class="line"><a name="l00119"></a><span class="lineno"> 119</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="l00120"></a><span class="lineno"> 120</span> </div><div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  <span class="keyword">static</span> <a class="code" href="classgeos_1_1math_1_1DD.html">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="l00122"></a><span class="lineno"> 122</span>  <span class="keyword">static</span> <a class="code" href="classgeos_1_1math_1_1DD.html">DD</a> detDD(<span class="keyword">const</span> <a class="code" href="classgeos_1_1math_1_1DD.html">DD</a>& x1, <span class="keyword">const</span> <a class="code" href="classgeos_1_1math_1_1DD.html">DD</a>& y1, <span class="keyword">const</span> <a class="code" href="classgeos_1_1math_1_1DD.html">DD</a>& x2, <span class="keyword">const</span> <a class="code" href="classgeos_1_1math_1_1DD.html">DD</a>& y2);</div><div class="line"><a name="l00123"></a><span class="lineno"> 123</span> </div><div class="line"><a name="l00147"></a><span class="lineno"> 147</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="l00148"></a><span class="lineno"> 148</span> </div><div class="line"><a name="l00149"></a><span class="lineno"> 149</span> <span class="keyword">protected</span>:</div><div class="line"><a name="l00150"></a><span class="lineno"> 150</span> </div><div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  <span class="keyword">static</span> <span class="keywordtype">int</span> signOfDet2x2(<span class="keyword">const</span> <a class="code" href="classgeos_1_1math_1_1DD.html">DD</a>& x1, <span class="keyword">const</span> <a class="code" href="classgeos_1_1math_1_1DD.html">DD</a>& y1, <span class="keyword">const</span> <a class="code" href="classgeos_1_1math_1_1DD.html">DD</a>& x2, <span class="keyword">const</span> <a class="code" href="classgeos_1_1math_1_1DD.html">DD</a>& y2);</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> </div><div class="line"><a name="l00155"></a><span class="lineno"> 155</span> } <span class="comment">// namespace geos::algorithm</span></div><div class="line"><a name="l00156"></a><span class="lineno"> 156</span> } <span class="comment">// namespace geos</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="preprocessor">#endif // GEOS_ALGORITHM_CGALGORITHM_H</span></div><div class="ttc" id="DD_8h_html"><div class="ttname"><a href="DD_8h.html">DD.h</a></div></div>
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<div class="ttc" id="export_8h_html_ae36df939090171f6e9a28a8cb6254fea"><div class="ttname"><a href="export_8h.html#ae36df939090171f6e9a28a8cb6254fea">GEOS_DLL</a></div><div class="ttdeci">#define GEOS_DLL</div><div class="ttdef"><b>Definition:</b> <a href="export_8h_source.html#l00028">export.h:28</a></div></div>
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<div class="ttc" id="classgeos_1_1math_1_1DD_html"><div class="ttname"><a href="classgeos_1_1math_1_1DD.html">geos::math::DD</a></div><div class="ttdoc">Wrapper for DoubleDouble higher precision mathematics operations. </div><div class="ttdef"><b>Definition:</b> <a href="DD_8h_source.html#l00108">DD.h:108</a></div></div>
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<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> <a href="Coordinate_8h_source.html#l00060">Coordinate.h:60</a></div></div>
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<div class="ttc" id="export_8h_html"><div class="ttname"><a href="export_8h.html">export.h</a></div></div>
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<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> <a href="CGAlgorithmsDD_8h_source.html#l00038">CGAlgorithmsDD.h:38</a></div></div>
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<div class="ttc" id="classgeos_1_1algorithm_1_1CGAlgorithmsDD_html_ac89d975848b7388b3a588edde30472a8"><div class="ttname"><a href="classgeos_1_1algorithm_1_1CGAlgorithmsDD.html#ac89d975848b7388b3a588edde30472a8">geos::algorithm::CGAlgorithmsDD::orientation</a></div><div class="ttdeci">static int orientation(double x)</div><div class="ttdef"><b>Definition:</b> <a href="CGAlgorithmsDD_8h_source.html#l00096">CGAlgorithmsDD.h:96</a></div></div>
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<div class="ttc" id="namespacegeos_html"><div class="ttname"><a href="namespacegeos.html">geos</a></div><div class="ttdoc">Basic namespace for all GEOS functionalities. </div><div class="ttdef"><b>Definition:</b> <a href="IndexedNestedRingTester_8h_source.html#l00026">IndexedNestedRingTester.h:26</a></div></div>
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<div class="ttc" id="namespacegeos_1_1math_html"><div class="ttname"><a href="namespacegeos_1_1math.html">geos::math</a></div><div class="ttdef"><b>Definition:</b> <a href="DD_8h_source.html#l00099">DD.h:99</a></div></div>
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