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<li class="navelem"><a class="el" href="dir_d44c64559bbebec7f509842c48db8b23.html">include</a></li><li class="navelem"><a class="el" href="dir_0bc14b2fb119a11b6a0f32f4d350db61.html">geos</a></li><li class="navelem"><a class="el" href="dir_fba022f40ef995f34b1af53ee3c8dd03.html">algorithm</a></li> </ul>
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<a href="ConvexHull_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>&#160;<span class="comment">/**********************************************************************</span></div><div class="line"><a name="l00002"></a><span class="lineno"> 2</span>&#160;<span class="comment"> *</span></div><div class="line"><a name="l00003"></a><span class="lineno"> 3</span>&#160;<span class="comment"> * GEOS - Geometry Engine Open Source</span></div><div class="line"><a name="l00004"></a><span class="lineno"> 4</span>&#160;<span class="comment"> * http://geos.osgeo.org</span></div><div class="line"><a name="l00005"></a><span class="lineno"> 5</span>&#160;<span class="comment"> *</span></div><div class="line"><a name="l00006"></a><span class="lineno"> 6</span>&#160;<span class="comment"> * Copyright (C) 2011 Sandro Santilli &lt;strk@kbt.io&gt;</span></div><div class="line"><a name="l00007"></a><span class="lineno"> 7</span>&#160;<span class="comment"> * Copyright (C) 2005-2006 Refractions Research Inc.</span></div><div class="line"><a name="l00008"></a><span class="lineno"> 8</span>&#160;<span class="comment"> * Copyright (C) 2001-2002 Vivid Solutions Inc.</span></div><div class="line"><a name="l00009"></a><span class="lineno"> 9</span>&#160;<span class="comment"> *</span></div><div class="line"><a name="l00010"></a><span class="lineno"> 10</span>&#160;<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>&#160;<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>&#160;<span class="comment"> * by the Free Software Foundation.</span></div><div class="line"><a name="l00013"></a><span class="lineno"> 13</span>&#160;<span class="comment"> * See the COPYING file for more information.</span></div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span>&#160;<span class="comment"> *</span></div><div class="line"><a name="l00015"></a><span class="lineno"> 15</span>&#160;<span class="comment"> **********************************************************************</span></div><div class="line"><a name="l00016"></a><span class="lineno"> 16</span>&#160;<span class="comment"> *</span></div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span>&#160;<span class="comment"> * Last port: algorithm/ConvexHull.java r407 (JTS-1.12+)</span></div><div class="line"><a name="l00018"></a><span class="lineno"> 18</span>&#160;<span class="comment"> *</span></div><div class="line"><a name="l00019"></a><span class="lineno"> 19</span>&#160;<span class="comment"> **********************************************************************/</span></div><div class="line"><a name="l00020"></a><span class="lineno"> 20</span>&#160;</div><div class="line"><a name="l00021"></a><span class="lineno"> 21</span>&#160;<span class="preprocessor">#ifndef GEOS_ALGORITHM_CONVEXHULL_H</span></div><div class="line"><a name="l00022"></a><span class="lineno"> 22</span>&#160;<span class="preprocessor">#define GEOS_ALGORITHM_CONVEXHULL_H</span></div><div class="line"><a name="l00023"></a><span class="lineno"> 23</span>&#160;</div><div class="line"><a name="l00024"></a><span class="lineno"> 24</span>&#160;<span class="preprocessor">#include &lt;<a class="code" href="export_8h.html">geos/export.h</a>&gt;</span></div><div class="line"><a name="l00025"></a><span class="lineno"> 25</span>&#160;<span class="preprocessor">#include &lt;memory&gt;</span></div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span>&#160;<span class="preprocessor">#include &lt;vector&gt;</span></div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span>&#160;</div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span>&#160;<span class="comment">// FIXME: avoid using Cordinate:: typedefs to avoid full include</span></div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span>&#160;<span class="preprocessor">#include &lt;<a class="code" href="Coordinate_8h.html">geos/geom/Coordinate.h</a>&gt;</span></div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span>&#160;<span class="preprocessor">#include &lt;<a class="code" href="CoordinateSequence_8h.html">geos/geom/CoordinateSequence.h</a>&gt;</span></div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span>&#160;</div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span>&#160;<span class="preprocessor">#ifdef _MSC_VER</span></div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span>&#160;<span class="preprocessor">#pragma warning(push)</span></div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span>&#160;<span class="preprocessor">#pragma warning(disable: 4251) // warning C4251: needs to have dll-interface to be used by clients of class</span></div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span>&#160;<span class="preprocessor">#endif</span></div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span>&#160;</div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span>&#160;<span class="comment">// Forward declarations</span></div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span>&#160;<span class="keyword">namespace </span><a class="code" href="namespacegeos.html">geos</a> {</div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span>&#160;<span class="keyword">namespace </span>geom {</div><div class="line"><a name="l00040"></a><span class="lineno"> 40</span>&#160;<span class="keyword">class </span>Geometry;</div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span>&#160;<span class="keyword">class </span>GeometryFactory;</div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span>&#160;}</div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span>&#160;}</div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span>&#160;</div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span>&#160;<span class="keyword">namespace </span><a class="code" href="namespacegeos.html">geos</a> {</div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span>&#160;<span class="keyword">namespace </span>algorithm { <span class="comment">// geos::algorithm</span></div><div class="line"><a name="l00047"></a><span class="lineno"> 47</span>&#160;</div><div class="line"><a name="l00059"></a><span class="lineno"><a class="line" href="classgeos_1_1algorithm_1_1ConvexHull.html"> 59</a></span>&#160;<span class="keyword">class </span><a class="code" href="export_8h.html#ae36df939090171f6e9a28a8cb6254fea">GEOS_DLL</a> <a class="code" href="classgeos_1_1algorithm_1_1ConvexHull.html">ConvexHull</a> {</div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span>&#160;<span class="keyword">private</span>:</div><div class="line"><a name="l00061"></a><span class="lineno"><a class="line" href="classgeos_1_1algorithm_1_1ConvexHull.html#abdc58119826eb8b076fec9a655a36ba5"> 61</a></span>&#160; <span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1GeometryFactory.html">geom::GeometryFactory</a>* <a class="code" href="classgeos_1_1algorithm_1_1ConvexHull.html#abdc58119826eb8b076fec9a655a36ba5">geomFactory</a>;</div><div class="line"><a name="l00062"></a><span class="lineno"><a class="line" href="classgeos_1_1algorithm_1_1ConvexHull.html#a199ba621fdf237c5f15b437103745e3f"> 62</a></span>&#160; <a class="code" href="classgeos_1_1geom_1_1Coordinate.html#a59a363dbe699943a46ea014355e63cac">geom::Coordinate::ConstVect</a> <a class="code" href="classgeos_1_1algorithm_1_1ConvexHull.html#a199ba621fdf237c5f15b437103745e3f">inputPts</a>;</div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span>&#160;</div><div class="line"><a name="l00064"></a><span class="lineno"> 64</span>&#160; <span class="keywordtype">void</span> extractCoordinates(<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="l00065"></a><span class="lineno"> 65</span>&#160;</div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span>&#160; std::unique_ptr&lt;geom::CoordinateSequence&gt; toCoordinateSequence(<a class="code" href="classgeos_1_1geom_1_1Coordinate.html#a59a363dbe699943a46ea014355e63cac">geom::Coordinate::ConstVect</a>&amp; cv);</div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span>&#160;</div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span>&#160; <span class="keywordtype">void</span> computeOctPts(<span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1Coordinate.html#a59a363dbe699943a46ea014355e63cac">geom::Coordinate::ConstVect</a>&amp; src,</div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span>&#160; <a class="code" href="classgeos_1_1geom_1_1Coordinate.html#a59a363dbe699943a46ea014355e63cac">geom::Coordinate::ConstVect</a>&amp; tgt);</div><div class="line"><a name="l00074"></a><span class="lineno"> 74</span>&#160;</div><div class="line"><a name="l00075"></a><span class="lineno"> 75</span>&#160; <span class="keywordtype">bool</span> computeOctRing(<span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1Coordinate.html#a59a363dbe699943a46ea014355e63cac">geom::Coordinate::ConstVect</a>&amp; src,</div><div class="line"><a name="l00076"></a><span class="lineno"> 76</span>&#160; <a class="code" href="classgeos_1_1geom_1_1Coordinate.html#a59a363dbe699943a46ea014355e63cac">geom::Coordinate::ConstVect</a>&amp; tgt);</div><div class="line"><a name="l00077"></a><span class="lineno"> 77</span>&#160;</div><div class="line"><a name="l00102"></a><span class="lineno"> 102</span>&#160; <span class="keywordtype">void</span> reduce(<a class="code" href="classgeos_1_1geom_1_1Coordinate.html#a59a363dbe699943a46ea014355e63cac">geom::Coordinate::ConstVect</a>&amp; pts);</div><div class="line"><a name="l00103"></a><span class="lineno"> 103</span>&#160;</div><div class="line"><a name="l00105"></a><span class="lineno"> 105</span>&#160; <span class="keywordtype">void</span> padArray3(<a class="code" href="classgeos_1_1geom_1_1Coordinate.html#a59a363dbe699943a46ea014355e63cac">geom::Coordinate::ConstVect</a>&amp; pts);</div><div class="line"><a name="l00106"></a><span class="lineno"> 106</span>&#160;</div><div class="line"><a name="l00108"></a><span class="lineno"> 108</span>&#160; <span class="keywordtype">void</span> preSort(<a class="code" href="classgeos_1_1geom_1_1Coordinate.html#a59a363dbe699943a46ea014355e63cac">geom::Coordinate::ConstVect</a>&amp; pts);</div><div class="line"><a name="l00109"></a><span class="lineno"> 109</span>&#160;</div><div class="line"><a name="l00127"></a><span class="lineno"> 127</span>&#160; <span class="keywordtype">int</span> polarCompare(<span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a>&amp; o,</div><div class="line"><a name="l00128"></a><span class="lineno"> 128</span>&#160; <span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a>&amp; p, <span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a>&amp; q);</div><div class="line"><a name="l00129"></a><span class="lineno"> 129</span>&#160;</div><div class="line"><a name="l00130"></a><span class="lineno"> 130</span>&#160; <span class="keywordtype">void</span> grahamScan(<span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1Coordinate.html#a59a363dbe699943a46ea014355e63cac">geom::Coordinate::ConstVect</a>&amp; c,</div><div class="line"><a name="l00131"></a><span class="lineno"> 131</span>&#160; <a class="code" href="classgeos_1_1geom_1_1Coordinate.html#a59a363dbe699943a46ea014355e63cac">geom::Coordinate::ConstVect</a>&amp; ps);</div><div class="line"><a name="l00132"></a><span class="lineno"> 132</span>&#160;</div><div class="line"><a name="l00142"></a><span class="lineno"> 142</span>&#160; std::unique_ptr&lt;geom::Geometry&gt; lineOrPolygon(<span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1Coordinate.html#a59a363dbe699943a46ea014355e63cac">geom::Coordinate::ConstVect</a>&amp; vertices);</div><div class="line"><a name="l00143"></a><span class="lineno"> 143</span>&#160;</div><div class="line"><a name="l00148"></a><span class="lineno"> 148</span>&#160; <span class="keywordtype">void</span> cleanRing(<span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1Coordinate.html#a59a363dbe699943a46ea014355e63cac">geom::Coordinate::ConstVect</a>&amp; input,</div><div class="line"><a name="l00149"></a><span class="lineno"> 149</span>&#160; <a class="code" href="classgeos_1_1geom_1_1Coordinate.html#a59a363dbe699943a46ea014355e63cac">geom::Coordinate::ConstVect</a>&amp; cleaned);</div><div class="line"><a name="l00150"></a><span class="lineno"> 150</span>&#160;</div><div class="line"><a name="l00155"></a><span class="lineno"> 155</span>&#160; <span class="keywordtype">bool</span> isBetween(<span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a>&amp; c1, <span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a>&amp; c2, <span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a>&amp; c3);</div><div class="line"><a name="l00156"></a><span class="lineno"> 156</span>&#160;</div><div class="line"><a name="l00157"></a><span class="lineno"> 157</span>&#160;<span class="keyword">public</span>:</div><div class="line"><a name="l00158"></a><span class="lineno"> 158</span>&#160;</div><div class="line"><a name="l00162"></a><span class="lineno"> 162</span>&#160; <a class="code" href="classgeos_1_1algorithm_1_1ConvexHull.html">ConvexHull</a>(<span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1Geometry.html">geom::Geometry</a>* newGeometry);</div><div class="line"><a name="l00163"></a><span class="lineno"> 163</span>&#160;</div><div class="line"><a name="l00164"></a><span class="lineno"> 164</span>&#160;</div><div class="line"><a name="l00165"></a><span class="lineno"> 165</span>&#160; ~<a class="code" href="classgeos_1_1algorithm_1_1ConvexHull.html">ConvexHull</a>();</div><div class="line"><a name="l00166"></a><span class="lineno"> 166</span>&#160;</div><div class="line"><a name="l00179"></a><span class="lineno"> 179</span>&#160; std::unique_ptr&lt;geom::Geometry&gt; getConvexHull();</div><div class="line"><a name="l00180"></a><span class="lineno"> 180</span>&#160;};</div><div class="line"><a name="l00181"></a><span class="lineno"> 181</span>&#160;</div><div class="line"><a name="l00182"></a><span class="lineno"> 182</span>&#160;} <span class="comment">// namespace geos::algorithm</span></div><div class="line"><a name="l00183"></a><span class="lineno"> 183</span>&#160;} <span class="comment">// namespace geos</span></div><div class="line"><a name="l00184"></a><span class="lineno"> 184</span>&#160;</div><div class="line"><a name="l00185"></a><span class="lineno"> 185</span>&#160;<span class="preprocessor">#ifdef _MSC_VER</span></div><div class="line"><a name="l00186"></a><span class="lineno"> 186</span>&#160;<span class="preprocessor">#pragma warning(pop)</span></div><div class="line"><a name="l00187"></a><span class="lineno"> 187</span>&#160;<span class="preprocessor">#endif</span></div><div class="line"><a name="l00188"></a><span class="lineno"> 188</span>&#160;</div><div class="line"><a name="l00189"></a><span class="lineno"> 189</span>&#160;<span class="preprocessor">#ifdef GEOS_INLINE</span></div><div class="line"><a name="l00190"></a><span class="lineno"> 190</span>&#160;<span class="preprocessor"># include &quot;geos/algorithm/ConvexHull.inl&quot;</span></div><div class="line"><a name="l00191"></a><span class="lineno"> 191</span>&#160;<span class="preprocessor">#endif</span></div><div class="line"><a name="l00192"></a><span class="lineno"> 192</span>&#160;</div><div class="line"><a name="l00193"></a><span class="lineno"> 193</span>&#160;<span class="preprocessor">#endif // GEOS_ALGORITHM_CONVEXHULL_H</span></div><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>
<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>
<div class="ttc" id="export_8h_html"><div class="ttname"><a href="export_8h.html">export.h</a></div></div>
<div class="ttc" id="classgeos_1_1algorithm_1_1ConvexHull_html_abdc58119826eb8b076fec9a655a36ba5"><div class="ttname"><a href="classgeos_1_1algorithm_1_1ConvexHull.html#abdc58119826eb8b076fec9a655a36ba5">geos::algorithm::ConvexHull::geomFactory</a></div><div class="ttdeci">const geom::GeometryFactory * geomFactory</div><div class="ttdef"><b>Definition:</b> <a href="ConvexHull_8h_source.html#l00061">ConvexHull.h:61</a></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> <a href="Geometry_8h_source.html#l00188">Geometry.h:188</a></div></div>
<div class="ttc" id="classgeos_1_1geom_1_1Coordinate_html_a59a363dbe699943a46ea014355e63cac"><div class="ttname"><a href="classgeos_1_1geom_1_1Coordinate.html#a59a363dbe699943a46ea014355e63cac">geos::geom::Coordinate::ConstVect</a></div><div class="ttdeci">std::vector&lt; const Coordinate * &gt; ConstVect</div><div class="ttdoc">A vector of const Coordinate pointers. </div><div class="ttdef"><b>Definition:</b> <a href="Coordinate_8h_source.html#l00071">Coordinate.h:71</a></div></div>
<div class="ttc" id="CoordinateSequence_8h_html"><div class="ttname"><a href="CoordinateSequence_8h.html">CoordinateSequence.h</a></div></div>
<div class="ttc" id="classgeos_1_1geom_1_1GeometryFactory_html"><div class="ttname"><a href="classgeos_1_1geom_1_1GeometryFactory.html">geos::geom::GeometryFactory</a></div><div class="ttdoc">Supplies a set of utility methods for building Geometry objects from CoordinateSequence or other Geom...</div><div class="ttdef"><b>Definition:</b> <a href="GeometryFactory_8h_source.html#l00068">GeometryFactory.h:68</a></div></div>
<div class="ttc" id="classgeos_1_1algorithm_1_1ConvexHull_html"><div class="ttname"><a href="classgeos_1_1algorithm_1_1ConvexHull.html">geos::algorithm::ConvexHull</a></div><div class="ttdoc">Computes the convex hull of a Geometry. </div><div class="ttdef"><b>Definition:</b> <a href="ConvexHull_8h_source.html#l00059">ConvexHull.h:59</a></div></div>
<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>
<div class="ttc" id="classgeos_1_1algorithm_1_1ConvexHull_html_a199ba621fdf237c5f15b437103745e3f"><div class="ttname"><a href="classgeos_1_1algorithm_1_1ConvexHull.html#a199ba621fdf237c5f15b437103745e3f">geos::algorithm::ConvexHull::inputPts</a></div><div class="ttdeci">geom::Coordinate::ConstVect inputPts</div><div class="ttdef"><b>Definition:</b> <a href="ConvexHull_8h_source.html#l00062">ConvexHull.h:62</a></div></div>
<div class="ttc" id="Coordinate_8h_html"><div class="ttname"><a href="Coordinate_8h.html">Coordinate.h</a></div></div>
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