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</div> </div><!--header--> <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) 2006 Refractions Research Inc.</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/CentralEndpointIntersector.java rev. 1.1</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_CENTRALENDPOINTINTERSECTOR_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_CENTRALENDPOINTINTERSECTOR_H</span></div> <div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="preprocessor"></span></div> <div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="preprocessor">#include <geos/export.h></span></div> <div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="preprocessor">#include <geos/geom/Coordinate.h></span></div> <div class="line"><a name="l00024"></a><span class="lineno"> 24</span> </div> <div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="preprocessor">#include <string></span></div> <div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="preprocessor">#include <limits></span></div> <div class="line"><a name="l00027"></a><span class="lineno"> 27</span> </div> <div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="preprocessor">#ifdef _MSC_VER</span></div> <div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="preprocessor"></span><span class="preprocessor">#pragma warning(push)</span></div> <div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="preprocessor"></span><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="l00031"></a><span class="lineno"> 31</span> <span class="preprocessor"></span><span class="preprocessor">#endif</span></div> <div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="preprocessor"></span></div> <div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="comment">// Forward declarations</span></div> <div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="keyword">namespace </span>geos {</div> <div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  <span class="keyword">namespace </span>geom {</div> <div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  <span class="comment">//class PrecisionModel;</span></div> <div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  }</div> <div class="line"><a name="l00038"></a><span class="lineno"> 38</span> }</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">namespace </span>geos {</div> <div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="keyword">namespace </span>algorithm { <span class="comment">// geos::algorithm</span></div> <div class="line"><a name="l00042"></a><span class="lineno"> 42</span> </div> <div class="line"><a name="l00062"></a><span class="lineno"><a class="line" href="classgeos_1_1algorithm_1_1CentralEndpointIntersector.html"> 62</a></span> <span class="keyword">class </span>GEOS_DLL <a class="code" href="classgeos_1_1algorithm_1_1CentralEndpointIntersector.html">CentralEndpointIntersector</a> {</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> <span class="keyword">public</span>: </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>  <span class="keyword">static</span> <span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a>& getIntersection(<span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a>& p00,</div> <div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  <span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a>& p01, <span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a>& p10,</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>& p11)</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>  <a class="code" href="classgeos_1_1algorithm_1_1CentralEndpointIntersector.html">CentralEndpointIntersector</a> intor(p00, p01, p10, p11);</div> <div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  <span class="keywordflow">return</span> intor.getIntersection();</div> <div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  }</div> <div class="line"><a name="l00073"></a><span class="lineno"> 73</span> </div> <div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  <a class="code" href="classgeos_1_1algorithm_1_1CentralEndpointIntersector.html">CentralEndpointIntersector</a>(<span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a>& p00,</div> <div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  <span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a>& p01,</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>& p10,</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>& p11)</div> <div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  :</div> <div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  _pts(4)</div> <div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  {</div> <div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  _pts[0]=p00;</div> <div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  _pts[1]=p01;</div> <div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  _pts[2]=p10;</div> <div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  _pts[3]=p11;</div> <div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  compute();</div> <div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  }</div> <div class="line"><a name="l00087"></a><span class="lineno"> 87</span> </div> <div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  <span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a>& getIntersection()<span class="keyword"> const</span></div> <div class="line"><a name="l00089"></a><span class="lineno"> 89</span> <span class="keyword"> </span>{</div> <div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  <span class="keywordflow">return</span> _intPt;</div> <div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  }</div> <div class="line"><a name="l00092"></a><span class="lineno"> 92</span> </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> <span class="keyword">private</span>:</div> <div class="line"><a name="l00095"></a><span class="lineno"> 95</span> </div> <div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  <span class="comment">// This is likely overkill.. we'll be allocating heap</span></div> <div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  <span class="comment">// memory at every call !</span></div> <div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  std::vector<geom::Coordinate> _pts;</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>  <a class="code" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a> _intPt;</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="keywordtype">void</span> compute()</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>  <a class="code" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a> centroid = average(_pts);</div> <div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  _intPt = findNearestPoint(centroid, _pts);</div> <div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  }</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="keyword">static</span> <a class="code" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a> average(</div> <div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  <span class="keyword">const</span> std::vector<geom::Coordinate>& pts)</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>  <a class="code" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a> avg(0, 0);</div> <div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  <span class="keywordtype">size_t</span> n = pts.size();</div> <div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  <span class="keywordflow">if</span> ( ! n ) <span class="keywordflow">return</span> avg;</div> <div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  <span class="keywordflow">for</span> (std::size_t i=0; i<n; ++i)</div> <div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  {</div> <div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  avg.<a class="code" href="classgeos_1_1geom_1_1Coordinate.html#ad809a77e5715e490a7e5f95c8611737e">x</a> += pts[i].x;</div> <div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  avg.<a class="code" href="classgeos_1_1geom_1_1Coordinate.html#acdeb58356624ebe25cbbf5b6021c3d9d">y</a> += pts[i].y;</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>  avg.<a class="code" href="classgeos_1_1geom_1_1Coordinate.html#ad809a77e5715e490a7e5f95c8611737e">x</a> /= n;</div> <div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  avg.<a class="code" href="classgeos_1_1geom_1_1Coordinate.html#acdeb58356624ebe25cbbf5b6021c3d9d">y</a> /= n;</div> <div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  <span class="keywordflow">return</span> avg;</div> <div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  }</div> <div class="line"><a name="l00123"></a><span class="lineno"> 123</span> </div> <div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  <a class="code" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a> findNearestPoint(<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="l00135"></a><span class="lineno"> 135</span>  <span class="keyword">const</span> std::vector<geom::Coordinate>& pts)<span class="keyword"> const</span></div> <div class="line"><a name="l00136"></a><span class="lineno"> 136</span> <span class="keyword"> </span>{</div> <div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  <span class="keywordtype">double</span> minDist = std::numeric_limits<double>::max();</div> <div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  <a class="code" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a> result = geom::Coordinate::getNull();</div> <div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  <span class="keywordflow">for</span> (std::size_t i = 0, n=pts.size(); i < n; ++i) {</div> <div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  <span class="keywordtype">double</span> dist = p.<a class="code" href="classgeos_1_1geom_1_1Coordinate.html#a9a30687133579e261178d099a238ef19">distance</a>(pts[i]);</div> <div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  <span class="keywordflow">if</span> (dist < minDist) {</div> <div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  minDist = dist;</div> <div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  result = pts[i];</div> <div class="line"><a name="l00144"></a><span class="lineno"> 144</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>  <span class="keywordflow">return</span> result;</div> <div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  }</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> </div> <div class="line"><a name="l00150"></a><span class="lineno"> 150</span> } <span class="comment">// namespace geos::algorithm</span></div> <div class="line"><a name="l00151"></a><span class="lineno"> 151</span> } <span class="comment">// namespace geos</span></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> <span class="preprocessor">#ifdef _MSC_VER</span></div> <div class="line"><a name="l00154"></a><span class="lineno"> 154</span> <span class="preprocessor"></span><span class="preprocessor">#pragma warning(pop)</span></div> <div class="line"><a name="l00155"></a><span class="lineno"> 155</span> <span class="preprocessor"></span><span class="preprocessor">#endif</span></div> <div class="line"><a name="l00156"></a><span class="lineno"> 156</span> <span class="preprocessor"></span></div> <div class="line"><a name="l00157"></a><span class="lineno"> 157</span> <span class="preprocessor">#endif // GEOS_ALGORITHM_CENTRALENDPOINTINTERSECTOR_H</span></div> <div class="ttc" id="classgeos_1_1geom_1_1Coordinate_html_acdeb58356624ebe25cbbf5b6021c3d9d"><div class="ttname"><a href="classgeos_1_1geom_1_1Coordinate.html#acdeb58356624ebe25cbbf5b6021c3d9d">geos::geom::Coordinate::y</a></div><div class="ttdeci">double y</div><div class="ttdoc">y-coordinate </div><div class="ttdef"><b>Definition:</b> Coordinate.h:83</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> Coordinate.h:60</div></div> <div class="ttc" id="classgeos_1_1algorithm_1_1CentralEndpointIntersector_html"><div class="ttname"><a href="classgeos_1_1algorithm_1_1CentralEndpointIntersector.html">geos::algorithm::CentralEndpointIntersector</a></div><div class="ttdoc">Computes an approximate intersection of two line segments by taking the most central of the endpoints...</div><div class="ttdef"><b>Definition:</b> CentralEndpointIntersector.h:62</div></div> <div class="ttc" id="classgeos_1_1geom_1_1Coordinate_html_a9a30687133579e261178d099a238ef19"><div class="ttname"><a href="classgeos_1_1geom_1_1Coordinate.html#a9a30687133579e261178d099a238ef19">geos::geom::Coordinate::distance</a></div><div class="ttdeci">double distance(const Coordinate &p) const </div></div> <div class="ttc" id="classgeos_1_1geom_1_1Coordinate_html_ad809a77e5715e490a7e5f95c8611737e"><div class="ttname"><a href="classgeos_1_1geom_1_1Coordinate.html#ad809a77e5715e490a7e5f95c8611737e">geos::geom::Coordinate::x</a></div><div class="ttdeci">double x</div><div class="ttdoc">x-coordinate </div><div class="ttdef"><b>Definition:</b> Coordinate.h:80</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>