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</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: noding/SegmentPointComparator.java r320 (JTS-1.12)</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_NODING_SEGMENTPOINTCOMPARATOR_H</span></div> <div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="preprocessor"></span><span class="preprocessor">#define GEOS_NODING_SEGMENTPOINTCOMPARATOR_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> <span class="preprocessor">#include <cassert></span></div> <div class="line"><a name="l00025"></a><span class="lineno"> 25</span> </div> <div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="keyword">namespace </span>geos {</div> <div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="keyword">namespace </span>noding { <span class="comment">// geos.noding</span></div> <div class="line"><a name="l00028"></a><span class="lineno"> 28</span> </div> <div class="line"><a name="l00039"></a><span class="lineno"><a class="line" href="classgeos_1_1noding_1_1SegmentPointComparator.html"> 39</a></span> <span class="keyword">class </span>GEOS_DLL <a class="code" href="classgeos_1_1noding_1_1SegmentPointComparator.html">SegmentPointComparator</a> {</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> <span class="keyword">public</span>:</div> <div class="line"><a name="l00042"></a><span class="lineno"> 42</span> </div> <div class="line"><a name="l00051"></a><span class="lineno"><a class="line" href="classgeos_1_1noding_1_1SegmentPointComparator.html#ad46e6c91ff33c9b14be08072a094ac4a"> 51</a></span>  <span class="keyword">static</span> <span class="keywordtype">int</span> <a class="code" href="classgeos_1_1noding_1_1SegmentPointComparator.html#ad46e6c91ff33c9b14be08072a094ac4a">compare</a>(<span class="keywordtype">int</span> octant, <span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1Coordinate.html">geom::Coordinate</a>& p0,</div> <div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  <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="l00053"></a><span class="lineno"> 53</span>  {</div> <div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  <span class="comment">// nodes can only be equal if their coordinates are equal</span></div> <div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  <span class="keywordflow">if</span> (p0.equals2D(p1)) <span class="keywordflow">return</span> 0;</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="keywordtype">int</span> xSign = relativeSign(p0.<a class="code" href="classgeos_1_1geom_1_1Coordinate.html#ad809a77e5715e490a7e5f95c8611737e">x</a>, p1.<a class="code" href="classgeos_1_1geom_1_1Coordinate.html#ad809a77e5715e490a7e5f95c8611737e">x</a>);</div> <div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  <span class="keywordtype">int</span> ySign = relativeSign(p0.<a class="code" href="classgeos_1_1geom_1_1Coordinate.html#acdeb58356624ebe25cbbf5b6021c3d9d">y</a>, p1.<a class="code" href="classgeos_1_1geom_1_1Coordinate.html#acdeb58356624ebe25cbbf5b6021c3d9d">y</a>);</div> <div class="line"><a name="l00059"></a><span class="lineno"> 59</span> </div> <div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  <span class="keywordflow">switch</span> (octant) {</div> <div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  <span class="keywordflow">case</span> 0: <span class="keywordflow">return</span> compareValue(xSign, ySign);</div> <div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  <span class="keywordflow">case</span> 1: <span class="keywordflow">return</span> compareValue(ySign, xSign);</div> <div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  <span class="keywordflow">case</span> 2: <span class="keywordflow">return</span> compareValue(ySign, -xSign);</div> <div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  <span class="keywordflow">case</span> 3: <span class="keywordflow">return</span> compareValue(-xSign, ySign);</div> <div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  <span class="keywordflow">case</span> 4: <span class="keywordflow">return</span> compareValue(-xSign, -ySign);</div> <div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  <span class="keywordflow">case</span> 5: <span class="keywordflow">return</span> compareValue(-ySign, -xSign);</div> <div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  <span class="keywordflow">case</span> 6: <span class="keywordflow">return</span> compareValue(-ySign, xSign);</div> <div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  <span class="keywordflow">case</span> 7: <span class="keywordflow">return</span> compareValue(xSign, -ySign);</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>  assert(0); <span class="comment">// invalid octant value</span></div> <div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  <span class="keywordflow">return</span> 0;</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> </div> <div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  <span class="keyword">static</span> <span class="keywordtype">int</span> relativeSign(<span class="keywordtype">double</span> x0, <span class="keywordtype">double</span> x1)</div> <div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  {</div> <div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  <span class="keywordflow">if</span> (x0 < x1) <span class="keywordflow">return</span> -1;</div> <div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  <span class="keywordflow">if</span> (x0 > x1) <span class="keywordflow">return</span> 1;</div> <div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  <span class="keywordflow">return</span> 0;</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> </div> <div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  <span class="keyword">static</span> <span class="keywordtype">int</span> compareValue(<span class="keywordtype">int</span> compareSign0, <span class="keywordtype">int</span> compareSign1)</div> <div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  {</div> <div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  <span class="keywordflow">if</span> (compareSign0 < 0) <span class="keywordflow">return</span> -1;</div> <div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  <span class="keywordflow">if</span> (compareSign0 > 0) <span class="keywordflow">return</span> 1;</div> <div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  <span class="keywordflow">if</span> (compareSign1 < 0) <span class="keywordflow">return</span> -1;</div> <div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  <span class="keywordflow">if</span> (compareSign1 > 0) <span class="keywordflow">return</span> 1;</div> <div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  <span class="keywordflow">return</span> 0;</div> <div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  }</div> <div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  </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> } <span class="comment">// namespace geos.noding</span></div> <div class="line"><a name="l00094"></a><span class="lineno"> 94</span> } <span class="comment">// namespace geos</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="preprocessor">#endif // GEOS_NODING_SEGMENTPOINTCOMPARATOR_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_1noding_1_1SegmentPointComparator_html_ad46e6c91ff33c9b14be08072a094ac4a"><div class="ttname"><a href="classgeos_1_1noding_1_1SegmentPointComparator.html#ad46e6c91ff33c9b14be08072a094ac4a">geos::noding::SegmentPointComparator::compare</a></div><div class="ttdeci">static int compare(int octant, const geom::Coordinate &p0, const geom::Coordinate &p1)</div><div class="ttdef"><b>Definition:</b> SegmentPointComparator.h:51</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_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 class="ttc" id="classgeos_1_1noding_1_1SegmentPointComparator_html"><div class="ttname"><a href="classgeos_1_1noding_1_1SegmentPointComparator.html">geos::noding::SegmentPointComparator</a></div><div class="ttdef"><b>Definition:</b> SegmentPointComparator.h:39</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>