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<h1>Quadrant.h</h1>  </div>
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<div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/**********************************************************************</span>
<a name="l00002"></a>00002 <span class="comment"> * $Id: Quadrant.h 2557 2009-06-08 09:30:55Z strk $</span>
<a name="l00003"></a>00003 <span class="comment"> *</span>
<a name="l00004"></a>00004 <span class="comment"> * GEOS - Geometry Engine Open Source</span>
<a name="l00005"></a>00005 <span class="comment"> * http://geos.refractions.net</span>
<a name="l00006"></a>00006 <span class="comment"> *</span>
<a name="l00007"></a>00007 <span class="comment"> * Copyright (C) 2005-2006 Refractions Research Inc.</span>
<a name="l00008"></a>00008 <span class="comment"> * Copyright (C) 2001-2002 Vivid Solutions Inc.</span>
<a name="l00009"></a>00009 <span class="comment"> *</span>
<a name="l00010"></a>00010 <span class="comment"> * This is free software; you can redistribute and/or modify it under</span>
<a name="l00011"></a>00011 <span class="comment"> * the terms of the GNU Lesser General Public Licence as published</span>
<a name="l00012"></a>00012 <span class="comment"> * by the Free Software Foundation. </span>
<a name="l00013"></a>00013 <span class="comment"> * See the COPYING file for more information.</span>
<a name="l00014"></a>00014 <span class="comment"> *</span>
<a name="l00015"></a>00015 <span class="comment"> **********************************************************************</span>
<a name="l00016"></a>00016 <span class="comment"> *</span>
<a name="l00017"></a>00017 <span class="comment"> * Last port: geomgraph/Quadrant.java rev. 1.8 (JTS-1.10)</span>
<a name="l00018"></a>00018 <span class="comment"> *</span>
<a name="l00019"></a>00019 <span class="comment"> **********************************************************************/</span>
<a name="l00020"></a>00020 
<a name="l00021"></a>00021 
<a name="l00022"></a>00022 <span class="preprocessor">#ifndef GEOS_GEOMGRAPH_QUADRANT_H</span>
<a name="l00023"></a>00023 <span class="preprocessor"></span><span class="preprocessor">#define GEOS_GEOMGRAPH_QUADRANT_H</span>
<a name="l00024"></a>00024 <span class="preprocessor"></span>
<a name="l00025"></a>00025 <span class="preprocessor">#include &lt;geos/export.h&gt;</span>
<a name="l00026"></a>00026 <span class="preprocessor">#include &lt;string&gt;</span>
<a name="l00027"></a>00027 
<a name="l00028"></a>00028 <span class="preprocessor">#include &lt;geos/inline.h&gt;</span>
<a name="l00029"></a>00029 
<a name="l00030"></a>00030 <span class="comment">// Forward declarations</span>
<a name="l00031"></a>00031 <span class="keyword">namespace </span>geos {
<a name="l00032"></a>00032         <span class="keyword">namespace </span>geom {
<a name="l00033"></a>00033                 <span class="keyword">class </span>Coordinate;
<a name="l00034"></a>00034         }
<a name="l00035"></a>00035 }
<a name="l00036"></a>00036 
<a name="l00037"></a>00037 <span class="keyword">namespace </span>geos {
<a name="l00038"></a>00038 <span class="keyword">namespace </span>geomgraph { <span class="comment">// geos.geomgraph</span>
<a name="l00039"></a>00039 
<a name="l00049"></a><a class="code" href="classgeos_1_1geomgraph_1_1Quadrant.html">00049</a> <span class="keyword">class </span>GEOS_DLL <a class="code" href="classgeos_1_1geomgraph_1_1Quadrant.html">Quadrant</a> {
<a name="l00050"></a>00050 
<a name="l00051"></a>00051 <span class="keyword">public</span>:
<a name="l00052"></a>00052 
<a name="l00053"></a>00053         <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">int</span> NE = 0;
<a name="l00054"></a>00054         <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">int</span> NW = 1;
<a name="l00055"></a>00055         <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">int</span> SW = 2;
<a name="l00056"></a>00056         <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">int</span> SE = 3;
<a name="l00057"></a>00057 
<a name="l00064"></a>00064         <span class="keyword">static</span> <span class="keywordtype">int</span> quadrant(<span class="keywordtype">double</span> dx, <span class="keywordtype">double</span> dy);
<a name="l00065"></a>00065 
<a name="l00071"></a>00071         <span class="keyword">static</span> <span class="keywordtype">int</span> quadrant(<span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1Coordinate.html" title="Coordinate is the lightweight class used to store coordinates.">geom::Coordinate</a>&amp; p0,
<a name="l00072"></a>00072                             <span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1Coordinate.html" title="Coordinate is the lightweight class used to store coordinates.">geom::Coordinate</a>&amp; p1);
<a name="l00073"></a>00073 
<a name="l00077"></a>00077         <span class="keyword">static</span> <span class="keywordtype">bool</span> isOpposite(<span class="keywordtype">int</span> quad1, <span class="keywordtype">int</span> quad2);
<a name="l00078"></a>00078 
<a name="l00079"></a>00079         <span class="comment">/* </span>
<a name="l00080"></a>00080 <span class="comment">         * Returns the right-hand quadrant of the halfplane defined by</span>
<a name="l00081"></a>00081 <span class="comment">         * the two quadrants,</span>
<a name="l00082"></a>00082 <span class="comment">         * or -1 if the quadrants are opposite, or the quadrant if they</span>
<a name="l00083"></a>00083 <span class="comment">         * are identical.</span>
<a name="l00084"></a>00084 <span class="comment">         */</span>
<a name="l00085"></a>00085         <span class="keyword">static</span> <span class="keywordtype">int</span> commonHalfPlane(<span class="keywordtype">int</span> quad1, <span class="keywordtype">int</span> quad2);
<a name="l00086"></a>00086 
<a name="l00091"></a>00091         <span class="keyword">static</span> <span class="keywordtype">bool</span> isInHalfPlane(<span class="keywordtype">int</span> quad, <span class="keywordtype">int</span> halfPlane);
<a name="l00092"></a>00092 
<a name="l00096"></a>00096         <span class="keyword">static</span> <span class="keywordtype">bool</span> isNorthern(<span class="keywordtype">int</span> quad);
<a name="l00097"></a>00097 };
<a name="l00098"></a>00098 
<a name="l00099"></a>00099 
<a name="l00100"></a>00100 } <span class="comment">// namespace geos.geomgraph</span>
<a name="l00101"></a>00101 } <span class="comment">// namespace geos</span>
<a name="l00102"></a>00102 
<a name="l00103"></a>00103 <span class="comment">//#ifdef GEOS_INLINE</span>
<a name="l00104"></a>00104 <span class="comment">//# include &quot;geos/geomgraph/Quadrant.inl&quot;</span>
<a name="l00105"></a>00105 <span class="comment">//#endif</span>
<a name="l00106"></a>00106 
<a name="l00107"></a>00107 <span class="preprocessor">#endif // ifndef GEOS_GEOMGRAPH_QUADRANT_H</span>
<a name="l00108"></a>00108 <span class="preprocessor"></span>
<a name="l00109"></a>00109 <span class="comment">/**********************************************************************</span>
<a name="l00110"></a>00110 <span class="comment"> * $Log$</span>
<a name="l00111"></a>00111 <span class="comment"> * Revision 1.2  2006/03/24 09:52:41  strk</span>
<a name="l00112"></a>00112 <span class="comment"> * USE_INLINE =&gt; GEOS_INLINE</span>
<a name="l00113"></a>00113 <span class="comment"> *</span>
<a name="l00114"></a>00114 <span class="comment"> * Revision 1.1  2006/03/09 16:46:49  strk</span>
<a name="l00115"></a>00115 <span class="comment"> * geos::geom namespace definition, first pass at headers split</span>
<a name="l00116"></a>00116 <span class="comment"> *</span>
<a name="l00117"></a>00117 <span class="comment"> **********************************************************************/</span>
<a name="l00118"></a>00118 
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