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<h1>CentroidArea.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: CentroidArea.h 2556 2009-06-06 22:22:28Z 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
<a name="l00017"></a>00017 <span class="preprocessor">#ifndef GEOS_ALGORITHM_CENTROIDAREA_H</span>
<a name="l00018"></a>00018 <span class="preprocessor"></span><span class="preprocessor">#define GEOS_ALGORITHM_CENTROIDAREA_H</span>
<a name="l00019"></a>00019 <span class="preprocessor"></span>
<a name="l00020"></a>00020
<a name="l00021"></a>00021 <span class="preprocessor">#include <geos/export.h></span>
<a name="l00022"></a>00022 <span class="preprocessor">#include <geos/geom/Coordinate.h></span>
<a name="l00023"></a>00023
<a name="l00024"></a>00024 <span class="comment">// Forward declarations</span>
<a name="l00025"></a>00025 <span class="keyword">namespace </span>geos {
<a name="l00026"></a>00026 <span class="keyword">namespace </span>geom {
<a name="l00027"></a>00027 <span class="keyword">class </span>CoordinateSequence;
<a name="l00028"></a>00028 <span class="keyword">class </span>Geometry;
<a name="l00029"></a>00029 <span class="keyword">class </span>Polygon;
<a name="l00030"></a>00030 }
<a name="l00031"></a>00031 }
<a name="l00032"></a>00032
<a name="l00033"></a>00033 <span class="keyword">namespace </span>geos {
<a name="l00034"></a>00034 <span class="keyword">namespace </span>algorithm { <span class="comment">// geos::algorithm</span>
<a name="l00035"></a>00035
<a name="l00050"></a><a class="code" href="classgeos_1_1algorithm_1_1CentroidArea.html">00050</a> <span class="keyword">class </span>GEOS_DLL <a class="code" href="classgeos_1_1algorithm_1_1CentroidArea.html" title="Computes the centroid of an area geometry.">CentroidArea</a> {
<a name="l00051"></a>00051
<a name="l00052"></a>00052 <span class="keyword">public</span>:
<a name="l00053"></a>00053
<a name="l00054"></a>00054 <a class="code" href="classgeos_1_1algorithm_1_1CentroidArea.html" title="Computes the centroid of an area geometry.">CentroidArea</a>()
<a name="l00055"></a>00055 :
<a name="l00056"></a>00056 basePt(0.0, 0.0),
<a name="l00057"></a>00057 areasum2(0)
<a name="l00058"></a>00058 {}
<a name="l00059"></a>00059
<a name="l00060"></a>00060 ~<a class="code" href="classgeos_1_1algorithm_1_1CentroidArea.html" title="Computes the centroid of an area geometry.">CentroidArea</a>() {}
<a name="l00061"></a>00061
<a name="l00068"></a>00068 <span class="keywordtype">void</span> add(<span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1Geometry.html" title="Basic implementation of Geometry, constructed and destructed by GeometryFactory.">geom::Geometry</a> *geom);
<a name="l00069"></a>00069
<a name="l00076"></a>00076 <span class="keywordtype">void</span> add(<span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1CoordinateSequence.html" title="The internal representation of a list of coordinates inside a Geometry.">geom::CoordinateSequence</a> *ring);
<a name="l00077"></a>00077
<a name="l00078"></a>00078 <a class="code" href="classgeos_1_1geom_1_1Coordinate.html" title="Coordinate is the lightweight class used to store coordinates.">geom::Coordinate</a>* getCentroid() <span class="keyword">const</span>;
<a name="l00079"></a>00079
<a name="l00081"></a>00081 <span class="keywordtype">bool</span> getCentroid(<a class="code" href="classgeos_1_1geom_1_1Coordinate.html" title="Coordinate is the lightweight class used to store coordinates.">geom::Coordinate</a>& ret) <span class="keyword">const</span>;
<a name="l00082"></a>00082
<a name="l00083"></a>00083 <span class="keyword">private</span>:
<a name="l00084"></a>00084
<a name="l00086"></a>00086 <a class="code" href="classgeos_1_1geom_1_1Coordinate.html" title="Coordinate is the lightweight class used to store coordinates.">geom::Coordinate</a> basePt;
<a name="l00087"></a>00087
<a name="l00088"></a>00088 <span class="comment">// temporary variable to hold centroid of triangle</span>
<a name="l00089"></a>00089 <a class="code" href="classgeos_1_1geom_1_1Coordinate.html" title="Coordinate is the lightweight class used to store coordinates.">geom::Coordinate</a> triangleCent3;
<a name="l00090"></a>00090
<a name="l00092"></a>00092 <span class="keywordtype">double</span> areasum2;
<a name="l00093"></a>00093
<a name="l00095"></a>00095 <a class="code" href="classgeos_1_1geom_1_1Coordinate.html" title="Coordinate is the lightweight class used to store coordinates.">geom::Coordinate</a> cg3;
<a name="l00096"></a>00096
<a name="l00097"></a>00097 <span class="keywordtype">void</span> setBasePoint(<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> &newbasePt);
<a name="l00098"></a>00098
<a name="l00099"></a>00099 <span class="keywordtype">void</span> add(<span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1Polygon.html" title="Represents a linear polygon, which may include holes.">geom::Polygon</a> *poly);
<a name="l00100"></a>00100
<a name="l00101"></a>00101 <span class="keywordtype">void</span> addShell(<span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1CoordinateSequence.html" title="The internal representation of a list of coordinates inside a Geometry.">geom::CoordinateSequence</a> *pts);
<a name="l00102"></a>00102
<a name="l00103"></a>00103 <span class="keywordtype">void</span> addHole(<span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1CoordinateSequence.html" title="The internal representation of a list of coordinates inside a Geometry.">geom::CoordinateSequence</a> *pts);
<a name="l00104"></a>00104
<a name="l00105"></a>00105 <span class="keywordtype">void</span> addTriangle(<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> &p0, <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> &p1,
<a name="l00106"></a>00106 <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> &p2,<span class="keywordtype">bool</span> isPositiveArea);
<a name="l00107"></a>00107
<a name="l00108"></a>00108 <span class="keyword">static</span> <span class="keywordtype">void</span> centroid3(<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> &p1, <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> &p2,
<a name="l00109"></a>00109 <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> &p3, <a class="code" href="classgeos_1_1geom_1_1Coordinate.html" title="Coordinate is the lightweight class used to store coordinates.">geom::Coordinate</a> &c);
<a name="l00110"></a>00110
<a name="l00111"></a>00111 <span class="keyword">static</span> <span class="keywordtype">double</span> area2(<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> &p1, <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> &p2,
<a name="l00112"></a>00112 <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> &p3);
<a name="l00113"></a>00113
<a name="l00114"></a>00114 };
<a name="l00115"></a>00115
<a name="l00116"></a>00116 } <span class="comment">// namespace geos::algorithm</span>
<a name="l00117"></a>00117 } <span class="comment">// namespace geos</span>
<a name="l00118"></a>00118
<a name="l00119"></a>00119
<a name="l00120"></a>00120 <span class="preprocessor">#endif // GEOS_ALGORITHM_CENTROIDAREA_H</span>
<a name="l00121"></a>00121 <span class="preprocessor"></span>
<a name="l00122"></a>00122 <span class="comment">/**********************************************************************</span>
<a name="l00123"></a>00123 <span class="comment"> * $Log$</span>
<a name="l00124"></a>00124 <span class="comment"> * Revision 1.1 2006/03/09 16:46:48 strk</span>
<a name="l00125"></a>00125 <span class="comment"> * geos::geom namespace definition, first pass at headers split</span>
<a name="l00126"></a>00126 <span class="comment"> *</span>
<a name="l00127"></a>00127 <span class="comment"> **********************************************************************/</span>
<a name="l00128"></a>00128
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