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<h1>PolygonExtracter.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: PolygonExtracter.h 2772 2009-12-03 19:30:54Z mloskot $</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) 2001-2002 Vivid Solutions Inc.</span>
<a name="l00008"></a>00008 <span class="comment"> * Copyright (C) 2006 Refractions Research 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_GEOM_UTIL_POLYGONEXTRACTER_H</span>
<a name="l00018"></a>00018 <span class="preprocessor"></span><span class="preprocessor">#define GEOS_GEOM_UTIL_POLYGONEXTRACTER_H</span>
<a name="l00019"></a>00019 <span class="preprocessor"></span>
<a name="l00020"></a>00020 <span class="preprocessor">#include <geos/export.h></span>
<a name="l00021"></a>00021 <span class="preprocessor">#include <geos/geom/GeometryFilter.h></span>
<a name="l00022"></a>00022 <span class="preprocessor">#include <geos/geom/Polygon.h></span>
<a name="l00023"></a>00023 <span class="preprocessor">#include <geos/platform.h></span>
<a name="l00024"></a>00024 <span class="preprocessor">#include <vector></span>
<a name="l00025"></a>00025
<a name="l00026"></a>00026 <span class="keyword">namespace </span>geos {
<a name="l00027"></a>00027 <span class="keyword">namespace </span>geom { <span class="comment">// geos.geom</span>
<a name="l00028"></a>00028 <span class="keyword">namespace </span>util { <span class="comment">// geos.geom.util</span>
<a name="l00029"></a>00029
<a name="l00033"></a><a class="code" href="classgeos_1_1geom_1_1util_1_1PolygonExtracter.html">00033</a> <span class="keyword">class </span>GEOS_DLL <a class="code" href="classgeos_1_1geom_1_1util_1_1PolygonExtracter.html">PolygonExtracter</a>: <span class="keyword">public</span> <a class="code" href="classgeos_1_1geom_1_1GeometryFilter.html" title="Geometry classes support the concept of applying a Geometry filter to the Geometry.">GeometryFilter</a> {
<a name="l00034"></a>00034
<a name="l00035"></a>00035 <span class="keyword">public</span>:
<a name="l00036"></a>00036
<a name="l00044"></a><a class="code" href="classgeos_1_1geom_1_1util_1_1PolygonExtracter.html#a07459487328b25bc059cd4e7b6234621">00044</a> <span class="keyword">static</span> <span class="keywordtype">void</span> getPolygons(<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.">Geometry</a> &geom, std::vector<const Polygon*>& ret)
<a name="l00045"></a>00045 {
<a name="l00046"></a>00046 <a class="code" href="classgeos_1_1geom_1_1util_1_1PolygonExtracter.html">PolygonExtracter</a> pe(ret);
<a name="l00047"></a>00047 geom.apply_ro(&pe);
<a name="l00048"></a>00048 }
<a name="l00049"></a>00049
<a name="l00054"></a><a class="code" href="classgeos_1_1geom_1_1util_1_1PolygonExtracter.html#af83d475fa78039eee7c1ebe2f4c12e98">00054</a> <a class="code" href="classgeos_1_1geom_1_1util_1_1PolygonExtracter.html">PolygonExtracter</a>(std::vector<const Polygon*>& newComps)
<a name="l00055"></a>00055 :
<a name="l00056"></a>00056 comps(newComps)
<a name="l00057"></a>00057 {}
<a name="l00058"></a>00058
<a name="l00059"></a>00059 <span class="keywordtype">void</span> filter_rw(<a class="code" href="classgeos_1_1geom_1_1Geometry.html" title="Basic implementation of Geometry, constructed and destructed by GeometryFactory.">Geometry</a> *geom) {
<a name="l00060"></a>00060 <span class="keywordflow">if</span> ( <span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1Polygon.html" title="Represents a linear polygon, which may include holes.">Polygon</a> *p=dynamic_cast<const Polygon *>(geom) )
<a name="l00061"></a>00061 {
<a name="l00062"></a>00062 comps.push_back(p);
<a name="l00063"></a>00063 }
<a name="l00064"></a>00064 }
<a name="l00065"></a>00065
<a name="l00066"></a>00066 <span class="keywordtype">void</span> filter_ro(<span class="keyword">const</span> Geometry *geom)
<a name="l00067"></a>00067 {
<a name="l00068"></a>00068 <span class="keywordflow">if</span> ( <span class="keyword">const</span> Polygon *p=dynamic_cast<const Polygon *>(geom) )
<a name="l00069"></a>00069 {
<a name="l00070"></a>00070 comps.push_back(p);
<a name="l00071"></a>00071 }
<a name="l00072"></a>00072 }
<a name="l00073"></a>00073
<a name="l00074"></a>00074 <span class="keyword">private</span>:
<a name="l00075"></a>00075
<a name="l00077"></a>00077 std::vector<const Polygon*>& comps;
<a name="l00078"></a>00078
<a name="l00079"></a>00079 <span class="comment">// Declare type as noncopyable</span>
<a name="l00080"></a>00080 PolygonExtracter(<span class="keyword">const</span> PolygonExtracter& other);
<a name="l00081"></a>00081 PolygonExtracter& operator=(<span class="keyword">const</span> PolygonExtracter& rhs);
<a name="l00082"></a>00082 };
<a name="l00083"></a>00083
<a name="l00084"></a>00084 } <span class="comment">// namespace geos.geom.util</span>
<a name="l00085"></a>00085 } <span class="comment">// namespace geos.geom</span>
<a name="l00086"></a>00086 } <span class="comment">// namespace geos</span>
<a name="l00087"></a>00087
<a name="l00088"></a>00088 <span class="preprocessor">#endif</span>
<a name="l00089"></a>00089 <span class="preprocessor"></span>
<a name="l00090"></a>00090 <span class="comment">/**********************************************************************</span>
<a name="l00091"></a>00091 <span class="comment"> * $Log$</span>
<a name="l00092"></a>00092 <span class="comment"> * Revision 1.1 2006/03/09 16:46:49 strk</span>
<a name="l00093"></a>00093 <span class="comment"> * geos::geom namespace definition, first pass at headers split</span>
<a name="l00094"></a>00094 <span class="comment"> *</span>
<a name="l00095"></a>00095 <span class="comment"> **********************************************************************/</span>
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