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<h1>LineSequencer.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: LineSequencer.h 2562 2009-06-08 15:28:27Z 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) 2006 Refractions Research Inc.</span>
<a name="l00008"></a>00008 <span class="comment"> *</span>
<a name="l00009"></a>00009 <span class="comment"> * This is free software; you can redistribute and/or modify it under</span>
<a name="l00010"></a>00010 <span class="comment"> * the terms of the GNU Lesser General Public Licence as published</span>
<a name="l00011"></a>00011 <span class="comment"> * by the Free Software Foundation. </span>
<a name="l00012"></a>00012 <span class="comment"> * See the COPYING file for more information.</span>
<a name="l00013"></a>00013 <span class="comment"> *</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"> * Last port: operation/linemerge/LineSequencer.java rev. 1.6 (JTS-1.10)</span>
<a name="l00017"></a>00017 <span class="comment"> *</span>
<a name="l00018"></a>00018 <span class="comment"> **********************************************************************/</span>
<a name="l00019"></a>00019
<a name="l00020"></a>00020 <span class="preprocessor">#ifndef GEOS_OP_LINEMERGE_LINESEQUENCER_H</span>
<a name="l00021"></a>00021 <span class="preprocessor"></span><span class="preprocessor">#define GEOS_OP_LINEMERGE_LINESEQUENCER_H</span>
<a name="l00022"></a>00022 <span class="preprocessor"></span>
<a name="l00023"></a>00023 <span class="preprocessor">#include <geos/export.h></span>
<a name="l00024"></a>00024
<a name="l00025"></a>00025 <span class="preprocessor">#include <geos/operation/linemerge/LineMergeGraph.h></span> <span class="comment">// for composition</span>
<a name="l00026"></a>00026 <span class="preprocessor">#include <geos/geom/Geometry.h></span> <span class="comment">// for inlines</span>
<a name="l00027"></a>00027 <span class="preprocessor">#include <geos/geom/LineString.h></span> <span class="comment">// for inlines</span>
<a name="l00028"></a>00028
<a name="l00029"></a>00029 <span class="preprocessor">#include <vector></span>
<a name="l00030"></a>00030 <span class="preprocessor">#include <list></span>
<a name="l00031"></a>00031 <span class="preprocessor">#include <memory></span> <span class="comment">// for auto_ptr</span>
<a name="l00032"></a>00032
<a name="l00033"></a>00033 <span class="comment">// Forward declarations </span>
<a name="l00034"></a>00034 <span class="keyword">namespace </span>geos {
<a name="l00035"></a>00035 <span class="keyword">namespace </span>geom {
<a name="l00036"></a>00036 <span class="keyword">class </span>GeometryFactory;
<a name="l00037"></a>00037 <span class="keyword">class </span>Geometry;
<a name="l00038"></a>00038 <span class="keyword">class </span>LineString;
<a name="l00039"></a>00039 }
<a name="l00040"></a>00040 <span class="keyword">namespace </span>planargraph {
<a name="l00041"></a>00041 <span class="keyword">class </span>DirectedEdge;
<a name="l00042"></a>00042 <span class="keyword">class </span>Subgraph;
<a name="l00043"></a>00043 <span class="keyword">class </span>Node;
<a name="l00044"></a>00044 }
<a name="l00045"></a>00045 }
<a name="l00046"></a>00046
<a name="l00047"></a>00047
<a name="l00048"></a>00048 <span class="keyword">namespace </span>geos {
<a name="l00049"></a>00049 <span class="keyword">namespace </span>operation { <span class="comment">// geos::operation</span>
<a name="l00050"></a>00050 <span class="keyword">namespace </span>linemerge { <span class="comment">// geos::operation::linemerge</span>
<a name="l00051"></a>00051
<a name="l00087"></a><a class="code" href="classgeos_1_1operation_1_1linemerge_1_1LineSequencer.html">00087</a> <span class="keyword">class </span>GEOS_DLL <a class="code" href="classgeos_1_1operation_1_1linemerge_1_1LineSequencer.html" title="Builds a sequence from a set of LineStrings so that they are ordered end to end.">LineSequencer</a> {
<a name="l00088"></a>00088
<a name="l00089"></a>00089 <span class="keyword">private</span>:
<a name="l00090"></a>00090 <span class="keyword">typedef</span> std::list<planargraph::DirectedEdge*> DirEdgeList;
<a name="l00091"></a>00091 <span class="keyword">typedef</span> std::vector< DirEdgeList* > Sequences;
<a name="l00092"></a>00092
<a name="l00093"></a>00093 <a class="code" href="classgeos_1_1operation_1_1linemerge_1_1LineMergeGraph.html" title="A planar graph of edges that is analyzed to sew the edges together.">LineMergeGraph</a> graph;
<a name="l00094"></a>00094 <span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1GeometryFactory.html" title="Supplies a set of utility methods for building Geometry objects from CoordinateSequence or other Geom...">geom::GeometryFactory</a> *factory;
<a name="l00095"></a>00095 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> lineCount;
<a name="l00096"></a>00096 <span class="keywordtype">bool</span> isRun;
<a name="l00097"></a>00097 std::auto_ptr<geom::Geometry> sequencedGeometry;
<a name="l00098"></a>00098 <span class="keywordtype">bool</span> isSequenceableVar;
<a name="l00099"></a>00099
<a name="l00100"></a>00100 <span class="keywordtype">void</span> addLine(<span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1LineString.html" title="Basic implementation of LineString.">geom::LineString</a> *lineString);
<a name="l00101"></a>00101 <span class="keywordtype">void</span> computeSequence();
<a name="l00102"></a>00102 Sequences* findSequences();
<a name="l00103"></a>00103 DirEdgeList* findSequence(<a class="code" href="classgeos_1_1planargraph_1_1Subgraph.html" title="A subgraph of a PlanarGraph.">planargraph::Subgraph</a>& graph);
<a name="l00104"></a>00104
<a name="l00106"></a>00106 <span class="keyword">static</span> <a class="code" href="classgeos_1_1geom_1_1LineString.html" title="Basic implementation of LineString.">geom::LineString</a>* reverse(<span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1LineString.html" title="Basic implementation of LineString.">geom::LineString</a> *line);
<a name="l00107"></a>00107
<a name="l00117"></a>00117 <a class="code" href="classgeos_1_1geom_1_1Geometry.html" title="Basic implementation of Geometry, constructed and destructed by GeometryFactory.">geom::Geometry</a>* buildSequencedGeometry(<span class="keyword">const</span> Sequences& sequences);
<a name="l00118"></a>00118
<a name="l00119"></a>00119 <span class="keyword">static</span> <span class="keyword">const</span> <a class="code" href="classgeos_1_1planargraph_1_1Node.html" title="A node in a PlanarGraph is a location where 0 or more Edge meet.">planargraph::Node</a>* findLowestDegreeNode(
<a name="l00120"></a>00120 <span class="keyword">const</span> <a class="code" href="classgeos_1_1planargraph_1_1Subgraph.html" title="A subgraph of a PlanarGraph.">planargraph::Subgraph</a>& graph);
<a name="l00121"></a>00121
<a name="l00122"></a>00122 <span class="keywordtype">void</span> addReverseSubpath(<span class="keyword">const</span> <a class="code" href="classgeos_1_1planargraph_1_1DirectedEdge.html" title="Represents a directed edge in a PlanarGraph.">planargraph::DirectedEdge</a> *de,
<a name="l00123"></a>00123 DirEdgeList& deList,
<a name="l00124"></a>00124 DirEdgeList::iterator lit,
<a name="l00125"></a>00125 <span class="keywordtype">bool</span> expectedClosed);
<a name="l00126"></a>00126
<a name="l00135"></a>00135 <span class="keyword">static</span> <span class="keyword">const</span> <a class="code" href="classgeos_1_1planargraph_1_1DirectedEdge.html" title="Represents a directed edge in a PlanarGraph.">planargraph::DirectedEdge</a>* findUnvisitedBestOrientedDE(
<a name="l00136"></a>00136 <span class="keyword">const</span> <a class="code" href="classgeos_1_1planargraph_1_1Node.html" title="A node in a PlanarGraph is a location where 0 or more Edge meet.">planargraph::Node</a>* node);
<a name="l00137"></a>00137
<a name="l00156"></a>00156 DirEdgeList* orient(DirEdgeList* seq);
<a name="l00157"></a>00157
<a name="l00166"></a>00166 DirEdgeList* reverse(DirEdgeList& seq);
<a name="l00167"></a>00167
<a name="l00175"></a>00175 <span class="keywordtype">bool</span> hasSequence(<a class="code" href="classgeos_1_1planargraph_1_1Subgraph.html" title="A subgraph of a PlanarGraph.">planargraph::Subgraph</a>& graph);
<a name="l00176"></a>00176
<a name="l00177"></a>00177 <span class="keyword">public</span>:
<a name="l00178"></a>00178
<a name="l00179"></a>00179 <a class="code" href="classgeos_1_1operation_1_1linemerge_1_1LineSequencer.html" title="Builds a sequence from a set of LineStrings so that they are ordered end to end.">LineSequencer</a>()
<a name="l00180"></a>00180 :
<a name="l00181"></a>00181 factory(0),
<a name="l00182"></a>00182 lineCount(0),
<a name="l00183"></a>00183 isRun(<span class="keyword">false</span>),
<a name="l00184"></a>00184 sequencedGeometry(0),
<a name="l00185"></a>00185 isSequenceableVar(<span class="keyword">false</span>)
<a name="l00186"></a>00186 {}
<a name="l00187"></a>00187
<a name="l00198"></a>00198 <span class="keyword">static</span> <span class="keywordtype">bool</span> isSequenced(<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="l00199"></a>00199
<a name="l00206"></a><a class="code" href="classgeos_1_1operation_1_1linemerge_1_1LineSequencer.html#a6f67bdb9cae41e922f385097864854a2">00206</a> <span class="keywordtype">bool</span> <a class="code" href="classgeos_1_1operation_1_1linemerge_1_1LineSequencer.html#a6f67bdb9cae41e922f385097864854a2">isSequenceable</a>() {
<a name="l00207"></a>00207 computeSequence();
<a name="l00208"></a>00208 <span class="keywordflow">return</span> isSequenceableVar;
<a name="l00209"></a>00209 }
<a name="l00210"></a>00210
<a name="l00219"></a><a class="code" href="classgeos_1_1operation_1_1linemerge_1_1LineSequencer.html#aa0b6aa09f7f894d46510d94b76eb07ba">00219</a> <span class="keywordtype">void</span> <a class="code" href="classgeos_1_1operation_1_1linemerge_1_1LineSequencer.html#aa0b6aa09f7f894d46510d94b76eb07ba">add</a>(<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>& geometry) {
<a name="l00220"></a>00220 geometry.<a class="code" href="classgeos_1_1geom_1_1Geometry.html#a558ac8159fcba50c602ce9a385005a6a" title="Apply a fiter to each component of this geometry. The filter is expected to provide a ...">applyComponentFilter</a>(*<span class="keyword">this</span>);
<a name="l00221"></a>00221 }
<a name="l00222"></a>00222
<a name="l00227"></a><a class="code" href="classgeos_1_1operation_1_1linemerge_1_1LineSequencer.html#aa869e231e53cda4dfbacd04eabbff7c0">00227</a> <span class="keywordtype">void</span> filter(<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>* g)
<a name="l00228"></a>00228 {
<a name="l00229"></a>00229 <span class="keywordflow">if</span> (<span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1LineString.html" title="Basic implementation of LineString.">geom::LineString</a> *ls=dynamic_cast<const geom::LineString *>(g))
<a name="l00230"></a>00230 {
<a name="l00231"></a>00231 addLine(ls);
<a name="l00232"></a>00232 }
<a name="l00233"></a>00233 }
<a name="l00234"></a>00234
<a name="l00244"></a>00244 <a class="code" href="classgeos_1_1geom_1_1Geometry.html" title="Basic implementation of Geometry, constructed and destructed by GeometryFactory.">geom::Geometry</a>*
<a name="l00245"></a><a class="code" href="classgeos_1_1operation_1_1linemerge_1_1LineSequencer.html#a40cd323835090fd35250b3aff87f95b6">00245</a> <a class="code" href="classgeos_1_1operation_1_1linemerge_1_1LineSequencer.html#a40cd323835090fd35250b3aff87f95b6">getSequencedLineStrings</a>(<span class="keywordtype">bool</span> release=1) {
<a name="l00246"></a>00246 computeSequence();
<a name="l00247"></a>00247 <span class="keywordflow">if</span> (release) <span class="keywordflow">return</span> sequencedGeometry.release();
<a name="l00248"></a>00248 <span class="keywordflow">else</span> <span class="keywordflow">return</span> sequencedGeometry.get();
<a name="l00249"></a>00249 }
<a name="l00250"></a>00250
<a name="l00251"></a>00251
<a name="l00252"></a>00252 };
<a name="l00253"></a>00253
<a name="l00254"></a>00254 } <span class="comment">// namespace geos::operation::linemerge</span>
<a name="l00255"></a>00255 } <span class="comment">// namespace geos::operation</span>
<a name="l00256"></a>00256 } <span class="comment">// namespace geos</span>
<a name="l00257"></a>00257
<a name="l00258"></a>00258 <span class="preprocessor">#endif // GEOS_OP_LINEMERGE_LINESEQUENCER_H</span>
<a name="l00259"></a>00259 <span class="preprocessor"></span>
<a name="l00260"></a>00260 <span class="comment">/**********************************************************************</span>
<a name="l00261"></a>00261 <span class="comment"> * $Log$</span>
<a name="l00262"></a>00262 <span class="comment"> * Revision 1.1 2006/03/22 10:13:53 strk</span>
<a name="l00263"></a>00263 <span class="comment"> * opLinemerge.h split</span>
<a name="l00264"></a>00264 <span class="comment"> *</span>
<a name="l00265"></a>00265 <span class="comment"> **********************************************************************/</span>
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