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<h1>OffsetCurveVertexList.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: OffsetCurveVertexList.h 2628 2009-09-27 20:43:03Z 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) 2007 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/buffer/OffsetCurveVertexList.java rev. 1.2 (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_BUFFER_OFFSETCURVEVERTEXLIST_H</span>
<a name="l00021"></a>00021 <span class="preprocessor"></span><span class="preprocessor">#define GEOS_OP_BUFFER_OFFSETCURVEVERTEXLIST_H</span>
<a name="l00022"></a>00022 <span class="preprocessor"></span>
<a name="l00023"></a>00023 <span class="preprocessor">#include <geos/geom/Coordinate.h></span> <span class="comment">// for inlines</span>
<a name="l00024"></a>00024 <span class="preprocessor">#include <geos/geom/CoordinateSequence.h></span> <span class="comment">// for inlines</span>
<a name="l00025"></a>00025 <span class="preprocessor">#include <geos/geom/CoordinateArraySequence.h></span> <span class="comment">// for composition</span>
<a name="l00026"></a>00026 <span class="preprocessor">#include <geos/geom/PrecisionModel.h></span> <span class="comment">// for inlines</span>
<a name="l00027"></a>00027
<a name="l00028"></a>00028 <span class="preprocessor">#include <vector></span>
<a name="l00029"></a>00029 <span class="preprocessor">#include <memory></span>
<a name="l00030"></a>00030
<a name="l00031"></a>00031 <span class="comment">// Forward declarations</span>
<a name="l00032"></a>00032 <span class="keyword">namespace </span>geos {
<a name="l00033"></a>00033 <span class="keyword">namespace </span>geom {
<a name="l00034"></a>00034 <span class="comment">//class CoordinateSequence;</span>
<a name="l00035"></a>00035 <span class="comment">//class PrecisionModel;</span>
<a name="l00036"></a>00036 }
<a name="l00037"></a>00037 }
<a name="l00038"></a>00038
<a name="l00039"></a>00039 <span class="keyword">namespace </span>geos {
<a name="l00040"></a>00040 <span class="keyword">namespace </span>operation { <span class="comment">// geos.operation</span>
<a name="l00041"></a>00041 <span class="keyword">namespace </span>buffer { <span class="comment">// geos.operation.buffer</span>
<a name="l00042"></a>00042
<a name="l00043"></a>00043 <span class="comment">// ---------------------------------------------</span>
<a name="l00044"></a>00044 <span class="comment">// OffsetCurveVertexList</span>
<a name="l00045"></a>00045 <span class="comment">// ---------------------------------------------</span>
<a name="l00046"></a>00046
<a name="l00048"></a>00048 <span class="comment">//</span>
<a name="l00051"></a><a class="code" href="classgeos_1_1operation_1_1buffer_1_1OffsetCurveVertexList.html">00051</a> <span class="comment"></span><span class="keyword">class </span><a class="code" href="classgeos_1_1operation_1_1buffer_1_1OffsetCurveVertexList.html" title="A list of the vertices in a constructed offset curve.">OffsetCurveVertexList</a>
<a name="l00052"></a>00052 {
<a name="l00053"></a>00053
<a name="l00054"></a>00054 <span class="keyword">private</span>:
<a name="l00055"></a>00055
<a name="l00056"></a>00056 <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>* ptList;
<a name="l00057"></a>00057
<a name="l00058"></a>00058 <span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1PrecisionModel.html" title="Specifies the precision model of the Coordinate in a Geometry.">geom::PrecisionModel</a>* precisionModel;
<a name="l00059"></a>00059
<a name="l00066"></a>00066 <span class="keywordtype">double</span> minimumVertexDistance;
<a name="l00067"></a>00067
<a name="l00075"></a>00075 <span class="keywordtype">bool</span> isDuplicate(<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>& pt)
<a name="l00076"></a>00076 {
<a name="l00077"></a>00077 <span class="keywordflow">if</span> (ptList->size() < 1)
<a name="l00078"></a>00078 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00079"></a>00079 <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>& lastPt = ptList-><a class="code" href="classgeos_1_1geom_1_1CoordinateSequence.html#a931a4baa65571e31e720c8d8d9390e31" title="Return last Coordinate in the sequence.">back</a>();
<a name="l00080"></a>00080 <span class="keywordtype">double</span> ptDist = pt.<a class="code" href="classgeos_1_1geom_1_1Coordinate.html#a9a30687133579e261178d099a238ef19">distance</a>(lastPt);
<a name="l00081"></a>00081 <span class="keywordflow">if</span> (ptDist < minimumVertexDistance)
<a name="l00082"></a>00082 <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00083"></a>00083 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00084"></a>00084 }
<a name="l00085"></a>00085
<a name="l00086"></a>00086
<a name="l00087"></a>00087 <span class="keyword">public</span>:
<a name="l00088"></a>00088
<a name="l00089"></a>00089 <span class="keyword">friend</span> std::ostream& operator<< (std::ostream& os, <span class="keyword">const</span> <a class="code" href="classgeos_1_1operation_1_1buffer_1_1OffsetCurveVertexList.html" title="A list of the vertices in a constructed offset curve.">OffsetCurveVertexList</a>& node);
<a name="l00090"></a>00090
<a name="l00091"></a>00091 <a class="code" href="classgeos_1_1operation_1_1buffer_1_1OffsetCurveVertexList.html" title="A list of the vertices in a constructed offset curve.">OffsetCurveVertexList</a>()
<a name="l00092"></a>00092 :
<a name="l00093"></a>00093 ptList(<span class="keyword">new</span> <a class="code" href="classgeos_1_1geom_1_1CoordinateArraySequence.html" title="The default implementation of CoordinateSequence.">geom::CoordinateArraySequence</a>()),
<a name="l00094"></a>00094 precisionModel(NULL),
<a name="l00095"></a>00095 minimumVertexDistance (0.0)
<a name="l00096"></a>00096 {
<a name="l00097"></a>00097 }
<a name="l00098"></a>00098
<a name="l00099"></a>00099 ~<a class="code" href="classgeos_1_1operation_1_1buffer_1_1OffsetCurveVertexList.html" title="A list of the vertices in a constructed offset curve.">OffsetCurveVertexList</a>()
<a name="l00100"></a>00100 {
<a name="l00101"></a>00101 <span class="keyword">delete</span> ptList;
<a name="l00102"></a>00102 }
<a name="l00103"></a>00103
<a name="l00104"></a>00104 <span class="keywordtype">void</span> setPrecisionModel(<span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1PrecisionModel.html" title="Specifies the precision model of the Coordinate in a Geometry.">geom::PrecisionModel</a>* nPrecisionModel)
<a name="l00105"></a>00105 {
<a name="l00106"></a>00106 precisionModel = nPrecisionModel;
<a name="l00107"></a>00107 }
<a name="l00108"></a>00108
<a name="l00109"></a>00109 <span class="keywordtype">void</span> setMinimumVertexDistance(<span class="keywordtype">double</span> nMinVertexDistance)
<a name="l00110"></a>00110 {
<a name="l00111"></a>00111 minimumVertexDistance = nMinVertexDistance;
<a name="l00112"></a>00112 }
<a name="l00113"></a>00113
<a name="l00114"></a>00114 <span class="keywordtype">void</span> addPt(<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>& pt)
<a name="l00115"></a>00115 {
<a name="l00116"></a>00116 assert(precisionModel);
<a name="l00117"></a>00117
<a name="l00118"></a>00118 <a class="code" href="classgeos_1_1geom_1_1Coordinate.html" title="Coordinate is the lightweight class used to store coordinates.">geom::Coordinate</a> bufPt = pt;
<a name="l00119"></a>00119 precisionModel-><a class="code" href="classgeos_1_1geom_1_1PrecisionModel.html#ac93fddf641db2575293d8987b75053af" title="Rounds a numeric value to the PrecisionModel grid.">makePrecise</a>(bufPt);
<a name="l00120"></a>00120 <span class="comment">// don't add duplicate (or near-duplicate) points</span>
<a name="l00121"></a>00121 <span class="keywordflow">if</span> (isDuplicate(bufPt))
<a name="l00122"></a>00122 {
<a name="l00123"></a>00123 <span class="keywordflow">return</span>;
<a name="l00124"></a>00124 }
<a name="l00125"></a>00125 <span class="comment">// we ask to allow repeated as we checked this ourself</span>
<a name="l00126"></a>00126 <span class="comment">// (JTS uses a vector for ptList, not a CoordinateSequence,</span>
<a name="l00127"></a>00127 <span class="comment">// we should do the same)</span>
<a name="l00128"></a>00128 ptList-><a class="code" href="classgeos_1_1geom_1_1CoordinateSequence.html#a22f1fddbe6697f8ceae08e6a3b08d63d" title="Add an array of coordinates.">add</a>(bufPt, <span class="keyword">true</span>);
<a name="l00129"></a>00129 }
<a name="l00130"></a>00130
<a name="l00132"></a>00132 <span class="comment">//</span>
<a name="l00134"></a><a class="code" href="classgeos_1_1operation_1_1buffer_1_1OffsetCurveVertexList.html#ae404ff6343ef51db76d0482249197a20">00134</a> <span class="comment"></span> <span class="keywordtype">void</span> <a class="code" href="classgeos_1_1operation_1_1buffer_1_1OffsetCurveVertexList.html#ae404ff6343ef51db76d0482249197a20" title="Check that points are a ring.">closeRing</a>()
<a name="l00135"></a>00135 {
<a name="l00136"></a>00136 <span class="keywordflow">if</span> (ptList->size() < 1) <span class="keywordflow">return</span>;
<a name="l00137"></a>00137 <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>& startPt = ptList-><a class="code" href="classgeos_1_1geom_1_1CoordinateSequence.html#a70939ed2369aefcef44c6c8c6e5fbce1" title="Return first Coordinate in the sequence.">front</a>();
<a name="l00138"></a>00138 <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>& lastPt = ptList-><a class="code" href="classgeos_1_1geom_1_1CoordinateSequence.html#a931a4baa65571e31e720c8d8d9390e31" title="Return last Coordinate in the sequence.">back</a>();
<a name="l00139"></a>00139 <span class="keywordflow">if</span> (startPt.<a class="code" href="classgeos_1_1geom_1_1Coordinate.html#afb42140c4c88c2d91d9ec231b6d08b21" title="2D only">equals</a>(lastPt)) <span class="keywordflow">return</span>;
<a name="l00140"></a>00140 <span class="comment">// we ask to allow repeated as we checked this ourself</span>
<a name="l00141"></a>00141 ptList-><a class="code" href="classgeos_1_1geom_1_1CoordinateSequence.html#a22f1fddbe6697f8ceae08e6a3b08d63d" title="Add an array of coordinates.">add</a>(startPt, <span class="keyword">true</span>);
<a name="l00142"></a>00142 }
<a name="l00143"></a>00143
<a name="l00145"></a>00145 <span class="comment">//</span>
<a name="l00152"></a><a class="code" href="classgeos_1_1operation_1_1buffer_1_1OffsetCurveVertexList.html#a32773460c005c47b76745cc540c58a2e">00152</a> <span class="comment"></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>* <a class="code" href="classgeos_1_1operation_1_1buffer_1_1OffsetCurveVertexList.html#a32773460c005c47b76745cc540c58a2e" title="Get coordinates by taking ownership of them.">getCoordinates</a>()
<a name="l00153"></a>00153 {
<a name="l00154"></a>00154 <a class="code" href="classgeos_1_1operation_1_1buffer_1_1OffsetCurveVertexList.html#ae404ff6343ef51db76d0482249197a20" title="Check that points are a ring.">closeRing</a>();
<a name="l00155"></a>00155 <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>* ret = ptList;
<a name="l00156"></a>00156 ptList = 0;
<a name="l00157"></a>00157 <span class="keywordflow">return</span> ret;
<a name="l00158"></a>00158 }
<a name="l00159"></a>00159
<a name="l00160"></a>00160 <span class="keyword">inline</span> <span class="keywordtype">int</span> size()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> ptList ? ptList->size() : 0 ; }
<a name="l00161"></a>00161
<a name="l00162"></a>00162 };
<a name="l00163"></a>00163
<a name="l00164"></a>00164 std::ostream& operator<< (std::ostream& os, <span class="keyword">const</span> OffsetCurveVertexList& lst)
<a name="l00165"></a>00165 {
<a name="l00166"></a>00166 <span class="keywordflow">if</span> ( lst.ptList )
<a name="l00167"></a>00167 {
<a name="l00168"></a>00168 os << *(lst.ptList);
<a name="l00169"></a>00169 }
<a name="l00170"></a>00170 <span class="keywordflow">else</span>
<a name="l00171"></a>00171 {
<a name="l00172"></a>00172 os << <span class="stringliteral">"empty (consumed?)"</span>;
<a name="l00173"></a>00173 }
<a name="l00174"></a>00174 <span class="keywordflow">return</span> os;
<a name="l00175"></a>00175 }
<a name="l00176"></a>00176
<a name="l00177"></a>00177 } <span class="comment">// namespace geos.operation.buffer</span>
<a name="l00178"></a>00178 } <span class="comment">// namespace geos.operation</span>
<a name="l00179"></a>00179 } <span class="comment">// namespace geos</span>
<a name="l00180"></a>00180
<a name="l00181"></a>00181
<a name="l00182"></a>00182 <span class="preprocessor">#endif // ndef GEOS_OP_BUFFER_OFFSETCURVEVERTEXLIST_H</span>
<a name="l00183"></a>00183 <span class="preprocessor"></span>
<a name="l00184"></a>00184 <span class="comment">/**********************************************************************</span>
<a name="l00185"></a>00185 <span class="comment"> * $Log$</span>
<a name="l00186"></a>00186 <span class="comment"> **********************************************************************/</span>
<a name="l00187"></a>00187
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