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<h1>LineStringSnapper.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: LineStringSnapper.h 2809 2009-12-06 01:05:24Z 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) 2009 Sandro Santilli <strk@keybit.net></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 <span class="comment"> *</span>
<a name="l00017"></a>00017 <span class="comment"> * Last port: operation/overlay/snap/lineStringSnapper.java rev 1.5 (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 <span class="preprocessor">#ifndef GEOS_OP_OVERLAY_SNAP_LINESTRINGSNAPPER_H</span>
<a name="l00022"></a>00022 <span class="preprocessor"></span><span class="preprocessor">#define GEOS_OP_OVERLAY_SNAP_LINESTRINGSNAPPER_H</span>
<a name="l00023"></a>00023 <span class="preprocessor"></span>
<a name="l00024"></a>00024 <span class="preprocessor">#include <geos/geom/Coordinate.h></span>
<a name="l00025"></a>00025 <span class="preprocessor">#include <geos/geom/CoordinateSequence.h></span>
<a name="l00026"></a>00026 <span class="preprocessor">#include <geos/geom/CoordinateList.h></span>
<a name="l00027"></a>00027
<a name="l00028"></a>00028 <span class="preprocessor">#include <memory></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="comment">//class PrecisionModel;</span>
<a name="l00034"></a>00034 <span class="comment">//class CoordinateSequence;</span>
<a name="l00035"></a>00035 <span class="keyword">class </span>CoordinateList;
<a name="l00036"></a>00036 <span class="keyword">class </span>Geometry;
<a name="l00037"></a>00037 }
<a name="l00038"></a>00038 }
<a name="l00039"></a>00039
<a name="l00040"></a>00040 <span class="keyword">namespace </span>geos {
<a name="l00041"></a>00041 <span class="keyword">namespace </span>operation { <span class="comment">// geos::operation</span>
<a name="l00042"></a>00042 <span class="keyword">namespace </span>overlay { <span class="comment">// geos::operation::overlay</span>
<a name="l00043"></a>00043 <span class="keyword">namespace </span>snap { <span class="comment">// geos::operation::overlay::snap</span>
<a name="l00044"></a>00044
<a name="l00052"></a><a class="code" href="classgeos_1_1operation_1_1overlay_1_1snap_1_1LineStringSnapper.html">00052</a> <span class="keyword">class </span>GEOS_DLL <a class="code" href="classgeos_1_1operation_1_1overlay_1_1snap_1_1LineStringSnapper.html" title="Snaps the vertices and segments of a LineString to a set of target snap vertices.">LineStringSnapper</a> {
<a name="l00053"></a>00053
<a name="l00054"></a>00054 <span class="keyword">public</span>:
<a name="l00055"></a>00055
<a name="l00063"></a><a class="code" href="classgeos_1_1operation_1_1overlay_1_1snap_1_1LineStringSnapper.html#ac1ed05effa3c85f646a7be278f460fdc">00063</a> <a class="code" href="classgeos_1_1operation_1_1overlay_1_1snap_1_1LineStringSnapper.html" title="Snaps the vertices and segments of a LineString to a set of target snap vertices.">LineStringSnapper</a>(<span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1Coordinate.html#a59345d3a409b5d2ebe01fcfcdcca92cb" title="A vector of Coordinate objects (real object, not pointers).">geom::Coordinate::Vect</a>& nSrcPts,
<a name="l00064"></a>00064 <span class="keywordtype">double</span> nSnapTol)
<a name="l00065"></a>00065 :
<a name="l00066"></a>00066 srcPts(nSrcPts),
<a name="l00067"></a>00067 snapTolerance(nSnapTol)
<a name="l00068"></a>00068 {
<a name="l00069"></a>00069 <span class="keywordtype">size_t</span> s = srcPts.size();
<a name="l00070"></a>00070 isClosed = ( s < 2 || srcPts[0].equals2D(srcPts[s-1]) );
<a name="l00071"></a>00071 }
<a name="l00072"></a>00072
<a name="l00073"></a>00073 <span class="comment">// Snap points are assumed to be all distinct points (a set would be better, uh ?)</span>
<a name="l00074"></a>00074 std::auto_ptr<geom::Coordinate::Vect> snapTo(<span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1Coordinate.html#a1735d833ea7d033b82c317f883948525" title="A vector of const Coordinate pointers.">geom::Coordinate::ConstVect</a>& snapPts);
<a name="l00075"></a>00075
<a name="l00076"></a>00076 <span class="keyword">private</span>:
<a name="l00077"></a>00077
<a name="l00078"></a>00078 <span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1Coordinate.html#a59345d3a409b5d2ebe01fcfcdcca92cb" title="A vector of Coordinate objects (real object, not pointers).">geom::Coordinate::Vect</a>& srcPts;
<a name="l00079"></a>00079
<a name="l00080"></a>00080 <span class="keywordtype">double</span> snapTolerance;
<a name="l00081"></a>00081
<a name="l00082"></a>00082 <span class="keywordtype">bool</span> isClosed;
<a name="l00083"></a>00083
<a name="l00084"></a>00084
<a name="l00085"></a>00085 <span class="comment">// Modifies first arg</span>
<a name="l00086"></a>00086 <span class="keywordtype">void</span> snapVertices(<a class="code" href="classgeos_1_1geom_1_1CoordinateList.html">geom::CoordinateList</a>& srcCoords,
<a name="l00087"></a>00087 <span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1Coordinate.html#a1735d833ea7d033b82c317f883948525" title="A vector of const Coordinate pointers.">geom::Coordinate::ConstVect</a>& snapPts);
<a name="l00088"></a>00088
<a name="l00089"></a>00089
<a name="l00090"></a>00090 <span class="comment">// Returns snapPts.end() if no snap point is close enough (within snapTol distance)</span>
<a name="l00091"></a>00091 geom::Coordinate::ConstVect::const_iterator findSnapForVertex(<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="l00092"></a>00092 <span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1Coordinate.html#a1735d833ea7d033b82c317f883948525" title="A vector of const Coordinate pointers.">geom::Coordinate::ConstVect</a>& snapPts);
<a name="l00093"></a>00093
<a name="l00094"></a>00094 <span class="comment">// Modifies first arg</span>
<a name="l00095"></a>00095 <span class="keywordtype">void</span> snapSegments(<a class="code" href="classgeos_1_1geom_1_1CoordinateList.html">geom::CoordinateList</a>& srcCoords,
<a name="l00096"></a>00096 <span class="keyword">const</span> <a class="code" href="classgeos_1_1geom_1_1Coordinate.html#a1735d833ea7d033b82c317f883948525" title="A vector of const Coordinate pointers.">geom::Coordinate::ConstVect</a>& snapPts);
<a name="l00097"></a>00097
<a name="l00101"></a>00101 <span class="comment">//</span>
<a name="l00119"></a>00119 <span class="comment"></span> geom::CoordinateList::iterator findSegmentToSnap(
<a name="l00120"></a>00120 <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>& snapPt,
<a name="l00121"></a>00121 geom::CoordinateList::iterator from,
<a name="l00122"></a>00122 geom::CoordinateList::iterator too_far);
<a name="l00123"></a>00123
<a name="l00124"></a>00124 <span class="comment">// Declare type as noncopyable</span>
<a name="l00125"></a>00125 <a class="code" href="classgeos_1_1operation_1_1overlay_1_1snap_1_1LineStringSnapper.html" title="Snaps the vertices and segments of a LineString to a set of target snap vertices.">LineStringSnapper</a>(<span class="keyword">const</span> <a class="code" href="classgeos_1_1operation_1_1overlay_1_1snap_1_1LineStringSnapper.html" title="Snaps the vertices and segments of a LineString to a set of target snap vertices.">LineStringSnapper</a>& other);
<a name="l00126"></a>00126 <a class="code" href="classgeos_1_1operation_1_1overlay_1_1snap_1_1LineStringSnapper.html" title="Snaps the vertices and segments of a LineString to a set of target snap vertices.">LineStringSnapper</a>& operator=(<span class="keyword">const</span> <a class="code" href="classgeos_1_1operation_1_1overlay_1_1snap_1_1LineStringSnapper.html" title="Snaps the vertices and segments of a LineString to a set of target snap vertices.">LineStringSnapper</a>& rhs);
<a name="l00127"></a>00127 };
<a name="l00128"></a>00128
<a name="l00129"></a>00129
<a name="l00130"></a>00130 } <span class="comment">// namespace geos::operation::overlay::snap</span>
<a name="l00131"></a>00131 } <span class="comment">// namespace geos::operation::overlay</span>
<a name="l00132"></a>00132 } <span class="comment">// namespace geos::operation</span>
<a name="l00133"></a>00133 } <span class="comment">// namespace geos</span>
<a name="l00134"></a>00134
<a name="l00135"></a>00135 <span class="preprocessor">#endif // GEOS_OP_OVERLAY_SNAP_LINESTRINGSNAPPER_H</span>
<a name="l00136"></a>00136 <span class="preprocessor"></span>
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