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<hr><h1>chain.cpp</h1><a href="chain_8cpp.html">Go to the documentation of this file.</a><div class="fragment"><pre>00001
00007 <font class="comment">/* Copyright, 2001 Nevrax Ltd.</font>
00008 <font class="comment"> *</font>
00009 <font class="comment"> * This file is part of NEVRAX NEL.</font>
00010 <font class="comment"> * NEVRAX NEL is free software; you can redistribute it and/or modify</font>
00011 <font class="comment"> * it under the terms of the GNU General Public License as published by</font>
00012 <font class="comment"> * the Free Software Foundation; either version 2, or (at your option)</font>
00013 <font class="comment"> * any later version.</font>
00014 <font class="comment"></font>
00015 <font class="comment"> * NEVRAX NEL is distributed in the hope that it will be useful, but</font>
00016 <font class="comment"> * WITHOUT ANY WARRANTY; without even the implied warranty of</font>
00017 <font class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU</font>
00018 <font class="comment"> * General Public License for more details.</font>
00019 <font class="comment"></font>
00020 <font class="comment"> * You should have received a copy of the GNU General Public License</font>
00021 <font class="comment"> * along with NEVRAX NEL; see the file COPYING. If not, write to the</font>
00022 <font class="comment"> * Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,</font>
00023 <font class="comment"> * MA 02111-1307, USA.</font>
00024 <font class="comment"> */</font>
00025
00026 <font class="preprocessor">#include "<a class="code" href="stdpacs_8h.html">stdpacs.h</a>"</font>
00027
00028 <font class="preprocessor">#include "<a class="code" href="chain_8h.html">pacs/chain.h</a>"</font>
00029
00030 <font class="keyword">using</font> <font class="keyword">namespace </font>std;
00031 <font class="keyword">using</font> <font class="keyword">namespace </font>NLMISC;
00032
00033
00034 <font class="comment">// Functions for vertices comparison.</font>
00035 <font class="comment">// total order relation</font>
<a name="l00036"></a><a class="code" href="chain_8cpp.html#a0">00036</a> <font class="keyword">static</font> <font class="keyword">inline</font> <font class="keywordtype">bool</font> <a class="code" href="chain_8cpp.html#a0">isStrictlyLess</a>(<font class="keyword">const</font> CVector &a, <font class="keyword">const</font> CVector &b)
00037 {
00038 <font class="keywordflow">if</font> (a.x < b.x) <font class="keywordflow">return</font> <font class="keyword">true</font>;
00039 <font class="keywordflow">if</font> (a.x > b.x) <font class="keywordflow">return</font> <font class="keyword">false</font>;
00040 <font class="keywordflow">if</font> (a.y < b.y) <font class="keywordflow">return</font> <font class="keyword">true</font>;
00041 <font class="keywordflow">if</font> (a.y > b.y) <font class="keywordflow">return</font> <font class="keyword">false</font>;
00042 <font class="keywordflow">if</font> (a.z < b.y) <font class="keywordflow">return</font> <font class="keyword">true</font>;
00043 <font class="keywordflow">return</font> <font class="keyword">false</font>;
00044 }
00045
<a name="l00046"></a><a class="code" href="chain_8cpp.html#a1">00046</a> <font class="keyword">static</font> <font class="keyword">inline</font> <font class="keywordtype">bool</font> <a class="code" href="chain_8cpp.html#a1">isStrictlyGreater</a>(<font class="keyword">const</font> CVector &a, <font class="keyword">const</font> CVector &b)
00047 {
00048 <font class="keywordflow">if</font> (a.x > b.x) <font class="keywordflow">return</font> <font class="keyword">true</font>;
00049 <font class="keywordflow">if</font> (a.x < b.x) <font class="keywordflow">return</font> <font class="keyword">false</font>;
00050 <font class="keywordflow">if</font> (a.y > b.y) <font class="keywordflow">return</font> <font class="keyword">true</font>;
00051 <font class="keywordflow">if</font> (a.y < b.y) <font class="keywordflow">return</font> <font class="keyword">false</font>;
00052 <font class="keywordflow">if</font> (a.z > b.y) <font class="keywordflow">return</font> <font class="keyword">true</font>;
00053 <font class="keywordflow">return</font> <font class="keyword">false</font>;
00054 }
00055
<a name="l00056"></a><a class="code" href="chain_8cpp.html#a2">00056</a> <font class="keyword">static</font> <font class="keyword">inline</font> <font class="keywordtype">bool</font> <a class="code" href="chain_8cpp.html#a2">isEqual</a>(<font class="keyword">const</font> CVector &a, <font class="keyword">const</font> CVector &b)
00057 {
00058 <font class="keywordflow">return</font> (a == b);
00059 }
00060
00061
00062 <font class="comment">// COrderedChain3f methods implementation</font>
00063
<a name="l00064"></a><a class="code" href="classNLPACS_1_1COrderedChain3f.html#a7">00064</a> <font class="keywordtype">void</font> <a class="code" href="classNLPACS_1_1COrderedChain3f.html#a7">NLPACS::COrderedChain3f::serial</a>(IStream &f)
00065 {
00066 <font class="comment">/*</font>
00067 <font class="comment"> Version 0:</font>
00068 <font class="comment"> - base version.</font>
00069 <font class="comment"> */</font>
00070 (void)f.serialVersion(0);
00071
00072 f.serialCont(<a class="code" href="classNLPACS_1_1COrderedChain3f.html#n0">_Vertices</a>);
00073 f.serial(<a class="code" href="classNLPACS_1_1COrderedChain3f.html#n1">_Forward</a>);
00074 f.serial(<a class="code" href="classNLPACS_1_1COrderedChain3f.html#n2">_ParentId</a>);
00075 f.serial(<a class="code" href="classNLPACS_1_1COrderedChain3f.html#n3">_IndexInParent</a>);
00076 }
00077
00078 <font class="comment">// end of COrderedChain3f methods implementation</font>
00079
00080 <font class="comment">// COrderedChain methods implementation</font>
00081
00082 <font class="comment">// translates the ordered chain by the vector translation</font>
<a name="l00083"></a><a class="code" href="classNLPACS_1_1COrderedChain.html#a8">00083</a> <font class="keywordtype">void</font> <a class="code" href="classNLPACS_1_1COrderedChain.html#a8">NLPACS::COrderedChain::translate</a>(<font class="keyword">const</font> CVector &translation)
00084 {
00085 uint i;
00086 CVector2s translat;
00087 translat.pack(translation);
00088 <font class="keywordflow">for</font> (i=0; i<<a class="code" href="classNLPACS_1_1COrderedChain.html#n0">_Vertices</a>.size(); ++i)
00089 <a class="code" href="classNLPACS_1_1COrderedChain.html#n0">_Vertices</a>[i] += translat;
00090 }
00091
00092 <font class="comment">//</font>
00093 <font class="keywordtype">void</font> <a class="code" href="classNLPACS_1_1COrderedChain.html#a11">NLPACS::COrderedChain::traverse</a>(sint from, sint to, <font class="keywordtype">bool</font> forward, vector<NLPACS::CVector2s> &path)<font class="keyword"> const</font>
00094 <font class="keyword"></font>{
00095 sint i;
00096 <font class="keywordflow">if</font> (forward)
00097 {
00098 <font class="keywordflow">if</font> (from < 0) from = 0;
00099 <font class="keywordflow">if</font> (to < 0) to = <a class="code" href="classNLPACS_1_1COrderedChain.html#n0">_Vertices</a>.size()-1;
00100
00101 <font class="keywordflow">for</font> (i=from+1; i<=to; ++i)
00102 path.push_back(<a class="code" href="classNLPACS_1_1COrderedChain.html#n0">_Vertices</a>[i]);
00103 }
00104 <font class="keywordflow">else</font>
00105 {
00106 <font class="keywordflow">if</font> (from < 0) from = <a class="code" href="classNLPACS_1_1COrderedChain.html#n0">_Vertices</a>.size()-2;
00107 <font class="keywordflow">if</font> (to < 0) to = -1;
00108
00109 <font class="keywordflow">for</font> (i=from; i>to; --i)
00110 path.push_back(<a class="code" href="classNLPACS_1_1COrderedChain.html#n0">_Vertices</a>[i]);
00111 }
00112 }
00113
00114 <font class="comment">//</font>
<a name="l00115"></a><a class="code" href="classNLPACS_1_1COrderedChain.html#a12">00115</a> <font class="keywordtype">float</font> <a class="code" href="classNLPACS_1_1COrderedChain.html#a12">NLPACS::COrderedChain::distance</a>(<font class="keyword">const</font> CVector &position)<font class="keyword"> const</font>
00116 <font class="keyword"></font>{
00117 <font class="keywordtype">float</font> minDist = 1.0e10f;
00118 uint i;
00119 CVector2f pos = CVector2f(position);
00120
00121 <font class="keywordflow">for</font> (i=0; i+1<<a class="code" href="classNLPACS_1_1COrderedChain.html#n0">_Vertices</a>.size(); ++i)
00122 {
00123 CVector2f a = <a class="code" href="classNLPACS_1_1COrderedChain.html#n0">_Vertices</a>[i].unpack(),
00124 b = <a class="code" href="classNLPACS_1_1COrderedChain.html#n0">_Vertices</a>[i+1].unpack();
00125
00126 CVector2f d = (b-a);
00127 <font class="keywordtype">float</font> len = d.norm();
00128 d /= len;
00129 CVector2f n = CVector2f(d.y, -d.x);
00130
00131 <font class="keywordtype">float</font> <a class="code" href="namespaceNLAISCRIPT.html#a20">l</a> = (pos-a)*d;
00132 <font class="keywordtype">float</font> dist;
00133
00134 <font class="keywordflow">if</font> (<a class="code" href="namespaceNLAISCRIPT.html#a20">l</a> < 0.0f)
00135 {
00136 dist = (pos-a).norm();
00137 }
00138 <font class="keywordflow">else</font> <font class="keywordflow">if</font> (<a class="code" href="namespaceNLAISCRIPT.html#a20">l</a> > len)
00139 {
00140 dist = (pos-b).norm();
00141 }
00142 <font class="keywordflow">else</font>
00143 {
00144 dist = (float)fabs((pos-a)*n);
00145 }
00146
00147 <font class="keywordflow">if</font> (dist < minDist)
00148 {
00149 minDist = dist;
00150 }
00151 }
00152
00153 <font class="keywordflow">return</font> minDist;
00154 }
00155
00156
00157 <font class="comment">// serialises the ordered chain</font>
<a name="l00158"></a><a class="code" href="classNLPACS_1_1COrderedChain.html#a13">00158</a> <font class="keywordtype">void</font> <a class="code" href="classNLPACS_1_1COrderedChain.html#a13">NLPACS::COrderedChain::serial</a>(IStream &f)
00159 {
00160 <font class="comment">/*</font>
00161 <font class="comment"> Version 0:</font>
00162 <font class="comment"> - base version.</font>
00163 <font class="comment"> Version 1:</font>
00164 <font class="comment"> - added _Min and _Max vectors</font>
00165 <font class="comment"> */</font>
00166 sint ver= f.serialVersion(1);
00167
00168 f.serialCont(<a class="code" href="classNLPACS_1_1COrderedChain.html#n0">_Vertices</a>);
00169 f.serial(<a class="code" href="classNLPACS_1_1COrderedChain.html#n1">_Forward</a>);
00170 f.serial(<a class="code" href="classNLPACS_1_1COrderedChain.html#n2">_ParentId</a>);
00171 f.serial(<a class="code" href="classNLPACS_1_1COrderedChain.html#n3">_IndexInParent</a>);
00172 f.serial(<a class="code" href="classNLPACS_1_1COrderedChain.html#n4">_Length</a>);
00173
00174 <font class="keywordflow">if</font> (ver >= 1)
00175 {
00176 f.serial(<a class="code" href="classNLPACS_1_1COrderedChain.html#n5">_Min</a>, <a class="code" href="classNLPACS_1_1COrderedChain.html#n6">_Max</a>);
00177 }
00178 <font class="keywordflow">else</font> <font class="keywordflow">if</font> (f.isReading() && !<a class="code" href="classNLPACS_1_1COrderedChain.html#n0">_Vertices</a>.empty())
00179 {
00180 uint i;
00181 <a class="code" href="classNLPACS_1_1COrderedChain.html#n6">_Max</a> = <a class="code" href="classNLPACS_1_1COrderedChain.html#n5">_Min</a> = <a class="code" href="classNLPACS_1_1COrderedChain.html#n0">_Vertices</a>[0];
00182 <font class="keywordflow">for</font> (i=1; i<<a class="code" href="classNLPACS_1_1COrderedChain.html#n0">_Vertices</a>.size(); ++i)
00183 {
00184 <a class="code" href="classNLPACS_1_1COrderedChain.html#n5">_Min</a>.minof(<a class="code" href="classNLPACS_1_1COrderedChain.html#n5">_Min</a>, <a class="code" href="classNLPACS_1_1COrderedChain.html#n0">_Vertices</a>[i]);
00185 <a class="code" href="classNLPACS_1_1COrderedChain.html#n6">_Max</a>.maxof(<a class="code" href="classNLPACS_1_1COrderedChain.html#n6">_Max</a>, <a class="code" href="classNLPACS_1_1COrderedChain.html#n0">_Vertices</a>[i]);
00186 }
00187 }
00188 }
00189
00190 <font class="comment">// end of COrderedChain methods implementation</font>
00191
00192
00193 <font class="comment">// CChain methods implementation</font>
00194
00195 <font class="comment">// builds the CChain from a list of vertices and a left and right surfaces id.</font>
00196 <font class="comment">// the chains vector is the vector where to store generated ordered chains.</font>
00197 <font class="comment">// thisId is the current id of the CChain, and edge is the number of the edge the CChain belongs to (-1</font>
00198 <font class="comment">// if none.)</font>
00199 <font class="keywordtype">void</font> <a class="code" href="classNLPACS_1_1CChain.html#b0">NLPACS::CChain::make</a>(<font class="keyword">const</font> vector<CVector> &vertices, sint32 left, sint32 right, vector<COrderedChain> &chains, uint16 thisId,
00200 vector<COrderedChain3f> &fullChains)
00201 {
00202 sint first = 0, last = 0, i;
00203
00204 _Left = left;
00205 _Right = right;
00206 <a class="code" href="classNLPACS_1_1COrderedChain.html#n4">_Length</a> = 0.0f;
00207
00208 <font class="comment">// splits the vertices list in ordered sub chains.</font>
00209 <font class="keywordflow">while</font> (first < (sint)vertices.size()-1)
00210 {
00211 last = first+1;
00212 <font class="keywordtype">bool</font> forward = <a class="code" href="chain_8cpp.html#a0">isStrictlyLess</a>(vertices[first], vertices[last]);
00213
00214 <font class="comment">// first checks if the subchain goes forward or backward.</font>
00215 <font class="keywordflow">if</font> (forward)
00216 <font class="keywordflow">for</font> (; last < (sint)vertices.size() && <a class="code" href="chain_8cpp.html#a0">isStrictlyLess</a>(vertices[last-1], vertices[last]); ++last)
00217 ;
00218 <font class="keywordflow">else</font>
00219 <font class="keywordflow">for</font> (; last < (sint)vertices.size() && <a class="code" href="chain_8cpp.html#a1">isStrictlyGreater</a>(vertices[last-1], vertices[last]); ++last)
00220 ;
00221 --last;
00222
00223 <font class="comment">// inserts the new subchain id within the CChain.</font>
00224 uint32 subChainId = chains.size();
00225 <font class="keywordflow">if</font> (subChainId > 65535)
00226 <a class="code" href="debug_8h.html#a3">nlerror</a>(<font class="stringliteral">"in NLPACS::CChain::make(): reached the maximum number of ordered chains"</font>);
00227 _SubChains.push_back((uint16)subChainId);
00228
00229 <font class="comment">// and creates a new COrderedChain</font>
00230 fullChains.resize(fullChains.size()+1);
00231 COrderedChain3f &subchain3f = fullChains.back();
00232 subchain3f._Vertices.reserve(last-first+1);
00233 subchain3f._Forward = forward;
00234 subchain3f._ParentId = thisId;
00235 subchain3f._IndexInParent = _SubChains.size()-1;
00236
00237 <font class="comment">// and then copies the vertices (sorted, btw!)</font>
00238 <font class="keywordflow">if</font> (forward)
00239 <font class="keywordflow">for</font> (i=first; i<=last; ++i)
00240 subchain3f._Vertices.push_back(vertices[i]);
00241 <font class="keywordflow">else</font>
00242 <font class="keywordflow">for</font> (i=last; i>=first; --i)
00243 subchain3f._Vertices.push_back(vertices[i]);
00244
00245 first = last;
00246
00247 chains.resize(chains.size()+1);
00248 COrderedChain &subchain = chains.back();
00249 subchain.pack(subchain3f);
00250 subchain.computeMinMax();
00251
00252 <font class="keywordtype">float</font> length = 0.0f;
00253 <font class="keywordflow">for</font> (i=0; i<(sint)subchain._Vertices.size()-1; ++i)
00254 length += (subchain._Vertices[i+1]-subchain._Vertices[i]).norm();
00255
00256 subchain._Length = length;
00257 <a class="code" href="classNLPACS_1_1COrderedChain.html#n4">_Length</a> += length;
00258 }
00259 }
00260
00261 <font class="comment">// serialises the CChain</font>
<a name="l00262"></a><a class="code" href="classNLPACS_1_1CChain.html#a14">00262</a> <font class="keywordtype">void</font> <a class="code" href="classNLPACS_1_1CChain.html#a14">NLPACS::CChain::serial</a>(IStream &f)
00263 {
00264 <font class="comment">/*</font>
00265 <font class="comment"> Version 0:</font>
00266 <font class="comment"> - base version.</font>
00267 <font class="comment"> */</font>
00268 (void)f.serialVersion(0);
00269
00270 f.serialCont(<a class="code" href="classNLPACS_1_1CChain.html#n0">_SubChains</a>);
00271 f.serial(<a class="code" href="classNLPACS_1_1CChain.html#n1">_Left</a>, <a class="code" href="classNLPACS_1_1CChain.html#n2">_Right</a>);
00272 f.serial(<a class="code" href="classNLPACS_1_1CChain.html#n3">_StartTip</a>, <a class="code" href="classNLPACS_1_1CChain.html#n4">_StopTip</a>);
00273 f.serial(<a class="code" href="classNLPACS_1_1CChain.html#n5">_Length</a>);
00274 f.serial(<a class="code" href="classNLPACS_1_1CChain.html#n6">_LeftLoop</a>, <a class="code" href="classNLPACS_1_1CChain.html#n7">_LeftLoopIndex</a>);
00275 f.serial(<a class="code" href="classNLPACS_1_1CChain.html#n8">_RightLoop</a>, <a class="code" href="classNLPACS_1_1CChain.html#n9">_RightLoopIndex</a>);
00276 }
00277
00278
00279
00280 <font class="comment">// unifiies the chain</font>
00281 <font class="keywordtype">void</font> <a class="code" href="classNLPACS_1_1CChain.html#b3">NLPACS::CChain::unify</a>(vector<NLPACS::COrderedChain> &ochains)
00282 {
00283 CVector2s snap;
00284 uint i;
00285
00286 snap = (ochains[<a class="code" href="classNLPACS_1_1CChain.html#n0">_SubChains</a>[0]].isForward()) ? ochains[<a class="code" href="classNLPACS_1_1CChain.html#n0">_SubChains</a>[0]]._Vertices.back() : ochains[<a class="code" href="classNLPACS_1_1CChain.html#n0">_SubChains</a>[0]]._Vertices.front();
00287
00288 <font class="keywordflow">for</font> (i=1; i<<a class="code" href="classNLPACS_1_1CChain.html#n0">_SubChains</a>.size(); ++i)
00289 {
00290 <font class="keywordflow">if</font> (ochains[<a class="code" href="classNLPACS_1_1CChain.html#n0">_SubChains</a>[i]].isForward())
00291 {
00292 <font class="keywordflow">if</font> (ochains[<a class="code" href="classNLPACS_1_1CChain.html#n0">_SubChains</a>[i]]._Vertices.front() != snap)
00293 <a class="code" href="debug_8h.html#a2">nlwarning</a>(<font class="stringliteral">"ochain %d and %d are not stuck together"</font>, <a class="code" href="classNLPACS_1_1CChain.html#n0">_SubChains</a>[i-1], <a class="code" href="classNLPACS_1_1CChain.html#n0">_SubChains</a>[i]);
00294 ochains[<a class="code" href="classNLPACS_1_1CChain.html#n0">_SubChains</a>[i]]._Vertices.front() = snap;
00295 snap = ochains[<a class="code" href="classNLPACS_1_1CChain.html#n0">_SubChains</a>[i]]._Vertices.back();
00296 }
00297 <font class="keywordflow">else</font>
00298 {
00299 <font class="keywordflow">if</font> (ochains[<a class="code" href="classNLPACS_1_1CChain.html#n0">_SubChains</a>[i]]._Vertices.back() != snap)
00300 <a class="code" href="debug_8h.html#a2">nlwarning</a>(<font class="stringliteral">"ochain %d and %d are not stuck together"</font>, <a class="code" href="classNLPACS_1_1CChain.html#n0">_SubChains</a>[i-1], <a class="code" href="classNLPACS_1_1CChain.html#n0">_SubChains</a>[i]);
00301 ochains[<a class="code" href="classNLPACS_1_1CChain.html#n0">_SubChains</a>[i]]._Vertices.back() = snap;
00302 snap = ochains[<a class="code" href="classNLPACS_1_1CChain.html#n0">_SubChains</a>[i]]._Vertices.front();
00303 }
00304 }
00305
00306 }
00307
00308 <font class="comment">//</font>
00309 <font class="keywordtype">void</font> <a class="code" href="classNLPACS_1_1CChain.html#b4">NLPACS::CChain::setStartVector</a>(<font class="keyword">const</font> <a class="code" href="classNLPACS_1_1CVector2s.html">NLPACS::CVector2s</a> &<a class="code" href="driver__opengl__extension__def_8h.html#a368">v</a>, vector<NLPACS::COrderedChain> &ochains)
00310 {
00311 <font class="keywordflow">if</font> (ochains[<a class="code" href="classNLPACS_1_1CChain.html#n0">_SubChains</a>.front()].isForward())
00312 ochains[<a class="code" href="classNLPACS_1_1CChain.html#n0">_SubChains</a>.front()]._Vertices.front() = v;
00313 <font class="keywordflow">else</font>
00314 ochains[<a class="code" href="classNLPACS_1_1CChain.html#n0">_SubChains</a>.front()]._Vertices.back() = v;
00315 }
00316
00317 <font class="comment">//</font>
00318 <font class="keywordtype">void</font> <a class="code" href="classNLPACS_1_1CChain.html#b5">NLPACS::CChain::setStopVector</a>(<font class="keyword">const</font> <a class="code" href="classNLPACS_1_1CVector2s.html">NLPACS::CVector2s</a> &<a class="code" href="driver__opengl__extension__def_8h.html#a368">v</a>, vector<NLPACS::COrderedChain> &ochains)
00319 {
00320 <font class="keywordflow">if</font> (ochains[<a class="code" href="classNLPACS_1_1CChain.html#n0">_SubChains</a>.back()].isForward())
00321 ochains[<a class="code" href="classNLPACS_1_1CChain.html#n0">_SubChains</a>.back()]._Vertices.back() = v;
00322 <font class="keywordflow">else</font>
00323 ochains[<a class="code" href="classNLPACS_1_1CChain.html#n0">_SubChains</a>.back()]._Vertices.front() = v;
00324 }
00325
00326 <font class="comment">//</font>
00327 <a class="code" href="classNLPACS_1_1CVector2s.html">NLPACS::CVector2s</a> <a class="code" href="classNLPACS_1_1CChain.html#b6">NLPACS::CChain::getStartVector</a>(vector<NLPACS::COrderedChain> &ochains)
00328 {
00329 <font class="keywordflow">if</font> (ochains[<a class="code" href="classNLPACS_1_1CChain.html#n0">_SubChains</a>.front()].isForward())
00330 <font class="keywordflow">return</font> ochains[<a class="code" href="classNLPACS_1_1CChain.html#n0">_SubChains</a>.front()]._Vertices.front();
00331 <font class="keywordflow">else</font>
00332 <font class="keywordflow">return</font> ochains[<a class="code" href="classNLPACS_1_1CChain.html#n0">_SubChains</a>.front()]._Vertices.back();
00333 }
00334
00335 <font class="comment">//</font>
00336 <a class="code" href="classNLPACS_1_1CVector2s.html">NLPACS::CVector2s</a> <a class="code" href="classNLPACS_1_1CChain.html#b7">NLPACS::CChain::getStopVector</a>(vector<NLPACS::COrderedChain> &ochains)
00337 {
00338 <font class="keywordflow">if</font> (ochains[<a class="code" href="classNLPACS_1_1CChain.html#n0">_SubChains</a>.back()].isForward())
00339 <font class="keywordflow">return</font> ochains[<a class="code" href="classNLPACS_1_1CChain.html#n0">_SubChains</a>.back()]._Vertices.back();
00340 <font class="keywordflow">else</font>
00341 <font class="keywordflow">return</font> ochains[<a class="code" href="classNLPACS_1_1CChain.html#n0">_SubChains</a>.back()]._Vertices.front();
00342 }
00343
00344 <font class="comment">// end of CChain methods implementation</font>
00345
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