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<h1>order_xover.cpp</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">// -*- mode: c++; c-indent-level: 4; c++-member-init-indent: 8; comment-column: 35; -*-</span>
<a name="l00002"></a>00002
<a name="l00003"></a>00003 <span class="comment">// "order_xover.cpp"</span>
<a name="l00004"></a>00004
<a name="l00005"></a>00005 <span class="comment">// (c) OPAC Team, LIFL, 2002-2006</span>
<a name="l00006"></a>00006
<a name="l00007"></a>00007 <span class="comment">/* LICENCE TEXT</span>
<a name="l00008"></a>00008 <span class="comment"> </span>
<a name="l00009"></a>00009 <span class="comment"> Contact: paradiseo-help@lists.gforge.inria.fr</span>
<a name="l00010"></a>00010 <span class="comment">*/</span>
<a name="l00011"></a>00011
<a name="l00012"></a>00012 <span class="preprocessor">#include &lt;assert.h&gt;</span>
<a name="l00013"></a>00013 <span class="preprocessor">#include &lt;vector&gt;</span>
<a name="l00014"></a>00014
<a name="l00015"></a>00015 <span class="preprocessor">#include &lt;utils/eoRNG.h&gt;</span>
<a name="l00016"></a>00016
<a name="l00017"></a>00017 <span class="preprocessor">#include "order_xover.h"</span>
<a name="l00018"></a>00018 <span class="preprocessor">#include "route_valid.h"</span>
<a name="l00019"></a>00019
<a name="l00020"></a><a class="code" href="class_order_xover.html#d2bf90b5f46ac4a344777e17bc5f364d">00020</a> <span class="keywordtype">void</span> <a class="code" href="class_order_xover.html#d2bf90b5f46ac4a344777e17bc5f364d">OrderXover :: cross</a> (<span class="keyword">const</span> Route &amp; __par1, <span class="keyword">const</span> Route &amp; __par2, Route &amp; __child)
<a name="l00021"></a>00021 {
<a name="l00022"></a>00022
<a name="l00023"></a>00023 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> cut = rng.random (__par1.size ()) ;
<a name="l00024"></a>00024
<a name="l00025"></a>00025 <span class="comment">/* To store vertices that have</span>
<a name="l00026"></a>00026 <span class="comment"> already been crossed */</span>
<a name="l00027"></a>00027 std::vector&lt;bool&gt; v;
<a name="l00028"></a>00028 v.resize(__par1.size());
<a name="l00029"></a>00029
<a name="l00030"></a>00030 <span class="keywordflow">for</span> (<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> i = 0 ; i &lt; __par1.size () ; i ++)
<a name="l00031"></a>00031 {
<a name="l00032"></a>00032 v [i] = <span class="keyword">false</span> ;
<a name="l00033"></a>00033 }
<a name="l00034"></a>00034
<a name="l00035"></a>00035 <span class="comment">/* Copy of the left partial</span>
<a name="l00036"></a>00036 <span class="comment"> route of the first parent */</span>
<a name="l00037"></a>00037 <span class="keywordflow">for</span> (<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> i = 0 ; i &lt; cut ; i ++)
<a name="l00038"></a>00038 {
<a name="l00039"></a>00039 __child [i] = __par1 [i] ;
<a name="l00040"></a>00040 v [__par1 [i]] = true ;
<a name="l00041"></a>00041 }
<a name="l00042"></a>00042
<a name="l00043"></a>00043 <span class="comment">/* Searching the vertex of the second path, that ended</span>
<a name="l00044"></a>00044 <span class="comment"> the previous first one */</span>
<a name="l00045"></a>00045 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> from = 0 ;
<a name="l00046"></a>00046 <span class="keywordflow">for</span> (<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> i = 0 ; i &lt; __par2.size () ; i ++)
<a name="l00047"></a>00047 {
<a name="l00048"></a>00048 <span class="keywordflow">if</span> (__par2 [i] == __child [cut - 1])
<a name="l00049"></a>00049 {
<a name="l00050"></a>00050 from = i ;
<a name="l00051"></a>00051 break ;
<a name="l00052"></a>00052 }
<a name="l00053"></a>00053 }
<a name="l00054"></a>00054
<a name="l00055"></a>00055 <span class="comment">/* Selecting a direction</span>
<a name="l00056"></a>00056 <span class="comment"> Left or Right */</span>
<a name="l00057"></a>00057 <span class="keywordtype">char</span> direct = rng.flip () ? 1 : -1 ;
<a name="l00058"></a>00058
<a name="l00059"></a>00059 <span class="comment">/* Copy of the left vertices from</span>
<a name="l00060"></a>00060 <span class="comment"> the second parent path */</span>
<a name="l00061"></a>00061 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> l = cut ;
<a name="l00062"></a>00062
<a name="l00063"></a>00063 <span class="keywordflow">for</span> (<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> i = 0 ; i &lt; __par2.size () ; i ++)
<a name="l00064"></a>00064 {
<a name="l00065"></a>00065 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> bidule <span class="comment">/* :-) */</span> = (direct * i + from + __par2.size ()) % __par2.size () ;
<a name="l00066"></a>00066 <span class="keywordflow">if</span> (! v [__par2 [bidule]])
<a name="l00067"></a>00067 {
<a name="l00068"></a>00068 __child [l ++] = __par2 [bidule] ;
<a name="l00069"></a>00069 v [__par2 [bidule]] = true ;
<a name="l00070"></a>00070 }
<a name="l00071"></a>00071 }
<a name="l00072"></a>00072
<a name="l00073"></a>00073 v.clear();
<a name="l00074"></a>00074 }
<a name="l00075"></a>00075
<a name="l00076"></a><a class="code" href="class_order_xover.html#0ff6aada669eb8173322ed68cda1ac61">00076</a> <span class="keywordtype">bool</span> <a class="code" href="class_order_xover.html#0ff6aada669eb8173322ed68cda1ac61">OrderXover :: operator () </a>(Route &amp; __route1, Route &amp; __route2)
<a name="l00077"></a>00077 {
<a name="l00078"></a>00078
<a name="l00079"></a>00079 <span class="comment">// Init. copy</span>
<a name="l00080"></a>00080 Route par [2] ;
<a name="l00081"></a>00081 par [0] = __route1 ;
<a name="l00082"></a>00082 par [1] = __route2 ;
<a name="l00083"></a>00083
<a name="l00084"></a>00084 <a class="code" href="class_order_xover.html#d2bf90b5f46ac4a344777e17bc5f364d">cross</a> (par [0], par [1], __route1) ;
<a name="l00085"></a>00085 <a class="code" href="class_order_xover.html#d2bf90b5f46ac4a344777e17bc5f364d">cross</a> (par [1], par [0], __route2) ;
<a name="l00086"></a>00086
<a name="l00087"></a>00087 assert (valid (__route1)) ;
<a name="l00088"></a>00088 assert (valid (__route2)) ;
<a name="l00089"></a>00089
<a name="l00090"></a>00090 __route1.invalidate () ;
<a name="l00091"></a>00091 __route2.invalidate () ;
<a name="l00092"></a>00092
<a name="l00093"></a>00093 <span class="keywordflow">return</span> true ;
<a name="l00094"></a>00094 }
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