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git-svn-id: svn://scm.gforge.inria.fr/svnroot/paradiseo@512 331e1502-861f-0410-8da2-ba01fb791d7f
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jboisson 2007-07-04 14:05:19 +00:00
commit 61c0424eed
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trunk/paradiseo-mo/tutorial/examples/tsp/src/graph.cpp
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// -*- mode: c++; c-indent-level: 4; c++-member-init-indent: 8; comment-column: 35; -*-
// "graph.cpp"
// (c) OPAC Team, LIFL, 2003-2006
/* LICENCE TEXT
Contact: paradiseo-help@lists.gforge.inria.fr
*/
#include <fstream>
#include <iostream>
#include <math.h>
#include "graph.h"
namespace Graph {
static std :: vector <std :: pair <double, double> > vectCoord ; // Coordinates
static std :: vector <std :: vector <unsigned int> > dist ; // Distances Mat.
unsigned size ()
{
return dist.size () ;
}
void computeDistances ()
{
// Dim.
unsigned int numCities = vectCoord.size () ;
dist.resize (numCities) ;
for (unsigned int i = 0 ; i < dist.size () ; i ++)
{
dist [i].resize (numCities) ;
}
// Computations.
for (unsigned int i = 0 ; i < dist.size () ; i ++)
{
for (unsigned int j = i + 1 ; j < dist.size () ; j ++)
{
double distX = (double)(vectCoord [i].first - vectCoord [j].first) ;
double distY = (double)(vectCoord [i].second - vectCoord [j].second) ;
dist [i] [j] = dist [j] [i] = (unsigned) (sqrt ((float) (distX * distX + distY * distY)) + 0.5) ;
}
}
}
void load (const char * __fileName)
{
std :: ifstream f (__fileName) ;
std :: cout << ">> Loading [" << __fileName << "]" << std :: endl ;
if (f)
{
unsigned int num_vert ;
f >> num_vert ;
vectCoord.resize (num_vert) ;
for (unsigned int i = 0 ; i < num_vert ; i ++)
{
f >> vectCoord [i].first >> vectCoord [i].second ;
}
f.close () ;
computeDistances () ;
}
else
{
std :: cout << __fileName << " doesn't exist !!!" << std :: endl ;
// Bye !!!
exit (1) ;
}
}
float distance (unsigned int __from, unsigned int __to)
{
return (float)(dist [__from] [__to]) ;
}
}