git-svn-id: svn://scm.gforge.inria.fr/svnroot/paradiseo@88 331e1502-861f-0410-8da2-ba01fb791d7f

trunk/paradiseo-mo/tutorial/examples/tsp/src/graph.cpp

@@ -0,0 +1,80 @@
+// -*- 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> > dist ; // Distances Mat.
+
+  unsigned size () {
+    
+    return dist.size () ;
+  }
+
+  void computeDistances () {
+  
+    // Dim.
+    unsigned numCities = vectCoord.size () ;
+    dist.resize (numCities) ;
+    for (unsigned i = 0 ; i < dist.size () ; i ++)
+      dist [i].resize (numCities) ;
+    
+    // Computations.
+    for (unsigned i = 0 ; i < dist.size () ; i ++)
+      for (unsigned j = i + 1 ; j < dist.size () ; j ++) {
+	double distX = vectCoord [i].first - vectCoord [j].first ;
+	double distY = 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 num_vert ; 
+      
+      f >> num_vert ;
+      vectCoord.resize (num_vert) ;
+
+      for (unsigned 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 __from, unsigned __to) {
+    
+    return dist [__from] [__to] ;
+  }
+}
+
+