--- trunk/OOPSE/libmdtools/Molecule.cpp	2003/07/30 21:17:01	657
+++ trunk/OOPSE/libmdtools/Molecule.cpp	2003/07/31 15:35:07	658
@@ -198,3 +198,19 @@ double Molecule::getCOMvel( double COMvel[3] ) {
   return mtot;
 
 }
+
+double Molecule::getTotalMass()
+{
+  int natoms;
+  Atom** atoms;
+  double totalMass;
+  
+  natoms = getNAtoms();
+  atoms = getMyAtoms();
+  totalMass = 0;
+  for(int i =0; i < natoms; i++){
+    totalMass += atoms[i]->getMass();
+  }
+
+  return totalMass;
+}