Research:D0:cafe:top_cafe: topology variables in top_cafe package

We have lots of topological variables used: I have to remember them all :-(

00055   double TopTopologicalVariables::Centrality() const 
00056   {
00057     return Ht()/H(); 
00058   } // Centrality()
00059
00061     double TopTopologicalVariables::Aplanarity() const 
00062     {
00063       ensurePV();
00064       return 1.5 * (*_pv)[2]; // alternative syntax: ... * _pv->operator[](2)
00065     } // Aplanarity()
00066  
00068   double TopTopologicalVariables::Sphericity() const
00069   {
00070     ensurePV();
00071     return 1.5 * ( (*_pv)[2] + (*_pv)[1] );
00072   } // Sphericity()