Distance3DNormed.h

/**************************************************************************
 * basf2 (Belle II Analysis Software Framework)                           *
 * Author: The Belle II Collaboration                                     *
 *                                                                        *
 * See git log for contributors and copyright holders.                    *
 * This file is licensed under LGPL-3.0, see LICENSE.md.                  *
 **************************************************************************/
 
#pragma once
 
#include <tracking/trackFindingVXD/filterMap/filterFramework/SelectionVariable.h>
#include <cmath>
 
#define DISTANCE3DNORMED_NAME Distance3DNormed
namespace Belle2 {

  template <typename PointType >
  class DISTANCE3DNORMED_NAME : public SelectionVariable< PointType, 2, double > {
  public:

    PUT_NAME_FUNCTION(DISTANCE3DNORMED_NAME);
 
 

    static double value(const PointType& outerHit, const PointType& innerHit)
    {
 
      double result =
        (std::pow(outerHit.X() - innerHit.X(), 2)
         + std::pow(outerHit.Y() - innerHit.Y(), 2))
        /
        (std::pow(outerHit.X() - innerHit.X(), 2)
         + std::pow(outerHit.Y() - innerHit.Y(), 2)
         + std::pow(outerHit.Z() - innerHit.Z(), 2));
 
      return
        (std::isnan(result) || std::isinf(result)) ? 0 : result;
    }
 
 
  };

}