DeltaDistCircleCenter.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 <tracking/trackFindingVXD/filterMap/threeHitVariables/CircleCenterXY.h>
#include <framework/geometry/B2Vector3.h>
#include <math.h>
 
#define DELTADISTCIRCLECENTER_NAME DeltaDistCircleCenter
 
namespace Belle2 {
  template <typename PointType >
  class DELTADISTCIRCLECENTER_NAME : public SelectionVariable< PointType, 4, double > {
  public:
    PUT_NAME_FUNCTION(DELTADISTCIRCLECENTER_NAME);
 
 
 
    static double value(const PointType& outerHit, const PointType& outerCenterHit, const PointType& innerCenterHit,
                        const PointType& innerHit)
    {
 
      B2Vector3<double> outerCircleCenter = CircleCenterXY<PointType>::value(outerHit, outerCenterHit, innerCenterHit);
 
      B2Vector3<double> innerCircleCenter = CircleCenterXY<PointType>::value(outerCenterHit, innerCenterHit, innerHit);
 
      return fabs(outerCircleCenter.Perp() - innerCircleCenter.Perp());
    } // return unit: GeV/c
  };
 
}
//