Belle II Software  release-05-01-25
DeltaDistCircleCenter.h
1 /**************************************************************************
2 * BASF2 (Belle Analysis Framework 2) *
3 * Copyright(C) 2014 - Belle II Collaboration *
4 * *
5 * Author: The Belle II Collaboration *
6 * Contributors: Jakob Lettenbichler (jakob.lettenbichler@oeaw.ac.at) *
7 * *
8 * This software is provided "as is" without any warranty. *
9 **************************************************************************/
10 
11 #pragma once
12 
13 #include <tracking/trackFindingVXD/filterMap/filterFramework/SelectionVariable.h>
14 #include <tracking/trackFindingVXD/filterMap/threeHitVariables/CircleCenterXY.h>
15 #include <framework/geometry/B2Vector3.h>
16 #include <math.h>
17 
18 #define DELTADISTCIRCLECENTER_NAME DeltaDistCircleCenter
19 
20 namespace Belle2 {
28  template <typename PointType >
29  class DELTADISTCIRCLECENTER_NAME : public SelectionVariable< PointType , 4, double > {
30  public:
33 
34 
35 
37  static double value(const PointType& outerHit, const PointType& outerCenterHit, const PointType& innerCenterHit,
38  const PointType& innerHit)
39  {
40 
41  B2Vector3<double> outerCircleCenter = CircleCenterXY<PointType>::value(outerHit, outerCenterHit, innerCenterHit);
42 
43  B2Vector3<double> innerCircleCenter = CircleCenterXY<PointType>::value(outerCenterHit, innerCenterHit, innerHit);
44 
45  return fabs(outerCircleCenter.Perp() - innerCircleCenter.Perp());
46  } // return unit: GeV/c
47  };
48 
50 }
51 //
Belle2::B2Vector3::Perp
DataType Perp() const
The transverse component (R in cylindrical coordinate system).
Definition: B2Vector3.h:199
Belle2::B2Vector3< double >
Belle2
Abstract base class for different kinds of events.
Definition: MillepedeAlgorithm.h:19
Belle2::SelectionVariable
Base class of the selection variable objects used for pair filtering.
Definition: SelectionVariable.h:54
Belle2::DELTADISTCIRCLECENTER_NAME::value
static double value(const PointType &outerHit, const PointType &outerCenterHit, const PointType &innerCenterHit, const PointType &innerHit)
calculates the distance between the estimated circle centers (using 2 subsets of given hits) in the x...
Definition: DeltaDistCircleCenter.h:37
Belle2::DELTADISTCIRCLECENTER_NAME::PUT_NAME_FUNCTION
PUT_NAME_FUNCTION(DELTADISTCIRCLECENTER_NAME)
is replaced by "static const std:string name(void)" frunction which returns name of the Class
Belle2::DELTADISTCIRCLECENTER_NAME
calculates the distance between the estimated circle centers (using 2 subsets of given hits) in the x...
Definition: DeltaDistCircleCenter.h:29