Belle II Software  release-05-01-25
Distance2DXYSquared.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 <math.h>
15 
16 #define DISTANCE2DXYSQUARED_NAME Distance2DXYSquared
17 
18 namespace Belle2 {
25  template <typename PointType>
26  class DISTANCE2DXYSQUARED_NAME : public SelectionVariable< PointType , 2, double > {
27  public:
28 
31 
33  static double value(const PointType& outerHit, const PointType& innerHit)
34  {
35  return
36  std::pow(outerHit.X() - innerHit.X() , 2) +
37  std::pow(outerHit.Y() - innerHit.Y() , 2);
38  }
39  };
40 
42 }
Belle2::DISTANCE2DXYSQUARED_NAME::PUT_NAME_FUNCTION
PUT_NAME_FUNCTION(DISTANCE2DXYSQUARED_NAME)
is expanded as "static const std:string name(void)" frunction which returns name of the Class
Belle2::DISTANCE2DXYSQUARED_NAME
This is the specialization for SpacePoints with returning floats, where value calculates the squared ...
Definition: Distance2DXYSquared.h:26
Belle2
Abstract base class for different kinds of events.
Definition: MillepedeAlgorithm.h:19
Belle2::DISTANCE2DXYSQUARED_NAME::value
static double value(const PointType &outerHit, const PointType &innerHit)
calculates the squared distance between the hits (2D on the X-Y-plane), returning unit: cm^2 for spee...
Definition: Distance2DXYSquared.h:33
Belle2::SelectionVariable
Base class of the selection variable objects used for pair filtering.
Definition: SelectionVariable.h:54