Belle II Software  release-05-02-19
CosAngleXY.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 <framework/geometry/B2Vector3.h>
15 #include <cmath>
16 
17 #define COSANGLEXY_NAME CosAngleXY
18 
19 namespace Belle2 {
30  template <typename PointType >
31  class COSANGLEXY_NAME : public SelectionVariable< PointType , 3, double > {
32  public:
35 
36 
39  static double value(const PointType& outerHit, const PointType& centerHit, const PointType& innerHit)
40  {
41 
42  B2Vector3<double> outerVector(outerHit.X() - centerHit.X(), outerHit.Y() - centerHit.Y(), 0.);
43  B2Vector3<double> innerVector(centerHit.X() - innerHit.X(), centerHit.Y() - innerHit.Y(), 0.);
44 
45  double result = (outerVector.X() * innerVector.X() + outerVector.Y() * innerVector.Y()) / (outerVector.Perp() *
46  innerVector.Perp());
47 
48  return (std::isnan(result) || std::isinf(result)) ? double(0) : result;
49  } // return unit: none (calculation for degrees is incomplete, if you want readable numbers, use AngleXYFull instead)
50  };
51 
53 }
Belle2::B2Vector3::Perp
DataType Perp() const
The transverse component (R in cylindrical coordinate system).
Definition: B2Vector3.h:199
Belle2::COSANGLEXY_NAME::PUT_NAME_FUNCTION
PUT_NAME_FUNCTION(COSANGLEXY_NAME)
is replaced by "static const std:string name(void)" frunction which returns name of the Class
Belle2::B2Vector3< double >
Belle2
Abstract base class for different kinds of events.
Definition: MillepedeAlgorithm.h:19
Belle2::COSANGLEXY_NAME::value
static double value(const PointType &outerHit, const PointType &centerHit, const PointType &innerHit)
calculates the angle between the hits/vectors (XY), returning unit: none (calculation for degrees is ...
Definition: CosAngleXY.h:39
Belle2::SelectionVariable
Base class of the selection variable objects used for pair filtering.
Definition: SelectionVariable.h:54
Belle2::B2Vector3::X
DataType X() const
access variable X (= .at(0) without boundary check)
Definition: B2Vector3.h:430
Belle2::COSANGLEXY_NAME
calculates the angle between the hits/vectors (XY), returning unit: none (calculation for degrees is ...
Definition: CosAngleXY.h:31
Belle2::B2Vector3::Y
DataType Y() const
access variable Y (= .at(1) without boundary check)
Definition: B2Vector3.h:432