ZIGGZAGGRZ_NAME< PointType, PointContainerType > Class Template Reference

checks whether chain of segments are zigg-zagging (changing sign of curvature of neighbouring segments) in the R-Z-plane, returns number of charge-signs found (if != 1, then the given hitContainer is ziggZagging). More...

#include <ZiggZaggRZ.h>

Inheritance diagram for ZIGGZAGGRZ_NAME< PointType, PointContainerType >:

Public Types
typedef int	variableType
	Type of the returned object.
typedef PointContainerType	argumentType
	Type of the argument object.
typedef FunctionOf< Nargs, variableType, constargumentType & >::functionType	functionType
	Type of the function returning the value.

Public Member Functions
	PUT_NAME_FUNCTION (ZIGGZAGGRZ_NAME)
	is replaced by "static const std:string name(void)" frunction which returns name of the Class

Static Public Member Functions
static int	value (const PointContainerType &hitContainer)
	checks whether chain of segments are zigg-zagging (changing sign of curvature of neighbouring segments) in the R-Z-plane, returns number of charge-signs found (if != 1, then the given hitContainer is ziggZagging)
static variableType	value (const PointContainerType &arg1, const PointContainerType &arg2)
	Static method that return the variable associated to:

Static Public Attributes
static const size_t	c_Nargs
	Number of arguments.

Detailed Description

template<typename PointType, typename PointContainerType>
class Belle2::ZIGGZAGGRZ_NAME< PointType, PointContainerType >

checks whether chain of segments are zigg-zagging (changing sign of curvature of neighbouring segments) in the R-Z-plane, returns number of charge-signs found (if != 1, then the given hitContainer is ziggZagging).

ATTENTION: in contrast to the Two- Three- and FourHit-filters, the TrackletFilters do NOT expect Hits, but a Container with pointers to Hits (e.g. Vector of hits or a SpacePointTrackCandidate, These filters therefore apply to arbitrary numbers of hits in that container.

Definition at line 33 of file ZiggZaggRZ.h.

Member Typedef Documentation

argumentType

typedef PointContainerType argumentType

inherited

Type of the argument object.

Needed for SFINAE in Filter.hh

Definition at line 84 of file SelectionVariable.h.

functionType

typedef FunctionOf<Nargs,variableType,constargumentType&>::functionType functionType

inherited

Type of the function returning the value.

Needed for the automated training

Definition at line 88 of file SelectionVariable.h.

variableType

typedef int variableType

inherited

Type of the returned object.

Needed for SFINAE in Filter.hh

Definition at line 81 of file SelectionVariable.h.

Member Function Documentation

value() [1/2]

static variableType value ( const PointContainerType &  arg1, const PointContainerType &  arg2  )

inlinestaticinherited

Static method that return the variable associated to:

Parameters

arg1	first object of the pair
arg2	second object of the pair

N.B. this method must be static.

value() [2/2]

static int value ( const PointContainerType &  hitContainer )

inlinestatic

checks whether chain of segments are zigg-zagging (changing sign of curvature of neighbouring segments) in the R-Z-plane, returns number of charge-signs found (if != 1, then the given hitContainer is ziggZagging)

Definition at line 40 of file ZiggZaggRZ.h.

    {
      const unsigned nHits = hitContainer.size();
      if (nHits < 4) return 1;
 
      typedef SelVarHelper<PointType, double> Helper;
      using boost::math::sign;
 
      std::vector<B2Vector3D> vecRZ;
      vecRZ.reserve(nHits);
      for (const auto* hit : hitContainer) { // collect RZ-Vrsions of the hits:
        vecRZ.push_back(B2Vector3D(Helper::calcPerp(*hit), hit->Z(), 0.));
      }
 
      std::vector<int> chargeSigns;
      chargeSigns.reserve(nHits - 2);
      for (unsigned i = 0; i < nHits - 2; ++i) {
        int signVal = sign((vecRZ.at(i + 1) - vecRZ.at(i + 2)).Orthogonal() * (vecRZ.at(i) - vecRZ.at(i + 1)));
        chargeSigns.push_back(signVal);
      }
 
      std::sort(chargeSigns.begin(), chargeSigns.end());
      auto newEnd = std::unique(chargeSigns.begin(), chargeSigns.end());
 
      return std::distance(chargeSigns.begin(), newEnd);
    } // return unit: none

Member Data Documentation

c_Nargs

const size_t c_Nargs

staticinherited

Number of arguments.

Definition at line 91 of file SelectionVariable.h.

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The documentation for this class was generated from the following file:

• tracking/trackFindingVXD/filterMap/trackletVariables/include/ZiggZaggRZ.h