Phi0BinsSpec Class Reference

Strategy to construct discrete phi0 points from discrete overlap specifications. More...

#include <Phi0Rep.h>

Public Member Functions
	Phi0BinsSpec (long nBins, int nOverlap, int nWidth)
	Constructor from fixed number of accessible bins and overlap specification in discrete number of positions.
DiscretePhi0::Array	constructArray () const
	Construct the array of discrete phi0 positions.
long	getNPositions () const
	Getter for the number of bounds.
double	getBinWidth () const
	Getter for the bin width in real phi0 to investigate the value that results from the discrete overlap specification.
double	getOverlap () const
	Getter for the overlap in real phi0 to investigate the value that results from the discrete overlap specification.
int	getNOverlap () const
	Getter for the overlap in discrete number of positions.

Private Attributes
long	m_nBins
	Number of accessible bins.
int	m_nOverlap = 1
	Overlap of the leaves in phi0 counted in number of discrete values.
int	m_nWidth = 3
	Width of the leaves at the maximal level in phi0 counted in number of discrete values.

Detailed Description

Strategy to construct discrete phi0 points from discrete overlap specifications.

Definition at line 20 of file Phi0Rep.h.

Constructor & Destructor Documentation

Phi0BinsSpec()

Phi0BinsSpec	(	long	nBins,
		int	nOverlap,
		int	nWidth
	)

Constructor from fixed number of accessible bins and overlap specification in discrete number of positions.

Definition at line 15 of file Phi0Rep.cc.

  : m_nBins(nBins)
  , m_nOverlap(nOverlap)
  , m_nWidth(nWidth)
{
  B2ASSERT("Overlap must be smaller than the width.", m_nWidth > m_nOverlap);
}

Member Function Documentation

constructArray()

DiscretePhi0::Array constructArray

(

)

const

Construct the array of discrete phi0 positions.

Definition at line 23 of file Phi0Rep.cc.

{
  const long nPositions = getNPositions();
  const double overlap = getOverlap();
  // Adjust the angle bounds such that overlap occurs at the wrap around as well
  const double lowerBound = -M_PI - overlap / 2;
  const double upperBound = +M_PI + overlap / 2;
  return linspace<Vector2D>(lowerBound, upperBound, nPositions, &(Vector2D::Phi));
}

getBinWidth()

double getBinWidth

(

)

const

Getter for the bin width in real phi0 to investigate the value that results from the discrete overlap specification.

Definition at line 39 of file Phi0Rep.cc.

{
  return 2.0 * M_PI / m_nBins + getOverlap();
}

getNOverlap()

int getNOverlap ( ) const

inline

Getter for the overlap in discrete number of positions.

Definition at line 47 of file Phi0Rep.h.

      {
        return m_nOverlap;
      }

getNPositions()

long getNPositions

(

)

const

Getter for the number of bounds.

Definition at line 33 of file Phi0Rep.cc.

{
  const long nPositions = (m_nWidth - m_nOverlap) * m_nBins + m_nOverlap + 1;
  return nPositions;
}

getOverlap()

double getOverlap

(

)

const

Getter for the overlap in real phi0 to investigate the value that results from the discrete overlap specification.

Definition at line 44 of file Phi0Rep.cc.

{
  // Overlap carefully calculated such that the overlap also occurs at
  // the wrap around near M_PI to -M_PI with the same with without spoiling the
  // linearity of the binning.
  const double overlap = 2.0 * M_PI * m_nOverlap / (m_nBins * (m_nWidth - m_nOverlap));
  return overlap;
}

Member Data Documentation

m_nBins

long m_nBins

private

Number of accessible bins.

Definition at line 54 of file Phi0Rep.h.

m_nOverlap

int m_nOverlap = 1

private

Overlap of the leaves in phi0 counted in number of discrete values.

Definition at line 57 of file Phi0Rep.h.

m_nWidth

int m_nWidth = 3

private

Width of the leaves at the maximal level in phi0 counted in number of discrete values.

Definition at line 60 of file Phi0Rep.h.

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

• tracking/trackFindingCDC/hough/perigee/include/Phi0Rep.h
• tracking/trackFindingCDC/hough/perigee/src/Phi0Rep.cc