trklet::TrackDer Class Reference

#include <TrackDer.h>

Public Member Functions
int	alphaMask () const
int	diskMask () const
void	fill (int t, double MinvDt[N_FITPARAM][N_FITSTUB *2], int iMinvDt[N_FITPARAM][N_FITSTUB *2]) const
double	iphi0dphi (int i) const
double	iphi0dzordr (int i) const
int	irinv () const
double	irinvdphi (int i) const
double	irinvdzordr (int i) const
double	itdphi (int i) const
int	itdzcorr (int i, int j) const
double	itdzordr (int i) const
double	iz0dphi (int i) const
int	iz0dzcorr (int i, int j) const
double	iz0dzordr (int i) const
int	layerMask () const
double	phi0dphi (int i) const
double	phi0dzordr (int i) const
double	rinvdphi (int i) const
double	rinvdzordr (int i) const
void	setIndex (int layermask, int diskmask, int alphamask, int irinv)
void	setiphi0dphi (int i, int iphi0dphi)
void	setiphi0dzordr (int i, int iphi0dzordr)
void	setirinvdphi (int i, int irinvdphi)
void	setirinvdzordr (int i, int irinvdzordr)
void	setitdphi (int i, int itdphi)
void	setitdzcorr (int i, int j, int itdzcorr)
void	setitdzordr (int i, int itdzordr)
void	setiz0dphi (int i, int iz0dphi)
void	setiz0dzcorr (int i, int j, int iz0dzcorr)
void	setiz0dzordr (int i, int iz0dzordr)
void	setphi0dphi (int i, double phi0dphi)
void	setphi0dzordr (int i, double phi0dzordr)
void	setrinvdphi (int i, double rinvdphi)
void	setrinvdzordr (int i, double rinvdzordr)
void	settdphi (int i, double tdphi)
void	settdzcorr (int i, int j, double tdzcorr)
void	settdzordr (int i, double tdzordr)
void	settpar (double t)
void	setz0dphi (int i, double z0dphi)
void	setz0dzcorr (int i, int j, double z0dzcorr)
void	setz0dzordr (int i, double z0dzordr)
double	tdphi (int i) const
double	tdzcorr (int i, int j) const
double	tdzordr (int i) const
double	tpar () const
	TrackDer ()
double	z0dphi (int i) const
double	z0dzcorr (int i, int j) const
double	z0dzordr (int i) const
	~TrackDer ()=default

Private Attributes
int	alphamask_
int	diskmask_
int	iphi0dphi_ [N_FITSTUB]
int	iphi0dzordr_ [N_FITSTUB]
int	irinv_
int	irinvdphi_ [N_FITSTUB]
int	irinvdzordr_ [N_FITSTUB]
int	itdphi_ [N_FITSTUB]
int	itdzcorr_ [N_PSLAYER][N_PSLAYER]
int	itdzordr_ [N_FITSTUB]
int	iz0dphi_ [N_FITSTUB]
int	iz0dzcorr_ [N_PSLAYER][N_PSLAYER]
int	iz0dzordr_ [N_FITSTUB]
int	layermask_
double	phi0dphi_ [N_FITSTUB]
double	phi0dzordr_ [N_FITSTUB]
double	rinvdphi_ [N_FITSTUB]
double	rinvdzordr_ [N_FITSTUB]
double	t_
double	tdphi_ [N_FITSTUB]
double	tdzcorr_ [N_PSLAYER][N_PSLAYER]
double	tdzordr_ [N_FITSTUB]
double	z0dphi_ [N_FITSTUB]
double	z0dzcorr_ [N_PSLAYER][N_PSLAYER]
double	z0dzordr_ [N_FITSTUB]

Detailed Description

Definition at line 20 of file TrackDer.h.

Constructor & Destructor Documentation

TrackDer::TrackDer

(

)

Definition at line 6 of file TrackDer.cc.

References mps_fire::i, dqmiolumiharvest::j, trklet::N_FITSTUB, and trklet::N_PSLAYER.

                   {
  for (unsigned int i = 0; i < N_FITSTUB; i++) {
    irinvdphi_[i] = 9999999;
    irinvdzordr_[i] = 9999999;
    iphi0dphi_[i] = 9999999;
    iphi0dzordr_[i] = 9999999;
    itdphi_[i] = 9999999;
    itdzordr_[i] = 9999999;
    iz0dphi_[i] = 9999999;
    iz0dzordr_[i] = 9999999;

    rinvdphi_[i] = 0.0;
    rinvdzordr_[i] = 0.0;
    phi0dphi_[i] = 0.0;
    phi0dzordr_[i] = 0.0;
    tdphi_[i] = 0.0;
    tdzordr_[i] = 0.0;
    z0dphi_[i] = 0.0;
    z0dzordr_[i] = 0.0;
  }

  for (unsigned int i = 0; i < N_PSLAYER; i++) {
    for (unsigned int j = 0; j < N_PSLAYER; j++) {
      tdzcorr_[i][j] = 0.0;
      z0dzcorr_[i][j] = 0.0;
    }
  }
}

trklet::TrackDer::~TrackDer ( )

default

Member Function Documentation

int trklet::TrackDer::alphaMask ( ) const

inline

Definition at line 30 of file TrackDer.h.

References alphamask_.

Referenced by trklet::TrackDerTable::fillTable().

{ return alphamask_; }

int trklet::TrackDer::diskMask ( ) const

inline

Definition at line 29 of file TrackDer.h.

References diskmask_.

Referenced by trklet::TrackDerTable::fillTable().

{ return diskmask_; }

void TrackDer::fill	(	int	t,
		double	MinvDt[N_FITPARAM][N_FITSTUB *2],
		int	iMinvDt[N_FITPARAM][N_FITSTUB *2]
	)		const

Definition at line 42 of file TrackDer.cc.

References mps_fire::i, trklet::N_FITSTUB, and jetcorrextractor::sign().

Referenced by trklet::FitTrack::trackFitChisq().

                                                                                                                 {
  unsigned int nlayer = 0;
  if (layermask_ & 1)
    nlayer++;
  if (layermask_ & 2)
    nlayer++;
  if (layermask_ & 4)
    nlayer++;
  if (layermask_ & 8)
    nlayer++;
  if (layermask_ & 16)
    nlayer++;
  if (layermask_ & 32)
    nlayer++;
  int sign = 1;
  if (t < 0)
    sign = -1;
  for (unsigned int i = 0; i < N_FITSTUB; i++) {
    MinvDt[0][2 * i] = rinvdphi_[i];
    MinvDt[1][2 * i] = phi0dphi_[i];
    MinvDt[2][2 * i] = sign * tdphi_[i];
    MinvDt[3][2 * i] = sign * z0dphi_[i];
    MinvDt[0][2 * i + 1] = rinvdzordr_[i];
    MinvDt[1][2 * i + 1] = phi0dzordr_[i];
    MinvDt[2][2 * i + 1] = tdzordr_[i];
    MinvDt[3][2 * i + 1] = z0dzordr_[i];
    iMinvDt[0][2 * i] = irinvdphi_[i];
    iMinvDt[1][2 * i] = iphi0dphi_[i];
    iMinvDt[2][2 * i] = sign * itdphi_[i];
    iMinvDt[3][2 * i] = sign * iz0dphi_[i];
    iMinvDt[0][2 * i + 1] = irinvdzordr_[i];
    iMinvDt[1][2 * i + 1] = iphi0dzordr_[i];
    iMinvDt[2][2 * i + 1] = itdzordr_[i];
    iMinvDt[3][2 * i + 1] = iz0dzordr_[i];
    if (i < nlayer) {
      MinvDt[0][2 * i + 1] *= sign;
      MinvDt[1][2 * i + 1] *= sign;
      iMinvDt[0][2 * i + 1] *= sign;
      iMinvDt[1][2 * i + 1] *= sign;
    } else {
      MinvDt[2][2 * i + 1] *= sign;
      MinvDt[3][2 * i + 1] *= sign;
      iMinvDt[2][2 * i + 1] *= sign;
      iMinvDt[3][2 * i + 1] *= sign;
    }
  }
}

double trklet::TrackDer::iphi0dphi ( int  i ) const

inline

Definition at line 71 of file TrackDer.h.

References mps_fire::i, and iphi0dphi_.

Referenced by setiphi0dphi().

{ return iphi0dphi_[i]; }

double trklet::TrackDer::iphi0dzordr ( int  i ) const

inline

Definition at line 72 of file TrackDer.h.

References mps_fire::i, and iphi0dzordr_.

Referenced by setiphi0dzordr().

{ return iphi0dzordr_[i]; }

int trklet::TrackDer::irinv ( ) const

inline

Definition at line 31 of file TrackDer.h.

References irinv_.

Referenced by trklet::TrackDerTable::fillTable().

{ return irinv_; }

double trklet::TrackDer::irinvdphi ( int  i ) const

inline

Definition at line 69 of file TrackDer.h.

References mps_fire::i, and irinvdphi_.

Referenced by setirinvdphi().

{ return irinvdphi_[i]; }

double trklet::TrackDer::irinvdzordr ( int  i ) const

inline

Definition at line 70 of file TrackDer.h.

References mps_fire::i, and irinvdzordr_.

Referenced by setirinvdzordr().

{ return irinvdzordr_[i]; }

double trklet::TrackDer::itdphi ( int  i ) const

inline

Definition at line 73 of file TrackDer.h.

References mps_fire::i, and itdphi_.

Referenced by setitdphi().

{ return itdphi_[i]; }

int trklet::TrackDer::itdzcorr ( int  i, int  j  ) const

inline

Definition at line 78 of file TrackDer.h.

References mps_fire::i, itdzcorr_, and dqmiolumiharvest::j.

Referenced by setitdzcorr(), and trklet::FitTrack::trackFitChisq().

{ return itdzcorr_[i][j]; }

double trklet::TrackDer::itdzordr ( int  i ) const

inline

Definition at line 74 of file TrackDer.h.

References mps_fire::i, and itdzordr_.

Referenced by setitdzordr().

{ return itdzordr_[i]; }

double trklet::TrackDer::iz0dphi ( int  i ) const

inline

Definition at line 75 of file TrackDer.h.

References mps_fire::i, and iz0dphi_.

Referenced by setiz0dphi().

{ return iz0dphi_[i]; }

int trklet::TrackDer::iz0dzcorr ( int  i, int  j  ) const

inline

Definition at line 79 of file TrackDer.h.

References mps_fire::i, iz0dzcorr_, and dqmiolumiharvest::j.

Referenced by setiz0dzcorr(), and trklet::FitTrack::trackFitChisq().

{ return iz0dzcorr_[i][j]; }

double trklet::TrackDer::iz0dzordr ( int  i ) const

inline

Definition at line 76 of file TrackDer.h.

References mps_fire::i, and iz0dzordr_.

Referenced by setiz0dzordr().

{ return iz0dzordr_[i]; }

int trklet::TrackDer::layerMask ( ) const

inline

Definition at line 28 of file TrackDer.h.

References layermask_.

Referenced by trklet::TrackDerTable::fillTable().

{ return layermask_; }

double trklet::TrackDer::phi0dphi ( int  i ) const

inline

Definition at line 59 of file TrackDer.h.

References mps_fire::i, and phi0dphi_.

Referenced by setphi0dphi().

{ return phi0dphi_[i]; }

double trklet::TrackDer::phi0dzordr ( int  i ) const

inline

Definition at line 60 of file TrackDer.h.

References mps_fire::i, and phi0dzordr_.

Referenced by setphi0dzordr().

{ return phi0dzordr_[i]; }

double trklet::TrackDer::rinvdphi ( int  i ) const

inline

Definition at line 57 of file TrackDer.h.

References mps_fire::i, and rinvdphi_.

Referenced by setrinvdphi().

{ return rinvdphi_[i]; }

double trklet::TrackDer::rinvdzordr ( int  i ) const

inline

Definition at line 58 of file TrackDer.h.

References mps_fire::i, and rinvdzordr_.

Referenced by setrinvdzordr().

{ return rinvdzordr_[i]; }

void TrackDer::setIndex	(	int	layermask,
		int	diskmask,
		int	alphamask,
		int	irinv
	)

Definition at line 35 of file TrackDer.cc.

Referenced by trklet::TrackDerTable::addEntry().

                                                                             {
  layermask_ = layermask;
  diskmask_ = diskmask;
  alphamask_ = alphamask;
  irinv_ = irinv;
}

void trklet::TrackDer::setiphi0dphi ( int  i, int  iphi0dphi  )

inline

Definition at line 35 of file TrackDer.h.

References mps_fire::i, iphi0dphi(), and iphi0dphi_.

Referenced by trklet::TrackDerTable::fillTable().

{ iphi0dphi_[i] = iphi0dphi; }

void trklet::TrackDer::setiphi0dzordr ( int  i, int  iphi0dzordr  )

inline

Definition at line 36 of file TrackDer.h.

References mps_fire::i, iphi0dzordr(), and iphi0dzordr_.

Referenced by trklet::TrackDerTable::fillTable().

{ iphi0dzordr_[i] = iphi0dzordr; }

void trklet::TrackDer::setirinvdphi ( int  i, int  irinvdphi  )

inline

Definition at line 33 of file TrackDer.h.

References mps_fire::i, irinvdphi(), and irinvdphi_.

Referenced by trklet::TrackDerTable::fillTable().

{ irinvdphi_[i] = irinvdphi; }

void trklet::TrackDer::setirinvdzordr ( int  i, int  irinvdzordr  )

inline

Definition at line 34 of file TrackDer.h.

References mps_fire::i, irinvdzordr(), and irinvdzordr_.

Referenced by trklet::TrackDerTable::fillTable().

{ irinvdzordr_[i] = irinvdzordr; }

void trklet::TrackDer::setitdphi ( int  i, int  itdphi  )

inline

Definition at line 37 of file TrackDer.h.

References mps_fire::i, itdphi(), and itdphi_.

Referenced by trklet::TrackDerTable::fillTable().

{ itdphi_[i] = itdphi; }

void trklet::TrackDer::setitdzcorr ( int  i, int  j, int  itdzcorr  )

inline

Definition at line 42 of file TrackDer.h.

References mps_fire::i, itdzcorr(), itdzcorr_, and dqmiolumiharvest::j.

Referenced by trklet::TrackDerTable::fillTable().

{ itdzcorr_[i][j] = itdzcorr; }

void trklet::TrackDer::setitdzordr ( int  i, int  itdzordr  )

inline

Definition at line 38 of file TrackDer.h.

References mps_fire::i, itdzordr(), and itdzordr_.

Referenced by trklet::TrackDerTable::fillTable().

{ itdzordr_[i] = itdzordr; }

void trklet::TrackDer::setiz0dphi ( int  i, int  iz0dphi  )

inline

Definition at line 39 of file TrackDer.h.

References mps_fire::i, iz0dphi(), and iz0dphi_.

Referenced by trklet::TrackDerTable::fillTable().

{ iz0dphi_[i] = iz0dphi; }

void trklet::TrackDer::setiz0dzcorr ( int  i, int  j, int  iz0dzcorr  )

inline

Definition at line 43 of file TrackDer.h.

References mps_fire::i, iz0dzcorr(), iz0dzcorr_, and dqmiolumiharvest::j.

Referenced by trklet::TrackDerTable::fillTable().

{ iz0dzcorr_[i][j] = iz0dzcorr; }

void trklet::TrackDer::setiz0dzordr ( int  i, int  iz0dzordr  )

inline

Definition at line 40 of file TrackDer.h.

References mps_fire::i, iz0dzordr(), and iz0dzordr_.

Referenced by trklet::TrackDerTable::fillTable().

{ iz0dzordr_[i] = iz0dzordr; }

void trklet::TrackDer::setphi0dphi ( int  i, double  phi0dphi  )

inline

Definition at line 47 of file TrackDer.h.

References mps_fire::i, phi0dphi(), and phi0dphi_.

Referenced by trklet::TrackDerTable::fillTable().

{ phi0dphi_[i] = phi0dphi; }

void trklet::TrackDer::setphi0dzordr ( int  i, double  phi0dzordr  )

inline

Definition at line 48 of file TrackDer.h.

References mps_fire::i, phi0dzordr(), and phi0dzordr_.

Referenced by trklet::TrackDerTable::fillTable().

{ phi0dzordr_[i] = phi0dzordr; }

void trklet::TrackDer::setrinvdphi ( int  i, double  rinvdphi  )

inline

Definition at line 45 of file TrackDer.h.

References mps_fire::i, rinvdphi(), and rinvdphi_.

Referenced by trklet::TrackDerTable::fillTable().

{ rinvdphi_[i] = rinvdphi; }

void trklet::TrackDer::setrinvdzordr ( int  i, double  rinvdzordr  )

inline

Definition at line 46 of file TrackDer.h.

References mps_fire::i, rinvdzordr(), and rinvdzordr_.

Referenced by trklet::TrackDerTable::fillTable().

{ rinvdzordr_[i] = rinvdzordr; }

void trklet::TrackDer::settdphi ( int  i, double  tdphi  )

inline

Definition at line 49 of file TrackDer.h.

References mps_fire::i, tdphi(), and tdphi_.

Referenced by trklet::TrackDerTable::fillTable().

{ tdphi_[i] = tdphi; }

void trklet::TrackDer::settdzcorr ( int  i, int  j, double  tdzcorr  )

inline

Definition at line 54 of file TrackDer.h.

References mps_fire::i, dqmiolumiharvest::j, tdzcorr(), and tdzcorr_.

Referenced by trklet::TrackDerTable::fillTable().

{ tdzcorr_[i][j] = tdzcorr; }

void trklet::TrackDer::settdzordr ( int  i, double  tdzordr  )

inline

Definition at line 50 of file TrackDer.h.

References mps_fire::i, tdzordr(), and tdzordr_.

Referenced by trklet::TrackDerTable::fillTable().

{ tdzordr_[i] = tdzordr; }

void trklet::TrackDer::settpar ( double  t )

inline

Definition at line 81 of file TrackDer.h.

References submitPVValidationJobs::t, and t_.

Referenced by trklet::TrackDerTable::fillTable().

{ t_ = t; }

void trklet::TrackDer::setz0dphi ( int  i, double  z0dphi  )

inline

Definition at line 51 of file TrackDer.h.

References mps_fire::i, z0dphi(), and z0dphi_.

Referenced by trklet::TrackDerTable::fillTable().

{ z0dphi_[i] = z0dphi; }

void trklet::TrackDer::setz0dzcorr ( int  i, int  j, double  z0dzcorr  )

inline

Definition at line 55 of file TrackDer.h.

References mps_fire::i, dqmiolumiharvest::j, z0dzcorr(), and z0dzcorr_.

Referenced by trklet::TrackDerTable::fillTable().

{ z0dzcorr_[i][j] = z0dzcorr; }

void trklet::TrackDer::setz0dzordr ( int  i, double  z0dzordr  )

inline

Definition at line 52 of file TrackDer.h.

References mps_fire::i, z0dzordr(), and z0dzordr_.

Referenced by trklet::TrackDerTable::fillTable().

{ z0dzordr_[i] = z0dzordr; }

double trklet::TrackDer::tdphi ( int  i ) const

inline

Definition at line 61 of file TrackDer.h.

References mps_fire::i, and tdphi_.

Referenced by settdphi().

{ return tdphi_[i]; }

double trklet::TrackDer::tdzcorr ( int  i, int  j  ) const

inline

Definition at line 66 of file TrackDer.h.

References mps_fire::i, dqmiolumiharvest::j, and tdzcorr_.

Referenced by settdzcorr(), and trklet::FitTrack::trackFitChisq().

{ return tdzcorr_[i][j]; }

double trklet::TrackDer::tdzordr ( int  i ) const

inline

Definition at line 62 of file TrackDer.h.

References mps_fire::i, and tdzordr_.

Referenced by settdzordr().

{ return tdzordr_[i]; }

double trklet::TrackDer::tpar ( ) const

inline

Definition at line 82 of file TrackDer.h.

References t_.

{ return t_; }

double trklet::TrackDer::z0dphi ( int  i ) const

inline

Definition at line 63 of file TrackDer.h.

References mps_fire::i, and z0dphi_.

Referenced by setz0dphi().

{ return z0dphi_[i]; }

double trklet::TrackDer::z0dzcorr ( int  i, int  j  ) const

inline

Definition at line 67 of file TrackDer.h.

References mps_fire::i, dqmiolumiharvest::j, and z0dzcorr_.

Referenced by setz0dzcorr(), and trklet::FitTrack::trackFitChisq().

{ return z0dzcorr_[i][j]; }

double trklet::TrackDer::z0dzordr ( int  i ) const

inline

Definition at line 64 of file TrackDer.h.

References mps_fire::i, and z0dzordr_.

Referenced by setz0dzordr().

{ return z0dzordr_[i]; }

Member Data Documentation

int trklet::TrackDer::alphamask_

private

Definition at line 115 of file TrackDer.h.

Referenced by alphaMask().

int trklet::TrackDer::diskmask_

private

Definition at line 114 of file TrackDer.h.

Referenced by diskMask().

int trklet::TrackDer::iphi0dphi_[N_FITSTUB]

private

Definition at line 89 of file TrackDer.h.

Referenced by iphi0dphi(), and setiphi0dphi().

int trklet::TrackDer::iphi0dzordr_[N_FITSTUB]

private

Definition at line 90 of file TrackDer.h.

Referenced by iphi0dzordr(), and setiphi0dzordr().

int trklet::TrackDer::irinv_

private

Definition at line 116 of file TrackDer.h.

Referenced by irinv().

int trklet::TrackDer::irinvdphi_[N_FITSTUB]

private

Definition at line 87 of file TrackDer.h.

Referenced by irinvdphi(), and setirinvdphi().

int trklet::TrackDer::irinvdzordr_[N_FITSTUB]

private

Definition at line 88 of file TrackDer.h.

Referenced by irinvdzordr(), and setirinvdzordr().

int trklet::TrackDer::itdphi_[N_FITSTUB]

private

Definition at line 91 of file TrackDer.h.

Referenced by itdphi(), and setitdphi().

int trklet::TrackDer::itdzcorr_[N_PSLAYER][N_PSLAYER]

private

Definition at line 96 of file TrackDer.h.

Referenced by itdzcorr(), and setitdzcorr().

int trklet::TrackDer::itdzordr_[N_FITSTUB]

private

Definition at line 92 of file TrackDer.h.

Referenced by itdzordr(), and setitdzordr().

int trklet::TrackDer::iz0dphi_[N_FITSTUB]

private

Definition at line 93 of file TrackDer.h.

Referenced by iz0dphi(), and setiz0dphi().

int trklet::TrackDer::iz0dzcorr_[N_PSLAYER][N_PSLAYER]

private

Definition at line 97 of file TrackDer.h.

Referenced by iz0dzcorr(), and setiz0dzcorr().

int trklet::TrackDer::iz0dzordr_[N_FITSTUB]

private

Definition at line 94 of file TrackDer.h.

Referenced by iz0dzordr(), and setiz0dzordr().

int trklet::TrackDer::layermask_

private

Definition at line 113 of file TrackDer.h.

Referenced by layerMask().

double trklet::TrackDer::phi0dphi_[N_FITSTUB]

private

Definition at line 101 of file TrackDer.h.

Referenced by phi0dphi(), and setphi0dphi().

double trklet::TrackDer::phi0dzordr_[N_FITSTUB]

private

Definition at line 102 of file TrackDer.h.

Referenced by phi0dzordr(), and setphi0dzordr().

double trklet::TrackDer::rinvdphi_[N_FITSTUB]

private

Definition at line 99 of file TrackDer.h.

Referenced by rinvdphi(), and setrinvdphi().

double trklet::TrackDer::rinvdzordr_[N_FITSTUB]

private

Definition at line 100 of file TrackDer.h.

Referenced by rinvdzordr(), and setrinvdzordr().

double trklet::TrackDer::t_

private

Definition at line 111 of file TrackDer.h.

Referenced by settpar(), and tpar().

double trklet::TrackDer::tdphi_[N_FITSTUB]

private

Definition at line 103 of file TrackDer.h.

Referenced by settdphi(), and tdphi().

double trklet::TrackDer::tdzcorr_[N_PSLAYER][N_PSLAYER]

private

Definition at line 108 of file TrackDer.h.

Referenced by settdzcorr(), and tdzcorr().

double trklet::TrackDer::tdzordr_[N_FITSTUB]

private

Definition at line 104 of file TrackDer.h.

Referenced by settdzordr(), and tdzordr().

double trklet::TrackDer::z0dphi_[N_FITSTUB]

private

Definition at line 105 of file TrackDer.h.

Referenced by setz0dphi(), and z0dphi().

double trklet::TrackDer::z0dzcorr_[N_PSLAYER][N_PSLAYER]

private

Definition at line 109 of file TrackDer.h.

Referenced by setz0dzcorr(), and z0dzcorr().

double trklet::TrackDer::z0dzordr_[N_FITSTUB]

private

Definition at line 106 of file TrackDer.h.

Referenced by setz0dzordr(), and z0dzordr().