TrigL2MuonSA::UtilTools Class Reference

#include <CscRegUtils.h>

Collaboration diagram for TrigL2MuonSA::UtilTools:

Public Member Functions
	UtilTools ()
double	calc_theta (double eta) const
double	calc_theta (double x, double y, double z) const
double	calc_eta (double x, double y, double z) const
double	calc_phi (double x, double y) const
double	calc_dphi (double phi1, double phi2) const
double	calc_sumsq (double x, double y) const
double	calc_sumsq (double x, double y, double z) const
double	cotan (double theta) const
double	relative_error (double measured, double reference) const
double	average_phi (double phi1, double phi2) const

Detailed Description

Definition at line 25 of file CscRegUtils.h.

Constructor & Destructor Documentation

UtilTools()

TrigL2MuonSA::UtilTools::UtilTools ( )

inline

Definition at line 28 of file CscRegUtils.h.

{}

Member Function Documentation

average_phi()

double TrigL2MuonSA::UtilTools::average_phi	(	double	phi1,
		double	phi2
	)		const

Definition at line 243 of file CscRegUtils.cxx.

{  
  double phi = 0.;
  
  if (phi1*phi2<0. && std::abs(phi1)>M_PI/2.){
    
    double tmp1 = (phi1>0.) ? phi1 - M_PI : phi1 + M_PI;
    double tmp2 = (phi2>0.) ? phi2 - M_PI : phi2 + M_PI;
    
    double tmp = (tmp1+tmp2)/2.;
    
    phi = (tmp>0.) ? tmp - M_PI : tmp + M_PI;
    
  } else {
    
    phi = (phi1+phi2)/2.;
    
  }
  
  return phi;
}

calc_dphi()

double TrigL2MuonSA::UtilTools::calc_dphi	(	double	phi1,
		double	phi2
	)		const

Definition at line 229 of file CscRegUtils.cxx.

{  
  double dphi=phi1-phi2;
  
  if (dphi > M_PI) {
    dphi -= 2*M_PI;
  }else if(dphi < (-1)*M_PI){
    dphi += 2*M_PI;
  }
  
  return dphi; 
}

calc_eta()

double TrigL2MuonSA::UtilTools::calc_eta ( double  x, double  y, double  z  ) const

inline

Definition at line 32 of file CscRegUtils.h.

{return (-1)*std::log(std::tan(calc_theta(x,y,z)/2.));}

calc_phi()

double TrigL2MuonSA::UtilTools::calc_phi	(	double	x,
		double	y
	)		const

Definition at line 207 of file CscRegUtils.cxx.

                                                    {
  
  double /*abs_x=std::abs(x),*/ abs_y=std::abs(y);
  double abs_sine=abs_y/std::sqrt(x*x+y*y);
    //std::cout << "convert " << ASin(abssin) << std::endl;
  
  if (x>0 && y>=0) {
    return std::asin(abs_sine);
  }else if(x<=0 && y>0){
    return M_PI-std::asin(abs_sine);
  }else if(x<0 && y<=0){
    return M_PI+std::asin(abs_sine)-2*M_PI;
  }else if(x>=0 && y<0){
    return 2*M_PI-std::asin(abs_sine)-2*M_PI;
  }else{
      //std::cout<< "UtilTools::calc_phi, sin=cos=0" << std::endl;
    return 0.;
  }
  
}

calc_sumsq() [1/2]

double TrigL2MuonSA::UtilTools::calc_sumsq ( double  x, double  y  ) const

inline

Definition at line 35 of file CscRegUtils.h.

{ return std::sqrt(x*x+y*y); }

calc_sumsq() [2/2]

double TrigL2MuonSA::UtilTools::calc_sumsq ( double  x, double  y, double  z  ) const

inline

Definition at line 36 of file CscRegUtils.h.

{ return std::sqrt(x*x+y*y+z*z);}

calc_theta() [1/2]

double TrigL2MuonSA::UtilTools::calc_theta ( double  eta ) const

inline

Definition at line 30 of file CscRegUtils.h.

{ return 2*std::atan(std::exp((-1)*eta)); }

calc_theta() [2/2]

double TrigL2MuonSA::UtilTools::calc_theta ( double  x, double  y, double  z  ) const

inline

Definition at line 31 of file CscRegUtils.h.

{ return std::acos(z/std::sqrt(x*x+y*y+z*z)); } // for position not for direction theta in [0,pi]

cotan()

double TrigL2MuonSA::UtilTools::cotan ( double  theta ) const

inline

Definition at line 37 of file CscRegUtils.h.

{ return std::tan(M_PI-theta); }

relative_error()

double TrigL2MuonSA::UtilTools::relative_error ( double  measured, double  reference  ) const

inline

Definition at line 38 of file CscRegUtils.h.

{return (measured-reference)/reference; }

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

• CscRegUtils.h
• CscRegUtils.cxx