JetUtil Class Reference

#include <JetUtil.h>

Static Public Member Functions
static double	dPhi (double phi1, double phi2)
static double	Phi_0_2pi (double x)
static double	Phi_mpi_pi (double x)
template<typename T1 , typename T2 >
static double	radius (const T1 &t1, const T2 &t2)
static double	radius (double eta1, double phi1, double eta2, double phi2)

Detailed Description

Definition at line 23 of file JetUtil.h.

Member Function Documentation

dPhi()

static double JetUtil::dPhi ( double  phi1, double  phi2  )

inlinestatic

Definition at line 41 of file JetUtil.h.

                                               {
    phi1 = Phi_0_2pi(phi1);
    phi2 = Phi_0_2pi(phi2);
    return Phi_mpi_pi(phi1 - phi2);
  }

References Phi_0_2pi(), and Phi_mpi_pi().

Phi_0_2pi()

static double JetUtil::Phi_0_2pi ( double  x )

inlinestatic

Definition at line 25 of file JetUtil.h.

                                    {
    while (x >= 2 * M_PI)
      x -= 2 * M_PI;
    while (x < 0.)
      x += 2 * M_PI;
    return x;
  }

References M_PI, and x.

Referenced by dPhi(), and radius().

Phi_mpi_pi()

static double JetUtil::Phi_mpi_pi ( double  x )

inlinestatic

Definition at line 33 of file JetUtil.h.

                                     {
    while (x >= M_PI)
      x -= 2 * M_PI;
    while (x < -M_PI)
      x += 2 * M_PI;
    return x;
  }

References M_PI, and x.

Referenced by dPhi().

radius() [1/2]

template<typename T1 , typename T2 >

static double JetUtil::radius ( const T1 &  t1, const T2 &  t2  )

inlinestatic

Definition at line 61 of file JetUtil.h.

                                                   {
    return radius(t1->eta(), t1->phi(), t2->eta(), t2->phi());
  }

References radius(), RandomServiceHelper::t1, and RandomServiceHelper::t2.

radius() [2/2]

static double JetUtil::radius ( double  eta1, double  phi1, double  eta2, double  phi2  )

inlinestatic

Definition at line 47 of file JetUtil.h.

                                                                           {
    const double TWOPI = 2.0 * M_PI;
 
    phi1 = Phi_0_2pi(phi1);
    phi2 = Phi_0_2pi(phi2);
 
    double dphi = Phi_0_2pi(phi1 - phi2);
    dphi = std::min(dphi, TWOPI - dphi);
    double deta = eta1 - eta2;
 
    return sqrt(deta * deta + dphi * dphi);
  }

References HLT_FULL_cff::eta1, HLT_FULL_cff::eta2, M_PI, min(), Phi_0_2pi(), mathSSE::sqrt(), and TWOPI.

Referenced by radius().