//------------------------------------------------------------------------------
//  Jan 21, 1996 P.Murat (INFN-Pisa and ITEP-Moscow)
//  miscellaneous definitions for Run1C++
//  revision history:
//  -----------------
// *0001 Apr 16 1996 P.Murat: added cdfTrackPt(curvature)
// *0002 Aug 25 1997 P.Murat: move definition of CDF track Pt into separate file
//------------------------------------------------------------------------------

#ifndef __MISC_HH__
#define __MISC_HH__

// speed of light (cm/sec)
double const SPEED_OF_LIGHT = 2.99792458e10;

double const  PI        = 3.14159265358979323846;
double const  TWOPI     = 2.*PI;
double const  DEGRAD    = PI/180.;
// returns phi angle in the interval
// [0,2*PI)
inline double Phi_0_2pi(double x) {
  while (x >= TWOPI) x -= TWOPI;
  while (x <     0.) x += TWOPI;
  return x;
}
// returns phi angle in the interval
// [-PI,PI]
inline double Phi_mpi_pi(double x) {
  while (x >= PI) x -= TWOPI;
  while (x < -PI) x += TWOPI;
  return x;
}
#endif