EvtComplex.cc

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//--------------------------------------------------------------------------
//
// Environment:
//      This software is part of the EvtGen package developed jointly
//      for the BaBar and CLEO collaborations.  If you use all or part
//      of it, please give an appropriate acknowledgement.
//
// Copyright Information: See EvtGen/COPYRIGHT
//      Copyright (C) 1998      Caltech, UCSB
//
// Module: EvtComplex.cc
//
// Description: EvtComlex.cc
//
// Modification history:
//
//    RYD  December 5, 1998            Created
//
//------------------------------------------------------------------------
//
#include "EvtComplex.hh"
#include "EvtPatches.hh"
#include <iostream>
#include <math.h>
using std::ostream;
 
ostream& operator<<( ostream& s, const EvtComplex& c ) {
 
  s << "(" << c._rpart << "," << c._ipart << ")";
  return s;
}
 
EvtComplex& EvtComplex::operator*=( EvtComplex c ) {
 
  double r = _rpart * c._rpart - _ipart * c._ipart;
  double i = _rpart * c._ipart + _ipart * c._rpart;
 
  _rpart = r;
  _ipart = i;
 
  return *this;
}
 
EvtComplex& EvtComplex::operator/=( EvtComplex c ) {
 
  double inv = 1.0 / ( c._rpart * c._rpart + c._ipart * c._ipart );
 
  double r = inv * ( _rpart * c._rpart + _ipart * c._ipart );
  double i = inv * ( _ipart * c._rpart - _rpart * c._ipart );
 
  _rpart = r;
  _ipart = i;
 
  return *this;
}