BesEvtGen-00-04-08/src/EvtGen/EvtGenBase/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 "EvtGenBase/EvtPatches.hh"
#include <iostream>
#include <math.h>
#include "EvtGenBase/EvtComplex.hh"
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;
 
}