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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: EvtVector4C.cc
//
// Description: EvtComplex implemention of 4 - vectors
//
// Modification history:
//
// DJL/RYD September 25, 1996 Module created
//
//------------------------------------------------------------------------
//
#include <iostream>
#include <math.h>
#include <assert.h>
#include "PspGen/EvtComplex.hh"
#include "PspGen/EvtVector4C.hh"
EvtVector4C::EvtVector4C(){
v[0]=EvtComplex(0.0); v[1]=EvtComplex(0.0);
v[2]=EvtComplex(0.0); v[3]=EvtComplex(0.0);
}
EvtVector4C::~EvtVector4C(){}
EvtVector4C::EvtVector4C(const EvtComplex& e0,const EvtComplex& e1,
const EvtComplex& e2,const EvtComplex& e3){
v[0]=e0; v[1]=e1; v[2]=e2; v[3]=e3;
}
EvtVector4C rotateEuler(const EvtVector4C& rs,
double alpha,double beta,double gamma){
EvtVector4C tmp(rs);
tmp.applyRotateEuler(alpha,beta,gamma);
return tmp;
}
EvtVector4C boostTo(const EvtVector4C& rs,
const EvtVector4R p4){
EvtVector4C tmp(rs);
tmp.applyBoostTo(p4);
return tmp;
}
EvtVector4C boostTo(const EvtVector4C& rs,
const EvtVector3R boost){
EvtVector4C tmp(rs);
tmp.applyBoostTo(boost);
return tmp;
}
void EvtVector4C::applyBoostTo(const EvtVector4R& p4){
double e=p4.get(0);
EvtVector3R boost(p4.get(1)/e,p4.get(2)/e,p4.get(3)/e);
applyBoostTo(boost);
return;
}
void EvtVector4C::applyBoostTo(const EvtVector3R& boost){
double bx,by,bz,gamma,b2;
bx=boost.get(0);
by=boost.get(1);
bz=boost.get(2);
double bxx=bx*bx;
double byy=by*by;
double bzz=bz*bz;
b2=bxx+byy+bzz;
if (b2==0.0){
return;
}
assert(b2<1.0);
gamma=1.0/sqrt(1-b2);
double gb2=(gamma-1.0)/b2;
double gb2xy=gb2*bx*by;
double gb2xz=gb2*bx*bz;
double gb2yz=gb2*by*bz;
double gbx=gamma*bx;
double gby=gamma*by;
double gbz=gamma*bz;
EvtComplex e2=v[0];
EvtComplex px2=v[1];
EvtComplex py2=v[2];
EvtComplex pz2=v[3];
v[0]=gamma*e2+gbx*px2+gby*py2+gbz*pz2;
v[1]=gbx*e2+gb2*bxx*px2+px2+gb2xy*py2+gb2xz*pz2;
v[2]=gby*e2+gb2*byy*py2+py2+gb2xy*px2+gb2yz*pz2;
v[3]=gbz*e2+gb2*bzz*pz2+pz2+gb2yz*py2+gb2xz*px2;
return;
}
void EvtVector4C::applyRotateEuler(double phi,double theta,double ksi){
double sp=sin(phi);
double st=sin(theta);
double sk=sin(ksi);
double cp=cos(phi);
double ct=cos(theta);
double ck=cos(ksi);
EvtComplex x=( ck*ct*cp-sk*sp)*v[1]+( -sk*ct*cp-ck*sp)*v[2]+st*cp*v[3];
EvtComplex y=( ck*ct*sp+sk*cp)*v[1]+(-sk*ct*sp+ck*cp)*v[2]+st*sp*v[3];
EvtComplex z=-ck*st*v[1]+sk*st*v[2]+ct*v[3];
v[1]=x;
v[2]=y;
v[3]=z;
}
std::ostream& operator<<(std::ostream& s, const EvtVector4C& v){
s<<"("<<v.v[0]<<","<<v.v[1]<<","<<v.v[2]<<","<<v.v[3]<<")";
return s;
}