EvtVector3C.cc

//--------------------------------------------------------------------------
//
// 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: EvtVector3C.cc
//
// Description: Complex 3 vectors.
//
// Modification history:
//
//    RYD       September 5, 1997       Module created
//
//------------------------------------------------------------------------
// 
#include <iostream>
#include <math.h>
#include "PspGen/EvtComplex.hh"
#include "PspGen/EvtVector3C.hh"

EvtVector3C::EvtVector3C(){

  v[0]=EvtComplex(0.0); v[1]=EvtComplex(0.0); v[2]=EvtComplex(0.0); 
}

EvtVector3C::~EvtVector3C(){

  return;
}


EvtVector3C::EvtVector3C(const EvtComplex& e1,const EvtComplex& e2,const EvtComplex& e3){

  v[0]=e1; v[1]=e2; v[2]=e3;
}


EvtVector3C EvtVector3C::cross( const EvtVector3C& p2 ){

  //Calcs the cross product.  Added by djl on July 27, 1995.

  EvtVector3C temp;
  
  temp.v[0] = v[1]*p2.v[2] - v[2]*p2.v[1];
  temp.v[1] = v[2]*p2.v[0] - v[0]*p2.v[2];
  temp.v[2] = v[0]*p2.v[1] - v[1]*p2.v[0];

  return temp;
}

EvtVector3C rotateEuler(const EvtVector3C& v,
			double alpha,double beta,double gamma){

  EvtVector3C tmp(v);
  tmp.applyRotateEuler(alpha,beta,gamma);
  return tmp;

}


void EvtVector3C::applyRotateEuler(double phi,double theta,double ksi){

  EvtComplex temp[3];
  double sp,st,sk,cp,ct,ck;

  sp=sin(phi);
  st=sin(theta);
  sk=sin(ksi);
  cp=cos(phi);
  ct=cos(theta);
  ck=cos(ksi);

  temp[0]=( ck*ct*cp-sk*sp)*v[0]+( -sk*ct*cp-ck*sp)*v[1]+st*cp*v[2];
  temp[1]=( ck*ct*sp+sk*cp)*v[0]+(-sk*ct*sp+ck*cp)*v[1]+st*sp*v[2];
  temp[2]=-ck*st*v[0]+sk*st*v[1]+ct*v[2];


  v[0]=temp[0];
  v[1]=temp[1];
  v[2]=temp[2];
}



std:: ostream& operator<<(std:: ostream& s, const EvtVector3C& v){

  s<<"("<<v.v[0]<<","<<v.v[1]<<","<<v.v[2]<<")";
  
  return s;
}