EvtmyEulerAngles.hh

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//--------------------------------------------------------------------------
//
// Environment:
//      This software is part of models developed at BES collaboration
//      based on the EvtGen framework.  If you use all or part bn
//      of it, please give an appropriate acknowledgement.
//
// Copyright Information: See EvtGen/BesCopyright
//      Copyright (A) 2006      Ping Rong-Gang @IHEP
//
// Module:  EvtDIY.cc
//
// Description:  Class to calculate the Euler angles to rotate a system
//
// Modification history:
//
//    Ping R.-G.       December, 2007       Module created
//
//------------------------------------------------------------------------
//
#ifndef EVTMYEULERANGLES_HH
#define EVTMYEULERANGLES_HH
 
#include <iostream>
// #include <math.h>
#include "EvtVector3R.hh"
#include "EvtVector4R.hh"
 
// using std::endl;
// using std::fstream;
 
class EvtmyEulerAngles {
 
public:
  // destructor
  virtual ~EvtmyEulerAngles();
 
  // constructor
  EvtmyEulerAngles();
  EvtmyEulerAngles( const EvtVector3R& Yaxis, const EvtVector3R& Zaxis );
  EvtmyEulerAngles( const EvtVector4R& Pyaxis, const EvtVector4R& Pzaxis );
  EvtmyEulerAngles( EvtVector4R& h1, EvtVector4R& h2 ); // Euler rotation from h1 to h2
  EvtmyEulerAngles( EvtVector4R x1, EvtVector4R y1, EvtVector4R x2, EvtVector4R y2,
                    std::string axisTag ); // Euler rotation from (x1,y1,z1) to (x2,y2,z2)
  void   EulerAngles();
  double getAlpha();
  double getBeta();
  double getGamma();
  double getphi();   // alpha  using EvtmyEulerAngles( EvtVector4R h1,  EvtVector4R h2);
  double gettheta(); // beta
  double getpsi();   // gamma
private:
  EvtVector3R _Yaxis, _Zaxis;
  double      _alpha, _beta, _gamma, _ry, _rz;
  EvtVector4R _x, _X, xx, yy, zz, XX, YY, ZZ;
  EvtVector4R Zcm, _N;
};
 
#endif