EvtDalitzCoord.hh

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/*******************************************************************************
 * Project: BaBar detector at the SLAC PEP-II B-factory
 * Package: EvtGenBase
 *    File: $Id: EvtDalitzCoord.hh,v 1.1.1.2 2007/10/26 05:03:14 pingrg Exp $
 *  Author: Alexei Dvoretskii, dvoretsk@slac.stanford.edu, 2001-2002
 *
 * Copyright (C) 2002 Caltech
 *******************************************************************************/
 
// Two dimensional coordinate of a point in a Dalitz plot
 
#ifndef EVT_DALITZ_COORD_HH
#define EVT_DALITZ_COORD_HH
 
#include "EvtCyclic3.hh"
 
#include <iostream>
 
class EvtDalitzCoord {
 
public:
  // ctor, dtor
 
  EvtDalitzCoord();
  EvtDalitzCoord( EvtCyclic3::Pair i1, double q1, EvtCyclic3::Pair i2, double q2 );
  EvtDalitzCoord( const EvtDalitzCoord& other );
  ~EvtDalitzCoord();
 
  inline EvtCyclic3::Pair pair1() const { return _i1; }
  inline EvtCyclic3::Pair pair2() const { return _i2; }
  inline double           q1() const { return _q1; }
  inline double           q2() const { return _q2; }
 
  // It's nice to have an equality operator for
  // a coordinate. However, beware effects of numerical precision
 
  bool operator==( const EvtDalitzCoord& ) const;
 
  void print( std::ostream& ) const;
 
private:
  // Two coordinates define the point
 
  EvtCyclic3::Pair _i1;
  EvtCyclic3::Pair _i2;
 
  double _q1;
  double _q2;
};
 
std::ostream& operator<<( std::ostream&, const EvtDalitzCoord& );
 
#endif