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// -*- C++ -*-
//
// Package:     <package>
// Module:      Lpav
// 
// Description: <one line class summary>
//
// Usage:
//    <usage>
//
// Author:      KATAYAMA Nobuhiko
// Created:     Fri Feb  6 10:21:38 JST 1998
// $Id: Lpav.h,v 1.1.1.1 2008/06/16 02:10:31 max Exp $

#if !defined(PACKAGE_LPAV_H_INCLUDED)
#define PACKAGE_LPAV_H_INCLUDED

// system include files
#include <iosfwd>

// user include files
#include "CLHEP/Matrix/SymMatrix.h"
#include "TrackUtil/Lpar.h"
using namespace CLHEP;

// forward declarations

class Lpav : public Lpar
{
    // friend classes and functions

  public:
    // constants, enums and typedefs

    // Constructors and destructor
    Lpav();
    virtual ~Lpav();

    // member functions
    void calculate_average(void);
    void calculate_average3(void);
    void calculate_average(double x, double y, double w=1);
    void calculate_average3(double x, double y, double w=1);
    double calculate_lpar(void);
    double calculate_lpar3(void);
    double fit();
    double fit(double x, double y, double w=1);
    inline void clear();
    void add_point(double x, double y, double w=1);
    void add_point_frac(double x, double y, double w, double f);

    // const member functions
    double nc() const { return m_nc; }
    HepSymMatrix cov(int=0) const;
    HepSymMatrix cov_c(int=0) const;
    int extrapolate(double, double&, double&) const;
    double similarity(double, double) const;
    double delta_chisq(double x, double y, double w=1) const;
    double chisq() const { return m_chisq; }
    double prob() const;
    double chi_deg() const;

    // static member functions

    // assignment operator(s)
    inline const Lpav& operator=( const Lpav& );
    const Lpav& operator=( const Lpar& );
    const Lpav& operator+=( const Lpav& );

    friend std::ostream& operator<<(std::ostream &o, const Lpav &s);
    friend Lpav operator+(const Lpav &, const Lpav &);
    class Singular {}; // exception class, no covarience matrix.
    class Singular_c {}; // exception class, no covarience matrix_c

  protected:
    // protected member functions

    // protected const member functions

  private:
    // Constructors and destructor
    inline Lpav( const Lpav& );

    // comparison operators
    bool operator==( const Lpav& ) const;
    bool operator!=( const Lpav& ) const;

    // private member functions
    void add(double x, double y, double w=1, double a=0, double b=0);
    void sub(double x, double y, double w=1, double a=0, double b=0);
    void calculate_average_n(double xxav, double yyav, double xyav,
                               double xrrav, double yrrav, double rrrrav);
    double chisq(double chisq) { m_chisq = chisq; return m_chisq; }
    double nc(double nc) { m_nc = nc; return m_nc; }
    double solve_lambda(void);
    double solve_lambda3(void);

    // private const member functions

    // data members
    double m_wsum;
    double m_xsum;
    double m_ysum;
    double m_xxsum;
    double m_yysum;
    double m_xysum;
    double m_xrrsum;
    double m_yrrsum;
    double m_rrrrsum;

    double m_wsum_temp;
    double m_xav;
    double m_yav;
    double m_xyavp;

    double m_rscale;
    double m_xxavp;
    double m_yyavp;
    double m_xrravp;
    double m_yrravp;
    double m_rrrravp;
    double m_sinrot;
    double m_cosrot;

    double m_nc;
    double m_chisq;

    // static data members

};

// inline function definitions
inline const Lpav & Lpav::operator=(const Lpav &lp) {
  Lpar::operator=(lp);
  m_wsum = lp.m_wsum;
  m_xsum = lp.m_xsum;
  m_ysum = lp.m_ysum;
  m_xxsum = lp.m_xxsum;
  m_yysum = lp.m_yysum;
  m_xysum = lp.m_xysum;
  m_xrrsum = lp.m_xrrsum;
  m_yrrsum = lp.m_yrrsum;
  m_rrrrsum = lp.m_rrrrsum;
  
  m_wsum_temp = lp. m_wsum_temp;
  m_xav = lp.m_xav;
  m_yav = lp.m_yav;
  m_xyavp = lp.m_xyavp;
  
  m_rscale = lp. m_rscale;
  m_xxavp = lp.m_xxavp;
  m_yyavp = lp.m_yyavp;
  m_xrravp = lp.m_xrravp;
  m_yrravp = lp.m_yrravp;
  m_rrrravp = lp.m_rrrravp;
  m_sinrot = lp.m_sinrot;
  m_cosrot = lp.m_cosrot;
  
  m_nc = lp. m_nc;
  m_chisq = lp.m_chisq;
  return *this;
}

inline Lpav::Lpav(const Lpav &lp) : Lpar(lp) {
  m_wsum = lp.m_wsum;
  m_xsum = lp.m_xsum;
  m_ysum = lp.m_ysum;
  m_xxsum = lp.m_xxsum;
  m_yysum = lp.m_yysum;
  m_xysum = lp.m_xysum;
  m_xrrsum = lp.m_xrrsum;
  m_yrrsum = lp.m_yrrsum;
  m_rrrrsum = lp.m_rrrrsum;
  
  m_wsum_temp = lp. m_wsum_temp;
  m_xav = lp.m_xav;
  m_yav = lp.m_yav;
  m_xyavp = lp.m_xyavp;
  
  m_rscale = lp. m_rscale;
  m_xxavp = lp.m_xxavp;
  m_yyavp = lp.m_yyavp;
  m_xrravp = lp.m_xrravp;
  m_yrravp = lp.m_yrravp;
  m_rrrravp = lp.m_rrrravp;
  m_sinrot = lp.m_sinrot;
  m_cosrot = lp.m_cosrot;
  
  m_nc = lp. m_nc;
  m_chisq = lp.m_chisq;
  return;
}

inline void Lpav::clear() {
  m_wsum = m_xsum = m_ysum = m_xxsum = m_yysum = m_xysum
    = m_xrrsum = m_yrrsum = m_rrrrsum  = m_rscale = m_nc = 0;
  m_chisq = -1;
}

#endif /* PACKAGE_LPAV_H_INCLUDED */

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