Reconstruction/TrkReco/include/TrkReco/TLine2D.h

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//-----------------------------------------------------------------------------
// $Id: TLine2D.h,v 1.5 2010/03/31 09:58:59 liucy Exp $
//-----------------------------------------------------------------------------
// Filename : TLine2D.h
// Section  : Tracking
// Owner    : Yoshi Iwasaki
// Email    : yoshihito.iwasaki@kek.jp
//-----------------------------------------------------------------------------
// Description : A class to represent a line in 2D.
//               See http://bsunsrv1.kek.jp/~yiwasaki/tracking/
//-----------------------------------------------------------------------------
 
#ifndef TLINE2D_FLAG_
#define TLINE2D_FLAG_
 
#ifdef TRKRECO_DEBUG_DETAIL
#  ifndef TRKRECO_DEBUG
#    define TRKRECO_DEBUG
#  endif
#endif
 
#include "CLHEP/Alist/AList.h"
#include "CLHEP/Alist/ConstAList.h"
 
class TPoint2D;
 
/// A class to represent a line in 2D.
class TLine2D {
 
public:
  /// Constructors
  TLine2D();
  TLine2D( double slope, double yOffset );
  TLine2D( const AList<TPoint2D>& );
 
  /// Destructor
  virtual ~TLine2D();
 
public: // Selectors
  double slope( void ) const;
  double yOffset( void ) const;
  double xOffset( void ) const;
 
public: // Modifiers
  double slope( double );
  double yOffset( double );
 
public: // Fitting
  int    fit( void );
  double det( void ) const;
 
public: // Geometry
  double distance( const TPoint2D& ) const;
 
public: // Point members
  void                    append( const TPoint2D& );
  void                    remove( const TPoint2D& );
  const CAList<TPoint2D>& list( void ) const;
 
private:
  double                    _slope;
  double                    _yOffset;
  double                    _det;
  mutable CAList<TPoint2D>* _list;
};
 
//-----------------------------------------------------------------------------
 
#ifdef TLINE2D_NO_INLINE
#  define inline
#else
#  undef inline
#  define TLINE2D_INLINE_DEFINE_HERE
#endif
#ifdef TLINE2D_INLINE_DEFINE_HERE
 
inline double TLine2D::slope( void ) const { return _slope; }
 
inline double TLine2D::yOffset( void ) const { return _yOffset; }
 
inline double TLine2D::xOffset( void ) const { return -_yOffset / _slope; }
 
inline double TLine2D::slope( double a ) { return _slope = a; }
 
inline double TLine2D::yOffset( double a ) { return _yOffset = a; }
 
#endif
#undef inline
 
#endif /* TLINE2D_FLAG_ */