CircularRange.hh

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#ifndef __FASTJET_CIRCULARRANGE_HH__
#define __FASTJET_CIRCULARRANGE_HH__
 
#include "fastjet/RangeDefinition.hh"
#include "fastjet/Error.hh"
#include "fastjet/internal/deprecated.hh"
 
// for backwards compatibility: one should now use SelectorCircle,
// defined in fastjet/Selector.hh, instead CircularRange
#warning This file includes fastjet/CircularRange.hh, \
a deprecated FastJet header provided only for backward compatibility. \
This is not guaranteed to work in future releases of FastJet. \
From FastJet 3.0 onwards, please consider using Selector, defined in \
fastjet/Selector.hh, instead of RangeDefinition and, in particular, \
SelectorCircle instead of CircularRange.
 
FASTJET_BEGIN_NAMESPACE      // defined in fastjet/internal/base.hh
 
class CircularRange : public fastjet::RangeDefinition {
public:
  /// constructor
  FASTJET_DEPRECATED_MSG("CircularRange is deprecated since FastJet 3.0. Use SelectorCircle instead",
  CircularRange()) {_set_invalid_rapphi();}
  
  /// initialise CircularRange with a jet
  FASTJET_DEPRECATED_MSG("CircularRange is deprecated since FastJet 3.0. Use SelectorCircle instead",
  CircularRange(const fastjet::PseudoJet & jet, double distance)) {
                _distance = distance;
                _rapjet = jet.rap();
                _phijet = jet.phi();
                _total_area = fastjet::pi*_distance*_distance;  }
 
  /// initialise CircularRange with a (rap,phi) point
  FASTJET_DEPRECATED_MSG("CircularRange is deprecated since FastJet 3.0. Use SelectorCircle instead",
  CircularRange(double rap, double phi, double distance)) {
                _distance = distance;
                _rapjet = rap;
                _phijet = phi;
                _total_area = fastjet::pi*_distance*_distance;  }
 
  /// initialise CircularRange with just the radius parameter
  FASTJET_DEPRECATED_MSG("CircularRange is deprecated since FastJet 3.0. Use SelectorCircle instead",
  CircularRange(double distance)) {
                _set_invalid_rapphi();
                _distance = distance;
                _total_area = fastjet::pi*_distance*_distance;  }
  
  /// destructor
  virtual ~CircularRange() {}
  
  /// return description of range
  virtual inline std::string description() const FASTJET_OVERRIDE {
    std::ostringstream ostr;
    ostr << "CircularRange: within distance "<< _distance << " of given jet or point." ;
    return ostr.str(); }
 
  /// returns true since this range is localizable (i.e. set_position
  /// does something meaningful)
  virtual inline bool is_localizable() const FASTJET_OVERRIDE { return true; }
  
  /// return bool according to whether (rap,phi) is in range
  virtual inline bool is_in_range(double rap, double phi) const FASTJET_OVERRIDE {
     if (! _rapphi_are_valid()) {
       throw Error("Circular range used without a center having being defined (use set_position())");
     }
     double deltaphi = _phijet - phi;
     if ( deltaphi > pi) { deltaphi -= twopi; }
     else if ( deltaphi < -pi) { deltaphi += twopi; }
     bool inrange = ( (rap-_rapjet)*(rap-_rapjet) +
                deltaphi*deltaphi <= _distance*_distance );
     return inrange; }
 
  /// return the minimal and maximal rapidity of this range
  virtual inline void get_rap_limits(double & rapmin, double & rapmax) const FASTJET_OVERRIDE {
     rapmin = _rapjet - _distance;
     rapmax = _rapjet + _distance; }
 
private:
  double _distance;
 
  /// value for phi that marks it as invalid
  const static double _invalid_phi = -1000.0;
  /// set internal phi so as to mark things as invalid
  void _set_invalid_rapphi() {_phijet = _invalid_phi;}
  /// true if rap,phi are valid (tests only phi)
  bool _rapphi_are_valid() const {return _phijet != _invalid_phi;}
};
 
FASTJET_END_NAMESPACE
 
#endif // __FASTJET_CIRCULARRANGE_HH__