fastjet::d0::inline_maths Namespace Reference

Functions
double	sqr (double a)
double	min (double a, double b)
double	delta_phi (double phi1, double phi2)
double	phi (double px, double py)
double	y (double E, double pz)
Variables
const double	PI = fabs(acos(-1.))
const double	TWOPI = 2*PI

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Function Documentation

double fastjet::d0::inline_maths::delta_phi	(	double	phi1,
		double	phi2
	)			[inline]

Definition at line 31 of file inline_maths.h.

References min(), and PI.

Referenced by fastjet::d0::RD2(), and fastjet::d0::RDelta().

                                                  {
  return min( double(fabs(phi1-phi2)), double(2.*PI-fabs(phi1-phi2)) );
}

double fastjet::d0::inline_maths::min	(	double	a,
		double	b
	)			[inline]

Definition at line 25 of file inline_maths.h.

Referenced by ClusterSequence::_CP2DChan_cluster(), ClusterSequence::_CP2DChan_cluster_2piMultD(), ClusterSequence::_CP2DChan_limited_cluster(), ClusterSequence::_do_ij_recombination_step(), ClusterSequence::_initialise_and_run(), fastjet::SearchTree< T >::_initialize(), ClusterSequence::_really_dumb_cluster(), delta_phi(), PseudoJet::kt_distance(), main(), fastjet::EECambridgePlugin::run_clustering(), and ClusterSequence::unique_history_order().

                                      {
  return (a < b) ? a : b;
}

double fastjet::d0::inline_maths::phi	(	double	px,
		double	py
	)			[inline]

Definition at line 37 of file inline_maths.h.

Referenced by RangeDefinition::_numerical_total_area(), fastjet::Dnn4piCylinder::_remap_phi(), fastjet::Dnn3piCylinder::_remap_phi(), fastjet::Dnn2piCylinder::_remap_phi(), fastjet::d0::ILConeAlgorithm< Item >makeClusters(), RangeDefinition::is_in_range(), fastjet::d0::ILConeAlgorithm< Item >::TemporaryJet::is_stable(), main(), fastjet::d0::P2phi(), fastjet::d0::HepEntity::phi(), print_jets(), and fastjet::CMSIterativeConePlugin::run_clustering().

                                        {
  return atan2(py, px);
}

double fastjet::d0::inline_maths::sqr

(

double

a

)

[inline]

Definition at line 19 of file inline_maths.h.

Referenced by fastjet::d0::HepEntity::pT().

                            {
  return a*a;
}

double fastjet::d0::inline_maths::y	(	double	E,
		double	pz
	)			[inline]

Definition at line 43 of file inline_maths.h.

Referenced by ClusterSequence::_really_dumb_cluster(), fastjet::Coord2D::distance2(), fastjet::d0::ILConeAlgorithm< Item >makeClusters(), fastjet::Point::operator*(), fastjet::Coord2D::operator*(), fastjet::Point::operator+(), fastjet::Coord2D::operator+(), fastjet::ClosestPair2D::Shuffle::operator+=(), fastjet::Point::operator-(), fastjet::Coord2D::operator-(), fastjet::Coord2D::operator/(), fastjet::d0::P2y(), and fastjet::d0::HepEntity::y().

                                     {
  errno=0;
  double y;
  //cout << "inline_maths: ";
  if (fabs(E-pz) == 0.) {
    //    cout << "Error in header mathe.h: division by 0 in function eta!" <<  " p=" << p << " pz=" << pz << endl;
    //  exit(721);
    errno=721;
    y = 99999.;
  }
  else {
    y = 0.5*log((E+pz)/(E-pz));
  }
  //cout << "y: E=" << E << " pz=" << pz << " y=" << y << endl;
  return y;
}

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Variable Documentation

const double fastjet::d0::inline_maths::PI = fabs(acos(-1.))

Definition at line 14 of file inline_maths.h.

Referenced by delta_phi(), and fastjet::d0::ILConeAlgorithm< Item >::TemporaryJet::midpoint().

const double fastjet::d0::inline_maths::TWOPI = 2*PI

Definition at line 16 of file inline_maths.h.

Referenced by fastjet::d0::ILConeAlgorithm< Item >::TemporaryJet::midpoint().