fastjet Namespace Reference

Namespaces
namespace	atlas
namespace	cms
namespace	d0
Classes
class	BasicRandom
class	BasicRandom< int >
class	BasicRandom< double >
	template specialization (double) for the BasicRandom template class. More...
class	ClosestPair2D
	concrete implementation for finding closest pairs in 2D -- will use Chan's (hopefully efficient) shuffle based structures More...
class	Coord2D
	class for representing 2d coordinates and carrying out some basic operations on them More...
class	ClosestPair2DBase
	abstract base class for finding closest pairs in 2D More...
class	Dnn2piCylinder
	class derived from DynamicNearestNeighbours that provides an implementation for the surface of cylinder (using one DnnPlane object spanning 0--2pi). More...
class	Dnn3piCylinder
	class derived from DynamicNearestNeighbours that provides an implementation for the surface of cylinder (using one DnnPlane object spanning 0--3pi). More...
class	Dnn4piCylinder
	class derived from DynamicNearestNeighbours that provides an implementation for the surface of cylinder (using two copies of DnnPlane, one running from 0--2pi, the other from pi--3pi). More...
class	DnnPlane
	class derived from DynamicNearestNeighbours that provides an implementation for the Euclidean plane More...
class	EtaPhi
	Shortcut for dealing with eta-phi coordinates. More...
class	DnnError
	class corresponding to errors that will be thrown by Dynamic Nearest Neighbours code More...
class	DynamicNearestNeighbours
	Abstract base class for quick location of nearest neighbours in a set of points, with facilities for adding and removing points from the set after initialisation. More...
class	MinHeap
	A class which provides a "heap"-like structure that allows access to a the minimal value of a dynamically changing set of numbers. More...
class	SearchTree
	This is the class for a search tree designed to be especially efficient when looking for successors and predecessors (to be used in Chan's CP algorithm). More...
struct	K
	the basic geometrical kernel that lies at the base of all CGAL operations More...
class	InitialisedInt
	A class to provide an "int" with an initial value. More...
class	Point
	class to handle a 2d point More...
class	GraphEdge
	handle an edge of the Voronoi Diagram. More...
class	Site
	structure used both for particle sites and for vertices. More...
class	Freenode
class	FreeNodeArrayList
class	Freelist
class	Edge
class	Halfedge
class	VoronoiDiagramGenerator
class	ATLASConePlugin
	ATLASConePlugin is a plugin for fastjet (v2.4 upwards). More...
class	CMSIterativeConePlugin
	CMSIterativeConePlugin is a plugin for fastjet (v2.4 upwards). More...
class	CDFJetCluPlugin
	a plugin for fastjet-v2.1 that provides an interface to the CDF jetclu algorithm More...
class	CDFMidPointPlugin
	CDFMidPointPlugin is a plugin for fastjet (v2.1 upwards) that provides an interface to the CDF version of Run-II iterative cone algorithm with midpoint seeds (also known as the Iterative Legacy Cone Algorithm, ILCA). More...
class	D0RunIIConePlugin
	D0RunIIConePlugin is a plugin for fastjet (v2.1 upwards) that provides an interface to the D0 version of Run-II iterative cone algorithm with midpoint seeds (also known as the Iterative Legacy Cone Algorithm, ILCA). More...
class	EECamBriefJet
	class to help run an e+e- Cambridge algorithm More...
class	EECambridgePlugin
	EECambridgePlugin is a plugin for fastjet (v2.4 upwards). More...
class	JadeBriefJet
	class to help run a JADE algorithm More...
class	JadePlugin
	JadePlugin is a plugin for fastjet (v2.4 upwards). More...
class	NestedDefsPlugin
	NestedAglsPlugin is a plugin for fastjet (v2.4 upwards) that, given a list of jet definitions, performs the clustering by feeding the particles to the first algorithm and then, successively feeding the output to the next algorithm in the list. More...
class	SISConeBasePlugin
	SISConeBasePlugin is a plugin for fastjet (v2.1 upwards) that provides a base interface to SISCone-type cone jet finder by Gregory Soyez and Gavin Salam. More...
class	SISConeBaseExtras
	Class that provides extra information about a SISCone clustering the only thing that needs to be done for thee derived classes is to define '_jet_def_plugin', implement jet_def_plugin(); and add the corresponding plugin class as a friend. More...
class	SISConePlugin
	SISConePlugin is a plugin for fastjet (v2.1 upwards) that provides an interface to the seedless infrared safe cone jet finder by Gregory Soyez and Gavin Salam. More...
class	SISConeExtras
	Class that provides extra information about a SISCone clustering. More...
class	SISConeSphericalPlugin
	SISConeSphericalPlugin is a plugin for fastjet (v2.1 upwards) that provides an interface to the seedless infrared safe cone jet finder by Gregory Soyez and Gavin Salam. More...
class	SISConeSphericalExtras
	Class that provides extra information about a SISCone clustering. More...
class	PxConePlugin
	PxConePlugin is a plugin for fastjet (v2.1 upwards) that provides an interface to the fortran pxcone iterative cone algorithm with midpoint seeds. More...
class	TrackJetParticlePtr
class	TrackJetPlugin
Typedefs
typedef CGAL::Triangulation_vertex_base_with_info_2 < InitialisedInt, K >	Vbb
typedef CGAL::Triangulation_hierarchy_vertex_base_2 < Vbb >	Vb
typedef CGAL::Triangulation_face_base_2 < K >	Fb
typedef CGAL::Triangulation_data_structure_2 < Vb, Fb >	Tds
typedef CGAL::Delaunay_triangulation_2 < K, Tds >	Dt
typedef CGAL::Triangulation_hierarchy_2 < Dt >	Triangulation
typedef Triangulation::Vertex_handle	Vertex_handle
typedef Triangulation::Point	Point
typedef Triangulation::Vertex_circulator	Vertex_circulator
	CGAL Point structure.
typedef Triangulation::Face_circulator	Face_circulator
typedef Triangulation::Face_handle	Face_handle
Functions
int	__default_random_generator (int *__iseed)
bool	floor_ln2_less (unsigned x, unsigned y)
	returns true if floor(ln_base2(x)) < floor(ln_base2(y)), using Chan's neat trick.
double	norm (const Point p)
	norm of a vector
double	vector_product (const Point &p1, const Point &p2)
	2D vector product
double	scalar_product (const Point &p1, const Point &p2)
	scalar product
int	scomp (const void *p1, const void *p2)
template<class T >
T	deltaPhi (T phi1, T phi2)
template<class T >
T	deltaR2 (T eta1, T phi1, T eta2, T phi2)
Variables
BasicRandom< int >	_G_random_int
BasicRandom< double >	_G_random_double
const double	pi = 3.141592653589793238462643383279502884197
const double	twopi = 6.283185307179586476925286766559005768394
const double	pisq = 9.869604401089358618834490999876151135314
const double	zeta2 = 1.644934066848226436472415166646025189219
const double	zeta3 = 1.202056903159594285399738161511449990765
const double	eulergamma = 0.577215664901532860606512090082402431042
const double	ln2 = 0.693147180559945309417232121458176568076
const int	INFINITE_VERTEX = -1
const int	NEW_VERTEX = -2
const double	HUGE_DOUBLE = 1e300

---

Typedef Documentation

typedef CGAL::Delaunay_triangulation_2<K,Tds> fastjet::Dt

Definition at line 85 of file Triangulation.hh.

typedef Triangulation::Face_circulator fastjet::Face_circulator

Definition at line 92 of file Triangulation.hh.

typedef Triangulation::Face_handle fastjet::Face_handle

Definition at line 93 of file Triangulation.hh.

typedef CGAL::Triangulation_face_base_2<K> fastjet::Fb

Definition at line 83 of file Triangulation.hh.

typedef Triangulation::Point fastjet::Point

Definition at line 90 of file Triangulation.hh.

typedef CGAL::Triangulation_data_structure_2<Vb,Fb> fastjet::Tds

Definition at line 84 of file Triangulation.hh.

typedef CGAL::Triangulation_hierarchy_2<Dt> fastjet::Triangulation

Definition at line 86 of file Triangulation.hh.

typedef CGAL::Triangulation_hierarchy_vertex_base_2<Vbb> fastjet::Vb

Definition at line 82 of file Triangulation.hh.

typedef CGAL::Triangulation_vertex_base_with_info_2<InitialisedInt,K> fastjet::Vbb

Definition at line 81 of file Triangulation.hh.

typedef Triangulation::Vertex_circulator fastjet::Vertex_circulator

CGAL Point structure.

Definition at line 91 of file Triangulation.hh.

typedef Triangulation::Vertex_handle fastjet::Vertex_handle

Definition at line 89 of file Triangulation.hh.

---

Function Documentation

int fastjet::__default_random_generator

(

int *

__iseed

)

Definition at line 31 of file BasicRandom.cc.

Referenced by fastjet::BasicRandom< double >::operator()(), and fastjet::BasicRandom< int >::operator()().

{
  int __k = __iseed[0]/53668;
  __iseed[0] = (__iseed[0] - __k*53668)*40014 - __k*12211;
  if(__iseed[0] < 0) __iseed[0] += 2147483563;
  
  __k = __iseed[1]/52774;
  __iseed[1] = (__iseed[1] - __k*52774)*40692 - __k*3791;
  if(__iseed[1] < 0) __iseed[1] += 2147483399;
  
  int __iz = __iseed[0] - __iseed[1];
  if(__iz < 1) __iz += 2147483562;
  
  return __iz;
}

template<class T >

T fastjet::deltaPhi	(	T	phi1,
		T	phi2
	)			[inline]

Definition at line 51 of file CMSIterativeConePlugin.cc.

References M_PI.

Referenced by fastjet::atlas::JetDistances::deltaR(), and deltaR2().

                            { 
  T result = phi1 - phi2;
  while (result > M_PI) result -= 2*M_PI;
  while (result <= -M_PI) result += 2*M_PI;
  return result;
}

template<class T >

T fastjet::deltaR2	(	T	eta1,
		T	phi1,
		T	eta2,
		T	phi2
	)			[inline]

Definition at line 59 of file CMSIterativeConePlugin.cc.

References deltaPhi().

Referenced by fastjet::CMSIterativeConePlugin::run_clustering().

                                           {
  T deta = eta1 - eta2;
  T dphi = deltaPhi (phi1, phi2);
  return deta*deta + dphi*dphi;
}

bool fastjet::floor_ln2_less	(	unsigned	x,
		unsigned	y
	)			[inline]

returns true if floor(ln_base2(x)) < floor(ln_base2(y)), using Chan's neat trick.

..

Definition at line 212 of file ClosestPair2D.hh.

                                                   {
  if (x>y) return false;
  return (x < (x^y)); // beware of operator precedence...
}

double fastjet::norm

(

const Point

p

)

[inline]

norm of a vector

Definition at line 107 of file Voronoi.hh.

References fastjet::Point::x, and fastjet::Point::y.

Referenced by ClusterSequence::_bj_set_jetinfo(), fastjet::JadeBriefJet::init(), and fastjet::EECamBriefJet::init().

                                 {
  return p.x*p.x+p.y*p.y;
}

double fastjet::scalar_product	(	const Point &	p1,
		const Point &	p2
	)			[inline]

scalar product

Definition at line 119 of file Voronoi.hh.

References fastjet::Point::x, and fastjet::Point::y.

                                                              {
  return p1.x*p2.x+p1.y*p2.y;
}

int fastjet::scomp	(	const void *	p1,
		const void *	p2
	)

Definition at line 1042 of file Voronoi.cc.

References fastjet::Point::x, and fastjet::Point::y.

{
  Point *s1 = (Point*)p1, *s2=(Point*)p2;
  if(s1->y < s2->y) return(-1);
  if(s1->y > s2->y) return(1);
  if(s1->x < s2->x) return(-1);
  if(s1->x > s2->x) return(1);
  return(0);
}

double fastjet::vector_product	(	const Point &	p1,
		const Point &	p2
	)			[inline]

2D vector product

Definition at line 113 of file Voronoi.hh.

References fastjet::Point::x, and fastjet::Point::y.

                                                              {
  return p1.x*p2.y-p1.y*p2.x;
}

---

Variable Documentation

BasicRandom<double> fastjet::_G_random_double

Definition at line 49 of file BasicRandom.cc.

BasicRandom<int> fastjet::_G_random_int

Definition at line 48 of file BasicRandom.cc.

const double fastjet::eulergamma = 0.577215664901532860606512090082402431042

Definition at line 47 of file numconsts.hh.

const double fastjet::HUGE_DOUBLE = 1e300

Definition at line 56 of file Triangulation.hh.

const int fastjet::INFINITE_VERTEX = -1

Definition at line 54 of file Triangulation.hh.

const double fastjet::ln2 = 0.693147180559945309417232121458176568076

Definition at line 48 of file numconsts.hh.

const int fastjet::NEW_VERTEX = -2

Definition at line 55 of file Triangulation.hh.

Referenced by fastjet::InitialisedInt::InitialisedInt().

const double fastjet::pi = 3.141592653589793238462643383279502884197

Definition at line 42 of file numconsts.hh.

Referenced by ClusterSequence::_bj_dist(), ClusterSequence::_CP2DChan_limited_cluster(), ClusterSequence::_initialise_and_run(), fastjet::Dnn4piCylinder::_remap_phi(), fastjet::Dnn3piCylinder::_remap_phi(), fastjet::Dnn2piCylinder::_remap_phi(), CircularRange::CircularRange(), PseudoJet::delta_phi_to(), CircularRange::is_in_range(), JetDefinition::JetDefinition(), PseudoJet::kt_distance(), ClusterSequenceAreaBase::n_empty_jets(), PseudoJet::phi_std(), PseudoJet::plain_distance(), PseudoJet::pseudorapidity(), and JetDefinition::DefaultRecombiner::recombine().

const double fastjet::pisq = 9.869604401089358618834490999876151135314

Definition at line 44 of file numconsts.hh.

const double fastjet::twopi = 6.283185307179586476925286766559005768394

Definition at line 43 of file numconsts.hh.

Referenced by main().

const double fastjet::zeta2 = 1.644934066848226436472415166646025189219

Definition at line 45 of file numconsts.hh.

const double fastjet::zeta3 = 1.202056903159594285399738161511449990765

Definition at line 46 of file numconsts.hh.