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AreaDefinition.hh
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30 
31 
32 #ifndef __FASTJET_AREADEFINITION_HH__
33 #define __FASTJET_AREADEFINITION_HH__
34 
35 #include "fastjet/GhostedAreaSpec.hh"
36 
37 FASTJET_BEGIN_NAMESPACE // defined in fastjet/internal/base.hh
38 
39 //----------------------------------------------------------------------
40 //
41 /// @ingroup area_classes
42 /// \class VoronoiAreaSpec
43 /// Specification for the computation of the Voronoi jet area
44 ///
45 /// class for holding a "Voronoi area" specification; an area will be
46 /// assigned to each particle, which is the area of the intersection
47 /// of the particle's Voronoi cell with a circle of radius
48 /// R*effective_Rfact.
49 ///
51 public:
52 
53  /// default constructor (effective_Rfact = 1);
54  VoronoiAreaSpec() : _effective_Rfact(1.0) {};
55 
56  /// constructor that allows you to set effective_Rfact.
57  VoronoiAreaSpec(double effective_Rfact_in) :
58  _effective_Rfact(effective_Rfact_in) {};
59 
60  /// return the value of effective_Rfact
61  double effective_Rfact() const {return _effective_Rfact;}
62 
63  /// return a textual description of the area definition.
64  std::string description() const;
65 
66 private:
67  double _effective_Rfact;
68 };
69 
70 
71 /// the different types of area that are supported
72 enum AreaType {invalid_area = -1,
73  active_area = 0, active_area_explicit_ghosts = 1,
74  one_ghost_passive_area = 10, passive_area = 11,
75  voronoi_area=20};
76 
77 
78 //----------------------------------------------------------------------
79 /// @ingroup area_classes
80 /// \class AreaDefinition
81 /// class that holds a generic area definition
83 public:
84 
85  /// default constructor, which provides a ghosted active area, with
86  /// sensible defaults for the ghosts.
88  _area_type = active_area;
89  _ghost_spec = GhostedAreaSpec();
90  }
91 
92  /// constructor for an area definition based on an area type and a
93  /// ghosted area specification
94  AreaDefinition(AreaType type, const GhostedAreaSpec & spec) {
95  _ghost_spec = spec;
96  _area_type = type;
97  assert(type != voronoi_area);
98  }
99 
100  /// constructor for an area definition based on an area type and a
101  /// voronoi area specification (type must be voronoi_area)
103  _voronoi_spec = spec;
104  _area_type = type;
105  assert(type == voronoi_area);
106  }
107 
108  /// constructor for an area definition based on an area type and
109  /// which attempts to provide sensible defaults for everything else
111  _area_type = type;
112  if (type == voronoi_area) {
113  _voronoi_spec = VoronoiAreaSpec();
114  } else {
115  _ghost_spec = GhostedAreaSpec();
116  }
117  }
118 
119  /// constructor for an area definition based on an ghosted area
120  /// specification, and an option to select which ghosted area you want
121  AreaDefinition(const GhostedAreaSpec & spec, AreaType type = active_area) {
122  _ghost_spec = spec;
123  _area_type = type;
124  assert(type != voronoi_area);
125  }
126 
127  /// constructor for an area definition based on a voronoi area
128  /// specification
130  _voronoi_spec = spec;
131  _area_type = voronoi_area;
132  }
133 
134  /// return a description of the current area definition
135  std::string description() const;
136 
137  /// return info about the type of area being used by this defn
138  AreaType area_type() const {return _area_type;}
139 
140  /// return a reference to the active area spec
141  const GhostedAreaSpec & ghost_spec() const {return _ghost_spec;}
142  GhostedAreaSpec & ghost_spec() {return _ghost_spec;}
143 
144  /// return a reference to the voronoi area spec
145  const VoronoiAreaSpec & voronoi_spec() const {return _voronoi_spec;}
146 
147 private:
148 
149  AreaType _area_type;
150  GhostedAreaSpec _ghost_spec;
151  VoronoiAreaSpec _voronoi_spec;
152 };
153 
154 FASTJET_END_NAMESPACE // defined in fastjet/internal/base.hh
155 
156 
157 #endif // __FASTJET_AREADEFINITION_HH__
AreaType area_type() const
return info about the type of area being used by this defn
AreaDefinition(AreaType type, const GhostedAreaSpec &spec)
constructor for an area definition based on an area type and a ghosted area specification ...
AreaDefinition(AreaType type)
constructor for an area definition based on an area type and which attempts to provide sensible defau...
AreaDefinition(const GhostedAreaSpec &spec, AreaType type=active_area)
constructor for an area definition based on an ghosted area specification, and an option to select wh...
AreaDefinition()
default constructor, which provides a ghosted active area, with sensible defaults for the ghosts...
double effective_Rfact() const
return the value of effective_Rfact
class that holds a generic area definition
AreaDefinition(AreaType type, const VoronoiAreaSpec &spec)
constructor for an area definition based on an area type and a voronoi area specification (type must ...
const GhostedAreaSpec & ghost_spec() const
return a reference to the active area spec
const VoronoiAreaSpec & voronoi_spec() const
return a reference to the voronoi area spec
VoronoiAreaSpec()
default constructor (effective_Rfact = 1);
Specification for the computation of the Voronoi jet area.
VoronoiAreaSpec(double effective_Rfact_in)
constructor that allows you to set effective_Rfact.
AreaDefinition(const VoronoiAreaSpec &spec)
constructor for an area definition based on a voronoi area specification
Parameters to configure the computation of jet areas using ghosts.
AreaType
the different types of area that are supported