AreaDefinition.hh

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//STARTHEADER
// $Id: AreaDefinition.hh 635 2007-05-10 18:37:10Z salam $
//
// Copyright (c) 2006-2007, Matteo Cacciari, Gavin Salam and Gregory Soyez
//
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// This file is part of FastJet.
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#ifndef __FASTJET_AREADEFINITION_HH__
#define __FASTJET_AREADEFINITION_HH__

#include "fastjet/GhostedAreaSpec.hh"

FASTJET_BEGIN_NAMESPACE      // defined in fastjet/internal/base.hh

//----------------------------------------------------------------------
//
class VoronoiAreaSpec {
public:

  VoronoiAreaSpec() : _effective_Rfact(1.0) {};
  
  VoronoiAreaSpec(double effective_Rfact) : 
    _effective_Rfact(effective_Rfact) {};

  double effective_Rfact() const {return _effective_Rfact;}

  std::string description() const;

private:
  double _effective_Rfact;
};


enum AreaType {invalid_area = -1, 
               active_area = 0, active_area_explicit_ghosts = 1,
               one_ghost_passive_area = 10, passive_area = 11, 
               voronoi_area=20};


//----------------------------------------------------------------------
class AreaDefinition {
public:
  
  AreaDefinition() {
    _area_type  = active_area;
    _ghost_spec = GhostedAreaSpec();
  }

  AreaDefinition(AreaType type, const GhostedAreaSpec & spec) {
    _ghost_spec = spec;
    _area_type   = type;
    assert(type != voronoi_area);
  }

  AreaDefinition(AreaType type, const VoronoiAreaSpec & spec) {
    _voronoi_spec = spec;
    _area_type   = type;
    assert(type == voronoi_area);
  }

  AreaDefinition(AreaType type) {
    _area_type   = type;
    if (type == voronoi_area) {
      _voronoi_spec = VoronoiAreaSpec();
    } else {
      _ghost_spec = GhostedAreaSpec();
    }
  }

  AreaDefinition(const GhostedAreaSpec & spec, AreaType type = active_area) {
    _ghost_spec = spec;
    _area_type   = type;
    assert(type != voronoi_area);
  }

  AreaDefinition(const VoronoiAreaSpec & spec) {
    _voronoi_spec = spec;
    _area_type    = voronoi_area;
  }

  std::string description() const;

  AreaType area_type() const {return _area_type;}

  const GhostedAreaSpec  & ghost_spec()  const {return _ghost_spec;}
  GhostedAreaSpec & ghost_spec()  {return _ghost_spec;}

  const VoronoiAreaSpec & voronoi_spec() const {return _voronoi_spec;}
  
private:

  AreaType        _area_type;
  GhostedAreaSpec  _ghost_spec;
  VoronoiAreaSpec _voronoi_spec;
};

FASTJET_END_NAMESPACE        // defined in fastjet/internal/base.hh


#endif // __FASTJET_AREADEFINITION_HH__