DipoleSplittingReweight.h

// -*- C++ -*-
//
// DipoleSplittingReweight.h is a part of Herwig - A multi-purpose Monte Carlo event generator
// Copyright (C) 2002-2019 The Herwig Collaboration
//
// Herwig is licenced under version 3 of the GPL, see COPYING for details.
// Please respect the MCnet academic guidelines, see GUIDELINES for details.
//
#ifndef HERWIG_DipoleSplittingReweight_H
#define HERWIG_DipoleSplittingReweight_H
//
// This is the declaration of the DipoleSplittingReweight class.
//
 
#include "ThePEG/Handlers/HandlerBase.h"
#include "DipoleSplittingInfo.h"
 
#include "Herwig/Shower/Dipole/DipoleShowerHandler.fh"
 
namespace Herwig {
 
using namespace ThePEG;
 
class DipoleSplittingReweight: public HandlerBase {
 
public:
 
  DipoleSplittingReweight();
 
  virtual ~DipoleSplittingReweight();
 
public:
 
  virtual bool firstInteraction() const { return true; }
 
  virtual bool secondaryInteractions() const { return false; }
 
  void updateCurrentHandler();
 
  Ptr<DipoleShowerHandler>::tptr currentHandler() const;
 
  virtual double evaluate(const DipoleSplittingInfo&) const = 0;
 
  virtual double hint(const DipoleSplittingInfo&) const {
    return 1.;
  }
 
  virtual bool hintOnly(const DipoleSplittingInfo&) const {
    return false;
  }
 
  virtual void reweightFactor(const double) {
    return;
  }
 
  virtual void negativeScaling(const double) {
    return;
  }
 
public:
 
  void persistentOutput(PersistentOStream & os) const;
 
  void persistentInput(PersistentIStream & is, int version);
 
  static void Init();
 
// If needed, insert declarations of virtual function defined in the
// InterfacedBase class here (using ThePEG-interfaced-decl in Emacs).
 
private:
 
  static AbstractClassDescription<DipoleSplittingReweight> initDipoleSplittingReweight;
 
  DipoleSplittingReweight & operator=(const DipoleSplittingReweight &) = delete;
 
  Ptr<DipoleShowerHandler>::tptr theCurrentHandler;
 
};
 
}
 
#include "ThePEG/Utilities/ClassTraits.h"
 
namespace ThePEG {
 
template <>
struct BaseClassTrait<Herwig::DipoleSplittingReweight,1> {
  typedef HandlerBase NthBase;
};
 
template <>
struct ClassTraits<Herwig::DipoleSplittingReweight>
  : public ClassTraitsBase<Herwig::DipoleSplittingReweight> {
  static string className() { return "Herwig::DipoleSplittingReweight"; }
  static string library() { return "HwDipoleShower.so"; }
};
 
}
 
#endif /* HERWIG_DipoleSplittingReweight_H */