genie::PhysInteractionSelector Class Reference

Selects interactions to be generated. More...

#include <PhysInteractionSelector.h>

Inheritance diagram for genie::PhysInteractionSelector:

Public Member Functions
	PhysInteractionSelector ()
	PhysInteractionSelector (string config)
	~PhysInteractionSelector ()
EventRecord *	SelectInteraction (const InteractionGeneratorMap *igmp, const TLorentzVector &p4) const
	implement the InteractionSelectorI interface More...
void	Configure (const Registry &config)
void	Configure (string param_set)
Public Member Functions inherited from genie::InteractionSelectorI
virtual	~InteractionSelectorI ()
Public Member Functions inherited from genie::Algorithm
virtual	~Algorithm ()
virtual void	FindConfig (void)
virtual const Registry &	GetConfig (void) const
Registry *	GetOwnedConfig (void)
virtual const AlgId &	Id (void) const
	Get algorithm ID. More...
virtual AlgStatus_t	GetStatus (void) const
	Get algorithm status. More...
virtual bool	AllowReconfig (void) const
virtual AlgCmp_t	Compare (const Algorithm *alg) const
	Compare with input algorithm. More...
virtual void	SetId (const AlgId &id)
	Set algorithm ID. More...
virtual void	SetId (string name, string config)
const Algorithm *	SubAlg (const RgKey &registry_key) const
void	AdoptConfig (void)
void	AdoptSubstructure (void)
virtual void	Print (ostream &stream) const
	Print algorithm info. More...

Private Member Functions
void	LoadConfigData (void)

Private Attributes
bool	fUseSplines

Additional Inherited Members
Static Public Member Functions inherited from genie::Algorithm
static string	BuildParamVectKey (const std::string &comm_name, unsigned int i)
static string	BuildParamVectSizeKey (const std::string &comm_name)
Protected Member Functions inherited from genie::InteractionSelectorI
	InteractionSelectorI ()
	InteractionSelectorI (string name)
	InteractionSelectorI (string name, string config)
Protected Member Functions inherited from genie::Algorithm
	Algorithm ()
	Algorithm (string name)
	Algorithm (string name, string config)
void	Initialize (void)
void	DeleteConfig (void)
void	DeleteSubstructure (void)
Registry *	ExtractLocalConfig (const Registry &in) const
Registry *	ExtractLowerConfig (const Registry &in, const string &alg_key) const
	Split an incoming configuration Registry into a block valid for the sub-algo identified by alg_key. More...
template<class T >
bool	GetParam (const RgKey &name, T &p, bool is_top_call=true) const
template<class T >
bool	GetParamDef (const RgKey &name, T &p, const T &def) const
template<class T >
int	GetParamVect (const std::string &comm_name, std::vector< T > &v, bool is_top_call=true) const
	Handle to load vectors of parameters. More...
int	GetParamVectKeys (const std::string &comm_name, std::vector< RgKey > &k, bool is_top_call=true) const
int	AddTopRegistry (Registry *rp, bool owns=true)
	add registry with top priority, also update ownership More...
int	AddLowRegistry (Registry *rp, bool owns=true)
	add registry with lowest priority, also update ownership More...
int	MergeTopRegistry (const Registry &r)
int	AddTopRegisties (const vector< Registry * > &rs, bool owns=false)
	Add registries with top priority, also udated Ownerships. More...
Protected Attributes inherited from genie::Algorithm
bool	fAllowReconfig
bool	fOwnsSubstruc
	true if it owns its substructure (sub-algs,...) More...
AlgId	fID
	algorithm name and configuration set More...
vector< Registry * >	fConfVect
vector< bool >	fOwnerships
	ownership for every registry in fConfVect More...
AlgStatus_t	fStatus
	algorithm execution status More...
AlgMap *	fOwnedSubAlgMp
	local pool for owned sub-algs (taken out of the factory pool) More...

Detailed Description

Selects interactions to be generated.

Is a concrete implementation of the InteractionSelectorI interface.

Author

Costas Andreopoulos <constantinos.andreopoulos cern.ch> University of Liverpool & STFC Rutherford Appleton Laboratory

January 25, 2005

Copyright (c) 2003-2020, The GENIE Collaboration For the full text of the license visit http://copyright.genie-mc.org

Definition at line 27 of file PhysInteractionSelector.h.

Constructor & Destructor Documentation

PhysInteractionSelector::PhysInteractionSelector

(

)

Definition at line 42 of file PhysInteractionSelector.cxx.

                                                 :
InteractionSelectorI("genie::PhysInteractionSelector")
{

}

PhysInteractionSelector::PhysInteractionSelector

(

string

config

)

Definition at line 48 of file PhysInteractionSelector.cxx.

                                                              :
InteractionSelectorI("genie::PhysInteractionSelector", config)
{

}

PhysInteractionSelector::~PhysInteractionSelector

(

)

Definition at line 54 of file PhysInteractionSelector.cxx.

{

}

Member Function Documentation

void PhysInteractionSelector::Configure ( const Registry &  config )

virtual

override the Algorithm::Configure methods to load configuration data to private data members

Reimplemented from genie::Algorithm.

Definition at line 205 of file PhysInteractionSelector.cxx.

{
  Algorithm::Configure(config);
  this->LoadConfigData();
}

void PhysInteractionSelector::Configure ( string  config )

virtual

Configure the algorithm from the AlgoConfigPool based on param_set string given in input An algorithm contains a vector of registries coming from different xml configuration files, which are loaded according a very precise prioriy This methods will load a number registries in order of priority: 1) "Tunable" parameter set from CommonParametes. This is loaded with the highest prioriry and it is designed to be used for tuning procedure Usage not expected from the user. 2) For every string defined in "CommonParame" the corresponding parameter set will be loaded from CommonParameter.xml 3) parameter set specified by the config string and defined in the xml file of the algorithm 4) if config is not "Default" also the Default parameter set from the same xml file will be loaded Effectively this avoids the repetion of a parameter when it is not changed in the requested configuration

Reimplemented from genie::Algorithm.

Definition at line 211 of file PhysInteractionSelector.cxx.

{
  Algorithm::Configure(param_set);
  this->LoadConfigData();
}

void PhysInteractionSelector::LoadConfigData ( void  )

private

Definition at line 217 of file PhysInteractionSelector.cxx.

{
  //check whether the user prefers the cross sections to be calculated or
  //evaluated from a spline object constructed at the job initialization
  fUseSplines = false ;
  GetParam( "UseStoredXSecs", fUseSplines ) ;

}

EventRecord * PhysInteractionSelector::SelectInteraction ( const InteractionGeneratorMap *  igmp, const TLorentzVector &  p4  ) const

virtual

implement the InteractionSelectorI interface

Implements genie::InteractionSelectorI.

Definition at line 60 of file PhysInteractionSelector.cxx.

{
  if(!igmap) {
     LOG("IntSel", pERROR)
        << "\n*** NULL InteractionGeneratorMap! Can't select interaction";
     return 0;
  }
  if(igmap->size() <= 0) {
     LOG("IntSel", pERROR)
       << "\n*** Empty InteractionGeneratorMap! Can't select interaction";
     return 0;
  }

  // Get the list of spline objects
  // Should have been constructed at the job initialization
  XSecSplineList * xssl = 0;
  if (fUseSplines) xssl = XSecSplineList::Instance();

  const InteractionList & ilst = igmap->GetInteractionList();
  vector<double> xseclist(ilst.size());

  string istate = ilst[0]->InitState().AsString();
  ostringstream msg;
  msg << "Selecting an interaction for the given initial state = "
      << istate << " at E = " << p4.E() << " GeV";

  LOG("IntSel", pNOTICE)
             << utils::print::PrintFramedMesg(msg.str(), 0, '=');
  LOG("IntSel", pNOTICE)
     << "Computing xsecs for all relevant modeled interactions:";

  unsigned int i=0;
  InteractionList::const_iterator intliter = ilst.begin();

  ostringstream xsec_table_printout;

  xsec_table_printout
      << " |"  << setfill('-') << setw(112) << "|" << endl
      << " | " << setfill(' ') << setw(80) << "interaction"
      << " | cross-section (1E-38*cm^2) |" << endl
      << " |"  << setfill('-') << setw(112) << "|" << endl;

  for( ; intliter != ilst.end(); ++intliter) {

     Interaction * interaction = new Interaction(**intliter);
     interaction->InitStatePtr()->SetProbeP4(p4);

     SLOG("IntSel", pDEBUG)
           << "Computing xsec for: \n  " << interaction->AsString();

     // get the cross section for this interaction
     const XSecAlgorithmI * xsec_alg =
               igmap->FindGenerator(interaction)->CrossSectionAlg();
     assert(xsec_alg);

     double xsec = 0; // cross section for this interaction

     bool spline_computed = xssl->SplineExists(xsec_alg, interaction);
     bool eval = fUseSplines && spline_computed;
     if (eval) {
           const InitialState & init = interaction->InitState();
           const ProcessInfo & proc  = interaction->ProcInfo();
           double E = init.ProbeE(kRfLab);
           if(TMath::IsNaN(E)) {
                 BLOG("IntSel", pFATAL) << *interaction;
                 BLOG("IntSel", pFATAL) << "E = " << E;
                 abort();
           }
           const Spline * spl = xssl->GetSpline(xsec_alg,interaction);
           if(spl->ClosestKnotValueIsZero(E,"-")) xsec = 0;
           else xsec = spl->Evaluate(E);
     } else {
           xsec = xsec_alg->Integral(interaction);
     }
     TMath::Max(0., xsec);
/*
     LOG("IntSel", pNOTICE)
       << interaction->AsString()
       << " --> xsec " << (eval ? "[**interp**]" : "[**calc**]")
       << " = " << xsec/genie::units::cm2 << " cm^2";
*/
     xsec_table_printout
           << " | " << setfill(' ') << setw(80) << interaction->AsString()
           << " | " << setfill(' ') << setw(26) << xsec/(1E-38*genie::units::cm2)
           << " | " << endl;

     xseclist[i++] = xsec;
     delete interaction;

  } // loop over interaction that can be generated

  xsec_table_printout
      << " |"  << setfill('-') << setw(112) << "|" << endl;

  LOG("IntSel", pNOTICE)
    << "\n" << xsec_table_printout.str();

  // select an interaction

  LOG("IntSel", pINFO)
            << "Selecting an entry from the Interaction List";
  double xsec_sum  = 0;
  for(unsigned int iint = 0; iint < xseclist.size(); iint++) {
     xsec_sum       += xseclist[iint];
     xseclist[iint]  = xsec_sum;

     SLOG("IntSel", pINFO)
             << "Sum{xsec}(0->" << iint << ") = " << xsec_sum;
  }
  RandomGen * rnd = RandomGen::Instance();
  double R = xsec_sum * rnd->RndISel().Rndm();

  LOG("IntSel", pINFO)
      << "Generating Rndm (0. -> max = " << xsec_sum << ") = " << R;

  for(unsigned int iint = 0; iint < xseclist.size(); iint++) {

     SLOG("IntSel", pDEBUG)
               << "Sum{xsec}(0->" << iint <<") = " << xseclist[iint];

     if( R < xseclist[iint] ) {
       Interaction * selected_interaction = new Interaction (*ilst[iint]);
       selected_interaction->InitStatePtr()->SetProbeP4(p4);

       // set the cross section for the selected interaction (just extract it
       // from the array of summed xsecs rather than recomputing it)
       double xsec_pedestal = (iint > 0) ? xseclist[iint-1] : 0.;
       double xsec = xseclist[iint] - xsec_pedestal;
       assert(xsec>0);

       LOG("IntSel", pNOTICE)
         << "Selected interaction: " << selected_interaction->AsString();

       // bootstrap the event record
       EventRecord * evrec = new EventRecord;
       evrec->AttachSummary(selected_interaction);
       evrec->SetXSec(xsec);

       return evrec;
     }
  }
  LOG("IntSel", pERROR) << "Could not select interaction";
  return 0;
}

Member Data Documentation

bool genie::PhysInteractionSelector::fUseSplines

private

Definition at line 46 of file PhysInteractionSelector.h.

---

The documentation for this class was generated from the following files:

• Generator/src/Framework/EventGen/PhysInteractionSelector.h
• Generator/src/Framework/EventGen/PhysInteractionSelector.cxx