#include <EcalPreshowerRecHitsMaker.h>

Public Member Functions
	EcalPreshowerRecHitsMaker (edm::ParameterSet const &p, const RandomEngine *random)

void	init (const edm::EventSetup &es)

void	loadEcalPreshowerRecHits (edm::Event &iEvent, ESRecHitCollection &esRecHits)

	~EcalPreshowerRecHitsMaker ()

Private Member Functions
void	clean ()

unsigned	createVectorsOfCells (const edm::EventSetup &es)

void	Fill (uint32_t id, float energy, std::map< uint32_t, std::pair< float, bool > > &myHits, bool signal=true)

void	loadPCaloHits (const edm::Event &iEvent)

void	noisify ()

void	noisifySignal (std::map< uint32_t, std::pair< float, bool > > &theMap)

void	noisifySubdet (std::map< uint32_t, std::pair< float, bool > > &theMap, const std::vector< uint32_t > &thecells, unsigned ncells)

Private Attributes
std::map< uint32_t, std::pair < float, bool > >	ecalsRecHits_

std::vector< uint32_t >	escells_

bool	initialized_

edm::InputTag	inputCol_

const GaussianTail *	myGaussianTailGenerator_

unsigned	ncells_

double	noise_

double	preshowerHotFraction_

const RandomEngine *	random_

double	threshold_

Detailed Description

Definition at line 21 of file EcalPreshowerRecHitsMaker.h.

Constructor & Destructor Documentation

EcalPreshowerRecHitsMaker::EcalPreshowerRecHitsMaker	(	edm::ParameterSet const &	p,
		const RandomEngine *	random
	)

Definition at line 19 of file EcalPreshowerRecHitsMaker.cc.

References edm::ParameterSet::getParameter(), initialized_, inputCol_, myGaussianTailGenerator_, noise_, preshowerHotFraction_, random_, mathSSE::sqrt(), and threshold_.

   :
   random_(myrandom),
   myGaussianTailGenerator_(0)
 {
   edm::ParameterSet RecHitsParameters 
     = p.getParameter<edm::ParameterSet>("ECALPreshower");
   noise_ = RecHitsParameters.getParameter<double>("Noise");
   threshold_ = RecHitsParameters.getParameter<double>("Threshold");
   inputCol_=RecHitsParameters.getParameter<edm::InputTag>("MixedSimHits");
 
   initialized_=false;
 
   Genfun::Erf myErf;
   if(  noise_>0. ) {
     preshowerHotFraction_ = 0.5-0.5*myErf(threshold_/noise_/sqrt(2.));
     myGaussianTailGenerator_ = new GaussianTail(random_, noise_, threshold_);
   } else {
     preshowerHotFraction_ =0.;
   }
 }

EcalPreshowerRecHitsMaker::~EcalPreshowerRecHitsMaker ( )

Definition at line 43 of file EcalPreshowerRecHitsMaker.cc.

References initialized_, and myGaussianTailGenerator_.

 {
   initialized_=false;
   delete myGaussianTailGenerator_;
 }

Member Function Documentation

void EcalPreshowerRecHitsMaker::clean ( )

private

Definition at line 49 of file EcalPreshowerRecHitsMaker.cc.

References ecalsRecHits_.

Referenced by loadPCaloHits().

 {
 
   ecalsRecHits_.clear();
 }

unsigned EcalPreshowerRecHitsMaker::createVectorsOfCells ( const edm::EventSetup & es )

private

Definition at line 107 of file EcalPreshowerRecHitsMaker.cc.

References DetId::Ecal, EcalPreshower, escells_, relativeConstraints::geom, edm::EventSetup::get(), CaloSubdetectorGeometry::getValidDetIds(), i, and pileupDistInMC::total.

Referenced by init().

 {
     edm::ESHandle<CaloGeometry> pG;
     es.get<CaloGeometryRecord>().get(pG);     
     unsigned total=0;
 
     escells_.reserve(137728);
 
     const CaloSubdetectorGeometry* geom=pG->getSubdetectorGeometry(DetId::Ecal,EcalPreshower);  
     if(geom==0) return 0;
     const std::vector<DetId>& ids(geom->getValidDetIds(DetId::Ecal,EcalPreshower));  
     for (std::vector<DetId>::const_iterator i=ids.begin(); i!=ids.end(); i++) 
       {
     escells_.push_back(i->rawId());
     ++total;
       }
     return escells_.size();
 }

void EcalPreshowerRecHitsMaker::Fill	(	uint32_t	id,
		float	energy,
		std::map< uint32_t, std::pair< float, bool > > &	myHits,
		bool	signal = `true`
	)

private

Definition at line 169 of file EcalPreshowerRecHitsMaker.cc.

References relval_parameters_module::energy, RandomEngine::gaussShoot(), errorMatrix2Lands_multiChannel::id, noise_, and random_.

Referenced by loadPCaloHits().

 {
   // The signal hits are singletons (no need to look into a map)
   if(signal)
     {
       // a new hit is created
       // we can give a hint for the insert
       // Add the noise at this point. We are sure that it won't be added several times
       energy += random_->gaussShoot(0.,noise_);
       std::pair<float,bool> hit(energy,false); 
       // if it is signal, it is already ordered, so we can give a hint for the 
       // insert
       if(signal)
     myHits.insert(myHits.end(),std::pair<uint32_t,std::pair<float,bool> >(id,hit));
     }
   else       // In this case,there is a risk of duplication. Need to look into the map
     {
       std::map<uint32_t,std::pair<float,bool> >::iterator itcheck=myHits.find(id);
       if(itcheck==myHits.end())
     {
       energy += random_->gaussShoot(0.,noise_);
       std::pair<float,bool> hit(energy,false);    
       myHits.insert(std::pair<uint32_t,std::pair<float,bool> >(id,hit));
     }
       else
     {
       itcheck->second.first += energy;
     }
     }  
 }

void EcalPreshowerRecHitsMaker::init ( const edm::EventSetup & es )

Definition at line 99 of file EcalPreshowerRecHitsMaker.cc.

References createVectorsOfCells(), initialized_, and ncells_.

Referenced by CaloRecHitsProducer::beginRun().

 {
   if(initialized_) return;
   ncells_=createVectorsOfCells(es);
   edm::LogInfo("CaloRecHitsProducer") << "Total number of cells in Preshower " << ncells_ << std::endl;
   initialized_=true;
 }

void EcalPreshowerRecHitsMaker::loadEcalPreshowerRecHits	(	edm::Event &	iEvent,
		ESRecHitCollection &	esRecHits
	)

Definition at line 56 of file EcalPreshowerRecHitsMaker.cc.

References cond::rpcobgas::detid, ecalsRecHits_, loadPCaloHits(), myGaussianTailGenerator_, ncells_, noisify(), edm::SortedCollection< T, SORT >::push_back(), and threshold_.

Referenced by CaloRecHitsProducer::produce().

 {
   // if no preshower, do nothing
 
   if(ncells_==0) return;
   loadPCaloHits(iEvent);
   if( myGaussianTailGenerator_ ) noisify();
 
   std::map<uint32_t,std::pair<float,bool> >::const_iterator 
     it=ecalsRecHits_.begin();
   std::map<uint32_t,std::pair<float,bool> >::const_iterator 
     itend=ecalsRecHits_.end();
 
   for(;it!=itend;++it)
     {
       // check if the hit has been killed 
       if(it->second.second) continue;
       // check if it is above the threshold
       if(it->second.first<threshold_) continue;
       ESDetId detid(it->first);
       //  std::cout << detid << " " << it->second.first << std::endl;
       ecalHits.push_back(EcalRecHit(detid,it->second.first,0.)); 
     }
 }

void EcalPreshowerRecHitsMaker::loadPCaloHits ( const edm::Event & iEvent )

private

Definition at line 81 of file EcalPreshowerRecHitsMaker.cc.

References clean(), ecalsRecHits_, Fill(), edm::Event::getByLabel(), inputCol_, and edm::Handle< T >::product().

Referenced by loadEcalPreshowerRecHits().

 {
 
   clean();
 
   edm::Handle<CrossingFrame<PCaloHit> > cf;
   iEvent.getByLabel(inputCol_,cf);
   std::auto_ptr<MixCollection<PCaloHit> > colcalo(new MixCollection<PCaloHit>(cf.product(),std::pair<int,int>(0,0) ));
 
   MixCollection<PCaloHit>::iterator it=colcalo->begin();
   MixCollection<PCaloHit>::iterator itend=colcalo->end();
   for(;it!=itend;++it)
     {
       Fill(it->id(),it->energy(),ecalsRecHits_,it.getTrigger());
       //      Fill(it->id(),it->energy(),ecalsRecHits_);
     }
 }

void EcalPreshowerRecHitsMaker::noisify ( )

private

Definition at line 126 of file EcalPreshowerRecHitsMaker.cc.

References ecalsRecHits_, escells_, ncells_, and noisifySubdet().

Referenced by loadEcalPreshowerRecHits().

 {
   if(ecalsRecHits_.size()<ncells_) 
     {
       // Not needed anymore, the noise is added when loading the PCaloHits
       // noisifySignal(ecalsRecHits_);
       noisifySubdet(ecalsRecHits_,escells_,ncells_);
     }
   else
     edm::LogWarning("CaloRecHitsProducer") << "All Preshower cells on ! " << std::endl;
 }

void EcalPreshowerRecHitsMaker::noisifySignal ( std::map< uint32_t, std::pair< float, bool > > & theMap )

private

void EcalPreshowerRecHitsMaker::noisifySubdet	(	std::map< uint32_t, std::pair< float, bool > > &	theMap,
		const std::vector< uint32_t > &	thecells,
		unsigned	ncells
	)

private

Definition at line 139 of file EcalPreshowerRecHitsMaker.cc.

References RandomEngine::flatShoot(), timingPdfMaker::mean, myGaussianTailGenerator_, RandomEngine::poissonShoot(), preshowerHotFraction_, random_, and GaussianTail::shoot().

Referenced by noisify().

 {
   // noise won't be injected in cells that contain signal
   double mean = (double)(ncells-theMap.size())*preshowerHotFraction_;
   unsigned nps = random_->poissonShoot(mean);
   
   unsigned ncell=0;
   unsigned cellindex=0;
   uint32_t cellnumber=0;
   std::map<uint32_t,std::pair<float,bool> >::const_iterator itcheck;
 
   while(ncell < nps)
     {
       cellindex = (unsigned)(random_->flatShoot()*ncells);
       cellnumber = thecells[cellindex];
       itcheck=theMap.find(cellnumber);
       if(itcheck==theMap.end()) // inject only in empty cells
     {
       std::pair <float,bool> noisehit(myGaussianTailGenerator_->shoot(),
                       false);
       theMap.insert(std::pair<uint32_t,std::pair<float,bool> >
             (cellnumber,noisehit));
       ++ncell;
     }
     }
   //  edm::LogInfo("CaloRecHitsProducer") << "CaloRecHitsProducer : added noise in "<<  ncell << " HCAL cells "  << std::endl;
 }