#include <RPCSimSimple.h>

Inheritance diagram for RPCSimSimple:

Public Member Functions
	RPCSimSimple (const edm::ParameterSet &config)
void	setRandomEngine (CLHEP::HepRandomEngine &eng)
void	simulate (const RPCRoll *roll, const edm::PSimHitContainer &rpcHits)
void	simulateNoise (const RPCRoll *)
	~RPCSimSimple ()
Private Member Functions
void	init ()
Private Attributes
RPCSynchronizer *	_rpcSync
CLHEP::RandFlat *	flatDistribution1
CLHEP::RandFlat *	flatDistribution2
double	gate
int	N_hits
int	nbxing
CLHEP::RandPoissonQ *	poissonDistribution
double	rate

Detailed Description

Class for the RPC strip response simulation based on a very simple model

Author:: Marcello Maggi -- INFN Bari

Definition at line 21 of file RPCSimSimple.h.

Constructor & Destructor Documentation

RPCSimSimple::RPCSimSimple ( const edm::ParameterSet & config )

Definition at line 28 of file RPCSimSimple.cc.

References _rpcSync, gate, edm::ParameterSet::getParameter(), nbxing, and rate.

                                                        : RPCSim(config){

  rate=config.getParameter<double>("Rate");
  nbxing=config.getParameter<int>("Nbxing");
  gate=config.getParameter<double>("Gate");

  _rpcSync = new RPCSynchronizer(config);
}

RPCSimSimple::~RPCSimSimple ( )

Definition at line 45 of file RPCSimSimple.cc.

References _rpcSync, flatDistribution1, flatDistribution2, and poissonDistribution.

                           {
  delete flatDistribution1;
  delete flatDistribution2;
  delete poissonDistribution;
  delete _rpcSync;
}

Member Function Documentation

void RPCSimSimple::init ( void ) [inline, private, virtual]

Implements RPCSim.

Definition at line 35 of file RPCSimSimple.h.

{};

void RPCSimSimple::setRandomEngine ( CLHEP::HepRandomEngine & eng ) [virtual]

Implements RPCSim.

Definition at line 37 of file RPCSimSimple.cc.

References _rpcSync, flatDistribution1, flatDistribution2, poissonDistribution, and RPCSynchronizer::setRandomEngine().

                                                           {
  flatDistribution1 = new CLHEP::RandFlat(eng);
  flatDistribution2 = new CLHEP::RandFlat(eng);
  poissonDistribution = new CLHEP::RandPoissonQ(eng);
  _rpcSync->setRandomEngine(eng);
}

void RPCSimSimple::simulate	(	const RPCRoll *	roll,
		const edm::PSimHitContainer &	rpcHits
	)		`[virtual]`

Implements RPCSim.

Definition at line 54 of file RPCSimSimple.cc.

References _rpcSync, edm::DetSet< T >::clear(), RPCSim::getRPCSimSetUp(), RPCSynchronizer::getSimHitBx(), RPCRoll::id(), DetId::rawId(), RPCSynchronizer::setRPCSimSetUp(), RPCRoll::specs(), RPCSim::strips, RPCSim::theDetectorHitMap, RPCSim::theRpcDigiSimLinks, and RPCRollSpecs::topology().

{
  _rpcSync->setRPCSimSetUp(getRPCSimSetUp());
  theRpcDigiSimLinks.clear();
  theDetectorHitMap.clear();
  theRpcDigiSimLinks = RPCDigiSimLinks(roll->id().rawId());

  const Topology& topology=roll->specs()->topology();
  for (edm::PSimHitContainer::const_iterator _hit = rpcHits.begin();
       _hit != rpcHits.end(); ++_hit){

 
    // Here I hould check if the RPC are up side down;
    const LocalPoint& entr=_hit->entryPoint();
    int time_hit = _rpcSync->getSimHitBx(&(*_hit));
    //    const LocalPoint& exit=_hit->exitPoint();
        
    std::pair<int, int> digi(topology.channel(entr)+1,
                             time_hit);

    theDetectorHitMap.insert(DetectorHitMap::value_type(digi,&(*_hit)));
    strips.insert(digi);
  }
}

void RPCSimSimple::simulateNoise ( const RPCRoll * roll ) [virtual]

Implements RPCSim.

Definition at line 81 of file RPCSimSimple.cc.

References compareJSON::const, flatDistribution1, flatDistribution2, gate, i, RPCRoll::id(), TrapezoidalStripTopology::localPosition(), RectangularStripTopology::localPosition(), N_hits, nbxing, RPCRoll::nstrips(), poissonDistribution, rate, RPCDetId::region(), strip(), RectangularStripTopology::stripLength(), TrapezoidalStripTopology::stripLength(), RPCSim::strips, RPCRoll::topology(), and ExpressReco_HICollisions_FallBack::x.

{

  RPCDetId rpcId = roll->id();
  int nstrips = roll->nstrips();
  double area = 0.0;
  
  if ( rpcId.region() == 0 )
    {
      const RectangularStripTopology* top_ = dynamic_cast<const
        RectangularStripTopology*>(&(roll->topology()));
      float xmin = (top_->localPosition(0.)).x();
      float xmax = (top_->localPosition((float)roll->nstrips())).x();
      float striplength = (top_->stripLength());
      area = striplength*(xmax-xmin);
    }
  else
    {
      const TrapezoidalStripTopology* top_=dynamic_cast<const TrapezoidalStripTopology*>(&(roll->topology()));
      float xmin = (top_->localPosition(0.)).x();
      float xmax = (top_->localPosition((float)roll->nstrips())).x();
      float striplength = (top_->stripLength());
      area = striplength*(xmax-xmin);
    }
  
  double ave = rate*nbxing*gate*area*1.0e-9;

  N_hits = poissonDistribution->fire(ave);

  for (int i = 0; i < N_hits; i++ ){
    int strip = static_cast<int>(flatDistribution1->fire(1, nstrips));
    int time_hit;
    time_hit = (static_cast<int>(flatDistribution2->fire((nbxing*gate)/gate))) - nbxing/2;
    std::pair<int, int> digi(strip,time_hit);
    strips.insert(digi);
  }
}