egamma Namespace Reference

Functions
template<typename T >
uint32_t	getRandomSeedFromObj (const edm::Event &iEvent, const T &obj, size_t nrObjs, size_t objNr)
uint32_t	getRandomSeedFromSC (const edm::Event &iEvent, const reco::SuperClusterRef scRef)

Function Documentation

template<typename T >

uint32_t egamma::getRandomSeedFromObj	(	const edm::Event &	iEvent,
		const T &	obj,
		size_t	nrObjs,
		size_t	objNr
	)

Definition at line 21 of file EgammaRandomSeeds.h.

References edm::EventID::event(), edm::EventBase::id(), createfilelist::int, edm::EventID::luminosityBlock(), M_PI, SiStripPI::max, edm::EventID::run(), and SurveyInfoScenario_cff::seed.

Referenced by CalibratedPhotonProducerT< T >::setSemiDetRandomSeed(), and CalibratedElectronProducerT< T >::setSemiDetRandomSeed().

                                                                                               {
    std::seed_seq seeder = {int(iEvent.id().event()), int(iEvent.id().luminosityBlock()), int(iEvent.id().run()),
                int(nrObjs),int(std::numeric_limits<int>::max()*obj.phi()/M_PI) & 0xFFF,int(objNr)};       
    uint32_t seed = 0, tries = 10;
    do {
      seeder.generate(&seed,&seed+1); tries++;
    } while (seed == 0 && tries < 10);
    return seed ? seed : iEvent.id().event() + 10000*objNr;
  }

uint32_t egamma::getRandomSeedFromSC	(	const edm::Event &	iEvent,
		const reco::SuperClusterRef	scRef
	)

Definition at line 5 of file EgammaRandomSeeds.cc.

References edm::EventID::event(), edm::EventBase::id(), createfilelist::int, edm::Ref< C, T, F >::key(), edm::EventID::luminosityBlock(), PFRecoTauDiscriminationByIsolation_cfi::offset, edm::EventID::run(), and SurveyInfoScenario_cff::seed.

Referenced by CalibratedPhotonProducerT< T >::setSemiDetRandomSeed(), and CalibratedElectronProducerT< T >::setSemiDetRandomSeed().

{
  const int offset=0; //for future expansion
  std::seed_seq seeder = {int(iEvent.id().event()), int(iEvent.id().luminosityBlock()), int(iEvent.id().run()),
              int(scRef->seed()->seed().rawId()),int(scRef->seed()->hitsAndFractions().size()),
              offset};
  uint32_t seed = 0, tries = 10;
  do {
    seeder.generate(&seed,&seed+1); tries++;
  } while (seed == 0 && tries < 10);
  return seed ? seed : iEvent.id().event() + 10000*scRef.key();
}