SeedFromConsecutiveHitsTripletOnlyCreator Class Reference

#include <SeedFromConsecutiveHitsTripletOnlyCreator.h>

Inheritance diagram for SeedFromConsecutiveHitsTripletOnlyCreator:

Public Member Functions
	SeedFromConsecutiveHitsTripletOnlyCreator (const edm::ParameterSet &cfg)
virtual	~SeedFromConsecutiveHitsTripletOnlyCreator ()
Public Member Functions inherited from SeedFromConsecutiveHitsCreator
	SeedFromConsecutiveHitsCreator (const edm::ParameterSet &cfg)
	SeedFromConsecutiveHitsCreator (const std::string &propagator="PropagatorWithMaterial", double seedMomentumForBOFF=-5.0)
virtual const TrajectorySeed *	trajectorySeed (TrajectorySeedCollection &seedCollection, const SeedingHitSet &ordered, const TrackingRegion &region, const edm::EventSetup &es)
virtual	~SeedFromConsecutiveHitsCreator ()
Public Member Functions inherited from SeedCreator
virtual	~SeedCreator ()

Protected Member Functions
virtual GlobalTrajectoryParameters	initialKinematic (const SeedingHitSet &hits, const TrackingRegion &region, const edm::EventSetup &es) const
Protected Member Functions inherited from SeedFromConsecutiveHitsCreator
virtual const TrajectorySeed *	buildSeed (TrajectorySeedCollection &seedCollection, const SeedingHitSet &hits, const FreeTrajectoryState &fts, const edm::EventSetup &es) const
virtual bool	checkHit (const TrajectoryStateOnSurface &, const TransientTrackingRecHit::ConstRecHitPointer &hit, const edm::EventSetup &es) const
virtual CurvilinearTrajectoryError	initialError (const TrackingRegion &region, float sinTheta) const
virtual TransientTrackingRecHit::RecHitPointer	refitHit (const TransientTrackingRecHit::ConstRecHitPointer &hit, const TrajectoryStateOnSurface &state) const

Additional Inherited Members
Protected Attributes inherited from SeedFromConsecutiveHitsCreator
double	theBOFFMomentum
std::string	thePropagatorLabel

Detailed Description

Definition at line 8 of file SeedFromConsecutiveHitsTripletOnlyCreator.h.

Constructor & Destructor Documentation

SeedFromConsecutiveHitsTripletOnlyCreator::SeedFromConsecutiveHitsTripletOnlyCreator ( const edm::ParameterSet &  cfg )

inline

Definition at line 11 of file SeedFromConsecutiveHitsTripletOnlyCreator.h.

                                                                         :
    SeedFromConsecutiveHitsCreator(cfg) { }

virtual SeedFromConsecutiveHitsTripletOnlyCreator::~SeedFromConsecutiveHitsTripletOnlyCreator ( )

inlinevirtual

Definition at line 14 of file SeedFromConsecutiveHitsTripletOnlyCreator.h.

{}

Member Function Documentation

GlobalTrajectoryParameters SeedFromConsecutiveHitsTripletOnlyCreator::initialKinematic ( const SeedingHitSet &  hits, const TrackingRegion &  region, const edm::EventSetup &  es  ) const

protectedvirtual

Reimplemented from SeedFromConsecutiveHitsCreator.

Definition at line 12 of file SeedFromConsecutiveHitsTripletOnlyCreator.cc.

References abs, ExpressReco_HICollisions_FallBack::e, edm::EventSetup::get(), and SeedFromConsecutiveHitsCreator::theBOFFMomentum.

{
  GlobalTrajectoryParameters kine;

  const TransientTrackingRecHit::ConstRecHitPointer& tth1 = hits[0];
  const TransientTrackingRecHit::ConstRecHitPointer& tth2 = hits[1];
  const TransientTrackingRecHit::ConstRecHitPointer& tth3 = hits[2];

  FastHelix helix(tth3->globalPosition(), tth2->globalPosition(), tth1->globalPosition(), es, tth1->globalPosition());
  kine = helix.stateAtVertex().parameters();

  edm::ESHandle<MagneticField> bfield;
  es.get<IdealMagneticFieldRecord>().get(bfield);
  bool isBOFF = ( std::abs(bfield->inTesla(GlobalPoint(0,0,0)).z()) < 1e-3 );
  if (isBOFF && (theBOFFMomentum > 0)) {
    kine = GlobalTrajectoryParameters(kine.position(),
                              kine.momentum().unit() * theBOFFMomentum,
                              kine.charge(),
                              &*bfield);
  }
  return kine;
}