SeedFromConsecutiveHitsStraightLineCreator Class Reference

#include <SeedFromConsecutiveHitsStraightLineCreator.h>

Inheritance diagram for SeedFromConsecutiveHitsStraightLineCreator:

Public Member Functions
	SeedFromConsecutiveHitsStraightLineCreator (const edm::ParameterSet &cfg)
virtual	~SeedFromConsecutiveHitsStraightLineCreator ()
Public Member Functions inherited from SeedFromConsecutiveHitsCreator
virtual void	init (const TrackingRegion &region, const edm::EventSetup &es, const SeedComparitor *filter) final
virtual void	makeSeed (TrajectorySeedCollection &seedCollection, const SeedingHitSet &hits) final
	SeedFromConsecutiveHitsCreator (const edm::ParameterSet &cfg)
virtual	~SeedFromConsecutiveHitsCreator ()
Public Member Functions inherited from SeedCreator
virtual	~SeedCreator ()

Private Member Functions
virtual bool	initialKinematic (GlobalTrajectoryParameters &kine, const SeedingHitSet &hits) const

Additional Inherited Members
Static Public Member Functions inherited from SeedFromConsecutiveHitsCreator
static void	fillDescriptions (edm::ParameterSetDescription &desc)
static const char *	fillDescriptionsLabel ()
Protected Attributes inherited from SeedFromConsecutiveHitsCreator
edm::ESHandle< MagneticField >	bfield
TkClonerImpl	cloner
const SeedComparitor *	filter = 0
bool	forceKinematicWithRegionDirection_
bool	isBOFF = false
std::string	mfName_
float	nomField
edm::ESHandle< Propagator >	propagatorHandle
const TrackingRegion *	region = 0
double	theBOFFMomentum
double	theMinOneOverPtError
double	theOriginTransverseErrorMultiplier
std::string	thePropagatorLabel
edm::ESHandle< TrackerGeometry >	tracker
std::string	TTRHBuilder

Detailed Description

Definition at line 8 of file SeedFromConsecutiveHitsStraightLineCreator.h.

Constructor & Destructor Documentation

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

inline

Definition at line 11 of file SeedFromConsecutiveHitsStraightLineCreator.h.

                                                                          :
    SeedFromConsecutiveHitsCreator(cfg) { }

virtual SeedFromConsecutiveHitsStraightLineCreator::~SeedFromConsecutiveHitsStraightLineCreator ( )

inlinevirtual

Definition at line 14 of file SeedFromConsecutiveHitsStraightLineCreator.h.

{}

Member Function Documentation

bool SeedFromConsecutiveHitsStraightLineCreator::initialKinematic ( GlobalTrajectoryParameters &  kine, const SeedingHitSet &  hits  ) const

privatevirtual

Reimplemented from SeedFromConsecutiveHitsCreator.

Definition at line 6 of file SeedFromConsecutiveHitsStraightLineCreator.cc.

References SeedFromConsecutiveHitsCreator::bfield, TrackingRegion::origin(), PV3DBase< T, PVType, FrameType >::perp(), lumiQueryAPI::q, and SeedFromConsecutiveHitsCreator::region.

                                                                    {

  const SeedingHitSet::ConstRecHitPointer& tth1 = hits[0];
  const SeedingHitSet::ConstRecHitPointer& tth2 = hits[1];

  const GlobalPoint& vertexPos = region->origin();

  // Assume initial state is straight line passing through beam spot
  // with direction given by innermost two seed hits (with big uncertainty)
  GlobalVector initMomentum(tth2->globalPosition() - tth1->globalPosition());
  double rescale = 1000./initMomentum.perp();
  initMomentum *= rescale; // set to approximately infinite momentum
  TrackCharge q = 1; // irrelevant, since infinite momentum
  kine = GlobalTrajectoryParameters(vertexPos, initMomentum, q, &*bfield);

  return true;

}