GlobalTrackingRegion Class Reference

#include <GlobalTrackingRegion.h>

Inheritance diagram for GlobalTrackingRegion:

Public Member Functions
virtual HitRZCompatibility *	checkRZ (const DetLayer *layer, const Hit &outerHit, const edm::EventSetup &iSetup, const DetLayer *outerlayer=0, float lr=0, float gz=0, float dr=0, float dz=0) const
virtual GlobalTrackingRegion *	clone () const
	GlobalTrackingRegion (float ptMin, const GlobalPoint &origin, float originRadius, float originHalfLength, bool precise=false, bool useMS=false)
	GlobalTrackingRegion (float ptMin=1., float originRadius=0.2, float originHalfLength=22.7, float originZPos=0., bool precise=false)
TrackingRegion::Hits	hits (const edm::Event &ev, const edm::EventSetup &es, const SeedingLayerSetsHits::SeedingLayer &layer) const override
	get hits from layer compatible with region constraints More...
virtual std::string	name () const
virtual std::string	print () const
Public Member Functions inherited from TrackingRegion
GlobalVector const &	direction () const
	the direction around which region is constructed More...
Range	invPtRange () const
	inverse pt range More...
GlobalPoint const &	origin () const
float	originRBound () const
	bounds the particle vertex in the transverse plane More...
float	originZBound () const
	bounds the particle vertex in the longitudinal plane More...
float	phiDirection () const
float	ptMin () const
	minimal pt of interest More...
TrackingRegion *	restrictedRegion (const GlobalPoint &originPos, const float &originRBound, const float &originZBound) const
	clone region with new vertex position More...
	TrackingRegion (const GlobalVector &direction, const GlobalPoint &originPos, const Range &invPtRange, const float &originRBound, const float &originZBound)
GlobalVector const &	unitDirection () const
virtual	~TrackingRegion ()

Private Attributes
bool	thePrecise =false
bool	theUseMS =false

Additional Inherited Members
Public Types inherited from TrackingRegion
using	ctfHits = ctfseeding::SeedingLayer::Hits
typedef SeedingLayerSetsHits::ConstRecHitPointer	Hit
typedef SeedingLayerSetsHits::Hits	Hits
typedef PixelRecoRange< float >	Range

Detailed Description

An implementation of the TrackingRegion where the region of interest is global, ie there are no constraints on the allowed direction of particles of interest

Definition at line 13 of file GlobalTrackingRegion.h.

Constructor & Destructor Documentation

GlobalTrackingRegion::GlobalTrackingRegion ( float  ptMin, const GlobalPoint &  origin, float  originRadius, float  originHalfLength, bool  precise = false, bool  useMS = false  )

inline

Construct from minimal track P_t, and origin size and position. The origin region is a cylinder of radius originRadius, half length originHalfLength, positioned at "origin". This class DOES provide the possibility to displace the origin in the transverse plane.

Definition at line 22 of file GlobalTrackingRegion.h.

Referenced by clone().

    :  TrackingRegionBase(GlobalVector( 0, 0, 0), origin,
      Range( -1/ptMin, 1/ptMin), originRadius, originHalfLength),
      thePrecise(precise), theUseMS(useMS) { }

GlobalTrackingRegion::GlobalTrackingRegion ( float  ptMin = 1., float  originRadius = 0.2, float  originHalfLength = 22.7, float  originZPos = 0., bool  precise = false  )

inline

Definition at line 29 of file GlobalTrackingRegion.h.

    : TrackingRegionBase(GlobalVector( 0, 0, 0), GlobalPoint( 0, 0, originZPos),
      Range( -1/ptMin, 1/ptMin), originRadius, originHalfLength),
      thePrecise(precise) { }

Member Function Documentation

HitRZCompatibility * GlobalTrackingRegion::checkRZ ( const DetLayer *  layer, const Hit &  outerHit, const edm::EventSetup &  iSetup, const DetLayer *  outerlayer = 0, float  lr = 0, float  gz = 0, float  dr = 0, float  dz = 0  ) const

virtual

utility to check eta/theta hit compatibility with region constraints and outer hit constraint

Implements TrackingRegion.

Definition at line 37 of file GlobalTrackingRegion.cc.

References constexpr, corr, PixelRecoLineRZ::cotLine(), SimpleLineRZ::cotLine(), GeomDetEnumerators::isBarrel(), DetLayer::isBarrel(), fastTrackerRecHitType::isPixel(), nSigmaPhi, GeomDetEnumerators::PixelBarrel, GeomDetEnumerators::PixelEndcap, PtMinSelector_cfg::ptMin, DetLayer::seqNum(), funct::sqr(), mathSSE::sqrt(), DetLayer::subDetector(), unlikely, vtxMean(), PV3DBase< T, PVType, FrameType >::x(), PV3DBase< T, PVType, FrameType >::y(), and PV3DBase< T, PVType, FrameType >::z().

{

  bool isBarrel = layer->isBarrel();
  bool isPixel = (layer->subDetector() == PixelBarrel || layer->subDetector() == PixelEndcap);
  
  if unlikely(!outerlayer) {
        GlobalPoint ohit =  outerHit->globalPosition();
        lr = std::sqrt( sqr(ohit.x()-origin().x())+sqr(ohit.y()-origin().y()) );
    gz = ohit.z();
    dr = outerHit->errorGlobalR();
    dz = outerHit->errorGlobalZ();
    }
  

  PixelRecoPointRZ outerred(lr, gz);


  PixelRecoPointRZ vtxR = (gz > origin().z()+originZBound()) ?
      PixelRecoPointRZ(-originRBound(), origin().z()+originZBound())
    : PixelRecoPointRZ( originRBound(), origin().z()+originZBound());
  PixelRecoPointRZ vtxL = (gz< origin().z()-originZBound()) ?
      PixelRecoPointRZ(-originRBound(), origin().z()-originZBound())
    : PixelRecoPointRZ( originRBound(), origin().z()-originZBound()); 

  if unlikely((!thePrecise) &&(isPixel )) {
    auto VcotMin = PixelRecoLineRZ( vtxR, outerred).cotLine();
    auto VcotMax = PixelRecoLineRZ( vtxL, outerred).cotLine();
    return new HitEtaCheck(isBarrel, outerred, VcotMax, VcotMin);
  }
  
  constexpr float nSigmaPhi = 3.;
 
  dr *= nSigmaPhi;
  dz *= nSigmaPhi;

  PixelRecoPointRZ  outerL, outerR;
  if (isBarrel) {
    outerL = PixelRecoPointRZ(lr, gz-dz);
    outerR = PixelRecoPointRZ(lr, gz+dz);
  } 
  else if (gz > 0) {
    outerL = PixelRecoPointRZ(lr+dr, gz);
    outerR = PixelRecoPointRZ(lr-dr, gz);
  } 
  else {
    outerL = PixelRecoPointRZ(lr-dr, gz);
    outerR = PixelRecoPointRZ(lr+dr, gz);
  }
  
  auto corr = isBarrel ? dz : dr;

  SimpleLineRZ leftLine( vtxL, outerL);
  SimpleLineRZ rightLine( vtxR, outerR);
  HitRZConstraint rzConstraint(leftLine, rightLine);


  if unlikely(theUseMS) {
    MultipleScatteringParametrisation iSigma(layer,iSetup);
    PixelRecoPointRZ vtxMean(0.,origin().z());

    float innerScatt = 3.f * ( outerlayer ?
     iSigma( ptMin(), vtxMean, outerred, outerlayer->seqNum())
    :  iSigma( ptMin(), vtxMean, outerred) ) ;
  
    float cotTheta = SimpleLineRZ(vtxMean,outerred).cotLine();

    if (isBarrel) {
      float sinTheta = 1/std::sqrt(1+sqr(cotTheta));
      corr = innerScatt/sinTheta + dz;
     } else {
      float cosTheta = 1/std::sqrt(1+sqr(1/cotTheta));
      corr = innerScatt/cosTheta + dr;
    }
  }

  return isBarrel ? (HitRZCompatibility*)(new HitZCheck(rzConstraint, HitZCheck::Margin(corr,corr))) :
                    (HitRZCompatibility*)(new HitRCheck(rzConstraint, HitRCheck::Margin(corr,corr)));
}

virtual GlobalTrackingRegion* GlobalTrackingRegion::clone ( void  ) const

inlinevirtual

Implements TrackingRegion.

Definition at line 48 of file GlobalTrackingRegion.h.

References GlobalTrackingRegion().

                                              { 
    return new GlobalTrackingRegion(*this);
  }

TrackingRegion::Hits GlobalTrackingRegion::hits ( const edm::Event &  ev, const edm::EventSetup &  es, const SeedingLayerSetsHits::SeedingLayer &  layer  ) const

overridevirtual

get hits from layer compatible with region constraints

Implements TrackingRegion.

Definition at line 27 of file GlobalTrackingRegion.cc.

References SeedingLayerSetsHits::SeedingLayer::hits().

                                                           {
  return layer.hits();
}

virtual std::string GlobalTrackingRegion::name ( void  ) const

inlinevirtual

Reimplemented from TrackingRegion.

Definition at line 52 of file GlobalTrackingRegion.h.

{ return "GlobalTrackingRegion"; }

std::string GlobalTrackingRegion::print ( void  ) const

virtual

Reimplemented from TrackingRegion.

Definition at line 21 of file GlobalTrackingRegion.cc.

References TrackingRegion::print().

                                            {
  std::ostringstream str;
  str << TrackingRegionBase::print() << "precise: "<<thePrecise;
  return str.str(); 
}

Member Data Documentation

bool GlobalTrackingRegion::thePrecise =false

private

Definition at line 56 of file GlobalTrackingRegion.h.

bool GlobalTrackingRegion::theUseMS =false

private

Definition at line 57 of file GlobalTrackingRegion.h.