GlobalTrackingRegion Class Reference

#include <GlobalTrackingRegion.h>

Inheritance diagram for GlobalTrackingRegion:

Public Member Functions
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 override
GlobalTrackingRegion *	clone () const override
	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::EventSetup &es, const SeedingLayerSetsHits::SeedingLayer &layer) const override
	get hits from layer compatible with region constraints More...
std::string	name () const override
std::string	print () const override
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
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.

References checkRZ(), runTauDisplay::dr, PVValHelper::dz, and hits().

    : 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

overridevirtual

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

Implements TrackingRegion.

Definition at line 36 of file GlobalTrackingRegion.cc.

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

Referenced by GlobalTrackingRegion().

{

  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)));
}

GlobalTrackingRegion* GlobalTrackingRegion::clone ( void  ) const

inlineoverridevirtual

Implements TrackingRegion.

Definition at line 47 of file GlobalTrackingRegion.h.

References GlobalTrackingRegion().

                                               { 
    return new GlobalTrackingRegion(*this);
  }

TrackingRegion::Hits GlobalTrackingRegion::hits ( 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().

Referenced by GlobalTrackingRegion(), and SimpleCosmicBONSeeder::triplets().

                                                           {
  return layer.hits();
}

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

inlineoverridevirtual

Reimplemented from TrackingRegion.

Definition at line 51 of file GlobalTrackingRegion.h.

References print(), and AlCaHLTBitMon_QueryRunRegistry::string.

Referenced by config.CFG::__str__(), and validation.Sample::digest().

{ return "GlobalTrackingRegion"; }

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

overridevirtual

Reimplemented from TrackingRegion.

Definition at line 21 of file GlobalTrackingRegion.cc.

References TrackingRegion::print(), and str.

Referenced by name().

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

Member Data Documentation

bool GlobalTrackingRegion::thePrecise =false

private

Definition at line 55 of file GlobalTrackingRegion.h.

bool GlobalTrackingRegion::theUseMS =false

private

Definition at line 56 of file GlobalTrackingRegion.h.