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BarrelDetLayer Class Reference

A specialization of the DetLayer interface for barrel layers. More...

#include <TrackingTools/DetLayers/interface/BarrelDetLayer.h>

Inheritance diagram for BarrelDetLayer:

List of all members.

Public Member Functions
	BarrelDetLayer ()
virtual std::pair< bool, TrajectoryStateOnSurface >	compatible (const TrajectoryStateOnSurface &ts, const Propagator &, const MeasurementEstimator &) const
	tests the geometrical compatibility of the Det with the predicted state.
bool	contains (const Local3DPoint &p) const
virtual Location	location () const
	DetLayer interface.
virtual const BoundCylinder &	specificSurface () const
	Extension of the interface.
virtual const BoundSurface &	surface () const
	GeometricSearchDet interface.
virtual	~BarrelDetLayer ()
Protected Member Functions
virtual BoundCylinder *	computeSurface ()
virtual void	initialize ()
void	setSurface (BoundCylinder *cp)
Private Attributes
ReferenceCountingPointer < BoundCylinder >	theCylinder

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Detailed Description

A specialization of the DetLayer interface for barrel layers.

Barrel layers are cylinders with their axes parallel to the global Z axis. The methods that have a common implementation for all BarrelDetLayers are implemented in this class, but some methods are left abstract.

Date

2007/08/21 20:48:46

Revision

1.8

Definition at line 25 of file BarrelDetLayer.h.

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Constructor & Destructor Documentation

BarrelDetLayer::BarrelDetLayer

(

)

[inline]

Definition at line 28 of file BarrelDetLayer.h.

                   : 
    theCylinder(0){}

BarrelDetLayer::~BarrelDetLayer

(

)

[virtual]

Definition at line 10 of file BarrelDetLayer.cc.

{}

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Member Function Documentation

pair< bool, TrajectoryStateOnSurface > BarrelDetLayer::compatible	(	const TrajectoryStateOnSurface &	ts,
		const Propagator &	,
		const MeasurementEstimator &
	)			const [virtual]

tests the geometrical compatibility of the Det with the predicted state.

The FreeTrajectoryState argument is propagated to the Det surface using the Propagator argument. The resulting TrajectoryStateOnSurface is tested for compatibility with the surface bounds. If compatible, a std::pair< true, propagatedState> is returned. If the propagation fails, or if the state is not compatible, a std::pair< false, propagatedState> is returned.

Implements GeometricSearchDet.

Definition at line 74 of file BarrelDetLayer.cc.

References BoundSurface::bounds(), TrajectoryStateOnSurface::cartesianError(), GlobalErrorBase< T, ErrorWeightType >::czz(), TrajectoryStateOnSurface::globalDirection(), TrajectoryStateOnSurface::globalPosition(), TrajectoryStateOnSurface::hasError(), TrajectoryStateOnSurface::isValid(), Bounds::length(), HLT_VtxMuL3::nSigma, CartesianTrajectoryError::position(), GloballyPositioned< T >::position(), Propagator::propagate(), specificSurface(), funct::sqrt(), surface(), funct::tan(), theCylinder, PV3DBase< T, PVType, FrameType >::theta(), Bounds::thickness(), and PV3DBase< T, PVType, FrameType >::z().

Referenced by MuRodBarrelLayer::compatibleDets().

{
  if(theCylinder == 0)  edm::LogError("DetLayers") 
    << "ERROR: BarrelDetLayer::compatible() is used before the layer surface is initialized" ;
  // throw an exception? which one?

  TrajectoryStateOnSurface myState = prop.propagate( ts, specificSurface());
  if ( !myState.isValid()) return make_pair( false, myState);

  // take into account the thickness of the layer
  float deltaZ = surface().bounds().thickness()/2. / 
    fabs( tan( myState.globalDirection().theta()));

  // take into account the error on the predicted state
  const float nSigma = 3.;
  if (myState.hasError()) {
    deltaZ += nSigma * sqrt( myState.cartesianError().position().czz());
  }
  //
  // check z assuming symmetric bounds around position().z()
  //
  deltaZ += surface().bounds().length()/2;
  return make_pair(fabs(myState.globalPosition().z()-surface().position().z())<deltaZ,
                   myState);  
}

BoundCylinder * BarrelDetLayer::computeSurface

(

)

[protected, virtual]

Definition at line 31 of file BarrelDetLayer.cc.

References GeometricSearchDet::basicComponents(), max, min, r, rot, and z.

Referenced by initialize().

                                              {
  vector< const GeomDet*> comps = basicComponents();

  // Find extension in Z
  float theRmin = comps.front()->position().perp();   
  float theRmax = theRmin;
  float theZmin = comps.front()->position().z(); 
  float theZmax = theZmin;
  for ( vector< const GeomDet*>::const_iterator deti = comps.begin(); 
        deti != comps.end(); deti++) {
    vector<GlobalPoint> corners = 
      BoundingBox().corners( dynamic_cast<const BoundPlane&>((*deti)->surface()));
    for (vector<GlobalPoint>::const_iterator ic = corners.begin();
         ic != corners.end(); ic++) {
      float r = ic->perp();
      float z = ic->z();
      theRmin = min( theRmin, r);
      theRmax = max( theRmax, r);
      theZmin = min( theZmin, z);
      theZmax = max( theZmax, z);
    }
    // in addition to the corners we have to check the middle of the 
    // det +/- thickness/2
    // , since the min  radius for some barrel dets is reached there
    float rdet = (**deti).position().perp();
    float thick = (**deti).surface().bounds().thickness();
    theRmin = min( theRmin, rdet-thick/2.F);
    theRmax = max( theRmax, rdet+thick/2.F);
  }
  
  // By default the barrel layers are positioned at the center of the 
  // global frame, and the axes of their local frame coincide with 
  // those of the global grame (z along the cylinder axis)
  PositionType pos(0.,0.,0.);
  RotationType rot;

  return new BoundCylinder( pos, rot, 
                            SimpleCylinderBounds( theRmin, theRmax, 
                                                  theZmin, theZmax));
}  

bool BarrelDetLayer::contains

(

const Local3DPoint &

p

)

const

Definition at line 19 of file BarrelDetLayer.cc.

References BoundSurface::bounds(), Bounds::inside(), and surface().

                                                         {
  return surface().bounds().inside(p);
}

void BarrelDetLayer::initialize

(

void

)

[protected, virtual]

Definition at line 23 of file BarrelDetLayer.cc.

References computeSurface(), and setSurface().

{
  setSurface( computeSurface());
}

virtual Location BarrelDetLayer::location

(

)

const [inline, virtual]

DetLayer interface.

Implements DetLayer.

Definition at line 41 of file BarrelDetLayer.h.

References GeomDetEnumerators::barrel.

{return GeomDetEnumerators::barrel;}

void BarrelDetLayer::setSurface

(

BoundCylinder *

cp

)

[protected]

Definition at line 15 of file BarrelDetLayer.cc.

References theCylinder.

Referenced by initialize().

                                                  { 
  theCylinder = cp;
}

virtual const BoundCylinder& BarrelDetLayer::specificSurface

(

)

const [inline, virtual]

Extension of the interface.

Definition at line 45 of file BarrelDetLayer.h.

References theCylinder.

Referenced by MuonNavigationSchool::addBarrelLayer(), MuonTkNavigationSchool::addBarrelLayer(), GroupedCkfTrajectoryBuilder::advanceOneLayer(), CkfDebugger::analyseRecHitNotFound(), DirectTrackerNavigation::checkCompatible(), DirectMuonNavigation::checkCompatible(), compatible(), MuRodBarrelLayer::compatibleDets(), PixelHitMatcher::compatibleHits(), MultipleScatteringGeometry::detLayers(), RectangularEtaPhiTrackingRegion::estimator(), InOutConversionSeedFinder::fillClusterSeeds(), HitPairGeneratorFromLayerPair::hitPairs(), InnerDeltaPhi::initBarrelLayer(), ThirdHitRZPrediction::initLayer(), ThirdHitPrediction::initLayer(), TkLayerLess::insideOutLess(), TkLayerLess::insideOutLessSigned(), SimpleNavigationSchool::linkNextForwardLayer(), HICSimpleNavigationSchool::linkNextForwardLayer(), OutInConversionSeedFinder::makeEstimator(), MSLayer::MSLayer(), ExtractBarrelDetLayerR::operator()(), MuonDetLayerComp::operator()(), ConversionSeedFinder::printLayer(), and SimpleNavigableLayer::wellInside().

{ return *theCylinder;}

virtual const BoundSurface& BarrelDetLayer::surface

(

)

const [inline, virtual]

GeometricSearchDet interface.

Implements GeometricSearchDet.

Definition at line 34 of file BarrelDetLayer.h.

References theCylinder.

Referenced by TkLayerLess::barrelForwardLess(), compatible(), contains(), RectangularEtaPhiTrackingRegion::estimator(), HitPairGeneratorFromLayerPair::hitPairs(), ThirdHitRZPrediction::initLayer(), ThirdHitPrediction::initLayer(), SimpleNavigationSchool::linkNextForwardLayer(), HICSimpleNavigationSchool::linkNextForwardLayer(), and MSLayer::MSLayer().

{ return *theCylinder;}

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Member Data Documentation

ReferenceCountingPointer<BoundCylinder> BarrelDetLayer::theCylinder [private]

Definition at line 61 of file BarrelDetLayer.h.

Referenced by compatible(), setSurface(), specificSurface(), and surface().

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The documentation for this class was generated from the following files:

• TrackingTools/DetLayers/interface/BarrelDetLayer.h
• TrackingTools/DetLayers/src/BarrelDetLayer.cc

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