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#include <SeedFromNuclearInteraction.h>
Definition at line 21 of file SeedFromNuclearInteraction.h.
typedef std::vector<ConstRecHitPointer> SeedFromNuclearInteraction::ConstRecHitContainer [private] |
Definition at line 27 of file SeedFromNuclearInteraction.h.
typedef TransientTrackingRecHit::ConstRecHitPointer SeedFromNuclearInteraction::ConstRecHitPointer [private] |
Definition at line 26 of file SeedFromNuclearInteraction.h.
typedef edm::OwnVector<TrackingRecHit> SeedFromNuclearInteraction::recHitContainer [private] |
Definition at line 25 of file SeedFromNuclearInteraction.h.
typedef TrajectoryMeasurement SeedFromNuclearInteraction::TM [private] |
Definition at line 23 of file SeedFromNuclearInteraction.h.
typedef TrajectoryStateOnSurface SeedFromNuclearInteraction::TSOS [private] |
Definition at line 24 of file SeedFromNuclearInteraction.h.
| SeedFromNuclearInteraction::SeedFromNuclearInteraction | ( | const Propagator * | prop, |
| const TrackerGeometry * | geom, | ||
| const edm::ParameterSet & | iConfig | ||
| ) |
Definition at line 13 of file SeedFromNuclearInteraction.cc.
References freeTS_, initialTSOS_, isValid_, pTraj, and updatedTSOS_.
:
ptMin(iConfig.getParameter<double>("ptMin")),
thePropagator(prop), theTrackerGeom(geom)
{
isValid_=true;
initialTSOS_ = boost::shared_ptr<TrajectoryStateOnSurface>(new TrajectoryStateOnSurface());
updatedTSOS_ = boost::shared_ptr<TrajectoryStateOnSurface>(new TrajectoryStateOnSurface());
freeTS_ = boost::shared_ptr<FreeTrajectoryState>(new FreeTrajectoryState());
pTraj = boost::shared_ptr<PTrajectoryStateOnDet>(new PTrajectoryStateOnDet());
}
| virtual SeedFromNuclearInteraction::~SeedFromNuclearInteraction | ( | ) | [inline, virtual] |
Definition at line 32 of file SeedFromNuclearInteraction.h.
{}
| bool SeedFromNuclearInteraction::construct | ( | ) | [private] |
Definition at line 125 of file SeedFromNuclearInteraction.cc.
References freeTS_, TrackingRecHit::geographicalId(), TrackerGeometry::idToDet(), TrajectoryStateOnSurface::isValid(), LogDebug, outerHitDetId(), TrajectoryStateTransform::persistentState(), Propagator::propagate(), pTraj, theHits, thePropagator, theTrackerGeom, KFUpdator::update(), and updatedTSOS_.
Referenced by setMeasurements().
{
// loop on all hits in theHits
KFUpdator theUpdator;
const TrackingRecHit* hit = 0;
LogDebug("NuclearSeedGenerator") << "Seed ** initial state " << freeTS_->cartesianError().matrix();
for ( unsigned int iHit = 0; iHit < theHits.size(); iHit++) {
hit = theHits[iHit]->hit();
TrajectoryStateOnSurface state = (iHit==0) ?
thePropagator->propagate( *freeTS_, theTrackerGeom->idToDet(hit->geographicalId())->surface())
: thePropagator->propagate( *updatedTSOS_, theTrackerGeom->idToDet(hit->geographicalId())->surface());
if (!state.isValid()) return false;
const TransientTrackingRecHit::ConstRecHitPointer& tth = theHits[iHit];
updatedTSOS_.reset( new TrajectoryStateOnSurface(theUpdator.update(state, *tth)) );
}
TrajectoryStateTransform transformer;
LogDebug("NuclearSeedGenerator") << "Seed ** updated state " << updatedTSOS_->cartesianError().matrix();
pTraj = boost::shared_ptr<PTrajectoryStateOnDet>( transformer.persistentState(*updatedTSOS_, outerHitDetId().rawId()) );
return true;
}
| PropagationDirection SeedFromNuclearInteraction::direction | ( | ) | const [inline] |
Definition at line 46 of file SeedFromNuclearInteraction.h.
References alongMomentum.
Referenced by stateWithError(), and TrajSeed().
{ return alongMomentum; }
| edm::OwnVector< TrackingRecHit > SeedFromNuclearInteraction::hits | ( | ) | const |
Definition at line 156 of file SeedFromNuclearInteraction.cc.
References edm::OwnVector< T, P >::push_back(), and theHits.
Referenced by TrajSeed().
{
recHitContainer _hits;
for( ConstRecHitContainer::const_iterator it = theHits.begin(); it!=theHits.end(); it++ ){
_hits.push_back( it->get()->hit()->clone() );
}
return _hits;
}
| const TSOS& SeedFromNuclearInteraction::initialTSOS | ( | ) | const [inline] |
Definition at line 56 of file SeedFromNuclearInteraction.h.
References initialTSOS_.
{ return *initialTSOS_; }
| bool SeedFromNuclearInteraction::isValid | ( | void | ) | const [inline] |
Definition at line 52 of file SeedFromNuclearInteraction.h.
References isValid_.
{ return isValid_; }
| ConstRecHitPointer SeedFromNuclearInteraction::outerHit | ( | ) | const [inline] |
Definition at line 64 of file SeedFromNuclearInteraction.h.
References outerHit_.
{ return outerHit_; }
| DetId SeedFromNuclearInteraction::outerHitDetId | ( | ) | const [inline] |
Definition at line 62 of file SeedFromNuclearInteraction.h.
References outerHit_.
Referenced by construct(), and outerHitPosition().
{ return outerHit_->geographicalId(); }
| GlobalPoint SeedFromNuclearInteraction::outerHitPosition | ( | ) | const [inline] |
Definition at line 58 of file SeedFromNuclearInteraction.h.
References TrackerGeometry::idToDet(), outerHit_, outerHitDetId(), GeomDet::surface(), theTrackerGeom, and Surface::toGlobal().
Referenced by stateWithError().
{
return theTrackerGeom->idToDet(outerHitDetId())->surface().toGlobal(outerHit_->localPosition());
}
| AlgebraicMatrix33 SeedFromNuclearInteraction::rotationMatrix | ( | const GlobalVector & | perp | ) | const |
Return the rotation matrix to be applied to get parameters in a framework where the z direction is along perp
Definition at line 164 of file SeedFromNuclearInteraction.cc.
References Vector3DBase< T, FrameTag >::cross(), query::result, csvLumiCalc::unit, Vector3DBase< T, FrameTag >::unit(), PV3DBase< T, PVType, FrameType >::x(), PV3DBase< T, PVType, FrameType >::y(), and PV3DBase< T, PVType, FrameType >::z().
Referenced by stateWithError().
{
AlgebraicMatrix33 result;
// z axis coincides with perp
GlobalVector zAxis = perp.unit();
// x axis has no global Z component
GlobalVector xAxis;
if ( zAxis.x() != 0 || zAxis.y() != 0) {
// precision is not an issue here, just protect against divizion by zero
xAxis = GlobalVector( -zAxis.y(), zAxis.x(), 0).unit();
}
else { // perp coincides with global Z
xAxis = GlobalVector( 1, 0, 0);
}
// y axis obtained by cross product
GlobalVector yAxis( zAxis.cross( xAxis));
result(0,0) = xAxis.x();
result(0,1) = xAxis.y();
result(0,2) = xAxis.z();
result(1,0) = yAxis.x();
result(1,1) = yAxis.y();
result(1,2) = yAxis.z();
result(2,0) = zAxis.x();
result(2,1) = zAxis.y();
result(2,2) = zAxis.z();
return result;
}
| void SeedFromNuclearInteraction::setMeasurements | ( | TangentHelix & | primHelix, |
| const TSOS & | inner_TSOS, | ||
| ConstRecHitPointer | ihit, | ||
| ConstRecHitPointer | ohit | ||
| ) |
Fill all data members from 1 TSOS and 2 rec Hits and using the circle associated to the primary track as constraint.
Definition at line 49 of file SeedFromNuclearInteraction.cc.
References construct(), freeTS_, TrackerGeometry::idToDet(), initialTSOS_, innerHit_, isValid_, outerHit_, ptMin, stateWithError(), theHits, theTrackerGeom, and GeomDet::toGlobal().
{
// delete pointer to TrackingRecHits
theHits.clear();
// get the inner and outer transient TrackingRecHits
innerHit_ = ihit;
outerHit_ = ohit;
GlobalPoint innerPos = theTrackerGeom->idToDet(innerHit_->geographicalId())->surface().toGlobal(innerHit_->localPosition());
GlobalPoint outerPos = theTrackerGeom->idToDet(outerHit_->geographicalId())->surface().toGlobal(outerHit_->localPosition());
TangentHelix helix(thePrimaryHelix, outerPos, innerPos);
theHits.push_back( innerHit_ );
theHits.push_back( outerHit_ );
initialTSOS_.reset( new TrajectoryStateOnSurface(inner_TSOS) );
// calculate the initial FreeTrajectoryState from the inner and outer TM assuming that the helix equation is already known.
freeTS_.reset(stateWithError(helix));
if(freeTS_->momentum().perp() < ptMin) { isValid_ = false; }
else {
// convert freeTS_ into a persistent TSOS on the outer surface
isValid_ = construct(); }
}
| void SeedFromNuclearInteraction::setMeasurements | ( | const TSOS & | tsosAtInteractionPoint, |
| ConstRecHitPointer | ihit, | ||
| ConstRecHitPointer | ohit | ||
| ) |
Fill all data members from 2 TM's where the first one is supposed to be at the interaction point.
Definition at line 25 of file SeedFromNuclearInteraction.cc.
References construct(), freeTS_, initialTSOS_, innerHit_, isValid_, outerHit_, ptMin, stateWithError(), and theHits.
Referenced by NuclearInteractionFinder::fillSeeds(), and NuclearInteractionFinder::improveSeeds().
{
// delete pointer to TrackingRecHits
theHits.clear();
// get the inner and outer transient TrackingRecHits
innerHit_ = ihit;
outerHit_ = ohit;
//theHits.push_back( inner_TM.recHit() ); // put temporarily - TODO: remove this line
theHits.push_back( outerHit_ );
initialTSOS_.reset( new TrajectoryStateOnSurface(inner_TSOS) );
// calculate the initial FreeTrajectoryState.
freeTS_.reset(stateWithError());
// check transverse momentum
if(freeTS_->momentum().perp() < ptMin) { isValid_ = false; }
else {
// convert freeTS_ into a persistent TSOS on the outer surface
isValid_ = construct(); }
}
| FreeTrajectoryState * SeedFromNuclearInteraction::stateWithError | ( | ) | const |
Definition at line 77 of file SeedFromNuclearInteraction.cc.
References direction(), initialTSOS_, SurfaceOrientation::inner, and outerHitPosition().
Referenced by setMeasurements().
{
// Calculation of the helix assuming that the secondary track has the same direction
// than the primary track and pass through the inner and outer hits.
GlobalVector direction = initialTSOS_->globalDirection();
GlobalPoint inner = initialTSOS_->globalPosition();
TangentHelix helix(direction, inner, outerHitPosition());
return stateWithError(helix);
}
| FreeTrajectoryState * SeedFromNuclearInteraction::stateWithError | ( | TangentHelix & | helix | ) | const |
Definition at line 88 of file SeedFromNuclearInteraction.cc.
References TangentHelix::charge(), TangentHelix::directionAtVertex(), initialTSOS_, MagneticField::inTesla(), mag(), TangentHelix::rho(), rotationMatrix(), TangentHelix::vertexError(), TangentHelix::vertexPoint(), and z.
{
// typedef TkRotation<float> Rotation;
GlobalVector dirAtVtx = helix.directionAtVertex();
const MagneticField& mag = initialTSOS_->globalParameters().magneticField();
// Get the global parameters of the trajectory
// we assume that the magnetic field at the vertex is equal to the magnetic field at the inner TM.
GlobalTrajectoryParameters gtp(helix.vertexPoint(), dirAtVtx , helix.charge(mag.inTesla(helix.vertexPoint()).z())/helix.rho(), 0, &mag);
// Error matrix in a frame where z is in the direction of the track at the vertex
AlgebraicSymMatrix66 primaryError( initialTSOS_->cartesianError().matrix() );
double p_max = initialTSOS_->globalParameters().momentum().mag();
AlgebraicMatrix33 rot = this->rotationMatrix( dirAtVtx );
AlgebraicMatrix66 globalRotation;
globalRotation.Place_at(rot,0,0);
globalRotation.Place_at(rot,3,3);
AlgebraicSymMatrix66 primaryErrorInNewFrame = ROOT::Math::Similarity(globalRotation, primaryError);
AlgebraicSymMatrix66 secondaryErrorInNewFrame = AlgebraicMatrixID();
double p_perp_max = 2; // energy max of a secondary track emited perpendicularly to the
// primary track is +/- 2 GeV
secondaryErrorInNewFrame(0,0) = primaryErrorInNewFrame(0,0)+helix.vertexError()*p_perp_max/p_max;
secondaryErrorInNewFrame(1,1) = primaryErrorInNewFrame(1,1)+helix.vertexError()*p_perp_max/p_max;
secondaryErrorInNewFrame(2,2) = helix.vertexError() * helix.vertexError();
secondaryErrorInNewFrame(3,3) = p_perp_max*p_perp_max;
secondaryErrorInNewFrame(4,4) = p_perp_max*p_perp_max;
secondaryErrorInNewFrame(5,5) = p_max*p_max;
AlgebraicSymMatrix66 secondaryError = ROOT::Math::SimilarityT(globalRotation, secondaryErrorInNewFrame);
return new FreeTrajectoryState( gtp, CartesianTrajectoryError(secondaryError) );
}
| PTrajectoryStateOnDet SeedFromNuclearInteraction::trajectoryState | ( | ) | const [inline] |
Definition at line 40 of file SeedFromNuclearInteraction.h.
References pTraj.
Referenced by TrajSeed().
{ return *pTraj; }
| TrajectorySeed SeedFromNuclearInteraction::TrajSeed | ( | ) | const [inline] |
Definition at line 50 of file SeedFromNuclearInteraction.h.
References direction(), hits(), and trajectoryState().
{ return TrajectorySeed(trajectoryState(),hits(),direction()); }
| const TSOS& SeedFromNuclearInteraction::updatedTSOS | ( | ) | const [inline] |
Definition at line 54 of file SeedFromNuclearInteraction.h.
References updatedTSOS_.
{ return *updatedTSOS_; }
boost::shared_ptr<FreeTrajectoryState> SeedFromNuclearInteraction::freeTS_ [private] |
Initial FreeTrajectoryState
Definition at line 83 of file SeedFromNuclearInteraction.h.
Referenced by construct(), SeedFromNuclearInteraction(), and setMeasurements().
boost::shared_ptr<TSOS> SeedFromNuclearInteraction::initialTSOS_ [private] |
Initial TSOS used as input
Definition at line 81 of file SeedFromNuclearInteraction.h.
Referenced by initialTSOS(), SeedFromNuclearInteraction(), setMeasurements(), and stateWithError().
Pointer to the hit of the inner TM
Definition at line 76 of file SeedFromNuclearInteraction.h.
Referenced by setMeasurements().
bool SeedFromNuclearInteraction::isValid_ [private] |
check if the seed is valid
Definition at line 71 of file SeedFromNuclearInteraction.h.
Referenced by isValid(), SeedFromNuclearInteraction(), and setMeasurements().
Pointer to the outer hit
Definition at line 77 of file SeedFromNuclearInteraction.h.
Referenced by outerHit(), outerHitDetId(), outerHitPosition(), and setMeasurements().
double SeedFromNuclearInteraction::ptMin [private] |
Minimum transverse momentum of the seed
Definition at line 90 of file SeedFromNuclearInteraction.h.
Referenced by setMeasurements().
boost::shared_ptr<PTrajectoryStateOnDet> SeedFromNuclearInteraction::pTraj [private] |
the final persistent TSOS
Definition at line 85 of file SeedFromNuclearInteraction.h.
Referenced by construct(), SeedFromNuclearInteraction(), and trajectoryState().
all the hits to be used to update the
Definition at line 73 of file SeedFromNuclearInteraction.h.
Referenced by construct(), hits(), and setMeasurements().
const Propagator* SeedFromNuclearInteraction::thePropagator [private] |
Definition at line 92 of file SeedFromNuclearInteraction.h.
Referenced by construct().
const TrackerGeometry* SeedFromNuclearInteraction::theTrackerGeom [private] |
Definition at line 93 of file SeedFromNuclearInteraction.h.
Referenced by construct(), outerHitPosition(), and setMeasurements().
boost::shared_ptr<TSOS> SeedFromNuclearInteraction::updatedTSOS_ [private] |
Final TSOS
Definition at line 79 of file SeedFromNuclearInteraction.h.
Referenced by construct(), SeedFromNuclearInteraction(), and updatedTSOS().
1.7.3