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#include <SequentialVertexFitter.h>
Sequential vertex fitter, where the vertex is updated one track at the time. The fitter will iterate over the set of tracks until the transverse distance between vertices computed in the previous and the current iterations is less than the specified convergence criteria, or until the maximum number of iterations is reached. The transverse distance determines the linearization error. The default convergence criterion is 1 mm. The default maximum number of steps is 10. These parameters can be configured in .orcarc ( SequentialVertexFitter:maximumDistance and SequentialVertexFitter:maximumNumberOfIterations). After the vertex fit, the tracks can be refit with the additional constraint of the vertex position.
Definition at line 34 of file SequentialVertexFitter.h.
| typedef ReferenceCountingPointer<LinearizedTrackState<N> > SequentialVertexFitter< N >::RefCountedLinearizedTrackState |
Definition at line 40 of file SequentialVertexFitter.h.
| typedef ReferenceCountingPointer<RefittedTrackState<N> > SequentialVertexFitter< N >::RefCountedRefittedTrackState |
Definition at line 38 of file SequentialVertexFitter.h.
| typedef ReferenceCountingPointer<VertexTrack<N> > SequentialVertexFitter< N >::RefCountedVertexTrack |
Definition at line 39 of file SequentialVertexFitter.h.
| SequentialVertexFitter< N >::SequentialVertexFitter | ( | const LinearizationPointFinder & | linP, |
| const VertexUpdator< N > & | updator, | ||
| const VertexSmoother< N > & | smoother, | ||
| const AbstractLTSFactory< N > & | ltsf | ||
| ) |
Reimplemented constructors to use any kind of linearisation point finder, vertex updator and smoother. If no smoother is to be used, do not specify an instance for it.
Definition at line 23 of file SequentialVertexFitter.cc.
References SequentialVertexFitter< N >::setDefaultParameters().
: theLinP(linP.clone()), theUpdator(updator.clone()), theSmoother(smoother.clone()), theLTrackFactory ( ltsf.clone() ) { setDefaultParameters(); }
| SequentialVertexFitter< N >::SequentialVertexFitter | ( | const edm::ParameterSet & | pSet, |
| const LinearizationPointFinder & | linP, | ||
| const VertexUpdator< N > & | updator, | ||
| const VertexSmoother< N > & | smoother, | ||
| const AbstractLTSFactory< N > & | ltsf | ||
| ) |
Same as above, using a ParameterSet to set the convergence criteria
Definition at line 34 of file SequentialVertexFitter.cc.
References SequentialVertexFitter< N >::readParameters().
: thePSet(pSet), theLinP(linP.clone()), theUpdator(updator.clone()), theSmoother(smoother.clone()), theLTrackFactory ( ltsf.clone() ) { readParameters(); }
| SequentialVertexFitter< N >::SequentialVertexFitter | ( | const SequentialVertexFitter< N > & | original | ) |
Copy constructor
Definition at line 46 of file SequentialVertexFitter.cc.
References LinearizationPointFinder::clone(), SequentialVertexFitter< N >::linearizationPointFinder(), SequentialVertexFitter< N >::linearizedTrackStateFactory(), SequentialVertexFitter< N >::maxShift(), SequentialVertexFitter< N >::maxStep(), SequentialVertexFitter< N >::parameterSet(), SequentialVertexFitter< N >::vertexSmoother(), and SequentialVertexFitter< N >::vertexUpdator().
{
thePSet = original.parameterSet();
theLinP = original.linearizationPointFinder()->clone();
theUpdator = original.vertexUpdator()->clone();
theSmoother = original.vertexSmoother()->clone();
theMaxShift = original.maxShift();
theMaxStep = original.maxStep();
theLTrackFactory = original.linearizedTrackStateFactory()->clone();
}
| SequentialVertexFitter< N >::~SequentialVertexFitter | ( | ) | [virtual] |
Definition at line 60 of file SequentialVertexFitter.cc.
{
delete theLinP;
delete theUpdator;
delete theSmoother;
delete theLTrackFactory;
}
| SequentialVertexFitter< N >::SequentialVertexFitter | ( | ) | [inline, protected] |
Default constructor. Is here, as we do not want anybody to use it.
Definition at line 192 of file SequentialVertexFitter.h.
Referenced by SequentialVertexFitter< 5 >::clone().
{}
| SequentialVertexFitter* SequentialVertexFitter< N >::clone | ( | ) | const [inline, virtual] |
Fit vertex out of a VertexSeed
Implements VertexFitter< N >.
Definition at line 179 of file SequentialVertexFitter.h.
Referenced by GsfVertexFitter::GsfVertexFitter().
{
return new SequentialVertexFitter(* this);
}
| CachingVertex< N > SequentialVertexFitter< N >::fit | ( | const std::vector< RefCountedVertexTrack > & | tracks, |
| const VertexState | priorVertex, | ||
| bool | withPrior | ||
| ) | const [private] |
The methode where the vrte fit is actually done. The seed is used as the prior estimate in the vertex fit (in case its error is large, it will have little influence on the fit. The tracks will be relinearized in case further loops are needed. tracks The tracks to use in the fit. priorVertex The prior estimate of the vertex
Definition at line 258 of file SequentialVertexFitter.cc.
References VertexState::error(), error, i, CachingVertex< N >::isValid(), LogDebug, VertexState::position(), CachingVertex< N >::position(), launcher::step, testEve_cfg::tracks, transverse(), and CachingVertex< N >::vertexState().
{
std::vector<RefCountedVertexTrack> initialTracks;
GlobalPoint priorVertexPosition = priorVertex.position();
GlobalError priorVertexError = priorVertex.error();
CachingVertex<N> returnVertex(priorVertexPosition,priorVertexError,initialTracks,0);
if (withPrior) {
returnVertex = CachingVertex<N>(priorVertexPosition,priorVertexError,
priorVertexPosition,priorVertexError,initialTracks,0);
}
CachingVertex<N> initialVertex = returnVertex;
std::vector<RefCountedVertexTrack> globalVTracks = tracks;
// main loop through all the VTracks
bool validVertex = true;
int step = 0;
GlobalPoint newPosition = priorVertexPosition;
GlobalPoint previousPosition;
do {
CachingVertex<N> fVertex = initialVertex;
// make new linearized and vertex tracks for the next iteration
if(step != 0) globalVTracks = reLinearizeTracks(tracks,
returnVertex.vertexState());
// update sequentially the vertex estimate
for (typename std::vector<RefCountedVertexTrack>::const_iterator i
= globalVTracks.begin(); i != globalVTracks.end(); i++) {
fVertex = theUpdator->add(fVertex,*i);
if (!fVertex.isValid()) break;
}
validVertex = fVertex.isValid();
// check tracker bounds and NaN in position
if (validVertex && hasNan(fVertex.position())) {
LogDebug("RecoVertex/SequentialVertexFitter")
<< "Fitted position is NaN.\n";
validVertex = false;
}
if (validVertex && !insideTrackerBounds(fVertex.position())) {
LogDebug("RecoVertex/SequentialVertexFitter")
<< "Fitted position is out of tracker bounds.\n";
validVertex = false;
}
if (!validVertex) {
// reset initial vertex position to (0,0,0) and force new iteration
// if number of steps not exceeded
ROOT::Math::SMatrixIdentity id;
AlgebraicSymMatrix33 we(id);
GlobalError error(we*10000);
fVertex = CachingVertex<N>(GlobalPoint(0,0,0), error,
initialTracks, 0);
}
previousPosition = newPosition;
newPosition = fVertex.position();
returnVertex = fVertex;
globalVTracks.clear();
step++;
} while ( (step != theMaxStep) &&
(((previousPosition - newPosition).transverse() > theMaxShift) ||
(!validVertex) ) );
if (!validVertex) {
LogDebug("RecoVertex/SequentialVertexFitter")
<< "Fitted position is invalid (out of tracker bounds or has NaN). Returned vertex is invalid\n";
return CachingVertex<N>(); // return invalid vertex
}
if (step >= theMaxStep) {
LogDebug("RecoVertex/SequentialVertexFitter")
<< "The maximum number of steps has been exceeded. Returned vertex is invalid\n";
return CachingVertex<N>(); // return invalid vertex
}
// smoothing
returnVertex = theSmoother->smooth(returnVertex);
return returnVertex;
}
| bool SequentialVertexFitter< N >::hasNan | ( | const GlobalPoint & | point | ) | const [inline, private] |
| const LinearizationPointFinder* SequentialVertexFitter< N >::linearizationPointFinder | ( | void | ) | const [inline] |
Method returning the fitted vertex, from a VertexSeed. For the first loop, the position of the VertexSeed will be used as linearization point. If subsequent loops are needed, the new VertexTracks will be created with the last estimate of the vertex as linearization point. In case a non-sero error is given, the position and error of the VertexSeed will be used as prior estimate in the vertex fit.
| seed | The VertexSeed to fit. |
Definition at line 161 of file SequentialVertexFitter.h.
Referenced by SequentialVertexFitter< N >::SequentialVertexFitter().
{return theLinP;}
| const AbstractLTSFactory<N>* SequentialVertexFitter< N >::linearizedTrackStateFactory | ( | ) | const [inline] |
Definition at line 183 of file SequentialVertexFitter.h.
Referenced by SequentialVertexFitter< N >::SequentialVertexFitter().
{ return theLTrackFactory;}
| std::vector<RefCountedVertexTrack> SequentialVertexFitter< N >::linearizeTracks | ( | const std::vector< reco::TransientTrack > & | tracks, |
| const VertexState | state | ||
| ) | const [private] |
Construct a container of VertexTrack from a set of RecTracks.
| tracks | The container of RecTracks. |
| seed | The seed to use for the VertexTracks. This position will also be used as the new linearization point. |
| const float SequentialVertexFitter< N >::maxShift | ( | ) | const [inline] |
Definition at line 170 of file SequentialVertexFitter.h.
Referenced by SequentialVertexFitter< N >::SequentialVertexFitter(), and SequentialVertexFitter< 5 >::setMaximumDistance().
{return theMaxShift;}
| const int SequentialVertexFitter< N >::maxStep | ( | ) | const [inline] |
Definition at line 173 of file SequentialVertexFitter.h.
Referenced by SequentialVertexFitter< N >::SequentialVertexFitter().
{return theMaxStep;}
| const edm::ParameterSet SequentialVertexFitter< N >::parameterSet | ( | ) | const [inline] |
Definition at line 176 of file SequentialVertexFitter.h.
Referenced by SequentialVertexFitter< N >::SequentialVertexFitter().
{return thePSet;}
| void SequentialVertexFitter< N >::readParameters | ( | ) | [private] |
Reads the configurable parameters.
Definition at line 70 of file SequentialVertexFitter.cc.
Referenced by SequentialVertexFitter< N >::SequentialVertexFitter().
{
theMaxShift = thePSet.getParameter<double>("maxDistance"); //0.01
theMaxStep = thePSet.getParameter<int>("maxNbrOfIterations"); //10
}
| vector< typename SequentialVertexFitter< N >::RefCountedVertexTrack > SequentialVertexFitter< N >::reLinearizeTracks | ( | const std::vector< RefCountedVertexTrack > & | tracks, |
| const VertexState | state | ||
| ) | const [private] |
Construct new a container of VertexTrack with a new linearization point and vertex seed, from an existing set of VertexTrack, from which only the recTracks will be used.
| tracks | The original container of VertexTracks, from which the RecTracks will be extracted. |
| seed | The seed to use for the VertexTracks. This position will also be used as the new linearization point. |
Definition at line 231 of file SequentialVertexFitter.cc.
References i, VertexState::position(), and VertexState::weight().
{
GlobalPoint linP = state.position();
std::vector<RefCountedVertexTrack> finalTracks;
finalTracks.reserve(tracks.size());
for(typename std::vector<RefCountedVertexTrack>::const_iterator i = tracks.begin();
i != tracks.end(); i++) {
RefCountedLinearizedTrackState lTrData =
(**i).linearizedTrack()->stateWithNewLinearizationPoint(linP);
// RefCountedLinearizedTrackState lTrData =
// theLTrackFactory->linearizedTrackState(linP,
// (**i).linearizedTrack()->track());
RefCountedVertexTrack vTrData =
theVTrackFactory.vertexTrack(lTrData,state, (**i).weight() );
finalTracks.push_back(vTrData);
}
return finalTracks;
}
| void SequentialVertexFitter< N >::setDefaultParameters | ( | ) | [private] |
Definition at line 77 of file SequentialVertexFitter.cc.
Referenced by SequentialVertexFitter< N >::SequentialVertexFitter().
{
thePSet.addParameter<double>("maxDistance", 0.01);
thePSet.addParameter<int>("maxNbrOfIterations", 10); //10
readParameters();
}
| void SequentialVertexFitter< N >::setMaximumDistance | ( | float | maxShift | ) | [inline] |
Method to set the convergence criterion (the maximum distance between the vertex computed in the previous and the current iterations to consider the fit to have converged)
Definition at line 78 of file SequentialVertexFitter.h.
{theMaxShift = maxShift;}
| void SequentialVertexFitter< N >::setMaximumNumberOfIterations | ( | int | maxIterations | ) | [inline] |
Method to set the maximum number of iterations to perform
Definition at line 85 of file SequentialVertexFitter.h.
{theMaxStep = maxIterations;}
| CachingVertex< N > SequentialVertexFitter< N >::vertex | ( | const std::vector< RefCountedVertexTrack > & | tracks, |
| const GlobalPoint & | priorPos, | ||
| const GlobalError & | priorError | ||
| ) | const [virtual] |
Fit vertex out of a set of VertexTracks Uses the position and error for the prior estimate of the vertex. This position is not used to relinearize the tracks.
Definition at line 193 of file SequentialVertexFitter.cc.
References evf::utils::state.
{
VertexState state(priorPos, priorError);
return fit(tracks, state, true);
}
| CachingVertex< N > SequentialVertexFitter< N >::vertex | ( | const std::vector< RefCountedVertexTrack > & | tracks, |
| const reco::BeamSpot & | spot | ||
| ) | const [virtual] |
Same as above, only now also with BeamSpot!
Definition at line 102 of file SequentialVertexFitter.cc.
References evf::utils::state.
{
VertexState state(spot);
return fit(tracks, state, true );
}
| virtual CachingVertex<N> SequentialVertexFitter< N >::vertex | ( | const std::vector< reco::TransientTrack > & | tracks, |
| const GlobalPoint & | linPoint | ||
| ) | const [virtual] |
Fit vertex out of a set of RecTracks. Uses the specified linearization point.
Implements VertexFitter< N >.
| CachingVertex< N > SequentialVertexFitter< N >::vertex | ( | const std::vector< RefCountedVertexTrack > & | tracks | ) | const [virtual] |
Method returning the fitted vertex, from a container of VertexTracks. For the first loop, the LinearizedTrackState contained in the VertexTracks will be used. If subsequent loops are needed, the new VertexTracks will be created with the last estimate of the vertex as linearization point. No prior vertex position will be used in the vertex fit.
| tracks | The container of VertexTracks to fit. |
Definition at line 112 of file SequentialVertexFitter.cc.
References error, and evf::utils::state.
{
// Initial vertex state, with a very small weight matrix
GlobalPoint linP = tracks[0]->linearizedTrack()->linearizationPoint();
ROOT::Math::SMatrixIdentity id;
AlgebraicSymMatrix33 we(id);
GlobalError error(we*10000);
VertexState state(linP, error);
return fit(tracks, state, false);
}
| virtual CachingVertex<N> SequentialVertexFitter< N >::vertex | ( | const std::vector< reco::TransientTrack > & | tracks | ) | const [virtual] |
Method returning the fitted vertex, from a container of reco::TransientTracks. The linearization point will be searched with the given LP finder. No prior vertex position will be used in the vertex fit.
| tracks | The container of RecTracks to fit. |
Implements VertexFitter< N >.
Referenced by KalmanVertexFitter::vertex(), and GsfVertexFitter::vertex().
| virtual CachingVertex<N> SequentialVertexFitter< N >::vertex | ( | const std::vector< reco::TransientTrack > & | tracks, |
| const reco::BeamSpot & | beamSpot | ||
| ) | const [virtual] |
Fit vertex out of a set of TransientTracks. The specified BeamSpot will be used as priot, but NOT for the linearization. The specified LinearizationPointFinder will be used to find the linearization point.
Implements VertexFitter< N >.
| virtual CachingVertex<N> SequentialVertexFitter< N >::vertex | ( | const std::vector< reco::TransientTrack > & | tracks, |
| const GlobalPoint & | priorPos, | ||
| const GlobalError & | priorError | ||
| ) | const [virtual] |
Fit vertex out of a set of RecTracks. Uses the position as both the linearization point AND as prior estimate of the vertex position. The error is used for the weight of the prior estimate.
Implements VertexFitter< N >.
| const VertexSmoother<N>* SequentialVertexFitter< N >::vertexSmoother | ( | ) | const [inline] |
Definition at line 167 of file SequentialVertexFitter.h.
Referenced by SequentialVertexFitter< N >::SequentialVertexFitter().
{return theSmoother;}
| const VertexUpdator<N>* SequentialVertexFitter< N >::vertexUpdator | ( | ) | const [inline] |
Definition at line 164 of file SequentialVertexFitter.h.
Referenced by SequentialVertexFitter< N >::SequentialVertexFitter().
{return theUpdator;}
LinearizationPointFinder* SequentialVertexFitter< N >::theLinP [private] |
Definition at line 253 of file SequentialVertexFitter.h.
Referenced by SequentialVertexFitter< 5 >::linearizationPointFinder().
const AbstractLTSFactory<N>* SequentialVertexFitter< N >::theLTrackFactory [private] |
Definition at line 256 of file SequentialVertexFitter.h.
Referenced by SequentialVertexFitter< 5 >::linearizedTrackStateFactory().
float SequentialVertexFitter< N >::theMaxShift [private] |
Definition at line 249 of file SequentialVertexFitter.h.
Referenced by SequentialVertexFitter< 5 >::maxShift(), and SequentialVertexFitter< 5 >::setMaximumDistance().
int SequentialVertexFitter< N >::theMaxStep [private] |
Definition at line 250 of file SequentialVertexFitter.h.
Referenced by SequentialVertexFitter< 5 >::maxStep(), and SequentialVertexFitter< 5 >::setMaximumNumberOfIterations().
edm::ParameterSet SequentialVertexFitter< N >::thePSet [private] |
Definition at line 252 of file SequentialVertexFitter.h.
Referenced by SequentialVertexFitter< 5 >::parameterSet().
VertexSmoother<N>* SequentialVertexFitter< N >::theSmoother [private] |
Definition at line 255 of file SequentialVertexFitter.h.
Referenced by SequentialVertexFitter< 5 >::vertexSmoother().
VertexUpdator<N>* SequentialVertexFitter< N >::theUpdator [private] |
Definition at line 254 of file SequentialVertexFitter.h.
Referenced by SequentialVertexFitter< 5 >::vertexUpdator().
VertexTrackFactory<N> SequentialVertexFitter< N >::theVTrackFactory [private] |
Definition at line 258 of file SequentialVertexFitter.h.
1.7.3