The TrackFitterBase is a virtual class from which the actual track fitters are derived. More...
#include <TrackFitterBase.h>
Classes | |
| struct | FitterTypes |
| Defines constants to determine which fitter type was used to perform the fit and calculate the residuals. More... | |
Public Member Functions | |
| TrackFitterBase () | |
| The Constructor. More... | |
| virtual std::string | getRevision () const |
| Get the revision of the actual fitter implementation. More... | |
| virtual unsigned char | getFitterType () const =0 |
| Information what fitter implementation this is. | |
| virtual IMPL::TrackImpl * | fitTrack (EVENT::Track const *seedTrack) const =0 |
| The function which does the actual fitting. More... | |
| virtual EVENT::DoubleVec | calculateResiduals (EVENT::Track const *testTrack, unsigned int testHitNumber, EVENT::Track const *referenceTrack=NULL) const |
Return the distance of the hit testHitNumber of the testTrack to the point of closest approach on the referenceTrack wrt. the hit. More... | |
| virtual EVENT::DoubleVec | calculateResiduals (EVENT::TrackerHit const *testHit, EVENT::Track const *trackWithoutTestHit) const |
| Return the distance of the given hit to the test track where this hit has been removed. More... | |
| void | setD0Start (double d0) |
| Set a d0 start value for the fit. More... | |
| void | setPhiStart (double phi) |
| Set a phi start value for the fit. More... | |
| void | setOmegaStart (double omega) |
| Set a omega start value for the fit. More... | |
| void | setTanLambdaStart (double tanLambda) |
| Set a tanLambda start value for the fit. More... | |
| void | setZ0Start (double z0) |
| Set a z0 start value for the fit. More... | |
| void | setNoZFitFlag (bool noZFit=true) |
| Switch to turn off the fitting in z. More... | |
| bool | getNoZFitFlag () const |
| Get the noZFit flag. | |
| void | fixD0 (bool fix=true) |
| Fix or release d0. | |
| void | fixPhi (bool fix=true) |
| Fix or release phi. | |
| void | fixOmega (bool fix=true) |
| Fix or release omega. | |
| void | fixTanLambda (bool fix=true) |
| Fix or release tanLambda. | |
| void | fixZ0 (bool fix=true) |
| Fix or release z0. | |
Static Public Member Functions | |
| static void | setTrackFitterType (unsigned char type, IMPL::TrackImpl *track) |
| Convenience function to set bits 16-23 to be the track type. | |
| static unsigned char | getFitterTypeFromTrack (int trackTypeWord) |
| Convenicene function to get the tracker type out of the trackType word. | |
Static Public Attributes | |
| static const unsigned char | FITFAILEDBIT = 30 |
| Bit 30 in the TrackType word is fit failed. | |
Protected Member Functions | |
| double | distanceOnCircle (double phi1, double phi2) const |
| Calculate the angular distance on a circle. More... | |
Protected Attributes | |
| double | _d0Start |
| The start value for the fit and a flag whether to apply d0Start or the value from the seed track. | |
| bool | _useD0Start |
| double | _phiStart |
| The start value for the fit and a flag whether to apply phiStart or the value from the seed track. | |
| bool | _usePhiStart |
| double | _omegaStart |
| The start value for the fit and a flag whether to apply omegaStart or the value from the seed track. | |
| bool | _useOmegaStart |
| double | _tanLambdaStart |
| The start value for the fit and a flag whether to apply tanLambdaStart or the value from the seed track. | |
| bool | _useTanLambdaStart |
| double | _z0Start |
| The start value for the fit and a flag whether to apply z0Start or the value from the seed track. | |
| bool | _useZ0Start |
| bool | _noZFit |
| flag whether to perform a 2D or a 3D fit | |
| bool | _fixD0 |
| flags whether to fix a fit parameter | |
| bool | _fixPhi |
| bool | _fixOmega |
| bool | _fixTanLambda |
| bool | _fixZ0 |
Detailed Description
The TrackFitterBase is a virtual class from which the actual track fitters are derived.
It provides a common interface which is accessed by the track fitter processors and analysis processors.
Most members are purely virtual. They have to be overloaded/implemented in the derived classes.
To calculate something like a single point resolution it is required that these "points" are accessed via the EVENT::TrackerHit as an interface. Some methods like the global likelihood method don't use the xy-information from hits but refit a x-position from the charge on the pads using the given track fit . This requires a calculateResiduals method individually for each fitting method. To have a common interface for all methods the TrackerHit is used, through which the more low level information like pulses can be accessed.
The calculateResiduals method is not purely virtual. It is implemented for the generic case which calculates the distance to the point of closest approach (pca) in the readout plane and the z-distance to the pca in the s-z plane.
Constructor & Destructor Documentation
| marlintpc::TrackFitterBase::TrackFitterBase | ( | ) |
The Constructor.
The fit start values are initialised here and the flags whether to use the are set to false (start values are taken from seed track).
Member Function Documentation
|
virtual |
Return the distance of the hit testHitNumber of the testTrack to the point of closest approach on the referenceTrack wrt. the hit.
If no referenceTrack is given the distance to the testTrack is returned.
Throws EVENT::DataNotAvailableException in case there is no hit number "testHitNumber" on testHit.
Calls calculateResidual(EVENT::TrackerHit *testHit, EVENT::Track *trackWithoutTestHit) in this implementation.
Reimplemented in marlintpc::TrackFitterSimpleChiSquarePads.
Referenced by marlintpc::TimePixHoughTransformNormalProcessor::AddHits(), marlintpc::TrackFitterSimpleMinimizerProcessor::calculateMeanAndRMS(), marlintpc::BiasedResidualsProcessor::processEvent(), marlintpc::GeometricMeanResidualsTupleProcessor::processEvent(), marlintpc::PadResponseProcessor::processEvent(), and marlintpc::TrackFitterSimpleMinimizerProcessor::processEvent().
|
virtual |
Return the distance of the given hit to the test track where this hit has been removed.
The residual is calculated as the distance to the point of closest approach on the referenceTrack wrt. the hit.
Reimplemented in marlintpc::TrackFitterSimpleChiSquarePads.
|
protected |
Calculate the angular distance on a circle.
The maximum can be 
.
Referenced by marlintpc::TrackFitterSimpleChiSquarePads::calculateResiduals().
|
pure virtual |
The function which does the actual fitting.
The returned TrackImpl is created from heap. Be careful to either add it to an event/collection or to delete it otherwise to avoid memory leaks.
Implemented in marlintpc::TrackFitterKalman, marlintpc::TrackFitterSimpleChiSquarePads, marlintpc::TrackFitterSimpleMinimizer, marlintpc::TrackFitterLinearRegression, marlintpc::TrackFitterSimpleHelix, and marlintpc::TrackFitterSimpleChiSquare.
Referenced by marlintpc::GeometricMeanResidualsTupleProcessor::processEvent(), marlintpc::TrackFitterSimpleMinimizerProcessor::processEvent(), and marlintpc::TrackFitterSimpleChiSquareProcessor::processEvent().
|
virtual |
Get the revision of the actual fitter implementation.
This is needed for revision logging. Implementation should look like:
return std::string( "$Rev$" );
In case you don't reimplement the calculateResidulas methods you should also state the revision of this base class:
return std::string( "$Rev$ ; TrackFitterBase ") + TrackFitterBase::getRevision();
Don't forget to switch on the 'svn Rev' property for this file:
svn propset svn:keywords Rev TrackFitterImpl.cc
Reimplemented in marlintpc::TrackFitterKalman, marlintpc::TrackFitterSimpleChiSquarePads, marlintpc::TrackFitterSimpleMinimizer, marlintpc::TrackFitterLinearRegression, marlintpc::TrackFitterSimpleHelix, and marlintpc::TrackFitterSimpleChiSquare.
Referenced by marlintpc::TrackFitterSimpleChiSquare::getRevision().
| void marlintpc::TrackFitterBase::setD0Start | ( | double | d0 | ) |
Set a d0 start value for the fit.
This overwrites the value from the seed track.
References _d0Start.
Referenced by marlintpc::TrackFitterSimpleChiSquareProcessor::processEvent().
| void marlintpc::TrackFitterBase::setNoZFitFlag | ( | bool | noZFit = true | ) |
Switch to turn off the fitting in z.
Fit is only performed in x-y / r-phi plane. As default noZFit is false, the fit is performed in three dimensions.
References _noZFit.
Referenced by marlintpc::TrackFitterSimpleChiSquareProcessor::processEvent().
| void marlintpc::TrackFitterBase::setOmegaStart | ( | double | omega | ) |
Set a omega start value for the fit.
This overwrites the value from the seed track.
References _omegaStart.
Referenced by marlintpc::TrackFitterSimpleChiSquareProcessor::processEvent().
| void marlintpc::TrackFitterBase::setPhiStart | ( | double | phi | ) |
Set a phi start value for the fit.
This overwrites the value from the seed track.
References _phiStart.
Referenced by marlintpc::TrackFitterSimpleChiSquareProcessor::processEvent().
| void marlintpc::TrackFitterBase::setTanLambdaStart | ( | double | tanLambda | ) |
Set a tanLambda start value for the fit.
This overwrites the value from the seed track.
References _tanLambdaStart.
Referenced by marlintpc::TrackFitterSimpleChiSquareProcessor::processEvent().
| void marlintpc::TrackFitterBase::setZ0Start | ( | double | z0 | ) |
Set a z0 start value for the fit.
This overwrites the value from the seed track.
References _z0Start.
Referenced by marlintpc::TrackFitterSimpleChiSquareProcessor::processEvent().
The documentation for this class was generated from the following files:
- TrackFitterBase.h
- TrackFitterBase.cc
