SimpleSegmentTripleFilter Class Reference

Filter for the constuction of segment triples based on simple criterions. More...

#include <SimpleSegmentTripleFilter.h>

Inheritance diagram for SimpleSegmentTripleFilter:

Collaboration diagram for SimpleSegmentTripleFilter:

Public Types
using	Object = CDCSegmentTriple
	Type of the object to be analysed.
using	Interface = Filter< CDCSegmentTriple >
	Mark this class as the basic interface.

Public Member Functions
Weight	operator() (const CDCSegmentTriple &segmentTriple) final
	Checks if a triple of axial, stereo and axial segments is a good combination to be stored. More...
virtual void	exposeParameters (ModuleParamList *moduleParamList, const std::string &prefix)
	Expose the set of parameters of the filter to the module parameter list. More...
virtual bool	needsTruthInformation ()
	Indicates if the filter requires Monte Carlo information.
Weight	operator() (const Object *obj)
	Function to evaluate the object. More...
void	initialize () override
	Receive and dispatch signal before the start of the event processing.
void	beginRun () override
	Receive and dispatch signal for the beginning of a new run.
void	beginEvent () override
	Receive and dispatch signal for the start of a new event.
void	endRun () override
	Receive and dispatch signal for the end of the run.
void	terminate () override
	Receive and dispatch Signal for termination of the event processing.

Protected Member Functions
void	addProcessingSignalListener (ProcessingSignalListener *psl)
	Register a processing signal listener to be notified.
int	getNProcessingSignalListener ()
	Get the number of currently registered listeners.

Private Types
using	Super = Filter< CDCSegmentTriple >
	Type of the base class.

Private Member Functions
const CDCRiemannFitter &	getFitter2D () const
	Returns the xy fitter instance that is used by this filter.
const CDCSZFitter &	getSZFitter () const
	Returns the sz fitter instance that is used by this filter.

Private Attributes
CDCSZFitter	m_szFitter
	Memory of the SZ fitter fitting sz lines to the stereo segments.
CDCRiemannFitter	m_riemannFitter
	Memory of the Riemann fitter for the circle fits.
std::vector< ProcessingSignalListener * >	m_subordinaryProcessingSignalListeners
	References to subordinary signal processing listener contained in this findlet.
bool	m_initialized = false
	Flag to keep track whether initialization happend before.
bool	m_terminated = false
	Flag to keep track whether termination happend before.
std::string	m_initializedAs
	Name of the type during initialisation.

Detailed Description

Filter for the constuction of segment triples based on simple criterions.

Definition at line 32 of file SimpleSegmentTripleFilter.h.

Member Function Documentation

exposeParameters()

void exposeParameters ( ModuleParamList *  moduleParamList, const std::string &  prefix  )

virtualinherited

Expose the set of parameters of the filter to the module parameter list.

Note that not all filters have yet exposed their parameters in this way.

This method is deprecated as the exposeParams below uses a less compile heavy equivalent.

Reimplemented in MCSymmetric< BaseSegmentTripleFilter >, and MCSegmentTripleFilter.

Definition at line 42 of file Filter.icc.h.

operator()() [1/2]

Weight operator() ( const CDCSegmentTriple &  segmentTriple )

finalvirtual

Checks if a triple of axial, stereo and axial segments is a good combination to be stored.

Checks the proper alignement and the quality of connection between all three segments. Returns NAN if the connection shall not be made or a finit value be used as the cell weight of the cell to constructed.

Reimplemented from Filter< CDCSegmentTriple >.

Definition at line 25 of file SimpleSegmentTripleFilter.cc.

{
  const CDCAxialSegment2D* ptrStartSegment = segmentTriple.getStartSegment();
  const CDCStereoSegment2D* ptrMiddleSegment = segmentTriple.getMiddleSegment();
  const CDCAxialSegment2D* ptrEndSegment = segmentTriple.getEndSegment();
 
  assert(ptrStartSegment);
  assert(ptrMiddleSegment);
  assert(ptrEndSegment);
 
  const CDCAxialSegment2D& startSegment = *ptrStartSegment;
  const CDCStereoSegment2D& middleSegment = *ptrMiddleSegment;
  const CDCAxialSegment2D& endSegment = *ptrEndSegment;
 
  const double toleranceFraction = 0.0;
 
  // Check if the middle segment lies within the acceptable bounds in angular deviation
  {
    //get the remembered fits
    const CDCTrajectory2D& startFit = startSegment.getTrajectory2D();
    const CDCTrajectory2D& endFit = endSegment.getTrajectory2D();
 
    //use only the first and last hit for this check
    const CDCRecoHit2D& firstHit = middleSegment.front();
    const CDCRecoHit2D& lastHit = middleSegment.back();
 
    Vector3D firstRecoPos = firstHit.reconstruct3D(startFit);
    Vector3D lastRecoPos = lastHit.reconstruct3D(endFit);
 
    const CDCWire& firstWire = firstHit.getWire();
    const CDCWire& lastWire = lastHit.getWire();
 
    const bool agrees =
      firstWire.isInCellZBounds(firstRecoPos, toleranceFraction) and
      lastWire.isInCellZBounds(lastRecoPos, toleranceFraction);
 
    if (not agrees) return NAN;
  }
 
  // make more complex judgement on fitness
 
  // Get the combined fit of start and end axial segment
  CDCTrajectory2D trajectory2D =  getFitter2D().fit(*(segmentTriple.getStartSegment()),
                                                    *(segmentTriple.getEndSegment()));
 
  // Check if the middle segment is actually coaligned with the trajectory
  EForwardBackward fbInfo = trajectory2D.isForwardOrBackwardTo(middleSegment);
  if (fbInfo != EForwardBackward::c_Forward) return NAN;
 
  // Reconstruct the middle stereo segment
  CDCSegment3D reconstructedMiddle;
  for (const CDCRecoHit2D& recoHit2D : middleSegment) {
    reconstructedMiddle.push_back(CDCRecoHit3D::reconstruct(recoHit2D, trajectory2D));
    if (not reconstructedMiddle.back().isInCellZBounds(toleranceFraction)) {
      B2DEBUG(100, "  RecoHit out of CDC");
      return NAN;
    }
  }
 
  // Fit the sz slope and intercept
  CDCTrajectorySZ trajectorySZ;
  getSZFitter().update(trajectorySZ, middleSegment, trajectory2D);
  segmentTriple.setTrajectory3D(CDCTrajectory3D(trajectory2D, trajectorySZ));
 
  Weight result = startSegment.size() + middleSegment.size() + endSegment.size();
 
  return result;
}

operator()() [2/2]

Weight operator() ( const Object *  obj )

inherited

Function to evaluate the object.

Base implementation accepts all objects, except nullptr.

Parameters

obj	The object to be accepted or rejected.

Returns

A finit float value if the object is accepted. NAN if the object is rejected. Nullptr is always rejected.

Definition at line 60 of file Filter.icc.h.

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

• tracking/trackFindingCDC/filters/segmentTriple/include/SimpleSegmentTripleFilter.h
• tracking/trackFindingCDC/filters/segmentTriple/src/SimpleSegmentTripleFilter.cc