SiStripRecHitMatcher Class Reference

#include <SiStripRecHitMatcher.h>

Public Types
typedef std::function< void(SiStripMatchedRecHit2D const &)>	Collector
typedef SiStripMatchedRecHit2DCollectionNew::FastFiller	CollectorMatched
typedef SiStripRecHit2DCollectionNew::DetSet::const_iterator	RecHitIterator
typedef std::vector< const SiStripRecHit2D * >	SimpleHitCollection
typedef SimpleHitCollection::const_iterator	SimpleHitIterator
typedef std::pair< LocalPoint, LocalPoint >	StripPosition

Public Member Functions
template<typename MonoIterator , typename StereoIterator , typename CollectorHelper >
void	doubleMatch (MonoIterator monoRHiter, MonoIterator monoRHend, StereoIterator seconditer, StereoIterator seconditerend, const GluedGeomDet *gluedDet, LocalVector trdir, CollectorHelper &collectorHelper) const
std::unique_ptr < SiStripMatchedRecHit2D >	match (const SiStripRecHit2D *monoRH, const SiStripRecHit2D *stereoRH, const GluedGeomDet *gluedDet, LocalVector trackdirection, bool force) const
void	match (const SiStripRecHit2D *monoRH, RecHitIterator begin, RecHitIterator end, CollectorMatched &collector, const GluedGeomDet *gluedDet, LocalVector trackdirection) const
void	match (const SiStripRecHit2D *monoRH, SimpleHitIterator begin, SimpleHitIterator end, CollectorMatched &collector, const GluedGeomDet *gluedDet, LocalVector trackdirection) const
void	match (const SiStripRecHit2D *monoRH, SimpleHitIterator begin, SimpleHitIterator end, edm::OwnVector< SiStripMatchedRecHit2D > &collector, const GluedGeomDet *gluedDet, LocalVector trackdirection) const
void	match (const SiStripRecHit2D *monoRH, SimpleHitIterator begin, SimpleHitIterator end, std::vector< SiStripMatchedRecHit2D * > &collector, const GluedGeomDet *gluedDet, LocalVector trackdirection) const
void	match (const SiStripRecHit2D *monoRH, SimpleHitIterator begin, SimpleHitIterator end, Collector &collector, const GluedGeomDet *gluedDet, LocalVector trackdirection) const
	the actual implementation More...
bool	preFilter () const
StripPosition	project (const GeomDetUnit *det, const GluedGeomDet *glueddet, StripPosition strip, LocalVector trackdirection) const
	SiStripRecHitMatcher (const edm::ParameterSet &conf)
	SiStripRecHitMatcher (const double theScale)

Static Public Member Functions
static float	sigmaPitch (LocalPoint const &pos, LocalError const &err, const StripTopology &topol)

Public Attributes
bool	preFilter_ = false
float	scale_

Detailed Description

Definition at line 24 of file SiStripRecHitMatcher.h.

Member Typedef Documentation

typedef std::function<void(SiStripMatchedRecHit2D const&)> SiStripRecHitMatcher::Collector

Definition at line 33 of file SiStripRecHitMatcher.h.

typedef SiStripMatchedRecHit2DCollectionNew::FastFiller SiStripRecHitMatcher::CollectorMatched

Definition at line 27 of file SiStripRecHitMatcher.h.

typedef SiStripRecHit2DCollectionNew::DetSet::const_iterator SiStripRecHitMatcher::RecHitIterator

Definition at line 29 of file SiStripRecHitMatcher.h.

typedef std::vector<const SiStripRecHit2D*> SiStripRecHitMatcher::SimpleHitCollection

Definition at line 30 of file SiStripRecHitMatcher.h.

typedef SimpleHitCollection::const_iterator SiStripRecHitMatcher::SimpleHitIterator

Definition at line 31 of file SiStripRecHitMatcher.h.

typedef std::pair<LocalPoint, LocalPoint> SiStripRecHitMatcher::StripPosition

Definition at line 35 of file SiStripRecHitMatcher.h.

Constructor & Destructor Documentation

SiStripRecHitMatcher::SiStripRecHitMatcher

(

const edm::ParameterSet &

conf

)

Definition at line 15 of file SiStripRecHitMatcher.cc.

    : scale_(conf.getParameter<double>("NSigmaInside")),
      preFilter_(conf.existsAs<bool>("PreFilter") ? conf.getParameter<bool>("PreFilter") : false) {}

SiStripRecHitMatcher::SiStripRecHitMatcher

(

const double

theScale

)

Definition at line 19 of file SiStripRecHitMatcher.cc.

: scale_(theScale) {}

Member Function Documentation

template<typename MonoIterator , typename StereoIterator , typename CollectorHelper >

void SiStripRecHitMatcher::doubleMatch	(	MonoIterator	monoRHiter,
		MonoIterator	monoRHend,
		StereoIterator	seconditer,
		StereoIterator	seconditerend,
		const GluedGeomDet *	gluedDet,
		LocalVector	trdir,
		CollectorHelper &	collectorHelper
	)		const

Referenced by SiStripRecHitConverterAlgorithm::match().

std::unique_ptr< SiStripMatchedRecHit2D > SiStripRecHitMatcher::match	(	const SiStripRecHit2D *	monoRH,
		const SiStripRecHit2D *	stereoRH,
		const GluedGeomDet *	gluedDet,
		LocalVector	trackdirection,
		bool	force
	)		const

Definition at line 239 of file SiStripRecHitMatcher.cc.

References c, alignmentValidation::c1, change_name::diff, relativeConstraints::error, validate-o2o-wbm::f, StripTopology::localPosition(), BaseTrackerRecHit::localPosition(), BaseTrackerRecHit::localPositionError(), BaseTrackerRecHit::localPositionFast(), visualization-live-secondInstance_cfg::m, PV3DBase< T, PVType, FrameType >::mag2(), Topology::measurementPosition(), GluedGeomDet::monoDet(), position, project(), scale_, sigmaPitch(), GluedGeomDet::stereoDet(), GeomDet::surface(), toLocal(), GeomDet::topology(), x, and xy().

Referenced by TkGluedMeasurementDet::collectRecHits(), SiStripRecHitConverterAlgorithm::match(), match(), and TkClonerImpl::operator()().

                                                                                      {
  // stripdet = mono
  // partnerstripdet = stereo
  const GeomDetUnit* stripdet = gluedDet->monoDet();
  const GeomDetUnit* partnerstripdet = gluedDet->stereoDet();
  const StripTopology& topol = (const StripTopology&)stripdet->topology();

  // position of the initial and final point of the strip (RPHI cluster) in local strip coordinates
  auto RPHIpointX = topol.measurementPosition(monoRH->localPositionFast()).x();
  MeasurementPoint RPHIpointini(RPHIpointX, -0.5f);
  MeasurementPoint RPHIpointend(RPHIpointX, 0.5f);

  // position of the initial and final point of the strip in local coordinates (mono det)
  StripPosition stripmono = StripPosition(topol.localPosition(RPHIpointini), topol.localPosition(RPHIpointend));

  // in case of no track hypothesis assume a track from the origin through the center of the strip
  if (trackdirection.mag2() < FLT_MIN) {
    const LocalPoint& lcenterofstrip = monoRH->localPositionFast();
    GlobalPoint gcenterofstrip = (stripdet->surface()).toGlobal(lcenterofstrip);
    GlobalVector gtrackdirection = gcenterofstrip - GlobalPoint(0, 0, 0);
    trackdirection = (gluedDet->surface()).toLocal(gtrackdirection);
  }

  //project mono hit on glued det
  StripPosition projectedstripmono = project(stripdet, gluedDet, stripmono, trackdirection);
  const StripTopology& partnertopol = (const StripTopology&)partnerstripdet->topology();

  double m00 = -(projectedstripmono.second.y() - projectedstripmono.first.y());
  double m01 = (projectedstripmono.second.x() - projectedstripmono.first.x());
  double c0 = m01 * projectedstripmono.first.y() + m00 * projectedstripmono.first.x();

  //error calculation (the part that depends on mono RH only)
  //  LocalVector  RPHIpositiononGluedendvector=projectedstripmono.second-projectedstripmono.first;
  /*
  double l1 = 1./RPHIpositiononGluedendvector.perp2();
  double c1 = RPHIpositiononGluedendvector.y();
  double s1 =-RPHIpositiononGluedendvector.x();
  */
  double c1 = -m00;
  double s1 = -m01;
  double l1 = 1. / (c1 * c1 + s1 * s1);

  double sigmap12 = sigmaPitch(monoRH->localPosition(), monoRH->localPositionError(), topol);
  // auto sigmap12 = monoRH->sigmaPitch();
  // assert(sigmap12>=0);

  // position of the initial and final point of the strip (STEREO cluster)
  auto STEREOpointX = partnertopol.measurementPosition(stereoRH->localPositionFast()).x();
  MeasurementPoint STEREOpointini(STEREOpointX, -0.5f);
  MeasurementPoint STEREOpointend(STEREOpointX, 0.5f);

  // position of the initial and final point of the strip in local coordinates (stereo det)
  StripPosition stripstereo(partnertopol.localPosition(STEREOpointini), partnertopol.localPosition(STEREOpointend));

  //project stereo hit on glued det
  StripPosition projectedstripstereo = project(partnerstripdet, gluedDet, stripstereo, trackdirection);

  double m10 = -(projectedstripstereo.second.y() - projectedstripstereo.first.y());
  double m11 = (projectedstripstereo.second.x() - projectedstripstereo.first.x());

  //perform the matching
  //(x2-x1)(y-y1)=(y2-y1)(x-x1)
  AlgebraicMatrix22 m(ROOT::Math::SMatrixNoInit{});
  AlgebraicVector2 c(c0, m11 * projectedstripstereo.first.y() + m10 * projectedstripstereo.first.x());
  m(0, 0) = m00;
  m(0, 1) = m01;
  m(1, 0) = m10;
  m(1, 1) = m11;
  m.Invert();
  AlgebraicVector2 solution = m * c;
  Local2DPoint position(solution(0), solution(1));

  if ((!force) && (!((gluedDet->surface()).bounds().inside(position, 10.f * scale_))))
    return std::unique_ptr<SiStripMatchedRecHit2D>(nullptr);

  double c2 = -m10;
  double s2 = -m11;
  double l2 = 1. / (c2 * c2 + s2 * s2);

  double sigmap22 = sigmaPitch(stereoRH->localPosition(), stereoRH->localPositionError(), partnertopol);
  // auto sigmap22 = stereoRH->sigmaPitch();
  // assert (sigmap22>0);

  double diff = (c1 * s2 - c2 * s1);
  double invdet2 = 1 / (diff * diff * l1 * l2);
  float xx = invdet2 * (sigmap12 * s2 * s2 * l2 + sigmap22 * s1 * s1 * l1);
  float xy = -invdet2 * (sigmap12 * c2 * s2 * l2 + sigmap22 * c1 * s1 * l1);
  float yy = invdet2 * (sigmap12 * c2 * c2 * l2 + sigmap22 * c1 * c1 * l1);
  LocalError error(xx, xy, yy);

  //if it is inside the gluedet bonds
  //Change NSigmaInside in the configuration file to accept more hits
  if (force || (gluedDet->surface()).bounds().inside(position, error, scale_))
    return std::make_unique<SiStripMatchedRecHit2D>(LocalPoint(position), error, *gluedDet, monoRH, stereoRH);
  return std::unique_ptr<SiStripMatchedRecHit2D>(nullptr);
}

void SiStripRecHitMatcher::match	(	const SiStripRecHit2D *	monoRH,
		RecHitIterator	begin,
		RecHitIterator	end,
		CollectorMatched &	collector,
		const GluedGeomDet *	gluedDet,
		LocalVector	trackdirection
	)		const

Definition at line 64 of file SiStripRecHitMatcher.cc.

References dataset::end, mps_fire::i, and match().

                                                                   {
  // is this really needed now????
  SimpleHitCollection stereoHits;
  stereoHits.reserve(end - begin);
  for (RecHitIterator i = begin; i != end; ++i)
    stereoHits.push_back(&(*i));  // convert to simple pointer

  return match(monoRH, stereoHits.begin(), stereoHits.end(), collector, gluedDet, trackdirection);
}

void SiStripRecHitMatcher::match	(	const SiStripRecHit2D *	monoRH,
		SimpleHitIterator	begin,
		SimpleHitIterator	end,
		CollectorMatched &	collector,
		const GluedGeomDet *	gluedDet,
		LocalVector	trackdirection
	)		const

Definition at line 53 of file SiStripRecHitMatcher.cc.

References match(), and mps_fire::result.

                                                                   {
  Collector result(std::bind(pb2, std::ref(collector), std::placeholders::_1));
  match(monoRH, begin, end, result, gluedDet, trackdirection);
}

void SiStripRecHitMatcher::match	(	const SiStripRecHit2D *	monoRH,
		SimpleHitIterator	begin,
		SimpleHitIterator	end,
		edm::OwnVector< SiStripMatchedRecHit2D > &	collector,
		const GluedGeomDet *	gluedDet,
		LocalVector	trackdirection
	)		const

Definition at line 29 of file SiStripRecHitMatcher.cc.

References match(), AlCaHLTBitMon_ParallelJobs::p, edm::OwnVector< T, P >::push_back(), and mps_fire::result.

                                                                   {
  std::vector<SiStripMatchedRecHit2D*> result;
  result.reserve(end - begin);
  match(monoRH, begin, end, result, gluedDet, trackdirection);
  for (std::vector<SiStripMatchedRecHit2D*>::iterator p = result.begin(); p != result.end(); p++)
    collector.push_back(*p);
}

void SiStripRecHitMatcher::match	(	const SiStripRecHit2D *	monoRH,
		SimpleHitIterator	begin,
		SimpleHitIterator	end,
		std::vector< SiStripMatchedRecHit2D * > &	collector,
		const GluedGeomDet *	gluedDet,
		LocalVector	trackdirection
	)		const

Definition at line 42 of file SiStripRecHitMatcher.cc.

References SiStripMatchedRecHit2D::clone(), match(), and mps_fire::result.

                                                                   {
  Collector result(
      std::bind(&pb1, std::ref(collector), std::bind(&SiStripMatchedRecHit2D::clone, std::placeholders::_1)));
  match(monoRH, begin, end, result, gluedDet, trackdirection);
}

void SiStripRecHitMatcher::match	(	const SiStripRecHit2D *	monoRH,
		SimpleHitIterator	begin,
		SimpleHitIterator	end,
		Collector &	collector,
		const GluedGeomDet *	gluedDet,
		LocalVector	trackdirection
	)		const

the actual implementation

Definition at line 80 of file SiStripRecHitMatcher.cc.

References c, alignmentValidation::c1, change_name::diff, dataset::end, relativeConstraints::error, StripTopology::localPosition(), BaseTrackerRecHit::localPosition(), BaseTrackerRecHit::localPositionError(), BaseTrackerRecHit::localPositionFast(), visualization-live-secondInstance_cfg::m, PV3DBase< T, PVType, FrameType >::mag2(), Topology::measurementPosition(), GluedGeomDet::monoDet(), position, project(), scale_, sigmaPitch(), GluedGeomDet::stereoDet(), GeomDet::surface(), toLocal(), GeomDet::topology(), x, and xy().

                                                                   {
  // stripdet = mono
  // partnerstripdet = stereo
  const GeomDetUnit* stripdet = gluedDet->monoDet();
  const GeomDetUnit* partnerstripdet = gluedDet->stereoDet();
  const StripTopology& topol = (const StripTopology&)stripdet->topology();

  // position of the initial and final point of the strip (RPHI cluster) in local strip coordinates
  double RPHIpointX = topol.measurementPosition(monoRH->localPositionFast()).x();
  MeasurementPoint RPHIpointini(RPHIpointX, -0.5);
  MeasurementPoint RPHIpointend(RPHIpointX, 0.5);

  // position of the initial and final point of the strip in local coordinates (mono det)
  StripPosition stripmono = StripPosition(topol.localPosition(RPHIpointini), topol.localPosition(RPHIpointend));

  // in case of no track hypothesis assume a track from the origin through the center of the strip
  if (trackdirection.mag2() < FLT_MIN) {
    const LocalPoint& lcenterofstrip = monoRH->localPositionFast();
    GlobalPoint gcenterofstrip = (stripdet->surface()).toGlobal(lcenterofstrip);
    GlobalVector gtrackdirection = gcenterofstrip - GlobalPoint(0, 0, 0);
    trackdirection = (gluedDet->surface()).toLocal(gtrackdirection);
  }

  //project mono hit on glued det
  StripPosition projectedstripmono = project(stripdet, gluedDet, stripmono, trackdirection);
  const StripTopology& partnertopol = (const StripTopology&)partnerstripdet->topology();

  double m00 = -(projectedstripmono.second.y() - projectedstripmono.first.y());
  double m01 = (projectedstripmono.second.x() - projectedstripmono.first.x());
  double c0 = m01 * projectedstripmono.first.y() + m00 * projectedstripmono.first.x();

  //error calculation (the part that depends on mono RH only)
  //  LocalVector  RPHIpositiononGluedendvector=projectedstripmono.second-projectedstripmono.first;
  /*
  double l1 = 1./RPHIpositiononGluedendvector.perp2();
  double c1 = RPHIpositiononGluedendvector.y();
  double s1 =-RPHIpositiononGluedendvector.x();
  */
  double c1 = -m00;
  double s1 = -m01;
  double l1 = 1. / (c1 * c1 + s1 * s1);

  double sigmap12 = sigmaPitch(monoRH->localPosition(), monoRH->localPositionError(), topol);
  // auto sigmap12 = monoRH->sigmaPitch();
  // assert(sigmap12>=0);

  SimpleHitIterator seconditer;

  for (seconditer = begin; seconditer != end; ++seconditer) {  //iterate on stereo rechits

    // position of the initial and final point of the strip (STEREO cluster)
    double STEREOpointX = partnertopol.measurementPosition((*seconditer)->localPositionFast()).x();
    MeasurementPoint STEREOpointini(STEREOpointX, -0.5);
    MeasurementPoint STEREOpointend(STEREOpointX, 0.5);

    // position of the initial and final point of the strip in local coordinates (stereo det)
    StripPosition stripstereo(partnertopol.localPosition(STEREOpointini), partnertopol.localPosition(STEREOpointend));

    //project stereo hit on glued det
    StripPosition projectedstripstereo = project(partnerstripdet, gluedDet, stripstereo, trackdirection);

    double m10 = -(projectedstripstereo.second.y() - projectedstripstereo.first.y());
    double m11 = (projectedstripstereo.second.x() - projectedstripstereo.first.x());

    //perform the matching
    //(x2-x1)(y-y1)=(y2-y1)(x-x1)
    AlgebraicMatrix22 m;
    AlgebraicVector2 c;  // FIXME understand why moving this initializer out of the loop changes the output!
    m(0, 0) = m00;
    m(0, 1) = m01;
    m(1, 0) = m10;
    m(1, 1) = m11;
    c(0) = c0;
    c(1) = m11 * projectedstripstereo.first.y() + m10 * projectedstripstereo.first.x();
    m.Invert();
    AlgebraicVector2 solution = m * c;
    LocalPoint position(solution(0), solution(1));

    /*
    {
      double m00 = -(projectedstripmono.second.y()-projectedstripmono.first.y()); 
      double m01 =  (projectedstripmono.second.x()-projectedstripmono.first.x());
      double m10 = -(projectedstripstereo.second.y()-projectedstripstereo.first.y()); 
      double m11 =  (projectedstripstereo.second.x()-projectedstripstereo.first.x());
      double c0  =  m01*projectedstripmono.first.y()   + m00*projectedstripmono.first.x();
      double c1  =  m11*projectedstripstereo.first.y() + m10*projectedstripstereo.first.x();
      
      double invDet = 1./(m00*m11-m10*m01);
    }
    */

    //
    // temporary fix by tommaso
    //

    LocalError tempError(100, 0, 100);
    if (!((gluedDet->surface()).bounds().inside(position, tempError, scale_)))
      continue;

    // then calculate the error
    /*
    LocalVector  stereopositiononGluedendvector=projectedstripstereo.second-projectedstripstereo.first;
    double l2 = 1./stereopositiononGluedendvector.perp2();
    double c2 = stereopositiononGluedendvector.y(); 
    double s2 =-stereopositiononGluedendvector.x();
    */

    double c2 = -m10;
    double s2 = -m11;
    double l2 = 1. / (c2 * c2 + s2 * s2);

    double sigmap22 = sigmaPitch((*seconditer)->localPosition(), (*seconditer)->localPositionError(), partnertopol);
    // auto sigmap22 = (*seconditer)->sigmaPitch();
    // assert(sigmap22>=0);

    double diff = (c1 * s2 - c2 * s1);
    double invdet2 = 1 / (diff * diff * l1 * l2);
    float xx = invdet2 * (sigmap12 * s2 * s2 * l2 + sigmap22 * s1 * s1 * l1);
    float xy = -invdet2 * (sigmap12 * c2 * s2 * l2 + sigmap22 * c1 * s1 * l1);
    float yy = invdet2 * (sigmap12 * c2 * c2 * l2 + sigmap22 * c1 * c1 * l1);
    LocalError error(xx, xy, yy);

    if ((gluedDet->surface()).bounds().inside(position, error, scale_)) {  //if it is inside the gluedet bonds
      //Change NSigmaInside in the configuration file to accept more hits
      //...and add it to the Rechit collection

      const SiStripRecHit2D* secondHit = *seconditer;
      collector(SiStripMatchedRecHit2D(position, error, *gluedDet, monoRH, secondHit));
    }
  }
}

bool SiStripRecHitMatcher::preFilter ( ) const

inline

Definition at line 40 of file SiStripRecHitMatcher.h.

References preFilter_.

{ return preFilter_; }

SiStripRecHitMatcher::StripPosition SiStripRecHitMatcher::project	(	const GeomDetUnit *	det,
		const GluedGeomDet *	glueddet,
		StripPosition	strip,
		LocalVector	trackdirection
	)		const

Definition at line 217 of file SiStripRecHitMatcher.cc.

References pileupReCalc_HLTpaths::scale, GeomDet::surface(), toLocal(), and PV3DBase< T, PVType, FrameType >::z().

Referenced by match().

                                                                                                    {
  GlobalPoint globalpointini = (det->surface()).toGlobal(strip.first);
  GlobalPoint globalpointend = (det->surface()).toGlobal(strip.second);

  // position of the initial and final point of the strip in glued local coordinates
  LocalPoint positiononGluedini = (glueddet->surface()).toLocal(globalpointini);
  LocalPoint positiononGluedend = (glueddet->surface()).toLocal(globalpointend);

  //correct the position with the track direction

  float scale = -positiononGluedini.z() / trackdirection.z();

  LocalPoint projpositiononGluedini = positiononGluedini + scale * trackdirection;
  LocalPoint projpositiononGluedend = positiononGluedend + scale * trackdirection;

  return StripPosition(projpositiononGluedini, projpositiononGluedend);
}

static float SiStripRecHitMatcher::sigmaPitch ( LocalPoint const &  pos, LocalError const &  err, const StripTopology &  topol  )

inlinestatic

Definition at line 42 of file SiStripRecHitMatcher.h.

References relativeConstraints::error, StripTopology::localPitch(), Topology::measurementError(), and MeasurementError::uu().

Referenced by match().

                                                                                                           {
    MeasurementError error = topol.measurementError(pos, err);
    auto pitch = topol.localPitch(pos);
    return error.uu() * pitch * pitch;
  }

Member Data Documentation

bool SiStripRecHitMatcher::preFilter_ = false

Definition at line 111 of file SiStripRecHitMatcher.h.

Referenced by preFilter().

float SiStripRecHitMatcher::scale_

Definition at line 110 of file SiStripRecHitMatcher.h.

Referenced by match().