SimHitHandle_TRTHit Class Reference

#include <SimHitHandle_TRTHit.h>

Inheritance diagram for SimHitHandle_TRTHit:

Collaboration diagram for SimHitHandle_TRTHit:

Classes
class	Imp

Public Member Functions
	SimHitHandle_TRTHit (const TRTUncompressedHit *)
virtual	~SimHitHandle_TRTHit ()
QString	type () const
Amg::Vector3D	momentumDirection () const
double	actualMomentum () const
Amg::Vector3D	posStart () const
Amg::Vector3D	posEnd () const
double	hitTime () const
int	actualPDGCodeFromSimHit () const
const HepMcParticleLink &	particleLink () const
Trk::TrackParameters *	createTrackParameters () const
double	momentum () const
int	pdg () const
SimBarCode	simBarCode () const
bool	hasCharge () const
double	charge () const
void	setFakeMomentum (const double &m)
void	setCharge (const double &c)
void	cacheMomentum ()

Private Member Functions
void	setPDG (int)

Private Attributes
Imp *	m_d
Trk::TrackParameters *	m_trackPars
int	m_pdgId
double	m_fakemom
double	m_charge

Detailed Description

Definition at line 23 of file SimHitHandle_TRTHit.h.

Constructor & Destructor Documentation

SimHitHandle_TRTHit()

SimHitHandle_TRTHit::SimHitHandle_TRTHit

(

const TRTUncompressedHit *

h

)

Definition at line 43 of file SimHitHandle_TRTHit.cxx.

  : SimHitHandleBase(), m_d(new Imp(h))
{
  if (!h)
    VP1Msg::message("SimHitHandle_TRTHit constructor ERROR: Received null hit pointer");
}

~SimHitHandle_TRTHit()

SimHitHandle_TRTHit::~SimHitHandle_TRTHit ( )

virtual

Definition at line 51 of file SimHitHandle_TRTHit.cxx.

{
  delete m_d;
}

Member Function Documentation

actualMomentum()

double SimHitHandle_TRTHit::actualMomentum ( ) const

virtual

Reimplemented from SimHitHandleBase.

Definition at line 69 of file SimHitHandle_TRTHit.cxx.

{
  bool ok;
  double mass = VP1ParticleData::particleMass(m_d->thehit->GetParticleEncoding(),ok);
  if (!ok) {
    VP1Msg::message("SimHitHandle_TRTHit constructor WARNING: Could not determine mass for pdg code "
            +QString::number(pdg())+". Assuming charged pion mass.");
    mass = ParticleConstants::chargedPionMassInMeV;//Charged pion mass
  }
  const double ekin = m_d->thehit->GetKineticEnergy()*CLHEP::MeV;
  const double gamma = 1.0 + ekin/mass;
  double betasq = 1.0-1.0/(gamma*gamma);
  if (betasq<=0.0)
    return 0.0;
  return sqrt(betasq)*(mass+ekin);
}

actualPDGCodeFromSimHit()

int SimHitHandle_TRTHit::actualPDGCodeFromSimHit ( ) const

virtual

Reimplemented from SimHitHandleBase.

Definition at line 162 of file SimHitHandle_TRTHit.cxx.

{
  return m_d->thehit->GetParticleEncoding();
}

cacheMomentum()

void SimHitHandleBase::cacheMomentum ( )

inlineinherited

Definition at line 58 of file SimHitHandleBase.h.

{ if (m_fakemom==-2) m_fakemom = actualMomentum(); }

charge()

double SimHitHandleBase::charge ( ) const

inlineinherited

Definition at line 51 of file SimHitHandleBase.h.

{ return m_charge; }

createTrackParameters()

Trk::TrackParameters * SimHitHandle_TRTHit::createTrackParameters ( ) const

virtual

Implements SimHitHandleBase.

Definition at line 168 of file SimHitHandle_TRTHit.cxx.

{
  if (!m_d->ensureDetElemInit())
    return nullptr;
  const Trk::StraightLineSurface * surf
    = dynamic_cast<const Trk::StraightLineSurface *>( &(m_d->detelem->strawSurface(m_d->strawID)));
  if (!surf) {
    VP1Msg::message("SimHitHandle_TRTHit::createTrackParameters ERROR: could not get Trk::StraightLineSurface");
    return nullptr;
  }
 
  double c;
  if ( !hasCharge() ) {
    bool ok;
    c = VP1ParticleData::particleCharge(m_d->thehit->GetParticleEncoding(),ok);
    if (!ok) {
      VP1Msg::message("SimHitHandle_TRTHit::createTrackParameters ERROR: Could not find particle charge (pdg="
              +QString::number(m_d->thehit->GetParticleEncoding())+"). Assuming charge=+1.");
      c = +1.0;
    } else {
      if (VP1Msg::verbose())
    VP1Msg::messageVerbose("Looked up particle charge for trt simhit with pdg code "+VP1Msg::str(m_d->thehit->GetParticleEncoding())+": "+VP1Msg::str(c));
    }
    const_cast<SimHitHandle_TRTHit*>(this)->setCharge(c);
  } else {
    c = charge();
  }
  return new Trk::AtaStraightLine(0.5*(posStart()+posEnd()),momentum()*momentumDirection(),c,*surf);
  //Fixme: Use constructor with local coords instead?:
}

hasCharge()

bool SimHitHandleBase::hasCharge ( ) const

inlineinherited

Definition at line 50 of file SimHitHandleBase.h.

{ return m_charge!=-99999.0; }

hitTime()

double SimHitHandle_TRTHit::hitTime ( ) const

virtual

Implements SimHitHandleBase.

Definition at line 150 of file SimHitHandle_TRTHit.cxx.

{
  return m_d->thehit->GetGlobalTime();
}

momentum()

double SimHitHandleBase::momentum ( ) const

inlineinherited

Definition at line 41 of file SimHitHandleBase.h.

{ return m_fakemom == -2 ? actualMomentum() : m_fakemom; }

momentumDirection()

Amg::Vector3D SimHitHandle_TRTHit::momentumDirection ( ) const

virtual

Implements SimHitHandleBase.

Definition at line 59 of file SimHitHandle_TRTHit.cxx.

{
  if (VP1Msg::verbose()&&posStart()==posEnd())
    VP1Msg::messageVerbose("SimHitHandle_SiHit::momentumDirection() ERROR: posStart()==posEnd()");
  Amg::Vector3D u((posEnd()-posStart()).unit());
//  return Trk::GlobalMomentum(u.x(),u.y(),u.z());
  return Amg::Vector3D(u.x(),u.y(),u.z());
}

particleLink()

const HepMcParticleLink & SimHitHandle_TRTHit::particleLink ( ) const

virtual

Implements SimHitHandleBase.

Definition at line 156 of file SimHitHandle_TRTHit.cxx.

{
  return m_d->thehit->particleLink();
}

pdg()

int SimHitHandleBase::pdg ( ) const

inlineinherited

Definition at line 82 of file SimHitHandleBase.h.

{
  return m_pdgId;
}

posEnd()

Amg::Vector3D SimHitHandle_TRTHit::posEnd ( ) const

virtual

Implements SimHitHandleBase.

Definition at line 142 of file SimHitHandle_TRTHit.cxx.

{
  if (!m_d->ensureDetElemInit())
    return Amg::Vector3D(0,0,0);
  return Amg::CLHEPTransformToEigen(m_d->detelem->getAbsoluteTransform(m_d->strawID)) * Amg::Vector3D(m_d->thehit->GetPostStepX(),m_d->thehit->GetPostStepY(),m_d->thehit->GetPostStepZ());
}

posStart()

Amg::Vector3D SimHitHandle_TRTHit::posStart ( ) const

virtual

Implements SimHitHandleBase.

Definition at line 134 of file SimHitHandle_TRTHit.cxx.

{
  if (!m_d->ensureDetElemInit())
    return Amg::Vector3D(0,0,0);
  return Amg::CLHEPTransformToEigen(m_d->detelem->getAbsoluteTransform(m_d->strawID)) * Amg::Vector3D(m_d->thehit->GetPreStepX(),m_d->thehit->GetPreStepY(),m_d->thehit->GetPreStepZ());
}

setCharge()

void SimHitHandleBase::setCharge ( const double &  c )

inlineinherited

Definition at line 57 of file SimHitHandleBase.h.

{ m_charge = c; }

setFakeMomentum()

void SimHitHandleBase::setFakeMomentum ( const double &  m )

inlineinherited

Definition at line 56 of file SimHitHandleBase.h.

{ m_fakemom = m; }

setPDG()

void SimHitHandleBase::setPDG ( int  pdg )

inlineprivateinherited

Definition at line 87 of file SimHitHandleBase.h.

{
  m_pdgId = pdg;
}

simBarCode()

SimBarCode SimHitHandleBase::simBarCode ( ) const

inlineinherited

Definition at line 48 of file SimHitHandleBase.h.

{ return SimBarCode(particleLink(),pdg()); }

type()

QString SimHitHandle_TRTHit::type ( ) const

inlinevirtual

Implements SimHitHandleBase.

Definition at line 29 of file SimHitHandle_TRTHit.h.

{ return "TRTUncompressedHit"; };

Member Data Documentation

m_charge

double SimHitHandleBase::m_charge

privateinherited

Definition at line 71 of file SimHitHandleBase.h.

m_d

Imp* SimHitHandle_TRTHit::m_d

private

Definition at line 44 of file SimHitHandle_TRTHit.h.

m_fakemom

double SimHitHandleBase::m_fakemom

privateinherited

Definition at line 70 of file SimHitHandleBase.h.

m_pdgId

int SimHitHandleBase::m_pdgId

privateinherited

Definition at line 68 of file SimHitHandleBase.h.

m_trackPars

Trk::TrackParameters* SimHitHandleBase::m_trackPars

mutableprivateinherited

Definition at line 67 of file SimHitHandleBase.h.

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

• SimHitHandle_TRTHit.h
• SimHitHandle_TRTHit.cxx