Trk::TrkDistanceFinderNeutralCharged Class Reference

#include <TrkDistanceFinderNeutralCharged.h>

Inheritance diagram for Trk::TrkDistanceFinderNeutralCharged:

Collaboration diagram for Trk::TrkDistanceFinderNeutralCharged:

Public Member Functions
	TrkDistanceFinderNeutralCharged (const std::string &t, const std::string &n, const IInterface *p)
	~TrkDistanceFinderNeutralCharged ()
std::pair< Amg::Vector3D, double >	getPointAndDistance (const Trk::NeutralTrack &, const Trk::Perigee &, double &, MagField::AtlasFieldCache &fieldCache) const
ServiceHandle< StoreGateSvc > &	evtStore ()
	The standard StoreGateSvc (event store) Returns (kind of) a pointer to the StoreGateSvc.
const ServiceHandle< StoreGateSvc > &	detStore () const
	The standard StoreGateSvc/DetectorStore Returns (kind of) a pointer to the StoreGateSvc.
virtual StatusCode	sysInitialize () override
	Perform system initialization for an algorithm.
virtual StatusCode	sysStart () override
	Handle START transition.
virtual std::vector< Gaudi::DataHandle * >	inputHandles () const override
	Return this algorithm's input handles.
virtual std::vector< Gaudi::DataHandle * >	outputHandles () const override
	Return this algorithm's output handles.
Gaudi::Details::PropertyBase &	declareProperty (Gaudi::Property< T, V, H > &t)
void	updateVHKA (Gaudi::Details::PropertyBase &)
MsgStream &	msg () const
bool	msgLvl (const MSG::Level lvl) const

Static Public Member Functions
static const InterfaceID &	interfaceID ()

Protected Member Functions
void	renounceArray (SG::VarHandleKeyArray &handlesArray)
	remove all handles from I/O resolution
std::enable_if_t< std::is_void_v< std::result_of_t< decltype(&T::renounce)(T)> > &&!std::is_base_of_v< SG::VarHandleKeyArray, T > &&std::is_base_of_v< Gaudi::DataHandle, T >, void >	renounce (T &h)
void	extraDeps_update_handler (Gaudi::Details::PropertyBase &ExtraDeps)
	Add StoreName to extra input/output deps as needed.

Private Types
typedef ServiceHandle< StoreGateSvc >	StoreGateSvc_t

Private Member Functions
Gaudi::Details::PropertyBase &	declareGaudiProperty (Gaudi::Property< T, V, H > &hndl, const SG::VarHandleKeyType &)
	specialization for handling Gaudi::Property<SG::VarHandleKey>

Private Attributes
double	m_precision
double	m_maxloopnumber
StoreGateSvc_t	m_evtStore
	Pointer to StoreGate (event store by default)
StoreGateSvc_t	m_detStore
	Pointer to StoreGate (detector store by default)
std::vector< SG::VarHandleKeyArray * >	m_vhka
bool	m_varHandleArraysDeclared

Detailed Description

Definition at line 22 of file TrkDistanceFinderNeutralCharged.h.

Member Typedef Documentation

StoreGateSvc_t

typedef ServiceHandle<StoreGateSvc> AthCommonDataStore< AthCommonMsg< AlgTool > >::StoreGateSvc_t

privateinherited

Definition at line 388 of file AthCommonDataStore.h.

Constructor & Destructor Documentation

TrkDistanceFinderNeutralCharged()

Trk::TrkDistanceFinderNeutralCharged::TrkDistanceFinderNeutralCharged	(	const std::string &	t,
		const std::string &	n,
		const IInterface *	p )

Definition at line 22 of file TrkDistanceFinderNeutralCharged.cxx.

                                                                                                                             : 
  AthAlgTool(t,n,p),
  m_precision(1e-8),
  m_maxloopnumber(20)
{
  declareProperty("Precision",m_precision);
  declareProperty("MaxLoops",m_maxloopnumber);
  declareInterface<TrkDistanceFinderNeutralCharged>(this);
  
}

~TrkDistanceFinderNeutralCharged()

Trk::TrkDistanceFinderNeutralCharged::~TrkDistanceFinderNeutralCharged ( )

default

Member Function Documentation

declareGaudiProperty()

Gaudi::Details::PropertyBase & AthCommonDataStore< AthCommonMsg< AlgTool > >::declareGaudiProperty ( Gaudi::Property< T, V, H > & hndl, const SG::VarHandleKeyType &  )

inlineprivateinherited

specialization for handling Gaudi::Property<SG::VarHandleKey>

Definition at line 156 of file AthCommonDataStore.h.

  {
    return *AthCommonDataStore<PBASE>::declareProperty(hndl.name(),
                                                       hndl.value(), 
                                                       hndl.documentation());
 
  }

declareProperty()

Gaudi::Details::PropertyBase & AthCommonDataStore< AthCommonMsg< AlgTool > >::declareProperty ( Gaudi::Property< T, V, H > & t )

inlineinherited

Definition at line 145 of file AthCommonDataStore.h.

                                                                     {
    typedef typename SG::HandleClassifier<T>::type htype;
    return AthCommonDataStore<PBASE>::declareGaudiProperty(t, htype());
  }

detStore()

const ServiceHandle< StoreGateSvc > & AthCommonDataStore< AthCommonMsg< AlgTool > >::detStore ( ) const

inlineinherited

The standard StoreGateSvc/DetectorStore Returns (kind of) a pointer to the StoreGateSvc.

Definition at line 95 of file AthCommonDataStore.h.

{ return m_detStore; }

evtStore()

ServiceHandle< StoreGateSvc > & AthCommonDataStore< AthCommonMsg< AlgTool > >::evtStore ( )

inlineinherited

The standard StoreGateSvc (event store) Returns (kind of) a pointer to the StoreGateSvc.

Definition at line 85 of file AthCommonDataStore.h.

{ return m_evtStore; }

extraDeps_update_handler()

void AthCommonDataStore< AthCommonMsg< AlgTool > >::extraDeps_update_handler ( Gaudi::Details::PropertyBase & ExtraDeps )

protectedinherited

Add StoreName to extra input/output deps as needed.

use the logic of the VarHandleKey to parse the DataObjID keys supplied via the ExtraInputs and ExtraOuputs Properties to add the StoreName if it's not explicitly given

getPointAndDistance()

std::pair< Amg::Vector3D, double > Trk::TrkDistanceFinderNeutralCharged::getPointAndDistance	(	const Trk::NeutralTrack &	neutraltrk,
		const Trk::Perigee &	chargedtrk,
		double &	distanceOnAxis,
		MagField::AtlasFieldCache &	fieldCache ) const

Definition at line 37 of file TrkDistanceFinderNeutralCharged.cxx.

                                                                                                {
 
  double b_phi0=chargedtrk.parameters()[Trk::phi0];
  double b_cosphi0=cos(b_phi0);
  double b_sinphi0=sin(b_phi0);
  double b_x0=chargedtrk.associatedSurface().center().x()-
    chargedtrk.parameters()[Trk::d0]*b_sinphi0;
  double b_y0=chargedtrk.associatedSurface().center().y()+
    chargedtrk.parameters()[Trk::d0]*b_cosphi0;
  double b_z0=chargedtrk.associatedSurface().center().z()+
    chargedtrk.parameters()[Trk::z0];
 
  Amg::Vector3D magnFieldVect;
  fieldCache.getField(chargedtrk.associatedSurface().center().data(),magnFieldVect.data());
 
  //Magnetic field at (x0,y0,z0)
  double Bz=magnFieldVect.z()*299.792;//B field in Gev/mm
 
  double b_Rt=getRadiusOfCurvature(chargedtrk,Bz);
 
  double b_cottheta=1./tan(chargedtrk.parameters()[Trk::theta]);
  
  //for neutrals
  double a_x0=neutraltrk.position()[0];
  double a_y0=neutraltrk.position()[1];
  double a_z0=neutraltrk.position()[2];
  double a_px=neutraltrk.momentum()[0];
  double a_py=neutraltrk.momentum()[1];
  double a_pz=neutraltrk.momentum()[2];
 
  
  //more elaborate pieces for later
  double DxNoVar=b_x0+b_Rt*b_sinphi0-a_x0;
  double DyNoVar=b_y0-b_Rt*b_cosphi0-a_y0;
  double DzNoVar=b_z0+b_Rt*b_cottheta*b_phi0-a_z0;
 
  //start in both cases from the vertex
  double b_phi=b_phi0;
  double b_cosphi=cos(b_phi);
  double b_sinphi=sin(b_phi);
  double a_lambda=0.;
 
  double deltab_phi=0.;
  double deltaa_lambda=0.;
 
  int loopsnumber=0;
 
  bool isok=false;
 
  bool secondTimeSaddleProblem=false;
 
  while (!isok) {
 
    //    std::cout << "Loop number: " << loopsnumber << std::endl;
    //    std::cout << "phi is: " << b_phi << " lambda " << a_lambda << std::endl;
 
    //ONLY FOR DEBUG * from here
 
    double x1fin=b_x0+b_Rt*(sin(b_phi0)-sin(b_phi));
    double y1fin=b_y0+b_Rt*(cos(b_phi)-cos(b_phi0));
    double z1fin=b_z0+b_Rt*b_cottheta*(b_phi0-b_phi);
    
    double x2fin=a_x0+a_px*a_lambda;
    double y2fin=a_y0+a_py*a_lambda;
    double z2fin=a_z0+a_pz*a_lambda;
    
    ATH_MSG_VERBOSE ("x1fin " << x1fin << "y1fin " << y1fin << "z1fin " << z1fin);
    ATH_MSG_VERBOSE ("x2fin " << x2fin << "y2fin " << y2fin << "z2fin " << z2fin);
    
    double distance = sqrt((x1fin-x2fin)*(x1fin-x2fin)+
               (y1fin-y2fin)*(y1fin-y2fin)+
               (z1fin-z2fin)*(z1fin-z2fin));
 
    ATH_MSG_VERBOSE ("distance " << distance);
 
    //to here (please delete afterwards)
 
    loopsnumber+=1;
 
    double d1db_phi=((DxNoVar-a_px*a_lambda)*(-b_Rt*b_cosphi)+
               (DyNoVar-a_py*a_lambda)*(-b_Rt*b_sinphi)+
               (DzNoVar-b_Rt*b_phi*b_cottheta-a_pz*a_lambda)*(-b_Rt*b_cottheta));
 
    double d1da_lambda=((DxNoVar-b_Rt*b_sinphi-a_px*a_lambda)*(-a_px)+
              (DyNoVar+b_Rt*b_cosphi-a_py*a_lambda)*(-a_py)+
              (DzNoVar-b_Rt*b_cottheta*b_phi-a_pz*a_lambda)*(-a_pz));
 
    //second derivatives (d^2/d^2(a) d^2/d^2(b) d^2/d(a)d(b) )
 
    double d2db_phi2=((DxNoVar-a_px*a_lambda)*(b_Rt*b_sinphi)+
            (DyNoVar-a_py*a_lambda)*(-b_Rt*b_cosphi)+
            (b_Rt*b_cottheta*b_Rt*b_cottheta));
    
    double d2dadb_lambdaphi=a_px*b_Rt*b_cosphi+a_py*b_Rt*b_sinphi+a_pz*b_Rt*b_cottheta;
 
    //    double m_d2da_lambda2=((DxNoVar-b_Rt*b_sinphi-a_px*a_lambda)*(a_px*a_px)+
    //         (DyNoVar+b_Rt*b_cosphi-a_py*a_lambda)*(a_py*a_py)+
    //         (DzNoVar-b_Rt*b_cottheta*b_phi-a_pz*a_lambda)*(a_pz*a_pz));
 
    //small error :-)
 
    double d2da_lambda2=((a_px*a_px)+
               (a_py*a_py)+
               (a_pz*a_pz));
    
 
    ATH_MSG_VERBOSE (" d1db_phi: " << d1db_phi << " d1da_lambda " << d1da_lambda);
 
    ATH_MSG_VERBOSE (" d2phi2 " << d2db_phi2 << " d2lambda2 " <<d2da_lambda2  << 
        " d2lambdaphi " << d2dadb_lambdaphi);
 
    
    double det=d2da_lambda2*d2db_phi2-d2dadb_lambdaphi*d2dadb_lambdaphi;
 
    if (det<0) {
      if (!secondTimeSaddleProblem) 
      {
        secondTimeSaddleProblem=true;
 
        ATH_MSG_DEBUG ("Now try first to recover from the problem");
        double denominator=1./((a_px*a_px)+(a_py*a_py));
        double firstTerm=(DxNoVar*a_px+DyNoVar*a_py)*denominator;
        double toSquare=(a_px*DyNoVar-a_py*DxNoVar);
        double toSqrt=b_Rt*b_Rt/denominator-toSquare*toSquare;
        if (toSqrt<0)
        {
          ATH_MSG_WARNING ("No intersection between neutral and charged track can be found. SKipping...");
          continue;
        }
        
        double secondTerm=TMath::Sqrt(toSqrt)*denominator;
        double lambda1=firstTerm+secondTerm;
        double lambda2=firstTerm-secondTerm;
 
        ATH_MSG_VERBOSE ("first solution: " << lambda1 << " second solution " << lambda2);
        
        double phi1=TMath::ATan2((DxNoVar-a_px*lambda1)/b_Rt,-(DyNoVar-a_py*lambda1)/b_Rt);
        double phi2=TMath::ATan2((DxNoVar-a_px*lambda2)/b_Rt,-(DyNoVar-a_py*lambda2)/b_Rt);
 
        double x1case1=b_x0+b_Rt*(sin(b_phi0)-sin(phi1));
        double y1case1=b_y0+b_Rt*(cos(phi1)-cos(b_phi0));
        double z1case1=b_z0+b_Rt*b_cottheta*(b_phi0-phi1);
        
        double x2case1=a_x0+a_px*lambda1;
        double y2case1=a_y0+a_py*lambda1;
        double z2case1=a_z0+a_pz*lambda1;
 
        double x1case2=b_x0+b_Rt*(sin(b_phi0)-sin(phi2));
        double y1case2=b_y0+b_Rt*(cos(phi2)-cos(b_phi0));
        double z1case2=b_z0+b_Rt*b_cottheta*(b_phi0-phi2);
        
        double x2case2=a_x0+a_px*lambda2;
        double y2case2=a_y0+a_py*lambda2;
        double z2case2=a_z0+a_pz*lambda2;
 
        ATH_MSG_VERBOSE ("solution1 x1: " << x1case1 << " x2: " << x2case1 << " y1: " << y1case1 << " y2: " << y2case1);
        ATH_MSG_VERBOSE ("solution2 x1: " << x1case2 << " x2: " << x2case2 << " y1: " << y1case2 << " y2: " << y2case2);
 
        double deltaz1=fabs(z2case1-z1case1);
        double deltaz2=fabs(z2case2-z1case2);
 
        ATH_MSG_VERBOSE (" deltaz1: " << deltaz1 << " deltaz2: " << deltaz2);
 
        if (deltaz1<=deltaz2)
        {
          b_phi=phi1;
          a_lambda=lambda1;
        }
        else
        {
          b_phi=phi2;
          a_lambda=lambda2;
        }
        //store cos and sin of phi
        b_cosphi=cos(b_phi);
        b_sinphi=sin(b_phi);
        continue;
      }
      
      
        ATH_MSG_WARNING ("Hessian is negative: saddle point");
        throw Error::NewtonProblem("Hessian is negative");
      
    }
    if (det>0&&d2da_lambda2<0) {
      ATH_MSG_WARNING("Hessian indicates a maximum: derivative will be zero but result incorrect");
      throw Error::NewtonProblem("Maximum point found");
    }
 
    //Now apply the Newton formula in more than one dimension
    deltaa_lambda=-(d2db_phi2*d1da_lambda-d2dadb_lambdaphi*d1db_phi)/det;
    deltab_phi=-(-d2dadb_lambdaphi*d1da_lambda+d2da_lambda2*d1db_phi)/det;
 
    a_lambda+=deltaa_lambda;
    b_phi+=deltab_phi;
    
    //store cos and sin of phi
    b_cosphi=cos(b_phi);
    b_sinphi=sin(b_phi);
 
    if (sqrt(std::pow(deltaa_lambda,2)+std::pow(deltab_phi,2))<m_precision || 
    loopsnumber>m_maxloopnumber) isok=true;
 
  }
  
  if (loopsnumber>m_maxloopnumber) throw Error::NewtonProblem("Could not find minimum distance: max loops number reached"); //now return error, see how to do it...
  
  double x1fin=b_x0+b_Rt*(sin(b_phi0)-sin(b_phi));
  double y1fin=b_y0+b_Rt*(cos(b_phi)-cos(b_phi0));
  double z1fin=b_z0+b_Rt*b_cottheta*(b_phi0-b_phi);
  
  double x2fin=a_x0+a_px*a_lambda;
  double y2fin=a_y0+a_py*a_lambda;
  double z2fin=a_z0+a_pz*a_lambda;
 
  ATH_MSG_VERBOSE ("x1fin " << x1fin << "y1fin " << y1fin << "z1fin " << z1fin);
  ATH_MSG_VERBOSE ("x2fin " << x2fin << "y2fin " << y2fin << "z2fin " << z2fin);
 
  double distance = sqrt((x1fin-x2fin)*(x1fin-x2fin)+
             (y1fin-y2fin)*(y1fin-y2fin)+
             (z1fin-z2fin)*(z1fin-z2fin));
 
  ATH_MSG_DEBUG ("distance " << distance << std::endl 
                 << "fitted dist from primary vertex " <<
                 a_lambda/fabs(a_lambda)*sqrt(std::pow(a_px*a_lambda,2)+
                 std::pow(a_py*a_lambda,2)+std::pow(a_pz*a_lambda,2)) );
 
  distanceOnAxis=a_lambda/fabs(a_lambda)*sqrt(std::pow(a_px*a_lambda,2)+
                          std::pow(a_py*a_lambda,2)+
                          std::pow(a_pz*a_lambda,2));
 
  Amg::Vector3D r1(x1fin,y1fin,z1fin);
  Amg::Vector3D r2(x2fin,y2fin,z2fin);
 
  return std::pair<Amg::Vector3D,double>(r2,distance);//give back position on neutral track... (jet axis)
  
}

inputHandles()

virtual std::vector< Gaudi::DataHandle * > AthCommonDataStore< AthCommonMsg< AlgTool > >::inputHandles ( ) const

overridevirtualinherited

Return this algorithm's input handles.

We override this to include handle instances from key arrays if they have not yet been declared. See comments on updateVHKA.

interfaceID()

const InterfaceID & Trk::TrkDistanceFinderNeutralCharged::interfaceID ( )

inlinestatic

Definition at line 34 of file TrkDistanceFinderNeutralCharged.h.

    {
      return IID_TrkDistanceFinderNeutralCharged;
    };

msg()

MsgStream & AthCommonMsg< AlgTool >::msg ( ) const

inlineinherited

Definition at line 24 of file AthCommonMsg.h.

                                {
    return this->msgStream();
  }

msgLvl()

bool AthCommonMsg< AlgTool >::msgLvl ( const MSG::Level lvl ) const

inlineinherited

Definition at line 30 of file AthCommonMsg.h.

                                               {
    return this->msgLevel(lvl);
  }

outputHandles()

virtual std::vector< Gaudi::DataHandle * > AthCommonDataStore< AthCommonMsg< AlgTool > >::outputHandles ( ) const

overridevirtualinherited

Return this algorithm's output handles.

We override this to include handle instances from key arrays if they have not yet been declared. See comments on updateVHKA.

renounce()

std::enable_if_t< std::is_void_v< std::result_of_t< decltype(&T::renounce)(T)> > &&!std::is_base_of_v< SG::VarHandleKeyArray, T > &&std::is_base_of_v< Gaudi::DataHandle, T >, void > AthCommonDataStore< AthCommonMsg< AlgTool > >::renounce ( T & h )

inlineprotectedinherited

Definition at line 380 of file AthCommonDataStore.h.

  {
    h.renounce();
    PBASE::renounce (h);
  }

renounceArray()

void AthCommonDataStore< AthCommonMsg< AlgTool > >::renounceArray ( SG::VarHandleKeyArray & handlesArray )

inlineprotectedinherited

remove all handles from I/O resolution

Definition at line 364 of file AthCommonDataStore.h.

                                                          {
    handlesArray.renounce();
  }

sysInitialize()

virtual StatusCode AthCommonDataStore< AthCommonMsg< AlgTool > >::sysInitialize ( )

overridevirtualinherited

Perform system initialization for an algorithm.

We override this to declare all the elements of handle key arrays at the end of initialization. See comments on updateVHKA.

Reimplemented in asg::AsgMetadataTool, AthCheckedComponent< AthAlgTool >, AthCheckedComponent<::AthAlgTool >, and DerivationFramework::CfAthAlgTool.

sysStart()

virtual StatusCode AthCommonDataStore< AthCommonMsg< AlgTool > >::sysStart ( )

overridevirtualinherited

Handle START transition.

We override this in order to make sure that conditions handle keys can cache a pointer to the conditions container.

updateVHKA()

void AthCommonDataStore< AthCommonMsg< AlgTool > >::updateVHKA ( Gaudi::Details::PropertyBase & )

inlineinherited

Definition at line 308 of file AthCommonDataStore.h.

                                               {
    // debug() << "updateVHKA for property " << p.name() << " " << p.toString() 
    //         << "  size: " << m_vhka.size() << endmsg;
    for (auto &a : m_vhka) {
      std::vector<SG::VarHandleKey*> keys = a->keys();
      for (auto k : keys) {
        k->setOwner(this);
      }
    }
  }

Member Data Documentation

m_detStore

StoreGateSvc_t AthCommonDataStore< AthCommonMsg< AlgTool > >::m_detStore

privateinherited

Pointer to StoreGate (detector store by default)

Definition at line 393 of file AthCommonDataStore.h.

m_evtStore

StoreGateSvc_t AthCommonDataStore< AthCommonMsg< AlgTool > >::m_evtStore

privateinherited

Pointer to StoreGate (event store by default)

Definition at line 390 of file AthCommonDataStore.h.

m_maxloopnumber

double Trk::TrkDistanceFinderNeutralCharged::m_maxloopnumber

private

Definition at line 43 of file TrkDistanceFinderNeutralCharged.h.

m_precision

double Trk::TrkDistanceFinderNeutralCharged::m_precision

private

Definition at line 42 of file TrkDistanceFinderNeutralCharged.h.

m_varHandleArraysDeclared

bool AthCommonDataStore< AthCommonMsg< AlgTool > >::m_varHandleArraysDeclared

privateinherited

Definition at line 399 of file AthCommonDataStore.h.

m_vhka

std::vector<SG::VarHandleKeyArray*> AthCommonDataStore< AthCommonMsg< AlgTool > >::m_vhka

privateinherited

Definition at line 398 of file AthCommonDataStore.h.

---

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

• TrkDistanceFinderNeutralCharged.h
• TrkDistanceFinderNeutralCharged.cxx