G4ErrorFreeTrajParam Class Reference

#include <G4ErrorFreeTrajParam.hh>

Public Member Functions
	G4ErrorFreeTrajParam ()
	G4ErrorFreeTrajParam (const G4Point3D &pos, const G4Vector3D &mom)
virtual	~G4ErrorFreeTrajParam ()
void	Update (const G4Track *aTrack)
void	SetParameters (const G4Point3D &pos, const G4Vector3D &mom)
G4Vector3D	GetDirection () const
G4double	GetInvP () const
G4double	GetLambda () const
G4double	GetPhi () const
G4double	GetYPerp () const
G4double	GetZPerp () const

Friends
std::ostream &	operator<< (std::ostream &, const G4ErrorFreeTrajParam &ts)

Detailed Description

Definition at line 49 of file G4ErrorFreeTrajParam.hh.

Constructor & Destructor Documentation

G4ErrorFreeTrajParam::G4ErrorFreeTrajParam ( )

inline

Definition at line 53 of file G4ErrorFreeTrajParam.hh.

   : fInvP(0.), fLambda(0.), fPhi(0.), fYPerp(0.), fZPerp(0.){}

G4ErrorFreeTrajParam::G4ErrorFreeTrajParam	(	const G4Point3D &	pos,
		const G4Vector3D &	mom
	)

Definition at line 40 of file G4ErrorFreeTrajParam.cc.

References SetParameters().

{
  SetParameters( pos, mom );
}

virtual G4ErrorFreeTrajParam::~G4ErrorFreeTrajParam ( )

inlinevirtual

Definition at line 58 of file G4ErrorFreeTrajParam.hh.

{}

Member Function Documentation

G4Vector3D G4ErrorFreeTrajParam::GetDirection ( ) const

inline

Definition at line 70 of file G4ErrorFreeTrajParam.hh.

Referenced by G4ErrorFreeTrajState::G4ErrorFreeTrajState().

{ return fDir;}

G4double G4ErrorFreeTrajParam::GetInvP ( ) const

inline

Definition at line 72 of file G4ErrorFreeTrajParam.hh.

{ return fInvP; }

G4double G4ErrorFreeTrajParam::GetLambda ( ) const

inline

Definition at line 73 of file G4ErrorFreeTrajParam.hh.

Referenced by G4ErrorSurfaceTrajState::BuildErrorMatrix(), and G4ErrorFreeTrajState::G4ErrorFreeTrajState().

{ return fLambda; }

G4double G4ErrorFreeTrajParam::GetPhi ( ) const

inline

Definition at line 74 of file G4ErrorFreeTrajParam.hh.

Referenced by G4ErrorSurfaceTrajState::BuildErrorMatrix(), and G4ErrorFreeTrajState::G4ErrorFreeTrajState().

{ return fPhi; }

G4double G4ErrorFreeTrajParam::GetYPerp ( ) const

inline

Definition at line 75 of file G4ErrorFreeTrajParam.hh.

{ return fYPerp; }

G4double G4ErrorFreeTrajParam::GetZPerp ( ) const

inline

Definition at line 76 of file G4ErrorFreeTrajParam.hh.

{ return fZPerp; }

void G4ErrorFreeTrajParam::SetParameters	(	const G4Point3D &	pos,
		const G4Vector3D &	mom
	)

Definition at line 48 of file G4ErrorFreeTrajParam.cc.

References HepGeom::BasicVector3D< T >::cross(), python.hepunit::deg, CLHEP::Hep3Vector::dot(), HepGeom::BasicVector3D< T >::mag(), HepGeom::BasicVector3D< T >::phi(), HepGeom::BasicVector3D< T >::theta(), HepGeom::BasicVector3D< T >::x(), and HepGeom::BasicVector3D< T >::y().

Referenced by G4ErrorFreeTrajParam(), G4ErrorFreeTrajState::SetParameters(), and Update().

{
  fInvP = 1./mom.mag();
  fDir = mom*fInvP;
  fLambda = 90.*deg - mom.theta();
  fPhi = mom.phi();
  G4Vector3D vxPerp(0.,0.,0.);
  if( mom.mag() > 0.) {
    vxPerp = mom/mom.mag();
  }
  G4Vector3D vyPerp = G4Vector3D( -vxPerp.y(), vxPerp.x(), 0.);
  vyPerp /= vyPerp.mag();
  G4Vector3D vzPerp = vxPerp.cross( vyPerp );
  vzPerp /= vzPerp.mag();
  // check if right handed
  //  fXPerp = pos.proj( mom );
  G4ThreeVector posv(pos);
  if( vyPerp.mag() != 0. ) {
    // now all 2 scalar memeber variables retain the signs
    //  fYPerp = posv.project( vyPerp ).mag();
    //  fZPerp = posv.project( vzPerp ).mag();
    fYPerp = posv.dot( vyPerp );
    fZPerp = posv.dot( vzPerp );
  } else {
    fYPerp = 0.;
    fZPerp = 0.;
  }
}

void G4ErrorFreeTrajParam::Update

(

const G4Track *

aTrack

)

Definition at line 79 of file G4ErrorFreeTrajParam.cc.

References G4Track::GetMomentum(), G4Track::GetPosition(), and SetParameters().

Referenced by G4ErrorFreeTrajState::Update().

{
  SetParameters( aTrack->GetPosition(), aTrack->GetMomentum() );

}

Friends And Related Function Documentation

std::ostream& operator<< ( std::ostream &  out, const G4ErrorFreeTrajParam &  ts  )

friend

Definition at line 87 of file G4ErrorFreeTrajParam.cc.

{
  G4int oldprc = out.precision(8);
  out << " InvP= " << tp.fInvP << " Theta= "
      << tp.fLambda << " Phi= " << tp.fPhi << " YPerp= " << tp.fYPerp
      << " ZPerp= " << tp.fZPerp << G4endl;
  out << " momentum direction= " << tp.fDir << G4endl;
  out.precision(oldprc);
    
  return out;
}

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

• G4ErrorFreeTrajParam.hh
• G4ErrorFreeTrajParam.cc