BDSIM
BDSIM is a Geant4 extension toolkit for simulation of particle transport in accelerator beamlines.
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Public Member Functions | Protected Member Functions
BDSIntegratorEulerOld Class Referenceabstract

Common functionality for Euler integrators. More...

#include <BDSIntegratorEulerOld.hh>

Inheritance diagram for BDSIntegratorEulerOld:
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Public Member Functions

 BDSIntegratorEulerOld (G4Mag_EqRhs *eqOfMIn)
 
virtual void Stepper (const G4double yIn[], const G4double dydx[], const G4double h, G4double yOut[], G4double yErr[])
 
- Public Member Functions inherited from BDSIntegratorMag
 BDSIntegratorMag (G4Mag_EqRhs *eqOfMIn, G4int nVariablesIn)
 
virtual G4double DistChord () const
 Estimate maximum distance of curved solution and chord.
 
virtual G4int IntegratorOrder () const
 Geant4 requires that the integrator order must be supplied by the derived class.
 
BDSIntegratorMagoperator= (const BDSIntegratorMag &)=delete
 Assignment and copy constructor not implemented nor used.
 
 BDSIntegratorMag (BDSIntegratorMag &)=delete
 Assignment and copy constructor not implemented nor used.
 
- Public Member Functions inherited from BDSIntegratorDrift
void AdvanceDriftMag (const G4double yIn[], const G4double h, G4double yOut[], G4double yErr[]) const
 Error array [6] all 0.
 
void AdvanceDriftMag (const G4double yIn[], const G4ThreeVector &unitMomentum, const G4double h, G4double yOut[], G4double yErr[]) const
 
- Public Member Functions inherited from BDSAuxiliaryNavigator
G4VPhysicalVolume * LocateGlobalPointAndSetup (const G4ThreeVector &point, const G4ThreeVector *direction=nullptr, const G4bool pRelativeSearch=true, const G4bool ignoreDirection=true, G4bool useCurvilinear=true) const
 A wrapper for the underlying static navigator instance located within this class.
 
G4VPhysicalVolume * LocateGlobalPointAndSetup (G4Step const *const step, G4bool useCurvilinear=true) const
 
BDSStep ConvertToLocal (G4Step const *const step, G4bool useCurvilinear=true) const
 
BDSStep ConvertToLocal (const G4ThreeVector &globalPosition, const G4ThreeVector &globalDirection, const G4double stepLength=0, const G4bool useCurvilinear=true, const G4double marginLength=1) const
 
BDSStep ConvertToGlobalStep (const G4ThreeVector &localPosition, const G4ThreeVector &localDirection, const G4bool useCurvilinear=true) const
 
G4ThreeVector ConvertToLocal (const G4double globalPoint[3], const G4bool useCurvilinear=true) const
 
G4ThreeVector ConvertToLocal (const G4ThreeVector &globalPosition, const G4bool useCurvilinear=true) const
 Vector version - see notes above.
 
G4ThreeVector ConvertToLocalNoSetup (const G4ThreeVector &globalPosition, const G4bool useCurvilinear=true) const
 Similar to above function but does NOT initialise the transforms.
 
G4ThreeVector ConvertAxisToLocal (const G4ThreeVector &globalAxis, const G4bool useCurvilinear=true) const
 
G4ThreeVector ConvertAxisToLocal (const G4double globalPoint[3], const G4double globalAxis[3], const G4bool useCurvilinear=true) const
 
G4ThreeVector ConvertAxisToLocal (const G4ThreeVector &globalPoint, const G4ThreeVector &globalAxis, const G4bool useCurvilinear=true) const
 Vector version.
 
G4ThreeVector ConvertAxisToGlobal (const G4ThreeVector &localAxis, const G4bool useCurvilinear=true) const
 
std::pair< G4ThreeVector, G4ThreeVector > ConvertAxisToGlobal (const std::pair< G4ThreeVector, G4ThreeVector > &localAxis, const G4bool useCurvilinear=true) const
 
G4ThreeVector ConvertToGlobal (const G4ThreeVector &localPosition, const G4bool useCurvilinear=true) const
 
G4ThreeVector ConvertAxisToGlobal (const G4ThreeVector &globalPosition, const G4ThreeVector &localAxis, const G4bool useCurvilinear=true) const
 
G4ThreeVector ConvertToGlobal (const G4ThreeVector &globalPosition, const G4ThreeVector &localPosition, const G4bool useCurvilinear=true) const
 
BDSStep GlobalToCurvilinear (const G4double fieldArcLength, const G4ThreeVector &unitField, const G4double angle, const G4ThreeVector &position, const G4ThreeVector &unitMomentum, const G4double h, const G4bool useCurvilinearWorld, const G4double FCof, const G4double tilt=0)
 
BDSStep GlobalToCurvilinear (const G4ThreeVector &position, const G4ThreeVector &unitMomentum, const G4double h, const G4bool useCurvilinearWorld)
 
BDSStep CurvilinearToGlobal (const G4ThreeVector &localPosition, const G4ThreeVector &localMomentum, const G4bool useCurvilinearWorld)
 
BDSStep CurvilinearToGlobal (const G4double fieldArcLength, const G4ThreeVector &unitField, const G4double angle, const G4ThreeVector &CLPosition, const G4ThreeVector &CLMomentum, const G4bool useCurvilinearWorld, const G4double FCof, const G4double tilt=0)
 

Protected Member Functions

virtual void AdvanceHelix (const G4double yIn[], G4double h, G4double yOut[], G4double yErr[])=0
 
void AdvanceChord (const G4double h, G4ThreeVector &localPos, G4ThreeVector &localMom, const G4ThreeVector &localA)
 
- Protected Member Functions inherited from BDSIntegratorMag
void ConvertToGlobal (const G4ThreeVector &localPos, const G4ThreeVector &localMom, G4double yOut[], G4double yErr[], const G4double momScaling=1.0)
 scaling of momentum in case localMom is a unit vector
 
void SetDistChord (G4double distChordIn)
 Setter for distChord to private member.
 

Additional Inherited Members

- Static Public Member Functions inherited from BDSAuxiliaryNavigator
static void AttachWorldVolumeToNavigator (G4VPhysicalVolume *worldPVIn)
 Setup the navigator w.r.t. to a world volume - typically real world.
 
static void AttachWorldVolumeToNavigatorCL (G4VPhysicalVolume *curvilinearWorldPVIn)
 
static void RegisterCurvilinearBridgeWorld (G4VPhysicalVolume *curvilinearBridgeWorldPVIn)
 
static void ResetNavigatorStates ()
 
- Static Public Attributes inherited from BDSIntegratorMag
static G4double thinElementLength = -1
 
static G4double nominalMatrixRelativeMomCut = -1
 
static G4bool currentTrackIsPrimary = false
 
- Protected Attributes inherited from BDSIntegratorMag
G4Mag_EqRhs * eqOfM
 
const G4int nVariables
 Cache of the number of variables.
 
G4MagIntegratorStepper * backupStepper
 
G4bool zeroStrength
 
G4double backupStepperMomLimit
 
- Protected Attributes inherited from BDSAuxiliaryNavigator
G4AffineTransform globalToLocal
 
G4AffineTransform localToGlobal
 
G4AffineTransform globalToLocalCL
 
G4AffineTransform localToGlobalCL
 
G4bool bridgeVolumeWasUsed
 
- Static Protected Attributes inherited from BDSAuxiliaryNavigator
static G4Navigator * auxNavigator = new G4Navigator()
 
static G4Navigator * auxNavigatorCL = new G4Navigator()
 
static G4Navigator * auxNavigatorCLB = new G4Navigator()
 

Detailed Description

Common functionality for Euler integrators.

Author
Laurie Nevay

Definition at line 34 of file BDSIntegratorEulerOld.hh.

Constructor & Destructor Documentation

◆ BDSIntegratorEulerOld()

BDSIntegratorEulerOld::BDSIntegratorEulerOld ( G4Mag_EqRhs *  eqOfMIn)
explicit

Definition at line 30 of file BDSIntegratorEulerOld.cc.

◆ ~BDSIntegratorEulerOld()

virtual BDSIntegratorEulerOld::~BDSIntegratorEulerOld ( )
inlinevirtual

Definition at line 38 of file BDSIntegratorEulerOld.hh.

Member Function Documentation

◆ AdvanceChord()

void BDSIntegratorEulerOld::AdvanceChord ( const G4double  h,
G4ThreeVector &  localPos,
G4ThreeVector &  localMom,
const G4ThreeVector &  localA 
)
protected

Advance chord by quadratic approximation. Can throw a std::out_of_range exception for inappropriate use of paraxial approximation.

Definition at line 86 of file BDSIntegratorEulerOld.cc.

References BDS::IsFiniteStrength(), and BDSIntegratorMag::SetDistChord().

Referenced by BDSIntegratorDecapole::AdvanceHelix(), BDSIntegratorOctupole::AdvanceHelix(), and BDSIntegratorSextupole::AdvanceHelix().

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◆ AdvanceHelix()

virtual void BDSIntegratorEulerOld::AdvanceHelix ( const G4double  yIn[],
G4double  h,
G4double  yOut[],
G4double  yErr[] 
)
protectedpure virtual

Expected method in derived class to calculate the output coordinates for given input coordinates along step length h.

Implemented in BDSIntegratorDecapole, BDSIntegratorOctupole, and BDSIntegratorSextupole.

Referenced by Stepper().

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◆ Stepper()

void BDSIntegratorEulerOld::Stepper ( const G4double  yIn[],
const G4double  dydx[],
const G4double  h,
G4double  yOut[],
G4double  yErr[] 
)
virtual

Call AdvanceHelix pure virtual function. If the local unit momentum z component is less than 0.9 or the absolute magnitude of the momentum is < 40MeV, use the backup stepper. Otherwise compare a single full step and two half steps for the error calculation. Use the value of two half steps as the output coordinates.

Definition at line 34 of file BDSIntegratorEulerOld.cc.

References BDSIntegratorDrift::AdvanceDriftMag(), AdvanceHelix(), BDSAuxiliaryNavigator::auxNavigator, BDSIntegratorMag::backupStepper, BDSIntegratorMag::eqOfM, BDS::IsFinite(), BDSIntegratorMag::nVariables, BDSIntegratorMag::SetDistChord(), and BDSIntegratorMag::zeroStrength.

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