G4CachedMagneticField Class Reference

#include <G4CachedMagneticField.hh>

Inheritance diagram for G4CachedMagneticField:

Collaboration diagram for G4CachedMagneticField:

Public Member Functions
	G4CachedMagneticField (G4MagneticField *, G4double distanceConst)
virtual	~G4CachedMagneticField ()
	G4CachedMagneticField (const G4CachedMagneticField &r)
G4CachedMagneticField &	operator= (const G4CachedMagneticField &p)
virtual void	GetFieldValue (const G4double Point[4], G4double *Bfield) const
G4double	GetConstDistance () const
void	SetConstDistance (G4double dist)
G4int	GetCountCalls () const
G4int	GetCountEvaluations () const
void	ClearCounts ()
void	ReportStatistics ()
virtual G4Field *	Clone () const
Public Member Functions inherited from G4MagneticField
	G4MagneticField ()
virtual	~G4MagneticField ()
	G4MagneticField (const G4MagneticField &r)
G4MagneticField &	operator= (const G4MagneticField &p)
G4bool	DoesFieldChangeEnergy () const
Public Member Functions inherited from G4ElectroMagneticField
	G4ElectroMagneticField ()
virtual	~G4ElectroMagneticField ()
	G4ElectroMagneticField (const G4ElectroMagneticField &r)
G4ElectroMagneticField &	operator= (const G4ElectroMagneticField &p)
Public Member Functions inherited from G4Field
	G4Field (G4bool gravityOn=false)
	G4Field (const G4Field &)
virtual	~G4Field ()
G4Field &	operator= (const G4Field &p)
G4bool	IsGravityActive () const
void	SetGravityActive (G4bool OnOffFlag)

Protected Attributes
G4int	fCountCalls
G4int	fCountEvaluations

Detailed Description

Definition at line 47 of file G4CachedMagneticField.hh.

Constructor & Destructor Documentation

G4CachedMagneticField::G4CachedMagneticField	(	G4MagneticField *	pMagField,
		G4double	distanceConst
	)

Definition at line 33 of file G4CachedMagneticField.cc.

  : G4MagneticField(), 
    fLastLocation(DBL_MAX,DBL_MAX,DBL_MAX),
    fLastValue(DBL_MAX,DBL_MAX,DBL_MAX),
    fCountCalls(0),  fCountEvaluations(0)
{
  fpMagneticField= pMagField;
  fDistanceConst= distance;

  // G4cout << " Cached-B-Field constructor> Distance = " << distance << G4endl;
  this->ClearCounts(); 
}

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G4CachedMagneticField::~G4CachedMagneticField ( )

virtual

Definition at line 58 of file G4CachedMagneticField.cc.

{
}

G4CachedMagneticField::G4CachedMagneticField

(

const G4CachedMagneticField &

r

)

Definition at line 70 of file G4CachedMagneticField.cc.

  : G4MagneticField(rightCMF)
{
  fpMagneticField= rightCMF.fpMagneticField;  // NOTE: sharing pointer here!
  fDistanceConst = rightCMF.fDistanceConst;
  fLastLocation  = rightCMF.fLastLocation;
  fLastValue     = rightCMF.fLastValue;
  this->ClearCounts(); 
}

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Member Function Documentation

void G4CachedMagneticField::ClearCounts ( )

inline

Definition at line 67 of file G4CachedMagneticField.hh.

{ fCountCalls = 0; fCountEvaluations=0; }

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G4Field * G4CachedMagneticField::Clone ( ) const

virtual

Reimplemented from G4Field.

Definition at line 47 of file G4CachedMagneticField.cc.

{
  // Cannot use copy constructor: I need to clone the associated magnetic field
  G4MagneticField* aF = static_cast<G4MagneticField*>(fpMagneticField->Clone());
  G4CachedMagneticField* cloned = new G4CachedMagneticField(aF, fDistanceConst);

  cloned->fLastLocation = fLastLocation;
  cloned->fLastValue = fLastValue;
  return cloned;
}

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G4double G4CachedMagneticField::GetConstDistance ( ) const

inline

Definition at line 62 of file G4CachedMagneticField.hh.

{ return fDistanceConst; } 

G4int G4CachedMagneticField::GetCountCalls ( ) const

inline

Definition at line 65 of file G4CachedMagneticField.hh.

{ return fCountCalls; }

G4int G4CachedMagneticField::GetCountEvaluations ( ) const

inline

Definition at line 66 of file G4CachedMagneticField.hh.

{ return fCountEvaluations; } 

void G4CachedMagneticField::GetFieldValue ( const G4double  Point[4], G4double *  Bfield  ) const

virtual

Implements G4MagneticField.

Definition at line 93 of file G4CachedMagneticField.cc.

{
  G4ThreeVector newLocation( Point[0], Point[1], Point[2] );

  // G4cout << "Cache-B-field called at " << newLocation << G4endl;

  G4double      distSq= (newLocation-fLastLocation).mag2();
  fCountCalls++;
  if( distSq < fDistanceConst*fDistanceConst ) { 
     Bfield[0] = fLastValue.x();
     Bfield[1] = fLastValue.y();
     Bfield[2] = fLastValue.z();
  }else{
     // G4CachedMagneticField* thisNonC= const_cast<G4CachedMagneticField*>(this);
     fpMagneticField->GetFieldValue( Point, Bfield );
     // G4cout << " Evaluating. " << G4endl;
     fCountEvaluations++;
     // thisNonC->
     fLastLocation= G4ThreeVector( Point[0],  Point[1],  Point[2] );
     // thisNonC->
     fLastValue=    G4ThreeVector( Bfield[0], Bfield[1], Bfield[2] );
  }
}

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G4CachedMagneticField & G4CachedMagneticField::operator=

(

const G4CachedMagneticField &

p

)

Definition at line 80 of file G4CachedMagneticField.cc.

{
  if (&p == this) return *this;
  G4MagneticField::operator=(p);
  fpMagneticField= p.fpMagneticField;  // NOTE: sharing pointer here!
  fDistanceConst = p.fDistanceConst;
  fLastLocation  = p.fLastLocation;
  fLastValue     = p.fLastValue;
  this->ClearCounts(); 
  return *this;
}

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void G4CachedMagneticField::ReportStatistics

(

)

Definition at line 63 of file G4CachedMagneticField.cc.

{
  G4cout << " Cached field: " << G4endl
     << "   Number of calls:        " << fCountCalls << G4endl
     << "   Number of evaluations : " << fCountEvaluations << G4endl;                     
}

void G4CachedMagneticField::SetConstDistance ( G4double  dist )

inline

Definition at line 63 of file G4CachedMagneticField.hh.

{ fDistanceConst= dist;}

Member Data Documentation

G4int G4CachedMagneticField::fCountCalls

mutableprotected

Definition at line 81 of file G4CachedMagneticField.hh.

G4int G4CachedMagneticField::fCountEvaluations

mutableprotected

Definition at line 81 of file G4CachedMagneticField.hh.

---

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

• source/geant4.10.03.p02/source/geometry/magneticfield/include/G4CachedMagneticField.hh
• source/geant4.10.03.p02/source/geometry/magneticfield/src/G4CachedMagneticField.cc