Geant4  10.02.p02
G4CachedMagneticField.cc
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27 // $Id: G4CachedMagneticField.cc 97486 2016-06-03 10:45:04Z gcosmo $
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30 
31 #include "G4CachedMagneticField.hh"
32 
34  G4double distance)
35  : G4MagneticField(),
36  fLastLocation(DBL_MAX,DBL_MAX,DBL_MAX),
37  fLastValue(DBL_MAX,DBL_MAX,DBL_MAX),
38  fCountCalls(0), fCountEvaluations(0)
39 {
40  fpMagneticField= pMagField;
41  fDistanceConst= distance;
42 
43  // G4cout << " Cached-B-Field constructor> Distance = " << distance << G4endl;
44  this->ClearCounts();
45 }
46 
48 {
49  // Cannot use copy constructor: I need to clone the associated magnetic field
50  G4MagneticField* aF = static_cast<G4MagneticField*>(fpMagneticField->Clone());
52 
53  cloned->fLastLocation = fLastLocation;
54  cloned->fLastValue = fLastValue;
55  return cloned;
56 }
57 
59 {
60 }
61 
62 void
64 {
65  G4cout << " Cached field: " << G4endl
66  << " Number of calls: " << fCountCalls << G4endl
67  << " Number of evaluations : " << fCountEvaluations << G4endl;
68 }
69 
71  : G4MagneticField(rightCMF)
72 {
73  fpMagneticField= rightCMF.fpMagneticField; // NOTE: sharing pointer here!
74  fDistanceConst = rightCMF.fDistanceConst;
75  fLastLocation = rightCMF.fLastLocation;
76  fLastValue = rightCMF.fLastValue;
77  this->ClearCounts();
78 }
79 
81 {
82  if (&p == this) return *this;
84  fpMagneticField= p.fpMagneticField; // NOTE: sharing pointer here!
88  this->ClearCounts();
89  return *this;
90 }
91 
92 void
94  G4double *Bfield ) const
95 {
96  G4ThreeVector newLocation( Point[0], Point[1], Point[2] );
97 
98  // G4cout << "Cache-B-field called at " << newLocation << G4endl;
99 
100  G4double distSq= (newLocation-fLastLocation).mag2();
101  fCountCalls++;
102  if( distSq < fDistanceConst*fDistanceConst ) {
103  Bfield[0] = fLastValue.x();
104  Bfield[1] = fLastValue.y();
105  Bfield[2] = fLastValue.z();
106  }else{
107  // G4CachedMagneticField* thisNonC= const_cast<G4CachedMagneticField*>(this);
108  fpMagneticField->GetFieldValue( Point, Bfield );
109  // G4cout << " Evaluating. " << G4endl;
111  // thisNonC->
112  fLastLocation= G4ThreeVector( Point[0], Point[1], Point[2] );
113  // thisNonC->
114  fLastValue= G4ThreeVector( Bfield[0], Bfield[1], Bfield[2] );
115  }
116 }
G4MagneticField * fpMagneticField
virtual void GetFieldValue(const G4double Point[4], G4double *Bfield) const
CLHEP::Hep3Vector G4ThreeVector
virtual G4Field * Clone() const
virtual void GetFieldValue(const G4double Point[4], G4double *Bfield) const =0
virtual G4Field * Clone() const
Definition: G4Field.cc:54
G4GLOB_DLL std::ostream G4cout
G4CachedMagneticField(G4MagneticField *, G4double distanceConst)
G4MagneticField & operator=(const G4MagneticField &p)
#define G4endl
Definition: G4ios.hh:61
G4CachedMagneticField & operator=(const G4CachedMagneticField &p)
double G4double
Definition: G4Types.hh:76
#define DBL_MAX
Definition: templates.hh:83