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25 // 25 //
26 // G4CachedMagneticField implementation 26 // G4CachedMagneticField implementation
27 // 27 //
28 // Author: J.Apostolakis, 20 July 2009. 28 // Author: J.Apostolakis, 20 July 2009.
29 // ------------------------------------------- 29 // --------------------------------------------------------------------
30 30
31 #include "G4CachedMagneticField.hh" 31 #include "G4CachedMagneticField.hh"
32 32
33 G4CachedMagneticField::G4CachedMagneticField(G 33 G4CachedMagneticField::G4CachedMagneticField(G4MagneticField* pMagField,
34 G 34 G4double distance)
35 : fpMagneticField(pMagField), fDistanceConst 35 : fpMagneticField(pMagField), fDistanceConst(distance),
36 fLastLocation(DBL_MAX,DBL_MAX,DBL_MAX), fL 36 fLastLocation(DBL_MAX,DBL_MAX,DBL_MAX), fLastValue(DBL_MAX,DBL_MAX,DBL_MAX)
37 { 37 {
38 ClearCounts(); 38 ClearCounts();
39 } 39 }
40 40
41 G4Field* G4CachedMagneticField::Clone() const 41 G4Field* G4CachedMagneticField::Clone() const
42 { 42 {
43 // Cannot use copy constructor: need to clon 43 // Cannot use copy constructor: need to clone the associated magnetic field
44 44
45 auto aF = static_cast<G4MagneticField*>(fpM 45 auto aF = static_cast<G4MagneticField*>(fpMagneticField->Clone());
46 auto cloned = new G4CachedMagneticField(aF, 46 auto cloned = new G4CachedMagneticField(aF, fDistanceConst);
47 47
48 cloned->fLastLocation = fLastLocation; 48 cloned->fLastLocation = fLastLocation;
49 cloned->fLastValue = fLastValue; 49 cloned->fLastValue = fLastValue;
50 return cloned; 50 return cloned;
51 } 51 }
52 52
53 G4CachedMagneticField::~G4CachedMagneticField( 53 G4CachedMagneticField::~G4CachedMagneticField() = default;
54 54
55 void 55 void
56 G4CachedMagneticField::ReportStatistics() 56 G4CachedMagneticField::ReportStatistics()
57 { 57 {
58 G4cout << " Cached field: " << G4endl 58 G4cout << " Cached field: " << G4endl
59 << " Number of calls: " << f 59 << " Number of calls: " << fCountCalls << G4endl
60 << " Number of evaluations : " << f 60 << " Number of evaluations : " << fCountEvaluations << G4endl;
61 } 61 }
62 62
63 G4CachedMagneticField:: 63 G4CachedMagneticField::
64 G4CachedMagneticField(const G4CachedMagneticFi 64 G4CachedMagneticField(const G4CachedMagneticField& rightCMF)
65 : G4MagneticField(rightCMF) 65 : G4MagneticField(rightCMF)
66 { 66 {
67 fpMagneticField= rightCMF.fpMagneticField; 67 fpMagneticField= rightCMF.fpMagneticField; // NOTE: sharing pointer here!
68 fDistanceConst = rightCMF.fDistanceConst; 68 fDistanceConst = rightCMF.fDistanceConst;
69 fLastLocation = rightCMF.fLastLocation; 69 fLastLocation = rightCMF.fLastLocation;
70 fLastValue = rightCMF.fLastValue; 70 fLastValue = rightCMF.fLastValue;
71 ClearCounts(); 71 ClearCounts();
72 } 72 }
73 73
74 G4CachedMagneticField& 74 G4CachedMagneticField&
75 G4CachedMagneticField::operator = (const G4Cac 75 G4CachedMagneticField::operator = (const G4CachedMagneticField& p)
76 { 76 {
77 if (&p == this) { return *this; } 77 if (&p == this) { return *this; }
78 G4MagneticField::operator=(p); 78 G4MagneticField::operator=(p);
79 fpMagneticField= p.fpMagneticField; // NOTE 79 fpMagneticField= p.fpMagneticField; // NOTE: sharing pointer here!
80 fDistanceConst = p.fDistanceConst; 80 fDistanceConst = p.fDistanceConst;
81 fLastLocation = p.fLastLocation; 81 fLastLocation = p.fLastLocation;
82 fLastValue = p.fLastValue; 82 fLastValue = p.fLastValue;
83 ClearCounts(); 83 ClearCounts();
84 return *this; 84 return *this;
85 } 85 }
86 86
87 void 87 void
88 G4CachedMagneticField::GetFieldValue( const G4 88 G4CachedMagneticField::GetFieldValue( const G4double Point[4],
89 G4 89 G4double* Bfield ) const
90 { 90 {
91 G4ThreeVector newLocation( Point[0], Point[1 91 G4ThreeVector newLocation( Point[0], Point[1], Point[2] );
92 92
93 G4double distSq= (newLocation-fLastLoca 93 G4double distSq= (newLocation-fLastLocation).mag2();
94 ++fCountCalls; 94 ++fCountCalls;
95 if( distSq < fDistanceConst*fDistanceConst ) 95 if( distSq < fDistanceConst*fDistanceConst )
96 { 96 {
97 Bfield[0] = fLastValue.x(); 97 Bfield[0] = fLastValue.x();
98 Bfield[1] = fLastValue.y(); 98 Bfield[1] = fLastValue.y();
99 Bfield[2] = fLastValue.z(); 99 Bfield[2] = fLastValue.z();
100 } 100 }
101 else 101 else
102 { 102 {
103 fpMagneticField->GetFieldValue( Point, Bf 103 fpMagneticField->GetFieldValue( Point, Bfield );
104 ++fCountEvaluations; 104 ++fCountEvaluations;
105 fLastLocation = G4ThreeVector( Point[0], 105 fLastLocation = G4ThreeVector( Point[0], Point[1], Point[2] );
106 fLastValue = G4ThreeVector( Bfield[0], 106 fLastValue = G4ThreeVector( Bfield[0], Bfield[1], Bfield[2] );
107 } 107 }
108 } 108 }
109 109