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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 : G4MagneticField(), 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 G4MagneticField* aF = static_cast<G4MagneticField*>(fpMagneticField->Clone());
46 auto cloned = new G4CachedMagneticField(aF, << 46 G4CachedMagneticField* 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()
>> 54 {
>> 55 }
54 56
55 void 57 void
56 G4CachedMagneticField::ReportStatistics() 58 G4CachedMagneticField::ReportStatistics()
57 { 59 {
58 G4cout << " Cached field: " << G4endl 60 G4cout << " Cached field: " << G4endl
59 << " Number of calls: " << f 61 << " Number of calls: " << fCountCalls << G4endl
60 << " Number of evaluations : " << f 62 << " Number of evaluations : " << fCountEvaluations << G4endl;
61 } 63 }
62 64
63 G4CachedMagneticField:: 65 G4CachedMagneticField::
64 G4CachedMagneticField(const G4CachedMagneticFi 66 G4CachedMagneticField(const G4CachedMagneticField& rightCMF)
65 : G4MagneticField(rightCMF) 67 : G4MagneticField(rightCMF)
66 { 68 {
67 fpMagneticField= rightCMF.fpMagneticField; 69 fpMagneticField= rightCMF.fpMagneticField; // NOTE: sharing pointer here!
68 fDistanceConst = rightCMF.fDistanceConst; 70 fDistanceConst = rightCMF.fDistanceConst;
69 fLastLocation = rightCMF.fLastLocation; 71 fLastLocation = rightCMF.fLastLocation;
70 fLastValue = rightCMF.fLastValue; 72 fLastValue = rightCMF.fLastValue;
71 ClearCounts(); 73 ClearCounts();
72 } 74 }
73 75
74 G4CachedMagneticField& 76 G4CachedMagneticField&
75 G4CachedMagneticField::operator = (const G4Cac 77 G4CachedMagneticField::operator = (const G4CachedMagneticField& p)
76 { 78 {
77 if (&p == this) { return *this; } 79 if (&p == this) { return *this; }
78 G4MagneticField::operator=(p); 80 G4MagneticField::operator=(p);
79 fpMagneticField= p.fpMagneticField; // NOTE 81 fpMagneticField= p.fpMagneticField; // NOTE: sharing pointer here!
80 fDistanceConst = p.fDistanceConst; 82 fDistanceConst = p.fDistanceConst;
81 fLastLocation = p.fLastLocation; 83 fLastLocation = p.fLastLocation;
82 fLastValue = p.fLastValue; 84 fLastValue = p.fLastValue;
83 ClearCounts(); 85 ClearCounts();
84 return *this; 86 return *this;
85 } 87 }
86 88
87 void 89 void
88 G4CachedMagneticField::GetFieldValue( const G4 90 G4CachedMagneticField::GetFieldValue( const G4double Point[4],
89 G4 91 G4double* Bfield ) const
90 { 92 {
91 G4ThreeVector newLocation( Point[0], Point[1 93 G4ThreeVector newLocation( Point[0], Point[1], Point[2] );
92 94
93 G4double distSq= (newLocation-fLastLoca 95 G4double distSq= (newLocation-fLastLocation).mag2();
94 ++fCountCalls; 96 ++fCountCalls;
95 if( distSq < fDistanceConst*fDistanceConst ) 97 if( distSq < fDistanceConst*fDistanceConst )
96 { 98 {
97 Bfield[0] = fLastValue.x(); 99 Bfield[0] = fLastValue.x();
98 Bfield[1] = fLastValue.y(); 100 Bfield[1] = fLastValue.y();
99 Bfield[2] = fLastValue.z(); 101 Bfield[2] = fLastValue.z();
100 } 102 }
101 else 103 else
102 { 104 {
103 fpMagneticField->GetFieldValue( Point, Bf 105 fpMagneticField->GetFieldValue( Point, Bfield );
104 ++fCountEvaluations; 106 ++fCountEvaluations;
105 fLastLocation = G4ThreeVector( Point[0], 107 fLastLocation = G4ThreeVector( Point[0], Point[1], Point[2] );
106 fLastValue = G4ThreeVector( Bfield[0], 108 fLastValue = G4ThreeVector( Bfield[0], Bfield[1], Bfield[2] );
107 } 109 }
108 } 110 }
109 111