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25 //
26 /*
27 * =============================================================================
28 *
29 * Filename: CexmcPhysicsList.hh
30 *
31 * Description: mandatory physics list
32 *
33 * Version: 1.0
34 * Created: 11.10.2009 14:51:08
35 * Revision: none
36 * Compiler: gcc
37 *
38 * Author: Alexey Radkov (),
39 * Company: PNPI
40 *
41 * =============================================================================
42 */
43
44 #ifndef CEXMC_PHYSICS_LIST_HH
45 #define CEXMC_PHYSICS_LIST_HH
46
47 #include <Randomize.hh>
48 #include <G4Track.hh>
49 #include <G4StepPoint.hh>
50 #include <G4ThreeVector.hh>
51 #include <G4AffineTransform.hh>
52 #include "CexmcPhysicsManager.hh"
53 #include "CexmcProductionModel.hh"
54 #include "CexmcIncidentParticleTrackInfo.hh"
55 #include "CexmcSetup.hh"
56 #include "CexmcException.hh"
57 #include "CexmcCommon.hh"
58
59
60 template < typename BasePhysics, template < typename > class StudiedPhysics,
61 typename ProductionModel >
62 class CexmcPhysicsList : public BasePhysics, public CexmcPhysicsManager
63 {
64 public:
65 CexmcPhysicsList();
66
67 public:
68 CexmcProductionModel * GetProductionModel( void );
69
70 G4bool IsStudiedProcessAllowed( void ) const;
71
72 void ResampleTrackLengthInTarget( const G4Track * track,
73 const G4StepPoint * stepPoint );
74
75 void SetupConstructionHook( const CexmcSetup * setup );
76
77 protected:
78 void CalculateBasicMaxIL( const G4ThreeVector & direction );
79
80 private:
81 StudiedPhysics< ProductionModel > * studiedPhysics;
82
83 G4VSolid * targetSolid;
84
85 G4AffineTransform targetTransform;
86 };
87
88
89 template < typename BasePhysics, template < typename > class StudiedPhysics,
90 typename ProductionModel >
91 CexmcPhysicsList< BasePhysics, StudiedPhysics, ProductionModel >::
92 CexmcPhysicsList() : studiedPhysics( NULL ), targetSolid( NULL )
93 {
94 studiedPhysics = new StudiedPhysics< ProductionModel >( this );
95 this->RegisterPhysics( studiedPhysics );
96 }
97
98
99 template < typename BasePhysics, template < typename > class StudiedPhysics,
100 typename ProductionModel >
101 CexmcProductionModel *
102 CexmcPhysicsList< BasePhysics, StudiedPhysics, ProductionModel >::
103 GetProductionModel( void )
104 {
105 return studiedPhysics->GetProductionModel();
106 }
107
108
109 template < typename BasePhysics, template < typename > class StudiedPhysics,
110 typename ProductionModel >
111 G4bool CexmcPhysicsList< BasePhysics, StudiedPhysics, ProductionModel >::
112 IsStudiedProcessAllowed( void ) const
113 {
114 return numberOfTriggeredStudiedInteractions == 0;
115 }
116
117
118 template < typename BasePhysics, template < typename > class StudiedPhysics,
119 typename ProductionModel >
120 void CexmcPhysicsList< BasePhysics, StudiedPhysics, ProductionModel >::
121 ResampleTrackLengthInTarget( const G4Track * track,
122 const G4StepPoint * stepPoint )
123 {
124 /* BEWARE: all callers must ensure that:
125 * 1) track (or stepPoint if not NULL) is inside target volume:
126 * in this case we can use already calculated targetTransform
127 * 2) track info object is of type CexmcIncidentParticleTrackInfo*:
128 * in this case we can use static_cast<> for trackInfo */
129 CexmcIncidentParticleTrackInfo * trackInfo(
130 static_cast< CexmcIncidentParticleTrackInfo * >(
131 track->GetUserInformation() ) );
132
133 if ( ! trackInfo )
134 return;
135
136 G4ThreeVector position;
137 G4ThreeVector direction;
138
139 if ( stepPoint )
140 {
141 position = targetTransform.TransformPoint( stepPoint->GetPosition() );
142 direction = targetTransform.TransformAxis(
143 stepPoint->GetMomentumDirection() );
144 }
145 else
146 {
147 position = targetTransform.TransformPoint( track->GetPosition() );
148 direction = targetTransform.TransformAxis(
149 track->GetMomentumDirection() );
150 }
151
152 G4double distanceInTarget( targetSolid->DistanceToOut( position,
153 direction ) );
154 trackInfo->ResetCurrentTrackLengthInTarget();
155 trackInfo->SetFinalTrackLengthInTarget( G4UniformRand() *
156 std::max( distanceInTarget, proposedMaxIL ) );
157 trackInfo->SetNeedsTrackLengthResampling( false );
158 }
159
160
161 template < typename BasePhysics, template < typename > class StudiedPhysics,
162 typename ProductionModel >
163 void CexmcPhysicsList< BasePhysics, StudiedPhysics, ProductionModel >::
164 CalculateBasicMaxIL( const G4ThreeVector & direction )
165 {
166 /* basicMaxIL is double distance from the point (0, 0, 0) to the edge of the
167 * target solid along the specified direction */
168 basicMaxIL = targetSolid->DistanceToOut( G4ThreeVector(),
169 targetTransform.TransformAxis( direction ) ) * 2;
170 }
171
172
173 template < typename BasePhysics, template < typename > class StudiedPhysics,
174 typename ProductionModel >
175 void CexmcPhysicsList< BasePhysics, StudiedPhysics, ProductionModel >::
176 SetupConstructionHook( const CexmcSetup * setup )
177 {
178 targetSolid = setup->GetVolume( CexmcSetup::Target )->GetSolid();
179 targetTransform = setup->GetTargetTransform().Inverse();
180 }
181
182
183 #endif
184
185