[819] | 1 | // |
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| 2 | // ******************************************************************** |
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| 3 | // * License and Disclaimer * |
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| 4 | // * * |
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| 5 | // * The Geant4 software is copyright of the Copyright Holders of * |
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| 6 | // * the Geant4 Collaboration. It is provided under the terms and * |
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| 7 | // * conditions of the Geant4 Software License, included in the file * |
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| 8 | // * LICENSE and available at http://cern.ch/geant4/license . These * |
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| 9 | // * include a list of copyright holders. * |
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| 10 | // * * |
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| 11 | // * Neither the authors of this software system, nor their employing * |
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| 12 | // * institutes,nor the agencies providing financial support for this * |
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| 13 | // * work make any representation or warranty, express or implied, * |
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| 14 | // * regarding this software system or assume any liability for its * |
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| 15 | // * use. Please see the license in the file LICENSE and URL above * |
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| 16 | // * for the full disclaimer and the limitation of liability. * |
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| 17 | // * * |
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| 18 | // * This code implementation is the result of the scientific and * |
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| 19 | // * technical work of the GEANT4 collaboration. * |
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| 20 | // * By using, copying, modifying or distributing the software (or * |
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| 21 | // * any work based on the software) you agree to acknowledge its * |
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| 22 | // * use in resulting scientific publications, and indicate your * |
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| 23 | // * acceptance of all terms of the Geant4 Software license. * |
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| 24 | // ******************************************************************** |
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| 25 | // |
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| 26 | |
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| 27 | // |
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[963] | 28 | // $Id: G4VDiscreteProcess.hh,v 1.9 2007/11/15 04:10:18 kurasige Exp $ |
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[1228] | 29 | // GEANT4 tag $Name: geant4-09-03 $ |
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[819] | 30 | // |
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| 31 | // |
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| 32 | // ------------------------------------------------------------ |
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| 33 | // GEANT 4 class header file |
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| 34 | // |
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| 35 | // History: first implementation, based on object model of |
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| 36 | // 2nd December 1995, G.Cosmo |
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| 37 | // add G4VDiscreteProcess(const G4String&) 24 Jul 1996, Hisaya kurashige |
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| 38 | // |
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| 39 | // Class Description |
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| 40 | // Abstract class which defines the public behavior of |
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| 41 | // discrete physics interactions. |
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| 42 | // |
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| 43 | // ------------------------------------------------------------ |
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| 44 | // New Physics scheme 18 Dec. 1996 H.Kurahige |
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| 45 | // ------------------------------------------------------------ |
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| 46 | // modified for new ParticleChange 12 Mar. 1998 H.Kurashige |
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| 47 | // Fixed a bug in PostStepGetPhysicalInteractionLength |
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| 48 | // 15 Apr. 2002 H.Kurashige |
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| 49 | // |
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| 50 | |
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| 51 | #ifndef G4VDiscreteProcess_h |
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| 52 | #define G4VDiscreteProcess_h 1 |
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| 53 | |
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| 54 | #include "globals.hh" |
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| 55 | #include "G4ios.hh" |
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| 56 | |
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| 57 | #include "G4VProcess.hh" |
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| 58 | |
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| 59 | class G4VDiscreteProcess : public G4VProcess |
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| 60 | { |
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| 61 | // Abstract class which defines the public behavior of |
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| 62 | // discrete physics interactions. |
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| 63 | public: |
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| 64 | |
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| 65 | G4VDiscreteProcess(const G4String& , |
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| 66 | G4ProcessType aType = fNotDefined ); |
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| 67 | G4VDiscreteProcess(G4VDiscreteProcess &); |
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| 68 | |
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| 69 | virtual ~G4VDiscreteProcess(); |
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| 70 | |
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| 71 | public :// with description |
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| 72 | virtual G4double PostStepGetPhysicalInteractionLength( |
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| 73 | const G4Track& track, |
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| 74 | G4double previousStepSize, |
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| 75 | G4ForceCondition* condition |
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| 76 | ); |
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| 77 | |
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| 78 | virtual G4VParticleChange* PostStepDoIt( |
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| 79 | const G4Track& , |
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| 80 | const G4Step& |
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| 81 | ); |
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| 82 | |
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| 83 | // no operation in AtRestDoIt and AlongStepDoIt |
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| 84 | virtual G4double AlongStepGetPhysicalInteractionLength( |
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| 85 | const G4Track&, |
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| 86 | G4double , |
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| 87 | G4double , |
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| 88 | G4double& , |
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| 89 | G4GPILSelection* |
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| 90 | ){ return -1.0; }; |
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| 91 | |
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| 92 | virtual G4double AtRestGetPhysicalInteractionLength( |
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| 93 | const G4Track& , |
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| 94 | G4ForceCondition* |
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| 95 | ) { return -1.0; }; |
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| 96 | |
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| 97 | // no operation in AtRestDoIt and AlongStepDoIt |
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| 98 | virtual G4VParticleChange* AtRestDoIt( |
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| 99 | const G4Track& , |
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| 100 | const G4Step& |
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| 101 | ) {return 0;}; |
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| 102 | |
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| 103 | virtual G4VParticleChange* AlongStepDoIt( |
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| 104 | const G4Track& , |
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| 105 | const G4Step& |
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| 106 | ) {return 0;}; |
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| 107 | |
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| 108 | protected:// with description |
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| 109 | virtual G4double GetMeanFreePath(const G4Track& aTrack, |
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| 110 | G4double previousStepSize, |
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| 111 | G4ForceCondition* condition |
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| 112 | )=0; |
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| 113 | // Calculates from the macroscopic cross section a mean |
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| 114 | // free path, the value is returned in units of distance. |
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| 115 | |
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| 116 | private: |
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| 117 | // hide default constructor and assignment operator as private |
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| 118 | G4VDiscreteProcess(); |
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| 119 | G4VDiscreteProcess & operator=(const G4VDiscreteProcess &right); |
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| 120 | |
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| 121 | }; |
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| 122 | |
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| 123 | // ----------------------------------------- |
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| 124 | // inlined function members implementation |
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| 125 | // ----------------------------------------- |
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| 126 | #include "G4Step.hh" |
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| 127 | #include "G4Track.hh" |
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| 128 | #include "G4MaterialTable.hh" |
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| 129 | #include "G4VParticleChange.hh" |
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| 130 | |
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| 131 | inline G4double G4VDiscreteProcess::PostStepGetPhysicalInteractionLength( |
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| 132 | const G4Track& track, |
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| 133 | G4double previousStepSize, |
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| 134 | G4ForceCondition* condition |
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| 135 | ) |
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| 136 | { |
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| 137 | if ( (previousStepSize < 0.0) || (theNumberOfInteractionLengthLeft<=0.0)) { |
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| 138 | // beggining of tracking (or just after DoIt of this process) |
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| 139 | ResetNumberOfInteractionLengthLeft(); |
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| 140 | } else if ( previousStepSize > 0.0) { |
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| 141 | // subtract NumberOfInteractionLengthLeft |
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| 142 | SubtractNumberOfInteractionLengthLeft(previousStepSize); |
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| 143 | } else { |
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| 144 | // zero step |
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| 145 | // DO NOTHING |
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| 146 | } |
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| 147 | |
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| 148 | // condition is set to "Not Forced" |
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| 149 | *condition = NotForced; |
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| 150 | |
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| 151 | // get mean free path |
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| 152 | currentInteractionLength = GetMeanFreePath(track, previousStepSize, condition); |
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| 153 | |
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| 154 | G4double value; |
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| 155 | if (currentInteractionLength <DBL_MAX) { |
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| 156 | value = theNumberOfInteractionLengthLeft * currentInteractionLength; |
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| 157 | } else { |
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| 158 | value = DBL_MAX; |
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| 159 | } |
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| 160 | #ifdef G4VERBOSE |
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| 161 | if (verboseLevel>1){ |
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| 162 | G4cout << "G4VDiscreteProcess::PostStepGetPhysicalInteractionLength "; |
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| 163 | G4cout << "[ " << GetProcessName() << "]" <<G4endl; |
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| 164 | track.GetDynamicParticle()->DumpInfo(); |
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| 165 | G4cout << " in Material " << track.GetMaterial()->GetName() <<G4endl; |
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| 166 | G4cout << "InteractionLength= " << value/cm <<"[cm] " <<G4endl; |
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| 167 | } |
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| 168 | #endif |
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| 169 | return value; |
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| 170 | } |
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| 171 | |
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| 172 | inline G4VParticleChange* G4VDiscreteProcess::PostStepDoIt( |
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| 173 | const G4Track& , |
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| 174 | const G4Step& |
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| 175 | ) |
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| 176 | { |
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| 177 | // clear NumberOfInteractionLengthLeft |
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| 178 | ClearNumberOfInteractionLengthLeft(); |
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| 179 | |
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| 180 | return pParticleChange; |
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| 181 | } |
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| 182 | |
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| 183 | |
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| 184 | #endif |
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| 185 | |
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| 186 | |
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| 187 | |
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