Par01/src/Par01PiModel.cc

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0025 //
0026 /// \file Par01PiModel.cc
0027 /// \brief Implementation of the Par01PiModel class
0028
0029 #include "Par01PiModel.hh"
0030
0031 #include "G4Gamma.hh"
0032 #include "G4PionMinus.hh"
0033 #include "G4PionPlus.hh"
0034
0035 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0036
0037 Par01PiModel::Par01PiModel(G4Region* anEnvelope)
0038   : G4VFastSimulationModel("Par01PiModel", anEnvelope)
0039 {
0040   ;
0041 }
0042
0043 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0044
0045 Par01PiModel::~Par01PiModel()
0046 {
0047   ;
0048 }
0049
0050 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0051
0052 G4bool Par01PiModel::IsApplicable(const G4ParticleDefinition& particleType)
0053 {
0054   return &particleType == G4PionMinus::PionMinusDefinition()
0055          || &particleType == G4PionPlus::PionPlusDefinition();
0056 }
0057
0058 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0059
0060 G4bool Par01PiModel::ModelTrigger(const G4FastTrack& fastTrack)
0061 {
0062   //-------------------------------------------------------------
0063   // UserTrigger() method: method which has to decide if
0064   // the parameterisation has to be applied.
0065   // Here ModelTrigger() asks the user (ie you) a 0/1 answer.
0066   //
0067   // Note that quantities like the local/global position/direction etc..
0068   // are available at this level via the fastTrack parameter (allowing
0069   // to check distance from boundaries, see below  to allow the decision)
0070   //--------------------------------------------------------------
0071   G4cout << "\nPar01PiModel::ModelTrigger() called:" << G4endl;
0072   G4cout << "--------------------------------" << G4endl;
0073   G4cout << "(particle is a " << fastTrack.GetPrimaryTrack()->GetDefinition()->GetParticleName()
0074          << " )\n"
0075          << G4endl;
0076
0077   // -- Examples of available informations:
0078
0079   // -- position:
0080   G4cout << "         Track position: " << fastTrack.GetPrimaryTrack()->GetPosition()
0081          << "(global coord.)" << fastTrack.GetPrimaryTrackLocalPosition() << "(in envelope coord.)"
0082          << G4endl;
0083
0084   // -- direction:
0085   G4cout << "         Track direction:" << fastTrack.GetPrimaryTrack()->GetMomentum().unit()
0086          << "(global coord.)" << fastTrack.GetPrimaryTrackLocalDirection() << "(in envelope coord.)"
0087          << G4endl;
0088
0089   return true;
0090 }
0091
0092 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0093
0094 void Par01PiModel::DoIt(const G4FastTrack& fastTrack, G4FastStep& fastStep)
0095 //--------------------------------------------------------
0096 //
0097 // User method to code the parameterisation properly said.
0098 //
0099 //--------------------------------------------------------
0100 {
0101   //------------------------------------------------
0102   // The primary track continues along its direction.
0103   // One secondary (a photon) is added:
0104   //------------------------------------------------
0105   G4cout << "      Pion `model' applied\n" << G4endl;
0106
0107   //------------------------------
0108   // Primary:
0109   //    idem as in "DefaultModel":
0110   //
0111   //------------------------------
0112   G4ThreeVector position;
0113   G4double distance;
0114   distance = fastTrack.GetEnvelopeSolid()->DistanceToOut(fastTrack.GetPrimaryTrackLocalPosition(),
0115                                                          fastTrack.GetPrimaryTrackLocalDirection());
0116   position =
0117     fastTrack.GetPrimaryTrackLocalPosition() + distance * fastTrack.GetPrimaryTrackLocalDirection();
0118
0119   // -- set final position:
0120   fastStep.ProposePrimaryTrackFinalPosition(position);
0121
0122   //---------------------------
0123   // Secondary:
0124   //   Adds one "secondary":
0125   //---------------------------
0126   // -- First, user has to say how many secondaries will be created:
0127   fastStep.SetNumberOfSecondaryTracks(1);
0128
0129   //------------------------
0130   // -- Build the secondary:
0131   //------------------------
0132   // -- direction:
0133   G4ParticleMomentum direction(fastTrack.GetPrimaryTrackLocalDirection());
0134   direction.setZ(direction.z() * 0.5);
0135   direction.setY(direction.y() + direction.z() * 0.1);
0136   direction = direction.unit();  // necessary ?
0137
0138   // -- dynamics (Note that many constructors exists for G4DynamicParticle
0139   // -- see prototype/particle+matter/particles/management/include/G4DynamicParticle.hh)
0140   G4DynamicParticle dynamique(G4Gamma::GammaDefinition(), direction,
0141                               fastTrack.GetPrimaryTrack()->GetKineticEnergy() / 2.);
0142   // -- position:
0143   G4double Dist;
0144   Dist = fastTrack.GetEnvelopeSolid()->DistanceToOut(fastTrack.GetPrimaryTrackLocalPosition(),
0145                                                      direction);
0146   G4ThreeVector posi;
0147   posi = fastTrack.GetPrimaryTrackLocalPosition() + Dist * direction;
0148
0149   //------------------------------------
0150   //-- Creation of the secondary Track:
0151   //------------------------------------
0152   fastStep.CreateSecondaryTrack(dynamique, posi, fastTrack.GetPrimaryTrack()->GetGlobalTime());
0153 }