Gabriele Cosmo
154 lines
6.3 KiB
C++
154 lines
6.3 KiB
C++
//
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// ********************************************************************
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// * License and Disclaimer *
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// * *
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// * The Geant4 software is copyright of the Copyright Holders of *
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// * the Geant4 Collaboration. It is provided under the terms and *
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// * conditions of the Geant4 Software License, included in the file *
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// * LICENSE and available at http://cern.ch/geant4/license . These *
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// * include a list of copyright holders. *
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// * *
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// * Neither the authors of this software system, nor their employing *
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// * institutes,nor the agencies providing financial support for this *
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// * work make any representation or warranty, express or implied, *
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// * regarding this software system or assume any liability for its *
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// * use. Please see the license in the file LICENSE and URL above *
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// * for the full disclaimer and the limitation of liability. *
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// * *
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// * This code implementation is the result of the scientific and *
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// * technical work of the GEANT4 collaboration. *
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// * By using, copying, modifying or distributing the software (or *
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// * any work based on the software) you agree to acknowledge its *
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// * use in resulting scientific publications, and indicate your *
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// * acceptance of all terms of the Geant4 Software license. *
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// ********************************************************************
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//
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/// \file Par01PiModel.cc
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/// \brief Implementation of the Par01PiModel class
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#include "Par01PiModel.hh"
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#include "G4Gamma.hh"
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#include "G4PionMinus.hh"
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#include "G4PionPlus.hh"
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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Par01PiModel::Par01PiModel(G4Region* anEnvelope)
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: G4VFastSimulationModel("Par01PiModel", anEnvelope)
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{
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;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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Par01PiModel::~Par01PiModel()
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{
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;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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G4bool Par01PiModel::IsApplicable(const G4ParticleDefinition& particleType)
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{
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return &particleType == G4PionMinus::PionMinusDefinition()
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|| &particleType == G4PionPlus::PionPlusDefinition();
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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G4bool Par01PiModel::ModelTrigger(const G4FastTrack& fastTrack)
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{
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//-------------------------------------------------------------
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// UserTrigger() method: method which has to decide if
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// the parameterisation has to be applied.
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// Here ModelTrigger() asks the user (ie you) a 0/1 answer.
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//
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// Note that quantities like the local/global position/direction etc..
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// are available at this level via the fastTrack parameter (allowing
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// to check distance from boundaries, see below to allow the decision)
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//--------------------------------------------------------------
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G4cout << "\nPar01PiModel::ModelTrigger() called:" << G4endl;
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G4cout << "--------------------------------" << G4endl;
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G4cout << "(particle is a " << fastTrack.GetPrimaryTrack()->GetDefinition()->GetParticleName()
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<< " )\n"
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<< G4endl;
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// -- Examples of available informations:
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// -- position:
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G4cout << " Track position: " << fastTrack.GetPrimaryTrack()->GetPosition()
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<< "(global coord.)" << fastTrack.GetPrimaryTrackLocalPosition() << "(in envelope coord.)"
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<< G4endl;
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// -- direction:
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G4cout << " Track direction:" << fastTrack.GetPrimaryTrack()->GetMomentum().unit()
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<< "(global coord.)" << fastTrack.GetPrimaryTrackLocalDirection() << "(in envelope coord.)"
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<< G4endl;
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return true;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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void Par01PiModel::DoIt(const G4FastTrack& fastTrack, G4FastStep& fastStep)
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//--------------------------------------------------------
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//
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// User method to code the parameterisation properly said.
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//
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//--------------------------------------------------------
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{
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//------------------------------------------------
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// The primary track continues along its direction.
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// One secondary (a photon) is added:
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//------------------------------------------------
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G4cout << " Pion `model' applied\n" << G4endl;
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//------------------------------
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// Primary:
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// idem as in "DefaultModel":
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//
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//------------------------------
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G4ThreeVector position;
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G4double distance;
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distance = fastTrack.GetEnvelopeSolid()->DistanceToOut(fastTrack.GetPrimaryTrackLocalPosition(),
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fastTrack.GetPrimaryTrackLocalDirection());
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position =
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fastTrack.GetPrimaryTrackLocalPosition() + distance * fastTrack.GetPrimaryTrackLocalDirection();
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// -- set final position:
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fastStep.ProposePrimaryTrackFinalPosition(position);
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//---------------------------
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// Secondary:
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// Adds one "secondary":
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//---------------------------
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// -- First, user has to say how many secondaries will be created:
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fastStep.SetNumberOfSecondaryTracks(1);
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//------------------------
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// -- Build the secondary:
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//------------------------
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// -- direction:
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G4ParticleMomentum direction(fastTrack.GetPrimaryTrackLocalDirection());
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direction.setZ(direction.z() * 0.5);
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direction.setY(direction.y() + direction.z() * 0.1);
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direction = direction.unit(); // necessary ?
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// -- dynamics (Note that many constructors exists for G4DynamicParticle
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// -- see prototype/particle+matter/particles/management/include/G4DynamicParticle.hh)
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G4DynamicParticle dynamique(G4Gamma::GammaDefinition(), direction,
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fastTrack.GetPrimaryTrack()->GetKineticEnergy() / 2.);
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// -- position:
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G4double Dist;
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Dist = fastTrack.GetEnvelopeSolid()->DistanceToOut(fastTrack.GetPrimaryTrackLocalPosition(),
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direction);
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G4ThreeVector posi;
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posi = fastTrack.GetPrimaryTrackLocalPosition() + Dist * direction;
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//------------------------------------
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//-- Creation of the secondary Track:
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//------------------------------------
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fastStep.CreateSecondaryTrack(dynamique, posi, fastTrack.GetPrimaryTrack()->GetGlobalTime());
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}
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