Geant4 Cross Reference

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Geant4/examples/extended/medical/dna/svalue/src/PrimaryGeneratorAction.cc

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  1 //
  2 // ********************************************************************
  3 // * License and Disclaimer                                           *
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 10 // *                                                                  *
 11 // * Neither the authors of this software system, nor their employing *
 12 // * institutes,nor the agencies providing financial support for this *
 13 // * work  make  any representation or  warranty, express or implied, *
 14 // * regarding  this  software system or assume any liability for its *
 15 // * use.  Please see the license in the file  LICENSE  and URL above *
 16 // * for the full disclaimer and the limitation of liability.         *
 17 // *                                                                  *
 18 // * This  code  implementation is the result of  the  scientific and *
 19 // * technical work of the GEANT4 collaboration.                      *
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 21 // * any work based  on the software)  you  agree  to acknowledge its *
 22 // * use  in  resulting  scientific  publications,  and indicate your *
 23 // * acceptance of all terms of the Geant4 Software license.          *
 24 // ********************************************************************
 25 //
 26 // This example is provided by the Geant4-DNA collaboration
 27 // Any report or published results obtained using the Geant4-DNA software
 28 // shall cite the following Geant4-DNA collaboration publications:
 29 // Med. Phys. 45 (2018) e722-e739
 30 // Phys. Med. 31 (2015) 861-874
 31 // Med. Phys. 37 (2010) 4692-4708
 32 // Int. J. Model. Simul. Sci. Comput. 1 (2010) 157–178
 33 //
 34 // The Geant4-DNA web site is available at http://geant4-dna.org
 35 //
 36 /// \file medical/dna/svalue/src/PrimaryGeneratorAction.cc
 37 /// \brief Implementation of the PrimaryGeneratorAction class
 38 
 39 #include "PrimaryGeneratorAction.hh"
 40 
 41 #include "DetectorConstruction.hh"
 42 
 43 #include "G4RandomDirection.hh"
 44 #include "G4RunManager.hh"
 45 #include "G4StateManager.hh"
 46 #include "G4SystemOfUnits.hh"
 47 
 48 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
 49 
 50 PrimaryGeneratorAction::PrimaryGeneratorAction()
 51   : G4VUserPrimaryGeneratorAction(), G4VStateDependent(), fParticleGun(0), fDetector(0)
 52 {
 53   fDetector = dynamic_cast<const DetectorConstruction*>(
 54     G4RunManager::GetRunManager()->GetUserDetectorConstruction());
 55 }
 56 
 57 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
 58 
 59 PrimaryGeneratorAction::~PrimaryGeneratorAction()
 60 {
 61   G4StateManager::GetStateManager()->DeregisterDependent(this);
 62   if (fParticleGun) delete fParticleGun;
 63 }
 64 
 65 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
 66 
 67 void PrimaryGeneratorAction::GeneratePrimaries(G4Event* anEvent)
 68 {
 69   G4double thickness = fDetector->GetCytoThickness();
 70   G4double radius = fDetector->GetNuclRadius();
 71 
 72   G4double rx = 1 * m;
 73   G4double ry = 1 * m;
 74   G4double rz = 1 * m;
 75   G4double myRadius = 0;
 76 
 77   do {
 78     rx = (2 * G4UniformRand() - 1) * (radius + thickness) * 1.01;
 79     ry = (2 * G4UniformRand() - 1) * (radius + thickness) * 1.01;
 80     rz = (2 * G4UniformRand() - 1) * (radius + thickness) * 1.01;
 81     myRadius = std::sqrt(rx * rx + ry * ry + rz * rz);
 82 
 83   } while (myRadius > radius + thickness || myRadius < radius);
 84 
 85   fParticleGun->SetParticlePosition(G4ThreeVector(rx, ry, rz));
 86   fParticleGun->SetParticleMomentumDirection(G4RandomDirection());
 87   fParticleGun->GeneratePrimaryVertex(anEvent);
 88 }
 89 
 90 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
 91 
 92 G4bool PrimaryGeneratorAction::Notify(G4ApplicationState requestedState)
 93 {
 94   if (requestedState == G4State_Idle) {
 95     if (fParticleGun != 0) return true;
 96 
 97     fParticleGun = new G4ParticleGun(1);
 98 
 99     // Define default primary
100 
101     G4ParticleDefinition* particle = G4ParticleTable::GetParticleTable()->FindParticle("e-");
102     fParticleGun->SetParticleDefinition(particle);
103     fParticleGun->SetParticleEnergy(0 * eV);
104     fParticleGun->SetParticlePosition(G4ThreeVector());
105     fParticleGun->SetParticleMomentumDirection(G4ThreeVector(1, 0, 0));
106   }
107 
108   return true;
109 }
110