svalue/src/PrimaryGeneratorAction.cc

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0025 //
0026 // This example is provided by the Geant4-DNA collaboration
0027 // Any report or published results obtained using the Geant4-DNA software
0028 // shall cite the following Geant4-DNA collaboration publications:
0029 // Med. Phys. 45 (2018) e722-e739
0030 // Phys. Med. 31 (2015) 861-874
0031 // Med. Phys. 37 (2010) 4692-4708
0032 // Int. J. Model. Simul. Sci. Comput. 1 (2010) 157–178
0033 //
0034 // The Geant4-DNA web site is available at http://geant4-dna.org
0035 //
0036 /// \file medical/dna/svalue/src/PrimaryGeneratorAction.cc
0037 /// \brief Implementation of the PrimaryGeneratorAction class
0038
0039 #include "PrimaryGeneratorAction.hh"
0040
0041 #include "DetectorConstruction.hh"
0042
0043 #include "G4RandomDirection.hh"
0044 #include "G4RunManager.hh"
0045 #include "G4StateManager.hh"
0046 #include "G4SystemOfUnits.hh"
0047
0048 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0049
0050 PrimaryGeneratorAction::PrimaryGeneratorAction()
0051   : G4VUserPrimaryGeneratorAction(), G4VStateDependent(), fParticleGun(0), fDetector(0)
0052 {
0053   fDetector = dynamic_cast<const DetectorConstruction*>(
0054     G4RunManager::GetRunManager()->GetUserDetectorConstruction());
0055 }
0056
0057 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0058
0059 PrimaryGeneratorAction::~PrimaryGeneratorAction()
0060 {
0061   G4StateManager::GetStateManager()->DeregisterDependent(this);
0062   if (fParticleGun) delete fParticleGun;
0063 }
0064
0065 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0066
0067 void PrimaryGeneratorAction::GeneratePrimaries(G4Event* anEvent)
0068 {
0069   G4double thickness = fDetector->GetCytoThickness();
0070   G4double radius = fDetector->GetNuclRadius();
0071
0072   G4double rx = 1 * m;
0073   G4double ry = 1 * m;
0074   G4double rz = 1 * m;
0075   G4double myRadius = 0;
0076
0077   do {
0078     rx = (2 * G4UniformRand() - 1) * (radius + thickness) * 1.01;
0079     ry = (2 * G4UniformRand() - 1) * (radius + thickness) * 1.01;
0080     rz = (2 * G4UniformRand() - 1) * (radius + thickness) * 1.01;
0081     myRadius = std::sqrt(rx * rx + ry * ry + rz * rz);
0082
0083   } while (myRadius > radius + thickness || myRadius < radius);
0084
0085   fParticleGun->SetParticlePosition(G4ThreeVector(rx, ry, rz));
0086   fParticleGun->SetParticleMomentumDirection(G4RandomDirection());
0087   fParticleGun->GeneratePrimaryVertex(anEvent);
0088 }
0089
0090 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0091
0092 G4bool PrimaryGeneratorAction::Notify(G4ApplicationState requestedState)
0093 {
0094   if (requestedState == G4State_Idle) {
0095     if (fParticleGun != 0) return true;
0096
0097     fParticleGun = new G4ParticleGun(1);
0098
0099     // Define default primary
0100
0101     G4ParticleDefinition* particle = G4ParticleTable::GetParticleTable()->FindParticle("e-");
0102     fParticleGun->SetParticleDefinition(particle);
0103     fParticleGun->SetParticleEnergy(0 * eV);
0104     fParticleGun->SetParticlePosition(G4ThreeVector());
0105     fParticleGun->SetParticleMomentumDirection(G4ThreeVector(1, 0, 0));
0106   }
0107
0108   return true;
0109 }