| 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 | // $Id: G3toG4PrimaryGeneratorAction.cc,v 1.5 2006/06/29 17:20:26 gunter Exp $
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| 28 | // GEANT4 tag $Name: $
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| 29 | //
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| 30 |
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| 31 | #include "globals.hh"
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| 32 | #include "Randomize.hh"
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| 33 | #include "G3toG4PrimaryGeneratorAction.hh"
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| 34 | #include "G4Event.hh"
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| 35 | #include "G4ParticleGun.hh"
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| 36 | #include "G4ParticleTable.hh"
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| 37 | #include "G4ParticleDefinition.hh"
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| 38 |
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| 39 | G3toG4PrimaryGeneratorAction::G3toG4PrimaryGeneratorAction(){
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| 40 | G4int n_particle = 1;
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| 41 | particleGun = new G4ParticleGun(n_particle);
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| 42 |
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| 43 | G4ParticleTable* particleTable = G4ParticleTable::GetParticleTable();
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| 44 | G4String particleName;
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| 45 | G4ParticleDefinition* particle
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| 46 | = particleTable->FindParticle(particleName="chargedgeantino");
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| 47 | particleGun->SetParticleDefinition(particle);
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| 48 | G4ThreeVector direction(0, 0, 1);
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| 49 | particleGun->SetParticleMomentumDirection(direction.unit());
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| 50 | particleGun->SetParticleEnergy(1.*GeV);
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| 51 | particleGun->SetParticlePosition(G4ThreeVector(0.*cm, 0.*cm,0.*cm));
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| 52 | }
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| 53 |
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| 54 | G3toG4PrimaryGeneratorAction::~G3toG4PrimaryGeneratorAction(){
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| 55 | delete particleGun;
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| 56 | }
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| 57 |
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| 58 | void
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| 59 | G3toG4PrimaryGeneratorAction::GeneratePrimaries(G4Event* anEvent){
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| 60 | //G4ThreeVector direction = GetRandomDirection();
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| 61 | //particleGun->SetParticleMomentumDirection( direction.unit() ) ;
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| 62 | G4cout << ">>>>>>>> Primary direction: "
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| 63 | << particleGun->GetParticleMomentumDirection() << G4endl;
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| 64 | particleGun->GeneratePrimaryVertex(anEvent);
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| 65 | }
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| 66 |
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| 67 | G4ThreeVector
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| 68 | G3toG4PrimaryGeneratorAction::GetRandomDirection() {
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| 69 |
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| 70 | G4ThreeVector retval;
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| 71 |
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| 72 | G4double CosTheta;
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| 73 | G4double SinTheta;
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| 74 |
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| 75 | G4double Phi;
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| 76 | G4double SinPhi;
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| 77 | G4double CosPhi;
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| 78 |
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| 79 | G4double rand;
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| 80 |
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| 81 | rand = G4UniformRand();
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| 82 |
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| 83 | CosTheta = 2.0*rand -1.0;
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| 84 | SinTheta = std::sqrt (1.-CosTheta*CosTheta);
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| 85 | rand = G4UniformRand();
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| 86 | Phi = twopi*rand;
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| 87 | SinPhi = std::sin (Phi);
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| 88 | CosPhi = std::cos (Phi);
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| 89 | retval.setX(SinTheta*CosPhi);
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| 90 | retval.setY(SinTheta*SinPhi);
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| 91 | retval.setZ(CosTheta);
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| 92 |
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| 93 | return retval;
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| 94 | }
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| 95 |
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