Gabriele Cosmo
93 lines
3.2 KiB
C++
93 lines
3.2 KiB
C++
//
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// ********************************************************************
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// * DISCLAIMER *
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// * *
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// * The following disclaimer summarizes all the specific disclaimers *
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// * of contributors to this software. The specific disclaimers,which *
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// * govern, are listed with their locations in: *
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// * http://cern.ch/geant4/license *
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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. *
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// * *
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// * This code implementation is the intellectual property of the *
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// * GEANT4 collaboration. *
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// * By copying, distributing or modifying the Program (or any work *
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// * based on the Program) you indicate your acceptance of this *
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// * statement, and all its terms. *
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// ********************************************************************
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//
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//
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// $Id: G3toG4PrimaryGeneratorAction.cc,v 1.3 2001/07/11 09:58:10 gunter Exp $
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// GEANT4 tag $Name: geant4-05-01 $
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//
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#include "globals.hh"
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#include "Randomize.hh"
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#include "G3toG4PrimaryGeneratorAction.hh"
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#include "G4Event.hh"
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#include "G4ParticleGun.hh"
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#include "G4ParticleTable.hh"
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#include "G4ParticleDefinition.hh"
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G3toG4PrimaryGeneratorAction::G3toG4PrimaryGeneratorAction(){
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G4int n_particle = 1;
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particleGun = new G4ParticleGun(n_particle);
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G4ParticleTable* particleTable = G4ParticleTable::GetParticleTable();
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G4String particleName;
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G4ParticleDefinition* particle
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= particleTable->FindParticle(particleName="chargedgeantino");
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particleGun->SetParticleDefinition(particle);
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G4ThreeVector direction(0, 0, 1);
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particleGun->SetParticleMomentumDirection(direction.unit());
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particleGun->SetParticleEnergy(1.*GeV);
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particleGun->SetParticlePosition(G4ThreeVector(0.*cm, 0.*cm,0.*cm));
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}
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G3toG4PrimaryGeneratorAction::~G3toG4PrimaryGeneratorAction(){
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delete particleGun;
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}
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void
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G3toG4PrimaryGeneratorAction::GeneratePrimaries(G4Event* anEvent){
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//G4ThreeVector direction = GetRandomDirection();
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//particleGun->SetParticleMomentumDirection( direction.unit() ) ;
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G4cout << ">>>>>>>> Primary direction: "
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<< particleGun->GetParticleMomentumDirection() << G4endl;
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particleGun->GeneratePrimaryVertex(anEvent);
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}
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G4ThreeVector
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G3toG4PrimaryGeneratorAction::GetRandomDirection() {
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G4ThreeVector retval;
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G4double CosTheta;
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G4double SinTheta;
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G4double Phi;
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G4double SinPhi;
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G4double CosPhi;
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G4double rand;
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rand = G4UniformRand();
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CosTheta = 2.0*rand -1.0;
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SinTheta = sqrt (1.-CosTheta*CosTheta);
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rand = G4UniformRand();
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Phi = twopi*rand;
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SinPhi = sin (Phi);
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CosPhi = cos (Phi);
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retval.setX(SinTheta*CosPhi);
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retval.setY(SinTheta*SinPhi);
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retval.setZ(CosTheta);
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return retval;
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}
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