G4RayShooter.cc

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//
// G4RayShooter class implementation
//
// Author: Makoto Asai, 2000
// --------------------------------------------------------------------
 
#include "G4RayShooter.hh"
#include "G4SystemOfUnits.hh"
#include "G4PrimaryParticle.hh"
#include "G4Event.hh"
#include "G4ParticleTable.hh"
#include "G4ParticleDefinition.hh"
#include "globals.hh"
 
G4RayShooter::G4RayShooter()
{
  SetInitialValues();
}
 
void G4RayShooter::SetInitialValues()
{
  G4ThreeVector zero;
  particle_momentum_direction = (G4ParticleMomentum)zero;
  particle_energy = 1.0*GeV;
  particle_position = zero;
  particle_polarization = zero;
}
 
G4RayShooter::~G4RayShooter()
{
}
 
void G4RayShooter::Shoot(G4Event* evt,G4ThreeVector vtx, G4ThreeVector direc)
{
  if(particle_definition == nullptr)
  {
    G4ParticleTable* particleTable = G4ParticleTable::GetParticleTable();
    G4String particleName;
    particle_definition = particleTable->FindParticle(particleName="geantino");
    if(particle_definition == nullptr)
    {
      G4String msg;
      msg = "G4RayTracer uses geantino to trace the ray, but your physics list does not\n";
      msg += "define G4Geantino. Please add G4Geantino in your physics list.";
      G4Exception("G4RayShooter::Shoot()", "RayTracer001", FatalException, msg);
    }
  }
 
  // Create a new vertex
  //
  G4PrimaryVertex* vertex = new G4PrimaryVertex(vtx,particle_time);
 
  // Create new primaries and set them to the vertex
  //
  G4double mass = particle_definition->GetPDGMass();
  G4PrimaryParticle* particle = new G4PrimaryParticle(particle_definition);
  particle->SetKineticEnergy( particle_energy );
  particle->SetMass( mass );
  particle->SetMomentumDirection( direc );
  particle->SetPolarization(particle_polarization.x(),
                            particle_polarization.y(),
                            particle_polarization.z());
  vertex->SetPrimary( particle );
 
  evt->AddPrimaryVertex( vertex );
}