bool AggregateCalorimeterSD::ProcessHits(G4Step* aStep, G4TouchableHistory*)
{
// check if energy was deposited
G4double edep = aStep->GetTotalEnergyDeposit();
if(edep==0.)
return false;
// as in DD4hep::Simulation::Geant4GenericSD<Calorimeter>
CLHEP::Hep3Vector prePos = aStep->GetPreStepPoint()->GetPosition();
CLHEP::Hep3Vector postPos = aStep->GetPostStepPoint()->GetPosition();
CLHEP::Hep3Vector midPos = 0.5*(postPos + prePos);
DD4hep::Simulation::Position pos(midPos.x(), midPos.y(), midPos.z());
// check the cell ID
uint64_t id = utils::cellID(m_seg, *aStep);
DD4hep::Simulation::Geant4CalorimeterHit* hit = nullptr;
DD4hep::Simulation::Geant4CalorimeterHit* hitMatch = nullptr;
// Check if there is already some energy deposit in that cell
for(int i=0; i<m_calorimeterCollection->entries(); i++) {
hit = dynamic_cast<DD4hep::Simulation::Geant4CalorimeterHit*>
(m_calorimeterCollection->GetHit(i));
if(hit->cellID == id) {
hitMatch = hit;
hitMatch->energyDeposit += edep;
return true;
}
}
// if not, create a new hit
// deleted in ~G4Event
hitMatch = new DD4hep::Simulation::Geant4CalorimeterHit(pos);
hitMatch->cellID = id;
hitMatch->energyDeposit = edep;
m_calorimeterCollection->insert(hitMatch);
return true;
}
bool GflashCalorimeterSD::ProcessHits(G4GFlashSpot* aSpot, G4TouchableHistory*) {
// This method will be called if gflash parametrisation is performed
G4double edep = aSpot->GetEnergySpot()->GetEnergy();
// check if energy was deposited
if (edep == 0.) return false;
CLHEP::Hep3Vector geantPos = aSpot->GetEnergySpot()->GetPosition();
dd4hep::Position pos(geantPos.x(), geantPos.y(), geantPos.z());
// create a new hit
// deleted in ~G4Event
dd4hep::sim::Geant4CalorimeterHit* hit = new dd4hep::sim::Geant4CalorimeterHit(pos);
hit->cellID = cellID(*aSpot);
hit->energyDeposit = edep;
m_calorimeterCollection->insert(hit);
return true;
}
bool SimpleCalorimeterSD::ProcessHits(G4Step* aStep, G4TouchableHistory*)
{
// check if energy was deposited
G4double edep = aStep->GetTotalEnergyDeposit();
if(edep==0.)
return false;
// as in DD4hep::Simulation::Geant4GenericSD<Calorimeter>
CLHEP::Hep3Vector prePos = aStep->GetPreStepPoint()->GetPosition();
DD4hep::Simulation::Position pos(prePos.x(), prePos.y(), prePos.z());
auto hit = new DD4hep::Simulation::Geant4CalorimeterHit(pos);
hit->cellID = utils::cellID(m_seg, *aStep);
hit->energyDeposit = edep;
m_calorimeterCollection->insert(hit);
return true;
}
bool GflashCalorimeterSD::ProcessHits(G4Step* aStep, G4TouchableHistory*) {
// This method is called if full simulation is performed
// check if energy was deposited
G4double edep = aStep->GetTotalEnergyDeposit();
if (edep == 0.) return false;
CLHEP::Hep3Vector prePos = aStep->GetPreStepPoint()->GetPosition();
dd4hep::Position pos(prePos.x(), prePos.y(), prePos.z());
// create a new hit
// deleted in ~G4Event
dd4hep::sim::Geant4CalorimeterHit* hit = new dd4hep::sim::Geant4CalorimeterHit(pos);
hit->cellID = utils::cellID(m_seg, *aStep);
hit->energyDeposit = edep;
m_calorimeterCollection->insert(hit);
return true;
}
void magFieldFromSegment(double * segment, double * pos, double * result)
{
CLHEP::Hep3Vector center(segment[0],segment[1],segment[2]);
CLHEP::Hep3Vector length(segment[3],segment[4],segment[5]);
CLHEP::Hep3Vector position(pos[0],pos[1],pos[2]);
CLHEP::Hep3Vector dist = center - position;
double L = length.mag();
double A = length.dot(dist) / L;
double BSq = dist.mag2() - A*A;
double APlusHalfL = (A + 0.5 * L);
double AMinusHalfL = (A - 0.5 * L);
double factor = APlusHalfL/sqrt(BSq + APlusHalfL*APlusHalfL) - AMinusHalfL/sqrt(BSq + AMinusHalfL*AMinusHalfL);
CLHEP::Hep3Vector field = ((MUOVERFOURPI * factor) / (BSq * L )) * dist.cross(length);
result[0] = field.x();
result[1] = field.y();
result[2] = field.z();
}
bool SimpleTrackerSD::ProcessHits(G4Step* aStep, G4TouchableHistory*)
{
// check if energy was deposited
G4double edep = aStep->GetTotalEnergyDeposit();
if(edep==0.)
return false;
// as in DD4hep::Simulation::Geant4GenericSD<Tracker>
CLHEP::Hep3Vector prePos = aStep->GetPreStepPoint()->GetPosition();
CLHEP::Hep3Vector postPos = aStep->GetPostStepPoint()->GetPosition();
DD4hep::Simulation::Position position(prePos.x(), prePos.y(), prePos.z());
CLHEP::Hep3Vector direction = postPos - prePos;
// create a hit and add it to collection
const G4Track* track = aStep->GetTrack();
// deleted in ~G4Event
auto hit = new DD4hep::Simulation::Geant4TrackerHit(
track->GetTrackID(), track->GetDefinition()->GetPDGEncoding(),edep, track->GetGlobalTime());
hit->cellID = segmentation::cellID(m_seg, *aStep);
hit->energyDeposit = edep;
hit->position = position;
hit->momentum = direction;
m_trackerCollection->insert(hit);
return true;
}