MW_SD.cc

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//! \file
//!
//! Source file for MWPC sensitive detector class.
//!
//! The MW_SD class defines the member functions for processing the hit
//! information whenever a hit is simulated in the detector.  These
//! routines initialise the hit collection, process hits, and perform
//! the end of event action which fills the hit information arrays.
//!
//! \author D.K. Hasell
//! \version 1.0
//! \date 2010-10-31
//!
//! \ingroup detector

// *+****1****+****2****+****3****+****4****+****5****+****6****+****7****+****

// Include the MW header files and the user header files referenced here.

#include "MW_SD.h"
#include "MW_Hit.h"
#include "MW_Data.h"
#include "MW_Messenger.h"

#include "EventAction.h"

// Include the GEANT4 header files used here.

#include "G4VSensitiveDetector.hh"
#include "G4HCofThisEvent.hh"
#include "G4SDManager.hh"
#include "G4Step.hh"
#include "G4TouchableHistory.hh"
#include "G4TouchableHandle.hh"
#include "G4StepPoint.hh"
#include "G4ThreeVector.hh"

#include "Randomize.hh"

// Use the standard namespace.

using namespace std;

// *+****1****+****2****+****3****+****4****+****5****+****6****+****7****+****

// MW_SD source code.

// Constructor.

MW_SD::MW_SD( G4String name ) : G4VSensitiveDetector( name ) {

   // Insert hits collection name.

   collectionName.insert( "MW_HC" );

   // Create pointer to MW SD Messenger.

   MW_Messenger::Instance()->setMW_SDptr( this );

   // Set defaults.

   MW_threshold = 1.0 * eV;
   MW_Xresol = 0.1 * cm;
   MW_Yresol = 0.1 * cm;

   // Initially transformations are not defined so Boolean is false.

   for( int i = 0; i < N_MW; ++i ) MW_Transform[i] = false;
}

// Destructor.

MW_SD::~MW_SD(){}

// Initialize hits collection.

void MW_SD::Initialize( G4HCofThisEvent * HCE ) {

   MW_HC = new
      MW_HitsCollection( SensitiveDetectorName, collectionName[0] ); 

   static G4int HCID = -1;   
   if( HCID < 0 ) {
      HCID = G4SDManager::GetSDMpointer()->GetCollectionID(collectionName[0]);
   }

   HCE->AddHitsCollection( HCID, MW_HC );
}

// Process hits.

G4bool MW_SD::ProcessHits( G4Step * step, G4TouchableHistory * ROhist ) {

   // Get the total energy deposited in this step.

   G4double edep = step->GetTotalEnergyDeposit();

   // Skip this hit if below threshold.

   if( edep < MW_threshold ) return false;

   // Get the PreStepPoint and the TouchableHandle.

   G4StepPoint * prestep = step->GetPreStepPoint();

   G4TouchableHandle touchable = prestep->GetTouchableHandle();

   // Get copy number (used to identify which MW).

   G4int copyno = touchable->GetCopyNumber();

   // Get the track.

   G4Track * track = step->GetTrack();

   // Get the global time and track ID.

   G4double time = prestep->GetGlobalTime();
   G4int id = track->GetTrackID();

   // Get the true world and local coordinate positions.

   G4ThreeVector trueworld = prestep->GetPosition();

   // If this first time store transformation and inverse.

   if( !MW_Transform[copyno] ) {
      MW_WorldtoLocal[copyno] = touchable->GetHistory()->GetTopTransform();
      MW_LocaltoWorld[copyno] = MW_WorldtoLocal[copyno].Inverse();
      MW_Transform[copyno] = true;
   }

   G4ThreeVector truelocal = MW_WorldtoLocal[copyno].TransformPoint(trueworld);

   // Create local coordinates smeared by resolutions.

   G4ThreeVector local(
      truelocal.x() + CLHEP::RandGauss::shoot( 0.0, MW_Xresol ),
      truelocal.y() + CLHEP::RandGauss::shoot( 0.0, MW_Yresol ),
      truelocal.z() );

   // Transform smeared local coordinates to world coordinate system.

   G4ThreeVector world = MW_LocaltoWorld[copyno].TransformPoint( local );

   // Create a pointer to a new Hit.

   MW_Hit * hit = new MW_Hit();

   // Fill the Hit information.

   hit->copyno  = copyno;
   hit->trackid = id;
   hit->edep    = edep;
   hit->time    = time;
   hit->tworld  = trueworld;
   hit->tlocal  = truelocal;
   hit->world   = world;
   hit->local   = local;

   // Add the Hit to the Hit Collection.

   MW_HC->insert( hit );
   
   //hit->Print();

   return true;
}

// Routine to process the hits at the end of an event.

void MW_SD::EndOfEvent( G4HCofThisEvent * HCE ){

//   PrintAll();

   MW_Data * mwdata = EventAction::mwdata;

   mwdata->Reset();

   G4int N_Hits = MW_HC->entries();
   
   mwdata->nMW = N_Hits;

   for( G4int i = 0; i < N_Hits; ++i ) {

      mwdata->id.push_back( ( *MW_HC )[i]->copyno );
      mwdata->tr.push_back( ( *MW_HC )[i]->trackid );

      mwdata->e.push_back( ( *MW_HC )[i]->edep / eV );
      mwdata->t.push_back( ( *MW_HC )[i]->time / ns );

      mwdata->tx.push_back( ( *MW_HC )[i]->tworld.x() / cm );
      mwdata->ty.push_back( ( *MW_HC )[i]->tworld.y() / cm );
      mwdata->tz.push_back( ( *MW_HC )[i]->tworld.z() / cm );

      mwdata->txl.push_back( ( *MW_HC )[i]->tlocal.x() / cm );
      mwdata->tyl.push_back( ( *MW_HC )[i]->tlocal.y() / cm );
      mwdata->tzl.push_back( ( *MW_HC )[i]->tlocal.z() / cm );

      mwdata->x.push_back( ( *MW_HC )[i]->world.x() / cm );
      mwdata->y.push_back( ( *MW_HC )[i]->world.y() / cm );
      mwdata->z.push_back( ( *MW_HC )[i]->world.z() / cm );

      mwdata->xl.push_back( ( *MW_HC )[i]->local.x() / cm );
      mwdata->yl.push_back( ( *MW_HC )[i]->local.y() / cm );
      mwdata->zl.push_back( ( *MW_HC )[i]->local.z() / cm );
   }

}

void MW_SD::clear(){} 

void MW_SD::DrawAll() {} 

// Print all the hits.

void MW_SD::PrintAll() {
   G4int N_Hits = MW_HC->entries();
   G4cout << "\nMW Hits Collection N_Hits = " << N_Hits << "\n" << G4endl; 
   for ( G4int i = 0; i < N_Hits; ++i ) (*MW_HC)[i]->Print();
} 

// Set/Get energy threshold.

G4double MW_SD::setThreshold( G4double thres ) { return MW_threshold = thres; }
G4double MW_SD::getThreshold() { return MW_threshold; }

// Set/Get X resolution.

G4double MW_SD::setXresol( G4double res ) { return MW_Xresol = res; }
G4double MW_SD::getXresol() { return MW_Xresol; }

// Set/Get Y resolution.

G4double MW_SD::setYresol( G4double res ) { return MW_Yresol = res; }
G4double MW_SD::getYresol() { return MW_Yresol; }