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// $Id: TrackingAction.cc,v 1.2 2006/06/29 16:43:48 gunter Exp $
// GEANT4 tag $Name: geant4-09-03-cand-01 $
//
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#include "TrackingAction.hh"

#include "DetectorConstruction.hh"
#include "RunAction.hh"
#include "PrimaryGeneratorAction.hh"
#include "HistoManager.hh"

#include "G4Track.hh"

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TrackingAction::TrackingAction(DetectorConstruction* det, RunAction* run,
                               PrimaryGeneratorAction* kin, HistoManager* histo)
:detector(det), runAction(run), kinematic(kin), histoManager(histo)
{ }

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void TrackingAction::PostUserTrackingAction(const G4Track* track)
{
 G4int trackID = track->GetTrackID();
  
 //track length of primary particle or charged secondaries
 //
 G4double tracklen = track->GetTrackLength();
 if (trackID == 1) {
    runAction->AddTrackLength(tracklen);
    histoManager->FillHisto(3, tracklen);
 } else if (track->GetDefinition()->GetPDGCharge() != 0.)
    histoManager->FillHisto(6, tracklen);
           
 //extract projected range of primary particle
 //
 if (trackID == 1) {
   G4double pr = (track->GetPosition())*
                 (kinematic->GetParticleGun()->GetParticleMomentumDirection());
   runAction->AddProjRange(pr);
   histoManager->FillHisto(5, pr);
 }
            
 //mean step size of primary particle
 //
 if (trackID == 1) {
   G4int nbOfSteps = track->GetCurrentStepNumber();
   G4double stepSize = tracklen/nbOfSteps;
   runAction->AddStepSize(nbOfSteps,stepSize);
 }
}

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