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// $Id: SteppingAction.cc,v 1.7 2010/10/13 13:42:33 vnivanch Exp $
// GEANT4 tag $Name: examples-V09-03-09 $
// 
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#include "SteppingAction.hh"
#include "PrimaryGeneratorAction.hh"
#include "RunAction.hh"
#include "HistoManager.hh"
#include "G4RunManager.hh"

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SteppingAction::SteppingAction(PrimaryGeneratorAction* prim,
                               RunAction* RuAct, HistoManager* Hist)
:primary(prim),runAction(RuAct), histoManager(Hist)
{ }

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SteppingAction::~SteppingAction()
{ }

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void SteppingAction::UserSteppingAction(const G4Step* aStep)
{
  const G4StepPoint* endPoint = aStep->GetPostStepPoint();
  G4String procName = endPoint->GetProcessDefinedStep()->GetProcessName();     
  G4bool transmit = (endPoint->GetStepStatus() <= fGeomBoundary);  
  if (transmit) { runAction->CountProcesses(procName); }
  else {                         
    //count real processes and sum track length
    G4double stepLength = aStep->GetStepLength();
    runAction->CountProcesses(procName);  
    runAction->SumTrack(stepLength);
  }
  
  //plot final state (only if continuous energy loss is small enough)
  //
   
  //scattered primary particle
  //
  G4int id = 1;
  if (aStep->GetTrack()->GetTrackStatus() == fAlive) {
    G4double energy = endPoint->GetKineticEnergy();      
    histoManager->FillHisto(id,energy);

    id = 2;
    G4ThreeVector direction = endPoint->GetMomentumDirection();
    G4double costeta = direction.x();
    histoManager->FillHisto(id,costeta);     
  }  
  
  //secondaries
  //
  const G4TrackVector* secondary = fpSteppingManager->GetSecondary();
  for (size_t lp=0; lp<(*secondary).size(); lp++) {
    G4double charge = (*secondary)[lp]->GetDefinition()->GetPDGCharge();
    if (charge != 0.) { id = 3; } else { id = 5; }
    G4double energy = (*secondary)[lp]->GetKineticEnergy();
    histoManager->FillHisto(id,energy);

    ++id;
    G4ThreeVector direction = (*secondary)[lp]->GetMomentumDirection();      
    G4double costeta = direction.x();
    histoManager->FillHisto(id,costeta);
      
    //energy tranferred to charged secondaries
    if (charge != 0.) { runAction->SumeTransf(energy); }         
  }
         
  // kill event after first interaction
  //
  G4RunManager::GetRunManager()->AbortEvent();  
}

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