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// $Id: G4MSSteppingAction.cc 66892 2013-01-17 10:57:59Z gunter $
//
//
//


#include "G4MSSteppingAction.hh"

#include "G4Step.hh"
#include "G4VPhysicalVolume.hh"
#include "G4LogicalVolume.hh"
#include "G4Region.hh"
#include "G4Material.hh"

G4MSSteppingAction::G4MSSteppingAction()
{
  Initialize(false,0);
}

G4MSSteppingAction::~G4MSSteppingAction()
{;}
 
void G4MSSteppingAction::Initialize(G4bool rSens,G4Region* reg)
{
  regionSensitive = rSens;
  theRegion = reg;
  length = 0.;
  x0 = 0.;
  lambda = 0.;
}
  
void G4MSSteppingAction::UserSteppingAction(const G4Step* aStep)
{
  G4StepPoint* preStepPoint = aStep->GetPreStepPoint();
  G4Region* region = preStepPoint->GetPhysicalVolume()->GetLogicalVolume()->GetRegion();

  if(regionSensitive && (region!=theRegion)) return;

  G4double stlen = aStep->GetStepLength();
  G4Material* material = preStepPoint->GetMaterial();
  length += stlen;
  x0 += stlen/(material->GetRadlen());
  lambda += stlen/(material->GetNuclearInterLength());
}