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// $Id: AXPETSteppingAction.cc,v 1.1 2008/09/03 13:34:03 gcosmo Exp $
// ------------------------------------------------------------
// Geant4 class implementation file
//
// 03/09/2008, by T.Nikitina
// ------------------------------------------------------------

#include "G4SteppingManager.hh"
#include "G4TrackVector.hh"

#include "AXPETSteppingAction.hh"

#include "AXPETDetectorConstruction.hh"
#include "AXPETRunAction.hh"

#include "G4Track.hh"
#include "G4Event.hh"
#include "G4EventManager.hh"
#include "G4ParticleDefinition.hh"
#include "G4ProcessManager.hh"
#include "G4OpBoundaryProcess.hh"
#include "G4ios.hh"
#include <iomanip>
#include "G4UImanager.hh"
#include "G4VPhysicalVolume.hh"
#include "G4VSolid.hh"
#include "G4RotationMatrix.hh"
#include "G4AffineTransform.hh"
AXPETSteppingAction::AXPETSteppingAction(AXPETDetectorConstruction* DET,
                                         AXPETRunAction* RA)
:detector (DET), runaction (RA)
{

  G4cout << "Costructor of the Stepping Action class " << G4endl;
  
}


AXPETSteppingAction::~AXPETSteppingAction()
{;}


void AXPETSteppingAction::UserSteppingAction(const G4Step* aStep)
{

  // track informations
  //
  // const G4StepPoint* prePoint = aStep->GetPreStepPoint();   
  const G4StepPoint* endPoint = aStep->GetPostStepPoint();
  const G4ParticleDefinition* particle = aStep->GetTrack()->GetDefinition(); 

  G4String partName  = particle->GetParticleName();
  G4VPhysicalVolume* postVolume_phys=endPoint->GetPhysicalVolume();
  G4String solidName=" out of Crystal ";
  if(postVolume_phys)    // Reach to out of the world
  solidName = postVolume_phys->GetLogicalVolume()->GetSolid()->GetName();
  //Detect optical photons going outside Volume

  if(partName=="opticalphoton")
  {
    // Additional Printing on each Step
    //
    // G4cout<<aStep->GetTrack()->GetCurrentStepNumber()<<" StartPoint="<<prePoint->GetPosition()
    // <<" EndPoint="<<endPoint->GetPosition()<<" NextSolid= "<<solidName<<G4endl;
    // G4cout<<aStep->GetTrack()->GetCurrentStepNumber()<<" StartDirection="<<prePoint->GetMomentumDirection()
    // <<" EndDirection="<<endPoint->GetMomentumDirection()<<" NextSolid= "<<solidName<<G4endl;
    G4double x=endPoint->GetPosition().x()/mm;
    G4double y=endPoint->GetPosition().y()/mm;
    //
    // Condition to detect Escaping Optical Photon: 
    //
    if(std::sqrt(x*x+y*y)>(detector->GetExtend()*2.)){
      G4cerr.precision(16);
      G4cerr << "ERROR - UserSteppingAction::OpticalPhoton is out of Crystal Solid" << G4endl
	     <<" Wrong Point is "<<xStep<<"  "<<yStep<<"  "<<zStep << G4endl
             <<" Wrong Direction is "<<xDirection<<"  "<<yDirection<<"  "<<zDirection<< G4endl;
      G4VSolid *solid=detector->GetSolid();
      G4ThreeVector point = G4ThreeVector(xStep,yStep,zStep);
      G4ThreeVector dir = G4ThreeVector(xDirection,yDirection,zDirection); 
        G4ThreeVector norm,*pNorm;
        G4bool *pgoodNorm, goodNorm, calcNorm=true;
        pNorm=&norm;
        pgoodNorm=&goodNorm;

       EInside surface=solid->Inside(point);
       if(surface == kInside){
	 G4cout<<"WrongPoint is Inside DistanceToOut="<<solid->DistanceToOut(point,dir,calcNorm,pgoodNorm,pNorm)<<" Norm(DistToOut)="<<norm<<G4endl;
       }
       else if(surface == kOutside){
       G4cout<<"WrongPoint is Outside DistanceToIn(p,+v)="<<solid->DistanceToIn(point,dir)<<G4endl;
       G4cout<<"                      DistanceToIn(p,-v)="<<solid->DistanceToIn(point,-dir)<<G4endl;
       }
       else{
       G4cout<<"WrongPoint is On Surface DistanceToIn(p,+v)="<<solid->DistanceToIn(point,dir)<<G4endl;
       G4cout<<"                         DistanceToIn(p,-v)="<<solid->DistanceToIn(point,-dir)<<G4endl;
       G4cout<<"                         DistanceToOut="<<solid->DistanceToOut(point,dir,calcNorm,pgoodNorm,pNorm)<<" Norm(DistanceToOut)="<<norm<<G4endl;
       G4cout<<"                         SurfaceNormal=="<<solid->SurfaceNormal(point)<<G4endl;
       }
       if(detector->GetAbortAction()){
       G4Exception( "  ", "Escaping Optical Photon",
                  FatalException, "Optical Photon outside Crystal" );
       }
       else{
       G4Exception( "  ", "Escaping Optical Photon",
                  JustWarning, "Optical Photon outside Crystal" );
       }
    }
    // Save values of Step
   
    xStep=x;
    yStep=y;
    zStep=endPoint->GetPosition().z()/mm;
    xDirection=endPoint->GetMomentumDirection().x();
    yDirection=endPoint->GetMomentumDirection().y();
    zDirection=endPoint->GetMomentumDirection().z();
  }
}