//
// ********************************************************************
// * License and Disclaimer                                           *
// *                                                                  *
// * The  Geant4 software  is  copyright of the Copyright Holders  of *
// * the Geant4 Collaboration.  It is provided  under  the terms  and *
// * conditions of the Geant4 Software License,  included in the file *
// * LICENSE and available at  http://cern.ch/geant4/license .  These *
// * include a list of copyright holders.                             *
// *                                                                  *
// * Neither the authors of this software system, nor their employing *
// * institutes,nor the agencies providing financial support for this *
// * work  make  any representation or  warranty, express or implied, *
// * regarding  this  software system or assume any liability for its *
// * use.  Please see the license in the file  LICENSE  and URL above *
// * for the full disclaimer and the limitation of liability.         *
// *                                                                  *
// * This  code  implementation is the result of  the  scientific and *
// * technical work of the GEANT4 collaboration.                      *
// * By using,  copying,  modifying or  distributing the software (or *
// * any work based  on the software)  you  agree  to acknowledge its *
// * use  in  resulting  scientific  publications,  and indicate your *
// * acceptance of all terms of the Geant4 Software license.          *
// ********************************************************************
//
// $Id$
//
/// \file ScreenSD.cc
/// \brief Implementation of the ScreenSD class
//

#include "ScreenSD.hh"
#include "Analysis.hh"

#include "G4VTouchable.hh"
#include "G4Step.hh"
#include "G4ios.hh"
#include "G4SystemOfUnits.hh"

#include "G4VProcess.hh"

//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......

ScreenSD::ScreenSD(const G4String& name)
 : G4VSensitiveDetector(name)
{}

//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......

ScreenSD::~ScreenSD()
{}

//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......

void ScreenSD::Initialize(G4HCofThisEvent* /*hce*/)
{}

//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......

G4bool ScreenSD::ProcessHits(G4Step* step, G4TouchableHistory* /*history*/)
{
  // Current track:
  const G4Track* track = step->GetTrack();

  // Track ID:
  G4int ID = track->GetTrackID();

  // code PDG:
  G4int pdgCode = track->GetDefinition()->GetPDGEncoding();

  // Remember preStepPoint:
  G4StepPoint* preStepPoint = step->GetPreStepPoint();

  // Ekin:
  G4double Ekin =  preStepPoint->GetKineticEnergy();

  // Obtain local coordinates:
  const G4VTouchable* touchable = preStepPoint->GetTouchable();
  G4ThreeVector globalPosition = preStepPoint->GetPosition();
  G4ThreeVector localPosition 
    = touchable->GetHistory()->GetTopTransform().TransformPoint(globalPosition);
  // // Example for obtaining the local direction:
  // G4ThreeVector globalDirection = preStepPoint->GetMomentumDirection();
  // G4ThreeVector localDirection 
  //   = touchable->GetHistory()->GetTopTransform().TransformAxis(localDirection);

  // Time
  G4double time = preStepPoint->GetGlobalTime();
  
  // Store hit in the ntuple
  G4AnalysisManager* analysisManager = G4AnalysisManager::Instance();
  analysisManager->FillNtupleIColumn(0, ID);
  analysisManager->FillNtupleIColumn(1, pdgCode);
  analysisManager->FillNtupleDColumn(2, Ekin/MeV);
  analysisManager->FillNtupleDColumn(3, localPosition.x()/cm);
  analysisManager->FillNtupleDColumn(4, localPosition.y()/cm);
  analysisManager->FillNtupleDColumn(5, time/ns);
  analysisManager->AddNtupleRow();  

  return true;
}

//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......

void ScreenSD::EndOfEvent(G4HCofThisEvent* /*hce*/)
{}

//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
