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/// \file medical/GammaTherapy/src/PhantomSD.cc
/// \brief Implementation of the PhantomSD class
//
// -------------------------------------------------------------
//
//
//      ---------- PhantomSD -------------
//              
//  Modified:
//
// -------------------------------------------------------------

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#include "PhantomSD.hh"
#include "G4RunManager.hh"
#include "Run.hh"
#include "G4HCofThisEvent.hh"
#include "G4TouchableHistory.hh"
#include "G4Step.hh"
#include "G4SystemOfUnits.hh"

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PhantomSD::PhantomSD(const G4String& name)
  : G4VSensitiveDetector(name), fShiftZ(0.0),fCounter(0)
{}

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PhantomSD::~PhantomSD()
{}

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void PhantomSD::Initialize(G4HCofThisEvent*)
{
  Run* run = static_cast<Run*>(
             G4RunManager::GetRunManager()->GetNonConstCurrentRun());

  ++fCounter;
  if(run->GetVerbose()) {
    G4cout << "PhantomSD: Begin Of Event # " << fCounter << G4endl;
  }
}

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G4bool PhantomSD::ProcessHits(G4Step* aStep, G4TouchableHistory*)
{

  Run* run = static_cast<Run*>(
             G4RunManager::GetRunManager()->GetNonConstCurrentRun());

  G4double edep = aStep->GetTotalEnergyDeposit();

  // only if there is energy deposition
  if(0.0 < edep) {

    G4ThreeVector p1 = aStep->GetPreStepPoint()->GetPosition();
    G4ThreeVector p2 = aStep->GetPostStepPoint()->GetPosition();
    G4double x1 = p1.x();
    G4double y1 = p1.y();
    G4double z1 = p1.z() - fShiftZ;
    G4double r1 = std::sqrt(x1*x1 + y1*y1);
    G4double x2 = p2.x();
    G4double y2 = p2.y();
    G4double z2 = p2.z() - fShiftZ;
    G4double r2 = std::sqrt(x2*x2 + y2*y2);
    G4double x0 = 0.5*(x1 + x2);
    G4double y0 = 0.5*(y1 + y2);
    G4double z0 = 0.5*(z1 + z2);
    G4double r0 = std::sqrt(x0*x0 + y0*y0);

    run->AddPhantomStep(edep,r1,z1,r2,z2,r0,z0);

    if(run->GetVerbose()) {
      G4cout << "PhantomSD: energy = " << edep/MeV
             << " MeV is deposited at the step at r1,z1= " << r1 << " " << z1
             << "; r2,z2= " << r2 <<  " " << z2 << G4endl;
    }
  }

  return true;
}

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void PhantomSD::EndOfEvent(G4HCofThisEvent*)
{}

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void PhantomSD::clear()
{}

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void PhantomSD::PrintAll()
{}

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