G4PSFlatSurfaceFlux.cc

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//
// $Id$
//
// G4PSFlatSurfaceFlux
#include "G4PSFlatSurfaceFlux.hh"

#include "G4SystemOfUnits.hh"
#include "G4StepStatus.hh"
#include "G4Track.hh"
#include "G4VSolid.hh"
#include "G4VPhysicalVolume.hh"
#include "G4VPVParameterisation.hh"
#include "G4UnitsTable.hh"
#include "G4GeometryTolerance.hh"
// (Description)
//   This is a primitive scorer class for scoring Surface Flux.
//  Current version assumes only for G4Box shape, and the surface
//  is fixed on -Z plane.
//
// Surface is defined at the -Z surface.
// Direction                  -Z   +Z
//   0  IN || OUT            ->|<-  |
//   1  IN                   ->|    |
//   2  OUT                    |<-  |
//
// Created: 2005-11-14  Tsukasa ASO, Akinori Kimura.
// 
// 18-Nov-2005  T.Aso,  To use always positive value for anglefactor.
// 29-Mar-2007  T.Aso,  Bug fix for momentum direction at outgoing flux.
// 2010-07-22   Introduce Unit specification.
// 2010-07-22   Add weighted and divideByAre options

G4PSFlatSurfaceFlux::G4PSFlatSurfaceFlux(G4String name, 
                                         G4int direction, G4int depth)
  : G4VPrimitiveScorer(name,depth),HCID(-1),fDirection(direction),
    weighted(true),divideByArea(true)
{
    DefineUnitAndCategory();
    SetUnit("percm2");
}

G4PSFlatSurfaceFlux::G4PSFlatSurfaceFlux(G4String name, 
                                         G4int direction, 
                                         const G4String& unit,
                                         G4int depth)
  : G4VPrimitiveScorer(name,depth),HCID(-1),fDirection(direction),
    weighted(true),divideByArea(true)
{
    DefineUnitAndCategory();
    SetUnit(unit);
}

G4PSFlatSurfaceFlux::~G4PSFlatSurfaceFlux()
{;}

G4bool G4PSFlatSurfaceFlux::ProcessHits(G4Step* aStep,G4TouchableHistory*)
{
  G4StepPoint* preStep = aStep->GetPreStepPoint();
  G4VPhysicalVolume* physVol = preStep->GetPhysicalVolume();
  G4VPVParameterisation* physParam = physVol->GetParameterisation();
  G4VSolid * solid = 0;
  if(physParam)
  { // for parameterized volume
    G4int idx = ((G4TouchableHistory*)(aStep->GetPreStepPoint()->GetTouchable()))
                ->GetReplicaNumber(indexDepth);
    solid = physParam->ComputeSolid(idx, physVol);
    solid->ComputeDimensions(physParam,idx,physVol);
  }
  else
  { // for ordinary volume
    solid = physVol->GetLogicalVolume()->GetSolid();
  }

  G4Box* boxSolid = (G4Box*)(solid);

  G4int dirFlag =IsSelectedSurface(aStep,boxSolid);
  if ( dirFlag > 0 ) {
    if ( fDirection == fFlux_InOut || fDirection == dirFlag ){

      G4StepPoint* thisStep=0;
      if ( dirFlag == fFlux_In ){
        thisStep = preStep;
      }else if ( dirFlag == fFlux_Out ){
        thisStep = aStep->GetPostStepPoint();
      }else{
        return FALSE;
      }

      G4TouchableHandle theTouchable = thisStep->GetTouchableHandle();
      G4ThreeVector pdirection = thisStep->GetMomentumDirection();
      G4ThreeVector localdir  = 
        theTouchable->GetHistory()->GetTopTransform().TransformAxis(pdirection);
      //
      G4double angleFactor = localdir.z();
      if ( angleFactor < 0 ) angleFactor *= -1.;
      G4double flux = 1.0;
      if ( weighted ) flux *=preStep->GetWeight(); // Current (Particle Weight)
      //
      G4double square = 4.*boxSolid->GetXHalfLength()*boxSolid->GetYHalfLength();
      //
      flux = flux/angleFactor;  // Flux with angle.
      if ( divideByArea ) flux /= square;
      //
      G4int index = GetIndex(aStep);
      EvtMap->add(index,flux);
    }
  }
#ifdef debug
    G4cout << " PASSED vol " 
           << index << " trk "<<trkid<<" len " << fFlatSurfaceFlux<<G4endl;
#endif

  return TRUE;
}

G4int G4PSFlatSurfaceFlux::IsSelectedSurface(G4Step* aStep, G4Box* boxSolid){

  G4TouchableHandle theTouchable = 
    aStep->GetPreStepPoint()->GetTouchableHandle();
  G4double kCarTolerance=G4GeometryTolerance::GetInstance()->GetSurfaceTolerance();

  if (aStep->GetPreStepPoint()->GetStepStatus() == fGeomBoundary ){
    // Entering Geometry
    G4ThreeVector stppos1= aStep->GetPreStepPoint()->GetPosition();
    G4ThreeVector localpos1 = 
      theTouchable->GetHistory()->GetTopTransform().TransformPoint(stppos1);
    if(std::fabs( localpos1.z() + boxSolid->GetZHalfLength())<kCarTolerance ){
      return fFlux_In;
    }
  }

  if (aStep->GetPostStepPoint()->GetStepStatus() == fGeomBoundary ){
    // Exiting Geometry
    G4ThreeVector stppos2= aStep->GetPostStepPoint()->GetPosition();
    G4ThreeVector localpos2 = 
      theTouchable->GetHistory()->GetTopTransform().TransformPoint(stppos2);
    if(std::fabs( localpos2.z() + boxSolid->GetZHalfLength())<kCarTolerance ){
      return fFlux_Out;
    }
  }

  return -1;
}

void G4PSFlatSurfaceFlux::Initialize(G4HCofThisEvent* HCE)
{
  EvtMap = new G4THitsMap<G4double>(GetMultiFunctionalDetector()->GetName(),
                                    GetName());
  if ( HCID < 0 ) HCID = GetCollectionID(0);
  HCE->AddHitsCollection(HCID, (G4VHitsCollection*)EvtMap);
}

void G4PSFlatSurfaceFlux::EndOfEvent(G4HCofThisEvent*)
{;}

void G4PSFlatSurfaceFlux::clear(){
  EvtMap->clear();
}

void G4PSFlatSurfaceFlux::DrawAll()
{;}

void G4PSFlatSurfaceFlux::PrintAll()
{
  G4cout << " MultiFunctionalDet  " << detector->GetName() << G4endl;
  G4cout << " PrimitiveScorer" << GetName() <<G4endl; 
  G4cout << " Number of entries " << EvtMap->entries() << G4endl;
  std::map<G4int,G4double*>::iterator itr = EvtMap->GetMap()->begin();
  for(; itr != EvtMap->GetMap()->end(); itr++) {
    G4cout << "  copy no.: " << itr->first
           << "  flux  : " << *(itr->second)/GetUnitValue() 
           << " [" << GetUnit() <<"]"
           << G4endl;
  }
}

void G4PSFlatSurfaceFlux::SetUnit(const G4String& unit)
{
    if ( divideByArea ) {
        CheckAndSetUnit(unit,"Per Unit Surface");
    } else {
        if (unit == "" ){
            unitName = unit;
            unitValue = 1.0;
        }else{
            G4String msg = "Invalid unit ["+unit+"] (Current  unit is [" +GetUnit()+"] ) for " + GetName();
            G4Exception("G4PSFlatSurfaceFlux::SetUnit","DetPS0008",JustWarning,msg);
        }
    }
}

void G4PSFlatSurfaceFlux::DefineUnitAndCategory(){
   // Per Unit Surface
   new G4UnitDefinition("percentimeter2","percm2","Per Unit Surface",(1./cm2));
   new G4UnitDefinition("permillimeter2","permm2","Per Unit Surface",(1./mm2));
   new G4UnitDefinition("permeter2","perm2","Per Unit Surface",(1./m2));
}

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