source: trunk/source/digits_hits/scorer/src/G4PSSphereSurfaceFlux.cc@ 834

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// $Id: G4PSSphereSurfaceFlux.cc,v 1.1 2007/07/11 01:31:03 asaim Exp $
// GEANT4 tag $Name:  $
//
// G4PSSphereSurfaceFlux
#include "G4PSSphereSurfaceFlux.hh"
#include "G4StepStatus.hh"
#include "G4Track.hh"
#include "G4UnitsTable.hh"
#include "G4GeometryTolerance.hh"
////////////////////////////////////////////////////////////////////////////////
// (Description)
//   This is a primitive scorer class for scoring only Surface Flux.
//  Flux version assumes only for G4Sphere shape. 
//
// Surface is defined  at the inside of sphere.
// Direction                  -Rmin   +Rmax
//   0  IN || OUT            ->|<-     |
//   1  IN                   ->|       |
//   2  OUT                    |<-     |
//
// Created: 2005-11-14  Tsukasa ASO, Akinori Kimura.
// 29-Mar-2007  T.Aso,  Bug fix for momentum direction at outgoing flux.
// 
///////////////////////////////////////////////////////////////////////////////

G4PSSphereSurfaceFlux::G4PSSphereSurfaceFlux(G4String name, 
                                         G4int direction, G4int depth)
  :G4VPrimitiveScorer(name,depth),HCID(-1),fDirection(direction)
{;}

G4PSSphereSurfaceFlux::~G4PSSphereSurfaceFlux()
{;}

G4bool G4PSSphereSurfaceFlux::ProcessHits(G4Step* aStep,G4TouchableHistory*)
{
  G4StepPoint* preStep = aStep->GetPreStepPoint();
  G4VSolid * solid = 
    preStep->GetPhysicalVolume()->GetLogicalVolume()->GetSolid();
  if( solid->GetEntityType() != "G4Sphere" ){
    G4Exception("G4PSSphereSurfaceFluxScorer. - Solid type is not supported.");
    return FALSE;
  }
  G4Sphere* sphereSolid = (G4Sphere*)(solid);

  G4int dirFlag =IsSelectedSurface(aStep,sphereSolid);
  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->GetPreStepPoint();
      }else{
        return FALSE;
      }

      G4TouchableHandle theTouchable = thisStep->GetTouchableHandle();
      G4ThreeVector pdirection = thisStep->GetMomentumDirection();
      G4ThreeVector localdir  = 
        theTouchable->GetHistory()->GetTopTransform().TransformAxis(pdirection);
      G4double localdirL2 = localdir.x()*localdir.x()
        +localdir.y()*localdir.y()
        +localdir.z()*localdir.z();
      G4ThreeVector stppos1= aStep->GetPreStepPoint()->GetPosition();
      G4ThreeVector localpos1 = 
        theTouchable->GetHistory()->GetTopTransform().TransformPoint(stppos1);
      G4double localR2 = localpos1.x()*localpos1.x()
        +localpos1.y()*localpos1.y()
        +localpos1.z()*localpos1.z();
      G4double anglefactor = (localdir.x()*localpos1.x()
                              +localdir.y()*localpos1.y()
                              +localdir.z()*localpos1.z())
        /std::sqrt(localdirL2)/std::sqrt(localR2);

      G4double radi   = sphereSolid->GetInsideRadius();
      G4double dph    = sphereSolid->GetDeltaPhiAngle()/radian;
      G4double stth   = sphereSolid->GetStartThetaAngle()/radian;
      G4double enth   = stth+sphereSolid->GetDeltaThetaAngle()/radian;
      G4double square = radi*radi*dph*( -std::cos(enth) + std::cos(stth) );

      G4double current = thisStep->GetWeight(); // Flux (Particle Weight)
      current = current/square;  // Flux with angle.

      current /= anglefactor;

      G4int index = GetIndex(aStep);
      EvtMap->add(index,current);
    }
  }

  return TRUE;
}

G4int G4PSSphereSurfaceFlux::IsSelectedSurface(G4Step* aStep, G4Sphere* sphereSolid){

  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);
    G4double localR2 = localpos1.x()*localpos1.x()
                      +localpos1.y()*localpos1.y()
                      +localpos1.z()*localpos1.z();
    G4double InsideRadius2 = 
      sphereSolid->GetInsideRadius()*sphereSolid->GetInsideRadius();
    if(std::fabs( localR2 - InsideRadius2 ) < kCarTolerance ){
      return fFlux_In;
    }
  }

  if (aStep->GetPostStepPoint()->GetStepStatus() == fGeomBoundary ){
    // Exiting Geometry
    G4ThreeVector stppos2= aStep->GetPostStepPoint()->GetPosition();
    G4ThreeVector localpos2 = 
      theTouchable->GetHistory()->GetTopTransform().TransformPoint(stppos2);
    G4double localR2 = localpos2.x()*localpos2.x()
                      +localpos2.y()*localpos2.y()
                      +localpos2.z()*localpos2.z();
    G4double InsideRadius2 = 
      sphereSolid->GetInsideRadius()*sphereSolid->GetInsideRadius();
    if(std::fabs( localR2 - InsideRadius2 ) < kCarTolerance ){
      return fFlux_Out;
    }
  }

  return -1;
}

void G4PSSphereSurfaceFlux::Initialize(G4HCofThisEvent* HCE)
{
  EvtMap = new G4THitsMap<G4double>(detector->GetName(), GetName());
  if ( HCID < 0 ) HCID = GetCollectionID(0);
  HCE->AddHitsCollection(HCID, (G4VHitsCollection*)EvtMap);
}

void G4PSSphereSurfaceFlux::EndOfEvent(G4HCofThisEvent*)
{;}

void G4PSSphereSurfaceFlux::clear(){
  EvtMap->clear();
}

void G4PSSphereSurfaceFlux::DrawAll()
{;}

void G4PSSphereSurfaceFlux::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
           << "  current  : " << *(itr->second)
           << G4endl;
  }
}