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G4OpBoundaryProcess.cc
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G4OpBoundaryProcess.cc
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//
// ********************************************************************
// * 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. *
// ********************************************************************
//
////////////////////////////////////////////////////////////////////////
// Optical Photon Boundary Process Class Implementation
////////////////////////////////////////////////////////////////////////
//
// File: G4OpBoundaryProcess.cc
// Description: Discrete Process -- reflection/refraction at
// optical interfaces
// Version: 1.1
// Created: 1997-06-18
// Modified: 1998-05-25 - Correct parallel component of polarization
// (thanks to: Stefano Magni + Giovanni Pieri)
// 1998-05-28 - NULL Rindex pointer before reuse
// (thanks to: Stefano Magni)
// 1998-06-11 - delete *sint1 in oblique reflection
// (thanks to: Giovanni Pieri)
// 1998-06-19 - move from GetLocalExitNormal() to the new
// method: GetLocalExitNormal(&valid) to get
// the surface normal in all cases
// 1998-11-07 - NULL OpticalSurface pointer before use
// comparison not sharp for: std::abs(cost1) < 1.0
// remove sin1, sin2 in lines 556,567
// (thanks to Stefano Magni)
// 1999-10-10 - Accommodate changes done in DoAbsorption by
// changing logic in DielectricMetal
// 2001-10-18 - avoid Linux (gcc-2.95.2) warning about variables
// might be used uninitialized in this function
// moved E2_perp, E2_parl and E2_total out of 'if'
// 2003-11-27 - Modified line 168-9 to reflect changes made to
// G4OpticalSurface class ( by Fan Lei)
// 2004-02-02 - Set theStatus = Undefined at start of DoIt
// 2005-07-28 - add G4ProcessType to constructor
// 2006-11-04 - add capability of calculating the reflectivity
// off a metal surface by way of a complex index
// of refraction - Thanks to Sehwook Lee and John
// Hauptman (Dept. of Physics - Iowa State Univ.)
// 2009-11-10 - add capability of simulating surface reflections
// with Look-Up-Tables (LUT) containing measured
// optical reflectance for a variety of surface
// treatments - Thanks to Martin Janecek and
// William Moses (Lawrence Berkeley National Lab.)
// 2013-06-01 - add the capability of simulating the transmission
// of a dichronic filter
// 2017-02-24 - add capability of simulating surface reflections
// with Look-Up-Tables (LUT) developed in DAVIS
//
// Author: Peter Gumplinger
// adopted from work by Werner Keil - April 2/96
//
////////////////////////////////////////////////////////////////////////
#include "G4OpBoundaryProcess.hh"
#include "G4ios.hh"
#include "G4GeometryTolerance.hh"
#include "G4LogicalBorderSurface.hh"
#include "G4LogicalSkinSurface.hh"
#include "G4OpProcessSubType.hh"
#include "G4OpticalParameters.hh"
#include "G4ParallelWorldProcess.hh"
#include "G4PhysicalConstants.hh"
#include "G4SystemOfUnits.hh"
#include "G4TransportationManager.hh"
#include "G4VSensitiveDetector.hh"
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
G4OpBoundaryProcess::G4OpBoundaryProcess(const G4String& processName,
G4ProcessType type)
: G4VDiscreteProcess(processName, type)
{
Initialise();
if(verboseLevel > 0)
{
G4cout << GetProcessName() << " is created " << G4endl;
}
SetProcessSubType(fOpBoundary);
fStatus = Undefined;
fModel = glisur;
fFinish = polished;
fReflectivity = 1.;
fEfficiency = 0.;
fTransmittance = 0.;
fSurfaceRoughness = 0.;
fProb_sl = 0.;
fProb_ss = 0.;
fProb_bs = 0.;
fRealRIndexMPV = nullptr;
fImagRIndexMPV = nullptr;
fMaterial1 = nullptr;
fMaterial2 = nullptr;
fOpticalSurface = nullptr;
fCarTolerance = G4GeometryTolerance::GetInstance()->GetSurfaceTolerance();
f_iTE = f_iTM = 0;
fPhotonMomentum = 0.;
fRindex1 = fRindex2 = 1.;
fSint1 = 0.;
fDichroicVector = nullptr;
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
G4OpBoundaryProcess::~G4OpBoundaryProcess() {}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
void G4OpBoundaryProcess::PreparePhysicsTable(const G4ParticleDefinition&)
{
Initialise();
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
void G4OpBoundaryProcess::Initialise()
{
G4OpticalParameters* params = G4OpticalParameters::Instance();
SetInvokeSD(params->GetBoundaryInvokeSD());
SetVerboseLevel(params->GetBoundaryVerboseLevel());
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
G4VParticleChange* G4OpBoundaryProcess::PostStepDoIt(const G4Track& aTrack,
const G4Step& aStep)
{
fStatus = Undefined;
aParticleChange.Initialize(aTrack);
aParticleChange.ProposeVelocity(aTrack.GetVelocity());
// Get hyperStep from G4ParallelWorldProcess
// NOTE: PostSetpDoIt of this process to be invoked after
// G4ParallelWorldProcess!
const G4Step* pStep = &aStep;
const G4Step* hStep = G4ParallelWorldProcess::GetHyperStep();
if(hStep != nullptr)
pStep = hStep;
if(pStep->GetPostStepPoint()->GetStepStatus() == fGeomBoundary)
{
fMaterial1 = pStep->GetPreStepPoint()->GetMaterial();
fMaterial2 = pStep->GetPostStepPoint()->GetMaterial();
}
else
{
fStatus = NotAtBoundary;
if(verboseLevel > 1)
BoundaryProcessVerbose();
return G4VDiscreteProcess::PostStepDoIt(aTrack, aStep);
}
G4VPhysicalVolume* thePrePV = pStep->GetPreStepPoint()->GetPhysicalVolume();
G4VPhysicalVolume* thePostPV = pStep->GetPostStepPoint()->GetPhysicalVolume();
if(verboseLevel > 1)
{
G4cout << " Photon at Boundary! " << G4endl;
if(thePrePV != nullptr)
G4cout << " thePrePV: " << thePrePV->GetName() << G4endl;
if(thePostPV != nullptr)
G4cout << " thePostPV: " << thePostPV->GetName() << G4endl;
}
if(aTrack.GetStepLength() <= fCarTolerance)
{
fStatus = StepTooSmall;
if(verboseLevel > 1)
BoundaryProcessVerbose();
G4MaterialPropertyVector* groupvel =
fMaterial2->GetMaterialPropertiesTable()->GetProperty(kGROUPVEL);
if(groupvel != nullptr)
{
aParticleChange.ProposeVelocity(
groupvel->Value(fPhotonMomentum, idx_groupvel));
}
return G4VDiscreteProcess::PostStepDoIt(aTrack, aStep);
}
const G4DynamicParticle* aParticle = aTrack.GetDynamicParticle();
fPhotonMomentum = aParticle->GetTotalMomentum();
fOldMomentum = aParticle->GetMomentumDirection();
fOldPolarization = aParticle->GetPolarization();
if(verboseLevel > 1)
{
G4cout << " Old Momentum Direction: " << fOldMomentum << G4endl
<< " Old Polarization: " << fOldPolarization << G4endl;
}
G4ThreeVector theGlobalPoint = pStep->GetPostStepPoint()->GetPosition();
G4bool valid;
// ID of Navigator which limits step
G4int hNavId = G4ParallelWorldProcess::GetHypNavigatorID();
auto iNav = G4TransportationManager::GetTransportationManager()
->GetActiveNavigatorsIterator();
fGlobalNormal = (iNav[hNavId])->GetGlobalExitNormal(theGlobalPoint, &valid);
if(valid)
{
fGlobalNormal = -fGlobalNormal;
}
else
{
G4ExceptionDescription ed;
ed << " G4OpBoundaryProcess/PostStepDoIt(): "
<< " The Navigator reports that it returned an invalid normal" << G4endl;
G4Exception(
"G4OpBoundaryProcess::PostStepDoIt", "OpBoun01", EventMustBeAborted, ed,
"Invalid Surface Normal - Geometry must return valid surface normal");
}
if(fOldMomentum * fGlobalNormal > 0.0)
{
#ifdef G4OPTICAL_DEBUG
G4ExceptionDescription ed;
ed << " G4OpBoundaryProcess/PostStepDoIt(): fGlobalNormal points in a "
"wrong direction. "
<< G4endl
<< " The momentum of the photon arriving at interface (oldMomentum)"
<< " must exit the volume cross in the step. " << G4endl
<< " So it MUST have dot < 0 with the normal that Exits the new "
"volume (globalNormal)."
<< G4endl << " >> The dot product of oldMomentum and global Normal is "
<< fOldMomentum * fGlobalNormal << G4endl
<< " Old Momentum (during step) = " << fOldMomentum << G4endl
<< " Global Normal (Exiting New Vol) = " << fGlobalNormal << G4endl
<< G4endl;
G4Exception("G4OpBoundaryProcess::PostStepDoIt", "OpBoun02",
EventMustBeAborted, // Or JustWarning to see if it happens
// repeatedly on one ray
ed,
"Invalid Surface Normal - Geometry must return valid surface "
"normal pointing in the right direction");
#else
fGlobalNormal = -fGlobalNormal;
#endif
}
G4MaterialPropertyVector* rIndexMPV = nullptr;
G4MaterialPropertiesTable* MPT = fMaterial1->GetMaterialPropertiesTable();
if(MPT != nullptr)
{
rIndexMPV = MPT->GetProperty(kRINDEX);
}
if(rIndexMPV != nullptr)
{
fRindex1 = rIndexMPV->Value(fPhotonMomentum, idx_rindex1);
}
else
{
fStatus = NoRINDEX;
if(verboseLevel > 1)
BoundaryProcessVerbose();
aParticleChange.ProposeLocalEnergyDeposit(fPhotonMomentum);
aParticleChange.ProposeTrackStatus(fStopAndKill);
return G4VDiscreteProcess::PostStepDoIt(aTrack, aStep);
}
fReflectivity = 1.;
fEfficiency = 0.;
fTransmittance = 0.;
fSurfaceRoughness = 0.;
fModel = glisur;
fFinish = polished;
G4SurfaceType type = dielectric_dielectric;
rIndexMPV = nullptr;
fOpticalSurface = nullptr;
G4LogicalSurface* surface =
G4LogicalBorderSurface::GetSurface(thePrePV, thePostPV);
if(surface == nullptr)
{
if(thePostPV->GetMotherLogical() == thePrePV->GetLogicalVolume())
{
surface = G4LogicalSkinSurface::GetSurface(thePostPV->GetLogicalVolume());
if(surface == nullptr)
{
surface =
G4LogicalSkinSurface::GetSurface(thePrePV->GetLogicalVolume());
}
}
else
{
surface = G4LogicalSkinSurface::GetSurface(thePrePV->GetLogicalVolume());
if(surface == nullptr)
{
surface =
G4LogicalSkinSurface::GetSurface(thePostPV->GetLogicalVolume());
}
}
}
if(surface != nullptr)
{
fOpticalSurface =
dynamic_cast<G4OpticalSurface*>(surface->GetSurfaceProperty());
}
if(fOpticalSurface != nullptr)
{
type = fOpticalSurface->GetType();
fModel = fOpticalSurface->GetModel();
fFinish = fOpticalSurface->GetFinish();
G4MaterialPropertiesTable* sMPT =
fOpticalSurface->GetMaterialPropertiesTable();
if(sMPT != nullptr)
{
if(fFinish == polishedbackpainted || fFinish == groundbackpainted)
{
rIndexMPV = sMPT->GetProperty(kRINDEX);
if(rIndexMPV != nullptr)
{
fRindex2 = rIndexMPV->Value(fPhotonMomentum, idx_rindex_surface);
}
else
{
fStatus = NoRINDEX;
if(verboseLevel > 1)
BoundaryProcessVerbose();
aParticleChange.ProposeLocalEnergyDeposit(fPhotonMomentum);
aParticleChange.ProposeTrackStatus(fStopAndKill);
return G4VDiscreteProcess::PostStepDoIt(aTrack, aStep);
}
}
fRealRIndexMPV = sMPT->GetProperty(kREALRINDEX);
fImagRIndexMPV = sMPT->GetProperty(kIMAGINARYRINDEX);
f_iTE = f_iTM = 1;
G4MaterialPropertyVector* pp;
if((pp = sMPT->GetProperty(kREFLECTIVITY)))
{
fReflectivity = pp->Value(fPhotonMomentum, idx_reflect);
}
else if(fRealRIndexMPV && fImagRIndexMPV)
{
CalculateReflectivity();
}
if((pp = sMPT->GetProperty(kEFFICIENCY)))
{
fEfficiency = pp->Value(fPhotonMomentum, idx_eff);
}
if((pp = sMPT->GetProperty(kTRANSMITTANCE)))
{
fTransmittance = pp->Value(fPhotonMomentum, idx_trans);
}
if(sMPT->ConstPropertyExists(kSURFACEROUGHNESS))
{
fSurfaceRoughness = sMPT->GetConstProperty(kSURFACEROUGHNESS);
}
if(fModel == unified)
{
fProb_sl = (pp = sMPT->GetProperty(kSPECULARLOBECONSTANT))
? pp->Value(fPhotonMomentum, idx_lobe)
: 0.;
fProb_ss = (pp = sMPT->GetProperty(kSPECULARSPIKECONSTANT))
? pp->Value(fPhotonMomentum, idx_spike)
: 0.;
fProb_bs = (pp = sMPT->GetProperty(kBACKSCATTERCONSTANT))
? pp->Value(fPhotonMomentum, idx_back)
: 0.;
}
} // end of if(sMPT)
else if(fFinish == polishedbackpainted || fFinish == groundbackpainted)
{
aParticleChange.ProposeLocalEnergyDeposit(fPhotonMomentum);
aParticleChange.ProposeTrackStatus(fStopAndKill);
return G4VDiscreteProcess::PostStepDoIt(aTrack, aStep);
}
} // end of if(fOpticalSurface)
// DIELECTRIC-DIELECTRIC
if(type == dielectric_dielectric)
{
if(fFinish == polished || fFinish == ground)
{
if(fMaterial1 == fMaterial2)
{
fStatus = SameMaterial;
if(verboseLevel > 1)
BoundaryProcessVerbose();
return G4VDiscreteProcess::PostStepDoIt(aTrack, aStep);
}
MPT = fMaterial2->GetMaterialPropertiesTable();
if(MPT != nullptr)
{
rIndexMPV = MPT->GetProperty(kRINDEX);
}
if(rIndexMPV != nullptr)
{
fRindex2 = rIndexMPV->Value(fPhotonMomentum, idx_rindex2);
}
else
{
fStatus = NoRINDEX;
if(verboseLevel > 1)
BoundaryProcessVerbose();
aParticleChange.ProposeLocalEnergyDeposit(fPhotonMomentum);
aParticleChange.ProposeTrackStatus(fStopAndKill);
return G4VDiscreteProcess::PostStepDoIt(aTrack, aStep);
}
}
if(fFinish == polishedbackpainted || fFinish == groundbackpainted)
{
DielectricDielectric();
}
else
{
G4double rand = G4UniformRand();
if(rand > fReflectivity + fTransmittance)
{
DoAbsorption();
}
else if(rand > fReflectivity)
{
fStatus = Transmission;
fNewMomentum = fOldMomentum;
fNewPolarization = fOldPolarization;
}
else
{
if(fFinish == polishedfrontpainted)
{
DoReflection();
}
else if(fFinish == groundfrontpainted)
{
fStatus = LambertianReflection;
DoReflection();
}
else
{
DielectricDielectric();
}
}
}
}
else if(type == dielectric_metal)
{
DielectricMetal();
}
else if(type == dielectric_LUT)
{
DielectricLUT();
}
else if(type == dielectric_LUTDAVIS)
{
DielectricLUTDAVIS();
}
else if(type == dielectric_dichroic)
{
DielectricDichroic();
}
else
{
G4ExceptionDescription ed;
ed << " PostStepDoIt(): Illegal boundary type." << G4endl;
G4Exception("G4OpBoundaryProcess", "OpBoun04", JustWarning, ed);
return G4VDiscreteProcess::PostStepDoIt(aTrack, aStep);
}
fNewMomentum = fNewMomentum.unit();
fNewPolarization = fNewPolarization.unit();
if(verboseLevel > 1)
{
G4cout << " New Momentum Direction: " << fNewMomentum << G4endl
<< " New Polarization: " << fNewPolarization << G4endl;
BoundaryProcessVerbose();
}
aParticleChange.ProposeMomentumDirection(fNewMomentum);
aParticleChange.ProposePolarization(fNewPolarization);
if(fStatus == FresnelRefraction || fStatus == Transmission)
{
G4MaterialPropertyVector* groupvel =
fMaterial2->GetMaterialPropertiesTable()->GetProperty(kGROUPVEL);
if(groupvel != nullptr)
{
aParticleChange.ProposeVelocity(
groupvel->Value(fPhotonMomentum, idx_groupvel));
}
}
if(fStatus == Detection && fInvokeSD)
InvokeSD(pStep);
return G4VDiscreteProcess::PostStepDoIt(aTrack, aStep);
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
void G4OpBoundaryProcess::BoundaryProcessVerbose() const
{
G4cout << " *** ";
if(fStatus == Undefined)
G4cout << "Undefined";
else if(fStatus == Transmission)
G4cout << "Transmission";
else if(fStatus == FresnelRefraction)
G4cout << "FresnelRefraction";
else if(fStatus == FresnelReflection)
G4cout << "FresnelReflection";
else if(fStatus == TotalInternalReflection)
G4cout << "TotalInternalReflection";
else if(fStatus == LambertianReflection)
G4cout << "LambertianReflection";
else if(fStatus == LobeReflection)
G4cout << "LobeReflection";
else if(fStatus == SpikeReflection)
G4cout << "SpikeReflection";
else if(fStatus == BackScattering)
G4cout << "BackScattering";
else if(fStatus == PolishedLumirrorAirReflection)
G4cout << "PolishedLumirrorAirReflection";
else if(fStatus == PolishedLumirrorGlueReflection)
G4cout << "PolishedLumirrorGlueReflection";
else if(fStatus == PolishedAirReflection)
G4cout << "PolishedAirReflection";
else if(fStatus == PolishedTeflonAirReflection)
G4cout << "PolishedTeflonAirReflection";
else if(fStatus == PolishedTiOAirReflection)
G4cout << "PolishedTiOAirReflection";
else if(fStatus == PolishedTyvekAirReflection)
G4cout << "PolishedTyvekAirReflection";
else if(fStatus == PolishedVM2000AirReflection)
G4cout << "PolishedVM2000AirReflection";
else if(fStatus == PolishedVM2000GlueReflection)
G4cout << "PolishedVM2000GlueReflection";
else if(fStatus == EtchedLumirrorAirReflection)
G4cout << "EtchedLumirrorAirReflection";
else if(fStatus == EtchedLumirrorGlueReflection)
G4cout << "EtchedLumirrorGlueReflection";
else if(fStatus == EtchedAirReflection)
G4cout << "EtchedAirReflection";
else if(fStatus == EtchedTeflonAirReflection)
G4cout << "EtchedTeflonAirReflection";
else if(fStatus == EtchedTiOAirReflection)
G4cout << "EtchedTiOAirReflection";
else if(fStatus == EtchedTyvekAirReflection)
G4cout << "EtchedTyvekAirReflection";
else if(fStatus == EtchedVM2000AirReflection)
G4cout << "EtchedVM2000AirReflection";
else if(fStatus == EtchedVM2000GlueReflection)
G4cout << "EtchedVM2000GlueReflection";
else if(fStatus == GroundLumirrorAirReflection)
G4cout << "GroundLumirrorAirReflection";
else if(fStatus == GroundLumirrorGlueReflection)
G4cout << "GroundLumirrorGlueReflection";
else if(fStatus == GroundAirReflection)
G4cout << "GroundAirReflection";
else if(fStatus == GroundTeflonAirReflection)
G4cout << "GroundTeflonAirReflection";
else if(fStatus == GroundTiOAirReflection)
G4cout << "GroundTiOAirReflection";
else if(fStatus == GroundTyvekAirReflection)
G4cout << "GroundTyvekAirReflection";
else if(fStatus == GroundVM2000AirReflection)
G4cout << "GroundVM2000AirReflection";
else if(fStatus == GroundVM2000GlueReflection)
G4cout << "GroundVM2000GlueReflection";
else if(fStatus == Absorption)
G4cout << "Absorption";
else if(fStatus == Detection)
G4cout << "Detection";
else if(fStatus == NotAtBoundary)
G4cout << "NotAtBoundary";
else if(fStatus == SameMaterial)
G4cout << "SameMaterial";
else if(fStatus == StepTooSmall)
G4cout << "StepTooSmall";
else if(fStatus == NoRINDEX)
G4cout << "NoRINDEX";
else if(fStatus == Dichroic)
G4cout << "Dichroic Transmission";
G4cout << " ***" << G4endl;
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
G4ThreeVector G4OpBoundaryProcess::GetFacetNormal(
const G4ThreeVector& momentum, const G4ThreeVector& normal) const
{
G4ThreeVector facetNormal;
if(fModel == unified || fModel == LUT || fModel == DAVIS)
{
/* This function codes alpha to a random value taken from the
distribution p(alpha) = g(alpha; 0, sigma_alpha)*std::sin(alpha),
for alpha > 0 and alpha < 90, where g(alpha; 0, sigma_alpha) is a
gaussian distribution with mean 0 and standard deviation sigma_alpha. */
G4double sigma_alpha = 0.0;
if(fOpticalSurface)
sigma_alpha = fOpticalSurface->GetSigmaAlpha();
if(sigma_alpha == 0.0)
{
return normal;
}
G4double f_max = std::min(1.0, 4. * sigma_alpha);
G4double alpha, phi, sinAlpha;
do
{ // Loop checking, 13-Aug-2015, Peter Gumplinger
do
{ // Loop checking, 13-Aug-2015, Peter Gumplinger
alpha = G4RandGauss::shoot(0.0, sigma_alpha);
sinAlpha = std::sin(alpha);
} while(G4UniformRand() * f_max > sinAlpha || alpha >= halfpi);
phi = G4UniformRand() * twopi;
facetNormal.set(sinAlpha * std::cos(phi), sinAlpha * std::sin(phi),
std::cos(alpha));
facetNormal.rotateUz(normal);
} while(momentum * facetNormal >= 0.0);
}
else
{
G4double polish = 1.0;
if(fOpticalSurface)
polish = fOpticalSurface->GetPolish();
if(polish < 1.0)
{
do
{ // Loop checking, 13-Aug-2015, Peter Gumplinger
G4ThreeVector smear;
do
{ // Loop checking, 13-Aug-2015, Peter Gumplinger
smear.setX(2. * G4UniformRand() - 1.);
smear.setY(2. * G4UniformRand() - 1.);
smear.setZ(2. * G4UniformRand() - 1.);
} while(smear.mag2() > 1.0);
facetNormal = normal + (1. - polish) * smear;
} while(momentum * facetNormal >= 0.0);
facetNormal = facetNormal.unit();
}
else
{
facetNormal = normal;
}
}
return facetNormal;
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
void G4OpBoundaryProcess::DielectricMetal()
{
G4int n = 0;
G4double rand;
G4ThreeVector A_trans;
do
{
++n;
rand = G4UniformRand();
if(rand > fReflectivity && n == 1)
{
if(rand > fReflectivity + fTransmittance)
{
DoAbsorption();
}
else
{
fStatus = Transmission;
fNewMomentum = fOldMomentum;
fNewPolarization = fOldPolarization;
}
break;
}
else
{
if(fRealRIndexMPV && fImagRIndexMPV)
{
if(n > 1)
{
CalculateReflectivity();
if(!G4BooleanRand(fReflectivity))
{
DoAbsorption();
break;
}
}
}
if(fModel == glisur || fFinish == polished)
{
DoReflection();
}
else
{
if(n == 1)
ChooseReflection();
if(fStatus == LambertianReflection)
{
DoReflection();
}
else if(fStatus == BackScattering)
{
fNewMomentum = -fOldMomentum;
fNewPolarization = -fOldPolarization;
}
else
{
if(fStatus == LobeReflection)
{
if(!fRealRIndexMPV || !fImagRIndexMPV)
{
fFacetNormal = GetFacetNormal(fOldMomentum, fGlobalNormal);
}
//else
// case of complex rindex needs to be implemented
}
fNewMomentum =
fOldMomentum - 2. * fOldMomentum * fFacetNormal * fFacetNormal;
if(f_iTE > 0 && f_iTM > 0)
{
fNewPolarization =
-fOldPolarization +
(2. * fOldPolarization * fFacetNormal * fFacetNormal);
}
else if(f_iTE > 0)
{
A_trans = (fSint1 > 0.0) ? fOldMomentum.cross(fFacetNormal).unit()
: fOldPolarization;
fNewPolarization = -A_trans;
}
else if(f_iTM > 0)
{
fNewPolarization =
-fNewMomentum.cross(A_trans).unit(); // = -A_paral
}
}
}
fOldMomentum = fNewMomentum;
fOldPolarization = fNewPolarization;
}
// Loop checking, 13-Aug-2015, Peter Gumplinger
} while(fNewMomentum * fGlobalNormal < 0.0);
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
void G4OpBoundaryProcess::DielectricLUT()
{
G4int thetaIndex, phiIndex;
G4double angularDistVal, thetaRad, phiRad;
G4ThreeVector perpVectorTheta, perpVectorPhi;
fStatus = G4OpBoundaryProcessStatus(
G4int(fFinish) + (G4int(NoRINDEX) - G4int(groundbackpainted)));
G4int thetaIndexMax = fOpticalSurface->GetThetaIndexMax();
G4int phiIndexMax = fOpticalSurface->GetPhiIndexMax();
G4double rand;
do
{
rand = G4UniformRand();
if(rand > fReflectivity)
{
if(rand > fReflectivity + fTransmittance)
{
DoAbsorption();
}
else
{
fStatus = Transmission;
fNewMomentum = fOldMomentum;
fNewPolarization = fOldPolarization;
}
break;
}
else
{
// Calculate Angle between Normal and Photon Momentum
G4double anglePhotonToNormal = fOldMomentum.angle(-fGlobalNormal);
// Round to closest integer: LBNL model array has 91 values
G4int angleIncident = G4lrint(anglePhotonToNormal / CLHEP::deg);
// Take random angles THETA and PHI,
// and see if below Probability - if not - Redo
do
{
thetaIndex = G4RandFlat::shootInt(thetaIndexMax - 1);
phiIndex = G4RandFlat::shootInt(phiIndexMax - 1);
// Find probability with the new indeces from LUT
angularDistVal = fOpticalSurface->GetAngularDistributionValue(
angleIncident, thetaIndex, phiIndex);
// Loop checking, 13-Aug-2015, Peter Gumplinger
} while(!G4BooleanRand(angularDistVal));
thetaRad = G4double(-90 + 4 * thetaIndex) * pi / 180.;
phiRad = G4double(-90 + 5 * phiIndex) * pi / 180.;
// Rotate Photon Momentum in Theta, then in Phi
fNewMomentum = -fOldMomentum;
perpVectorTheta = fNewMomentum.cross(fGlobalNormal);
if(perpVectorTheta.mag() < fCarTolerance)
{
perpVectorTheta = fNewMomentum.orthogonal();
}
fNewMomentum =
fNewMomentum.rotate(anglePhotonToNormal - thetaRad, perpVectorTheta);
perpVectorPhi = perpVectorTheta.cross(fNewMomentum);
fNewMomentum = fNewMomentum.rotate(-phiRad, perpVectorPhi);
// Rotate Polarization too:
fFacetNormal = (fNewMomentum - fOldMomentum).unit();
fNewPolarization = -fOldPolarization +
(2. * fOldPolarization * fFacetNormal * fFacetNormal);
}
// Loop checking, 13-Aug-2015, Peter Gumplinger
} while(fNewMomentum * fGlobalNormal <= 0.0);
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
void G4OpBoundaryProcess::DielectricLUTDAVIS()
{
G4int angindex, random, angleIncident;
G4double reflectivityValue, elevation, azimuth;
G4double anglePhotonToNormal;
G4int lutbin = fOpticalSurface->GetLUTbins();
G4double rand = G4UniformRand();
G4double sinEl;
G4ThreeVector u, vNorm, w;
do
{
anglePhotonToNormal = fOldMomentum.angle(-fGlobalNormal);
// Davis model has 90 reflection bins: round down
angleIncident = G4lint(anglePhotonToNormal / CLHEP::deg);
reflectivityValue = fOpticalSurface->GetReflectivityLUTValue(angleIncident);
if(rand > reflectivityValue)
{
if(fEfficiency > 0.)
{
DoAbsorption();
break;
}
else
{
fStatus = Transmission;
if(angleIncident <= 0.01)
{
fNewMomentum = fOldMomentum;
break;
}
do
{
random = G4RandFlat::shootInt(1, lutbin + 1);
angindex =
(((random * 2) - 1)) + angleIncident * lutbin * 2 + 3640000;
azimuth =
fOpticalSurface->GetAngularDistributionValueLUT(angindex - 1);
elevation = fOpticalSurface->GetAngularDistributionValueLUT(angindex);
} while(elevation == 0. && azimuth == 0.);
sinEl = std::sin(elevation);
vNorm = (fGlobalNormal.cross(fOldMomentum)).unit();
u = vNorm.cross(fGlobalNormal) * (sinEl * std::cos(azimuth));
vNorm *= (sinEl * std::sin(azimuth));
// fGlobalNormal shouldn't be modified here
w = (fGlobalNormal *= std::cos(elevation));
fNewMomentum = u + vNorm + w;
// Rotate Polarization too:
fFacetNormal = (fNewMomentum - fOldMomentum).unit();
fNewPolarization = -fOldPolarization + (2. * fOldPolarization *
fFacetNormal * fFacetNormal);
}
}
else
{
fStatus = LobeReflection;
if(angleIncident == 0)
{
fNewMomentum = -fOldMomentum;
break;
}
do
{
random = G4RandFlat::shootInt(1, lutbin + 1);
angindex = (((random * 2) - 1)) + (angleIncident - 1) * lutbin * 2;
azimuth = fOpticalSurface->GetAngularDistributionValueLUT(angindex - 1);
elevation = fOpticalSurface->GetAngularDistributionValueLUT(angindex);
} while(elevation == 0. && azimuth == 0.);
sinEl = std::sin(elevation);
vNorm = (fGlobalNormal.cross(fOldMomentum)).unit();
u = vNorm.cross(fGlobalNormal) * (sinEl * std::cos(azimuth));
vNorm *= (sinEl * std::sin(azimuth));
// fGlobalNormal shouldn't be modified here
w = (fGlobalNormal *= std::cos(elevation));
fNewMomentum = u + vNorm + w;
// Rotate Polarization too: (needs revision)
fNewPolarization = fOldPolarization;
}
} while(fNewMomentum * fGlobalNormal <= 0.0);
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
void G4OpBoundaryProcess::DielectricDichroic()
{
// Calculate Angle between Normal and Photon Momentum
G4double anglePhotonToNormal = fOldMomentum.angle(-fGlobalNormal);
// Round it to closest integer
G4double angleIncident = std::floor(180. / pi * anglePhotonToNormal + 0.5);
if(!fDichroicVector)
{
if(fOpticalSurface)
fDichroicVector = fOpticalSurface->GetDichroicVector();
}
if(fDichroicVector)
{
G4double wavelength = h_Planck * c_light / fPhotonMomentum;
fTransmittance = fDichroicVector->Value(wavelength / nm, angleIncident,
idx_dichroicX, idx_dichroicY) *
perCent;
// G4cout << "wavelength: " << std::floor(wavelength/nm)
// << "nm" << G4endl;
// G4cout << "Incident angle: " << angleIncident << "deg" << G4endl;
// G4cout << "Transmittance: "
// << std::floor(fTransmittance/perCent) << "%" << G4endl;
}
else
{
G4ExceptionDescription ed;
ed << " G4OpBoundaryProcess/DielectricDichroic(): "
<< " The dichroic surface has no G4Physics2DVector" << G4endl;
G4Exception("G4OpBoundaryProcess::DielectricDichroic", "OpBoun03",
FatalException, ed,
"A dichroic surface must have an associated G4Physics2DVector");
}
if(!G4BooleanRand(fTransmittance))
{ // Not transmitted, so reflect
if(fModel == glisur || fFinish == polished)
{
DoReflection();
}
else
{
ChooseReflection();
if(fStatus == LambertianReflection)
{
DoReflection();
}
else if(fStatus == BackScattering)
{
fNewMomentum = -fOldMomentum;
fNewPolarization = -fOldPolarization;
}
else
{
G4double PdotN, EdotN;
do
{
if(fStatus == LobeReflection)
{