Gabriele Cosmo
148 lines
4.6 KiB
C++
148 lines
4.6 KiB
C++
//
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// ********************************************************************
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// * License and Disclaimer *
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// * *
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// * The Geant4 software is copyright of the Copyright Holders of *
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// * the Geant4 Collaboration. It is provided under the terms and *
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// * conditions of the Geant4 Software License, included in the file *
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// * LICENSE and available at http://cern.ch/geant4/license . These *
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// * include a list of copyright holders. *
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// * *
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// * Neither the authors of this software system, nor their employing *
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// * institutes,nor the agencies providing financial support for this *
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// * work make any representation or warranty, express or implied, *
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// * regarding this software system or assume any liability for its *
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// * use. Please see the license in the file LICENSE and URL above *
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// * for the full disclaimer and the limitation of liability. *
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// * *
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// * This code implementation is the result of the scientific and *
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// * technical work of the GEANT4 collaboration. *
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// * By using, copying, modifying or distributing the software (or *
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// * any work based on the software) you agree to acknowledge its *
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// * use in resulting scientific publications, and indicate your *
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// * acceptance of all terms of the Geant4 Software license. *
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// ********************************************************************
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//
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//
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// $Id: G4WeightCutOffProcess.cc,v 1.9 2006/11/14 09:11:18 gcosmo Exp $
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// GEANT4 tag $Name: geant4-08-02 $
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//
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// ----------------------------------------------------------------------
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// GEANT 4 class source file
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//
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// G4WeightCutOffProcess.cc
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//
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// ----------------------------------------------------------------------
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#include "G4WeightCutOffProcess.hh"
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#include "G4VScorer.hh"
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#include "G4GeometryCellStep.hh"
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#include "G4ParallelGCellFinder.hh"
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#include "G4MassGCellFinder.hh"
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#include "G4TouchableHandle.hh"
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#include "G4VIStore.hh"
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G4WeightCutOffProcess::
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G4WeightCutOffProcess(G4double wsurvival,
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G4double wlimit,
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G4double isource,
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G4VIStore *istore,
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const G4VGCellFinder &aGCellFinder,
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const G4String &aName)
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: G4VProcess(aName),
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fParticleChange(new G4ParticleChange),
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fWeightSurvival(wsurvival),
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fWeightLimit(wlimit),
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fSourceImportance(isource),
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fIStore(istore),
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fGCellFinder(aGCellFinder)
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{
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if (!fParticleChange)
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{
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G4Exception("G4WeightCutOffProcess::G4WeightCutOffProcess()",
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"FatalError", FatalException,
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"Failed to allocate G4ParticleChange !");
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}
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G4VProcess::pParticleChange = fParticleChange;
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}
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G4WeightCutOffProcess::~G4WeightCutOffProcess()
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{
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delete fParticleChange;
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}
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G4double G4WeightCutOffProcess::
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PostStepGetPhysicalInteractionLength(const G4Track &,
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G4double, G4ForceCondition* condition)
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{
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*condition = Forced;
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return kInfinity;
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}
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G4VParticleChange *
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G4WeightCutOffProcess::PostStepDoIt(const G4Track& aTrack,
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const G4Step &aStep)
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{
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fParticleChange->Initialize(aTrack);
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G4GeometryCell postCell = fGCellFinder.GetPostGeometryCell(aStep);
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G4double R = fSourceImportance;
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if (fIStore)
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{
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G4double i = fIStore->GetImportance(postCell);
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if (i>0)
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{
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R/=i;
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}
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}
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G4double w = aTrack.GetWeight();
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if (w<R*fWeightLimit)
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{
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G4double ws = fWeightSurvival*R;
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G4double p = w/(ws);
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if (G4UniformRand()<p)
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{
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fParticleChange->ProposeTrackStatus(fStopAndKill);
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}
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else
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{
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fParticleChange->ProposeWeight(ws);
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}
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}
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return fParticleChange;
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}
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const G4String &G4WeightCutOffProcess::GetName() const
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{
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return theProcessName;
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}
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G4double G4WeightCutOffProcess::
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AlongStepGetPhysicalInteractionLength(const G4Track&,
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G4double ,
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G4double ,
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G4double& ,
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G4GPILSelection*)
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{
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return -1.0;
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}
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G4double G4WeightCutOffProcess::
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AtRestGetPhysicalInteractionLength(const G4Track& ,
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G4ForceCondition*)
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{
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return -1.0;
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}
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G4VParticleChange*
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G4WeightCutOffProcess::AtRestDoIt(const G4Track&, const G4Step&)
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{
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return 0;
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}
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G4VParticleChange*
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G4WeightCutOffProcess::AlongStepDoIt(const G4Track&, const G4Step&)
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{
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return 0;
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}
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