Gabriele Cosmo
428 lines
16 KiB
C++
428 lines
16 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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// class G4RegularNavigation implementation
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//
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// Author: Pedro Arce, May 2007
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//
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// --------------------------------------------------------------------
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#include "G4RegularNavigation.hh"
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#include "G4TouchableHistory.hh"
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#include "G4PhantomParameterisation.hh"
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#include "G4Material.hh"
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#include "G4NormalNavigation.hh"
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#include "G4Navigator.hh"
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#include "G4GeometryTolerance.hh"
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#include "G4RegularNavigationHelper.hh"
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//------------------------------------------------------------------
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G4RegularNavigation::G4RegularNavigation()
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{
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kCarTolerance = G4GeometryTolerance::GetInstance()->GetSurfaceTolerance();
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fMinStep = 101*kCarTolerance;
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}
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//------------------------------------------------------------------
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G4RegularNavigation::~G4RegularNavigation()
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{
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}
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//------------------------------------------------------------------
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G4double G4RegularNavigation::
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ComputeStep(const G4ThreeVector& localPoint,
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const G4ThreeVector& localDirection,
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const G4double currentProposedStepLength,
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G4double& newSafety,
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G4NavigationHistory& history,
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G4bool& validExitNormal,
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G4ThreeVector& exitNormal,
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G4bool& exiting,
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G4bool& entering,
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G4VPhysicalVolume *(*pBlockedPhysical),
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G4int& blockedReplicaNo)
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{
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// This method is never called because to be called the daughter has to be
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// a regular structure. This would only happen if the track is in the mother
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// of voxels volume. But the voxels fill completely their mother, so when a
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// track enters the mother it automatically enters a voxel. Only precision
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// problems would make this method to be called
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G4ThreeVector globalPoint =
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history.GetTopTransform().InverseTransformPoint(localPoint);
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G4ThreeVector globalDirection =
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history.GetTopTransform().InverseTransformAxis(localDirection);
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G4ThreeVector localPoint2 = localPoint; // take away constantness
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LevelLocate( history, *pBlockedPhysical, blockedReplicaNo,
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globalPoint, &globalDirection, true, localPoint2 );
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// Get in which voxel it is
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//
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G4VPhysicalVolume *motherPhysical, *daughterPhysical;
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G4LogicalVolume *motherLogical;
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motherPhysical = history.GetTopVolume();
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motherLogical = motherPhysical->GetLogicalVolume();
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daughterPhysical = motherLogical->GetDaughter(0);
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G4PhantomParameterisation * daughterParam =
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(G4PhantomParameterisation*)(daughterPhysical->GetParameterisation());
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G4int copyNo = daughterParam ->GetReplicaNo(localPoint,localDirection);
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G4ThreeVector voxelTranslation = daughterParam->GetTranslation( copyNo );
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G4ThreeVector daughterPoint = localPoint - voxelTranslation;
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// Compute step in voxel
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//
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return fnormalNav->ComputeStep(daughterPoint,
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localDirection,
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currentProposedStepLength,
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newSafety,
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history,
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validExitNormal,
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exitNormal,
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exiting,
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entering,
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pBlockedPhysical,
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blockedReplicaNo);
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}
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//------------------------------------------------------------------
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G4double G4RegularNavigation::ComputeStepSkippingEqualMaterials(
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G4ThreeVector& localPoint,
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const G4ThreeVector& localDirection,
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const G4double currentProposedStepLength,
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G4double& newSafety,
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G4NavigationHistory& history,
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G4bool& validExitNormal,
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G4ThreeVector& exitNormal,
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G4bool& exiting,
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G4bool& entering,
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G4VPhysicalVolume *(*pBlockedPhysical),
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G4int& blockedReplicaNo,
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G4VPhysicalVolume* pCurrentPhysical)
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{
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G4RegularNavigationHelper::Instance()->ClearStepLengths();
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G4PhantomParameterisation *param =
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(G4PhantomParameterisation*)(pCurrentPhysical->GetParameterisation());
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if( !param->SkipEqualMaterials() )
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{
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return fnormalNav->ComputeStep(localPoint,
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localDirection,
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currentProposedStepLength,
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newSafety,
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history,
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validExitNormal,
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exitNormal,
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exiting,
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entering,
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pBlockedPhysical,
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blockedReplicaNo);
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}
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G4double ourStep = 0.;
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// To get replica No: transform local point to the reference system of the
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// param container volume
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//
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G4int ide = history.GetDepth();
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G4ThreeVector containerPoint = history.GetTransform(ide)
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.InverseTransformPoint(localPoint);
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// Point in global frame
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//
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containerPoint = history.GetTransform(ide).InverseTransformPoint(localPoint);
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// Point in voxel parent volume frame
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//
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containerPoint = history.GetTransform(ide-1).TransformPoint(containerPoint);
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// Store previous voxel translation to move localPoint by the difference
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// with the new one
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//
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G4ThreeVector prevVoxelTranslation = containerPoint - localPoint;
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// Do not use the expression below: There are cases where the
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// fLastLocatedPointLocal does not give the correct answer
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// (particle reaching a wall and bounced back, particle travelling through
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// the wall that is deviated in an step, ...; these are pathological cases
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// that give wrong answers in G4PhantomParameterisation::GetReplicaNo()
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//
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// G4ThreeVector prevVoxelTranslation = param->GetTranslation( copyNo );
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G4int copyNo = param->GetReplicaNo(containerPoint,localDirection);
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G4Material* currentMate = param->ComputeMaterial( copyNo, nullptr, nullptr );
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G4VSolid* voxelBox = pCurrentPhysical->GetLogicalVolume()->GetSolid();
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G4VSolid* containerSolid = param->GetContainerSolid();
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G4Material* nextMate;
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G4bool bFirstStep = true;
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G4double newStep;
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G4double totalNewStep = 0.;
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// Loop while same material is found
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//
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//
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fNumberZeroSteps = 0;
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for( G4int ii = 0; ii < fNoStepsAllowed+1; ++ii )
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{
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if( ii == fNoStepsAllowed ) {
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// Must kill this stuck track
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//
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G4ThreeVector pGlobalpoint = history.GetTransform(ide)
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.InverseTransformPoint(localPoint);
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std::ostringstream message;
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message << "G4RegularNavigation::ComputeStepSkippingEqualMaterials()"
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<< "Stuck Track: potential geometry or navigation problem."
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<< G4endl
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<< " Track stuck, moving for more than "
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<< ii << " steps" << G4endl
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<< "- at point " << pGlobalpoint << G4endl
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<< " local direction: " << localDirection << G4endl;
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G4Exception("G4RegularNavigation::ComputeStepSkippingEqualMaterials()",
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"GeomRegNav1001",
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EventMustBeAborted,
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message);
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}
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newStep = voxelBox->DistanceToOut( localPoint, localDirection );
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fLastStepWasZero = (newStep<fMinStep);
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if( fLastStepWasZero )
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{
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++fNumberZeroSteps;
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#ifdef G4DEBUG_NAVIGATION
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if( fNumberZeroSteps > 1 )
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{
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G4ThreeVector pGlobalpoint = history.GetTransform(ide)
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.InverseTransformPoint(localPoint);
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std::ostringstream message;
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message.precision(16);
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message << "G4RegularNavigation::ComputeStepSkippingEqualMaterials(): another 'zero' step, # "
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<< fNumberZeroSteps
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<< ", at " << pGlobalpoint
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<< ", nav-comp-step calls # " << ii
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<< ", Step= " << newStep;
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G4Exception("G4RegularNavigation::ComputeStepSkippingEqualMaterials()",
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"GeomRegNav1002", JustWarning, message,
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"Potential overlap in geometry!");
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}
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#endif
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if( fNumberZeroSteps > fActionThreshold_NoZeroSteps-1 )
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{
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// Act to recover this stuck track. Pushing it along direction
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//
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newStep = std::min(101*kCarTolerance*std::pow(10,fNumberZeroSteps-2),0.1);
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#ifdef G4DEBUG_NAVIGATION
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G4ThreeVector pGlobalpoint = history.GetTransform(ide)
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.InverseTransformPoint(localPoint);
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std::ostringstream message;
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message.precision(16);
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message << "Track stuck or not moving." << G4endl
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<< " Track stuck, not moving for "
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<< fNumberZeroSteps << " steps" << G4endl
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<< "- at point " << pGlobalpoint
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<< " (local point " << localPoint << ")" << G4endl
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<< " local direction: " << localDirection
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<< " Potential geometry or navigation problem !"
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<< G4endl
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<< " Trying pushing it of " << newStep << " mm ...";
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G4Exception("G4RegularNavigation::ComputeStepSkippingEqualMaterials()",
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"GeomRegNav1003", JustWarning, message,
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"Potential overlap in geometry!");
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#endif
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}
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if( fNumberZeroSteps > fAbandonThreshold_NoZeroSteps-1 )
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{
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// Must kill this stuck track
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//
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G4ThreeVector pGlobalpoint = history.GetTransform(ide)
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.InverseTransformPoint(localPoint);
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std::ostringstream message;
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message << "G4RegularNavigation::ComputeStepSkippingEqualMaterials()"
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<< "Stuck Track: potential geometry or navigation problem."
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<< G4endl
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<< " Track stuck, not moving for "
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<< fNumberZeroSteps << " steps" << G4endl
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<< "- at point " << pGlobalpoint << G4endl
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<< " local direction: " << localDirection << G4endl;
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G4Exception("G4RegularNavigation::ComputeStepSkippingEqualMaterials()",
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"GeomRegNav1004",
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EventMustBeAborted,
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message);
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}
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}
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if( (bFirstStep) && (newStep < currentProposedStepLength) )
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{
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exiting = true;
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}
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bFirstStep = false;
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newStep += kCarTolerance; // Avoid precision problems
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ourStep += newStep;
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totalNewStep += newStep;
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// Physical process is limiting the step, don't continue
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//
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if(std::fabs(totalNewStep-currentProposedStepLength) < kCarTolerance)
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{
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return currentProposedStepLength;
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}
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if(totalNewStep > currentProposedStepLength)
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{
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G4RegularNavigationHelper::Instance()->
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AddStepLength(copyNo, newStep-totalNewStep+currentProposedStepLength);
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return currentProposedStepLength;
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}
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else
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{
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G4RegularNavigationHelper::Instance()->AddStepLength( copyNo, newStep );
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}
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// Move container point until wall of voxel
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//
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containerPoint += newStep*localDirection;
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if( containerSolid->Inside( containerPoint ) != kInside )
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{
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break;
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}
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// Get copyNo and translation of new voxel
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//
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copyNo = param->GetReplicaNo(containerPoint, localDirection);
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G4ThreeVector voxelTranslation = param->GetTranslation( copyNo );
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// Move local point until wall of voxel and then put it in the new voxel
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// local coordinates
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//
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localPoint += newStep*localDirection;
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localPoint += prevVoxelTranslation - voxelTranslation;
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prevVoxelTranslation = voxelTranslation;
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// Check if material of next voxel is the same as that of the current voxel
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nextMate = param->ComputeMaterial( copyNo, nullptr, nullptr );
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if( currentMate != nextMate ) { break; }
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}
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return ourStep;
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}
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//------------------------------------------------------------------
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G4double
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G4RegularNavigation::ComputeSafety(const G4ThreeVector& localPoint,
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const G4NavigationHistory& history,
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const G4double pMaxLength)
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{
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// This method is never called because to be called the daughter has to be a
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// regular structure. This would only happen if the track is in the mother of
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// voxels volume. But the voxels fill completely their mother, so when a
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// track enters the mother it automatically enters a voxel. Only precision
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// problems would make this method to be called
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// Compute step in voxel
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//
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return fnormalNav->ComputeSafety(localPoint,
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history,
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pMaxLength );
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}
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//------------------------------------------------------------------
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G4bool
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G4RegularNavigation::LevelLocate( G4NavigationHistory& history,
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const G4VPhysicalVolume* ,
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const G4int ,
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const G4ThreeVector& globalPoint,
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const G4ThreeVector* globalDirection,
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const G4bool, // pLocatedOnEdge,
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G4ThreeVector& localPoint )
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{
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G4VPhysicalVolume *motherPhysical, *pPhysical;
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G4PhantomParameterisation *pParam;
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G4LogicalVolume *motherLogical;
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G4ThreeVector localDir;
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G4int replicaNo;
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motherPhysical = history.GetTopVolume();
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motherLogical = motherPhysical->GetLogicalVolume();
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pPhysical = motherLogical->GetDaughter(0);
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pParam = (G4PhantomParameterisation*)(pPhysical->GetParameterisation());
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// Save parent history in touchable history
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// ... for use as parent t-h in ComputeMaterial method of param
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//
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G4TouchableHistory parentTouchable( history );
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// Get local direction
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//
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if( globalDirection )
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{
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localDir = history.GetTopTransform().TransformAxis(*globalDirection);
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}
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else
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{
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localDir = G4ThreeVector(0.,0.,0.);
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}
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// Enter this daughter
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//
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replicaNo = pParam->GetReplicaNo( localPoint, localDir );
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if( replicaNo < 0 || replicaNo >= G4int(pParam->GetNoVoxels()) )
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{
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return false;
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}
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// Set the correct copy number in physical
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//
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pPhysical->SetCopyNo(replicaNo);
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pParam->ComputeTransformation(replicaNo,pPhysical);
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history.NewLevel(pPhysical, kParameterised, replicaNo );
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localPoint = history.GetTopTransform().TransformPoint(globalPoint);
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// Set the correct solid and material in Logical Volume
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//
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G4LogicalVolume *pLogical = pPhysical->GetLogicalVolume();
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pLogical->UpdateMaterial(pParam->ComputeMaterial(replicaNo,
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pPhysical, &parentTouchable) );
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return true;
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}
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