| 1 | //
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| 2 | // ********************************************************************
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| 3 | // * License and Disclaimer *
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| 4 | // * *
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| 5 | // * The Geant4 software is copyright of the Copyright Holders of *
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| 6 | // * the Geant4 Collaboration. It is provided under the terms and *
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| 7 | // * conditions of the Geant4 Software License, included in the file *
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| 8 | // * LICENSE and available at http://cern.ch/geant4/license . These *
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| 9 | // * include a list of copyright holders. *
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| 10 | // * *
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| 11 | // * Neither the authors of this software system, nor their employing *
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| 12 | // * institutes,nor the agencies providing financial support for this *
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| 13 | // * work make any representation or warranty, express or implied, *
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| 14 | // * regarding this software system or assume any liability for its *
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| 15 | // * use. Please see the license in the file LICENSE and URL above *
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| 16 | // * for the full disclaimer and the limitation of liability. *
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| 17 | // * *
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| 18 | // * This code implementation is the result of the scientific and *
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| 19 | // * technical work of the GEANT4 collaboration. *
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| 20 | // * By using, copying, modifying or distributing the software (or *
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| 21 | // * any work based on the software) you agree to acknowledge its *
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| 22 | // * use in resulting scientific publications, and indicate your *
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| 23 | // * acceptance of all terms of the Geant4 Software license. *
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| 24 | // ********************************************************************
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| 25 | //
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| 26 | //
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| 27 | // $Id: G4RegularNavigation.cc,v 1.15 2010/11/19 15:13:39 gcosmo Exp $
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| 28 | // GEANT4 tag $ Name:$
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| 29 | //
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| 30 | // class G4RegularNavigation implementation
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| 31 | //
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| 32 | // Author: Pedro Arce, May 2007
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| 33 | //
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| 34 | // --------------------------------------------------------------------
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| 35 |
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| 36 | #include "G4RegularNavigation.hh"
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| 37 | #include "G4TouchableHistory.hh"
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| 38 | #include "G4PhantomParameterisation.hh"
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| 39 | #include "G4Material.hh"
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| 40 | #include "G4NormalNavigation.hh"
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| 41 | #include "G4Navigator.hh"
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| 42 | #include "G4GeometryTolerance.hh"
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| 43 | #include "G4RegularNavigationHelper.hh"
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| 44 |
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| 45 | //------------------------------------------------------------------
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| 46 | G4RegularNavigation::G4RegularNavigation()
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| 47 | : fverbose(false), fcheck(false), fnormalNav(0)
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| 48 | {
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| 49 | kCarTolerance = G4GeometryTolerance::GetInstance()->GetSurfaceTolerance();
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| 50 | }
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| 51 |
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| 52 |
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| 53 | //------------------------------------------------------------------
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| 54 | G4RegularNavigation::~G4RegularNavigation()
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| 55 | {
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| 56 | }
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| 57 |
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| 58 |
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| 59 | //------------------------------------------------------------------
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| 60 | G4double G4RegularNavigation::
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| 61 | ComputeStep(const G4ThreeVector& localPoint,
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| 62 | const G4ThreeVector& localDirection,
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| 63 | const G4double currentProposedStepLength,
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| 64 | G4double& newSafety,
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| 65 | G4NavigationHistory& history,
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| 66 | G4bool& validExitNormal,
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| 67 | G4ThreeVector& exitNormal,
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| 68 | G4bool& exiting,
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| 69 | G4bool& entering,
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| 70 | G4VPhysicalVolume *(*pBlockedPhysical),
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| 71 | G4int& blockedReplicaNo)
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| 72 | {
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| 73 | // This method is never called because to be called the daughter has to be
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| 74 | // a regular structure. This would only happen if the track is in the mother
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| 75 | // of voxels volume. But the voxels fill completely their mother, so when a
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| 76 | // track enters the mother it automatically enters a voxel. Only precision
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| 77 | // problems would make this method to be called
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| 78 |
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| 79 | G4ThreeVector globalPoint =
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| 80 | history.GetTopTransform().Inverse().TransformPoint(localPoint);
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| 81 | G4ThreeVector globalDirection =
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| 82 | history.GetTopTransform().Inverse().TransformAxis(localDirection);
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| 83 |
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| 84 | G4ThreeVector localPoint2 = localPoint; // take away constantness
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| 85 |
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| 86 | LevelLocate( history, *pBlockedPhysical, blockedReplicaNo,
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| 87 | globalPoint, &globalDirection, true, localPoint2 );
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| 88 |
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| 89 |
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| 90 | // Get in which voxel it is
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| 91 | //
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| 92 | G4VPhysicalVolume *motherPhysical, *daughterPhysical;
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| 93 | G4LogicalVolume *motherLogical;
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| 94 | motherPhysical = history.GetTopVolume();
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| 95 | motherLogical = motherPhysical->GetLogicalVolume();
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| 96 | daughterPhysical = motherLogical->GetDaughter(0);
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| 97 |
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| 98 | G4PhantomParameterisation * daughterParam =
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| 99 | (G4PhantomParameterisation*)(daughterPhysical->GetParameterisation());
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| 100 | G4int copyNo = daughterParam ->GetReplicaNo(localPoint,localDirection);
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| 101 |
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| 102 | G4ThreeVector voxelTranslation = daughterParam->GetTranslation( copyNo );
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| 103 | G4ThreeVector daughterPoint = localPoint - voxelTranslation;
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| 104 |
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| 105 |
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| 106 | // Compute step in voxel
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| 107 | //
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| 108 | return fnormalNav->ComputeStep(daughterPoint,
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| 109 | localDirection,
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| 110 | currentProposedStepLength,
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| 111 | newSafety,
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| 112 | history,
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| 113 | validExitNormal,
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| 114 | exitNormal,
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| 115 | exiting,
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| 116 | entering,
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| 117 | pBlockedPhysical,
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| 118 | blockedReplicaNo);
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| 119 | }
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| 120 |
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| 121 |
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| 122 | //------------------------------------------------------------------
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| 123 | G4double G4RegularNavigation::ComputeStepSkippingEqualMaterials(
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| 124 | G4ThreeVector& localPoint,
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| 125 | const G4ThreeVector& localDirection,
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| 126 | const G4double currentProposedStepLength,
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| 127 | G4double& newSafety,
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| 128 | G4NavigationHistory& history,
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| 129 | G4bool& validExitNormal,
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| 130 | G4ThreeVector& exitNormal,
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| 131 | G4bool& exiting,
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| 132 | G4bool& entering,
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| 133 | G4VPhysicalVolume *(*pBlockedPhysical),
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| 134 | G4int& blockedReplicaNo,
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| 135 | G4VPhysicalVolume* pCurrentPhysical)
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| 136 | {
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| 137 | G4RegularNavigationHelper::ClearStepLengths();
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| 138 |
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| 139 | G4PhantomParameterisation *param =
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| 140 | (G4PhantomParameterisation*)(pCurrentPhysical->GetParameterisation());
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| 141 |
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| 142 | if( !param->SkipEqualMaterials() )
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| 143 | {
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| 144 | return fnormalNav->ComputeStep(localPoint,
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| 145 | localDirection,
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| 146 | currentProposedStepLength,
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| 147 | newSafety,
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| 148 | history,
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| 149 | validExitNormal,
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| 150 | exitNormal,
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| 151 | exiting,
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| 152 | entering,
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| 153 | pBlockedPhysical,
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| 154 | blockedReplicaNo);
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| 155 | }
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| 156 |
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| 157 |
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| 158 | G4double ourStep = 0.;
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| 159 |
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| 160 | // To get replica No: transform local point to the reference system of the
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| 161 | // param container volume
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| 162 | //
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| 163 | G4int ide = history.GetDepth();
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| 164 | G4ThreeVector containerPoint = history.GetTransform(ide).Inverse().TransformPoint(localPoint);
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| 165 |
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| 166 | // Point in global frame
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| 167 | //
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| 168 | containerPoint = history.GetTransform(ide).Inverse().TransformPoint(localPoint);
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| 169 |
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| 170 | // Point in voxel parent volume frame
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| 171 | //
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| 172 | containerPoint = history.GetTransform(ide-1).TransformPoint(containerPoint);
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| 173 |
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| 174 | // Store previous voxel translation to move localPoint by the difference
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| 175 | // with the new one
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| 176 | //
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| 177 | G4ThreeVector prevVoxelTranslation = containerPoint - localPoint;
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| 178 |
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| 179 | // Do not use the expression below: There are cases where the
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| 180 | // fLastLocatedPointLocal does not give the correct answer
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| 181 | // (particle reaching a wall and bounced back, particle travelling through
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| 182 | // the wall that is deviated in an step, ...; these are pathological cases
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| 183 | // that give wrong answers in G4PhantomParameterisation::GetReplicaNo()
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| 184 | //
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| 185 | // G4ThreeVector prevVoxelTranslation = param->GetTranslation( copyNo );
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| 186 |
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| 187 | G4int copyNo = param->GetReplicaNo(containerPoint,localDirection);
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| 188 |
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| 189 | G4Material* currentMate = param->ComputeMaterial( copyNo, 0, 0 );
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| 190 | G4VSolid* voxelBox = pCurrentPhysical->GetLogicalVolume()->GetSolid();
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| 191 |
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| 192 | G4VSolid* containerSolid = param->GetContainerSolid();
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| 193 | G4Material* nextMate;
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| 194 | G4bool bLocatedOnEdge = false;
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| 195 | G4bool bFirstStep = true;
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| 196 | G4double newStep;
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| 197 | G4double totalNewStep = 0.;
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| 198 |
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| 199 | // Loop while same material is found
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| 200 | //
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| 201 | for( ;; )
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| 202 | {
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| 203 | newStep = voxelBox->DistanceToOut( localPoint, localDirection );
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| 204 |
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| 205 | if( (bFirstStep) && (newStep < currentProposedStepLength) )
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| 206 | {
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| 207 | exiting = true;
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| 208 | }
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| 209 | bFirstStep = false;
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| 210 |
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| 211 | newStep += kCarTolerance; // Avoid precision problems
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| 212 | ourStep += newStep;
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| 213 | totalNewStep += newStep;
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| 214 |
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| 215 | // Physical process is limiting the step, don't continue
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| 216 | //
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| 217 | if(std::fabs(totalNewStep-currentProposedStepLength) < kCarTolerance)
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| 218 | {
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| 219 | return currentProposedStepLength;
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| 220 | }
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| 221 | if(totalNewStep > currentProposedStepLength)
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| 222 | {
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| 223 | G4RegularNavigationHelper::
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| 224 | AddStepLength(copyNo, newStep-totalNewStep+currentProposedStepLength);
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| 225 | return currentProposedStepLength;
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| 226 | }
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| 227 | else
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| 228 | {
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| 229 | G4RegularNavigationHelper::AddStepLength( copyNo, newStep );
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| 230 | }
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| 231 |
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| 232 |
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| 233 | // Move container point until wall of voxel
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| 234 | //
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| 235 | containerPoint += newStep*localDirection;
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| 236 | if( containerSolid->Inside( containerPoint ) != kInside )
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| 237 | {
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| 238 | bLocatedOnEdge = true; // NEEDED??
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| 239 | break;
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| 240 | }
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| 241 |
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| 242 | // Get copyNo and translation of new voxel
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| 243 | //
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| 244 | copyNo = param->GetReplicaNo(containerPoint,localDirection);
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| 245 | G4ThreeVector voxelTranslation = param->GetTranslation( copyNo );
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| 246 |
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| 247 | // G4cout << " copyNo " << copyNo << " = " << pCurrentPhysical->GetCopyNo() << G4endl;
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| 248 | // Move local point until wall of voxel and then put it in the new voxel
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| 249 | // local coordinates
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| 250 | //
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| 251 | localPoint += newStep*localDirection;
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| 252 | localPoint += prevVoxelTranslation - voxelTranslation;
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| 253 |
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| 254 | prevVoxelTranslation = voxelTranslation;
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| 255 |
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| 256 | // Check if material of next voxel is the same as that of the current voxel
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| 257 | nextMate = param->ComputeMaterial( copyNo, 0, 0 );
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| 258 |
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| 259 | if( currentMate != nextMate ) { break; }
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| 260 | }
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| 261 |
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| 262 | return ourStep;
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| 263 | }
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| 264 |
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| 265 |
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| 266 | //------------------------------------------------------------------
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| 267 | G4double
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| 268 | G4RegularNavigation::ComputeSafety(const G4ThreeVector& localPoint,
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| 269 | const G4NavigationHistory& history,
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| 270 | const G4double pMaxLength)
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| 271 | {
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| 272 | // This method is never called because to be called the daughter has to be a
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| 273 | // regular structure. This would only happen if the track is in the mother of
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| 274 | // voxels volume. But the voxels fill completely their mother, so when a
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| 275 | // track enters the mother it automatically enters a voxel. Only precision
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| 276 | // problems would make this method to be called
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| 277 |
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| 278 | // Compute step in voxel
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| 279 | //
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| 280 | return fnormalNav->ComputeSafety(localPoint,
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| 281 | history,
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| 282 | pMaxLength );
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| 283 | }
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| 284 |
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| 285 |
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| 286 | //------------------------------------------------------------------
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| 287 | G4bool
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| 288 | G4RegularNavigation::LevelLocate( G4NavigationHistory& history,
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| 289 | const G4VPhysicalVolume* ,
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| 290 | const G4int ,
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| 291 | const G4ThreeVector& globalPoint,
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| 292 | const G4ThreeVector* globalDirection,
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| 293 | const G4bool, // pLocatedOnEdge,
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| 294 | G4ThreeVector& localPoint )
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| 295 | {
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| 296 | G4VPhysicalVolume *motherPhysical, *pPhysical;
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| 297 | G4PhantomParameterisation *pParam;
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| 298 | G4LogicalVolume *motherLogical;
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| 299 | G4ThreeVector localDir;
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| 300 | G4int replicaNo;
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| 301 |
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| 302 | motherPhysical = history.GetTopVolume();
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| 303 | motherLogical = motherPhysical->GetLogicalVolume();
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| 304 |
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| 305 | pPhysical = motherLogical->GetDaughter(0);
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| 306 | pParam = (G4PhantomParameterisation*)(pPhysical->GetParameterisation());
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| 307 |
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| 308 | // Save parent history in touchable history
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| 309 | // ... for use as parent t-h in ComputeMaterial method of param
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| 310 | //
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| 311 | G4TouchableHistory parentTouchable( history );
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| 312 |
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| 313 | // Get local direction
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| 314 | //
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| 315 | if( globalDirection )
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| 316 | {
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| 317 | localDir = history.GetTopTransform().TransformAxis(*globalDirection);
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| 318 | }
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| 319 | else
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| 320 | {
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| 321 | localDir = G4ThreeVector(0.,0.,0.);
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| 322 | }
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| 323 |
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| 324 | // Enter this daughter
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| 325 | //
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| 326 | replicaNo = pParam->GetReplicaNo( localPoint, localDir );
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| 327 |
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| 328 | if( replicaNo < 0 || replicaNo >= G4int(pParam->GetNoVoxel()) )
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| 329 | {
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| 330 | return false;
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| 331 | }
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| 332 |
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| 333 | // Set the correct copy number in physical
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| 334 | //
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| 335 | pPhysical->SetCopyNo(replicaNo);
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| 336 | pParam->ComputeTransformation(replicaNo,pPhysical);
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| 337 |
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| 338 | history.NewLevel(pPhysical, kParameterised, replicaNo );
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| 339 | localPoint = history.GetTopTransform().TransformPoint(globalPoint);
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| 340 |
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| 341 | // Set the correct solid and material in Logical Volume
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| 342 | //
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| 343 | G4LogicalVolume *pLogical = pPhysical->GetLogicalVolume();
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| 344 |
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| 345 | pLogical->UpdateMaterial(pParam->ComputeMaterial(replicaNo,
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| 346 | pPhysical, &parentTouchable) );
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| 347 | return true;
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| 348 | }
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