| 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: G4SafetyHelper.hh,v 1.7 2007/05/02 15:32:13 japost Exp $
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| 28 | // GEANT4 tag $Name: geant4-09-03 $
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| 29 | //
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| 30 | //
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| 31 | // class G4SafetyHelper
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| 32 | //
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| 33 | // Class description:
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| 34 | //
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| 35 | // This class is a helper for physics processes which require
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| 36 | // knowledge of the safety, and the step size for the 'mass' geometry
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| 37 |
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| 38 | // First version: J. Apostolakis, July 5th, 2006
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| 39 | // Modified:
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| 40 | // 10.04.07 V.Ivanchenko Use unique G4SafetyHelper
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| 41 | // --------------------------------------------------------------------
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| 42 |
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| 43 | #ifndef G4SAFETYHELPER_HH
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| 44 | #define G4SAFETYHELPER_HH 1
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| 45 |
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| 46 | #include <vector>
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| 47 |
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| 48 | #include "G4Types.hh"
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| 49 | #include "G4ThreeVector.hh"
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| 50 | #include "G4Navigator.hh"
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| 51 |
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| 52 | class G4PathFinder;
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| 53 |
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| 54 | class G4SafetyHelper
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| 55 | {
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| 56 | public: // with description
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| 57 |
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| 58 | G4SafetyHelper();
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| 59 | ~G4SafetyHelper();
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| 60 | //
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| 61 | // Constructor and destructor
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| 62 |
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| 63 | G4double CheckNextStep( const G4ThreeVector& position,
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| 64 | const G4ThreeVector& direction,
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| 65 | const G4double currentMaxStep,
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| 66 | G4double& newSafety );
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| 67 | //
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| 68 | // Return linear step for mass geometry
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| 69 |
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| 70 | G4double ComputeSafety( const G4ThreeVector& pGlobalPoint );
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| 71 | //
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| 72 | // Return safety for all geometries
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| 73 |
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| 74 | void Locate(const G4ThreeVector& pGlobalPoint,
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| 75 | const G4ThreeVector& direction);
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| 76 | //
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| 77 | // Locate the point for all geometries
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| 78 |
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| 79 | void ReLocateWithinVolume(const G4ThreeVector& pGlobalPoint );
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| 80 | //
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| 81 | // Relocate the point in the volume of interest
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| 82 |
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| 83 | inline void EnableParallelNavigation(G4bool parallel);
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| 84 | //
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| 85 | // To have parallel worlds considered, must be true.
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| 86 | // Alternative is to use single (mass) Navigator directly
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| 87 |
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| 88 | void InitialiseNavigator();
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| 89 | //
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| 90 | // Check for new navigator for tracking, and reinitialise pointer
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| 91 |
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| 92 | inline G4VPhysicalVolume* GetWorldVolume();
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| 93 | inline void SetCurrentSafety(G4double val, const G4ThreeVector& pos);
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| 94 |
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| 95 | public: // without description
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| 96 |
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| 97 | void InitialiseHelper();
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| 98 |
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| 99 | private:
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| 100 |
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| 101 | G4PathFinder* fpPathFinder;
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| 102 | G4Navigator* fpMassNavigator;
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| 103 | G4int fMassNavigatorId;
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| 104 |
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| 105 | G4bool fUseParallelGeometries;
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| 106 | // Flag whether to use PathFinder or single (mass) Navigator directly
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| 107 | G4bool fFirstCall;
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| 108 | // Flag of first call
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| 109 |
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| 110 | // State used during tracking -- for optimisation
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| 111 | G4ThreeVector fLastSafetyPosition;
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| 112 | G4double fLastSafety;
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| 113 | const G4double fRecomputeFactor;
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| 114 | // parameter for further optimisation:
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| 115 | // if ( move < fact*safety ) do fast recomputation of safety
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| 116 | // End State (tracking)
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| 117 | };
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| 118 |
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| 119 | // Inline definitions
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| 120 |
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| 121 | inline
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| 122 | void G4SafetyHelper::EnableParallelNavigation(G4bool parallel)
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| 123 | {
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| 124 | fUseParallelGeometries = parallel;
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| 125 | }
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| 126 |
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| 127 | inline
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| 128 | G4VPhysicalVolume* G4SafetyHelper::GetWorldVolume()
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| 129 | {
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| 130 | return fpMassNavigator->GetWorldVolume();
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| 131 | }
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| 132 |
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| 133 | inline
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| 134 | void G4SafetyHelper::SetCurrentSafety(G4double val, const G4ThreeVector& pos)
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| 135 | {
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| 136 | fLastSafety = val;
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| 137 | fLastSafetyPosition = pos;
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| 138 | }
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| 139 |
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| 140 | #endif
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