Gabriele Cosmo
199 lines
8.1 KiB
C++
199 lines
8.1 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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//
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//
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// class G4MultiNavigator
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//
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// Class description:
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//
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// Utility class for polling the navigators of several geometries to
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// identify the next boundary.
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// History:
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// - Created. John Apostolakis, November 2006
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// *********************************************************************
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#ifndef G4MULTINAVIGATOR_HH
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#define G4MULTINAVIGATOR_HH
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#include <iostream>
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#include "geomdefs.hh"
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#include "G4ThreeVector.hh"
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#include "G4Navigator.hh"
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#include "G4TouchableHistoryHandle.hh"
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#include "G4NavigationHistory.hh"
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enum ELimited { kDoNot,kUnique,kSharedTransport,kSharedOther,kUndefLimited };
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class G4TransportationManager;
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class G4VPhysicalVolume;
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class G4MultiNavigator : public G4Navigator
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{
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public: // with description
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friend std::ostream& operator << (std::ostream &os, const G4Navigator &n);
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G4MultiNavigator();
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// Constructor - initialisers and setup.
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~G4MultiNavigator();
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// Destructor. No actions.
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G4double ComputeStep(const G4ThreeVector &pGlobalPoint,
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const G4ThreeVector &pDirection,
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const G4double pCurrentProposedStepLength,
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G4double &pNewSafety);
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// Return the distance to the next boundary of any geometry
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G4double ObtainFinalStep( G4int navigatorId,
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G4double &pNewSafety, // for this geom
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G4double &minStepLast,
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ELimited &limitedStep);
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// Get values for a single geometry
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void PrepareNavigators();
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// Find which geometries are registered for this particles, and keep info
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void PrepareNewTrack( const G4ThreeVector position,
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const G4ThreeVector direction );
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// Prepare Navigators and locate
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G4VPhysicalVolume* ResetHierarchyAndLocate(const G4ThreeVector &point,
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const G4ThreeVector &direction,
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const G4TouchableHistory &h);
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// Reset the geometrical hierarchy for all geometries.
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// Use the touchable history for the first (mass) geometry.
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// Return the volume in the first (mass) geometry.
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//
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// Important Note: In order to call this the geometries MUST be closed.
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G4VPhysicalVolume* LocateGlobalPointAndSetup(const G4ThreeVector& point,
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const G4ThreeVector* direction=0,
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const G4bool pRelativeSearch=true,
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const G4bool ignoreDirection=true);
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// Locate in all geometries.
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// Return the volume in the first (mass) geometry
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// Maintain vector of other volumes, to be returned separately
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//
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// Important Note: In order to call this the geometry MUST be closed.
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void LocateGlobalPointWithinVolume(const G4ThreeVector& position);
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// Relocate in all geometries for point that has not changed volume
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// (ie is within safety in all geometries or is distance less that
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// along the direction of a computed step.
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G4double ComputeSafety(const G4ThreeVector &globalpoint,
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const G4double pProposedMaxLength = DBL_MAX,
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const G4bool keepState = false);
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// Calculate the isotropic distance to the nearest boundary
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// in any geometry from the specified point in the global coordinate
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// system. The geometry must be closed.
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G4TouchableHistoryHandle CreateTouchableHistoryHandle() const;
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// Returns a reference counted handle to a touchable history.
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virtual G4ThreeVector GetLocalExitNormal(G4bool* obtained); // const
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virtual G4ThreeVector GetLocalExitNormalAndCheck(const G4ThreeVector &CurrentE_Point,
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G4bool* obtained); // const
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virtual G4ThreeVector GetGlobalExitNormal(const G4ThreeVector &CurrentE_Point,
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G4bool* obtained); // const
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// Return Exit Surface Normal and validity too.
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// Can only be called if the Navigator's last Step either
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// - has just crossed a volume geometrical boundary and relocated, or
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// - has arrived at a boundary in a ComputeStep
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// It returns the Normal to the surface pointing out of the volume that
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// was left behind and/or into the volume that was entered.
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// Convention:x
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// The *local* normal is in the coordinate system of the *final* volume.
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// Restriction:
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// Normals are not available for replica volumes (returns obtained= false)
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public: // without description
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G4Navigator* GetNavigator(G4int n) const
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{
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if( (n>fNoActiveNavigators)||(n<0)){ n=0; }
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return fpNavigator[n];
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}
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protected: // with description
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void ResetState();
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// Utility method to reset the navigator state machine.
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void SetupHierarchy();
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// Renavigate & reset hierarchy described by current history
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// o Reset volumes
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// o Recompute transforms and/or solids of replicated/parameterised
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// volumes.
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void WhichLimited(); // Flag which processes limited the step
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void PrintLimited(); // Auxiliary, debugging printing
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void CheckMassWorld();
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private:
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// STATE Information
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G4int fNoActiveNavigators;
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static const G4int fMaxNav = 16; // rename to kMaxNoNav ??
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G4VPhysicalVolume* fLastMassWorld;
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// Global state (retained during stepping for one track
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G4Navigator* fpNavigator[fMaxNav]; // G4Navigator** fpNavigator;
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// State after a step computation
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ELimited fLimitedStep[fMaxNav];
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G4bool fLimitTruth[fMaxNav];
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G4double fCurrentStepSize[fMaxNav];
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G4double fNewSafety[ fMaxNav ]; // Safety for starting point
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G4int fNoLimitingStep; // How many geometries limited the step
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G4int fIdNavLimiting; // Id of Navigator limiting step (if only one limits)
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// Lowest values - determine step length, and safety
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G4double fMinStep; // As reported by Navigators. Can be kInfinity
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G4double fMinSafety;
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G4double fTrueMinStep; // Corrected in case fMinStep >= proposed
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// State after calling 'locate'
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G4VPhysicalVolume* fLocatedVolume[fMaxNav];
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G4ThreeVector fLastLocatedPosition;
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// cache of safety information
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G4ThreeVector fSafetyLocation; // point where ComputeSafety is called
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G4double fMinSafety_atSafLocation; // /\ corresponding value of safety
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G4ThreeVector fPreStepLocation; // point where last ComputeStep called
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G4double fMinSafety_PreStepPt; // /\ corresponding value of safety
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G4TransportationManager* pTransportManager; // Cache for frequent use
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};
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#endif
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