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geant4/source/geometry/management/include/G4Region.hh
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Gabriele Cosmo b4a16de652 Import Geant4 11.4.0 source tree
2025-12-05 08:54:02 +01:00

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//
// ********************************************************************
// * License and Disclaimer *
// * *
// * The Geant4 software is copyright of the Copyright Holders of *
// * the Geant4 Collaboration. It is provided under the terms and *
// * conditions of the Geant4 Software License, included in the file *
// * LICENSE and available at http://cern.ch/geant4/license . These *
// * include a list of copyright holders. *
// * *
// * Neither the authors of this software system, nor their employing *
// * institutes,nor the agencies providing financial support for this *
// * work make any representation or warranty, express or implied, *
// * regarding this software system or assume any liability for its *
// * use. Please see the license in the file LICENSE and URL above *
// * for the full disclaimer and the limitation of liability. *
// * *
// * This code implementation is the result of the scientific and *
// * technical work of the GEANT4 collaboration. *
// * By using, copying, modifying or distributing the software (or *
// * any work based on the software) you agree to acknowledge its *
// * use in resulting scientific publications, and indicate your *
// * acceptance of all terms of the Geant4 Software license. *
// ********************************************************************
//
// G4Region
//
// Class description:
//
// Defines a region or a group of regions in the detector geometry
// setup, sharing properties associated to materials or production
// cuts which may affect or bias specific physics processes.
// Author: Gabriele Cosmo (CERN), 18.09.2002
// --------------------------------------------------------------------
#ifndef G4REGION_HH
#define G4REGION_HH 1
#include <vector>
#include <map>
#include <algorithm>
#include "G4Types.hh"
#include "G4String.hh"
#include "G4GeomSplitter.hh"
class G4ProductionCuts;
class G4LogicalVolume;
class G4Material;
class G4VUserRegionInformation;
class G4MaterialCutsCouple;
class G4UserLimits;
class G4FieldManager;
class G4FastSimulationManager;
class G4VPhysicalVolume;
class G4UserSteppingAction;
/**
* @brief G4RegionData encapsulates the fields associated to the class
* G4Region that may not be read-only..
*/
class G4RegionData
{
public:
void initialize()
{
fFastSimulationManager = nullptr;
fRegionalSteppingAction = nullptr;
}
G4FastSimulationManager* fFastSimulationManager;
G4UserSteppingAction* fRegionalSteppingAction;
};
// Encapsulate the methods used by both the master thread and worker threads
// to allocate memory space for the fields encapsulated by the class
// G4RegionData.
//
using G4RegionManager = G4GeomSplitter<G4RegionData>;
/**
* @brief G4Region defines a region or a group of regions in the detector
* geometry setup, sharing properties associated to materials or production
* cuts which may affect or bias specific physics processes.
*/
class G4Region
{
public:
/**
* Constructor for G4Region.
* @param[in] name The name of the region.
*/
G4Region(const G4String& name);
/**
* Destructor.
*/
~G4Region();
/**
* Copy constructor and assignment operator not allowed.
*/
G4Region(const G4Region&) = delete;
G4Region& operator=(const G4Region&) = delete;
/**
* Equality operator, defined by address only.
*/
inline G4bool operator==(const G4Region& rg) const;
/**
* Adds a root logical volume and sets its daughters flags as regions.
* It also recompute the materials list for the region.
* Search in the tree can be turned off, assuming the user guarantees
* the logical volume is NOT already inserted, in which case significant
* speedup can be achieved in complex flat geometry setups.
* @param[in] lv Pointer to the logical volume to act as root region.
* @param[in] search To enable/disable search in the tree (default true).
*/
void AddRootLogicalVolume(G4LogicalVolume* lv, G4bool search=true);
/**
* Removes a root logical volume and resets its daughters flags as regions.
* It also recompute the materials list for the region.
* The flag for scanning the subtree is always enabled by default.
* @param[in] lv Pointer to the logical volume to remove as root region.
* @param[in] scan To enable/disable scanning the tree (default true).
*/
void RemoveRootLogicalVolume(G4LogicalVolume* lv, G4bool scan=true);
/**
* Setter/getter for the region's name.
*/
void SetName(const G4String& name);
inline const G4String& GetName() const;
/**
* Accessors to flag identifying if a region has been modified (and still
* cuts needs to be computed) or not.
*/
inline void RegionModified(G4bool flag);
inline G4bool IsModified() const;
/**
* Setter/getter for the production cuts values.
*/
inline void SetProductionCuts(G4ProductionCuts* cut);
inline G4ProductionCuts* GetProductionCuts() const;
/**
* Methods to return iterators to the lists of root logical volumes
* and materials.
*/
inline std::vector<G4LogicalVolume*>::iterator
GetRootLogicalVolumeIterator();
inline std::vector<G4Material*>::const_iterator
GetMaterialIterator() const;
/**
* Methods to return the number of elements in the lists of materials and
* root logical volumes.
*/
inline std::size_t GetNumberOfMaterials() const;
inline std::size_t GetNumberOfRootVolumes() const;
/**
* Clears the material list and recomputes it, looping through each root
* logical volume in the region.
*/
void UpdateMaterialList();
/**
* Clears the material list.
*/
void ClearMaterialList();
/**
* Scans recursively the 'lv' logical volume tree, retrieves and places
* all materials in the list if becoming a region.
*/
void ScanVolumeTree(G4LogicalVolume* lv, G4bool region);
/**
* Setter/getter for the user information data.
*/
inline void SetUserInformation(G4VUserRegionInformation* ui);
inline G4VUserRegionInformation* GetUserInformation() const;
/**
* Setter/getter for the user-limits associated to a region.
* Once user-limits are set, it will propagate to the daughter volumes.
*/
inline void SetUserLimits(G4UserLimits* ul);
inline G4UserLimits* GetUserLimits() const;
/**
* Resets the material-cuts-couples map.
*/
inline void ClearMap();
/**
* Method invoked by G4ProductionCutsTable to register the material-cuts
* couple pair.
*/
inline void RegisterMaterialCouplePair(G4Material* mat,
G4MaterialCutsCouple* couple);
/**
* Finds a G4MaterialCutsCouple which corresponds to the material 'mat'
* in the region.
*/
inline G4MaterialCutsCouple* FindCouple(G4Material* mat);
/**
* Setter/getter for the fast-simulation manager. The root logical volume
* that has the region with G4FastSimulationManager becomes an envelope of
* fast simulation.
*/
void SetFastSimulationManager(G4FastSimulationManager* fsm);
G4FastSimulationManager* GetFastSimulationManager() const;
/**
* Sets the G4FastSimulationManager pointer to the one for the parent
* region if it exists, otherwise it sets it to null.
*/
void ClearFastSimulationManager();
/**
* Setter/getter for the field manager. The region with assigned
* field-manager sets the field to the geometrical area associated with
* it; priority is anyhow given to local fields eventually set to logical
* volumes.
*/
inline void SetFieldManager(G4FieldManager* fm);
inline G4FieldManager* GetFieldManager() const;
/**
* Get method for the world physical volume which the region belongs to.
* A valid pointer will be assigned by G4RunManagerKernel through the
* G4RegionStore when the geometry is to be closed. Thus, this pointer
* may be incorrect at the PreInit and Idle state. If the pointer is null
* at the proper state, this particular region does not belong to any
* world (maybe not assigned to any volume, etc.).
*/
inline G4VPhysicalVolume* GetWorldPhysical() const;
/**
* Sets the world physical volume if the region belongs to this world.
* If 'wp' pointer is null, resets the pointer.
*/
void SetWorld(G4VPhysicalVolume* wp);
/**
* Returns whether the region belongs to the given physical volume 'pv'
* (recursively scanned to the bottom of the hierarchy).
*/
G4bool BelongsTo(G4VPhysicalVolume* pv) const;
/**
* Returns a region that contains this region. Otherwise null returned.
* @param[out] unique Returns true if there is only one parent region
* containing the current region.
* @returns A pointer to the mother region.
*/
G4Region* GetParentRegion(G4bool& unique) const;
/**
* Setter/getter methods for the regional user stepping action.
*/
void SetRegionalSteppingAction(G4UserSteppingAction* rusa);
G4UserSteppingAction* GetRegionalSteppingAction() const;
/**
* Fake default constructor for usage restricted to direct object
* persistency for clients requiring preallocation of memory for
* persistifiable objects.
*/
G4Region(__void__&);
/**
* Returns the instance ID for multi-threading.
*/
inline G4int GetInstanceID() const;
/**
* Returns the private data instance manager for multi-threading.
*/
static const G4RegionManager& GetSubInstanceManager();
/**
* Clears the memory allocated by the MT sub-instance manager.
*/
static void Clean();
/**
* Utility methods to identify if the region is part of the main mass
* geometry for tracking or part of a parallel geometry.
*/
inline void UsedInMassGeometry(G4bool val = true);
inline void UsedInParallelGeometry(G4bool val = true);
inline G4bool IsInMassGeometry() const;
inline G4bool IsInParallelGeometry() const;
private:
/**
* Searchs the specified material 'aMaterial' in the material table and
* if not present adds it.
*/
inline void AddMaterial (G4Material* aMaterial);
private:
using G4RootLVList = std::vector<G4LogicalVolume*>;
using G4MaterialList = std::vector<G4Material*>;
using G4MaterialCouplePair = std::pair<G4Material*, G4MaterialCutsCouple*>;
using G4MaterialCoupleMap = std::map<G4Material*, G4MaterialCutsCouple*>;
G4String fName;
G4RootLVList fRootVolumes;
G4MaterialList fMaterials;
G4MaterialCoupleMap fMaterialCoupleMap;
G4bool fRegionMod = true;
G4ProductionCuts* fCut = nullptr;
G4VUserRegionInformation* fUserInfo = nullptr;
G4UserLimits* fUserLimits = nullptr;
G4FieldManager* fFieldManager = nullptr;
G4VPhysicalVolume* fWorldPhys = nullptr;
G4bool fInMassGeometry = false;
G4bool fInParallelGeometry = false;
/** This field is used as instance ID. */
G4int instanceID;
/** This field helps to use the class G4RegionManager introduced above. */
G4GEOM_DLL static G4RegionManager subInstanceManager;
};
#include "G4Region.icc"
// NOTE:
//
// The type G4RegionManager is introduced to encapsulate the methods used by
// both the master thread and worker threads to allocate memory space for
// the fields encapsulated by the class G4RegionData. When each thread
// initializes the value for these fields, it refers to them using a macro
// definition defined below. For every G4Region instance, there is a
// corresponding G4RegionData instance. All G4RegionData instances are
// organized by the class G4RegionManager as an array.
// The field "int instanceID" is added to the class G4Region.
// The value of this field in each G4Region instance is the subscript
// of the corresponding G4RegionData instance.
// In order to use the class G4RegionManager, we add a static member in
// the class G4Region as follows: "static G4RegionManager subInstanceManager".
// For the master thread, the array for G4RegionData instances grows
// dynamically along with G4Region instances are created. For each worker
// thread, it copies the array of G4RegionData instances from the master thread.
// In addition, it invokes a method similiar to the constructor explicitly
// to achieve the partial effect for each instance in the array.
#endif
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