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 //
 // 
 // John Allison  31st December 1997.
 //
 // Class Description:
 //
 // Model for physical volumes.  It describes a physical volume and its
 // daughters to any desired depth.  Note: the "requested depth" is
 // specified in the modeling parameters; enum {UNLIMITED = -1}.
 //
 // For access to base class information, e.g., modeling parameters,
 // use GetModelingParameters() inherited from G4VModel.  See Class
 // Description of the base class G4VModel.
 //
 // G4PhysicalVolumeModel assumes the modeling parameters have been set
 // up with meaningful information - default vis attributes and culling
 // policy in particular.
 //
 // The volumes are unpacked and sent to the scene handler.  They are,
 // in effect, "touchables" as defined by G4TouchableHistory.  A
 // touchable is defined not only by its physical volume name and copy
 // number but also by its position in the geometry hierarchy.
 //
 // It is guaranteed that touchables are presented to the scene handler
 // in top-down hierarchy order, i.e., ancestors first, mothers before
 // daughters, so the scene handler can be assured that, if it is
 // building its own scene graph tree, a mother, if any, will have
 // already been encountered and there will already be a node in place
 // on which to hang the current volume.  But be aware that the
 // visibility and culling policy might mean that some touchables are
 // not passed to the scene handler so the drawn tree might have
 // missing layers.  GetFullPVPath allows you to know the full
 // hierarchy.
 
 #ifndef G4PHYSICALVOLUMEMODEL_HH
 #define G4PHYSICALVOLUMEMODEL_HH
 
 #include "G4VModel.hh"
 #include "G4ModelingParameters.hh"
 
 #include "G4VTouchable.hh"
 #include "G4Transform3D.hh"
 #include "G4Plane3D.hh"
 #include <iostream>
 #include <vector>
 #include <map>
 
 class G4VPhysicalVolume;
 class G4LogicalVolume;
 class G4VSolid;
 class G4Material;
 class G4VisAttributes;
 class G4AttDef;
 class G4AttValue;
 
 class G4PhysicalVolumeModel: public G4VModel {
 
 public: // With description
 
   enum {UNLIMITED = -1};
 
   enum ClippingMode {subtraction, intersection};
 
   // Nested class for identifying physical volume nodes.
   class G4PhysicalVolumeNodeID {
   public:
     G4PhysicalVolumeNodeID
     (G4VPhysicalVolume* pPV = 0,
      G4int iCopyNo = 0,
      G4int depth = 0,
      const G4Transform3D& transform = G4Transform3D(),
      G4bool drawn = true):
       fpPV(pPV),
       fCopyNo(iCopyNo),
       fNonCulledDepth(depth),
       fTransform(transform),
       fDrawn(drawn) {}
     G4VPhysicalVolume* GetPhysicalVolume() const {return fpPV;}
     G4int  GetCopyNo()                     const {return fCopyNo;}
     G4int  GetNonCulledDepth()             const {return fNonCulledDepth;}
     const  G4Transform3D& GetTransform()   const {return fTransform;}
     G4bool GetDrawn()                      const {return fDrawn;}
     void SetPhysicalVolume(G4VPhysicalVolume* v)   {fpPV = v;}
     void SetCopyNo        (G4int n)                {fCopyNo = n;}
     void SetNonCulledDepth(G4int d)                {fNonCulledDepth = d;}
     void SetTransform     (const G4Transform3D& t) {fTransform = t;}
     void SetDrawn         (G4bool b)               {fDrawn = b;}
     G4bool operator<  (const G4PhysicalVolumeNodeID& right) const;
     G4bool operator!= (const G4PhysicalVolumeNodeID& right) const;
     G4bool operator== (const G4PhysicalVolumeNodeID& right) const {
       return !operator!= (right);
     }
   private:
     G4VPhysicalVolume* fpPV;
     G4int fCopyNo;
     G4int fNonCulledDepth;
     G4Transform3D fTransform;
     G4bool fDrawn;
   };
 
   // Nested class for handling nested parameterisations.
   class G4PhysicalVolumeModelTouchable: public G4VTouchable {
   public:
     G4PhysicalVolumeModelTouchable
     (const std::vector<G4PhysicalVolumeNodeID>& fullPVPath);
     const G4ThreeVector& GetTranslation(G4int depth) const;
     const G4RotationMatrix* GetRotation(G4int depth) const;
     G4VPhysicalVolume* GetVolume(G4int depth) const;
     G4VSolid* GetSolid(G4int depth) const;
     G4int GetReplicaNumber(G4int depth) const;
     G4int GetHistoryDepth() const {return G4int(fFullPVPath.size());}
   private:
     const std::vector<G4PhysicalVolumeNodeID>& fFullPVPath;
   };
 
   // Nested struct for encapsulating touchable properties
   struct TouchableProperties {
     TouchableProperties(): fpTouchablePV(nullptr), fCopyNo(0) {}
     G4ModelingParameters::PVNameCopyNoPath fTouchablePath;
     G4VPhysicalVolume*                     fpTouchablePV;
     G4int                                  fCopyNo;
     G4Transform3D                          fTouchableGlobalTransform;
     std::vector<G4PhysicalVolumeNodeID>    fTouchableBaseFullPVPath;
     std::vector<G4PhysicalVolumeNodeID>    fTouchableFullPVPath;
   };
 
   G4PhysicalVolumeModel
   (G4VPhysicalVolume* = 0,
    G4int requestedDepth = UNLIMITED,
    const G4Transform3D& modelTransformation = G4Transform3D(),
    const G4ModelingParameters* = 0,
    G4bool useFullExtent = false,
    const std::vector<G4PhysicalVolumeNodeID>& baseFullPVPath =
    std::vector<G4PhysicalVolumeNodeID>());
 
   virtual ~G4PhysicalVolumeModel ();
 
   void DescribeYourselfTo (G4VGraphicsScene&);
   // The main task of a model is to describe itself to the graphics scene
   // handler (a object which inherits G4VSceneHandler, which inherits
   // G4VGraphicsScene).
 
   G4String GetCurrentDescription () const;
   // A description which depends on the current state of the model.
 
   G4String GetCurrentTag () const;
   // A tag which depends on the current state of the model.
 
   G4VPhysicalVolume* GetTopPhysicalVolume () const {return fpTopPV;}
 
   G4int GetRequestedDepth () const {return fRequestedDepth;}
 
   const G4VSolid* GetClippingSolid () const
   {return fpClippingSolid;}
 
   G4int GetCurrentDepth() const {return fCurrentDepth;}
   // Current depth in geom. hierarchy.
 
   const G4Transform3D& GetTransformation() const {return fTransform;}
   // Initial transformation
 
   G4VPhysicalVolume* GetCurrentPV() const {return fpCurrentPV;}
   // Current physical volume.
 
   G4int GetCurrentPVCopyNo() const {return fCurrentPVCopyNo;}
   // Current copy number.
 
   G4LogicalVolume* GetCurrentLV() const {return fpCurrentLV;}
   // Current logical volume.
 
   G4Material* GetCurrentMaterial() const {return fpCurrentMaterial;}
   // Current material.
 
   const G4Transform3D& GetCurrentTransform() const {return fCurrentTransform;}
   // Current transform.
 
   const std::vector<G4PhysicalVolumeNodeID>& GetBaseFullPVPath() const
   {return fBaseFullPVPath;}
   // Base for this G4PhysicalVolumeModel. It can be empty, which would be the
   // case for the world volume. But the user may create a G4PhysicalVolumeModel
   // for a volume anywhere in the tree, in which case the user must provide
   // the transform (in the constructor) and the base path (SetBaseFullPVPath).
 
   const std::vector<G4PhysicalVolumeNodeID>& GetFullPVPath() const
   {return fFullPVPath;}
   // Vector of physical volume node identifiers for the current
   // touchable.  It is its path in the geometry hierarchy, similar to
   // the concept of "touchable history" available from the navigator
   // during tracking.
 
   const std::vector<G4PhysicalVolumeNodeID>& GetDrawnPVPath() const
   {return fDrawnPVPath;}
   // Path of the current drawn (non-culled) touchable in terms of
   // drawn (non-culled) ancestors.  It is a vector of physical volume
   // node identifiers corresponding to the geometry hierarchy actually
   // selected, i.e., with "culled" volumes NOT included.
 
   static G4ModelingParameters::PVNameCopyNoPath GetPVNameCopyNoPath
   (const std::vector<G4PhysicalVolumeNodeID>&);
   // Converts to PVNameCopyNoPath
 
   static G4String GetPVNamePathString(const std::vector<G4PhysicalVolumeNodeID>&);
   // Converts to path string, e.g., " World 0 Envelope 0 Shape1 0".
   // Note leading space character.
 
   const std::map<G4String,G4AttDef>* GetAttDefs() const;
   // Attribute definitions for current solid.
 
   std::vector<G4AttValue>* CreateCurrentAttValues() const;
   // Attribute values for current solid.  Each must refer to an
   // attribute definition in the above map; its name is the key.  The
   // user must test the validity of this pointer (it must be non-zero
   // and conform to the G4AttDefs, which may be checked with
   // G4AttCheck) and delete the list after use.  See
   // G4XXXStoredSceneHandler::PreAddSolid for how to access and
   // G4VTrajectory::ShowTrajectory for an example of the use of
   // G4Atts.
 
   const std::map<G4int,G4int>& GetNumberOfTouchables() const {return fNTouchables;}
   // Total number of touchables drawn at each depth
   
   void SetRequestedDepth (G4int requestedDepth) {
     fRequestedDepth = requestedDepth;
   }
 
   void SetClippingSolid (G4VSolid* pClippingSolid) {
     fpClippingSolid = pClippingSolid;
   }
 
   void SetClippingMode (ClippingMode mode) {
     fClippingMode = mode;
   }
 
   G4bool Validate (G4bool warn);
   // Validate, but allow internal changes (hence non-const function).
 
   void Abort () const {fAbort = true;}
   // Abort all further traversing.
 
   void CurtailDescent() const {fCurtailDescent = true;}
   // Curtail descent of current branch.
 
   void CalculateExtent ();
 
 protected:
 
   void VisitGeometryAndGetVisReps (G4VPhysicalVolume*,
                    G4int requestedDepth,
                    const G4Transform3D&,
                    G4VGraphicsScene&);
 
   void DescribeAndDescend (G4VPhysicalVolume*,
                G4int requestedDepth,
                G4LogicalVolume*,
                G4VSolid*,
                G4Material*,
                const G4Transform3D&,
                G4VGraphicsScene&);
 
   virtual void DescribeSolid (const G4Transform3D& theAT,
                   G4VSolid* pSol,
                   const G4VisAttributes* pVisAttribs,
                   G4VGraphicsScene& sceneHandler);
 
   /////////////////////////////////////////////////////////
   // Data members...
 
   G4VPhysicalVolume* fpTopPV;        // The physical volume.
   G4String           fTopPVName;     // ...of the physical volume.
   G4int              fTopPVCopyNo;   // ...of the physical volume.
   G4int              fRequestedDepth;
                      // Requested depth of geom. hierarchy search.
   G4bool             fUseFullExtent; // ...if requested.
   G4Transform3D      fTransform;     // Initial transform
   G4int              fCurrentDepth;  // Current depth of geom. hierarchy.
   G4VPhysicalVolume* fpCurrentPV;    // Current physical volume.
   G4int              fCurrentPVCopyNo; // Current copy number.
   G4LogicalVolume*   fpCurrentLV;    // Current logical volume.
   G4Material*        fpCurrentMaterial;  // Current material.
   G4Transform3D      fCurrentTransform;  // Current transform.
   std::vector<G4PhysicalVolumeNodeID> fBaseFullPVPath; // Base. May be empty.
   std::vector<G4PhysicalVolumeNodeID> fFullPVPath;     // Starts from base.
   std::vector<G4PhysicalVolumeNodeID> fDrawnPVPath;    // Omits culled volumes.
   mutable G4bool     fAbort;         // Abort all further traversing.
   mutable G4bool     fCurtailDescent;// Can be set to curtail descent.
   G4VSolid*          fpClippingSolid;
   ClippingMode       fClippingMode;
   G4int              fNClippers;     // No of clipping/cutting solids - only 0 or 1 allowed
   std::map<G4int,G4int> fNTouchables;   // No of touchables at each depth
 
 private:
 
   // Private copy constructor and assigment operator - copying and
   // assignment not allowed.  Keeps CodeWizard happy.
   G4PhysicalVolumeModel (const G4PhysicalVolumeModel&);
   G4PhysicalVolumeModel& operator = (const G4PhysicalVolumeModel&);
 };
 
 std::ostream& operator<<
 (std::ostream& os, const G4PhysicalVolumeModel::G4PhysicalVolumeNodeID&);
 
 std::ostream& operator<<
 (std::ostream& os, const std::vector<G4PhysicalVolumeModel::G4PhysicalVolumeNodeID>&);
 
 #endif

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