TGeometry

class TGeometry : public TNamed

    public:

                        TGeometry()
                        TGeometry(const char* name, const char* title)
                        TGeometry(const TGeometry&)
                virtual ~TGeometry()
           virtual void Browse(TBrowser* b)
           virtual void cd(const char* path = "0")
         static TClass* Class()
           virtual void Draw(Option_t* option = "")
       virtual TObject* FindObject(const char* name) const
       virtual TObject* FindObject(const TObject* obj) const
                  Int_t GeomLevel() const
      static TObjArray* Get(const char* name)
                Float_t GetBomb() const
            TRotMatrix* GetCurrentMatrix() const
                 TNode* GetCurrentNode() const
            TRotMatrix* GetCurrentPosition(Double_t* x, Double_t* y, Double_t* z) const
            TRotMatrix* GetCurrentPosition(Float_t* x, Float_t* y, Float_t* z) const
                 Bool_t GetCurrentReflection() const
             THashList* GetListOfMaterials() const
             THashList* GetListOfMatrices() const
                 TList* GetListOfNodes() const
             THashList* GetListOfShapes() const
             TMaterial* GetMaterial(const char* name) const
             TMaterial* GetMaterialByNumber(Int_t number) const
                 TNode* GetNode(const char* name) const
            TRotMatrix* GetRotMatrix(const char* name) const
            TRotMatrix* GetRotMatrixByNumber(Int_t number) const
                TShape* GetShape(const char* name) const
                TShape* GetShapeByNumber(Int_t number) const
        virtual TClass* IsA() const
         virtual Bool_t IsFolder() const
           virtual void Local2Master(Double_t* local, Double_t* master)
           virtual void Local2Master(Float_t* local, Float_t* master)
           virtual void ls(Option_t* option = "rsn2") const
           virtual void Master2Local(Double_t* master, Double_t* local)
           virtual void Master2Local(Float_t* master, Float_t* local)
           virtual void Node(const char* name, const char* title, const char* shapename, Double_t x = 0, Double_t y = 0, Double_t z = 0, const char* matrixname = "", Option_t* option = "")
             TGeometry& operator=(const TGeometry&)
          virtual Int_t PopLevel()
          virtual Int_t PushLevel()
           virtual void RecursiveRemove(TObject* obj)
           virtual void SetBomb(Float_t bomb = 1.4)
           virtual void SetCurrentNode(TNode* node)
           virtual void SetGeomLevel(Int_t level = 0)
           virtual void SetMatrix(TRotMatrix* matrix = 0)
           virtual void SetPosition(TRotMatrix* matrix, Double_t x = 0, Double_t y = 0, Double_t z = 0)
           virtual void SetPosition(TRotMatrix* matrix, Float_t x, Float_t y, Float_t z)
           virtual void SetPosition(Double_t x, Double_t y, Double_t z)
           virtual void SetPosition(Float_t x, Float_t y, Float_t z)
           virtual void ShowMembers(TMemberInspector& insp, char* parent)
           virtual void Streamer(TBuffer& b)
                   void StreamerNVirtual(TBuffer& b)
           virtual void UpdateMatrix(TNode* node)
           virtual void UpdateTempMatrix(Double_t x = 0, Double_t y = 0, Double_t z = 0, TRotMatrix* matrix = 0)
           virtual void UpdateTempMatrix(Double_t x, Double_t y, Double_t z, Double_t* matrix, Bool_t isReflection = kFALSE)
            static void UpdateTempMatrix(Double_t* dx1, Double_t* rmat1, Double_t x, Double_t y, Double_t z, Double_t* matrix, Double_t* dxnew, Double_t* rmatnew)

Data Members

    private:

        THashList* fMaterials           ->Collection of materials
        THashList* fMatrices            ->Collection of rotation matrices
        THashList* fShapes              ->Collection of shapes
            TList* fNodes               ->Collection of nodes
       TRotMatrix* fMatrix              !Pointers to current rotation matrices
            TNode* fCurrentNode         !Pointer to current node
       TMaterial** fMaterialPointer     !Pointers to materials
      TRotMatrix** fMatrixPointer       !Pointers to rotation matrices
          TShape** fShapePointer        !Pointers to shapes
           Float_t fBomb                Bomb factor for exploded geometry
             Int_t fGeomLevel           !
          Double_t fX                   !
          Double_t fY                   ! The global translation of the current node
          Double_t fZ                   !
          Double_t fTranslation[20][3]  !
          Double_t fRotMatrix[20][9]    !
            Bool_t fIsReflection[20]    !

Class Description

*-*-*-*-*-*-*-*-*-*-*-* T G E O M E T R Y  description *-*-*-*-*-*-*-*-*-*-*
*-*                    ===============================
*-*
*-*    The Geometry class describes the geometry of a detector.
*-*    The current implementation supports the GEANT3 style description.
*-*    A special program provided in the ROOT utilities (toroot) can be used
*-*    to automatically translate a GEANT detector geometry into a ROOT geometry.
*-*
*-*   a Geometry object is entered into the list of geometries into the
*-*     ROOT main object (see TROOT description) when the TGeometry
*-*     constructor is invoked.
*-*   Several geometries may coexist in memory.
*-*
*-*   A Geometry object consist of the following linked lists:
*-*        - the TMaterial list (material definition only).
*-*        - the TRotmatrix list (Rotation matrices definition only).
*-*        - the TShape list (volume definition only).
*-*        - the TNode list assembling all detector elements.
*-*
*-*   Only the Build and Draw functions for a geometry are currently supported.
*-*
*-*---------------------------------------------------------------------------
*-*- The conversion program from Geant to Root has been added in the list
*-*  of utilities in utils directory.(see g2root)
*-*  The executable module of g2root can be found in $ROOTSYS/bin/g2root.
*-*
*-*  To use this conversion program, type the shell command:
*-*        g2root  geant_rzfile macro_name
*-*
*-*  for example
*-*        g2root na49.geom na49.C
*-*  will convert the GEANT RZ file na49.geom into a ROOT macro na49.C
*-*
*-*  To generate the Geometry structure within Root, do:
*-*    Root > .x na49.C
*-*    Root > na49.Draw()
*-*    Root > wh.x3d()    (this invokes the 3-d Root viewver)
*-*    Root > TFile gna49("na49.root","NEW")  //open a new root file
*-*    Root > na49.Write()                    //Write the na49 geometry structure
*-*    Root > gna49.Write()                   //Write all keys (in this case only one)
*-*  Note: all keys are also written on closing of the file, gna49.Close or
*-*  when the program exits, Root closes all open files correctly.
*-*  Once this file has been written, in a subsequent session, simply do:
*-*    Root > TFile gna49("na49.root")
*-*    Root > na49.Draw()
*-*
*-*  The figure below shows the geometry above using the x3d viewer.
*-*  This x3d viewver is invoked by selecting "View x3d" in the View menu
*-*  of a canvas (See example of this tool bar in TCanvas).

*-*
*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*

*-*-*-*-*-*-*-*-*-*-*-*-*Geometry default constructor*-*-*-*-*-*-*-*-*-*-*-*

*-*-*-*-*-*-*-*-*-*-*-*-*Geometry normal constructor*-*-*-*-*-*-*-*-*-*-*-*
*-*                      ===========================

*-*-*-*-*-*-*-*-*-*-*-*-*Geometry default destructor*-*-*-*-*-*-*-*-*-*-*-*
*-*                      ========================

*-*-*-*-*-*Change Current Geometry to this*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
*-*        ===============================

*-*-*-*-*-*-*-*-*-*-*-*-*Draw this Geometry*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
*-*                      ==================

 find object in a geometry node, material, etc

 search object identified by name in the geometry tree

 Static function called by TROOT to search name in the geometry.
 Returns a TObjArray containing a pointer to the found object
 and a pointer to the container where the object was found.

*-*-*-*-*-*-*-*-*Return pointer to Material with name*-*-*-*-*-*-*-*-*
*-*              ====================================

*-*-*-*-*-*-*-*-*Return pointer to Material with number*-*-*-*-*-*-*-*-*
*-*              ======================================

*-*-*-*-*-*-*Return pointer to node with name in the geometry tree*-*-*-*-*
*-*          =====================================================

*-*-*-*-*-*-*-*-*Return pointer to RotMatrix with name*-*-*-*-*-*-*-*-*-*
*-*              =====================================

*-*-*-*-*-*-*-*-*Return pointer to RotMatrix with number*-*-*-*-*-*-*-*-*-*
*-*              =======================================

*-*-*-*-*-*-*-*-*Return pointer to Shape with name*-*-*-*-*-*-*-*-*-*
*-*              =================================

*-*-*-*-*-*-*-*-*Return pointer to Shape with number*-*-*-*-*-*-*-*-*-*
*-*              ===================================

*-*-*-*-*Convert one point from local system to master reference system*-*-*
*-*      ==============================================================

  Note that before invoking this function, the global rotation matrix
  and translation vector for this node must have been computed.
  This is automatically done by the Paint functions.
  Otherwise TNode::UpdateMatrix should be called before.

*-*-*-*-*Convert one point from local system to master reference system*-*-*
*-*      ==============================================================

  Note that before invoking this function, the global rotation matrix
  and translation vector for this node must have been computed.
  This is automatically done by the Paint functions.
  Otherwise TNode::UpdateMatrix should be called before.

*-*-*-*-*-*-*-*-*-*-*-*List this geometry*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
*-*                   ===================

*-*-*-*-*Convert one point from master system to local reference system*-*-*
*-*      ==============================================================

  Note that before invoking this function, the global rotation matrix
  and translation vector for this node must have been computed.
  This is automatically done by the Paint functions.
  Otherwise TNode::UpdateMatrix should be called before.

*-*-*-*-*Convert one point from master system to local reference system*-*-*
*-*      ==============================================================

  Note that before invoking this function, the global rotation matrix
  and translation vector for this node must have been computed.
  This is automatically done by the Paint functions.
  Otherwise TNode::UpdateMatrix should be called before.

*-*-*-*-*-*-*-*Add a node to the current node in this geometry*-*-*-*-*-*-*
*-*            ===============================================

*-*-*-*-*-*-*-*Recursively remove object from a Geometry list*-*-*-*-*-*-*-*
*-*            =========================================

*-*-*-*-*-*-*-*-*Stream a class object*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
*-*              =========================================

    Update global rotation matrix/translation vector for this node
   this function must be called before invoking Local2Master

*-*-*-*-*-*-*Compute new translation vector and global matrix*-*-*-*-*-*-*-*
*-*          ================================================
*-*
*-*  dx      old translation vector
*-*  rmat    old global matrix
*-*  x,y,z   offset of new local system with respect to mother
*-*  dxnew   new translation vector
*-*  rmatnew new global rotation matrix
*-*
*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-

Inline Functions

            Float_t GetBomb() const
              Int_t GeomLevel() const
         THashList* GetListOfShapes() const
             TList* GetListOfNodes() const
         THashList* GetListOfMaterials() const
         THashList* GetListOfMatrices() const
             TNode* GetCurrentNode() const
        TRotMatrix* GetCurrentMatrix() const
        TRotMatrix* GetCurrentPosition(Double_t* x, Double_t* y, Double_t* z) const
        TRotMatrix* GetCurrentPosition(Float_t* x, Float_t* y, Float_t* z) const
             Bool_t GetCurrentReflection() const
             Bool_t IsFolder() const
              Int_t PushLevel()
              Int_t PopLevel()
               void SetBomb(Float_t bomb = 1.4)
               void SetCurrentNode(TNode* node)
               void SetGeomLevel(Int_t level = 0)
               void SetMatrix(TRotMatrix* matrix = 0)
               void SetPosition(TRotMatrix* matrix, Double_t x = 0, Double_t y = 0, Double_t z = 0)
               void SetPosition(TRotMatrix* matrix, Float_t x, Float_t y, Float_t z)
               void SetPosition(Double_t x, Double_t y, Double_t z)
               void SetPosition(Float_t x, Float_t y, Float_t z)
            TClass* Class()
            TClass* IsA() const
               void ShowMembers(TMemberInspector& insp, char* parent)
               void StreamerNVirtual(TBuffer& b)
          TGeometry TGeometry(const TGeometry&)
         TGeometry& operator=(const TGeometry&)