diff --git a/EGkFrame3d.h b/EGkFrame3d.h
index c55c637..377478d 100644
--- a/EGkFrame3d.h
+++ b/EGkFrame3d.h
@@ -33,6 +33,9 @@ class EGK_EXPORT Frame3d
       Frame3d( void)
          : m_nType( TOP), m_nZType( TOP), m_ptOrig( ORIG),
            m_vtVersX( X_AX), m_vtVersY( Y_AX), m_vtVersZ( Z_AX) {}
+      Frame3d( const Point3d& ptOrig)
+         : m_nType( TOP), m_nZType( TOP), m_ptOrig( ptOrig),
+           m_vtVersX( X_AX), m_vtVersY( Y_AX), m_vtVersZ( Z_AX) {}
       bool Set( const Point3d& ptOrig, const Vector3d& vtDirX, 
                 const Vector3d& vtDirY, const Vector3d& vtDirZ) ;
       bool Set( const Point3d& ptOrig, const Point3d& ptOnX, const Point3d& ptNearY) ;
diff --git a/EGkGdbConst.h b/EGkGdbConst.h
index 88c02ca..cf8ae7d 100644
--- a/EGkGdbConst.h
+++ b/EGkGdbConst.h
@@ -17,7 +17,9 @@
 //----------------- Costanti generali ------------------------------------------
 const int GDB_ID_ROOT = 0 ;
 const int GDB_ID_NULL = -1 ;
-
+const int GDB_BEFORE = -1 ;
+const int GDB_SON = 0 ;
+const int GDB_AFTER = +1 ;
 
 //----------------- Costanti tipo oggetti del DB geometrico --------------------
 enum GdbType { GDB_TY_NONE =  0,
diff --git a/EGkGdbIterator.h b/EGkGdbIterator.h
index 1a13e5d..af0c96f 100644
--- a/EGkGdbIterator.h
+++ b/EGkGdbIterator.h
@@ -45,6 +45,7 @@ class __declspec( novtable) IGdbIterator
       virtual IGeoFrame3d* GetGeoFrame( void) = 0 ;
       virtual bool GetGroupFrame( Frame3d& frGlob) const = 0 ;
       virtual bool GetGroupGlobFrame( Frame3d& frGlob) const = 0 ;
+      virtual int  GetGroupObjs( void) const = 0 ;
       virtual int  GetId( void) const = 0 ;
       virtual int  GetParentId( void) const = 0 ;
       virtual bool GetGlobFrame( Frame3d& frGlob) const = 0 ;
@@ -78,9 +79,11 @@ class __declspec( novtable) IGdbIterator
       virtual bool GetCalcMaterial( Color& cCol) const = 0 ;
       virtual bool SetName( const std::string& sName) = 0 ;
       virtual bool GetName( std::string& sName) const = 0 ;
+      virtual bool ExistsName( void) const = 0 ;
       virtual bool RemoveName( void) = 0 ;
       virtual bool SetInfo( const std::string& sKey, const std::string& sInfo) = 0 ;
       virtual bool GetInfo( const std::string& sKey, std::string& sInfo) const = 0 ;
+      virtual bool ExistsInfo( const std::string& sKey) const = 0 ;
       virtual bool RemoveInfo( const std::string& sKey) = 0 ;
 } ;
 
diff --git a/EGkGeomDB.h b/EGkGeomDB.h
index 86249c8..f29a89b 100644
--- a/EGkGeomDB.h
+++ b/EGkGeomDB.h
@@ -1,13 +1,14 @@
 //----------------------------------------------------------------------------
 //  EgalTech 2013-2014
 //----------------------------------------------------------------------------
-// File : EGkGeomDB.h           Data : 26.04.14          Versione : 1.5d7
+// File : EGkGeomDB.h           Data : 21.05.14          Versione : 1.5e8
 // Contenuto : Dichiarazione della interfaccia IGeomDB.
 //
 //
 //
 // Modifiche : 24.11.13 DS Creazione modulo.
 //             26.04.14 DS Agg. gestione libreria materiali.
+//             21.05.14 DS Agg. GotoFirst/Next/Last/Prev.
 //
 //----------------------------------------------------------------------------
 
@@ -39,7 +40,13 @@ class __declspec( novtable) IGeomDB
       virtual bool Save( const std::string& sFileOut, bool bBinary = true) const = 0 ;
       virtual bool ExistsObj( int nId) const = 0 ;
       virtual int  AddGroup( int nId, int nParentId, const Frame3d& frFrame) = 0 ;
+      virtual int  InsertGroup( int nId, int nRefId, int nSonBeforeAfter, const Frame3d& frFrame) = 0 ;
       virtual int  AddGeoObj( int nId, int nParentId, IGeoObj* pGeoObj) = 0 ;
+      virtual int  InsertGeoObj( int nId, int nRefId, int nSonBeforeAfter, IGeoObj* pGeoObj) = 0 ;
+      virtual int  GetFirstInGroup( int nIdGroup) const = 0 ;
+      virtual int  GetNext( int nId) const = 0 ;
+      virtual int  GetLastInGroup( int nIdGroup) const = 0 ;
+      virtual int  GetPrev( int nId) const = 0 ;
       virtual int  GetGdbType( int nId) const = 0 ;
       virtual IGeoObj* GetGeoObj( int nId) = 0 ;
       virtual IGeoFrame3d* GetGeoFrame( int nId) = 0 ;
@@ -112,9 +119,11 @@ class __declspec( novtable) IGeomDB
       virtual bool GetCalcMaterial( int nId, Color& cCol) const = 0 ;
       virtual bool SetName( int nId, const std::string& sName) = 0 ;
       virtual bool GetName( int nId, std::string& sName) const = 0 ;
+      virtual bool ExistsName( int nId) const = 0 ;
       virtual bool RemoveName( int nId) = 0 ;
       virtual bool SetInfo( int nId, const std::string& sKey, const std::string& sInfo) = 0 ;
       virtual bool GetInfo( int nId, const std::string& sKey, std::string& sInfo) const = 0 ;
+      virtual bool ExistsInfo( int nId, const std::string& sKey) const = 0 ;
       virtual bool RemoveInfo( int nId, const std::string& sKey) = 0 ;
      // material library
       virtual int  AddMaterial( const std::string& sName, const Material& matM) = 0 ;
diff --git a/EGkPointGrid3d.h b/EGkPointGrid3d.h
index 83d2be7..d62a3ac 100644
--- a/EGkPointGrid3d.h
+++ b/EGkPointGrid3d.h
@@ -29,6 +29,7 @@
 class PointGrid3d
 {
    public :
+      EGK_EXPORT PointGrid3d( void) : m_dCellDim( 10 * EPS_SMALL), m_dInvCellDim( 1 / m_dCellDim)  {}
       EGK_EXPORT bool Init( int nBuckets, double dCellDim = 10 * EPS_SMALL) ;
       EGK_EXPORT bool InsertPoint( const Point3d& ptP, int nId) ;
       EGK_EXPORT bool Find( const Point3d& ptTest, double dTol, INTVECTOR& vnIds) ;
@@ -43,5 +44,6 @@ class PointGrid3d
 
    private :
       double      m_dCellDim ;
+      double      m_dInvCellDim ;
       IPNTI_UMMAP m_MMap ;
 } ;