diff --git a/CurveBezier.cpp b/CurveBezier.cpp
index 84d01ff..03b998a 100644
--- a/CurveBezier.cpp
+++ b/CurveBezier.cpp
@@ -15,10 +15,10 @@
 #include "stdafx.h"
 #include "DllMain.h"
 #include "CurveBezier.h"
+#include "DistPointLine.h"
 #include "GeoObjFactory.h"
 #include "\EgtDev\Include\EGnStringUtils.h"
 #include "\EgtDev\Include\EGkCurveArc.h"
-#include "\EgtDev\Include\EGkDistPointLine.h"
 #include <new>
 
 using namespace std ;
diff --git a/DistPointArc.cpp b/DistPointArc.cpp
index 2d0c3ce..a7d89af 100644
--- a/DistPointArc.cpp
+++ b/DistPointArc.cpp
@@ -13,14 +13,17 @@
 
 //--------------------------- Include ----------------------------------------
 #include "stdafx.h"
-#include "\EgtDev\Include\EGkDistPointArc.h"
+#include "DistPointArc.h"
 
 
 //----------------------------------------------------------------------------
 DistPointArc::DistPointArc( const Point3d& ptP, const ICurveArc& arArc)
 {
+  // distanza non calcolata
+   m_dDist = - 1 ;
+
    if ( ! arArc.IsValid())
-      m_dDist = - 1 ;
+      return ;
 
   // se circonferenza
    if ( arArc.IsACircle())
@@ -31,10 +34,8 @@ DistPointArc::DistPointArc( const Point3d& ptP, const ICurveArc& arArc)
       DistPointFlatArc( ptP, arArc) ; 
 
   // altrimenti caso generico
-   else {
-
-   }
-
+   else
+      DistPointHelix( ptP, arArc) ; 
 }
 
 //----------------------------------------------------------------------------
@@ -104,6 +105,13 @@ DistPointArc::DistPointFlatArc( const Point3d& ptP, const ICurveArc& arArc)
    }
 }
 
+//----------------------------------------------------------------------------
+void
+DistPointArc::DistPointHelix( const Point3d& ptP, const ICurveArc& arArc)
+{
+
+}
+
 //----------------------------------------------------------------------------
 bool
 DistPointArc::GetSqDist( double& dSqDist)
diff --git a/DistPointArc.h b/DistPointArc.h
new file mode 100644
index 0000000..711da5c
--- /dev/null
+++ b/DistPointArc.h
@@ -0,0 +1,54 @@
+//----------------------------------------------------------------------------
+//  EgalTech 2013-2014
+//----------------------------------------------------------------------------
+// File : DistPointArc.h      Data : 28.12.13          Versione : 1.4l5
+// Contenuto : Dichiarazione della classe distanza punto da circonferenza/arco.
+//
+//
+//
+// Modifiche : 28.12.13 DS Creazione modulo.
+//
+//
+//----------------------------------------------------------------------------
+
+#pragma once
+
+#include "/EgtDev/Include/EGkPoint3d.h"
+#include "/EgtDev/Include/EGkCurveArc.h"
+
+//----------------------- Macro per import/export ----------------------------
+#undef EGK_EXPORT
+#if defined( I_AM_EGK)            // da definirsi solo nella DLL
+   #define EGK_EXPORT __declspec( dllexport)
+#else
+   #define EGK_EXPORT __declspec( dllimport)
+#endif
+
+
+//-----------------------------------------------------------------------------
+class DistPointArc
+{
+   friend class DistPointCurve ;
+
+   public :
+      EGK_EXPORT DistPointArc( const Point3d& ptP, const ICurveArc& arArc) ;
+
+   public :
+      EGK_EXPORT bool GetSqDist( double& dSqDist) ;
+      EGK_EXPORT bool GetDist( double& dDist) ;
+      EGK_EXPORT bool GetPointMinDist( Point3d& ptMinDist, bool* pbDet = nullptr) ;
+      EGK_EXPORT bool GetParamAtPointMinDist( double& dParam, bool* pbDet = nullptr) ;
+
+   private :
+      DistPointArc( void) ;
+      void DistPointCircle( const Point3d& ptP, const ICurveArc& arArc) ;
+      void DistPointFlatArc( const Point3d& ptP, const ICurveArc& arArc) ;
+      void DistPointHelix( const Point3d& ptP, const ICurveArc& arArc) ;
+
+   private :
+      bool    m_bDet ;
+      double  m_dDist ;
+      double  m_dParam ;
+      Point3d m_ptMinDist ;
+} ;
+
diff --git a/DistPointCrvBezier.cpp b/DistPointCrvBezier.cpp
new file mode 100644
index 0000000..f0583f4
--- /dev/null
+++ b/DistPointCrvBezier.cpp
@@ -0,0 +1,177 @@
+//----------------------------------------------------------------------------
+//  EgalTech 2013-2013
+//----------------------------------------------------------------------------
+// File : DistPointCrvBezier.cpp     Data : 02.01.14        Versione : 1.5a1
+// Contenuto : Implementazione della classe distanza punto da curva di Bezier.
+//
+//
+//
+// Modifiche : 02.01.14 DS Creazione modulo.
+//
+//
+//----------------------------------------------------------------------------
+
+//--------------------------- Include ----------------------------------------
+#include "stdafx.h"
+#include "DistPointCrvBezier.h"
+#include "DistPointLine.h"
+#include "\EgtDev\Include\EgtTrace.h"
+
+
+//----------------------------------------------------------------------------
+DistPointCrvBezier::DistPointCrvBezier( const Point3d& ptP, const ICurveBezier& CrvBez)
+{
+   const double LIN_TOL_APPROX = 1 ;
+   const double ANG_TOL_APPROX_DEG = 45 ;
+
+
+  // distanza non calcolata
+   m_dDist = - 1 ;
+
+   if ( ! CrvBez.IsValid())
+      return ;
+
+  // creo una polilinea di approssimazione
+   PolyLine PL ;
+   if ( ! CrvBez.ApproxWithLines( LIN_TOL_APPROX, ANG_TOL_APPROX_DEG, PL))
+      return ;
+
+  // cerco la minima distanza per la polilinea
+   double dSqDist ;
+   double dMinPar ;
+   double dMinParIni ;
+   double dMinParFin ;
+   double dPar ;
+   double dUIni ;
+   double dUFin ;
+   Point3d ptMinDist ;
+   Point3d ptIni ;
+   Point3d ptFin ;
+   bool bFound = false ;
+   bool bOnEnd = false ;
+   double dSqMinDist = INFINITO * INFINITO ;
+   for ( bool bLine = PL.GetFirstULine( &dUIni, &ptIni, &dUFin, &ptFin) ;
+         bLine ;
+         bLine = PL.GetNextULine( &dUIni, &ptIni, &dUFin, &ptFin)) {
+     // calcolo la distanza del punto dal segmento
+      DistPointLine dstPtLn( ptP, ptIni, ptFin) ;
+      if ( dstPtLn.GetSqDist( dSqDist)  &&  dSqDist < dSqMinDist) {
+         bFound = true ;
+         dSqMinDist = dSqDist ;
+         dstPtLn.GetPointMinDist( ptMinDist) ;
+         dstPtLn.GetParamAtPointMinDist( dPar) ;
+         dMinPar = ( 1 - dPar) * dUIni + dPar * dUFin ;
+         dMinParIni = dUIni ;
+         dMinParFin = dUFin ;
+         bOnEnd = ( AreSamePointNear( ptMinDist, ptFin)) ;
+      }
+      else if ( bOnEnd) {
+         bOnEnd = false ;
+         dMinParFin = dUFin ;
+      }
+   }
+   if ( ! bFound)
+      return ;
+
+  // raffino i punti trovati (con algoritmo tipo Newton da TheNurbsBook pag 230)
+   const int MAX_COUNT = 10 ;
+   double dMinDist = sqrt( dSqMinDist) ;
+   double dPrevPar ;
+   double dTemp ;
+   double dSqCosA ;
+   Point3d ptQ ;
+   Vector3d vtDer1 ;
+   Vector3d vtDer2 ;
+   Vector3d vtDiff ;
+   int nCount = 0 ;
+   dPar = dMinPar ;
+   do {
+     // contatore iterazioni
+      nCount ++ ;
+     // calcolo P, D1 e D2
+      CrvBez.GetPointD1D2( dPar, ICurve::FROM_MINUS, ptQ, &vtDer1, &vtDer2) ;
+     // se D1 nulla e distanza sicuramente non minima, riprovo sul centro dell'intervallo
+      if ( vtDer1.IsZero()  &&  Dist( ptQ, ptP) > __min( 1.2 * dMinDist, dMinDist + LIN_TOL_APPROX)) {
+         dPar = 0.5 * ( dMinParIni + dMinParFin) ;
+         CrvBez.GetPointD1D2( dPar, ICurve::FROM_MINUS, ptQ, &vtDer1, &vtDer2) ;
+      }
+     // vettore dal punto al piede sulla curva
+      vtDiff = ptQ - ptP ;
+     // angolo tra vettore e tangente
+      dTemp = vtDer1 * vtDiff ;
+      if ( fabs( dTemp) > EPS_ZERO) 
+         dSqCosA = dTemp * dTemp / ( vtDer1.SqLen() * vtDiff.SqLen()) ;
+      else
+         dSqCosA = 0 ;
+     // stima prossimo valore del parametro (Newton : Unext = U - F(U) / F'(U))
+      dPrevPar = dPar ;
+      dTemp = vtDer2 * vtDiff + vtDer1.SqLen() ;
+      if ( fabs( dTemp) > EPS_ZERO)
+         dPar = dPrevPar - ( vtDer1 * vtDiff) / dTemp ;
+     // clipping parametro in 0-1
+      if ( dPar < dMinParIni)
+         dPar = dMinParIni ;
+      else if ( dPar > dMinParFin)
+         dPar = dMinParFin ;
+   }  while ( nCount < MAX_COUNT  &&  fabs( dPar - dPrevPar) > EPS_ZERO  &&
+              fabs( dSqCosA) > COS_ORTO_ANG_ZERO * COS_ORTO_ANG_ZERO) ;
+
+#if defined( _DEBUG)
+   if ( nCount == MAX_COUNT)
+      EGT_TRACE( "Exceeded MAX_COUNT in PolishingDistPointCrv.") ;
+#endif
+
+  // assegno i dati
+   m_bDet = true ;
+   m_dDist = Dist( ptP, ptQ) ;
+   m_dParam = dPrevPar ;
+   m_ptMinDist = ptQ ;
+}
+
+//----------------------------------------------------------------------------
+bool
+DistPointCrvBezier::GetSqDist( double& dSqDist)
+{
+   if ( m_dDist < 0)
+      return false ;
+
+   dSqDist = m_dDist * m_dDist ;
+   return true ;
+}
+
+//----------------------------------------------------------------------------
+bool
+DistPointCrvBezier::GetDist( double& dDist)
+{
+   if ( m_dDist < 0)
+      return false ;
+
+   dDist = m_dDist ;
+   return true ;
+}
+
+//----------------------------------------------------------------------------
+bool
+DistPointCrvBezier::GetPointMinDist( Point3d& ptMinDist, bool* pbDet)
+{
+   if ( m_dDist < 0)
+      return false ;
+
+   ptMinDist = m_ptMinDist ;
+   if ( pbDet != nullptr)
+      *pbDet = m_bDet ;
+   return true ;
+}
+
+//----------------------------------------------------------------------------
+bool
+DistPointCrvBezier::GetParamAtPointMinDist( double& dParam, bool* pbDet)
+{
+   if ( m_dDist < 0)
+      return false ;
+
+   dParam = m_dParam ;
+   if ( pbDet != nullptr)
+      *pbDet = m_bDet ;
+   return true ;
+}
diff --git a/DistPointCrvBezier.h b/DistPointCrvBezier.h
new file mode 100644
index 0000000..3ab812a
--- /dev/null
+++ b/DistPointCrvBezier.h
@@ -0,0 +1,51 @@
+//----------------------------------------------------------------------------
+//  EgalTech 2013-2014
+//----------------------------------------------------------------------------
+// File : DistPointCrvBezier.h     Data : 02.01.14      Versione : 1.5a1
+// Contenuto : Dichiarazione della classe distanza punto da curva di Bezier.
+//
+//
+//
+// Modifiche : 02.01.14 DS Creazione modulo.
+//
+//
+//----------------------------------------------------------------------------
+
+#pragma once
+
+#include "/EgtDev/Include/EGkPoint3d.h"
+#include "/EgtDev/Include/EGkCurveBezier.h"
+
+//----------------------- Macro per import/export ----------------------------
+#undef EGK_EXPORT
+#if defined( I_AM_EGK)            // da definirsi solo nella DLL
+   #define EGK_EXPORT __declspec( dllexport)
+#else
+   #define EGK_EXPORT __declspec( dllimport)
+#endif
+
+
+//-----------------------------------------------------------------------------
+class DistPointCrvBezier
+{
+   friend class DistPointCurve ;
+
+   public :
+      EGK_EXPORT DistPointCrvBezier( const Point3d& ptP, const ICurveBezier& CrvBez) ;
+
+   public :
+      EGK_EXPORT bool GetSqDist( double& dSqDist) ;
+      EGK_EXPORT bool GetDist( double& dDist) ;
+      EGK_EXPORT bool GetPointMinDist( Point3d& ptMinDist, bool* pbDet = nullptr) ;
+      EGK_EXPORT bool GetParamAtPointMinDist( double& dParam, bool* pbDet = nullptr) ;
+
+   private :
+      DistPointCrvBezier( void) ;
+
+   private :
+      bool    m_bDet ;
+      double  m_dDist ;
+      double  m_dParam ;
+      Point3d m_ptMinDist ;
+} ;
+
diff --git a/DistPointCurve.cpp b/DistPointCurve.cpp
new file mode 100644
index 0000000..3af2fe6
--- /dev/null
+++ b/DistPointCurve.cpp
@@ -0,0 +1,138 @@
+//----------------------------------------------------------------------------
+//  EgalTech 2013-2013
+//----------------------------------------------------------------------------
+// File : DistPointCurve.cpp     Data : 02.01.14          Versione : 1.5a1
+// Contenuto : Implementazione della classe distanza punto da Curva.
+//
+//
+//
+// Modifiche : 02.01.14 DS Creazione modulo.
+//
+//
+//----------------------------------------------------------------------------
+
+//--------------------------- Include ----------------------------------------
+#include "stdafx.h"
+#include "DistPointLine.h"
+#include "DistPointArc.h"
+#include "DistPointCrvBezier.h"
+#include "/EgtDev/Include/EGkDistPointCurve.h"
+
+
+//----------------------------------------------------------------------------
+DistPointCurve::DistPointCurve( const Point3d& ptP, const ICurve& Curve)
+{
+  // distanza non calcolata
+   m_dDist = - 1 ;
+
+  // curva non valida
+   if ( ! Curve.IsValid())
+      return ;
+
+  // chiamo calcolatore opportuno
+   switch ( Curve.GetType()) {
+   case CRV_LINE :
+      LineCalculate( ptP, Curve) ;
+      break ;
+   case CRV_ARC :
+      ArcCalculate( ptP, Curve) ;
+      break ;
+   case CRV_BEZ :
+      CrvBezierCalculate( ptP, Curve) ;
+      break ;
+   case CRV_COMPO :
+      CrvCompositeCalculate( ptP, Curve) ;
+      break ;
+   }
+}
+
+//----------------------------------------------------------------------------
+void
+DistPointCurve::LineCalculate( const Point3d& ptP, const ICurve& Curve)
+{
+   DistPointLine dstPtLn( ptP, *GetCurveLine( &Curve)) ;
+
+   m_bDet = true ;
+   m_dDist = (( dstPtLn.m_dSqDist > 0) ? sqrt( dstPtLn.m_dSqDist) : dstPtLn.m_dSqDist) ;
+   m_dParam = dstPtLn.m_dParam ;
+   m_ptMinDist = dstPtLn.m_ptMinDist ;
+}
+
+//----------------------------------------------------------------------------
+void
+DistPointCurve::ArcCalculate( const Point3d& ptP, const ICurve& Curve)
+{
+   DistPointArc dstPtArc( ptP, *GetCurveArc( &Curve)) ;
+
+   m_bDet = dstPtArc.m_bDet ;
+   m_dDist = dstPtArc.m_dDist ;
+   m_dParam = dstPtArc.m_dParam ;
+   m_ptMinDist = dstPtArc.m_ptMinDist ;
+}
+
+//----------------------------------------------------------------------------
+void
+DistPointCurve::CrvBezierCalculate( const Point3d& ptP, const ICurve& Curve)
+{
+   DistPointCrvBezier dstPtCBez( ptP, *GetCurveBezier( &Curve)) ;
+
+   m_bDet = dstPtCBez.m_bDet ;
+   m_dDist = dstPtCBez.m_dDist ;
+   m_dParam = dstPtCBez.m_dParam ;
+   m_ptMinDist = dstPtCBez.m_ptMinDist ;
+}
+
+//----------------------------------------------------------------------------
+void
+DistPointCurve::CrvCompositeCalculate( const Point3d& ptP, const ICurve& Curve)
+{
+   //DistPointCrvComposite dstPtLn( ptP, *GetCurveComposite( &Curve)) ;
+}
+
+//----------------------------------------------------------------------------
+bool
+DistPointCurve::GetSqDist( double& dSqDist)
+{
+   if ( m_dDist < 0)
+      return false ;
+
+   dSqDist = m_dDist * m_dDist ;
+   return true ;
+}
+
+//----------------------------------------------------------------------------
+bool
+DistPointCurve::GetDist( double& dDist)
+{
+   if ( m_dDist < 0)
+      return false ;
+
+   dDist = m_dDist ;
+   return true ;
+}
+
+//----------------------------------------------------------------------------
+bool
+DistPointCurve::GetPointMinDist( Point3d& ptMinDist, bool* pbDet)
+{
+   if ( m_dDist < 0)
+      return false ;
+
+   ptMinDist = m_ptMinDist ;
+   if ( pbDet != nullptr)
+      *pbDet = m_bDet ;
+   return true ;
+}
+
+//----------------------------------------------------------------------------
+bool
+DistPointCurve::GetParamAtPointMinDist( double& dParam, bool* pbDet)
+{
+   if ( m_dDist < 0)
+      return false ;
+
+   dParam = m_dParam ;
+   if ( pbDet != nullptr)
+      *pbDet = m_bDet ;
+   return true ;
+}
diff --git a/DistPointLine.cpp b/DistPointLine.cpp
index 5b8d339..1687385 100644
--- a/DistPointLine.cpp
+++ b/DistPointLine.cpp
@@ -13,17 +13,18 @@
 
 //--------------------------- Include ----------------------------------------
 #include "stdafx.h"
-#include "\EgtDev\Include\EGkDistPointLine.h"
+#include "DistPointLine.h"
 
 
 //----------------------------------------------------------------------------
 DistPointLine::DistPointLine( const Point3d& ptP,
                               const ICurveLine& crvLine, bool bIsSegment)
 {
-   if ( ! crvLine.IsValid()) {
-      m_dSqDist = -1 ;
+  // distanza non calcolata
+   m_dDist = - 1 ;
+
+   if ( ! crvLine.IsValid())
       return ;
-   }
 
    double dLen ;
    Vector3d vtDir ;
diff --git a/DistPointLine.h b/DistPointLine.h
new file mode 100644
index 0000000..fdf86e6
--- /dev/null
+++ b/DistPointLine.h
@@ -0,0 +1,59 @@
+//----------------------------------------------------------------------------
+//  EgalTech 2013-2014
+//----------------------------------------------------------------------------
+// File : DistPointLine.h      Data : 02.01.14          Versione : 1.5a1
+// Contenuto : Dichiarazione dell'oggetto distanza punto da linea/segmento.
+//
+//
+//
+// Modifiche : 30.12.12 DS Creazione modulo.
+//
+//
+//----------------------------------------------------------------------------
+
+#pragma once
+
+#include "/EgtDev/Include/EGkPoint3d.h"
+#include "/EgtDev/Include/EGkCurveLine.h"
+
+//----------------------- Macro per import/export ----------------------------
+#undef EGK_EXPORT
+#if defined( I_AM_EGK)            // da definirsi solo nella DLL
+   #define EGK_EXPORT __declspec( dllexport)
+#else
+   #define EGK_EXPORT __declspec( dllimport)
+#endif
+
+
+//-----------------------------------------------------------------------------
+class DistPointLine
+{
+   friend class DistPointCurve ;
+
+   public :
+      EGK_EXPORT DistPointLine( const Point3d& ptP,
+                                const ICurveLine& crvLine, bool bIsSegment = true) ;
+      EGK_EXPORT DistPointLine( const Point3d& ptP,
+                                const Point3d& ptIni, const Point3d& ptFin, bool bIsSegment = true) ;
+      EGK_EXPORT DistPointLine( const Point3d& ptP,
+                                const Point3d& ptIni, const Vector3d& vtDir, double dLen, bool bIsSegment = true)
+                    { Calculate( ptP, ptIni, vtDir, dLen, bIsSegment) ; }
+
+   public :
+      EGK_EXPORT bool GetSqDist( double& dSqDist) ;
+      EGK_EXPORT bool GetDist( double& dDist) ;
+      EGK_EXPORT bool GetPointMinDist( Point3d& ptMinDist) ;
+      EGK_EXPORT bool GetParamAtPointMinDist( double& dParam) ;
+
+   private :
+      DistPointLine( void) ;
+      void Calculate( const Point3d& ptP,
+                      const Point3d& ptIni, const Vector3d& vtDir, double dLen, bool bIsSegment) ;
+
+   private :
+      double  m_dSqDist ;
+      double  m_dDist ;
+      double  m_dParam ;
+      Point3d m_ptMinDist ;
+} ;
+
diff --git a/EGkDllMain.cpp b/EGkDllMain.cpp
index e7919df..18ff73b 100644
--- a/EGkDllMain.cpp
+++ b/EGkDllMain.cpp
@@ -13,9 +13,9 @@
 
 //--------------------------- Include ----------------------------------------
 #include "stdafx.h"
-#include <\EgtDev\Include\EGkDllMain.h>
-#include <\EgtDev\Include\EgnGetModuleVer.h>
-#include <\EgtDev\Include\EgtTrace.h>
+#include "\EgtDev\Include\EGkDllMain.h"
+#include "\EgtDev\Include\EgnGetModuleVer.h"
+#include "\EgtDev\Include\EgtTrace.h"
 
 //--------------------------- Costanti ----------------------------------------
 #if defined( _DEBUG)
diff --git a/EgtGeomKernel.rc b/EgtGeomKernel.rc
index d398724..da8bb59 100644
Binary files a/EgtGeomKernel.rc and b/EgtGeomKernel.rc differ
diff --git a/EgtGeomKernel.vcxproj b/EgtGeomKernel.vcxproj
index 5adadb3..e7a722b 100644
--- a/EgtGeomKernel.vcxproj
+++ b/EgtGeomKernel.vcxproj
@@ -119,6 +119,8 @@ copy $(TargetPath) \EgtProg\Dll</Command>
   </ItemDefinitionGroup>
   <ItemGroup>
     <ClCompile Include="DistPointArc.cpp" />
+    <ClCompile Include="DistPointCrvBezier.cpp" />
+    <ClCompile Include="DistPointCurve.cpp" />
     <ClCompile Include="DistPointLine.cpp" />
     <ClCompile Include="GdbExecutor.cpp" />
     <ClCompile Include="CurveArc.cpp" />
@@ -153,8 +155,7 @@ copy $(TargetPath) \EgtProg\Dll</Command>
     <ClInclude Include="..\Include\EgkCurveComposite.h" />
     <ClInclude Include="..\Include\EgkCurveLine.h" />
     <ClInclude Include="..\Include\EGkCurvePointDiffGeom.h" />
-    <ClInclude Include="..\Include\EGkDistPointArc.h" />
-    <ClInclude Include="..\Include\EGkDistPointLine.h" />
+    <ClInclude Include="..\Include\EGkDistPointCurve.h" />
     <ClInclude Include="..\Include\EGkDllMain.h" />
     <ClInclude Include="..\Include\EGkFrame3d.h" />
     <ClInclude Include="..\Include\EGkGdbConst.h" />
@@ -172,8 +173,13 @@ copy $(TargetPath) \EgtProg\Dll</Command>
     <ClInclude Include="..\Include\EGkVector3d.h" />
     <ClInclude Include="..\Include\EgnGetModuleVer.h" />
     <ClInclude Include="..\Include\EGnStringUtils.h" />
+    <ClInclude Include="..\Include\EgtILogger.h" />
+    <ClInclude Include="..\Include\EgtLogger.h" />
     <ClInclude Include="..\Include\EgtPointerOwner.h" />
     <ClInclude Include="..\Include\EgtTrace.h" />
+    <ClInclude Include="DistPointArc.h" />
+    <ClInclude Include="DistPointCrvBezier.h" />
+    <ClInclude Include="DistPointLine.h" />
     <ClInclude Include="DllMain.h" />
     <ClInclude Include="GdbExecutor.h" />
     <ClInclude Include="CurveArc.h" />
diff --git a/EgtGeomKernel.vcxproj.filters b/EgtGeomKernel.vcxproj.filters
index 0225203..ccf4fb4 100644
--- a/EgtGeomKernel.vcxproj.filters
+++ b/EgtGeomKernel.vcxproj.filters
@@ -28,6 +28,9 @@
     <Filter Include="File di origine\Script">
       <UniqueIdentifier>{a3fbb199-9e77-4b66-8f18-7d48b8d6a8e1}</UniqueIdentifier>
     </Filter>
+    <Filter Include="File di origine\Distanze">
+      <UniqueIdentifier>{cc84f71a-b149-4187-af26-736133e92672}</UniqueIdentifier>
+    </Filter>
   </ItemGroup>
   <ItemGroup>
     <ClCompile Include="Vector3d.cpp">
@@ -93,14 +96,20 @@
     <ClCompile Include="GdbIterator.cpp">
       <Filter>File di origine\Gdb</Filter>
     </ClCompile>
-    <ClCompile Include="DistPointLine.cpp">
-      <Filter>File di origine\Base</Filter>
-    </ClCompile>
     <ClCompile Include="PolyLine.cpp">
       <Filter>File di origine\Base</Filter>
     </ClCompile>
     <ClCompile Include="DistPointArc.cpp">
-      <Filter>File di origine\Base</Filter>
+      <Filter>File di origine\Distanze</Filter>
+    </ClCompile>
+    <ClCompile Include="DistPointLine.cpp">
+      <Filter>File di origine\Distanze</Filter>
+    </ClCompile>
+    <ClCompile Include="DistPointCurve.cpp">
+      <Filter>File di origine\Distanze</Filter>
+    </ClCompile>
+    <ClCompile Include="DistPointCrvBezier.cpp">
+      <Filter>File di origine\Distanze</Filter>
     </ClCompile>
   </ItemGroup>
   <ItemGroup>
@@ -227,9 +236,6 @@
     <ClInclude Include="..\Include\EGkDllMain.h">
       <Filter>File di intestazione</Filter>
     </ClInclude>
-    <ClInclude Include="..\Include\EGkDistPointLine.h">
-      <Filter>File di intestazione</Filter>
-    </ClInclude>
     <ClInclude Include="DllMain.h">
       <Filter>File di intestazione</Filter>
     </ClInclude>
@@ -242,7 +248,22 @@
     <ClInclude Include="..\Include\EGkGeoCollection.h">
       <Filter>File di intestazione</Filter>
     </ClInclude>
-    <ClInclude Include="..\Include\EGkDistPointArc.h">
+    <ClInclude Include="DistPointArc.h">
+      <Filter>File di intestazione</Filter>
+    </ClInclude>
+    <ClInclude Include="DistPointLine.h">
+      <Filter>File di intestazione</Filter>
+    </ClInclude>
+    <ClInclude Include="..\Include\EGkDistPointCurve.h">
+      <Filter>File di intestazione</Filter>
+    </ClInclude>
+    <ClInclude Include="DistPointCrvBezier.h">
+      <Filter>File di intestazione</Filter>
+    </ClInclude>
+    <ClInclude Include="..\Include\EgtILogger.h">
+      <Filter>File di intestazione</Filter>
+    </ClInclude>
+    <ClInclude Include="..\Include\EgtLogger.h">
       <Filter>File di intestazione</Filter>
     </ClInclude>
   </ItemGroup>
diff --git a/GdbExecutor.cpp b/GdbExecutor.cpp
index 7a56eff..e7f2ae0 100644
--- a/GdbExecutor.cpp
+++ b/GdbExecutor.cpp
@@ -25,13 +25,13 @@
 #include "/EgtDev/Include/EgkCurveArc.h"
 #include "/EgtDev/Include/EgkCurveBezier.h"
 #include "/EgtDev/Include/EgkCurveComposite.h"
-#include "/EgtDev/Include/EgkDistPointLine.h"
-#include "/EgtDev/Include/EgkDistPointArc.h"
+#include "/EgtDev/Include/EgkDistPointCurve.h"
 #include "/EgtDev/Include/EgtPointerOwner.h"
 
 using namespace std ;
 
 //----------------------------------------------------------------------------
+static const int ID_NO = -2 ;
 static const int ID_ERROR = -3 ;
 
 //----------------------------------------------------------------------------
@@ -45,6 +45,9 @@ CreateGdbExecutor( void)
 GdbExecutor::GdbExecutor( void)
 {
    m_pGDB = nullptr ;
+  // alias predefiniti
+   m_NameMap.insert( pair< string, int>( "$ROOT", GDB_ID_ROOT)) ;
+   m_NameMap.insert( pair< string, int>( "$NN", ID_NO)) ;
 }
 
 //----------------------------------------------------------------------------
@@ -77,12 +80,10 @@ GdbExecutor::Execute( const string& sCmd1, const string& sCmd2, const STRVECTOR&
       sOut += *theConstIter ;
    }
    sOut += "]" ;
-   LOG_DBG_INFO( GetEGkLogger(), sOut.c_str()) ;
+   LOG_DBG_INFO( GetEGkLogger(), sOut.c_str())
 
   // esecuzione comando
-   if ( sCmd1 == "ALIAS")
-      return ExecuteAlias( sCmd2, vsParams) ;
-   else if ( sCmd1 == "GR"  ||  sCmd1 == "GROUP")
+   if ( sCmd1 == "GR"  ||  sCmd1 == "GROUP")
       return ExecuteGroup( sCmd2, vsParams) ;
    else if ( sCmd1 == "P"  ||  sCmd1 == "POINT")
       return ExecutePoint( sCmd2, vsParams) ;
@@ -124,26 +125,6 @@ GdbExecutor::Execute( const string& sCmd1, const string& sCmd2, const STRVECTOR&
    return false ;
 }
 
-//----------------------------------------------------------------------------
-bool
-GdbExecutor::ExecuteAlias( const string& sCmd2, const STRVECTOR& vsParams) 
-{
-  // analisi ed esecuzione dei comandi
-   if ( sCmd2 == "") {
-      int nId ;
-     // 2 parametri : stringa alias e Id
-      if ( vsParams.size() != 2)
-         return false ;
-     // recupero Id
-      if ( ! FromString( vsParams[1], nId))
-         return false ;
-     // inserisco le stringhe in coda alla lista
-      return m_AliasMap.insert( pair< string, int>( vsParams[0], nId)).second ;
-   }
-
-   return false ;
-}
-
 //----------------------------------------------------------------------------
 bool
 GdbExecutor::ExecuteGroup( const string& sCmd2, const STRVECTOR& vsParams) 
@@ -187,11 +168,11 @@ GdbExecutor::ExecuteGroup( const string& sCmd2, const STRVECTOR& vsParams)
       return false ;
 
   // creo il gruppo
-   int nIdDest = GetIdParam( vsParams[0]) ;
+   int nIdDest = GetIdParam( vsParams[0], true) ;
    int nIdNew = m_pGDB->AddGroup( nIdDest, GetIdParam( vsParams[1]), frFrame) ;
   // se IdDest da calcolare e indicato da Alias, ne cambio il valore
-   if ( nIdDest == GDB_ID_NULL  &&  m_AliasMap.find( vsParams[0]) != m_AliasMap.end())
-      m_AliasMap[vsParams[0]] = nIdNew ;
+   if ( nIdDest == GDB_ID_NULL  &&  m_NameMap.find( vsParams[0]) != m_NameMap.end())
+      m_NameMap[vsParams[0]] = nIdNew ;
 
    return ( nIdNew != GDB_ID_NULL) ;
 }
@@ -338,25 +319,9 @@ GdbExecutor::ExecuteCurveLine( const string& sCmd2, const STRVECTOR& vsParams)
       ptSloc.LocToLoc( frPoint, frCurve) ;
      // calcolo il punto a minima distanza
       Point3d ptEnd ;
-      switch ( pCurve->GetType()) {
-      case CRV_LINE :
-         {  DistPointLine dstPtLn( ptSloc, *GetCurveLine( pCurve)) ;
-            if ( ! dstPtLn.GetPointMinDist( ptEnd))
-               return false ;
-         }  break ;
-      case CRV_ARC :
-         {  DistPointArc dstPtArc( ptSloc, *GetCurveArc( pCurve)) ;
-            if ( ! dstPtArc.GetPointMinDist( ptEnd))
-               return false ;
-         }  break ;
-      //case CRV_BEZ :
-      //   return PutCurveBez( *GetCurveBezier( pCurve), nFlag) ;
-      //case CRV_COMPO :
-      //   return PutCurveCompo( *GetCurveComposite( pCurve), nFlag) ;
-      default :
+      DistPointCurve dstPtCurve( ptSloc, *pCurve) ;
+      if ( ! dstPtCurve.GetPointMinDist( ptEnd))
          return false ;
-         break ;
-      }
      // porto il punto finale nel riferimento di creazione
       ptEnd.LocToLoc( frCurve, frPoint) ;
      // setto la linea
@@ -623,28 +588,38 @@ bool
 GdbExecutor::AddGeoObj( const string& sId, const string& sIdParent, IGeoObj* pGeoObj)
 {
   // creo il gruppo
-   int nId = GetIdParam( sId) ;
+   int nId = GetIdParam( sId, true) ;
    int nIdNew = m_pGDB->AddGeoObj( nId, GetIdParam( sIdParent), pGeoObj) ;
   // se IdDest da calcolare e indicato da Alias, ne cambio il valore
-   if ( nId == GDB_ID_NULL  &&  m_AliasMap.find( sId) != m_AliasMap.end())
-      m_AliasMap[sId] = nIdNew ;
+   if ( nId == GDB_ID_NULL  &&  m_NameMap.find( sId) != m_NameMap.end())
+      m_NameMap[sId] = nIdNew ;
 
    return ( nIdNew != GDB_ID_NULL) ;
 }
 
 //----------------------------------------------------------------------------
 int
-GdbExecutor::GetIdParam( const std::string& sParam)
+GdbExecutor::GetIdParam( const std::string& sParam, bool bNewAllowed)
 {
    int     nVal ;
-   AliasMap::iterator Iter ;   
+   NameMap::iterator Iter ;   
 
 
-  // sostituisco eventuali Alias
-   Iter = m_AliasMap.find( sParam) ;
-   if ( Iter != m_AliasMap.end())
-      return Iter->second ;
-  // converto in identificatore numerico
+  // se nome di identificatore numerico
+   if ( sParam[0] == '$') {
+     // se già presente nella lista dei nomi, ne restituisco il valore
+      Iter = m_NameMap.find( sParam) ;
+      if ( Iter != m_NameMap.end())
+         return Iter->second ;
+     // se ammessa nuova definizione, provo ad inserirlo
+      else if ( bNewAllowed  &&
+                m_NameMap.insert( pair< string, int>( sParam, GDB_ID_NULL)).second)
+         return GDB_ID_NULL ;
+     // altrimenti errore
+      else
+         return ID_ERROR ;
+   }
+  // se identificatore numerico
    else if ( FromString( sParam, nVal))
       return nVal ;
   // altrimenti errore
@@ -772,11 +747,11 @@ GdbExecutor::ExecuteCopy( const STRVECTOR& vsParams)
    if ( vsParams.size() != 3)
       return false ;
   // esecuzione copia
-   int nIdDest = GetIdParam( vsParams[1]) ;
+   int nIdDest = GetIdParam( vsParams[1], true) ;
    int nIdNew = m_pGDB->Copy( GetIdParam( vsParams[0]), nIdDest, GetIdParam( vsParams[2])) ;
   // se IdDest da calcolare e indicato da Alias, ne cambio il valore
-   if ( nIdDest == GDB_ID_NULL  &&  m_AliasMap.find( vsParams[1]) != m_AliasMap.end())
-      m_AliasMap[vsParams[1]] = nIdNew ;
+   if ( nIdDest == GDB_ID_NULL  &&  m_NameMap.find( vsParams[1]) != m_NameMap.end())
+      m_NameMap[vsParams[1]] = nIdNew ;
 
    return ( nIdNew != GDB_ID_NULL) ;
 }
diff --git a/GdbExecutor.h b/GdbExecutor.h
index 26a8df4..05a0407 100644
--- a/GdbExecutor.h
+++ b/GdbExecutor.h
@@ -30,12 +30,11 @@ class GdbExecutor : public IGdbExecutor
 
    private :
       bool AddGeoObj( const std::string& sId, const std::string& sIdParent, IGeoObj* pGeoObj) ;
-      int  GetIdParam( const std::string& sParam) ;
+      int  GetIdParam( const std::string& sParam, bool bNewAllowed = false) ;
       bool GetNamesParam( const std::string& sParam, STRVECTOR& vsNames) ;
       bool GetVectorParam( const std::string& sParam, Vector3d& vtV) ;
       bool GetPointParam( const std::string& sParam, Point3d& ptP) ;
       bool GetPointWParam( const std::string& sParam, Point3d& ptP, double& dW) ;
-      bool ExecuteAlias( const std::string& sCmd2, const STRVECTOR& vsParams) ;
       bool ExecuteGroup( const std::string& sCmd2, const STRVECTOR& vsParams) ;
       bool ExecutePoint( const std::string& sCmd2, const STRVECTOR& vsParams) ;
       bool ExecuteVector( const std::string& sCmd2, const STRVECTOR& vsParams) ;
@@ -60,6 +59,6 @@ class GdbExecutor : public IGdbExecutor
    private :
       IGeomDB*  m_pGDB ;
       OutScl    m_OutScl ;
-      typedef std::unordered_map<std::string, int> AliasMap ;
-      AliasMap m_AliasMap ;
+      typedef std::unordered_map<std::string, int> NameMap ;
+      NameMap m_NameMap ;
 } ;
diff --git a/GeomDB.cpp b/GeomDB.cpp
index 870c736..100f54c 100644
--- a/GeomDB.cpp
+++ b/GeomDB.cpp
@@ -79,14 +79,14 @@ GeomDB::Load( const std::string& sFileIn)
 
   // inizializzo lo scanner
    if ( ! TheScanner.Init( sFileIn)) {
-      LOG_ERROR( GetEGkLogger(), "GeomDbLoad : Error on Init ") ;
+      LOG_ERROR( GetEGkLogger(), "GeomDbLoad : Error on Init ")
       return false ;
    }
 
   // leggo l'intestazione
    if ( ! LoadStart( TheScanner)) {
       string sOut = "GeomDbLoad : Error on line " + ToString( TheScanner.GetCurrLineNbr()) ;
-      LOG_ERROR( GetEGkLogger(), sOut.c_str()) ;
+      LOG_ERROR( GetEGkLogger(), sOut.c_str())
       return false ;
    }
 
@@ -96,7 +96,7 @@ GeomDB::Load( const std::string& sFileIn)
       if ( ! LoadOneNode( TheScanner, bEnd)) {
          bOk = false ;
          string sOut = "GeomDbLoad : Error on line " + ToString( TheScanner.GetCurrLineNbr()) ;
-         LOG_ERROR( GetEGkLogger(), sOut.c_str()) ;
+         LOG_ERROR( GetEGkLogger(), sOut.c_str())
       }
    } while ( ! bEnd) ;