diff --git a/EGkDistPointSurfBz.h b/EGkDistPointSurfBz.h
index 89e3013..24c8ad6 100644
--- a/EGkDistPointSurfBz.h
+++ b/EGkDistPointSurfBz.h
@@ -47,7 +47,7 @@ class DistPointSurfBz
       EGK_EXPORT bool IsZero( void) const
                        { return IsEpsilon( EPS_ZERO) ; }
       EGK_EXPORT bool GetMinDistPoint( Point3d& ptMinDistPoint) const ;
-      EGK_EXPORT bool GetParamPoint( Point3d& ptParamPoint) const ;
+      EGK_EXPORT bool GetParamsAtMinDistPoint( double& dU, double& dV) const ;
       EGK_EXPORT bool GetNorm( Vector3d& vtN) const ;
       EGK_EXPORT bool IsPointInside( void) const
                         { return ( m_bIsInside  &&  m_bIsSurfClosed) ; }
@@ -58,10 +58,10 @@ class DistPointSurfBz
       void Calculate( const Point3d& ptP, const ISurfBezier& srfBz) ;
 
    private :
-      double  m_dDist ;                   // Minima distanza del punto dalla superficie
-      Point3d m_ptMinDistPoint ;          // Punto sulla superficie a minima distanza
-      Point3d m_ptParam ;                 // punto corrispondente nello spazio parametrico
-      Vector3d m_vtN ;                    // normale alla superficie nel punto a minima distanza
-      bool    m_bIsInside ;               // Flag per punto interno o esterno alla superficie ( se chiusa )
-      bool    m_bIsSurfClosed ;           // Flag per superficie aperta o chiusa
+      double   m_dDist ;                   // Minima distanza del punto dalla superficie
+      Point3d  m_ptMinDistPoint ;          // Punto sulla superficie a minima distanza
+      Point3d  m_ptParam ;                 // punto corrispondente nello spazio parametrico (x->U, y->V)
+      Vector3d m_vtN ;                     // normale alla superficie nel punto a minima distanza
+      bool     m_bIsInside ;               // Flag per punto interno o esterno alla superficie ( se chiusa )
+      bool     m_bIsSurfClosed ;           // Flag per superficie aperta o chiusa
 } ;
diff --git a/EGkProjectCurveSurf.h b/EGkProjectCurveSurf.h
index 703b213..13fd118 100644
--- a/EGkProjectCurveSurf.h
+++ b/EGkProjectCurveSurf.h
@@ -31,13 +31,18 @@ struct Point5ax {
    Point3d  ptP ;
    Vector3d vtDir1 ;
    Vector3d vtDir2 ;
+   Vector3d vtDirU ;
+   Vector3d vtDirV ;
    double   dPar ;
    int      nFlag ;
-   Point5ax( void) : ptP(), vtDir1(), vtDir2(), dPar(), nFlag() {} ;
+   Point5ax( void) : ptP(), vtDir1(), vtDir2(), vtDirU(), vtDirV(), dPar(), nFlag() {} ;
    Point5ax( const Point3d& ptBase, const Vector3d& vtTool, double dU, int nData)
-      : ptP( ptBase), vtDir1( vtTool), vtDir2(), dPar( dU), nFlag( nData) {} ;
+      : ptP( ptBase), vtDir1( vtTool), vtDir2(), vtDirU(), vtDirV(), dPar( dU), nFlag( nData) {} ;
    Point5ax( const Point3d& ptBase, const Vector3d& vtTool, const Vector3d& vtTool2, double dU, int nData)
-      : ptP( ptBase), vtDir1( vtTool), vtDir2( vtTool2), dPar( dU), nFlag( nData) {} ;
+      : ptP( ptBase), vtDir1( vtTool), vtDir2( vtTool2), vtDirU(), vtDirV(), dPar( dU), nFlag( nData) {} ;
+   Point5ax( const Point3d& ptBase, const Vector3d& vtTool, const Vector3d& vtTool2,
+             const Vector3d& vtDU, const Vector3d& vtDV, double dU, int nData)
+      : ptP( ptBase), vtDir1( vtTool), vtDir2( vtTool2), vtDirU( vtDU), vtDirV( vtDV), dPar( dU), nFlag( nData) {} ;
 } ; 
 typedef std::vector<Point5ax>        PNT5AXVECTOR ;    // vettore di Punti 5assi