diff --git a/EGkPolygon3d.h b/EGkPolygon3d.h
index 562499e..02c9541 100644
--- a/EGkPolygon3d.h
+++ b/EGkPolygon3d.h
@@ -1,14 +1,15 @@
 //----------------------------------------------------------------------------
-//  EgalTech 2015-2019
+//  EgalTech 2015-2020
 //----------------------------------------------------------------------------
-// File : Polygon3d.h           Data : 23.07.19          Versione : 2.1g3
+// File : Polygon3d.h           Data : 02.10.20          Versione : 2.2j1
 // Contenuto : Dichiarazione della classe Polygon3d (poligono nello spazio).
 //
 //
 //
 // Modifiche : 30.08.15 DS Creazione modulo.
 //             19.06.19 DS Aggiunta GetVertices.
-//             23.07.19 Ds Aggiunte Offset e Invert.
+//             23.07.19 DS Aggiunte Offset e Invert.
+//             02.10.20 DS A FromPlaneTrimmedWithBox aggiunto parametro dToler.
 //
 //----------------------------------------------------------------------------
 
@@ -37,12 +38,27 @@ class Polygon3d
       EGK_EXPORT bool FromRectangle( double dDimX, double dDimY) ;
       EGK_EXPORT bool FromPolyLine( const PolyLine& PL) ;
       EGK_EXPORT bool FromPlaneTrimmedWithBox( const Plane3d& plPlane,
-                                               const Point3d& ptMin, const Point3d& ptMax, bool bOnEq = false, bool bOnCt = false) ;
+                                               const Point3d& ptMin, const Point3d& ptMax, bool bOnEq = false, bool bOnCt = false, double dToler = EPS_SMALL) ;
       EGK_EXPORT bool FromPlaneTrimmedWithBox( const Point3d& ptOn, const Vector3d& vtN,
-                                               const Point3d& ptMin, const Point3d& ptMax, bool bOnEq = false, bool bOnCt = false) ;
+                                               const Point3d& ptMin, const Point3d& ptMax, bool bOnEq = false, bool bOnCt = false, double dToler = EPS_SMALL) ;
       EGK_EXPORT bool Trim( const Plane3d& plPlane, bool bInVsOut, bool bOnEq = false, bool bOnCt = false) ;
       EGK_EXPORT bool Trim( const Polygon3d& plyOther, bool bInVsOut, bool bOnEq = false, bool bOnCt = false) ;
       EGK_EXPORT bool Add( const Polygon3d& plyOther) ;
+      EGK_EXPORT void Offset( double dDist)
+                         { Translate( dDist * m_Plane.GetVersN()) ; }
+      EGK_EXPORT void Invert( void) ;
+      EGK_EXPORT void Translate( const Vector3d& vtMove) ;
+      EGK_EXPORT bool Rotate( const Point3d& ptAx, const Vector3d& vtAx, double dAngDeg)
+                         { double dAngRad = dAngDeg * DEGTORAD ;
+                           return Rotate( ptAx, vtAx, cos( dAngRad), sin( dAngRad)) ; }
+      EGK_EXPORT bool Rotate( const Point3d& ptAx, const Vector3d& vtAx, double dCosAng, double dSinAng) ;
+      EGK_EXPORT bool Scale( const Frame3d& frRef, double dCoeffX, double dCoeffY, double dCoeffZ) ;
+      EGK_EXPORT bool Mirror( const Point3d& ptOn, const Vector3d& vtNorm) ;
+      EGK_EXPORT bool Shear( const Point3d& ptOn, const Vector3d& vtNorm, const Vector3d& vtDir, double dCoeff) ;
+      EGK_EXPORT bool ToGlob( const Frame3d& frRef) ;
+      EGK_EXPORT bool ToLoc( const Frame3d& frRef) ;
+      EGK_EXPORT bool LocToLoc( const Frame3d& frOri, const Frame3d& frDest) ;
+
       EGK_EXPORT bool IsValid( void) const
                             { return ! m_Plane.GetVersN().IsSmall() ; }
       EGK_EXPORT const Plane3d& GetPlane( void) const
@@ -60,22 +76,6 @@ class Polygon3d
       EGK_EXPORT double GetPerimeter( void) const ;
       EGK_EXPORT double GetArea( void) const ;
 
-   public :
-      EGK_EXPORT void Translate( const Vector3d& vtMove) ;
-      EGK_EXPORT bool Rotate( const Point3d& ptAx, const Vector3d& vtAx, double dAngDeg)
-                         { double dAngRad = dAngDeg * DEGTORAD ;
-                           return Rotate( ptAx, vtAx, cos( dAngRad), sin( dAngRad)) ; }
-      EGK_EXPORT bool Rotate( const Point3d& ptAx, const Vector3d& vtAx, double dCosAng, double dSinAng) ;
-      EGK_EXPORT bool Scale( const Frame3d& frRef, double dCoeffX, double dCoeffY, double dCoeffZ) ;
-      EGK_EXPORT bool Mirror( const Point3d& ptOn, const Vector3d& vtNorm) ;
-      EGK_EXPORT bool Shear( const Point3d& ptOn, const Vector3d& vtNorm, const Vector3d& vtDir, double dCoeff) ;
-      EGK_EXPORT bool ToGlob( const Frame3d& frRef) ;
-      EGK_EXPORT bool ToLoc( const Frame3d& frRef) ;
-      EGK_EXPORT bool LocToLoc( const Frame3d& frOri, const Frame3d& frDest) ;
-      EGK_EXPORT void Offset( double dDist)
-                         { Translate( dDist * m_Plane.GetVersN()) ; }
-      EGK_EXPORT void Invert( void) ;
-
    private :
       Plane3d   m_Plane ;                 // piano in cui giace il poligono
       PNTVECTOR m_vVert ;                 // elenco ordinato dei vertici del poligono (CCW da Z+ piano)