diff --git a/EGkSurfBezier.h b/EGkSurfBezier.h
index a164d63..0ef4418 100644
--- a/EGkSurfBezier.h
+++ b/EGkSurfBezier.h
@@ -14,6 +14,7 @@
 #pragma once
 
 #include "/EgtDev/Include/EGkSurf.h"
+#include "/EgtDev/Include/EGkCurveComposite.h"
 #include "/EgtDev/Include/EgtPointerOwner.h"
 
 class PolyLine ;
@@ -61,12 +62,13 @@ class __declspec( novtable) ISurfBezier : public ISurf
       virtual bool GetLeaves ( std::vector<std::tuple<int, Point3d, Point3d>>& vLeaves) const = 0 ;
       virtual bool GetTriangles2D( std::vector<std::tuple<int,Point3d, Point3d, Point3d>>& vTria2D) const = 0 ;
       virtual bool UnprojectPointFromStm( int nT, const Point3d& ptI, Point3d& ptSP, int nIL) const = 0 ;
-      virtual bool UnprojectPointFromStm( int nT, const Point3d& ptI, Point3d& ptSP, int nIL, const Point3d& ptIPrevint, int nTPrev = -1 ) const = 0 ;
-      virtual bool UnprojectPoint( const Point3d& pt3D, Point3d& ptParam) const = 0 ;
-      virtual ICurveComposite* UnprojectCurveFromStm( const ICurveComposite* pCC) const = 0 ;
+      virtual bool UnprojectPointFromStm( int nT, const Point3d& ptI, Point3d& ptSP, int nIL, const Point3d& ptIPrev, bool* bTroughEdge = nullptr) const = 0 ;
+      virtual bool UnprojectPoint( const Point3d& pt3D, Point3d& ptParam, const Point3d& ptIPrev, bool* bTroughEdge = nullptr) const = 0 ;
+      virtual bool UnprojectCurveFromStm( const ICurveComposite* pCC, ICRVCOMPOPVECTOR& vpCC) const = 0 ;
       virtual bool Cut( const Plane3d& plPlane, bool bSaveOnEq) = 0 ;  // taglio la parte della superficie dalla parte positiva del versore del piano.
                                                                        // Il booleano indica se tenere eventuali triangoli della trimesh ausiliaria che sono coplanari ed equiversi al piano di taglio
       virtual bool CalcPoles( void) ;  // funzione da chiamare per calcolare i poli della superficie. NECESSARIO se si vuole tagliare la superficie con un piano
+      virtual bool IncreaseUV( double& dU, double dx, bool bUOrV) const = 0 ;
 } ;
 
 //-----------------------------------------------------------------------------