diff --git a/EGkCurveAux.h b/EGkCurveAux.h
index d8490a8..4b2398a 100644
--- a/EGkCurveAux.h
+++ b/EGkCurveAux.h
@@ -176,4 +176,8 @@ EGK_EXPORT bool GetChainedCurves( ICRVCOMPOPOVECTOR& vCrv, double dChainTol = 5
 //----------------------------------------------------------------------------
 //! dato un punto su una curva trova il corrispondente sulla seconda curva
 EGK_EXPORT bool GetIsoPointOnSecondCurve( const ICurve* pCrv1, const ICurve* pCrv2, double dUCurr1, double& dUCurr2, double dMyDist, double dUPrev2,
-                                          double dLenPrev2, double& dLenCurr2, double dLen2) ;
\ No newline at end of file
+                                          double dLenPrev2, double& dLenCurr2, double dLen2) ;
+
+//----------------------------------------------------------------------------
+//! esegue il taglio di una curva con un piano
+EGK_EXPORT bool CutCurveWithPlane( const ICurve* pCrv, const Plane3d& Plane, bool bSaveOn, ICURVEPOVECTOR& vCrvRes) ;
diff --git a/EMkMachiningGeoConst.h b/EMkMachiningGeoConst.h
index efefd9b..c473081 100644
--- a/EMkMachiningGeoConst.h
+++ b/EMkMachiningGeoConst.h
@@ -124,7 +124,9 @@ static std::string KEY_PREVIEWSHOW = "PreviewShow" ;
 // Chiavi info in entità di CL e DBL per riferimenti reciproci
 static std::string KEY_DBL_MAIN = "Main" ;
 static std::string KEY_CL_DOUBLE = "Double" ;
-
+// Chiavi info per versore utensile e versore movimento
+static std::string KEY_TOOL_DIR = "TDIR" ;
+static std::string KEY_TOOL_MOVE = "TMOVE" ;
 //----------------- Costanti posizione per preview utensile in lavorazione ------
 enum MchToolShow { MCH_TPM_CURR = 0,
                    MCH_TPM_BEFORE = -1,