diff --git a/vroni/Include/vroni_object.h b/vroni/Include/vroni_object.h
index 63fe3a6..f93fb0d 100644
--- a/vroni/Include/vroni_object.h
+++ b/vroni/Include/vroni_object.h
@@ -3091,12 +3091,13 @@ public :
   // voronoi
    void ResetVoronoiDiagram(void) ;
    BisectorType GetBisectorType( int i) ;
+   vr_bool GetBisectorParams( int nEdge, double& dParS, double& dParE) ;
    vr_bool GetApproxedBisectorParams( int nEdge, double& dParS, double& dParE) ;
    int GetApproxedBisectorPointsNbr( int nEdge) ;
    vr_bool GetApproxedBisectorPoint( int nEdge, int nPointIdx, double pt[3], double& dPar) ;
    vr_bool GetDegenerateHyperEllipticBisectorData( int nEdge, double ptS[3], double ptE[3], double ptC[3], double& dParS, double& dParE) ;
    vr_bool GetLinearBisectorData( int nEdge, double ptS[3], double ptE[3], double& dParS, double& dParE) ;
-   int m_nBufferedVDEdge = -1 ;
+   vr_bool IsRelatedEdge( int nEdge, int nOrigSite, bool bLeft) ;
 
   // media axis
    vr_bool IsWMATEdge( int nEdge) ;
@@ -3105,14 +3106,17 @@ public :
    void MyWriteVoronoiDiagram() ;
 
   // gestione eccezioni
-   const char* GetExceptionMessage() ;
-   int m_nMostViolatedRecursiveArcCount = 0 ;
+   const char* GetExceptionMessage() ;   
 
   // deallocazione memoria
    void MyFreeVDConstructionData() ;
    void apiFreeOffsetData() ;
    void apiFreeBisectorBuffer() ;
 
+private :
+   int m_nMostViolatedRecursiveArcCount = 0 ;
+   int m_nBufferedVDEdge = -1 ;
+
  };
 
 
diff --git a/vroni/Lib/vroniD32.lib b/vroni/Lib/vroniD32.lib
index 4c7e3f1..3ccaad1 100644
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diff --git a/vroni/Lib/vroniD32.pdb b/vroni/Lib/vroniD32.pdb
index 3522995..ffb3989 100644
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diff --git a/vroni/Lib/vroniD64.lib b/vroni/Lib/vroniD64.lib
index 307356c..fc0238a 100644
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diff --git a/vroni/Lib/vroniR32.lib b/vroni/Lib/vroniR32.lib
index 019a8f3..8e0717a 100644
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diff --git a/vroni/Lib/vroniR64.lib b/vroni/Lib/vroniR64.lib
index 30bbe91..6ef8c81 100644
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