diff --git a/EGkDllMain.cpp b/EGkDllMain.cpp
index 0ee5a33..54e5896 100644
--- a/EGkDllMain.cpp
+++ b/EGkDllMain.cpp
@@ -159,11 +159,20 @@ InitFontManager( const string& sNfeFontDir, const string& sDefaultFont)
 {
   // recupero il font manager
    FontManager& fntMgr = FontManager::GetFontManager() ;
-
   // lo inizializzo
    fntMgr.Init( sNfeFontDir, sDefaultFont) ;
 }
 
+//-----------------------------------------------------------------------------
+void
+SetDefaultFont( const string& sDefaultFont)
+{
+  // recupero il font manager
+   FontManager& fntMgr = FontManager::GetFontManager() ;
+  // imposto il dato
+   fntMgr.SetDefaultFont( sDefaultFont) ;
+}
+
 //-----------------------------------------------------------------------------
 const string&
 GetNfeFontDir( void)
diff --git a/EgtGeomKernel.rc b/EgtGeomKernel.rc
index 65a1dfb..4b21411 100644
Binary files a/EgtGeomKernel.rc and b/EgtGeomKernel.rc differ
diff --git a/FontManager.h b/FontManager.h
index 1b4eb3a..27b9ccc 100644
--- a/FontManager.h
+++ b/FontManager.h
@@ -29,6 +29,8 @@ class FontManager
 
    public :
       bool Init( const std::string& sNfeFontDir, const std::string& sDefaultFont) ;
+      bool SetDefaultFont( const std::string& sDefaultFont)
+               { m_sDefaultFont = sDefaultFont ; return true ; }
       bool SetCurrFont( const std::string& sFont, int nWeight, bool bItalic,
                         double dHeight, double dRatio, double dAddAdvance) ;
       const std::string& GetNfeFontDir( void) const
@@ -54,7 +56,7 @@ class FontManager
       OsFont      m_OsFont ;
 
    private :
-      FontManager( void) {}
+      FontManager( void) : m_bCurrNfeFont( false)  {}
       FontManager( FontManager const& copy) = delete ;
       FontManager& operator=( FontManager const& copy) = delete ;
 } ;
diff --git a/SurfTriMesh.cpp b/SurfTriMesh.cpp
index 725eb83..1ca8a0d 100644
--- a/SurfTriMesh.cpp
+++ b/SurfTriMesh.cpp
@@ -3637,6 +3637,18 @@ SurfTriMesh::Invert( void)
    for ( int i = 0 ; i < GetTriangleSize() ; ++ i)
       InvertTriangle( i) ;
 
+  // se bordi della sfaccettatura validi
+   if ( m_bFacEdged) {
+      for ( int nE = 0 ; nE < GetEdgeCount() ; ++ nE) {
+        // inversione dei vertici nel vettore delle sfaccettature
+         swap( m_vFacEdge[nE].nIdVert[0], m_vFacEdge[nE].nIdVert[1]) ;
+        // inversione delle adiacenze nel vettore delle sfaccettature
+         swap( m_vFacEdge[nE].nIdFacAdj[0], m_vFacEdge[nE].nIdFacAdj[1]) ;
+        // inversione dell'angolo interno
+         m_vFacEdge[nE].dIntAng *= -1. ;
+      }
+   }
+
    return true ;
 }