diff --git a/CalcPocketing.cpp b/CalcPocketing.cpp
index 2c2fd39..c6dc49e 100644
--- a/CalcPocketing.cpp
+++ b/CalcPocketing.cpp
@@ -85,11 +85,43 @@ typedef vector<ICRVCOMPOPOVECTOR> VICRVCOMPOPOVECTOR ;
    #include "EgtDev/Include/EGkGeoObjSave.h"
    #include "EgtDev/Include/EGkGeoPoint3d.h"
    #include "EgtDev/Include/EGkGeoVector3d.h"
+
+  // Varibili ausiliarie
    vector<IGeoObj*> VT ;
    vector<Color> VC ;
+
+  //---------------------------------------------------------------------------
    inline Color GetRandomColor() {
       return Color( double( rand()) / RAND_MAX, double( rand()) / RAND_MAX, double( rand()) / RAND_MAX, 1.) ;
    }
+
+  //---------------------------------------------------------------------------
+   inline void DrawCurve( const ICurveComposite* pCrvCompo) {
+      if ( pCrvCompo == nullptr  ||  ! pCrvCompo->IsValid())
+         return ;
+      for ( int nU = 0 ; nU < pCrvCompo->GetCurveCount() ; ++ nU) {
+         int nProp0 ; pCrvCompo->GetCurveTempProp( nU, nProp0, 0) ;
+         VT.emplace_back( static_cast<IGeoObj*>( pCrvCompo->GetCurve( nU)->Clone())) ;
+         VC.emplace_back( nProp0 == 0 ? BLUE : RED) ;
+      }
+      return ;
+   }
+
+  //---------------------------------------------------------------------------
+   inline void DrawSfrAndLoops( const ISurfFlatRegion* pSfr, Color cCol = Color( 0., 255., 0., .5)) {
+      if ( pSfr == nullptr  ||  ! pSfr->IsValid())
+         return ;
+      VT.emplace_back( static_cast<IGeoObj*>( pSfr->Clone())) ;
+      VC.emplace_back( cCol) ;
+      for ( int nC = 0 ; nC < pSfr->GetChunkCount() ; ++ nC) {
+         for ( int nL = 0 ; nL < pSfr->GetLoopCount( nC) ; ++ nL) {
+            PtrOwner<ICurveComposite> pCrvCompo( ConvertCurveToComposite( pSfr->GetLoop( nC, nL))) ;
+            DrawCurve( pCrvCompo->Clone()) ;
+         }
+      }
+      return ;
+   }
+
 #endif
 
 //---------------------------------------------------------------------------
diff --git a/SurfTriMesh.cpp b/SurfTriMesh.cpp
index 87e5ffb..21c4386 100644
--- a/SurfTriMesh.cpp
+++ b/SurfTriMesh.cpp
@@ -1220,16 +1220,17 @@ SurfTriMesh::GetSilhouette( const Plane3d& plPlane, double dTol, POLYLINEVECTOR&
         // se rimasto qualcosa
          if ( pgTria.GetSideCount() > 0) {
            // lo proietto sul piano e creo la regione
-            pgTria.Scale( frOCS, 1, 1, 0) ;
-            PtrOwner<SurfFlatRegion> pSfrTria( GetBasicSurfFlatRegion( GetSurfFlatRegionFromPolyLine( pgTria.GetPolyLine()))) ;
-            if ( ! IsNull( pSfrTria)) {
-               if ( bAllTria  &&  Tria.GetN() * vtVers < 0)
-                  pSfrTria->Invert() ;
-               pSfrTria->Offset( dTol, ICurve::OFF_FILLET) ;
-               if ( IsNull( pSfr))
-                  pSfr.Set( pSfrTria) ;
-               else
-                  pSfr->Add( *pSfrTria) ;
+            if ( pgTria.Scale( frOCS, 1, 1, 0)) {
+               PtrOwner<SurfFlatRegion> pSfrTria( GetBasicSurfFlatRegion( GetSurfFlatRegionFromPolyLine( pgTria.GetPolyLine()))) ;
+               if ( ! IsNull( pSfrTria)) {
+                  if ( bAllTria  &&  Tria.GetN() * vtVers < 0)
+                     pSfrTria->Invert() ;
+                  pSfrTria->Offset( dTol, ICurve::OFF_FILLET) ;
+                  if ( IsNull( pSfr))
+                     pSfr.Set( pSfrTria) ;
+                  else
+                     pSfr->Add( *pSfrTria) ;
+               }
             }
          }
       }