diff --git a/EgtGeomKernel.vcxproj b/EgtGeomKernel.vcxproj
index e39d247..a83c0ba 100644
--- a/EgtGeomKernel.vcxproj
+++ b/EgtGeomKernel.vcxproj
@@ -325,6 +325,7 @@ copy $(TargetPath) \EgtProg\Dll64</Command>
     <ClCompile Include="FontOs.cpp" />
     <ClCompile Include="OffsetCurveOnX.cpp" />
     <ClCompile Include="RemoveCurveOverlaps.cpp" />
+    <ClCompile Include="RemoveCurveSpikes.cpp" />
     <ClCompile Include="SelfIntersCurve.cpp" />
     <ClCompile Include="SfrCreate.cpp" />
     <ClCompile Include="SurfFlatRegion.cpp" />
@@ -490,6 +491,7 @@ copy $(TargetPath) \EgtProg\Dll64</Command>
     <ClInclude Include="ObjGraphicsMgr.h" />
     <ClInclude Include="FontOs.h" />
     <ClInclude Include="RemoveCurveOverlaps.h" />
+    <ClInclude Include="RemoveCurveSpikes.h" />
     <ClInclude Include="SurfFlatRegion.h" />
     <ClInclude Include="TextureData.h" />
     <ClInclude Include="UserObjDefault.h" />
diff --git a/EgtGeomKernel.vcxproj.filters b/EgtGeomKernel.vcxproj.filters
index 4d4b58d..e90a76d 100644
--- a/EgtGeomKernel.vcxproj.filters
+++ b/EgtGeomKernel.vcxproj.filters
@@ -354,6 +354,9 @@
     <ClCompile Include="VolTriZmapVolume.cpp">
       <Filter>File di origine\Geo</Filter>
     </ClCompile>
+    <ClCompile Include="RemoveCurveSpikes.cpp">
+      <Filter>File di origine\GeoInters</Filter>
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="stdafx.h">
@@ -776,6 +779,9 @@
     <ClInclude Include="IntersLineSurfTm.h">
       <Filter>File di intestazione</Filter>
     </ClInclude>
+    <ClInclude Include="RemoveCurveSpikes.h">
+      <Filter>File di intestazione</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <ResourceCompile Include="EgtGeomKernel.rc">
diff --git a/IntersLineLine.cpp b/IntersLineLine.cpp
index 0254c80..7092c79 100644
--- a/IntersLineLine.cpp
+++ b/IntersLineLine.cpp
@@ -149,7 +149,7 @@ IntersLineLine::IntersFiniteLines( const ICurveLine& Line1, const ICurveLine& Li
   // flag per linee parallele
    bool bParallel = ( fabs( dCrossXY) < SIN_EPS_ANG_ZERO * ( dLen1XY * dLen2XY)) ;
   // flag per segmenti che si allontanano significativamente
-   bool bFarEnds = ( ( fabs( dCrossXY) > sin( 1 * DEGTORAD) * ( dLen1XY * dLen2XY))  ||
+   bool bFarEnds = ( ( fabs( dCrossXY) > SIN_EPS_ANG_SMALL * ( dLen1XY * dLen2XY))  ||
                      IsPointOutFatSegment( ptS1, ptS2, vtDir2, dLen2XY, EPS_SMALL)  ||
                      IsPointOutFatSegment( ptE1, ptS2, vtDir2, dLen2XY, EPS_SMALL)  ||
                      IsPointOutFatSegment( ptS2, ptS1, vtDir1, dLen1XY, EPS_SMALL)  ||
diff --git a/RemoveCurveSpikes.cpp b/RemoveCurveSpikes.cpp
new file mode 100644
index 0000000..278fd03
--- /dev/null
+++ b/RemoveCurveSpikes.cpp
@@ -0,0 +1,74 @@
+//----------------------------------------------------------------------------
+//  EgalTech 2017-2017
+//----------------------------------------------------------------------------
+// File : RemoveCurveSpikes.cpp     Data : 02.10.17      Versione : 1.8j1
+// Contenuto : Implementazione rimozione spikes di curva.
+//
+//
+//
+// Modifiche : 02.10.17 DS Creazione modulo.
+//
+//
+//----------------------------------------------------------------------------
+
+//--------------------------- Include ----------------------------------------
+#include "stdafx.h"
+#include "GeoConst.h"
+#include "CurveComposite.h"
+#include "DistPointLine.h"
+#include "RemoveCurveSpikes.h"
+#include <algorithm>
+
+using namespace std ;
+
+//----------------------------------------------------------------------------
+bool
+RemoveCurveSpikes( ICurveComposite* pCurve)
+{
+  // verifico validità curva
+   if ( pCurve == nullptr)
+      return false ;
+  // recupero il numero di curve semplici componenti la composta
+   int nCrvCount = pCurve->GetCurveCount() ;
+   if ( nCrvCount < 2  ||  ( nCrvCount < 3  &&  pCurve->IsClosed()))
+      return true ;
+  // ciclo sulle curve elementari della composita
+   int nStart = pCurve->IsClosed() ? 0 : 1 ;
+   for ( int i = nStart ; i < nCrvCount ; ++ i) {
+     // recupero due curve consecutive
+      const ICurve* pPrevCrv = pCurve->GetCurve( ( i > 0 ? i - 1 : nCrvCount - 1)) ;
+      const ICurve* pNextCrv = pCurve->GetCurve( i) ;
+     // se sono entrambe rette
+      if ( pPrevCrv->GetType() == CRV_LINE  &&  pNextCrv->GetType() == CRV_LINE) {
+        // recupero i punti estremi
+         Point3d ptStart ; pPrevCrv->GetStartPoint( ptStart) ;
+         Point3d ptMid ; pPrevCrv->GetEndPoint( ptMid) ;
+         Point3d ptEnd ; pNextCrv->GetEndPoint( ptEnd) ;
+        // recupero le direzioni negli estremi
+         Vector3d vtPrev ; pPrevCrv->GetStartDir( vtPrev) ;
+         Vector3d vtNext ; pNextCrv->GetStartDir( vtNext) ;
+        // verifico se spike
+         double dPrevDist, dNextDist ;
+         if ( vtPrev * vtNext < cos( 175 * DEGTORAD)  &&  
+              (( DistPointLine( ptStart, ptMid, ptEnd).GetDist( dPrevDist)  &&  dPrevDist < EPS_SMALL)  ||
+               ( DistPointLine( ptEnd, ptStart, ptMid).GetDist( dNextDist)  &&  dNextDist < EPS_SMALL))) {
+           // se spike ha base abbastanza larga, basta togliere uno dei due lati
+            if ( SqDist( ptStart, ptEnd) > SQ_EPS_SMALL) {
+               pCurve->RemoveJoint( i) ;
+               -- nCrvCount ;
+               -- i ;
+            }
+           // altrimenti bisogna togliere entrambi
+            else {
+               pCurve->RemoveJoint( i - 1) ;
+               pCurve->RemoveJoint( i) ;
+               nCrvCount -= 2 ;
+               i = max( i - 2, nStart - 1) ;
+            }
+         }
+      }
+     // !!! Aggiungere la gestione degli altri tipi di curve !!!
+   }
+
+   return true ;
+}
\ No newline at end of file
diff --git a/RemoveCurveSpikes.h b/RemoveCurveSpikes.h
new file mode 100644
index 0000000..e301a6b
--- /dev/null
+++ b/RemoveCurveSpikes.h
@@ -0,0 +1,20 @@
+//----------------------------------------------------------------------------
+//  EgalTech 2017-2017
+//----------------------------------------------------------------------------
+// File : RemoveCurveSpikes.h       Data : 02.10.17       Versione : 1.8j1
+// Contenuto : Dichiarazione funzione rimozione spikes curve.
+//
+//
+//
+// Modifiche : 02.10.17 DS Creazione modulo.
+//
+//
+//----------------------------------------------------------------------------
+
+#pragma once
+
+#include "/EgtDev/Include/EGkCurveComposite.h"
+
+
+//----------------------------------------------------------------------------
+bool RemoveCurveSpikes( ICurveComposite* pCurve) ;
diff --git a/SurfFlatRegion.cpp b/SurfFlatRegion.cpp
index 37ca734..22f9d04 100644
--- a/SurfFlatRegion.cpp
+++ b/SurfFlatRegion.cpp
@@ -20,6 +20,7 @@
 #include "CurveAux.h"
 #include "CurveComposite.h"
 #include "RemoveCurveOverlaps.h"
+#include "RemoveCurveSpikes.h"
 #include "GeoConst.h"
 #include "/EgtDev/Include/EGkStringUtils3d.h"
 #include "/EgtDev/Include/EGkUiUnits.h"
@@ -97,10 +98,14 @@ SurfFlatRegion::AddExtLoop( ICurve* pCrv)
   // aggiungo le singole curve
    bool bOk = true ;
    for ( auto& pCrv : CrvLst) {
-     // se curva composita, unisco eventuali tratti allineati
+     // se curva composita
       CurveComposite* pCrvCo = GetBasicCurveComposite( pCrv) ;
-      if ( pCrvCo != nullptr)
+      if ( pCrvCo != nullptr) {
+        // unisco eventuali tratti allineati
          pCrvCo->MergeCurves( LIN_TOL_MIN, ANG_TOL_STD_DEG) ;
+        // elimino eventuali spikes
+         RemoveCurveSpikes( pCrvCo) ;
+      }
      // aggiungo il loop
       if ( ! AddSimpleExtLoop( pCrv))
          bOk = false ;
@@ -239,10 +244,14 @@ SurfFlatRegion::AddIntLoop( ICurve* pCrv)
   // aggiungo le singole curve
    bool bOk = true ;
    for ( auto& pCrv : CrvLst) {
-     // se curva composita, unisco eventuali tratti allineati
+     // se curva composita
       CurveComposite* pCrvCo = GetBasicCurveComposite( pCrv) ;
-      if ( pCrvCo != nullptr)
+      if ( pCrvCo != nullptr) {
+        // unisco eventuali tratti allineati
          pCrvCo->MergeCurves( LIN_TOL_MIN, ANG_TOL_STD_DEG) ;
+        // elimino eventuali spikes
+         RemoveCurveSpikes( pCrvCo) ;
+      }
      // aggiungo il loop
       if ( ! AddSimpleIntLoop( pCrv))
          bOk = false ;