diff --git a/EXE_GeoInters.cpp b/EXE_GeoInters.cpp
index 2ee0acc..3b88304 100644
--- a/EXE_GeoInters.cpp
+++ b/EXE_GeoInters.cpp
@@ -33,6 +33,7 @@
 #include "/EgtDev/Include/EGkIntersLineBox.h"
 #include "/EgtDev/Include/EGkIntersPlaneBox.h"
 #include "/EgtDev/Include/EGkIntersLineSurfTm.h"
+#include "/EgtDev/Include/EGkIntersLineSurfBez.h"
 #include "/EgtDev/Include/EGkIntersPlaneSurfTm.h"
 #include "/EgtDev/Include/EGkIntersSurfTmSurfTm.h"
 #include "/EgtDev/Include/EGkIntersLinePlane.h"
@@ -271,6 +272,116 @@ ExeLineSurfTmInters( const Point3d& ptP, const Vector3d& vtDir, int nId, int nRe
    return bOk ;
 }
 
+//-------------------------------------------------------------------------------
+static bool
+MyLineSurfBzInters( const Point3d& ptP, const Vector3d& vtDir, int nId, int nRefType,
+                    INTDBLVECTOR& vInters)
+{
+   vInters.clear() ;
+   IGeomDB* pGeomDB = GetCurrGeomDB() ;
+   VERIFY_GEOMDB( pGeomDB, false)
+  // recupero la superficie Bezier
+   const ISurfBezier* pSbz = GetSurfBezier( pGeomDB->GetGeoObj( nId)) ;
+   if ( pSbz == nullptr)
+      return false ;
+   // recupero il suo riferimento globale
+   Frame3d frSurf ;
+   if ( ! pGeomDB->GetGlobFrame( nId, frSurf))
+      return false ;
+   // porto in locale il punto e la direzione della linea
+   Point3d ptPL = GetPointLocal( pGeomDB, ptP, nRefType, frSurf) ;
+   Vector3d vtDirL = GetVectorLocal( pGeomDB, vtDir, nRefType, frSurf) ;
+   vtDirL.Normalize() ;
+   // calcolo l'ingombro della Bezier
+   BBox3d b3Surf ;
+   if ( ! pSbz->GetLocalBBox( b3Surf))
+      return false ;
+   // calcolo l'intersezione
+   double dLen = b3Surf.MaxDistFromPoint( ptPL) ;
+   ILSBIVECTOR vInfo ;
+   if ( ! IntersLineSurfBz( ptPL, vtDirL, dLen, pSbz, vInfo, false))
+      return false ;
+   // ciclo sulle intersezioni
+   for ( const auto& Info : vInfo) {
+      // se intersezione puntuale
+      if ( Info.nILTT == ILTT_VERT  ||  Info.nILTT == ILTT_EDGE  ||  Info.nILTT == ILTT_IN) {
+         int nFlag = SLT_TOUCH ;
+         if ( Info.dCosDN > EPS_ZERO)
+            nFlag = SLT_OUT ;
+         else if ( Info.dCosDN < -EPS_ZERO)
+            nFlag = SLT_IN ;
+         vInters.emplace_back( nFlag, Info.dU) ;
+      }
+      // se altrimenti intersezione con coincidenza
+      else if ( Info.nILTT == ILTT_SEGM  ||  Info.nILTT == ILTT_SEGM_ON_EDGE) {
+         vInters.emplace_back( SLT_TG_INI, Info.dU) ;
+         vInters.emplace_back( SLT_TG_FIN, Info.dU2) ;
+      }
+   }
+   // elimino intersezioni ripetute
+   for ( size_t j = 1 ; j < vInters.size() ; ) {
+      // intersezione precedente
+      size_t i = j - 1 ;
+      // se hanno lo stesso parametro 
+      if ( abs( vInters[i].second - vInters[j].second) < EPS_SMALL) {
+         // se sono entrambe entranti o uscenti, elimino la seconda
+         if ( ( vInters[i].first == SLT_IN  &&  vInters[j].first == SLT_IN)  ||
+            ( vInters[i].first == SLT_OUT  &&  vInters[j].first == SLT_OUT)) {
+            vInters.erase( vInters.begin() + j) ;
+            continue ;
+         }
+         // se una entrante e l'altra uscente, cambio in touch ed elimino la seconda
+         else if ( ( vInters[i].first == SLT_IN  &&  vInters[j].first == SLT_OUT)  ||
+            ( vInters[i].first == SLT_OUT  &&  vInters[j].first == SLT_IN)) {
+            vInters[i].first = SLT_TOUCH ;
+            vInters.erase( vInters.begin() + j) ;
+            continue ;
+         }
+         // se una puntuale e l'altra inizio di coincidenza, elimino la prima
+         else if ( ( vInters[i].first == SLT_IN  ||  vInters[i].first == SLT_OUT  ||  vInters[i].first == SLT_TOUCH)  &&  vInters[j].first == SLT_TG_INI) {
+            vInters.erase( vInters.begin() + i) ;
+            continue ;
+         }
+         // se una fine di coincidenza e l'altra puntuale, elimino la seconda
+         else if ( vInters[i].first == SLT_TG_FIN  &&  ( vInters[j].first == SLT_IN  ||  vInters[j].first == SLT_OUT  ||  vInters[j].first == SLT_TOUCH)) {
+            vInters.erase( vInters.begin() + j) ;
+            continue ;
+         }
+         // se una fine di coincidenza e l'altra inizio di coincidenza, elimino entrambe
+         else if ( i > 0  &&  vInters[i].first == SLT_TG_FIN  &&  vInters[j].first == SLT_TG_INI) {
+            vInters.erase( vInters.begin() + j) ;
+            vInters.erase( vInters.begin() + i) ;
+            -- j ;
+            continue ;
+         }
+      }
+      // passo alla successiva
+      ++ j ;
+   }
+
+   return true ;
+}
+
+//-------------------------------------------------------------------------------
+bool
+ExeLineSurfBzInters( const Point3d& ptP, const Vector3d& vtDir, int nId, int nRefType,
+                     INTDBLVECTOR& vInters)
+{
+   // eseguo
+   bool bOk = MyLineSurfBzInters( ptP, vtDir, nId, nRefType, vInters) ;
+   // se richiesto, salvo il comando Lua equivalente
+   if ( IsCmdLog()) {
+      string sLua = "EgtLineSurfBzInters({" + ToString( ptP) + "},{" +
+         ToString( vtDir) + "}," +
+         ToString( nId) + "," +
+         RefTypeToString( nRefType) + ")" +
+         " -- Ok=" + ToString( bOk) ;
+      LOG_INFO( GetCmdLogger(), sLua.c_str()) ;
+   }
+   // restituisco l'identificativo della prima nuova entità
+   return bOk ;
+}
+
 //-------------------------------------------------------------------------------
 static bool
 MyLineVolZmapInters( const Point3d& ptP, const Vector3d& vtDir, int nId, int nRefType, INTDBLVECTOR& vInters)
diff --git a/LUA_GeoInters.cpp b/LUA_GeoInters.cpp
index a4c9eca..54dd1cc 100644
--- a/LUA_GeoInters.cpp
+++ b/LUA_GeoInters.cpp
@@ -123,6 +123,41 @@ LuaLineSurfTmInters( lua_State* L)
    return 3 ;
 }
 
+//----------------------------------------------------------------------------
+static int
+LuaLineSurfBzInters( lua_State* L)
+{
+   // 3 o 4 parametri : ptP, vtDir, Id, [, nRefId]
+   Point3d ptP ;
+   LuaCheckParam( L, 1, ptP)
+      Vector3d vtDir ;
+   LuaCheckParam( L, 2, vtDir)
+      int nId ;
+   LuaCheckParam( L, 3, nId)
+      int nRefType = nId ;
+   LuaGetParam( L, 4, nRefType) ;
+   LuaClearStack( L) ;
+   // recupero i punti di intersezione tra linea e superficie trimesh
+   INTDBLVECTOR vInters ;
+   if ( ExeLineSurfBzInters( ptP, vtDir, nId, nRefType, vInters)) {
+      LuaSetParam( L, true) ;
+      INTVECTOR vType( vInters.size()) ;
+      DBLVECTOR vPar( vInters.size()) ;
+      for ( size_t i = 0 ; i < vInters.size() ; ++ i) {
+         vType[i] = vInters[i].first ;
+         vPar[i] = vInters[i].second ;
+      }
+      LuaSetParam( L, vType) ;
+      LuaSetParam( L, vPar) ;
+   }
+   else {
+      LuaSetParam( L) ;
+      LuaSetParam( L) ;
+      LuaSetParam( L) ;
+   }
+   return 3 ;
+}
+
 //----------------------------------------------------------------------------
 static int
 LuaLineVolZmapInters( lua_State* L)
@@ -379,6 +414,7 @@ LuaInstallGeoInters( LuaMgr& luaMgr)
    bOk = bOk && luaMgr.RegisterFunction( "EgtLineCurveInters", LuaLineCurveInters) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtLineBoxInters", LuaLineBoxInters) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtLineSurfTmInters", LuaLineSurfTmInters) ;
+   bOk = bOk && luaMgr.RegisterFunction( "EgtLineSurfBzInters", LuaLineSurfBzInters) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtLineVolZmapInters", LuaLineVolZmapInters) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtPlaneCurveInters", LuaPlaneCurveInters) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtPlaneBoxInters", LuaPlaneBoxInters) ;