diff --git a/EXE_GdbCreateSurf.cpp b/EXE_GdbCreateSurf.cpp
index 5e8cb83..c31540c 100644
--- a/EXE_GdbCreateSurf.cpp
+++ b/EXE_GdbCreateSurf.cpp
@@ -1640,6 +1640,8 @@ ExeCreateSurfBezier( int nParentId, int nDegU, int nDegV, int nSpanU, int nSpanV
       if ( ! pSurfBez->SetControlPoint( i, ptCtrl))
          bOk = false ;
    }
+  // calcolo eventuali poli
+   pSurfBez->CalcPoles() ;
   // se superficie nulla (ovvero ridotta a punto), errore
    bOk = bOk && ! pSurfBez->IsAPoint() ;
   // inserisco la superficie nel DB
@@ -1692,6 +1694,8 @@ ExeCreateSurfBezierRational( int nParentId, int nDegU, int nDegV, int nSpanU, in
       if ( ! pSurfBez->SetControlPoint( i, ptCtrl, vPntW[i].second))
          bOk = false ;
    }
+  // calcolo eventuali poli
+   pSurfBez->CalcPoles() ;
   // se superficie nulla (ovvero ridotta a punto), errore
    bOk = bOk && ! pSurfBez->IsAPoint() ;
   // inserisco la superficie nel DB
@@ -1785,6 +1789,74 @@ ExeCreateSurfBezierLeaves( int nParentId, int nSurfBzId, int nTextHeight, bool b
    return nFirstId ;
 }
 
+//-------------------------------------------------------------------------------
+int
+ExeCreateSurfBezierTria2D( int nParentId, int nSurfBzId, int nTextHeight, bool bShowTrim, int* pnCount)
+{
+   IGeomDB* pGeomDB = GetCurrGeomDB() ;
+   VERIFY_GEOMDB( pGeomDB, GDB_ID_NULL)
+   nParentId = AdjustId( nParentId) ;
+  // recupero la superficie
+   const ISurfBezier* pSurfBez = GetSurfBezier( pGeomDB->GetGeoObj( nSurfBzId)) ;
+   if ( pSurfBez == nullptr)
+      return GDB_ID_NULL ;
+  // disegno i triangoli
+   vector<tuple<int,Point3d,Point3d,Point3d>> vTria2D ;
+   pSurfBez->GetTriangles2D( vTria2D) ;
+   int nFirstId = GDB_ID_NULL ;
+   int nCount = 0 ;
+   bool bOk = true ;
+   for ( int k = 0 ; k < (int)vTria2D.size() ; ++ k) {
+      PtrOwner<ISurfTriMesh> pStm( CreateSurfTriMesh()) ;
+      bOk = bOk && ! IsNull( pStm) ;
+      Point3d ptP1L =  get<1>(vTria2D[k]) ;
+      Point3d ptP2L =  get<2>(vTria2D[k]) ;
+      Point3d ptP3L =  get<3>(vTria2D[k]) ;
+      // assegno il triangolo
+      if ( bOk) {
+         pStm->Init( 3, 1, 1) ;
+         int vV[3]{ pStm->AddVertex( ptP1L),
+                    pStm->AddVertex( ptP2L),
+                    pStm->AddVertex( ptP3L)} ;
+         bOk = ( pStm->AddTriangle( vV) != SVT_NULL) && pStm->AdjustTopology() ;
+      }
+      // inserisco la superficie nel DB
+      int nNewId = ( bOk ? pGeomDB->AddGeoObj( GDB_ID_NULL, nParentId, Release( pStm)) : GDB_ID_NULL) ;
+      if ( nNewId == GDB_ID_NULL)
+         return GDB_ID_NULL ;
+      if ( nFirstId == GDB_ID_NULL)
+         nFirstId = nNewId ;
+      ++ nCount ;
+      
+     // creo il testo e lo riempio
+      string sText = ToString( get<0>( vTria2D[k])) ;
+      Point3d ptCenter( ( ptP1L + ptP2L + ptP3L) / 3) ;
+      PtrOwner<IExtText> pTXT( CreateExtText()) ;
+      if ( IsNull( pTXT)  ||  ! pTXT->Set( ptCenter, Z_AX, X_AX, sText, "", false, nTextHeight))
+         return GDB_ID_NULL ;
+     // inserisco il testo nel DB
+      int nTxtId = pGeomDB->AddGeoObj( GDB_ID_NULL, nParentId, Release( pTXT)) ;
+      if ( nTxtId == GDB_ID_NULL)
+         return GDB_ID_NULL ;
+      ++ nCount ;
+   }
+  // se richiesto disegno la regione di trim
+   const ISurfFlatRegion* pSfr = pSurfBez->GetTrimRegion() ;
+   if ( bShowTrim  &&  pSfr != nullptr) {
+      PtrOwner<ISurfFlatRegion> pTrimReg( pSfr->Clone()) ;
+      if ( ! IsNull( pTrimReg)) {
+         int nTrimId = pGeomDB->AddGeoObj( GDB_ID_NULL, nParentId, Release( pTrimReg)) ;
+         if ( nTrimId == GDB_ID_NULL)
+            return GDB_ID_NULL ;
+         ++ nCount ;
+      }
+   }
+  // restituisco i risultati
+   if ( pnCount != nullptr)
+      *pnCount = nCount ;
+   return nFirstId ;
+}
+
 //-------------------------------------------------------------------------------
 int
 ExeCreateBezierSphere( int nParentId, const Point3d& ptCenter, double dR, int nRefType) {
@@ -1799,6 +1871,7 @@ ExeCreateBezierSphere( int nParentId, const Point3d& ptCenter, double dR, int nR
    Point3d ptCenterLoc = GetPointLocal( pGeomDB, ptCenter, nRefType, frLoc) ;
   // Creo la superficie
    PtrOwner<ISurfBezier> pSurfBez( CreateBezierSphere( ptCenterLoc, dR)) ;
+   pSurfBez->CalcPoles() ;
    int nId = ( bOk ? pGeomDB->AddGeoObj( GDB_ID_NULL, nParentId, Release( pSurfBez)) : GDB_ID_NULL) ;
    ExeSetModified() ;
    // se richiesto, salvo il comando Lua equivalente
diff --git a/LUA_GdbCreateSurf.cpp b/LUA_GdbCreateSurf.cpp
index 6549194..d703099 100644
--- a/LUA_GdbCreateSurf.cpp
+++ b/LUA_GdbCreateSurf.cpp
@@ -903,6 +903,39 @@ LuaCreateSurfBezierLeaves( lua_State* L)
    return 2 ;
 }
 
+//-------------------------------------------------------------------------------
+static int
+LuaCreateSurfBezierTria2D( lua_State* L)
+{
+   // 2, 3 o 4 parametri : ParentId, nId [, nTextHeight] [, bShowTrim]
+   int nParentId ;
+   LuaCheckParam( L, 1, nParentId)
+      int nSurfBzId ;
+   LuaCheckParam( L, 2, nSurfBzId)
+      int nTextHeight = 50 ;
+   bool bShowTrim = false ;
+   if ( LuaGetParam( L, 3, nTextHeight))
+      LuaGetParam( L, 4, bShowTrim) ;
+   else
+      LuaGetParam( L, 3, bShowTrim) ;
+   LuaClearStack( L) ;
+   // creo la superficie
+   int nCount = 0 ;
+   int nId = ExeCreateSurfBezierTria2D( nParentId, nSurfBzId, nTextHeight, bShowTrim, &nCount) ;
+   // restituisco il risultato
+   if ( nId != GDB_ID_NULL) {
+      LuaSetParam( L, nId) ;
+      LuaSetParam( L, nCount) ;  
+   }
+   else {
+      LuaSetParam( L) ;
+      LuaSetParam( L) ;
+   }
+   return 2 ;
+}
+
+
+
 //-------------------------------------------------------------------------------
 static int
 LuaCreateBezierSphere( lua_State* L)
@@ -968,6 +1001,7 @@ LuaInstallGdbCreateSurf( LuaMgr& luaMgr)
    bOk = bOk && luaMgr.RegisterFunction( "EgtSurfBezier", LuaCreateSurfBezier) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtSurfBezierRat", LuaCreateSurfBezierRational) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtSurfBezierLeaves", LuaCreateSurfBezierLeaves) ;
+   bOk = bOk && luaMgr.RegisterFunction( "EgtSurfBezierTria2D", LuaCreateSurfBezierTria2D) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtCreateBezierSphere", LuaCreateBezierSphere) ;
    return bOk ;
 }