diff --git a/API_GeoSnap.cpp b/API_GeoSnap.cpp
index c376a88..9bad4c8 100644
--- a/API_GeoSnap.cpp
+++ b/API_GeoSnap.cpp
@@ -504,6 +504,23 @@ __stdcall EgtSurfTmFacetNormVersor( int nId, int nFacet, int nRefId, double vtNo
    return TRUE ;
 }
 
+//----------------------------------------------------------------------------
+BOOL
+__stdcall EgtSurfTmFacetOppositeSide( int nId, int nFacet, const double vtDir[3], int nRefId, double ptP1[3], double ptP2[3])
+{
+  // verifica parametri
+   if ( vtDir == nullptr  ||  ptP1 == nullptr  ||  ptP2 == nullptr)
+      return FALSE ;
+  // recupero gli estremi del lato opposto
+   Point3d ptMyP1, ptMyP2 ;
+   if ( ! ExeSurfTmFacetOppositeSide( nId, nFacet, vtDir, nRefId, ptMyP1, ptMyP2))
+      return FALSE ;
+  // assegno risultati
+   VEC_FROM_3D( ptP1, ptMyP1)
+   VEC_FROM_3D( ptP2, ptMyP2)
+   return TRUE ;
+}
+
 //----------------------------------------------------------------------------
 BOOL
 __stdcall EgtSurfTmFacetAdjacencies( int nId, int nFacet, int*& vAdj, int* pnCount)
@@ -519,17 +536,22 @@ __stdcall EgtSurfTmFacetAdjacencies( int nId, int nFacet, int*& vAdj, int* pnCou
    int nDim = 0 ;
    for ( int i = 0 ; i < int( vTmp.size()) ; ++ i)
       nDim += int( vTmp[i].size()) + 1 ;
-   vAdj = (int*) malloc( nDim * sizeof( int)) ;
-   if ( vAdj == nullptr)
-      return FALSE ;
    int nCount = 0 ;
-   for ( int i = 0 ; i < int( vTmp.size()) ; ++ i) {
-      for ( int j = 0 ; j < int( vTmp[i].size()) ; ++ j) {
-         vAdj[nCount] = vTmp[i][j] ;
+   if ( nDim == 0) {
+      vAdj = nullptr ;
+   }
+   else {
+      vAdj = (int*) malloc( nDim * sizeof( int)) ;
+      if ( vAdj == nullptr)
+         return FALSE ;
+      for ( int i = 0 ; i < int( vTmp.size()) ; ++ i) {
+         for ( int j = 0 ; j < int( vTmp[i].size()) ; ++ j) {
+            vAdj[nCount] = vTmp[i][j] ;
+            nCount ++ ;
+         }
+         vAdj[nCount] = - 2 ;
          nCount ++ ;
       }
-      vAdj[nCount] = - 2 ;
-      nCount ++ ;
    }
    *pnCount = nCount ;
    return TRUE ;
@@ -552,6 +574,41 @@ __stdcall EgtSurfTmFacetsContact( int nId, int nF1, int nF2, int nRefId, bool* p
    return TRUE ;
 }
 
+//----------------------------------------------------------------------------
+BOOL
+__stdcall EgtSurfTmLineInters( int nId, const double ptP[3], const double vtDir[3], int nRefType, int*& vFlagInters, double*& vParInters, int* pnCount)
+{
+  // verifica parametri
+   if ( ptP == nullptr  ||  vtDir == nullptr  ||  &vFlagInters == nullptr  ||  &vParInters == nullptr  ||  pnCount == nullptr)
+      return FALSE ;
+  // eseguo intersezione
+   INTDBLVECTOR vInters ;
+   if ( ! ExeSurfTmLineInters( nId, ptP, vtDir, nRefType, vInters))
+      return FALSE ;
+  // assegno risultati
+   int nDim = int( vInters.size()) ;
+   if ( nDim == 0) {
+      vFlagInters = nullptr ;
+      vParInters = nullptr ;
+   }
+   else {
+      vFlagInters = (int*) malloc( nDim * sizeof( int)) ;
+      if ( vFlagInters == nullptr)
+         return FALSE ;
+      vParInters = (double*) malloc( nDim * sizeof( double)) ;
+      if ( vParInters == nullptr) {
+         free( vFlagInters) ;
+         return FALSE ;
+      }
+      for ( int i = 0 ; i < nDim ; ++ i) {
+         vFlagInters[i] = vInters[i].first ;
+         vParInters[i] = vInters[i].second ;
+      }
+   }
+   *pnCount = nDim ;
+   return TRUE ;
+}
+
 //----------------------------------------------------------------------------
 BOOL
 __stdcall EgtTextNormVersor( int nId, int nRefId, double vtNorm[3])
diff --git a/EgtInterface.rc b/EgtInterface.rc
index 80bed40..f7480a4 100644
Binary files a/EgtInterface.rc and b/EgtInterface.rc differ