diff --git a/EXE_GdbGetVol.cpp b/EXE_GdbGetVol.cpp
index 49135c0..73cb6e6 100644
--- a/EXE_GdbGetVol.cpp
+++ b/EXE_GdbGetVol.cpp
@@ -64,3 +64,27 @@ ExeVolZmapPartVolume( int nId, int nPart, double& dVol)
   // restituisco il volume della eventuale parte richiesta
    return ( pVZM != nullptr  &&  pVZM->GetPartVolume( nPart, dVol)) ;
 }
+
+//----------------------------------------------------------------------------
+bool
+ExeVolZmapGetPartMinDist( int nId, const Point3d ptNear, int nRefType, int& nPart)
+{
+   IGeomDB* pGeomDB = GetCurrGeomDB() ;
+   VERIFY_GEOMDB( pGeomDB, false)
+  // verifico il parametro
+   if ( &nPart == nullptr)
+      return false ;
+  // recupero il solido Zmap
+   const IVolZmap* pVZM = GetVolZmap( pGeomDB->GetGeoObj( nId)) ;
+   if ( pVZM == nullptr)
+      return false ;
+  // recupero il riferimento del solido
+   Frame3d frVol ;
+   if ( ! pGeomDB->GetGlobFrame( nId, frVol))
+      return false ;
+  // porto il punto Near nel riferimento dell'entità
+   Point3d ptNearL = GetPointLocal( pGeomDB, ptNear, nRefType, frVol) ;
+  // restituisco il volume della eventuale parte richiesta
+   nPart = pVZM->GetPartMinDistFromPoint( ptNearL) ;
+   return ( nPart >= 0) ;  
+}
diff --git a/EgtExecutor.rc b/EgtExecutor.rc
index 645036a..291c116 100644
Binary files a/EgtExecutor.rc and b/EgtExecutor.rc differ
diff --git a/LUA_GdbGetVol.cpp b/LUA_GdbGetVol.cpp
index c61c3a1..c264e0f 100644
--- a/LUA_GdbGetVol.cpp
+++ b/LUA_GdbGetVol.cpp
@@ -118,6 +118,28 @@ LuaVolZmapGetPartBBoxGlob( lua_State* L)
    return 1 ;
 }
 
+//----------------------------------------------------------------------------
+static int
+LuaVolZmapGetPartMinDist( lua_State* L)
+{
+  // 2 o 3 parametri : nId, ptNear [, nRefType]
+   int nId ;
+   LuaCheckParam( L, 1, nId)
+   Point3d ptNear ;
+   LuaCheckParam( L, 2, ptNear)
+   int nRefType = RTY_DEFAULT ;
+   LuaGetParam( L, 3, nRefType) ;
+   LuaClearStack( L) ;
+  // ricerca
+   int nPart ;
+   bool bOk = ExeVolZmapGetPartMinDist( nId, ptNear, nRefType, nPart) ;
+   if ( bOk)
+      LuaSetParam( L, nPart) ;
+   else
+      LuaSetParam( L) ;
+   return 1 ;
+}
+
 //----------------------------------------------------------------------------
 static int
 LuaCopyVolZmapPart( lua_State* L)
@@ -207,6 +229,7 @@ LuaInstallGdbGetVol( LuaMgr& luaMgr)
    bOk = bOk && luaMgr.RegisterFunction( "EgtVolZmapPartVolume", LuaVolZmapPartVolume) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtVolZmapGetPartBBox", LuaVolZmapGetPartBBox) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtVolZmapGetPartBBoxGlob", LuaVolZmapGetPartBBoxGlob) ;
+   bOk = bOk && luaMgr.RegisterFunction( "EgtVolZmapGetPartMinDist", LuaVolZmapGetPartMinDist) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtCopyVolZmapPart", LuaCopyVolZmapPart) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtVolZmapGetDepth", LuaVolZmapGetDepth) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtVolZmapGetEdges", LuaVolZmapGetEdges) ;