diff --git a/EgtGraphics.rc b/EgtGraphics.rc
index 73ce376..c8e49b3 100644
Binary files a/EgtGraphics.rc and b/EgtGraphics.rc differ
diff --git a/ObjNewGraphics.cpp b/ObjNewGraphics.cpp
index 86bd4b5..8339840 100644
--- a/ObjNewGraphics.cpp
+++ b/ObjNewGraphics.cpp
@@ -241,19 +241,28 @@ ObjNewGraphics::AddTriangle( const Triangle3d& Tria, const TriFlags3d& TFlags, c
       return false ;
   // recupero il conteggio dei vertici
    int nCount = m_ngaList.back().m_nCount ;
-  // emetto i flag, le normali e i vertici del triangolo + aggiorno bbox
+  // emetto i vertici, le normali e i flag del triangolo
+   #pragma pack( push, 1)
+   struct VnfBuf {
+      Vert3f v3V ;
+      Vert3f v3N ;
+      unsigned char cFlag ;
+   } ;
+   #pragma pack( pop)
+   VnfBuf Buffer[3] ;
    for ( int i = 0 ; i < 3 ; ++ i) {
-      Vert3f v3V( Tria.GetP( i)) ;
-      glBufferSubData( GL_ARRAY_BUFFER, nCount * SIZEVNF, SIZEV3F, &v3V) ;
-      m_b3Loc.Add( Tria.GetP( i)) ;
-      Vert3f v3N( TNrms.vtN[i]) ;
-      glBufferSubData( GL_ARRAY_BUFFER, nCount * SIZEVNF + SIZEV3F, SIZEV3F, &v3N) ;
-      unsigned char cFlag = ( TFlags.bFlag[i] ? 1 : 0) ;
-      glBufferSubData( GL_ARRAY_BUFFER, nCount * SIZEVNF + 2 * SIZEV3F, SIZEFLAG, &cFlag) ;
-      ++ nCount ;
+      Buffer[i].v3V = Tria.GetP( i) ;
+      Buffer[i].v3N = TNrms.vtN[i] ;
+      Buffer[i].cFlag = ( TFlags.bFlag[i] ? 1 : 0) ;
    }
+   glBufferSubData( GL_ARRAY_BUFFER, nCount * SIZEVNF, 3 * SIZEVNF, Buffer) ;
   // aggiorno il conteggio
+   nCount += 3 ;
    m_ngaList.back().m_nCount = nCount ;
+  // aggiorno bbox
+   for ( int i = 0 ; i < 3 ; ++ i)
+      m_b3Loc.Add( Tria.GetP( i)) ;
+
    return true ;
 }
 
diff --git a/ObjOldGraphics.cpp b/ObjOldGraphics.cpp
index 5ba08b6..30e7253 100644
--- a/ObjOldGraphics.cpp
+++ b/ObjOldGraphics.cpp
@@ -20,6 +20,10 @@
 #include "/EgtDev/Include/EGkGdbConst.h"
 #include "/EgtDev/Include/EGKTriangle3d.h"
 
+//----------------------------------------------------------------------------
+const int VECT_HEAP = 20 ;
+
+
 //----------------------------------------------------------------------------
 ObjOldGraphics::~ObjOldGraphics( void)
 {
@@ -38,7 +42,7 @@ ObjOldGraphics::Reset( void)
 void
 ObjOldGraphics::Clear( void)
 {
-   m_ogaList.clear() ;
+   m_ogaVect.clear() ;
    m_bValid = false ;
    m_nCurrMode = GL_NONE ;
 }
@@ -100,6 +104,8 @@ ObjOldGraphics::AddLines( const PNTVECTOR& vPnt, bool bAux)
   // modo corrente deve essere nullo
    if ( m_nCurrMode != GL_NONE)
       return false ;
+  // riservo memoria per vettore
+   m_ogaVect.reserve( VECT_HEAP + vPnt.size()) ;
   // start
    AddStart( GL_LINES, bAux) ;
   // inserisco i vertici + aggiorno bbox
@@ -122,6 +128,8 @@ ObjOldGraphics::AddPolyLine( const PolyLine& PL, bool bAux)
   // modo corrente deve essere nullo
    if ( m_nCurrMode != GL_NONE)
       return false ;
+  // riservo memoria per vettore
+   m_ogaVect.reserve( VECT_HEAP + PL.GetPointNbr()) ;
   // start
    AddStart( GL_LINE_STRIP, bAux) ;
   // inserisco i nuovi vertici + aggiorno bbox
@@ -145,6 +153,8 @@ ObjOldGraphics::StartTriangles( int nNum, bool bAux)
   // modo corrente deve essere nullo
    if ( m_nCurrMode != GL_NONE)
       return false ;
+  // riservo memoria per vettore
+   m_ogaVect.reserve( VECT_HEAP + 3 * nNum) ;
   // inizio emissione triangoli
    AddStart( GL_TRIANGLES, bAux) ;
    m_nCurrMode = GL_TRIANGLES ;
@@ -189,7 +199,7 @@ bool
 ObjOldGraphics::Draw( int nStat, int nMark, bool bSurfSha, int nAlpha, bool bShowAux)
 {
   // se vuoto non faccio alcunché
-   if ( m_ogaList.size() == 0)
+   if ( m_ogaVect.size() == 0)
       return true ;
 
   // gestione stato di visualizzazione
@@ -227,8 +237,8 @@ ObjOldGraphics::Draw( int nStat, int nMark, bool bSurfSha, int nAlpha, bool bSho
 
   // ciclo di disegno
    bool bStartA = false ;
-   OGALIST::iterator iIter ;
-   for ( iIter = m_ogaList.begin() ; iIter != m_ogaList.end() ; ++ iIter) {
+   OGAVECT::iterator iIter ;
+   for ( iIter = m_ogaVect.begin() ; iIter != m_ogaVect.end() ; ++ iIter) {
       switch ( iIter->m_nType) {
       case OgAtom::START :
          glBegin( iIter->m_nMode) ;
@@ -292,8 +302,8 @@ ObjOldGraphics::Draw( int nStat, int nMark, bool bSurfSha, int nAlpha, bool bSho
 
      // ciclo di disegno
       bool bStartA = false ;
-      OGALIST::iterator iIter ;
-      for ( iIter = m_ogaList.begin() ; iIter != m_ogaList.end() ; ++ iIter) {
+      OGAVECT::iterator iIter ;
+      for ( iIter = m_ogaVect.begin() ; iIter != m_ogaVect.end() ; ++ iIter) {
          switch ( iIter->m_nType) {
          case OgAtom::START :
             glBegin( iIter->m_nMode) ;
diff --git a/ObjOldGraphics.h b/ObjOldGraphics.h
index 9f8101e..7d2241d 100644
--- a/ObjOldGraphics.h
+++ b/ObjOldGraphics.h
@@ -52,8 +52,9 @@ class OgAtom {
 } ;
 
 //----------------------------------------------------------------------------
-// Lista di OgAtom
+// Lista e vettore di OgAtom
 typedef std::list<OgAtom>   OGALIST ;
+typedef std::vector<OgAtom>   OGAVECT ;
 
 //----------------------------------------------------------------------------
 class ObjOldGraphics : public ObjEGrGraphics
@@ -89,7 +90,7 @@ class ObjOldGraphics : public ObjEGrGraphics
 
    private :
       bool AddOgAtom( const OgAtom& oga)
-              { try { m_ogaList.push_back( oga) ; }
+              { try { m_ogaVect.push_back( oga) ; }
                 catch(...) { return false ; }
                 return true ; }
       bool AddStart( int nMode, bool bAux = false)
@@ -131,7 +132,7 @@ class ObjOldGraphics : public ObjEGrGraphics
       Scene*  m_pScene ;           // puntatore alla scena
       bool    m_bValid ;           // flag
       int     m_nCurrMode ;        // modo corrente
-      OGALIST m_ogaList ;          // lista di atomi per vecchia grafica
+      OGAVECT m_ogaVect ;          // vettore di atomi per vecchia grafica
       BBox3d  m_b3Loc ;            // BoundingBox locale
 } ;
 
diff --git a/SceneGeom.cpp b/SceneGeom.cpp
index 11cd19b..0982f70 100644
--- a/SceneGeom.cpp
+++ b/SceneGeom.cpp
@@ -363,7 +363,7 @@ Scene::DrawGeoObj( const IGdbIterator& iIter, int nPass, const MdStMkCol& siObj)
             POLYLINELIST lstPL ;
             for ( int k = 0 ; k < 3 ; ++ k) {
                switch ( k) {
-               default : pGraphics->AddColor( BLUE) ; break ;
+               case 0 : pGraphics->AddColor( BLUE) ; break ;
                case 1 : pGraphics->AddColor( RED) ; break ;
                case 2 : pGraphics->AddColor( GREEN) ; break ;
                }