diff --git a/EgtGraphics.rc b/EgtGraphics.rc
index d6ec2cc..4db74ec 100644
Binary files a/EgtGraphics.rc and b/EgtGraphics.rc differ
diff --git a/SceneCamera.cpp b/SceneCamera.cpp
index 87c784e..21032ca 100644
--- a/SceneCamera.cpp
+++ b/SceneCamera.cpp
@@ -14,9 +14,11 @@
 //--------------------------- Include ----------------------------------------
 #include "stdafx.h"
 #include "Scene.h"
-#include "/EgtDev/Include/EgtILogger.h"
-#include "/EgtDev/Include/EGnStringUtils.h"
 #include "/EgtDev/Include/EGkFrame3d.h"
+#include "/EgtDev/Include/EGnStringUtils.h"
+#include "/EgtDev/Include/EgtNumUtils.h"
+#include "/EgtDev/Include/EgtILogger.h"
+
 
 using namespace std ;
 
@@ -538,6 +540,13 @@ Scene::ZoomOnPoint( const Point3d& ptWin, double dCoeff)
    if ( ! UnProject( ptView, ptWorld))
       return false ;
 
+  // verifico che il punto sia nelle dimensioni del mondo geometrico
+   if ( ! m_b3ExtWorld.Encloses( ptWorld)) {
+      ptWorld.x = Clamp( ptWorld.x, m_b3ExtWorld.GetMin().x, m_b3ExtWorld.GetMax().x) ;
+      ptWorld.y = Clamp( ptWorld.y, m_b3ExtWorld.GetMin().y, m_b3ExtWorld.GetMax().y) ;
+      ptWorld.z = Clamp( ptWorld.z, m_b3ExtWorld.GetMin().z, m_b3ExtWorld.GetMax().z) ;
+   }
+
   // modifico opportunamente il centro di vista
    Point3d ptOldCen = m_ptCenter ;
    Point3d ptNewCen = ptWorld + ( m_ptCenter - ptWorld) * dCoeff ;