EgtGraphics :

- migliorato lo ZoomOnPoint.

SceneCamera.cpp

@@ -538,6 +538,7 @@ Scene::ZoomOnPoint( const Point3d& ptWin, double dCoeff)
   // modifico opportunamente il centro di vista
    Point3d ptOldCen = m_ptCenter ;
    Point3d ptNewCen = ptWorld + ( m_ptCenter - ptWorld) * dCoeff ;
+   ptNewCen += ( ptWorld - ptNewCen) * m_vtDirCamera * m_vtDirCamera ;
    SetCenter( ptNewCen) ;
    m_bDistOk = true ;
 
@@ -550,7 +551,7 @@ Scene::ZoomOnPoint( const Point3d& ptWin, double dCoeff)
             dCoeff = dMinDist / m_dDistCamera ;
             Point3d ptNewCenter = ptWorld + ( ptOldCen - ptWorld) * dCoeff ;
             SetCenter( ptNewCenter) ;
-         }      
+         }
       }
       else {
         // nel caso standard verifico se il nuovo fov supera il valore massimo
@@ -558,9 +559,9 @@ Scene::ZoomOnPoint( const Point3d& ptWin, double dCoeff)
            // adatto il coefficiente di zoom e ricalcolo il centro 
             dCoeff = PERSPECTIVE_TAN_MAX_FOV * m_dDistCamera / m_dHalfHeight ;
             Point3d ptNewCenter = ptWorld + ( ptOldCen - ptWorld) * dCoeff ;
-            SetCenter( ptNewCenter) ;            
+            SetCenter( ptNewCenter) ;
          }
-      }  
+      }
    }
 
    return ZoomChange( dCoeff) ;