EgtGraphics 1.5b5 :

- aggiunto ZoomWin
- aggiunto DrawRectWin.

SceneCamera.cpp

@@ -191,6 +191,23 @@ Scene::CalcDirUp( void)
    return m_bUpOk ;
 }
 
+//----------------------------------------------------------------------------
+bool
+Scene::CalcCameraFrame( Frame3d& frView)
+{
+  // verifico direzione camera Up
+   if ( ! CalcDirUp())
+      return false ;
+  // eseguo il calcolo
+   Vector3d vtZ = m_vtDirCamera ;
+   Vector3d vtY = m_vtUp ;
+   Vector3d vtX = vtY ^ vtZ ;
+   if ( ! frView.Set( m_ptCenter + m_dDistCamera * vtZ, vtX, vtY, vtZ))
+      return false ;
+
+   return true ;
+} 
+
 //----------------------------------------------------------------------------
 bool
 Scene::PanCamera( const Point3d& ptWinOld, const Point3d& ptWinNew)
@@ -294,3 +311,38 @@ Scene::ZoomOnPoint( const Point3d& ptWin, double dCoeff)
   // eseguo lo zoom
    return ZoomChange( dCoeff) ;
 }
+
+//----------------------------------------------------------------------------
+bool
+Scene::ZoomWin( const Point3d& ptWin1, const Point3d& ptWin2)
+{
+  // porto i punti in coordinate mondo
+   Point3d ptWorld1 ;
+   if ( ! UnProject( Point3d( ptWin1.x, ptWin1.y, GetProjectedCenter().z), ptWorld1))
+      return false ;
+   Point3d ptWorld2 ;
+   if ( ! UnProject( Point3d( ptWin2.x, ptWin2.y, GetProjectedCenter().z), ptWorld2))
+      return false ;
+
+  // recupero il riferimento della camera (vista)
+   Frame3d frView ;
+   if ( ! CalcCameraFrame( frView))
+      return false ;
+
+  // porto i punti in coordinate camera (vista)
+   Point3d ptView1 = ptWorld1 ;
+   ptView1.ToLoc( frView) ;
+   Point3d ptView2 = ptWorld2 ;
+   ptView2.ToLoc( frView) ;
+
+  // imposto il nuovo centro di vista
+   Point3d ptNewCen = 0.5 * ( ptWorld1 + ptWorld2) ; 
+   SetCenter( ptNewCen) ;
+
+  // imposto il nuovo zoom
+   double dHalfWidth = 0.5 * fabs( ptView1.x - ptView2.x) ;
+   double dHalfHeight = 0.5 * fabs( ptView1.y - ptView2.y) ;
+
+  // adatto le dimensioni a quelle della vista
+   return AdjustDimView( dHalfWidth, dHalfHeight) ;
+}