diff --git a/src/Cockpit/hud.cxx b/src/Cockpit/hud.cxx
index 8f413dce1..15e4837ab 100644
--- a/src/Cockpit/hud.cxx
+++ b/src/Cockpit/hud.cxx
@@ -964,6 +964,12 @@ static void set_hud_color(float r, float g, float b) {
 // all C++.
 //
 void fgUpdateHUD( void ) {
+    fgUpdateHUD( 0.0f, 0.0f, 640.0f, 480.0f );
+}
+
+void fgUpdateHUD( GLfloat x_start, GLfloat y_start,
+                  GLfloat x_end, GLfloat y_end )
+{
   int brightness;
   // int day_night_sw = current_aircraft.controls->day_night_switch;
   int day_night_sw = global_day_night_switch;
@@ -987,7 +993,7 @@ void fgUpdateHUD( void ) {
   glPushMatrix();
 
   glLoadIdentity();
-  gluOrtho2D(0, 640, 0, 480);
+  gluOrtho2D(x_start, x_end, y_start, y_end);
   glMatrixMode(GL_MODELVIEW);
   glPushMatrix();
   glLoadIdentity();
diff --git a/src/Cockpit/hud.hxx b/src/Cockpit/hud.hxx
index 749839439..aa8dc81d4 100644
--- a/src/Cockpit/hud.hxx
+++ b/src/Cockpit/hud.hxx
@@ -907,6 +907,8 @@ extern void HUD_brightkey( bool incr_bright );
 extern int  fgHUDInit( fgAIRCRAFT * /* current_aircraft */ );
 extern int  fgHUDInit2( fgAIRCRAFT * /* current_aircraft */ );
 extern void fgUpdateHUD( void );
+extern void fgUpdateHUD( GLfloat x_start, GLfloat y_start,
+                         GLfloat x_end, GLfloat y_end );
 
 extern void drawOneLine ( UINT x1, UINT y1, UINT x2, UINT y2);
 extern void drawOneLine ( RECT &rect);
diff --git a/src/Cockpit/panel.cxx b/src/Cockpit/panel.cxx
index 9537af7be..8ac2f8e6f 100644
--- a/src/Cockpit/panel.cxx
+++ b/src/Cockpit/panel.cxx
@@ -208,8 +208,14 @@ FGPanel::unbind ()
 /**
  * Update the panel.
  */
+void FGPanel::update ()
+{
+	update(_winx, _winw, _winy, _winh);
+}
+
+
 void
-FGPanel::update ()
+FGPanel::update (GLfloat winx, GLfloat winw, GLfloat winy, GLfloat winh)
 {
 				// Do nothing if the panel isn't visible.
   if (!fgPanelVisible())
@@ -228,7 +234,7 @@ FGPanel::update ()
   glMatrixMode(GL_PROJECTION);
   glPushMatrix();
   glLoadIdentity();
-  gluOrtho2D(_winx, _winx + _winw, _winy, _winy + _winh);
+  gluOrtho2D(winx, winx + winw, winy, winy + winh);
 
   glMatrixMode(GL_MODELVIEW);
   glPushMatrix();
diff --git a/src/Cockpit/panel.hxx b/src/Cockpit/panel.hxx
index 52bbf2e07..b46693b4a 100644
--- a/src/Cockpit/panel.hxx
+++ b/src/Cockpit/panel.hxx
@@ -133,6 +133,7 @@ public:
   virtual void bind ();
   virtual void unbind ();
   virtual void update ();
+  virtual void update (GLfloat winx, GLfloat winw, GLfloat winy, GLfloat winh);
 
 				// transfer pointer ownership!!!
   virtual void addInstrument (FGPanelInstrument * instrument);
diff --git a/src/Objects/newmat.cxx b/src/Objects/newmat.cxx
index 1e917524d..2fa702d61 100644
--- a/src/Objects/newmat.cxx
+++ b/src/Objects/newmat.cxx
@@ -200,6 +200,7 @@ void FGNewMat::dump_info () {
 FGNewMat::~FGNewMat ( void ) {
 }
 
+
 istream&
 operator >> ( istream& in, FGNewMat& m )
 {