-extern void fgPlatformGlutPositionWindow( int x, int y );
-extern void fgPlatformGlutPushWindow( void );
-extern void fgPlatformGlutPopWindow( void );
-extern void fgPlatformGlutFullScreen( SFG_Window *win );
-extern void fgPlatformGlutLeaveFullScreen( SFG_Window *win );
-extern void fgPlatformGlutFullScreenToggle( SFG_Window *win );