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       gl-117 - an OpenGL action flight simulator


       gl-117 [-dlevel -h -v]


       gl-117  is  an  OpenGL and SDL based action flight simulator written in
       ISO C++.  Enter the Eagle Squadron and succeed in  several  challanging
       missions  leading  though different landscapes.  Five predefined levels
       of video quality and an amount of  viewing  ranges  let  you  perfectly
       adjust  the  game to the performance of your system.  The game provides
       joystick and mouse support, sound effects, and music.


              Set the debug level to level in [0..5]. '0' means quiet and will
              avoid  any output, '1' will log fatal errors causing the program
              to crash on stderr, '2' will also print  exceptions  on  stderr,
              '3'   will   add  warnings  on  stdout,  '4'  prints  additional
              information (predefined) on  stdout,  and  '5'  gives  developer
              specific messages on stdout.

       -h     Print a short summary on stdout and then quit immediately.

       -v     Display  the version number of gl-117 and then quit immediately.


       gl-117 uses a predefined working directory ".gl-117" in the user's home
       directory  to load and store all savegame files and read the plain text
       configuration files "conf"  and  "conf.interface".   If  there  are  no
       config   files  available,  gl-117  will  create  them  using  standard
       settings. The contents of the files are quite self-explanatory.


       Please look at the gl-117 user  manual  (gl-117.pdf)  for  installation
       instructions and further gameplay related descriptions.


       gl-117 is distributed under the terms of the GPL.


       Thomas A. Drexl (

                               27 February 2003