penetrate - simulates a classic arcade shooting game

       Adam Miller <adum@aya.yale.edu>, 1999.

X Version 11                                   6.08 (10-Oct-2023)                                  penetrate(6x)

       The  layout  of  the screen isn't quite the same as the game this program tries to emulate.  In this this
       program, the missiles come out of the cities; when really, there are supposed to be three  missile  bases
       on hills, with the cities in the valleys between them.

       Copyright © 1999 Adam Miller.  Permission to use, copy, modify, distribute, and sell  this  software  and
       its documentation for any purpose is hereby granted without fee, provided that the above copyright notice
       appear  in all copies and that both that copyright notice and this permission notice appear in supporting
       documentation.  No representations are made about the suitability of this software for any  purpose.   It
       is provided "as is" without express or implied warranty.

Penetrate simulates the arcade classic with the cities and the stuff  shooting  down  from  the  sky  and
       stuff.   The  computer  plays  against  itself,  desperately  defending  the forces of good against those
       thingies raining down.  Bonus cities are awarded at ever-increasing intervals.  Every five levels appears
       a bonus round.  The computer player gets progressively more intelligent as the game  progresses.   Better
       aim,  more  economical  with ammo, and better target selection.  Points are in the bottom right, and high
       score is in the bottom left.  Start with -smart to have the computer player skip the learning process.

DISPLAY to get the default host and display number.

       XENVIRONMENT
               to  get  the  name  of  a  resource  file  that  overrides  the  global  resources  stored in the
               RESOURCE_MANAGER property.

       XSCREENSAVER_WINDOW
               The window ID to use with --root.

       penetrate - simulates a classic arcade shooting game

--displayhost:display.screen
               Specifies which X display we should use.

       --root  Draw on the root window.

       --window-idnumber
               Draw on the specified window.

       --window
               Draw on a newly-created window.  This is the default.

       --install
               Install a private colormap for the window.

       --noinstall
               Don't install a private colormap for the window.

       --visualvisual
               Specify which visual to use.  Legal values are the name of a  visual  class,  or  the  id  number
               (decimal or hex) of a specific visual.  Possible choices include

               default,   best,  mono,  monochrome,  gray,  grey,  color,  staticgray,  staticcolor,  truecolor,
               grayscale, greyscale, pseudocolor, directcolor, number

               If a decimal or hexadecimal number  is  used,  XGetVisualInfo(3X)  is  consulted  to  obtain  the
               required visual.

       --foregroundcolor
               Specifies the default foreground color.

       --backgroundcolor
               Specifies the default background color.

       --bgrowthinteger
               Specifies the growth rate of the bomb explosions.

       --lrateinteger
               Set the initial rate of laser fire.

       -smart  Have the computer player skip the learning process.

       --fps   Display the current frame rate and CPU load.

X(1), xscreensaver(1)

penetrate   [--display   host:display.screen]   [--root]   [--window]  [--window-id  number]  [--install]
       [--noinstall] [--visual visual] [--bgrowth microseconds] [--lrate number] [--smart number] [--fps]