penetrate(6)                  XScreenSaver manual                 penetrate(6)

NAME
       penetrate - simulates a classic arcade shooting game

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

DESCRIPTION
       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.

OPTIONS
       --display host:display.screen
               Specifies which X display we should use.

       --root  Draw on the root window.

       --window-id number
               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.

       --visual visual
               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.

       --foreground color
               Specifies the default foreground color.

       --background color
               Specifies the default background color.

       --bgrowth integer
               Specifies the growth rate of the bomb explosions.

       --lrate integer
               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.

BUGS
       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.

ENVIRONMENT
       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.

SEE ALSO
       X(1), xscreensaver(1)

COPYRIGHT
       Copyright (C) 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.

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

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