XScreenSaver(1)                                                XScreenSaver(1)


       penetrate - simulates a classic arcade shooting game


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


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

       -root   Draw on the root window.

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

               Install a private colormap for the window.

               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.


       The layout of the screen isn’t quite the same as the game this  program
       tries  to  emulate.   In this this program, the missles 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.

       See for details.


       Copyright  ©  1999  Adam Miller.  Permission to use, copy, modify, dis-
       tribute, 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  per-
       mission  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.


       Adam Miller <>, 1999.

X Version 11                       18-Jun-01                   XScreenSaver(1)

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