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        penetrate - simulates a classic arcade shooting game


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


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


        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.
        See for details.


        Copyright  (C) 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.