Helpfile:
---------
The following options are allowed:

   [-blocks n]
        Specifies the number of blocks.
   [-delay n]
        Specifies a delay;  0 <= n <= 10
   [-tanks n]
        Specifies the number of tanks.
   [-missiles n]
        Specifies the number of missiles.
   [-salvos n]
        Specifies the number of salvos that the player receives.
        The default is the maximum of ntanks or nmissiles.
   [-landers n]
        Specifies the number of landers.
   [-original]
        Sets defaults to the original arcade version.  This option
        overrides all options other than [-quiet] [-delay n].
   [-scores]
        Prints out the scores.
   [-version]
        Prints out the version.
   [-coptersonly]
        A practice mode involving only helicopters.
   [-nooutput]
        Game will generally not produce text output to a tty.  Useful
        when running the game from a menu.
   [-quiet]
        Do not ring the bell during the game.
   [-cursor]
        A cursor is provided.  Typically only useful if extreme pointer
        motion will take you out of the window.  This circumstance can
        occur w/ multiple displays or virtual root windows.  Newer
        versions of the game will attempt to confine the cursor to the
        game window.
   [-mono]
        Run the game in mono, even on a color screen.  This option really
        runs the game in white on black.  There are methods for running
        two-tone games w/ various bg's and fg's....see XResources below.
   [-defaultcolormap]
        On color displays, use the default color map.  The game will
        still try to use as many colors as possible, but will not
        allocate a private colormap to do so.
   [-nofullscreen]
        Run the game in a window just large enough to play in.   This
        option works well under some conditions, such as playing in mono
        or when using the default color map.  Otherwise, when using a
        private colormap, the border tends to change to some unintended
        color (probably yellow).
   [-help]
        Prints this message.

  Keyboard commands:
  'p' - pause
  'c' - continue
  'i' - pause and iconify (also spacebar)
        Only under R4 or later. Window managers are free to ignore this.
  'q' - quit (also ^C, also 1st and 3rd button down simultaneously)
  'r' - redraw

General Information
-------------------
  Cbzone is a version of Battlezone derived from the Fortran
sources written by Justin S. Revenaugh.  This version is more
flexible in that the number of opponents is user selectable.

  Input to the the game is primarily through the mouse, although
some keyboard commands are accepted.  Mouse left button will
fire a salvo; mouse right button will switch between low/high
sensitivity (sensitivity determines how sensitive the joystick is to
pointer motion).  On a three button mouse, the middle button will
center the joystick and stop your tank.  This facility can be done
ona two button mouse by hitting both buttons at the same time.
Directional control of the tank is by moving the mouse to
different portions of the screen.  The joystick in the lower right
hand of the screen will correspond to your tanks current movement
and rotation.

  Scores are only eligible for the high score list if they
are played with the default options with the exceptions that
the delay can be 0-5 and quiet mode can be on.

Options settable via XResources
-------------------------------
  The following resources can be modified to control the game.  These
changes can be made via xrdb or on the command line using "-xrm".

  The game class is "Cbzone".

  Resource              Resource                Resource
    name                subclass                Argument        Default
  --------              --------                --------        -------
  delay                 Delay                   int             5
  tanks                 Tanks                   int             2
  missiles              Missiles                int             1
  blocks                Blocks                  int             8
  landers               Landers                 int             4
  salvos                Salvos                  int             2
  coptersonly           Coptersonly             Bool            False
  quiet                 Quiet                   Bool            False
  scores                Scores                  Bool            False
  original              Original                Bool            False
  version               Version                 Bool            False
  help                  Help                    Bool            False
  output                Output                  Bool            True
  mono                  Mono                    Bool            False
  bgcolor               BgColor                 colorname       black
  fgcolor               FgColor                 colorname       skyblue
  textcolor             TextColor               colorname       red
  esalvocolor           SalvoColor              colorname       red
  psalvocolor           SalvoColor              colorname       skyblue
  joystickcolor         JoystickColor           colorname       red
  scannercolor          ScannerColor            colorname       green
  horizoncolor          HorizonColor            colorname       gray50
  mooncolor             MoonColor               colorname       gray50
  xhaircolor            XHairColor              colorname       gray50
  cursorcolor           CursorColor             colorname       skyblue
  crackcolor            CrackColor              colorname       skyblue
  tankcolor             EnemyColor              colorname       green
  supercolor            EnemyColor              colorname       green
  missilecolor          EnemyColor              colorname       green
  coptercolor           EnemyColor              colorname       green
  landercolor           LanderColor             colorname       green
  cubecolor             BlockColor              colorname       yellow
  pyramidcolor          BlockColor              colorname       yellow
  maxcolors             MaxColors               int             0 (all)
  fadingcolors          FadingColors            int             True
  cursor                Cursor                  Bool            False
  defaultcolormap       DefaultColormap         Bool            False
  fullscreen            Fullscreen              Bool            True
  reports               Reports                 Bool            False

Example Use of Resources
------------------------
In general, the following commands will do something useful only a
        color screen.

 % cbzone  -tanks 3 -xrm "*EnemyColor: magenta"
        this command would make all enemies (tanks, supertanks, missiles,
        and copters) magenta.  Additionally, there would be 3 tanks or
        supertanks in the game.

 % cbzone -xrm "*tankcolor: black" -xrm "*supercolor: black"
        this is stealth mode, assuming a black background.  All tanks
        and supertanks are black.  However, they will still show up
        on the scanner.

 % cbzone -xrm "*fadingcolors: 5"
        For the objects which fade (blocks, landers, or enemies), there
        will be this many shades of a particular color.  The default is
        as many as possible.
        For no fading colors, use -xrm "*fadingcolors: 1"

 % cbzone -xrm "*maxcolors: 20"
        Use only 20 colors.  The game would generally try to obtain as
        many colors as it can either from the default colormap or by making
        its own colormap.   If there are not enough color cells available,
        the game will reduce the number of different colors.  The steps
        taken to reduce the number of colors is to first try and reduce the
        number of fading colors; if this is not sufficient, the game
        then starts changing groups of objects to the same color.

 % cbzone -xrm "*maxcolors: 2" -xrm "*fgcolor: skyblue"
        This command would run the game w/ a black (default) background;
        everything else would be skyblue.

Environment variables
---------------------
  PAGER - which pager to use to read the message-of-the-day and the
          helpfile.

Bugs
----
  Tanks currently move through one another, consider it a
feature.  Anything else is probably really a bug and should
be reported.

Author
------
 Justin S Revenaugh, MIT,  wrote the original Fortran version.
 Todd W Mummert, mummert+@cs.cmu.edu, CMU, translated to C,
   added variable number of objects and greater color support.
