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        fluidballs - the physics of bouncing balls.


        fluidballs  [-display  host:display.screen]  [-visual visual] [-window]
        [-root] [-count number] [-size number] [-gravity number] [-wind number]
        [-elasticity number] [-delay number] [-nonrandom] [-no-shake] [-fps]


        Models  the  physics  of  bouncing  balls,  or of particles in a gas or
        fluid, depending on the settings. If  "Shake  Box"  is  selected,  then
        every  now  and then, the box will be rotated, changing which direction
        is down (in order to keep the settled balls in motion.)


        -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
        -window Draw on a newly-created window.  This is the default.
        -root   Draw on the root window.
        -count number
                How many balls to display.  Default: 300.
        -size number
                Maximum size of each ball.  Default: 25.
        -gravity number
                Coefficient of gravity.  Useful values  are  <  0.1.   Default:
        -wind number
                Wind.  Useful values are < 0.1.  Default: 0.00.
        -elasticity number
                Coefficient  of  elasticity.   Useful  values  are  0.2 to 1.0.
                Default: 0.97.  Lower numbers make less bouncy balls.
        -delay number
                Per-frame delay, in microseconds.  Default:  10000  (0.01  sec-
                Make all balls be the same size.
                Make the balls be random sizes.  Default.
        -shake | -no-shake
                Whether  to  shake  the box if the system seems to have settled
                down.  "Shake" means "change the direction of Down."
        -fps    Display the current frame rate and CPU load.


        DISPLAY to get the default host and display number.
                to get the name of a resource file that  overrides  the  global
                resources stored in the RESOURCE_MANAGER property.
        X(1), xscreensaver(1)


        Copyright  (C) 2002 by Peter Birtles and Jamie Zawinski.  Permission to
        use, copy, modify, distribute, and sell this software and its  documen-
        tation for any purpose is hereby granted without fee, provided that the
        above copyright notice appear in all copies and that  both  that  copy-
        right notice and this permission notice appear in supporting documenta-
        tion.  No representations are made about the suitability of this  soft-
        ware  for  any  purpose.   It  is  provided  "as is" without express or
        implied warranty.


        Peter Birtles, Jamie Zawinski, and Steven Barker.