fluidballs - the physics of bouncing balls.

       Peter Birtles, Jamie Zawinski, and Steven Barker.

X Version 11                                   6.08 (10-Oct-2023)                                 fluidballs(6x)

       Copyright  ©  2002 by Peter Birtles and Jamie Zawinski.  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.

       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.)

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.

       fluidballs - the physics of bouncing balls.

--visualvisual
               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.

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

       --root  Draw on the root window.

       --window-idnumber
               Draw on the specified window.

       --countnumber
               How many balls to display.  Default: 300.

       --sizenumber
               Maximum size of each ball.  Default: 25.

       --gravitynumber
               Coefficient of gravity.  Useful values are < 0.1.  Default: 0.01.

       --windnumber
               Wind.  Useful values are < 0.1.  Default: 0.00.

       --elasticitynumber
               Coefficient of elasticity.  Useful values are 0.2 to 1.0.  Default:  0.97.   Lower  numbers  make
               less bouncy balls.

       --delaynumber
               Per-frame delay, in microseconds.  Default: 10000 (0.01 seconds.).

       --nonrandom
               Make all balls be the same size.

       --no-nonrandom
               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.

X(1), xscreensaver(1)

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