NAME

       fluidballs - the physics of bouncing balls.

SYNOPSIS

       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]

DESCRIPTION

       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.)

OPTIONS

       -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.

       -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: 0.01.

       -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 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.

ENVIRONMENT

       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.

SEE ALSO

       X(1), xscreensaver(1)

COPYRIGHT

       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.

AUTHOR

       Peter Birtles, Jamie Zawinski, and Steven Barker.