xscreensaver(1)

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 num_
ber] [-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 | -no-fps

Whether to show a frames-per-second display at the
bottom of the screen.

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_MAN
AGER 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 pro
vided "as is" without express or implied warranty.

AUTHOR

Peter Birtles, Jamie Zawinski, and Steven Barker.

X Version 11 XScreenSaver(1)