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fluidballs

Section: XScreenSaver manual (6)
Updated: 5.04 (13-Nov-2007)
Index Return to Main Contents
 

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 | -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_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.


 

Index

NAME
SYNOPSIS
DESCRIPTION
OPTIONS
ENVIRONMENT
SEE ALSO
COPYRIGHT
AUTHOR




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