rdbomb(6) XScreenSaver manual rdbomb(6)

NAME

rd-bomb - reaction/diffusion textures

SYNOPSIS

rd-bomb [--display host:display.screen] [--foreground color]
[--background color] [--window] [--root] [--window-id
number][--install] [--visual visual] [--width n] [--height n]
[--reaction n] [--diffusion n] [--size f] [--speed f] [--delay
millisecs] [--fps]

DESCRIPTION

The rd-bomb program draws reaction/diffusion textures.

OPTIONS

If one of the reaction, diffusion, radius, and palette options is set
to a negative value, then that option will be set to a random
appropriate value.

Be sure to try "-speed 1 -size 0.1 -epoch 3000".

rd-bomb accepts the following options:

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

--root Draw on the root window.

--window-id number
Draw on the specified window.

--install
Install a private colormap for the window.

--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.

--width n

--height n
Specify the size of the tile, in pixels.

--reaction n

--diffusion n
These are constants in the equations that effect its visual
nature. Each may be one of 0, 1, or 2. Default is -1: these
constants are chosen randomly.

--radius n
Size of the seed.

--size f
What fraction of the window is actively drawn, a floating
point number between 0 (exclusive) and 1 (inclusive).
Default is 1.0.

--speed f
When a fraction of the screen is active, the active area
moves at this rate (a floating point number). Default is
zero. Suggested value: 1.0.

--delay millisecs
How many milliseconds to delay between frames; default 1, or
about 1/1000th of a second.

--fps Display the current frame rate and CPU load.

HISTORY

The code is derived from the 'd' mode of the "Bomb" visual musical
instrument, also by Scott Draves. The equations come from Xmorphia,
which is based on a version of the Gray-Scott model taken from:

John E. Pearson "Complex Patterns in a Simple System"
Science, 261,189, 9 July 1993.

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.

XSCREENSAVER_WINDOW
The window ID to use with --root.

SEE ALSO

X(1), xscreensaver(1),
https://scottdraves.com/bomb.html
https://web.archive.org/web/19981206145216/http%3A//www.ccsf.caltech.edu/ismap/image.html

COPYRIGHT

Copyright (C) 1997 by Scott Draves.

Permission to use, copy, modify, and distribute this software and its
documentation for any purpose and without fee is hereby granted,
provided that the above copyright notice appear in all copies and
that both that copyright notice and this permission notice appear in
supporting documentation.

AUTHOR

Scott Draves <spot@cs.cmu.edu>, Sep 1997

X Version 11 6.09 (07-Jun-2024) rdbomb(6)