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 © 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