XScreenSaver(1)XScreenSaver(1)NAMErd-bomb - reaction/diffusion textures
SYNOPSISrd-bomb [-display host:display.screen] [-foreground color]
[-background color] [-window] [-root] [-install] [-visual
visual] [-width n] [-height n] [-reaction n] [-diffusion
n] [-size f] [-speed f] [-delay usecs]
DESCRIPTION
The rd-bomb program draws reaction/diffusion textures.
The code is derived from the 'd' mode of the "bomb" visual
musical instrument (see
http://www.cs.cmu.edu/~spot/bomb.html). I got the equa
tions from xmorphia (http://www.ccsf.cal
tech.edu/ismap/image.html), 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.
If the frame-rate is too low, consider decreasing the
width and height of the tile, or decreasing the size of
the active part of the screen.
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.
-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.
-radius n
Size of the seed.
-palette n
Selects a palette. Must be between 0 and 80,
inclusive.
-size f What fraction of the window is actively drawn, a
floating point number between 0 (exclusive) and 1
(inclusive). Default is 0.66.
-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 usecs
How many microseconds to delay between frames;
default 1000, or about 1/1000th of a second.
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 ALSOX(1), xscreensaver(1), xlock(1)COPYRIGHT
Copyright 1997 by Scott Draves.
Permission to use, copy, modify, and distribute this soft
ware 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>, 9/97
X Version 11 10-May-97 XScreenSaver(1)
