NAME

       rd-bomb - reaction/diffusion textures

SYNOPSIS

       rd-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 millisecs] [-fps]

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 equations from xmorphia (http://www.ccsf.caltech.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. 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.

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), xlock(1)

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>, 9/97