Provided by: xscreensaver-data-extra_4.23-4ubuntu8_i386 bug


       rd-bomb - reaction/diffusion textures


       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


       The rd-bomb program draws reaction/diffusion  textures.   The  code  is
       derived  from the ’d’ mode of the "bomb" visual musical instrument (see   I  got  the  equations   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.

       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.


       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 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

       -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

       -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.


       DISPLAY to get the default host and display number.

               to  get  the  name of a resource file that overrides the global
               resources stored in the RESOURCE_MANAGER property.


       X(1), xscreensaver(1), xlock(1)


       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.


       Scott Draves <>, 9/97