1rdbomb(6x)                    XScreenSaver manual                   rdbomb(6x)
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NAME

6       rd-bomb - reaction/diffusion textures
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SYNOPSIS

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

15       The rd-bomb program draws reaction/diffusion textures.
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OPTIONS

18       If one of the reaction, diffusion, radius, and palette options  is  set
19       to a negative value, then that option will be set to a random appropri‐
20       ate value.
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22       Be sure to try "-speed 1 -size 0.1 -epoch 3000".
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24       rd-bomb accepts the following options:
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26       -window Draw on a newly-created window.  This is the default.
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28       -root   Draw on the root window.
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30       -install
31               Install a private colormap for the window.
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33       -visual visual
34               Specify which visual to use.  Legal values are the  name  of  a
35               visual  class,  or the id number (decimal or hex) of a specific
36               visual.
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38       -width n
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40       -height n
41               Specify the size of the tile, in pixels.
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43       -reaction n
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45       -diffusion n
46               These are constants in the equations that effect its visual na‐
47               ture.  Each may be one of 0, 1, or 2. Default is -1: these con‐
48               stants are chosen randomly.
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50       -radius n
51               Size of the seed.
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53       -size f What fraction of the window is actively drawn, a floating point
54               number  between  0  (exclusive)  and 1 (inclusive).  Default is
55               1.0.
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57       -speed f
58               When a fraction of the screen is active, the active area  moves
59               at this rate (a floating point number).  Default is zero.  Sug‐
60               gested value: 1.0.
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62       -delay millisecs
63               How many milliseconds to delay between frames;  default  1,  or
64               about 1/1000th of a second.
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66       -fps    Display the current frame rate and CPU load.
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HISTORY

69       The  code is derived from the 'd' mode of the "Bomb" visual musical in‐
70       strument, also by Scott Draves.   The  equations  come  from  Xmorphia,
71       which is based on a version of the Gray-Scott model taken from:
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73       John E. Pearson "Complex Patterns in a Simple System"
74       Science, 261,189, 9 July 1993.
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ENVIRONMENT

77       DISPLAY to get the default host and display number.
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79       XENVIRONMENT
80               to  get  the  name of a resource file that overrides the global
81               resources stored in the RESOURCE_MANAGER property.
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SEE ALSO

84       X(1), xscreensaver(1),
85       https://scottdraves.com/bomb.html
86       https://web.archive.org/web/19981206145216/http%3A//www.ccsf.cal‐
87       tech.edu/ismap/image.html
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90       Copyright © 1997 by Scott Draves.
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92       Permission  to  use, copy, modify, and distribute this software and its
93       documentation for any purpose and without fee is hereby  granted,  pro‐
94       vided  that  the  above  copyright notice appear in all copies and that
95       both that copyright notice and this permission notice  appear  in  sup‐
96       porting documentation.
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AUTHOR

99       Scott Draves <spot@cs.cmu.edu>, Sep 1997
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103X Version 11               6.04-1.fc36 (06-Jun-2022)                rdbomb(6x)
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