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] [--back‐
10       ground  color]  [--window]  [--root]  [--window-id   number][--install]
11       [--visual  visual] [--width n] [--height n] [--reaction n] [--diffusion
12       n] [--size f] [--speed f] [--delay 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
27               Draw on a newly-created window.  This is the default.
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29       --root  Draw on the root window.
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31       --window-id number
32               Draw on the specified window.
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34       --install
35               Install a private colormap for the window.
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37       --visual visual
38               Specify which visual to use.  Legal values are the  name  of  a
39               visual  class,  or the id number (decimal or hex) of a specific
40               visual.
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42       --width n
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44       --height n
45               Specify the size of the tile, in pixels.
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47       --reaction n
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49       --diffusion n
50               These are constants in the equations that effect its visual na‐
51               ture.  Each may be one of 0, 1, or 2. Default is -1: these con‐
52               stants are chosen randomly.
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54       --radius n
55               Size of the seed.
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57       --size f
58               What fraction of the window is actively drawn, a floating point
59               number  between  0  (exclusive)  and 1 (inclusive).  Default is
60               1.0.
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62       --speed f
63               When a fraction of the screen is active, the active area  moves
64               at this rate (a floating point number).  Default is zero.  Sug‐
65               gested value: 1.0.
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67       --delay millisecs
68               How many milliseconds to delay between frames;  default  1,  or
69               about 1/1000th of a second.
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71       --fps   Display the current frame rate and CPU load.
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HISTORY

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

82       DISPLAY to get the default host and display number.
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84       XENVIRONMENT
85               to  get  the  name of a resource file that overrides the global
86               resources stored in the RESOURCE_MANAGER property.
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88       XSCREENSAVER_WINDOW
89               The window ID to use with --root.
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SEE ALSO

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

107       Scott Draves <spot@cs.cmu.edu>, Sep 1997
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