1rd-bomb(6x) XScreenSaver manual rd-bomb(6x)
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6 rd-bomb - reaction/diffusion textures
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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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15 The rd-bomb program draws reaction/diffusion textures. The code is
16 derived from the 'd' mode of the "bomb" visual musical instrument (see
17 http://www.cs.cmu.edu/~spot/bomb.html). I got the equations from xmor‐
18 phia (http://www.ccsf.caltech.edu/ismap/image.html), which is based on
19 a version of the Gray-Scott model taken from:
20 John E. Pearson "Complex Patterns in a Simple System"
21 Science, 261,189, 9 July 1993.
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23 If the frame-rate is too low, consider decreasing the width and height
24 of the tile, or decreasing the size of the active part of the screen.
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28 If one of the reaction, diffusion, radius, and palette options is set
29 to a negative value, then that option will be set to a random appropri‐
30 ate value.
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32 Be sure to try "-speed 1 -size 0.1 -epoch 3000".
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34 rd-bomb accepts the following options:
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36 -window Draw on a newly-created window. This is the default.
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38 -root Draw on the root window.
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40 -install
41 Install a private colormap for the window.
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43 -visual visual
44 Specify which visual to use. Legal values are the name of a
45 visual class, or the id number (decimal or hex) of a specific
46 visual.
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48 -width n
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50 -height n
51 Specify the size of the tile, in pixels.
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53 -reaction n
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55 -diffusion n
56 These are constants in the equations that effect its visual
57 nature. Each may be one of 0, 1, or 2. Default is -1: these
58 constants are chosen randomly.
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60 -radius n
61 Size of the seed.
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63 -size f What fraction of the window is actively drawn, a floating point
64 number between 0 (exclusive) and 1 (inclusive). Default is
65 1.0.
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67 -speed f
68 When a fraction of the screen is active, the active area moves
69 at this rate (a floating point number). Default is zero. Sug‐
70 gested value: 1.0.
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72 -delay millisecs
73 How many milliseconds to delay between frames; default 1, or
74 about 1/1000th of a second.
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76 -fps Display the current frame rate and CPU load.
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79 DISPLAY to get the default host and display number.
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81 XENVIRONMENT
82 to get the name of a resource file that overrides the global
83 resources stored in the RESOURCE_MANAGER property.
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86 X(1), xscreensaver(1), xlock(1)
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89 Copyright © 1997 by Scott Draves.
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91 Permission to use, copy, modify, and distribute this software and its
92 documentation for any purpose and without fee is hereby granted, pro‐
93 vided that the above copyright notice appear in all copies and that
94 both that copyright notice and this permission notice appear in sup‐
95 porting documentation.
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98 Scott Draves <spot@cs.cmu.edu>, 9/97
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102X Version 11 5.44-2.fc32 (16-Apr-2020) rd-bomb(6x)