1 .TH XScreenSaver 1 "10-May-97" "X Version 11"
3 rd-bomb - reaction/diffusion textures
6 [\-display \fIhost:display.screen\fP] [\-foreground \fIcolor\fP]
7 [\-background \fIcolor\fP] [\-window] [\-root] [\-install]
8 [\-visual \fIvisual\fP] [\-width \fIn\fP] [\-height \fIn\fP]
9 [\-reaction \fIn\fP] [\-diffusion \fIn\fP]
10 [\-size \fIf\fP] [\-speed \fIf\fP] [\-delay \fImillisecs\fP]
14 The \fIrd-bomb\fP program draws reaction/diffusion textures. The code
15 is derived from the 'd' mode of the "bomb" visual musical instrument
16 (see http://www.cs.cmu.edu/~spot/bomb.html). I got the equations from
17 xmorphia (http://www.ccsf.caltech.edu/ismap/image.html), which is
18 based on a version of the Gray-Scott model taken from:
19 John E. Pearson "Complex Patterns in a Simple System"
20 Science, 261,189, 9 July 1993.
22 If the frame-rate is too low, consider decreasing the width and height
23 of the tile, or decreasing the size of the active part of the screen.
27 If one of the reaction, diffusion, radius, and palette options is set
28 to a negative value, then that option will be set to a random
31 Be sure to try "-speed 1 -size 0.1 -epoch 3000".
34 accepts the following options:
37 Draw on a newly-created window. This is the default.
40 Draw on the root window.
43 Install a private colormap for the window.
45 .B \-visual \fIvisual\fP
46 Specify which visual to use. Legal values are the name of a visual class,
47 or the id number (decimal or hex) of a specific visual.
52 Specify the size of the tile, in pixels.
56 .B \-diffusion \fIn\fP
57 These are constants in the equations that effect its visual nature.
58 Each may be one of 0, 1, or 2. Default is -1: these constants are
65 What fraction of the window is actively drawn, a floating point number
66 between 0 (exclusive) and 1 (inclusive). Default is 1.0.
69 When a fraction of the screen is active, the active area moves at this
70 rate (a floating point number). Default is zero. Suggested value: 1.0.
72 .B \-delay \fImillisecs\fP
73 How many milliseconds to delay between frames; default 1, or
74 about 1/1000th of a second.
77 Display the current frame rate and CPU load.
82 to get the default host and display number.
85 to get the name of a resource file that overrides the global resources
86 stored in the RESOURCE_MANAGER property.
92 Copyright \(co 1997 by Scott Draves.
94 Permission to use, copy, modify, and distribute this software and its
95 documentation for any purpose and without fee is hereby granted,
96 provided that the above copyright notice appear in all copies and that
97 both that copyright notice and this permission notice appear in
98 supporting documentation.
100 Scott Draves <spot@cs.cmu.edu>, 9/97