ftp://ftp.sunet.se/pub/vendor/sco/skunkware/osr5/x11/savers/xscreensaver/xscreensaver...

[xscreensaver] / local / man / man.1 / rd-bomb.1

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+.TH XScreenSaver 1 "10-May-97" "X Version 11"
+.SH NAME
+rd-bomb - reaction/diffusion textures
+.SH SYNOPSIS
+.B rd-bomb
+[\-display \fIhost:display.screen\fP] [\-foreground \fIcolor\fP]
+[\-background \fIcolor\fP] [\-window] [\-root] [\-install]
+[\-visual \fIvisual\fP] [\-width \fIn\fP] [\-height \fIn\fP]
+[\-reaction \fIn\fP] [\-diffusion \fIn\fP]
+[\-size \fIf\fP] [\-speed \fIf\fP] [\-delay \fIusecs\fP]
+.SH DESCRIPTION
+
+The \fIrd-bomb\fP program draws reaction/diffusion textures.  The code
+is derived from the 'd' mode of the "bomb" visual musical instrument
+(see http://www.cs.cmu.edu/~spot/bomb.html).  I got the equations from
+xmorphia (http://www.ccsf.caltech.edu/ismap/image.html), 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.
+
+.SH OPTIONS
+
+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".
+
+.I rd-bomb
+accepts the following options:
+.TP 8
+.B \-window
+Draw on a newly-created window.  This is the default.
+.TP 8
+.B \-root
+Draw on the root window.
+.TP 8
+.B \-install
+Install a private colormap for the window.
+.TP 8
+.B \-visual \fIvisual\fP
+Specify which visual to use.  Legal values are the name of a visual class,
+or the id number (decimal or hex) of a specific visual.
+.TP 8
+.B \-width \fIn\fP
+.TP 8
+.B \-height \fIn\fP
+Specify the size of the tile, in pixels.
+.TP 8
+.B \-reaction \fIn\fP
+.TP 8
+.B \-diffusion \fIn\fP
+These are constants in the equations that effect its visual nature.
+Each may be one of 0, 1, or 2.  
+.TP 8
+.B \-radius \fIn\fP
+Size of the seed.
+.TP 8
+.B \-palette \fIn\fP
+Selects a palette.  Must be between 0 and 80, inclusive.
+.TP 8
+.B \-size \fIf\fP
+What fraction of the window is actively drawn, a floating point number
+between 0 (exclusive) and 1 (inclusive).  Default is 0.66.
+.TP 8
+.B \-speed \fIf\fP
+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.
+.TP 8
+.B \-delay \fIusecs\fP
+How many microseconds to delay between frames; default 1000, or 
+about 1/1000th of a second.
+.SH ENVIRONMENT
+.PP
+.TP 8
+.B DISPLAY
+to get the default host and display number.
+.TP 8
+.B XENVIRONMENT
+to get the name of a resource file that overrides the global resources
+stored in the RESOURCE_MANAGER property.
+.SH SEE ALSO
+.BR X (1),
+.BR xscreensaver (1),
+.BR xlock (1)
+.SH COPYRIGHT
+Copyright \(co 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. 
+.SH AUTHOR
+Scott Draves <spot@cs.cmu.edu>, 9/97