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rd-bomb(6)		      XScreenSaver manual		    rd-bomb(6)

       rd-bomb - reaction/diffusion textures

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

       The rd-bomb program draws reaction/diffusion textures.  The code	is de-
       rived  from  the	 'd' mode of the "bomb"	visual musical instrument (see	I got the equations from xmor-
       phia  (, 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.

       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 appropri-
       ate value.

       Be sure to try "-speed 1	-size 0.1 -epoch 3000".

       rd-bomb accepts the following options:

       -window Draw on a newly-created window.	This is	the default.

       -root   Draw on the root	window.

	       Install a private colormap for the window.

       -visual visual
	       Specify	which  visual  to use.	Legal values are the name of a
	       visual class, or	the id number (decimal or hex) of  a  specific

       -width n

       -height n
	       Specify the size	of the tile, in	pixels.

       -reaction n

       -diffusion n
	       These are constants in the equations that effect	its visual na-
	       ture.  Each may be one of 0, 1, or 2. Default is	-1: these con-
	       stants are chosen randomly.

       -radius n
	       Size of the seed.

       -size f What fraction of	the window is actively drawn, a	floating point
	       number between 0	(exclusive) and	 1  (inclusive).   Default  is

       -speed f
	       When  a fraction	of the screen is active, the active area moves
	       at this rate (a floating	point number).	Default	is zero.  Sug-
	       gested value: 1.0.

       -delay millisecs
	       How  many  milliseconds	to delay between frames; default 1, or
	       about 1/1000th of a second.

       -fps    Display the current frame rate and CPU load.

       DISPLAY to get the default host and display number.

	       to get the name of a resource file that	overrides  the	global
	       resources stored	in the RESOURCE_MANAGER	property.

       X(1), xscreensaver(1), xlock(1)

       Copyright (C) 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,  pro-
       vided  that  the	 above	copyright notice appear	in all copies and that
       both that copyright notice and this permission notice  appear  in  sup-
       porting documentation.

       Scott Draves <>, 9/97

X Version 11		      5.44 (20-Mar-2020)		    rd-bomb(6)


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