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+.de EX		\"Begin example
+.ne 5
+.if n .sp 1
+.if t .sp .5
+.nf
+.in +.5i
+..
+.de EE
+.fi
+.in -.5i
+.if n .sp 1
+.if t .sp .5
+..
+.TH XScreenSaver 1 "30-Oct-99" "X Version 11"
+.SH NAME
+xmatrix - simulates the computer displays from the movie
+.SH SYNOPSIS
+.B xmatrix
+[\-display \fIhost:display.screen\fP] [\-window] [\-root] [\-install]
+[\-visual \fIvisual\fP] 
+[\-delay \fIusecs\fP] 
+[\-density \fIpercentage\fP]
+[\-top | \-bottom | \-both]
+[\-small | \-large]
+[\-trace]
+[\-mode \fImode\fP]
+[\-phone \fInumber\fP]
+[\-fps]
+.SH DESCRIPTION
+The \fIxmatrix\fP program draws the 2D "digital rain" effect, as seen on
+the computer monitors in the Wachowski brothers' film, "The Matrix".
+
+Also see
+.BR glmatrix (MANSUFFIX)
+for a 3D rendering of the similar effect that appeared in the title
+sequence of the movie.
+.SH OPTIONS
+.I xmatrix
+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\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 \-delay \fIusecs\fP
+The delay between steps of the animation, in microseconds: default 10000.
+.TP 8
+.B \-density \fIpercentage\fP
+The approximate percentage of the screen that should be filled with 
+characters at any given time.  Default 75%.
+
+When running in a window, typing \fB+\fP will increase the density and 
+typing \fB-\fP will decrease it.  Typing \fB0\fP will momentarily
+drain the screen.
+.TP 8
+.B \-top\fP | \fB\-bottom\fP | \fB\-both
+If \fB\-top\fP is specified, the characters will only drop in from the
+top of the screen as sliding columns of characters.  If \fB\-bottom\fP
+is specified, then instead of sliding columns, the characters will appear
+as columns that grow downwards and are erased from above.  If \fB\-both\fP
+is specified, then a mixture of both styles will be used.  The default
+is \fB\-both\fP.
+
+When running in a window, typing \fB[\fP will switch to top-mode, 
+typing \fB\]\fP will switch to bottom-mode, and typing \fB\\\fP will
+switch to both-mode.
+.TP 8
+.B \-small\fP | \fB\-large
+These options specify the sizes of the characters.  The default
+is \fB\-large\fP.
+.TP 8
+.B \-mode trace
+Start off with a representation of a phone number being traced.  
+When the number is finally found, display The Matrix as usual.
+This is the default.
+.TP 8
+.B \-phone\fP \fInumber\fP
+The phone number to trace, if \fB\-trace\fP is specified.
+.TP 8
+.B \-mode crack
+Start off by shutting down the power grid.
+.TP 8
+.B \-mode binary
+Instead of displaying Matrix glyphs, only display ones and zeros.
+.TP 8
+.B \-mode hexadecimal
+Instead of displaying Matrix glyphs, display hexadecimal digits.
+.TP 8
+.B \-mode dna
+Instead of displaying Matrix glyphs, display genetic code
+(guanine, adenine, thymine, and cytosine.)
+.TP 8
+.B \-mode ascii
+Instead of displaying Matrix glyphs, display random ASCII characters.
+.TP 8
+.B \-mode pipe
+Instead of displaying random characters, display the output of a subprocess,
+as ASCII.
+.TP 8
+.B \-program \fIsh-command\fP
+The command to run to generate the text to display.  This option may
+be any string acceptable to /bin/sh.  The program will be run at the
+end of a pty or pipe, and any characters that it prints to
+\fIstdout\fP will be placed in the feeders for xmatrix. If the program
+exits, it will be launched again after xmatrix has processed all the
+text it produced.
+
+For example:
+.EX
+xmatrix -program 'echo Hello World'
+xmatrix -ascii -program 'ps -eo comm | rev'
+xmatrix -program 'od -txC -w6 /dev/random'
+xmatrix -program 'cat /dev/random'
+.EE
+.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 glmatrix (MANSUFFIX),
+.BR X (1),
+.BR xscreensaver (1)
+.SH COPYRIGHT
+Copyright \(co 1999-2018 by Jamie Zawinski.  Permission to use, copy, modify, 
+distribute, and sell this software and its documentation for any purpose is 
+hereby granted without fee, provided that the above copyright notice appear 
+in all copies and that both that copyright notice and this permission notice
+appear in supporting documentation.  No representations are made about the 
+suitability of this software for any purpose.  It is provided "as is" without
+express or implied warranty.
+.SH AUTHOR
+Jamie Zawinski <jwz@jwz.org>, 25-Apr-99.