+++ /dev/null
-.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 "17-Jun-97" "X Version 11"
-.SH NAME
-munch - munching squares screen hack
-.SH SYNOPSIS
-.B munch
-[\-display \fIhost:display.screen\fP] [\-foreground \fIcolor\fP]
-[\-background \fIcolor\fP] [\-window] [\-root] [\-mono] [\-install]
-[\-visual \fIvisual\fP] [\-delay \fIseconds\fP] [\-xor] [\-noxor] [\-shift]
-[\-noshift] [\-logminwidth \fIminimum width\fP]
-.SH DESCRIPTION
-The
-.I munch
-program preforms the munching squares hack until killed. It picks square
-size, position, and gravity randomly; configurable options are listed
-below.
-.PP
-The munching squares hack cosists of drawing Y = X XOR T for a range of X
-and T over and over until all the possible combinations of X and T have
-come up. It was reportedly discovered by Jackson Wright in 1962 and took 5
-instructions of PDP-6 code.
-.SH OPTIONS
-.I munch
-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 \-mono
-If on a color display, pretend we're on a monochrome display.
-.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 \-delay \fIseconds\fP
-How long to wait before starting over. Default 5 seconds.
-.TP 8
-.B \-xor
-Use the XOR drawing function. (Default.)
-.TP 8
-.B \-no\-xor
-Don't use the XOR drawing function.
-.TP 8
-.B \-shift
-Start drawing the square at weird starting points. (Default.)
-.TP 8
-.B \-no\-shift
-Don't shift and start drawing the square at weird starting points.
-.TP 8
-.B \-logminwidth \fIminimum\-width\fP
-The logarithm (base 2) of the minimum with of a square (must be a power of
-2, or some parts of the square aren't.)
-.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 http://www.inwap.com/pdp10/hbaker/hakmem/hakmem.html,
-.BR http://www.comedia.com/Hot/jargon_3.0/JARGON_M/MUNCHSQR.HTML
-.SH HISTORY
-Quoted from HAKMEM, for historical interest. As that document says, "Unless
-otherwise stated, all computer programs are in PDP-6/10 assembly language."
-.TP 8
-ITEM 146: MUNCHING SQUARES
-Another simple display program. It is thought that this was discovered by
-Jackson Wright on the RLE PDP-1 circa 1962.
-
-.EX
- DATAI 2
- ADDB 1,2
- ROTC 2,-22
- XOR 1,2
- JRST .-4
-.EE
-.RS 8
-2=X, 3=Y. Try things like 1001002 in data switches. This also does
-interesting things with operations other than XOR, and rotations other
-than -22. (Try IOR; AND; TSC; FADR; FDV(!); ROT -14, -9, -20, ...)
-.RE
-.TP 8
-ITEM 147 (Schroeppel):
-Munching squares is just views of the graph Y = X XOR T for consecutive
-values of T = time.
-.TP 8
-ITEM 148 (Cohen, Beeler):
-A modification to munching squares which reveals them in frozen states
-through opening and closing curtains: insert FADR 2,1 before the XOR. Try
-data switches =
-
-.EX
- 4000,,4 1000,,2002 2000,,4 0,,1002
-.EE
-.RS 8
-(Notation: <left half>,,<right half>)
-
-Also try the FADR after the XOR, switches = 1001,,1.
-.SH COPYRIGHT
-Copyright \(co 1997 by Tim Showalter. 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
-Tim Showalter <tjs@andrew.cmu.edu>, 17-Jun-97, based on what's in the
-Jargon File and stealing stuff from existing xscreensaver modules.
projects / xscreensaver / blobdiff