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+XScreenSaver(1) XScreenSaver(1)
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+
+N\bNA\bAM\bME\bE
+ munch - munching squares screen hack
+
+S\bSY\bYN\bNO\bOP\bPS\bSI\bIS\bS
+ m\bmu\bun\bnc\bch\bh [-display _\bh_\bo_\bs_\bt_\b:_\bd_\bi_\bs_\bp_\bl_\ba_\by_\b._\bs_\bc_\br_\be_\be_\bn] [-foreground _\bc_\bo_\bl_\bo_\br]
+ [-background _\bc_\bo_\bl_\bo_\br] [-window] [-root] [-mono] [-install]
+ [-visual _\bv_\bi_\bs_\bu_\ba_\bl] [-delay _\bs_\be_\bc_\bo_\bn_\bd_\bs] [-xor] [-noxor] [-shift]
+ [-noshift] [-logminwidth _\bm_\bi_\bn_\bi_\bm_\bu_\bm _\bw_\bi_\bd_\bt_\bh]
+
+D\bDE\bES\bSC\bCR\bRI\bIP\bPT\bTI\bIO\bON\bN
+ The _\bm_\bu_\bn_\bc_\bh program preforms the munching squares hack until
+ killed. It picks square size, position, and gravity ran-
+ domly; configurable options are listed below.
+
+ The munching squares hack cosists of drawing Y = X XOR T
+ for a range of X and T over and over until all the possi-
+ ble combinations of X and T have come up. It was report-
+ edly discovered by Jackson Wright in 1962 and took 5
+ instructions of PDP-6 code.
+
+O\bOP\bPT\bTI\bIO\bON\bNS\bS
+ _\bm_\bu_\bn_\bc_\bh accepts the following options:
+
+ -\b-w\bwi\bin\bnd\bdo\bow\bw Draw on a newly-created window. This is the
+ default.
+
+ -\b-r\bro\boo\bot\bt Draw on the root window.
+
+ -\b-m\bmo\bon\bno\bo If on a color display, pretend we're on a
+ monochrome display.
+
+ -\b-i\bin\bns\bst\bta\bal\bll\bl
+ Install a private colormap for the window.
+
+ -\b-v\bvi\bis\bsu\bua\bal\bl _\bv_\bi_\bs_\bu_\ba_\bl
+ 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.
+
+ -\b-d\bde\bel\bla\bay\by _\bs_\be_\bc_\bo_\bn_\bd_\bs
+ How long to wait before starting over. Default 5
+ seconds.
+
+ -\b-x\bxo\bor\br Use the XOR drawing function. (Default.)
+
+ -\b-n\bno\bo-\b-x\bxo\bor\br Don't use the XOR drawing function.
+
+ -\b-s\bsh\bhi\bif\bft\bt Start drawing the square at weird starting points.
+ (Default.)
+
+ -\b-n\bno\bo-\b-s\bsh\bhi\bif\bft\bt
+ Don't shift and start drawing the square at weird
+ starting points.
+
+
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+
+X Version 11 17-Jun-97 1
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+
+XScreenSaver(1) XScreenSaver(1)
+
+
+ -\b-l\blo\bog\bgm\bmi\bin\bnw\bwi\bid\bdt\bth\bh _\bm_\bi_\bn_\bi_\bm_\bu_\bm_\b-_\bw_\bi_\bd_\bt_\bh
+ 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.)
+
+E\bEN\bNV\bVI\bIR\bRO\bON\bNM\bME\bEN\bNT\bT
+ D\bDI\bIS\bSP\bPL\bLA\bAY\bY to get the default host and display number.
+
+ X\bXE\bEN\bNV\bVI\bIR\bRO\bON\bNM\bME\bEN\bNT\bT
+ to get the name of a resource file that overrides
+ the global resources stored in the RESOURCE_MAN-
+ AGER property.
+
+S\bSE\bEE\bE A\bAL\bLS\bSO\bO
+ X\bX(1), x\bxs\bsc\bcr\bre\bee\ben\bns\bsa\bav\bve\ber\br(1),
+ h\bht\btt\btp\bp:\b:/\b//\b/w\bww\bww\bw.\b.i\bin\bnw\bwa\bap\bp.\b.c\bco\bom\bm/\b/p\bpd\bdp\bp1\b10\b0/\b/h\bhb\bba\bak\bke\ber\br/\b/h\bha\bak\bkm\bme\bem\bm/\b/h\bha\bak\bkm\bme\bem\bm.\b.h\bht\btm\bml\bl,\b,
+ h\bht\btt\btp\bp:\b:/\b//\b/w\bww\bww\bw.\b.c\bco\bom\bme\bed\bdi\bia\ba.\b.c\bco\bom\bm/\b/H\bHo\bot\bt/\b/j\bja\bar\brg\bgo\bon\bn_\b_3\b3.\b.0\b0/\b/J\bJA\bAR\bRG\bGO\bON\bN_\b_M\bM/\b/M\bMU\bUN\bNC\bCH\bH-\b-
+ S\bSQ\bQR\bR.\b.H\bHT\bTM\bML\bL
+
+H\bHI\bIS\bST\bTO\bOR\bRY\bY
+ Quoted from HAKMEM, for historical interest. As that doc-
+ ument says, "Unless otherwise stated, all computer pro-
+ grams are in PDP-6/10 assembly language."
+
+ 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.
+
+
+ DATAI 2
+ ADDB 1,2
+ ROTC 2,-22
+ XOR 1,2
+ JRST .-4
+
+ 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, ...)
+
+ ITEM 147 (Schroeppel):
+ Munching squares is just views of the graph Y = X
+ XOR T for consecutive values of T = time.
+
+ 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 =
+
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+X Version 11 17-Jun-97 2
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+XScreenSaver(1) XScreenSaver(1)
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+ 4000,,4 1000,,2002 2000,,4 0,,1002
+
+ (Notation: <left half>,,<right half>)
+
+ Also try the FADR after the XOR, switches =
+ 1001,,1.
+
+C\bCO\bOP\bPY\bYR\bRI\bIG\bGH\bHT\bT
+ Copyright (C) 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.
+
+A\bAU\bUT\bTH\bHO\bOR\bR
+ Tim Showalter <tjs@andrew.cmu.edu>, 17-Jun-97, based on
+ what's in the Jargon File and stealing stuff from existing
+ xscreensaver modules.
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+X Version 11 17-Jun-97 3
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projects / xscreensaver / blobdiff