git.hungrycats.org Git - xscreensaver/blob - local/man/cat.1/munch.1

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   4 XScreenSaver(1)                                   XScreenSaver(1)
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   7 N\bNA\bAM\bME\bE
   8        munch - munching squares screen hack
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  10 S\bSY\bYN\bNO\bOP\bPS\bSI\bIS\bS
  11        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]
  12        [-background _\bc_\bo_\bl_\bo_\br] [-window] [-root]  [-mono]  [-install]
  13        [-visual _\bv_\bi_\bs_\bu_\ba_\bl] [-delay _\bs_\be_\bc_\bo_\bn_\bd_\bs] [-xor] [-noxor] [-shift]
  14        [-noshift] [-logminwidth _\bm_\bi_\bn_\bi_\bm_\bu_\bm _\bw_\bi_\bd_\bt_\bh]
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  16 D\bDE\bES\bSC\bCR\bRI\bIP\bPT\bTI\bIO\bON\bN
  17        The _\bm_\bu_\bn_\bc_\bh program preforms the munching squares hack until
  18        killed.   It picks square size, position, and gravity ran-
  19        domly; configurable options are listed below.
  20
  21        The munching squares hack cosists of drawing Y = X  XOR  T
  22        for  a range of X and T over and over until all the possi-
  23        ble combinations of X and T have come up.  It was  report-
  24        edly  discovered  by  Jackson  Wright  in  1962 and took 5
  25        instructions of PDP-6 code.
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  27 O\bOP\bPT\bTI\bIO\bON\bNS\bS
  28        _\bm_\bu_\bn_\bc_\bh accepts the following options:
  29
  30        -\b-w\bwi\bin\bnd\bdo\bow\bw Draw on  a  newly-created  window.   This  is  the
  31                default.
  32
  33        -\b-r\bro\boo\bot\bt   Draw on the root window.
  34
  35        -\b-m\bmo\bon\bno\bo   If   on  a  color  display,  pretend  we're  on  a
  36                monochrome display.
  37
  38        -\b-i\bin\bns\bst\bta\bal\bll\bl
  39                Install a private colormap for the window.
  40
  41        -\b-v\bvi\bis\bsu\bua\bal\bl _\bv_\bi_\bs_\bu_\ba_\bl
  42                Specify which visual to use.  Legal values are the
  43                name  of a visual class, or the id number (decimal
  44                or hex) of a specific visual.
  45
  46        -\b-d\bde\bel\bla\bay\by _\bs_\be_\bc_\bo_\bn_\bd_\bs
  47                How long to wait before starting over.  Default  5
  48                seconds.
  49
  50        -\b-x\bxo\bor\br    Use the XOR drawing function.  (Default.)
  51
  52        -\b-n\bno\bo-\b-x\bxo\bor\br Don't use the XOR drawing function.
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  54        -\b-s\bsh\bhi\bif\bft\bt  Start drawing the square at weird starting points.
  55                (Default.)
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  57        -\b-n\bno\bo-\b-s\bsh\bhi\bif\bft\bt
  58                Don't shift and start drawing the square at  weird
  59                starting points.
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  64 X Version 11                17-Jun-97                           1
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  70 XScreenSaver(1)                                   XScreenSaver(1)
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  73        -\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
  74                The  logarithm  (base  2) of the minimum with of a
  75                square (must be a power of 2, or some parts of the
  76                square aren't.)
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  78 E\bEN\bNV\bVI\bIR\bRO\bON\bNM\bME\bEN\bNT\bT
  79        D\bDI\bIS\bSP\bPL\bLA\bAY\bY to get the default host and display number.
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  81        X\bXE\bEN\bNV\bVI\bIR\bRO\bON\bNM\bME\bEN\bNT\bT
  82                to  get the name of a resource file that overrides
  83                the global resources stored in  the  RESOURCE_MAN-
  84                AGER property.
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  86 S\bSE\bEE\bE A\bAL\bLS\bSO\bO
  87        X\bX(1),                                     x\bxs\bsc\bcr\bre\bee\ben\bns\bsa\bav\bve\ber\br(1),
  88        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,
  89        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-
  90        S\bSQ\bQR\bR.\b.H\bHT\bTM\bML\bL
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  92 H\bHI\bIS\bST\bTO\bOR\bRY\bY
  93        Quoted from HAKMEM, for historical interest.  As that doc-
  94        ument  says,  "Unless  otherwise stated, all computer pro-
  95        grams are in PDP-6/10 assembly language."
  96
  97        ITEM 146: MUNCHING SQUARES
  98                Another simple display program. It is thought that
  99                this  was  discovered by Jackson Wright on the RLE
 100                PDP-1 circa 1962.
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 103                         DATAI 2
 104                         ADDB 1,2
 105                         ROTC 2,-22
 106                         XOR 1,2
 107                         JRST .-4
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 109                2=X,  3=Y.  Try  things  like  1001002   in   data
 110                switches.  This  also does interesting things with
 111                operations other than  XOR,  and  rotations  other
 112                than  -22.  (Try  IOR; AND; TSC; FADR; FDV(!); ROT
 113                -14, -9, -20, ...)
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 115        ITEM 147 (Schroeppel):
 116                Munching squares is just views of the graph Y =  X
 117                XOR T for consecutive values of T = time.
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 119        ITEM 148 (Cohen, Beeler):
 120                A  modification  to munching squares which reveals
 121                them in frozen states through opening and  closing
 122                curtains: insert FADR 2,1 before the XOR. Try data
 123                switches =
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 139                         4000,,4    1000,,2002    2000,,4    0,,1002
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 141                (Notation: <left half>,,<right half>)
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 143                Also try  the  FADR  after  the  XOR,  switches  =
 144                1001,,1.
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 146 C\bCO\bOP\bPY\bYR\bRI\bIG\bGH\bHT\bT
 147        Copyright  (C)  1997 by Tim Showalter.  Permission to use,
 148        copy, modify, distribute, and sell this software  and  its
 149        documentation  for  any  purpose is hereby granted without
 150        fee, provided that the above copyright  notice  appear  in
 151        all  copies  and  that both that copyright notice and this
 152        permission notice appear in supporting documentation.   No
 153        representations  are  made  about  the suitability of this
 154        software for any purpose.  It is provided "as is"  without
 155        express or implied warranty.
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 157 A\bAU\bUT\bTH\bHO\bOR\bR
 158        Tim  Showalter  <tjs@andrew.cmu.edu>,  17-Jun-97, based on
 159        what's in the Jargon File and stealing stuff from existing
 160        xscreensaver modules.
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