ftp://ftp.sunet.se/pub/vendor/sco/skunkware/osr5/x11/savers/xscreensaver/xscreensaver...
[xscreensaver] / local / man / cat.1 / penrose.1
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+XScreenSaver(1)                                   XScreenSaver(1)
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+N\bNA\bAM\bME\bE
+       penrose - draws quasiperiodic tilings
+
+S\bSY\bYN\bNO\bOP\bPS\bSI\bIS\bS
+       p\bpe\ben\bnr\bro\bos\bse\be [-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] [-ncolors _\bi_\bn_\bt_\be_\bg_\be_\br] [-delay _\bm_\bi_\bc_\br_\bo_\bs_\be_\bc_\bo_\bn_\bd_\bs]
+       [-redoDelay    _\bs_\be_\bc_\bo_\bn_\bd_\bs]    [-size    _\bi_\bn_\bt_\be_\bg_\be_\br]    [-ammann]
+       [-no-ammann]
+
+
+D\bDE\bES\bSC\bCR\bRI\bIP\bPT\bTI\bIO\bON\bN
+       The _\bp_\be_\bn_\br_\bo_\bs_\be program draws quasiperiodic tilings.
+
+       See  Onoda,  Steinhardt,  DiVincenzo  and Socolar in Phys.
+       Rev. Lett. 60, #25, 1988 or  Strandburg  in  Computers  in
+       Physics, Sep/Oct 1991.
+
+       This implementation uses the simpler version of the growth
+       algorithm, i.e., if there are no forced vertices,  a  ran-
+       domly chosen tile is added to a randomly chosen vertex (no
+       preference for those 108 degree angles).
+
+       There are two essential differences to the algorithm  pre-
+       sented  in  the  literature:  First,  we  do not allow the
+       tiling to enclose an untiled area.  Whenever  this  is  in
+       danger  of  happening, we just do not add the tile, hoping
+       for a better random choice the next  time.   Second,  when
+       choosing  a  vertex  randomly,  we will take one that lies
+       withing the viewport if available.  If this seems to cause
+       enclosures  in the forced rule case, we will allow invisi-
+       ble vertices to be chosen.
+
+       Tiling is restarted whenever one of the following happens:
+       there  are  no  incomplete vertices within the viewport or
+       the tiling has extended a window's length beyond the  edge
+       of  the  window  horizontally or vertically or forced rule
+       choice has failed 100 times due to areas about  to  become
+       enclosed.
+
+       Although  quasiperiodic  tilings  are  produced, the tiles
+       themselves are not penrose tiles  (darts  and  kites).  In
+       contrast  to penrose tiles, these tiles can be arranged to
+       form a periodic tiling.
+
+
+O\bOP\bPT\bTI\bIO\bON\bNS\bS
+       _\bp_\be_\bn_\br_\bo_\bs_\be 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.
+
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+
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+X Version 11                10-May-97                           1
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+XScreenSaver(1)                                   XScreenSaver(1)
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+       -\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-n\bnc\bco\bol\blo\bor\brs\bs _\bi_\bn_\bt_\be_\bg_\be_\br
+               How many colors  should  be  used  (if  possible).
+               Default 64.  The colors are chosen randomly.
+
+       -\b-s\bsi\biz\bze\be _\bi_\bn_\bt_\be_\bg_\be_\br
+               How big the tiles should be.  Default 40 pixels.
+
+
+       -\b-d\bde\bel\bla\bay\by _\bm_\bi_\bl_\bl_\bi_\bs_\be_\bc_\bo_\bn_\bd_\bs
+               How  long (in 1/1,000,000'ths of a second) to wait
+               between drawing each tile.  Default 10,000 or  .01
+               seconds.
+
+
+       -\b-r\bre\bed\bdo\boD\bDe\bel\bla\bay\by _\bs_\be_\bc_\bo_\bn_\bd_\bs
+               How long to wait between starting a completely new
+               tiling.  Default 3 seconds.
+
+
+       -\b-a\bam\bmm\bma\ban\bnn\bn _\bi_\bn_\bt_\be_\bg_\be_\br
+
+       -\b-n\bno\bo-\b-a\bam\bmm\bma\ban\bnn\bn _\bi_\bn_\bt_\be_\bg_\be_\br
+               Whether Ammann lines should be added.
+
+
+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), x\bxl\blo\boc\bck\bk(1)
+
+C\bCO\bOP\bPY\bYR\bRI\bIG\bGH\bHT\bT
+       Copyright (C) 1996 by Timo Korvola.
+
+       Permission to use, copy, modify, and distribute this soft-
+       ware and its documentation for any purpose and without fee
+       is hereby  granted,  provided  that  the  above  copyright
+       notice  appear  in all copies and that both that copyright
+
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+X Version 11                10-May-97                           2
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+XScreenSaver(1)                                   XScreenSaver(1)
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+       notice and this permission  notice  appear  in  supporting
+       documentation.
+
+A\bAU\bUT\bTH\bHO\bOR\bR
+       Timo Korvola <tkorvola@dopey.hut.fi>, 1996.
+
+       Ability  to  run  standalone or with _\bx_\bs_\bc_\br_\be_\be_\bn_\bs_\ba_\bv_\be_\br added by
+       Jamie Zawinski <jwz@jwz.org>, 10-May-97.
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+X Version 11                10-May-97                           3
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