php/game-of-life/golife.php

   1 <?php
   2 //Game of life 0.3 (2D Cellular automata example implementation)
   3 //Coded: Harvie 2oo7
   4 /*
   5  *  The Rules (THX2John Conway):
   6  *    For a space that is 'populated':
   7  *      Each cell with one or no neighbors dies, as if by loneliness.
   8  *      Each cell with four or more neighbors dies, as if by overpopulation.
   9  *      Each cell with two or three neighbors survives.
  10  *    For a space that is 'empty' or 'unpopulated':
  11  *     Each cell with three neighbors becomes populated.
  12  *
  13  *  http://www.bitstorm.org/gameoflife/           -Online\offline java based version
  14  *  http://www.bitstorm.org/gameoflife/lexicon/   -Nice lexicon of lifes, that you can test on this simulator
  15  *
  16  *  $life contains array of strings, where every character is one cell
  17  *  there is also function to load life from file (for more lifes see lexicon)
  18  *  i included two lifes life.txt - simple small life and glider.txt - the most classical of all, it become symbol of hackership
  19  *
  20  *  for better experience please resize console window to size of life, that you are running.
  21  *
  22  *  PHP+AsciiART == Rox!!!
  23  */
  24
  25 ///FUNCTIONS////////////////////////////////////////////////////
  26
  27 //
  28 function life_load($file) {
  29   $life = file($file);
  30   foreach ($life as $lnum => $line) {
  31     $life[$lnum] = trim($line);
  32   }
  33   return $life;
  34 }
  35
  36 //
  37 function life_randomize($lines, $chars) {
  38   $pop = $GLOBALS["populated"];
  39   $unp = $GLOBALS["unpopulated"];
  40   $life = "";
  41   $i = 0;
  42   while($lines > $i) {
  43     $line = "";
  44     $ichars = $chars;
  45     while($ichars > 0) {
  46       $line = $line.rand(0,1);
  47       $ichars--;
  48     }
  49     $line = str_replace("0", $unp, $line);
  50     $line = str_replace("1", $pop, $line);
  51     $life[$i] = $line;
  52     $i++;
  53   }
  54   return $life;
  55 }
  56
  57 //
  58 function life_print($life) {
  59   foreach($life as $line) {
  60       $line = str_replace($GLOBALS["populated"], $GLOBALS["prpop"], $line);
  61       $line = str_replace($GLOBALS["unpopulated"], $GLOBALS["prunp"], $line);
  62       echo($line."|\r\n");
  63   }
  64 }
  65
  66 //
  67 function life_neighs($life, $line, $char) {
  68   @$neighs = "";
  69   @$neighs = $neighs.$life[$line][$char+1];
  70   @$neighs = $neighs.$life[$line][$char-1];
  71   @$neighs = $neighs.$life[$line+1][$char+1];
  72   @$neighs = $neighs.$life[$line+1][$char-1];
  73   @$neighs = $neighs.$life[$line+1][$char];
  74   @$neighs = $neighs.$life[$line-1][$char+1];
  75   @$neighs = $neighs.$life[$line-1][$char-1];
  76   @$neighs = $neighs.$life[$line-1][$char];
  77   return $neighs;
  78 }
  79
  80 //
  81 function life_neighs_num($life, $line, $char) {
  82   $neighs = life_neighs($life, $line, $char);
  83   $neighs = ereg_replace("(\.| |0|_|-)", "", $neighs); //Unpopulated chars: . 0_-
  84   $neighs = strlen($neighs);
  85   //echo($neighs); //Debug
  86   return $neighs;
  87 }
  88
  89 //
  90 function life_next($life) {
  91
  92   $pop = $GLOBALS["populated"];
  93   $unp = $GLOBALS["unpopulated"];
  94   $old_life = $life;
  95
  96   foreach($life as $lnum => $line) {
  97     //echo($lnum); //Debug
  98     for($i = 0;$i < strlen($line);$i++) {
  99       $neigh_num =  0;
 100       $neigh_num = life_neighs_num($old_life, $lnum, $i);
 101       //echo($lnum."-".$i."=".$neigh_num."\n"); //Debug
 102       if($old_life[$lnum][$i] == $pop) {
 103           if($neigh_num == 2 || $neigh_num == 3) { $life[$lnum][$i] = $pop; } else { $life[$lnum][$i] = $unp; }
 104         }
 105       else
 106         {
 107           if($neigh_num == 3) { $life[$lnum][$i] = $pop; }
 108         }
 109     }
 110   }
 111   return $life;
 112
 113 }
 114
 115 //
 116 function cls() {
 117   //Clear screen
 118   for($i = 0; $i < 20;$i++) echo("\r\n");
 119 }
 120
 121 ///CODE///////////////////////////////////////////////////////////////////////////////
 122
 123 //Settings
 124 $life = life_load("spacefiller.cells"); //Load life
 125 //$life = life_randomize(30, 60); //Randomize life
 126 $populated = "#"; //File format populated
 127 $unpopulated = "."; //File format unpopulated
 128 $prpop = "Û"; //chr(219); //Print chars populated
 129 $prunp = " "; //Print chars unpopulated
 130 $sleep = 1; //sleep in seconds
 131 $usleep = 200000; //sleep in microseconds
 132
 133 /*
 134 $i = 0;
 135 while($i < 220) { echo($i."-".chr($i)."\n"); $i++; }
 136 */
 137
 138 //Run
 139 $backup_life = $life;
 140 $old_life = "";
 141 $generation = 1;
 142 while($old_life != $life) { //While moving
 143   $old_life = $life;
 144   echo("Generation: ".$generation."\r\n");
 145   life_print($life);
 146     //cls(); //Shifting
 147   $life = life_next($life);
 148   //sleep($sleep);
 149   //usleep($usleep);
 150   $generation++;
 151 }
 152
 153
 154 ?>