newstable.pl

   1 #!/usr/bin/perl
   2 use v5.14;
   3 use warnings;
   4
   5 my @diffs = (
   6         [-1,  0],
   7         [0 ,  1],
   8         [1 ,  0],
   9         [0 , -1],
  10         [-1, -1],
  11         [-1,  1],
  12         [1 ,  1],
  13         [1 , -1],
  14 );
  15
  16 my @cpus;
  17
  18 my @newstable;
  19
  20 my $side = 4; # there are $side * $side CPUs
  21
  22 for my $line (0 .. ($side - 1)) {
  23         $cpus[$line] = [ ($line * $side) .. (($line + 1) * $side - 1) ]
  24 }
  25
  26 for my $cpu (0 .. ($side * $side - 1)) {
  27         my $x = $cpu / $side;
  28         my $y = $cpu % $side;
  29         for my $direction (0 .. $#diffs) {
  30                 my $nx = ($x + $diffs[$direction][0] + $side) % $side;
  31                 my $ny = ($y + $diffs[$direction][1] + $side) % $side;
  32                 $newstable[$cpu][$direction] = $cpus[$nx][$ny];
  33         }
  34 }
  35
  36 for my $direction (0 .. $#diffs) {
  37         print "$direction: news_out = {";
  38         printf 'news_in[%2d]', $newstable[$side * $side - 1][$direction];
  39         my @lst = 0 .. ($side * $side - 2);
  40         for my $cpu (reverse @lst) {
  41                 printf ', news_in[%2d]', $newstable[$cpu][$direction];
  42         }
  43         say '};'
  44 }