prep

[z3-treefoil] / vertices

#!/usr/bin/perl -w

use strict;

while (<>) {
  my @coords = qw(0 0 0);
  chomp;
  my $l = $_;
  for (;;) {
    print join '', @coords, ',';
    last unless $l =~ s/^.//;
    $_ = $&;
    my $delta = s/[A-Z]/lc $&/e ? +1 : -1;
    my $i =
      /x/ ? 0 :
      /y/ ? 1 :
      /z/ ? 2 :
      die "$_ ?";
    $coords[$i] += $delta;
  }
  print "\n";
}

STDOUT->error and die $!;