#!/usr/bin/perl -w
# Copyright 2010, 2011 Kevin Ryde
# This file is part of Math-PlanePath.
#
# Math-PlanePath is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by the Free
# Software Foundation; either version 3, or (at your option) any later
# version.
#
# Math-PlanePath is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
# or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
# for more details.
#
# You should have received a copy of the GNU General Public License along
# with Math-PlanePath. If not, see .
use 5.004;
use strict;
use POSIX ();
use Math::PlanePath::SierpinskiArrowhead;
# uncomment this to run the ### lines
use Smart::Comments;
{
my $path = Math::PlanePath::SierpinskiArrowhead->new;
my @rows = ((' ' x 79) x 64);
foreach my $n (0 .. 3 * 3**4) {
my ($x, $y) = $path->n_to_xy ($n);
$x += 32;
substr ($rows[$y], $x,1, '*');
}
local $,="\n";
print reverse @rows;
exit 0;
}
{
my @rows = ((' ' x 64) x 32);
foreach my $p (0 .. 31) {
foreach my $q (0 .. 31) {
next if ($p & $q);
my $x = $p-$q;
my $y = $p+$q;
next if ($y >= @rows);
$x += 32;
substr ($rows[$y], $x,1, '*');
}
}
local $,="\n";
print reverse @rows;
exit 0;
}