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#!perl # labir.pl -- maze generator # Copyright (C) Zsban Ambrus 2001--2009 use warnings; use strict; use 5.010; my $W = 35; my $H = 19; my @a = ([(1)x(3+2*$W)], map({ [1, (0)x(1+2*$W), 1] } 1 .. 1+2*$H), [( +1)x(3+2*$W)]); for my $u (0 .. $H-1) { for my $v (0 .. $W-1) { $a[2+2*$u][2+2*$v] = 1; } } my @y = (-1)x($W*$H); my $C; $C = sub { no warnings "recursion"; my($v) = @_; my $w = $y[$v]; if ($w < 0) { return $v; } else { my $z = &$C($w); $y[$v] = $z; return $z; } }; my $U = sub { my($u, $v) = @_; my($c, $d) = (&$C($u), &$C($v)); $c != $d and $y[$c] = $d; }; while (&$C(0) != &$C($W*$H-1)) { my $a = 1 < rand(2); my $x = int(rand($H)); my $y = int(rand($W)); $a ? $y < $W - 1 : $x < $H - 1 or next; my ($u, $v) = (($x+!$a)*$W+($y+$a), $x*$W+$y); &$C($u) != &$C($v) || rand(5) < 1 or next; # here's the magic &$U($u, $v); $a[2+!$a+2*$x][2+$a+2*$y] = 1; } for my $r (1 .. 1+2*$H) { for my $c (1 .. 1+2*$W) { my $o = $a[$r][$c]; my $v = $a[$r-1][$c] && $a[$r+1][$c]; my $h = $a[$r][$c-1] && $a[$r][$c+1]; print( 2 == $r && 2 == $c ? "@" : 2*$H == $r && 1+2*$W == $c ? ">" : $o ? " " : $v ? ($h ? " " : "-") : ($h ? "|" : "+") ); } print "\n"; } __END__

Here's an example output.

+-------+---+---+-----+---+-----+-+-+-----+-------+-+-+---+---------+- ++ |@ | | | | | | | | | | | | | | +| +-- | +-+---+-- | ----+ | | --- | | +-+ +-+-+-+---+ +-+ | | | +---+-+ +| | | | | | | | | | | | | | | | | | | | | +| +-+ +-+-+ | --+-+-+ +-+ | +-+ +-+-+ | | +-+ | --+ +-- +-+ +-+-+ | -- ++ | | | | | | | | | | | | | | | | | | | +| +-+ | --+-+-+-+-+ | --+ ----+-+-+-+ +-+ +-- +-+---+ +-- +-- --+-+-- | +| | | | | | | | | | | | | | | | | | +| +---+ | +-+-+-----+ | | +-+-+-+-+-+ | +-+ +-- | | +-+-+-- +-+ | --+- ++ | | | | | | | | | | | | | | | | | | | | +| | --+ +---+ +-+ +-+ --+ +-+-+-+ +-+ +-+-+-+ | --+-+ | | +---+ | | +-+ +| | | | | | | | | | | | | | | | | | | | +| +-+-- +-+ | +-+ +-+-- +-+-+-+ +-+ | +-+-- +-+-+-+-+-+-+ | +-+ +-+ +- ++ | | | | | | | | | | | | | | | | | | | | | | +| | +-- +-+ +-+-+-- +-+ | +-+ +-- +-- --+ +---+ | +-+-+ | | +-+ | --+ | +| | | | | | | | | | | | | | | | +| | +---+-+-+-- +-+ --+ | | +-+-- | | | +-+ | +-+ | | +-+-+ +-+ ----+ +- ++ | | | | | | | | | | | | | | | | | | | | | | +| +-+-+ +-+-+-+ | +-- | +-+ | | --+-+-+-+-+ +-+ +-+-+ | +-+ --+ | | | +- ++ | | | | | | | | | | | | | | | | | | | | | +| +-+ +-+-- +-+-+ +-+-+---+ +-+-- | ----+-+ | +-- +-+ | | --+ | +---+ +| | | | | | | | | | | | | | | +| +-+ +-+---+ +-- | +-+-+ | | +-------- +-+ | +-+ +-+ +-+ | +-+---- ---- ++ | | | | | | | | | | | | | | | | +| | | --+ | --+ | | --+ | +-- +---+ --+ +-- | --+-----+-+-+ | | | | | +- ++ | | | | | | | | | | | | | | | | | | | +| +-+ | +-+-----+---- +-+-+ | --+---+-+-+ | +---+---+ +-+ +-+-+-+ | | +| | | | | | | | | | | | | | | | | | | | | | | +| | | +-+-+ +-- +-- --+-+ | | +---+ --+ +-+ | | +-+-+-+ | | | | | +-+ | +| | | | | | | | | | | | | | | | | | | | | | | | +| +-+ +-+-+ +---------+ | +-+-+ --+ --+ | +-+-+-+ | +-+-+ | | +-+ | | | +| | | | | | | | | | | | | | | | | | | +| | | | | | | +-----+-+-+ | | | ----+ +-+-+-+ | +-+-+ | | +-+ +-- | | | +| | | | | | | | | | | | | | | | | | | | | | +| | +---+-+-+ | | | +---- +-+ ----+-+ +-+-+-+ | +-- | +-+ +-+-- +-- | +| | | | | | | | | | | | | | | +| +-+ +-- --+---+-+ +-+-- +-+-- --+-+-- | | | | +-+ +-+-+-+ --+ +-+-+-+ +| | | | | | | | | | | | | | | | | | | | | | | | +> +-+-------+-----+-+-+---+-+-----+-+---+---+-+---+-+-+-+-+---+-+-+-+-+- ++

In reply to Random maze generator by ambrus

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