30 |
|
|
31 |
my @board = map { split(//) } split(/\n/, $board); |
my @board = map { split(//) } split(/\n/, $board); |
32 |
my @trace; |
my @trace; |
33 |
|
my @visited = (' ') x ($#board + 1); |
34 |
|
|
35 |
# line length |
# line length |
36 |
my $ll = 8 * 2 + 1; |
my $ll = 8 * 2 + 1; |
48 |
# path traversed |
# path traversed |
49 |
my @directions; |
my @directions; |
50 |
|
|
51 |
my @found; |
my @shapes_found; |
52 |
|
|
53 |
|
my @shapes_start = ( '0,0' ); #( qw/0,0 1,0 0,3/ ); |
54 |
|
|
55 |
sub draw { |
sub draw { |
56 |
my $o = 0; |
my $o = 0; |
57 |
my $out; |
my $out = "\n " . join('', |
58 |
|
('0 1 2 3 4 5 6 7 8 | ') x 3 |
59 |
|
) . "\n"; |
60 |
while ( $o < $#board ) { |
while ( $o < $#board ) { |
61 |
|
my $l = '|'; |
62 |
|
if ( $o % ($ll*2) == 0) { |
63 |
|
my $y = int($o / ($ll*2)); |
64 |
|
$out .= "$y "; |
65 |
|
$l = $y; |
66 |
|
} else { |
67 |
|
$out .= " "; |
68 |
|
} |
69 |
|
|
70 |
$out .= join('', @board[ $o .. $o + $ll - 1 ]); |
$out .= join('', @board[ $o .. $o + $ll - 1 ]); |
71 |
$out .= ' '; |
$out .= " $l "; |
72 |
$out .= join('', @trace[ $o .. $o + $ll - 1 ]); |
$out .= join('', @trace[ $o .. $o + $ll - 1 ]); |
73 |
$out .= "\n"; |
$out .= " $l "; |
74 |
|
$out .= join('', @visited[ $o .. $o + $ll - 1 ]); |
75 |
|
$out .= " $l\n"; |
76 |
$o += $ll; |
$o += $ll; |
77 |
} |
} |
78 |
|
|
79 |
|
$out .= "\n"; |
80 |
|
|
81 |
return $out; |
return $out; |
82 |
} |
} |
83 |
|
|
84 |
sub trace { |
sub trace { |
85 |
warn "## trace $pos\n"; |
warn "## trace $pos\n"; |
86 |
$trace[ $pos ] = $board[ $pos ]; |
$trace[ $pos ] = $board[ $pos ]; |
87 |
|
$visited[$pos]++; |
88 |
|
} |
89 |
|
|
90 |
|
sub x_y { |
91 |
|
my $p = shift; |
92 |
|
|
93 |
|
$p ||= $pos; |
94 |
|
|
95 |
|
my $y = int($p / ($ll*2)); |
96 |
|
my $x = int(($p % $ll) / 2); |
97 |
|
|
98 |
|
warn "## x_y($p) -> $x,$y\n"; |
99 |
|
|
100 |
|
# return ($x,$y) if wantarray; |
101 |
|
return "$x,$y"; |
102 |
} |
} |
103 |
|
|
104 |
sub move { |
sub move { |
|
warn "move $step $step_name[$step]\n"; |
|
105 |
$pos += $move_by[ $step ]; |
$pos += $move_by[ $step ]; |
106 |
trace; |
trace; |
107 |
$pos += $move_by[ $step ]; |
$pos += $move_by[ $step ]; |
108 |
trace; |
trace; |
109 |
push @directions, $step; |
push @directions, $step; |
110 |
|
warn "move $step $step_name[$step] to ", x_y, "\n"; |
111 |
} |
} |
112 |
|
|
113 |
sub follow { |
sub follow { |
118 |
|
|
119 |
my $ok_path = qr/[\|\-]/; |
my $ok_path = qr/[\|\-]/; |
120 |
|
|
121 |
|
my @corners; |
122 |
|
my $corners_usage; |
123 |
|
|
124 |
sub can_turn { |
sub can_turn { |
125 |
my $try_step = shift; |
my $try_step = shift; |
126 |
die "no step?" unless defined $try_step; |
die "no step?" unless defined $try_step; |
131 |
|
|
132 |
my $old = $trace[ $turn_pos ]; |
my $old = $trace[ $turn_pos ]; |
133 |
$trace[ $turn_pos ] = '?'; |
$trace[ $turn_pos ] = '?'; |
134 |
warn "TEST\n",draw( @trace ); |
$trace[ $pos ] = '*'; |
135 |
|
warn "TEST ", x_y($turn_pos), "\n",draw; |
136 |
$trace[ $turn_pos ] = $old; |
$trace[ $turn_pos ] = $old; |
137 |
|
|
138 |
if ( $board[ $turn_pos ] =~ $ok_path ) { |
if ( $board[ $turn_pos ] =~ $ok_path ) { |
139 |
warn "OK can_turn $try_step $step_name[$try_step] turn_pos = $turn_pos b($board[$turn_pos]) t($trace[$turn_pos])"; |
my $xy = x_y($pos); |
140 |
|
warn "OK can_turn $try_step $step_name[$try_step] turn_pos = $turn_pos b($board[$turn_pos]) t($trace[$turn_pos]) from $xy\n"; |
141 |
$step = $try_step; |
$step = $try_step; |
142 |
|
push @corners, $xy; |
143 |
|
$corners_usage->{$xy}++; |
144 |
return 1; |
return 1; |
145 |
} else { |
} else { |
146 |
warn "NOPE can_turn $try_step $step_name[$try_step] turn_pos = $turn_pos b($board[$turn_pos]) t($trace[$turn_pos])"; |
warn "NOPE can_turn $try_step $step_name[$try_step] turn_pos = $turn_pos b($board[$turn_pos]) t($trace[$turn_pos])\n"; |
147 |
return 0; |
return 0; |
148 |
} |
} |
149 |
} |
} |
164 |
|
|
165 |
$pos = $y * $ll * 2 + $x * 2; |
$pos = $y * $ll * 2 + $x * 2; |
166 |
|
|
|
warn "<<< shape from $x,$y pos: $pos\n"; |
|
167 |
@trace = ($unknown) x ( $#board + 1 ); |
@trace = ($unknown) x ( $#board + 1 ); |
168 |
@directions = (); |
@directions = (); |
169 |
|
@corners = (); |
170 |
trace; |
trace; |
171 |
|
|
172 |
my $len = 0; |
my $len = 0; |
173 |
|
$step = 0; |
174 |
|
|
175 |
|
my $usage = $corners_usage->{"$x,$y"} || 0; |
176 |
|
|
177 |
|
warn "<<< shape from $x,$y [usage: $usage] pos: $pos\n"; |
178 |
|
|
179 |
|
if ( $usage > 4 ) { |
180 |
|
warn "SKIPPED, usage > 4\n"; |
181 |
|
return; |
182 |
|
} |
183 |
|
|
184 |
while( 1 ) { |
while( 1 ) { |
185 |
|
|
198 |
warn "find line continuation from $step $step_name[$step]...\n"; |
warn "find line continuation from $step $step_name[$step]...\n"; |
199 |
can_turn( $step - 1 ) || can_turn( $step + 1 ) || die "can't find new direction"; |
can_turn( $step - 1 ) || can_turn( $step + 1 ) || die "can't find new direction"; |
200 |
} |
} |
201 |
warn draw( @trace ); |
warn draw; |
202 |
|
|
203 |
if ( $debug ) { |
if ( $debug ) { |
204 |
print "WAIT> press enter | ",show_directions; my $foo = <STDIN>; |
print "WAIT> press enter | ",show_directions; my $foo = <STDIN>; |
205 |
} |
} |
206 |
} |
} |
207 |
|
|
208 |
push @found, { x => $x, y => $y, len => $len, directions => show_directions }; |
push @shapes_found, { x => $x, y => $y, len => $len, directions => show_directions }; |
209 |
|
|
210 |
|
warn "### corners: ",join(' ', map { $_ . " [" . $corners_usage->{$_} . "]" } @corners),"\n"; |
211 |
warn ">>> ended at $pos, line length: $len, directions traversed: ",show_directions,"\n"; |
warn ">>> ended at $pos, line length: $len, directions traversed: ",show_directions,"\n"; |
212 |
|
|
213 |
|
foreach my $c ( @corners ) { |
214 |
|
if ( ! grep( /\Q$c\E/, @shapes_start ) ) { |
215 |
|
warn "INFO: added corner $c as shape start\n"; |
216 |
|
push @shapes_start, $c; |
217 |
|
} |
218 |
|
} |
219 |
|
|
220 |
print "WAIT> press enter"; my $foo = <STDIN>; |
print "WAIT> press enter"; my $foo = <STDIN>; |
221 |
|
|
222 |
return $len; |
return $len; |
223 |
} |
} |
224 |
|
|
225 |
my $shapes = '0,0 1,0 0,3'; |
foreach my $start ( @shapes_start ) { |
226 |
|
my ($x,$y) = split(/,/,$start); |
227 |
|
if ( $x < 8 && $y < 8 ) { |
228 |
|
my $len = shape( split(/,/,$start) ); |
229 |
|
warn "## $start has $len elements\n"; |
230 |
|
} else { |
231 |
|
warn "SKIPPED $start\n"; |
232 |
|
} |
233 |
|
} |
234 |
|
|
235 |
|
sub is_symmetric { |
236 |
|
my $path = shift || die "no path?"; |
237 |
|
|
238 |
foreach my $start ( split(/\s/,$shapes) ) { |
my $h = length($path)/2; |
239 |
my $len = shape( split(/,/,$start) ); |
return 0 if int($h) != $h; |
240 |
warn "## $start has $len elements\n"; |
my ($l,$r) = ( substr($path,0,$h), substr($path,$h) ); |
241 |
|
$r =~ tr/lrud/rldu/; |
242 |
|
# warn "$l -- $r\n"; |
243 |
|
return 0 unless $l eq $r; |
244 |
|
return 1; |
245 |
} |
} |
246 |
|
|
247 |
print ">>> RESULTS:\n"; |
print ">>> RESULTS:\n"; |
248 |
foreach my $r ( @found ) { |
foreach my $r ( @shapes_found ) { |
249 |
printf "%2d,%-2d len: %-4d directions: %s\n", $r->{x}, $r->{y}, $r->{len}, $r->{directions}; |
printf "%2d,%-2d len: %-4d directions: %s %s\n", |
250 |
|
$r->{x}, $r->{y}, $r->{len}, $r->{directions}, is_symmetric($r->{directions}) ? 'symetric' : ''; |
251 |
} |
} |