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14 | |
14 | |
15 | =head2 EXPORTED CONSTANTS |
15 | =head2 EXPORTED CONSTANTS |
16 | |
16 | |
17 | Marker types for each board position (ORed together): |
17 | Marker types for each board position (ORed together): |
18 | |
18 | |
19 | MARK_TRIANGLE # triangle mark |
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20 | MARK_SQUARE # square mark |
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21 | MARK_CIRCLE # circle mark |
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22 | MARK_CROSS # cross mark |
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23 | MARK_SMALL_B # small stone, used for scoring or marking |
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24 | MARK_SMALL_W # small stone, used for scoring or marking |
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25 | MARK_B # normal black stone |
19 | MARK_B # normal black stone |
26 | MARK_W # normal whit stone |
20 | MARK_W # normal whit stone |
27 | MARK_GRAYED # in conjunction with MARK_[BW], grays the stone |
21 | MARK_GRAYED # in conjunction with MARK_[BW], grays the stone |
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22 | |
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23 | MARK_SMALL_B # small stone, used for scoring or marking |
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24 | MARK_SMALL_W # small stone, used for scoring or marking |
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25 | MARK_SMALL_GRAYED # in conjunction with MARK_SMALL_[BW], grays the stone |
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26 | |
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27 | MARK_TRIANGLE # triangle mark |
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28 | MARK_SQUARE # square mark |
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29 | MARK_CIRCLE # circle mark |
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30 | MARK_CROSS # cross mark |
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31 | |
28 | MARK_LABEL # a text label |
32 | MARK_LABEL # a text label |
29 | MARK_HOSHI # this is a hoshi point (not used much) |
33 | MARK_HOSHI # this is a hoshi point (not used much) |
30 | MARK_MOVE # this is a regular move |
34 | MARK_MOVE # this is a regular move |
31 | MARK_KO # this is a ko position |
35 | MARK_KO # this is a ko position |
32 | MARK_REDRAW # ignored, can be used for your own purposes |
36 | MARK_REDRAW # ignored, can be used for your own purposes |
33 | |
37 | |
34 | COLOUR_WHITE # guarenteed to be 0 |
38 | COLOUR_WHITE # guaranteed to be 0 |
35 | COLOUR_BLACK # guarenteed to be 1 |
39 | COLOUR_BLACK # guaranteed to be 1 |
36 | |
40 | |
37 | MOVE_HANDICAP # used as "x-coordinate" for handicap moves |
41 | MOVE_HANDICAP # used as "x-coordinate" for handicap moves |
38 | MOVE_PASS # can be used as "x-coordinate" for pass moves |
42 | MOVE_PASS # can be used as "x-coordinate" for pass moves |
39 | |
43 | |
40 | =head2 METHODS |
44 | =head2 METHODS |
41 | |
45 | |
42 | =over 4 |
46 | =over 4 |
43 | |
47 | |
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52 | |
56 | |
53 | our $VERSION = '1.0'; |
57 | our $VERSION = '1.0'; |
54 | |
58 | |
55 | our @EXPORT = qw( |
59 | our @EXPORT = qw( |
56 | MARK_TRIANGLE MARK_SQUARE MARK_CIRCLE MARK_SMALL_B MARK_SMALL_W MARK_B |
60 | MARK_TRIANGLE MARK_SQUARE MARK_CIRCLE MARK_SMALL_B MARK_SMALL_W MARK_B |
57 | MARK_W MARK_GRAYED MARK_MOVE MARK_LABEL MARK_HOSHI MARK_KO MARK_CROSS |
61 | MARK_W MARK_GRAYED MARK_SMALL_GRAYED MARK_MOVE MARK_LABEL MARK_HOSHI MARK_KO MARK_CROSS |
58 | MARK_REDRAW |
62 | MARK_REDRAW |
59 | COLOUR_BLACK COLOUR_WHITE |
63 | COLOUR_BLACK COLOUR_WHITE |
60 | MOVE_HANDICAP MOVE_PASS |
64 | MOVE_HANDICAP MOVE_PASS |
61 | ); |
65 | ); |
62 | |
66 | |
63 | # marker types for each board position (ORed together) |
67 | # marker types for each board position (ORed together) |
64 | |
68 | |
65 | sub MARK_TRIANGLE (){ 0x0001 } |
69 | sub MARK_TRIANGLE (){ 0x0001 } |
66 | sub MARK_SQUARE (){ 0x0002 } |
70 | sub MARK_SQUARE (){ 0x0002 } |
67 | sub MARK_CIRCLE (){ 0x0004 } |
71 | sub MARK_CIRCLE (){ 0x0004 } |
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72 | sub MARK_CROSS (){ 0x0008 } |
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73 | |
68 | sub MARK_SMALL_B (){ 0x0008 } # small stone, used for scoring or marking |
74 | sub MARK_SMALL_B (){ 0x0010 } # small stone, used for scoring or marking |
69 | sub MARK_SMALL_W (){ 0x0010 } # small stone, used for scoring or marking |
75 | sub MARK_SMALL_W (){ 0x0020 } # small stone, used for scoring or marking |
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76 | sub MARK_SMALL_GRAYED (){ 0x0040 } |
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77 | |
70 | sub MARK_B (){ 0x0020 } # normal black stone |
78 | sub MARK_B (){ 0x0080 } # normal black stone |
71 | sub MARK_W (){ 0x0040 } # normal whit stone |
79 | sub MARK_W (){ 0x0100 } # normal whit stone |
72 | sub MARK_GRAYED (){ 0x0080 } # in conjunction with MARK_[BW], grays the stone |
80 | sub MARK_GRAYED (){ 0x0200 } # in conjunction with MARK_[BW], grays the stone |
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81 | |
73 | sub MARK_LABEL (){ 0x0100 } |
82 | sub MARK_LABEL (){ 0x0400 } |
74 | sub MARK_HOSHI (){ 0x0200 } # this is a hoshi point (not used much) |
83 | sub MARK_HOSHI (){ 0x0800 } # this is a hoshi point (not used much) |
75 | sub MARK_MOVE (){ 0x0400 } # this is a regular move |
84 | sub MARK_MOVE (){ 0x1000 } # this is a regular move |
76 | sub MARK_KO (){ 0x0800 } # this is a ko position |
85 | sub MARK_KO (){ 0x2000 } # this is a ko position |
77 | sub MARK_CROSS (){ 0x1000 } |
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78 | sub MARK_REDRAW (){ 0x8000 } |
86 | sub MARK_REDRAW (){ 0x8000 } |
79 | |
87 | |
80 | sub COLOUR_WHITE (){ 0 } |
88 | sub COLOUR_WHITE (){ 0 } |
81 | sub COLOUR_BLACK (){ 1 } |
89 | sub COLOUR_BLACK (){ 1 } |
82 | |
90 | |
83 | sub MOVE_PASS (){ undef } |
91 | sub MOVE_PASS (){ undef } |
84 | sub MOVE_HANDICAP (){ -2 } |
92 | sub MOVE_HANDICAP (){ -2 } |
85 | |
93 | |
86 | =item my $board = new $size |
94 | =item my $board = new $size |
87 | |
95 | |
88 | Creates a new empty board of the given size. |
96 | Creates a new empty board of the given size. |
89 | |
97 | |
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130 | |
138 | |
131 | my $max = $self->{max}; |
139 | my $max = $self->{max}; |
132 | |
140 | |
133 | while (@nodes) { |
141 | while (@nodes) { |
134 | my ($x, $y) = @{pop @nodes}; |
142 | my ($x, $y) = @{pop @nodes}; |
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143 | |
135 | unless ($seen{$x,$y}++) { |
144 | unless ($seen{$x,$y}++) { |
136 | if ($board->[$x][$y] & $mark) { |
145 | if ($board->[$x][$y] & $mark) { |
137 | push @found, [$x, $y]; |
146 | push @found, [$x, $y]; |
138 | |
147 | |
139 | push @nodes, [$x-1, $y] unless $seen{$x-1, $y} || $x <= 0; |
148 | push @nodes, [$x-1, $y] unless $seen{$x-1, $y} || $x <= 0; |
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251 | |
260 | |
252 | if ($set & MARK_MOVE) { |
261 | if ($set & MARK_MOVE) { |
253 | $$_ &= ~$mark_symbols for @{ $self->{unmark} || [] }; |
262 | $$_ &= ~$mark_symbols for @{ $self->{unmark} || [] }; |
254 | @{ $self->{unmark} } = $space; |
263 | @{ $self->{unmark} } = $space; |
255 | |
264 | |
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265 | # remark the space, in case the move was on the same spot as the |
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266 | # old mark |
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267 | $$space |= $set; |
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268 | |
256 | unless (${ $_->[5] ||= \my $hint }) { |
269 | unless (${ $_->[5] ||= \my $hint }) { |
257 | my ($own, $opp) = |
270 | my ($own, $opp) = |
258 | $set & MARK_B |
271 | $set & MARK_B |
259 | ? (MARK_B, MARK_W) |
272 | ? (MARK_B, MARK_W) |
260 | : (MARK_W, MARK_B); |
273 | : (MARK_W, MARK_B); |
261 | |
274 | |
262 | my (@capture, $suicide); |
275 | my (@capture, @suicide); |
263 | |
276 | |
264 | push @capture, $self->capture ($opp, $x-1, $y) if $x > 0 && $board->[$x-1][$y] & $opp; |
277 | push @capture, $self->capture ($opp, $x-1, $y) if $x > 0 && $board->[$x-1][$y] & $opp; |
265 | push @capture, $self->capture ($opp, $x+1, $y) if $x < $self->{max} && $board->[$x+1][$y] & $opp; |
278 | push @capture, $self->capture ($opp, $x+1, $y) if $x < $self->{max} && $board->[$x+1][$y] & $opp; |
266 | push @capture, $self->capture ($opp, $x, $y-1) if $y > 0 && $board->[$x][$y-1] & $opp; |
279 | push @capture, $self->capture ($opp, $x, $y-1) if $y > 0 && $board->[$x][$y-1] & $opp; |
267 | push @capture, $self->capture ($opp, $x, $y+1) if $y < $self->{max} && $board->[$x][$y+1] & $opp; |
280 | push @capture, $self->capture ($opp, $x, $y+1) if $y < $self->{max} && $board->[$x][$y+1] & $opp; |
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272 | # remove captured stones |
285 | # remove captured stones |
273 | $self->{captures}[$own == MARK_B ? COLOUR_BLACK : COLOUR_WHITE] += @capture; |
286 | $self->{captures}[$own == MARK_B ? COLOUR_BLACK : COLOUR_WHITE] += @capture; |
274 | $self->{board}[$_->[0]][$_->[1]] = 0 |
287 | $self->{board}[$_->[0]][$_->[1]] = 0 |
275 | for @capture; |
288 | for @capture; |
276 | |
289 | |
277 | $suicide += $self->capture ($own, $x, $y); |
290 | push @suicide, $self->capture ($own, $x, $y); |
278 | |
291 | |
279 | ${ $_->[5] } ||= !(@capture || $suicide); |
292 | ${ $_->[5] } ||= !(@capture || @suicide); |
280 | |
293 | |
281 | if ($suicide) { |
294 | if (@suicide) { |
282 | $self->{board}[$x][$y] = 0 |
295 | $self->{board}[$_->[0]][$_->[1]] = 0 |
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296 | for @suicide; |
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297 | # count suicides as other sides stones |
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298 | $self->{captures}[$opp == MARK_B ? COLOUR_BLACK : COLOUR_WHITE] += @suicide; |
283 | |
299 | |
284 | } elsif (!$suicide && @capture == 1) { |
300 | } elsif (!@suicide && @capture == 1) { |
285 | # possible ko. now check liberties on placed stone |
301 | # possible ko. now check liberties on placed stone |
286 | |
302 | |
287 | my $libs; |
303 | my $libs; |
288 | |
304 | |
289 | $libs++ if $x > 0 && !($board->[$x-1][$y] & $opp); |
305 | $libs++ if $x > 0 && !($board->[$x-1][$y] & $opp); |