… | |
… | |
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_BLACK # used for $board->{last} |
38 | COLOUR_WHITE # guaranteed to be 0 |
35 | COLOUR_WHITE # to mark the colour of the last move |
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 handicap 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 | |
… | |
… | |
48 | |
52 | |
49 | use Carp (); |
53 | use Carp (); |
50 | |
54 | |
51 | use base Exporter::; |
55 | use base Exporter::; |
52 | |
56 | |
53 | our $VERSION = '1.0'; |
57 | our $VERSION = '1.01'; |
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 |
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_CIRCLE (){ 0x1000 } |
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|
78 | sub MARK_REDRAW (){ 0x8000 } |
86 | sub MARK_REDRAW (){ 0x8000 } |
79 | |
87 | |
80 | sub COLOUR_BLACK (){ 0 } |
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81 | sub COLOUR_WHITE (){ 1 } |
88 | sub COLOUR_WHITE (){ 0 } |
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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 | |
90 | C<< $board->{size} >> stores the board size. |
98 | C<< $board->{size} >> stores the board size. |
91 | |
99 | |
92 | C<< $board->{max} >> stores the maximum board coordinate (size-1). |
100 | C<< $board->{max} >> stores the maximum board coordinate (size-1). |
93 | |
101 | |
94 | C<< $board->{captures}[COLOUR] >> stores the number of captured stones for |
102 | C<< $board->{captures}[COLOUR_xxx] >> stores the number of captured stones for |
95 | the given colour. |
103 | the given colour. |
96 | |
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97 | C<< $board->{last} >> stores the colour of the last move that was played. |
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98 | |
104 | |
99 | C<< $board->{board} >> stores a two-dimensional array with board contents. |
105 | C<< $board->{board} >> stores a two-dimensional array with board contents. |
100 | |
106 | |
101 | =cut |
107 | =cut |
102 | |
108 | |
103 | sub new { |
109 | sub new { |
104 | my $class = shift; |
110 | my $class = shift; |
105 | my $size = shift; |
111 | my $size = shift; |
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112 | |
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113 | unless ($size > 0) { |
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114 | Carp::croak ("no board size given!"); |
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115 | } |
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116 | |
106 | bless { |
117 | bless { |
107 | max => $size - 1, |
118 | max => $size - 1, |
108 | size => $size, |
119 | size => $size, |
109 | board => [map [(0) x $size], 1 .. $size], |
120 | board => [map [(0) x $size], 1 .. $size], |
110 | captures => [0, 0], # captures |
121 | captures => [0, 0], # captures |
111 | #timer => [], |
122 | #timer => [], |
112 | #score => [], |
123 | #score => [], |
113 | #last => COLOUR_..., |
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114 | @_ |
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115 | }, |
124 | @_, |
116 | $class; |
125 | }, $class |
117 | } |
126 | } |
118 | |
127 | |
119 | # inefficient and primitive, I hear you say? |
128 | # inefficient and primitive, I hear you say? |
120 | # well... you are right :) |
129 | # well... you are right :) |
121 | # use an extremely dumb floodfill algorithm to get rid of captured stones |
130 | # use an extremely dumb floodfill algorithm to get rid of captured stones |
… | |
… | |
129 | |
138 | |
130 | my $max = $self->{max}; |
139 | my $max = $self->{max}; |
131 | |
140 | |
132 | while (@nodes) { |
141 | while (@nodes) { |
133 | my ($x, $y) = @{pop @nodes}; |
142 | my ($x, $y) = @{pop @nodes}; |
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|
143 | |
134 | unless ($seen{$x,$y}++) { |
144 | unless ($seen{$x,$y}++) { |
135 | if ($board->[$x][$y] & $mark) { |
145 | if ($board->[$x][$y] & $mark) { |
136 | push @found, [$x, $y]; |
146 | push @found, [$x, $y]; |
137 | |
147 | |
138 | push @nodes, [$x-1, $y] unless $seen{$x-1, $y} || $x <= 0; |
148 | push @nodes, [$x-1, $y] unless $seen{$x-1, $y} || $x <= 0; |
… | |
… | |
161 | specified in C<$clr>, then setting bits specified in C<$set>. |
171 | specified in C<$clr>, then setting bits specified in C<$set>. |
162 | |
172 | |
163 | If C<$set> includes C<MARK_LABEL>, the label text must be given in |
173 | If C<$set> includes C<MARK_LABEL>, the label text must be given in |
164 | C<$label>. |
174 | C<$label>. |
165 | |
175 | |
166 | If C<$set> contains C<MARK_MOVE>, then a circle symbol will be placed |
176 | If C<$set> contains C<MARK_MOVE> then surrounded stones will be removed |
167 | at this coordinate. Also, surrounded stones will be removed from the |
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|
168 | board and (simple) Kos are detected and marked with square symbols and |
177 | from the board and (simple) Kos are detected and marked with square |
169 | C<MARK_KO>. The circle and square markings are removed with the next |
178 | symbols and C<MARK_KO>, after removing other marking symbols. The |
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179 | markings are also removed with the next next update structure that uses |
170 | update that uses C<MARK_MOVE>, so this flag is suited well for marking, |
180 | C<MARK_MOVE>, so this flag is suited well for marking, well, moves. Note |
171 | well, moves. Note that you can make invalid "moves" (such as suicide) and |
181 | that you can make invalid "moves" (such as suicide) and C<update> will |
172 | C<update> will try to cope with it. You can use C<is_valid_move> to avoid |
182 | try to cope with it. You can use C<is_valid_move> to avoid making illegal |
173 | making illegal moves. |
183 | moves. |
174 | |
184 | |
175 | For handicap "moves", currently only board sizes 9, 13 and 19 are |
185 | For handicap "moves", currently only board sizes 9, 13 and 19 are |
176 | supported and only handicap values from 2 to 9. The placement follows the |
186 | supported and only handicap values from 2 to 9. The placement follows the |
177 | IGS rules, if you want other placements, you have to set it up yourself. |
187 | IGS rules, if you want other placements, you have to set it up yourself. |
178 | |
188 | |
… | |
… | |
211 | 7 => [qw(0,2 2,0 0,0 2,2 0,1 2,1 1,1)], |
221 | 7 => [qw(0,2 2,0 0,0 2,2 0,1 2,1 1,1)], |
212 | 8 => [qw(0,2 2,0 0,0 2,2 0,1 2,1 1,0 1,2 )], |
222 | 8 => [qw(0,2 2,0 0,0 2,2 0,1 2,1 1,0 1,2 )], |
213 | 9 => [qw(0,2 2,0 0,0 2,2 0,1 2,1 1,0 1,2 1,1)], |
223 | 9 => [qw(0,2 2,0 0,0 2,2 0,1 2,1 1,0 1,2 1,1)], |
214 | ); |
224 | ); |
215 | |
225 | |
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226 | our $mark_symbols = MARK_CIRCLE | MARK_SQUARE | MARK_TRIANGLE | MARK_CROSS | MARK_KO; |
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227 | |
216 | sub update { |
228 | sub update { |
217 | my ($self, $path) = @_; |
229 | my ($self, $path) = @_; |
218 | |
230 | |
219 | my $board = $self->{board}; |
231 | my $board = $self->{board}; |
220 | |
232 | |
221 | for (@$path) { |
233 | for (@$path) { |
222 | my ($x, $y, $clr, $set, $label) = @$_; |
234 | my ($x, $y, $clr, $set, $label) = @$_; |
223 | |
235 | |
224 | my $nodemask = |
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225 | $_ == $path->[-1] |
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226 | ? ~0 |
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227 | : ~(MARK_SQUARE | MARK_TRIANGLE | MARK_CIRCLE | MARK_LABEL | MARK_KO); |
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228 | |
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229 | if (!defined $x) { |
236 | if (!defined $x) { |
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237 | $$_ &= ~$mark_symbols for @{ delete $self->{unmark} || [] }; |
230 | # pass |
238 | # pass |
231 | $self->{last} = $set & MARK_B ? COLOUR_BLACK : COLOUR_WHITE; |
|
|
232 | |
239 | |
233 | } elsif ($x == MOVE_HANDICAP) { |
240 | } elsif ($x == MOVE_HANDICAP) { |
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|
241 | $$_ &= ~$mark_symbols for @{ delete $self->{unmark} || [] }; |
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242 | |
234 | # $y = #handicap stones |
243 | # $y = #handicap stones |
235 | my $c = $HANDICAP_COORD{$self->{size}} |
244 | my $c = $HANDICAP_COORD{$self->{size}} |
236 | or Carp::croak "$self->{size}: illegal board size for handicap"; |
245 | or Carp::croak "$self->{size}: illegal board size for handicap"; |
237 | my $h = $HANDICAP_XY{$y} |
246 | my $h = $HANDICAP_XY{$y} |
238 | or Carp::croak "$y: illegal number of handicap stones"; |
247 | or Carp::croak "$y: illegal number of handicap stones"; |
… | |
… | |
241 | my ($x, $y) = map $c->[$_], split /,/; |
250 | my ($x, $y) = map $c->[$_], split /,/; |
242 | $board->[$x][$y] = MARK_B | MARK_MOVE; |
251 | $board->[$x][$y] = MARK_B | MARK_MOVE; |
243 | } |
252 | } |
244 | |
253 | |
245 | } else { |
254 | } else { |
246 | $board->[$x][$y] = |
255 | my $space = \$board->[$x][$y]; |
247 | $board->[$x][$y] |
256 | |
248 | & ~$clr |
257 | $$space = $$space & ~$clr | $set; |
249 | | $set |
|
|
250 | & $nodemask; |
|
|
251 | |
258 | |
252 | $self->{label}[$x][$y] = $label if $set & MARK_LABEL; |
259 | $self->{label}[$x][$y] = $label if $set & MARK_LABEL; |
253 | |
260 | |
254 | if ($set & MARK_MOVE) { |
261 | if ($set & MARK_MOVE) { |
255 | $self->{last} = $set & MARK_B ? COLOUR_BLACK : COLOUR_WHITE; |
262 | $$_ &= ~$mark_symbols for @{ $self->{unmark} || [] }; |
|
|
263 | @{ $self->{unmark} } = $space; |
|
|
264 | |
|
|
265 | # remark the space, in case the move was on the same spot as the |
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|
266 | # old mark |
|
|
267 | $$space |= $set; |
256 | |
268 | |
257 | unless (${ $_->[5] ||= \my $hint }) { |
269 | unless (${ $_->[5] ||= \my $hint }) { |
258 | my ($own, $opp) = |
270 | my ($own, $opp) = |
259 | $set & MARK_B |
271 | $set & MARK_B |
260 | ? (MARK_B, MARK_W) |
272 | ? (MARK_B, MARK_W) |
261 | : (MARK_W, MARK_B); |
273 | : (MARK_W, MARK_B); |
262 | |
274 | |
263 | my (@capture, $suicide); |
275 | my (@capture, @suicide); |
264 | |
276 | |
265 | 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; |
266 | 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; |
267 | 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; |
268 | 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] & $opp; |
269 | |
281 | |
270 | # keep only unique coordinates |
282 | # keep only unique coordinates |
271 | @capture = do { my %seen; grep !$seen{"$_->[0],$_->[1]"}++, @capture }; |
283 | @capture = do { my %seen; grep !$seen{"$_->[0],$_->[1]"}++, @capture }; |
272 | |
284 | |
273 | # remove captured stones |
285 | # remove captured stones |
274 | $self->{captures}[$self->{last}] += @capture; |
286 | $self->{captures}[$own == MARK_B ? COLOUR_BLACK : COLOUR_WHITE] += @capture; |
275 | $self->{board}[$_->[0]][$_->[1]] &= ~(MARK_B | MARK_W | MARK_MOVE) |
287 | $self->{board}[$_->[0]][$_->[1]] = 0 |
276 | for @capture; |
288 | for @capture; |
277 | |
289 | |
278 | $suicide += $self->capture ($own, $x, $y); |
290 | push @suicide, $self->capture ($own, $x, $y); |
279 | |
291 | |
280 | ${ $_->[5] } ||= !(@capture || $suicide); |
292 | ${ $_->[5] } ||= !(@capture || @suicide); |
281 | |
293 | |
|
|
294 | if (@suicide) { |
|
|
295 | $self->{board}[$_->[0]][$_->[1]] = 0 |
|
|
296 | for @suicide; |
|
|
297 | # count suicides as other sides stones |
|
|
298 | $self->{captures}[$opp == MARK_B ? COLOUR_BLACK : COLOUR_WHITE] += @suicide; |
|
|
299 | |
282 | if (!$suicide && @capture == 1) { |
300 | } elsif (!@suicide && @capture == 1) { |
283 | # possible ko. now check liberties on placed stone |
301 | # possible ko. now check liberties on placed stone |
284 | |
302 | |
285 | my $libs; |
303 | my $libs; |
286 | |
304 | |
287 | $libs++ if $x > 0 && !($board->[$x-1][$y] & $opp); |
305 | $libs++ if $x > 0 && !($board->[$x-1][$y] & $opp); |
288 | $libs++ if $x < $self->{max} && !($board->[$x+1][$y] & $opp); |
306 | $libs++ if $x < $self->{max} && !($board->[$x+1][$y] & $opp); |
289 | $libs++ if $y > 0 && !($board->[$x][$y-1] & $opp); |
307 | $libs++ if $y > 0 && !($board->[$x][$y-1] & $opp); |
290 | $libs++ if $y < $self->{max} && !($board->[$x][$y+1] & $opp); |
308 | $libs++ if $y < $self->{max} && !($board->[$x][$y+1] & $opp); |
291 | |
309 | |
292 | if ($libs == 1) { |
310 | if ($libs == 1) { |
293 | $board->[$x][$y] = $board->[$x][$y] & ~MARK_CIRCLE | (MARK_KO & $nodemask); |
311 | $$space = $$space & ~$mark_symbols | MARK_KO; |
|
|
312 | |
294 | ($x, $y) = @{$capture[0]}; |
313 | ($x, $y) = @{$capture[0]}; |
295 | $board->[$x][$y] |= MARK_KO & $nodemask; |
314 | $board->[$x][$y] |= MARK_KO; |
|
|
315 | |
|
|
316 | push @{ $self->{unmark} }, \$board->[$x][$y]; |
296 | } |
317 | } |
297 | } |
318 | } |
298 | } |
319 | } |
299 | } |
320 | } |
300 | } |
321 | } |
… | |
… | |
313 | sub is_valid_move { |
334 | sub is_valid_move { |
314 | my ($self, $colour, $x, $y, $may_suicide) = @_; |
335 | my ($self, $colour, $x, $y, $may_suicide) = @_; |
315 | |
336 | |
316 | my $board = $self->{board}; |
337 | my $board = $self->{board}; |
317 | |
338 | |
318 | return if $board->[$x][$y] & (MARK_B | MARK_W | MARK_KO); |
339 | return if $board->[$x][$y] & (MARK_B | MARK_W | MARK_KO) |
|
|
340 | && !($board->[$x][$y] & MARK_GRAYED); |
319 | |
341 | |
320 | if ($may_suicide) { |
342 | if ($may_suicide) { |
321 | return 1; |
343 | return 1; |
322 | } else { |
344 | } else { |
323 | my ($own, $opp) = $colour == COLOUR_BLACK |
345 | my ($own, $opp) = $colour == COLOUR_BLACK |