| … | |
… | |
| 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 |
19 | MARK_TRIANGLE # triangle mark |
| 20 | MARK_SQUARE # square mark |
20 | MARK_SQUARE # square mark |
| 21 | MARK_CIRCLE # circle mark |
21 | MARK_CIRCLE # circle mark |
|
|
22 | MARK_CROSS # cross mark |
| 22 | MARK_SMALL_B # small stone, used for scoring or marking |
23 | MARK_SMALL_B # small stone, used for scoring or marking |
| 23 | MARK_SMALL_W # small stone, used for scoring or marking |
24 | MARK_SMALL_W # small stone, used for scoring or marking |
| 24 | MARK_B # normal black stone |
25 | MARK_B # normal black stone |
| 25 | MARK_W # normal whit stone |
26 | MARK_W # normal whit stone |
| 26 | MARK_GRAYED # in conjunction with MARK_[BW], grays the stone |
27 | MARK_GRAYED # in conjunction with MARK_[BW], grays the stone |
| … | |
… | |
| 28 | MARK_HOSHI # this is a hoshi point (not used much) |
29 | MARK_HOSHI # this is a hoshi point (not used much) |
| 29 | MARK_MOVE # this is a regular move |
30 | MARK_MOVE # this is a regular move |
| 30 | MARK_KO # this is a ko position |
31 | MARK_KO # this is a ko position |
| 31 | MARK_REDRAW # ignored, can be used for your own purposes |
32 | MARK_REDRAW # ignored, can be used for your own purposes |
| 32 | |
33 | |
| 33 | COLOUR_BLACK # used for $board->{last} |
34 | COLOUR_WHITE # guarenteed to be 0 |
| 34 | COLOUR_WHITE # to mark the colour of the last move |
35 | COLOUR_BLACK # guarenteed to be 1 |
| 35 | |
36 | |
| 36 | MOVE_HANDICAP # used as "x-coordinate" for handicap moves |
37 | MOVE_HANDICAP # used as "x-coordinate" for handicap moves |
| 37 | MOVE_PASS # can be used as "x-coordinate" for handicap moves |
38 | MOVE_PASS # can be used as "x-coordinate" for pass moves |
| 38 | |
39 | |
| 39 | =head2 METHODS |
40 | =head2 METHODS |
| 40 | |
41 | |
| 41 | =over 4 |
42 | =over 4 |
| 42 | |
43 | |
| … | |
… | |
| 51 | |
52 | |
| 52 | our $VERSION = '1.0'; |
53 | our $VERSION = '1.0'; |
| 53 | |
54 | |
| 54 | our @EXPORT = qw( |
55 | our @EXPORT = qw( |
| 55 | MARK_TRIANGLE MARK_SQUARE MARK_CIRCLE MARK_SMALL_B MARK_SMALL_W MARK_B |
56 | MARK_TRIANGLE MARK_SQUARE MARK_CIRCLE MARK_SMALL_B MARK_SMALL_W MARK_B |
| 56 | MARK_W MARK_GRAYED MARK_MOVE MARK_LABEL MARK_HOSHI MARK_KO |
57 | MARK_W MARK_GRAYED MARK_MOVE MARK_LABEL MARK_HOSHI MARK_KO MARK_CROSS |
| 57 | MARK_REDRAW |
58 | MARK_REDRAW |
| 58 | COLOUR_BLACK COLOUR_WHITE |
59 | COLOUR_BLACK COLOUR_WHITE |
| 59 | MOVE_HANDICAP MOVE_PASS |
60 | MOVE_HANDICAP MOVE_PASS |
| 60 | ); |
61 | ); |
| 61 | |
62 | |
| … | |
… | |
| 71 | sub MARK_GRAYED (){ 0x0080 } # in conjunction with MARK_[BW], grays the stone |
72 | sub MARK_GRAYED (){ 0x0080 } # in conjunction with MARK_[BW], grays the stone |
| 72 | sub MARK_LABEL (){ 0x0100 } |
73 | sub MARK_LABEL (){ 0x0100 } |
| 73 | sub MARK_HOSHI (){ 0x0200 } # this is a hoshi point (not used much) |
74 | sub MARK_HOSHI (){ 0x0200 } # this is a hoshi point (not used much) |
| 74 | sub MARK_MOVE (){ 0x0400 } # this is a regular move |
75 | sub MARK_MOVE (){ 0x0400 } # this is a regular move |
| 75 | sub MARK_KO (){ 0x0800 } # this is a ko position |
76 | sub MARK_KO (){ 0x0800 } # this is a ko position |
|
|
77 | sub MARK_CROSS (){ 0x1000 } |
| 76 | sub MARK_REDRAW (){ 0x8000 } |
78 | sub MARK_REDRAW (){ 0x8000 } |
| 77 | |
79 | |
| 78 | sub COLOUR_BLACK (){ 0 } |
|
|
| 79 | sub COLOUR_WHITE (){ 1 } |
80 | sub COLOUR_WHITE (){ 0 } |
|
|
81 | sub COLOUR_BLACK (){ 1 } |
| 80 | |
82 | |
| 81 | sub MOVE_PASS (){ undef } |
83 | sub MOVE_PASS (){ undef } |
| 82 | sub MOVE_HANDICAP (){ -2 } |
84 | sub MOVE_HANDICAP (){ -2 } |
| 83 | |
85 | |
| 84 | =item my $board = new $size |
86 | =item my $board = new $size |
| … | |
… | |
| 87 | |
89 | |
| 88 | C<< $board->{size} >> stores the board size. |
90 | C<< $board->{size} >> stores the board size. |
| 89 | |
91 | |
| 90 | C<< $board->{max} >> stores the maximum board coordinate (size-1). |
92 | C<< $board->{max} >> stores the maximum board coordinate (size-1). |
| 91 | |
93 | |
| 92 | C<< $board->{captures}[COLOUR] >> stores the number of captured stones for |
94 | C<< $board->{captures}[COLOUR_xxx] >> stores the number of captured stones for |
| 93 | the given colour. |
95 | the given colour. |
| 94 | |
|
|
| 95 | C<< $board->{last} >> stores the colour of the last move that was played. |
|
|
| 96 | |
96 | |
| 97 | C<< $board->{board} >> stores a two-dimensional array with board contents. |
97 | C<< $board->{board} >> stores a two-dimensional array with board contents. |
| 98 | |
98 | |
| 99 | =cut |
99 | =cut |
| 100 | |
100 | |
| 101 | sub new { |
101 | sub new { |
| 102 | my $class = shift; |
102 | my $class = shift; |
| 103 | my $size = shift; |
103 | my $size = shift; |
|
|
104 | |
|
|
105 | unless ($size > 0) { |
|
|
106 | Carp::croak ("no board size given!"); |
|
|
107 | } |
|
|
108 | |
| 104 | bless { |
109 | bless { |
| 105 | max => $size - 1, |
110 | max => $size - 1, |
| 106 | size => $size, |
111 | size => $size, |
| 107 | board => [map [(0) x $size], 1 .. $size], |
112 | board => [map [(0) x $size], 1 .. $size], |
| 108 | captures => [0, 0], # captures |
113 | captures => [0, 0], # captures |
| 109 | #timer => [], |
114 | #timer => [], |
| 110 | #score => [], |
115 | #score => [], |
| 111 | #last => COLOUR_..., |
|
|
| 112 | @_ |
|
|
| 113 | }, |
116 | @_, |
| 114 | $class; |
117 | }, $class |
| 115 | } |
118 | } |
| 116 | |
119 | |
| 117 | # inefficient and primitive, I hear you say? |
120 | # inefficient and primitive, I hear you say? |
| 118 | # well... you are right :) |
121 | # well... you are right :) |
| 119 | # use an extremely dumb floodfill algorithm to get rid of captured stones |
122 | # use an extremely dumb floodfill algorithm to get rid of captured stones |
| … | |
… | |
| 149 | =item $hint = $board->update ([update-structures...]) |
152 | =item $hint = $board->update ([update-structures...]) |
| 150 | |
153 | |
| 151 | Each update-structure itself is also an array-ref: |
154 | Each update-structure itself is also an array-ref: |
| 152 | |
155 | |
| 153 | [$x, $y, $clr, $set, $label, $hint] # update or move |
156 | [$x, $y, $clr, $set, $label, $hint] # update or move |
| 154 | [MOVE_HANDICAP, $handicap] # black move, set handicap |
157 | [MOVE_HANDICAP, $handicap] # black move, setup handicap |
| 155 | [MOVE_PASS] # pass |
158 | [MOVE_PASS] # pass |
| 156 | [] # also pass |
159 | [] # also pass (deprecated!) |
| 157 | |
160 | |
| 158 | It changes the board or executes a move, by first clearing the bits |
161 | It changes the board or executes a move, by first clearing the bits |
| 159 | specified in C<$clr>, then setting bits specified in C<$set>. |
162 | specified in C<$clr>, then setting bits specified in C<$set>. |
| 160 | |
163 | |
| 161 | If C<$set> includes C<MARK_LABEL>, the label text must be given in |
164 | If C<$set> includes C<MARK_LABEL>, the label text must be given in |
| 162 | C<$label>. |
165 | C<$label>. |
| 163 | |
166 | |
| 164 | If C<$set> contains C<MARK_MOVE>, then a circle symbol will be placed on |
167 | If C<$set> contains C<MARK_MOVE> then surrounded stones will be removed |
| 165 | this coordinate only if this is the last move done (which is useful for a |
168 | from the board and (simple) Kos are detected and marked with square |
| 166 | move marker). |
169 | symbols and C<MARK_KO>, after removing other marking symbols. The |
|
|
170 | markings are also removed with the next next update structure that uses |
|
|
171 | C<MARK_MOVE>, so this flag is suited well for marking, well, moves. Note |
|
|
172 | that you can make invalid "moves" (such as suicide) and C<update> will |
|
|
173 | try to cope with it. You can use C<is_valid_move> to avoid making illegal |
|
|
174 | moves. |
| 167 | |
175 | |
| 168 | For handicap "moves", currently only board sizes 9, 13 and 19 are |
176 | For handicap "moves", currently only board sizes 9, 13 and 19 are |
| 169 | supported and only handicap values from 2 to 9. The placement follows the |
177 | supported and only handicap values from 2 to 9. The placement follows the |
| 170 | IGS rules, if you want other placements, you have to set it up yourself. |
178 | IGS rules, if you want other placements, you have to set it up yourself. |
| 171 | |
179 | |
| 172 | This function modifies the hint member of the specified path to speed up |
180 | This function modifies the C<$hint> member of the specified structure |
| 173 | repeated board generation and updates with the same update structures. |
181 | to speed up repeated board generation and updates with the same update |
|
|
182 | structures. |
| 174 | |
183 | |
| 175 | If the hint member is a reference the scalar pointed to by the reference |
184 | If the hint member is a reference the scalar pointed to by the reference |
| 176 | is updated instead. |
185 | is updated instead. |
| 177 | |
186 | |
| 178 | If all this hint member thing is unclear, just ignore it and specify it |
187 | If all this hint member thing is confusing, just ignore it and specify |
| 179 | as C<undef> or leave it out of the array entirely. Do make sure that you |
188 | it as C<undef> or leave it out of the array entirely. Do make sure that |
| 180 | keep your update structures around, however, as regenerating a full board |
189 | you keep your update structures around as long as previous updates don't |
| 181 | position from hinted update structures is I<much> faster then recreating |
190 | change, however, as regenerating a full board position from hinted |
| 182 | it from fresh update structures. |
191 | update structures is I<much> faster then recreating it from fresh update |
|
|
192 | structures. |
| 183 | |
193 | |
| 184 | Example, make two silly moves: |
194 | Example, make two silly moves: |
| 185 | |
195 | |
| 186 | $board->update ([[0, 18, -1, MARK_B|MARK_MOVE], |
196 | $board->update ([[0, 18, -1, MARK_B | MARK_MOVE], |
| 187 | [0, 17, -1, MARK_W|MARK_MOVE]]); |
197 | [0, 17, -1, MARK_W | MARK_MOVE]]); |
| 188 | |
198 | |
| 189 | =cut |
199 | =cut |
| 190 | |
200 | |
| 191 | our %HANDICAP_COORD = ( |
201 | our %HANDICAP_COORD = ( |
| 192 | 9 => [2, 4, 6], |
202 | 9 => [2, 4, 6], |
| 193 | 13 => [3, 6, 9], |
203 | 13 => [3, 6, 9], |
| 194 | 19 => [3, 9, 15], |
204 | 19 => [3, 9, 15], |
| 195 | ); |
205 | ); |
| 196 | our %HANDICAP_XY = ( |
206 | our %HANDICAP_XY = ( |
| 197 | 2 => [qw(0,2 2,0 )], |
207 | 2 => [qw(0,2 2,0 )], |
| 198 | 3 => [qw(0,2 2,0 2,2 )], |
208 | 3 => [qw(0,2 2,0 0,0 )], |
| 199 | 4 => [qw(0,2 2,0 2,2 0,0 )], |
209 | 4 => [qw(0,2 2,0 0,0 2,2 )], |
| 200 | 5 => [qw(0,2 2,0 2,2 0,0 1,1)], |
210 | 5 => [qw(0,2 2,0 0,0 2,2 1,1)], |
| 201 | 6 => [qw(0,2 2,0 2,2 0,0 0,1 2,1 )], |
211 | 6 => [qw(0,2 2,0 0,0 2,2 0,1 2,1 )], |
| 202 | 7 => [qw(0,2 2,0 2,2 0,0 0,1 2,1 1,1)], |
212 | 7 => [qw(0,2 2,0 0,0 2,2 0,1 2,1 1,1)], |
| 203 | 8 => [qw(0,2 2,0 2,2 0,0 0,1 2,1 1,0 1,2 )], |
213 | 8 => [qw(0,2 2,0 0,0 2,2 0,1 2,1 1,0 1,2 )], |
| 204 | 9 => [qw(0,2 2,0 2,2 0,0 0,1 2,1 1,0 1,2 1,1)], |
214 | 9 => [qw(0,2 2,0 0,0 2,2 0,1 2,1 1,0 1,2 1,1)], |
| 205 | ); |
215 | ); |
|
|
216 | |
|
|
217 | our $mark_symbols = MARK_CIRCLE | MARK_SQUARE | MARK_TRIANGLE | MARK_CROSS | MARK_KO; |
| 206 | |
218 | |
| 207 | sub update { |
219 | sub update { |
| 208 | my ($self, $path) = @_; |
220 | my ($self, $path) = @_; |
| 209 | |
221 | |
| 210 | my $board = $self->{board}; |
222 | my $board = $self->{board}; |
| 211 | |
223 | |
| 212 | for (@$path) { |
224 | for (@$path) { |
| 213 | my ($x, $y, $clr, $set, $label) = @$_; |
225 | my ($x, $y, $clr, $set, $label) = @$_; |
| 214 | |
226 | |
| 215 | my $nodemask = |
|
|
| 216 | $_ == $path->[-1] |
|
|
| 217 | ? ~0 |
|
|
| 218 | : ~(MARK_SQUARE | MARK_TRIANGLE | MARK_CIRCLE | MARK_LABEL | MARK_KO); |
|
|
| 219 | |
|
|
| 220 | if (!defined $x) { |
227 | if (!defined $x) { |
|
|
228 | $$_ &= ~$mark_symbols for @{ delete $self->{unmark} || [] }; |
| 221 | # pass |
229 | # pass |
| 222 | $self->{last} = $set & MARK_B ? COLOUR_BLACK : COLOUR_WHITE; |
|
|
| 223 | |
230 | |
| 224 | } elsif ($x == MOVE_HANDICAP) { |
231 | } elsif ($x == MOVE_HANDICAP) { |
|
|
232 | $$_ &= ~$mark_symbols for @{ delete $self->{unmark} || [] }; |
|
|
233 | |
| 225 | # $y = #handicap stones |
234 | # $y = #handicap stones |
| 226 | my $c = $HANDICAP_COORD{$self->{size}} |
235 | my $c = $HANDICAP_COORD{$self->{size}} |
| 227 | or Carp::croak "$self->{size}: illegal board size for handicap"; |
236 | or Carp::croak "$self->{size}: illegal board size for handicap"; |
| 228 | my $h = $HANDICAP_XY{$y} |
237 | my $h = $HANDICAP_XY{$y} |
| 229 | or Carp::croak "$y: illegal number of handicap stones"; |
238 | or Carp::croak "$y: illegal number of handicap stones"; |
| … | |
… | |
| 232 | my ($x, $y) = map $c->[$_], split /,/; |
241 | my ($x, $y) = map $c->[$_], split /,/; |
| 233 | $board->[$x][$y] = MARK_B | MARK_MOVE; |
242 | $board->[$x][$y] = MARK_B | MARK_MOVE; |
| 234 | } |
243 | } |
| 235 | |
244 | |
| 236 | } else { |
245 | } else { |
| 237 | $board->[$x][$y] = |
246 | my $space = \$board->[$x][$y]; |
| 238 | $board->[$x][$y] |
247 | |
| 239 | & ~$clr |
248 | $$space = $$space & ~$clr | $set; |
| 240 | | $set |
|
|
| 241 | & $nodemask; |
|
|
| 242 | |
249 | |
| 243 | $self->{label}[$x][$y] = $label if $set & MARK_LABEL; |
250 | $self->{label}[$x][$y] = $label if $set & MARK_LABEL; |
| 244 | |
251 | |
| 245 | if ($set & MARK_MOVE) { |
252 | if ($set & MARK_MOVE) { |
| 246 | $self->{last} = $set & MARK_B ? COLOUR_BLACK : COLOUR_WHITE; |
253 | $$_ &= ~$mark_symbols for @{ $self->{unmark} || [] }; |
|
|
254 | @{ $self->{unmark} } = $space; |
| 247 | |
255 | |
| 248 | unless (${ $_->[5] ||= \my $hint }) { |
256 | unless (${ $_->[5] ||= \my $hint }) { |
| 249 | my ($own, $opp) = |
257 | my ($own, $opp) = |
| 250 | $set & MARK_B |
258 | $set & MARK_B |
| 251 | ? (MARK_B, MARK_W) |
259 | ? (MARK_B, MARK_W) |
| … | |
… | |
| 260 | |
268 | |
| 261 | # keep only unique coordinates |
269 | # keep only unique coordinates |
| 262 | @capture = do { my %seen; grep !$seen{"$_->[0],$_->[1]"}++, @capture }; |
270 | @capture = do { my %seen; grep !$seen{"$_->[0],$_->[1]"}++, @capture }; |
| 263 | |
271 | |
| 264 | # remove captured stones |
272 | # remove captured stones |
| 265 | $self->{captures}[$self->{last}] += @capture; |
273 | $self->{captures}[$own == MARK_B ? COLOUR_BLACK : COLOUR_WHITE] += @capture; |
| 266 | $self->{board}[$_->[0]][$_->[1]] &= ~(MARK_B | MARK_W | MARK_MOVE) |
274 | $self->{board}[$_->[0]][$_->[1]] = 0 |
| 267 | for @capture; |
275 | for @capture; |
| 268 | |
276 | |
| 269 | $suicide += $self->capture ($own, $x, $y); |
277 | $suicide += $self->capture ($own, $x, $y); |
| 270 | |
278 | |
| 271 | ${ $_->[5] } ||= !(@capture || $suicide); |
279 | ${ $_->[5] } ||= !(@capture || $suicide); |
| 272 | |
280 | |
|
|
281 | if ($suicide) { |
|
|
282 | $self->{board}[$x][$y] = 0 |
|
|
283 | |
| 273 | if (!$suicide && @capture == 1) { |
284 | } elsif (!$suicide && @capture == 1) { |
| 274 | # possible ko. now check liberties on placed stone |
285 | # possible ko. now check liberties on placed stone |
| 275 | |
286 | |
| 276 | my $libs; |
287 | my $libs; |
| 277 | |
288 | |
| 278 | $libs++ if $x > 0 && !($board->[$x-1][$y] & $opp); |
289 | $libs++ if $x > 0 && !($board->[$x-1][$y] & $opp); |
| 279 | $libs++ if $x < $self->{max} && !($board->[$x+1][$y] & $opp); |
290 | $libs++ if $x < $self->{max} && !($board->[$x+1][$y] & $opp); |
| 280 | $libs++ if $y > 0 && !($board->[$x][$y-1] & $opp); |
291 | $libs++ if $y > 0 && !($board->[$x][$y-1] & $opp); |
| 281 | $libs++ if $y < $self->{max} && !($board->[$x][$y+1] & $opp); |
292 | $libs++ if $y < $self->{max} && !($board->[$x][$y+1] & $opp); |
| 282 | |
293 | |
| 283 | if ($libs == 1) { |
294 | if ($libs == 1) { |
| 284 | $board->[$x][$y] = $board->[$x][$y] & ~MARK_CIRCLE | (MARK_KO & $nodemask); |
295 | $$space = $$space & ~$mark_symbols | MARK_KO; |
|
|
296 | |
| 285 | ($x, $y) = @{$capture[0]}; |
297 | ($x, $y) = @{$capture[0]}; |
| 286 | $board->[$x][$y] |= MARK_KO & $nodemask; |
298 | $board->[$x][$y] |= MARK_KO; |
|
|
299 | |
|
|
300 | push @{ $self->{unmark} }, \$board->[$x][$y]; |
| 287 | } |
301 | } |
| 288 | } |
302 | } |
| 289 | } |
303 | } |
| 290 | } |
304 | } |
| 291 | } |
305 | } |
| … | |
… | |
| 293 | } |
307 | } |
| 294 | |
308 | |
| 295 | =item $board->is_valid_move ($colour, $x, $y[, $may_suicide]) |
309 | =item $board->is_valid_move ($colour, $x, $y[, $may_suicide]) |
| 296 | |
310 | |
| 297 | Returns true if the move of the given colour on the given coordinates is |
311 | Returns true if the move of the given colour on the given coordinates is |
| 298 | valid or not. |
312 | valid or not. Kos are taken into account as long as they are marked with |
|
|
313 | C<MARK_KO>. Suicides are invalid unless C<$may_suicide> is true (e.g. for |
|
|
314 | new zealand rules) |
| 299 | |
315 | |
| 300 | =cut |
316 | =cut |
| 301 | |
317 | |
| 302 | sub is_valid_move { |
318 | sub is_valid_move { |
| 303 | my ($self, $colour, $x, $y, $may_suicide) = @_; |
319 | my ($self, $colour, $x, $y, $may_suicide) = @_; |
| 304 | |
320 | |
| 305 | my $board = $self->{board}; |
321 | my $board = $self->{board}; |
| 306 | |
322 | |
| 307 | return if $board->[$x][$y] & (MARK_B | MARK_W | MARK_KO); |
323 | return if $board->[$x][$y] & (MARK_B | MARK_W | MARK_KO) |
|
|
324 | && !($board->[$x][$y] & MARK_GRAYED); |
| 308 | |
325 | |
| 309 | if ($may_suicide) { |
326 | if ($may_suicide) { |
| 310 | return 1; |
327 | return 1; |
| 311 | } else { |
328 | } else { |
| 312 | my ($own, $opp) = $colour == COLOUR_BLACK |
329 | my ($own, $opp) = $colour == COLOUR_BLACK |
