1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
|
/*
GNUGO - the game of Go (Wei-Chi)
Version 1.2 last revised 10-31-95
Copyright (C) Free Software Foundation, Inc.
written by Man L. Li
modified by Wayne Iba
modified by Frank Pursel <fpp%minor.UUCP@dragon.com>
documented by Bob Webber
*/
/*
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation - version 2.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License in file COPYING for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
Please report any bug/fix, modification, suggestion to
manli@cs.uh.edu
*/
/*-----------------------------------
matchpat.c -- Match pattern moves
-----------------------------------*/
#include "gnugo.h"
#include "patterns.h"
#define abs(x) ((x) < 0 ? -(x) : (x))
#define line(x) (abs(x - 9))
extern unsigned char p[19][19]; /* go board */
extern int mymove, umove; /* computer color, opponent color */
extern int lib; /* current stone liberty */
int matchpat(int m, /* row origin */
int n, /* column origin */
int *i, /* row number of next move */
int *j, /* column number of next move */
int *val) /* next move value */
/* match pattern and get next move */
{
/* transformation matrice */
static int trf [8][2][2] = {
{{1, 0}, {0, 1}}, /* linear transfomation matrix */
{{1, 0}, {0, -1}}, /* invert */
{{0, 1}, {-1, 0}}, /* rotate 90 */
{{0, -1}, {-1, 0}}, /* rotate 90 and invert */
{{-1, 0}, {0, 1}}, /* flip left */
{{-1, 0}, {0, -1}}, /* flip left and invert */
{{0, 1}, {1, 0}}, /* rotate 90 and flip left */
{{0, -1}, {1, 0}} /* rotate 90, flip left and invert */
};
int k, my, nx, ll, r, cont;
int ti, tj, tval;
*i = -1; *j = -1; *val = -1;
for (r = 0; r < PATNO; r++)
/* try each pattern */
for (ll = 0; ll < pat[r].trfno; ll++)
/* try each orientation transformation */
{
k = 0; cont = 1;
while ((k != pat[r].patlen) && cont)
/* match each point */
{
/* transform pattern real coordinate */
nx = n + trf[ll][0][0] * pat[r].patn[k].x
+ trf[ll][0][1] * pat[r].patn[k].y;
my = m + trf[ll][1][0] * pat[r].patn[k].x
+ trf[ll][1][1] * pat[r].patn[k].y;
/* outside the board */
if ((my < 0) || ( my > 18) || (nx < 0) || (nx > 18))
{
cont = 0;
break;
}
switch (pat[r].patn[k].att) {
case 0 : if (p[my][nx] == EMPTY) /* open */
break;
else
{
cont = 0;
break;
}
case 1 : if (p[my][nx] == umove) /* your piece */
break;
else
{
cont = 0;
break;
}
case 2 : if (p[my][nx] == mymove) /* my piece */
break;
else
{
cont = 0;
break;
}
case 3 : if (p[my][nx] == EMPTY) /* open for new move */
{
lib = 0;
countlib(my, nx, mymove); /* check liberty */
if (lib > 1) /* move o.k. */
{
ti = my;
tj = nx;
break;
}
else
{
cont = 0;
break;
}
}
else
{
cont = 0;
break;
}
case 4 : if ((p[my][nx] == EMPTY) /* open on edge */
&& ((my == 0) || (my == 18) || (nx == 0) || (nx == 18)))
break;
else
{
cont = 0;
break;
}
case 5 : if ((p[my][nx] == umove) /* your piece on edge */
&& ((my == 0) || (my == 18) || (nx == 0) || (nx == 18)))
break;
else
{
cont = 0;
break;
}
case 6 : if ((p[my][nx] == mymove) /* my piece on edge */
&& ((my == 0) || (my == 18) || (nx == 0) || (nx == 18)))
break;
else
{
cont = 0;
break;
}
}
++k;
}
if (cont) /* match pattern */
{
tval = pat[r].patwt;
if ((r >= 8) && (r <= 13)) /* patterns for expand region */
{
if (line(ti) > 7) /* penalty on line 1, 2 */
tval--;
else
if ((line(ti) == 6) || (line(ti) == 7))
tval++; /* reward on line 3, 4 */
if (line(tj) > 7) /* penalty on line 1, 2 */
tval--;
else
if ((line(tj) == 6) || (line(tj) == 7))
tval++; /* reward on line 3, 4 */
}
if (tval > *val)
{
*val = tval;
*i = ti;
*j = tj;
}
}
}
if (*val > 0) /* pattern matched */
return 1;
else /* match failed */
return 0;
} /* end matchpat */
|
