| 1 | |
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| 2 | /* generate a rogue/nethack-like layout */ |
1 | /* generate a rogue/nethack-like layout */ |
| 3 | #include <global.h> |
2 | #include <global.h> |
| 4 | #include <random_map.h> |
3 | #include <random_map.h> |
| 5 | #include <math.h> |
4 | #include <rproto.h> |
| 6 | |
5 | |
| 7 | typedef struct |
6 | typedef struct |
| 8 | { |
7 | { |
| 9 | int x; |
8 | int x; |
| 10 | int y; /* coordinates of room centers */ |
9 | int y; /* coordinates of room centers */ |
| … | |
… | |
| 14 | int ax, ay, zx, zy; /* coordinates of extrema of the rectangle */ |
13 | int ax, ay, zx, zy; /* coordinates of extrema of the rectangle */ |
| 15 | |
14 | |
| 16 | int rtype; /* circle or rectangular */ |
15 | int rtype; /* circle or rectangular */ |
| 17 | } Room; |
16 | } Room; |
| 18 | |
17 | |
| 19 | static int roguelike_place_room (Room * Rooms, int xsize, int ysize, int nrooms); |
18 | static int roguelike_place_room (Room *rooms, int xsize, int ysize, int nrooms); |
| 20 | static void roguelike_make_rooms (Room * Rooms, char **maze, int options); |
19 | static void roguelike_make_rooms (Room *rooms, char **maze, int options); |
| 21 | static void roguelike_link_rooms (Room * Rooms, char **maze, int xsize, int ysize); |
20 | static void roguelike_link_rooms (Room *rooms, char **maze, int xsize, int ysize); |
| 22 | |
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| 23 | |
21 | |
| 24 | int |
22 | int |
| 25 | surround_check (char **layout, int i, int j, int Xsize, int Ysize) |
23 | surround_check (char **layout, int i, int j, int Xsize, int Ysize) |
| 26 | { |
24 | { |
| 27 | /* 1 = wall to left, |
25 | /* 1 = wall to left, |
| 28 | 2 = wall to right, |
26 | 2 = wall to right, |
| 29 | 4 = wall above |
27 | 4 = wall above |
| 30 | 8 = wall below */ |
28 | 8 = wall below */ |
| 31 | int surround_index = 0; |
29 | int surround_index = 0; |
| 32 | |
30 | |
| 33 | if ((i > 0) && (layout[i - 1][j] != 0 && layout[i - 1][j] != '.')) |
31 | if ((i > 0) && (layout[i - 1][j] != 0 && layout[i - 1][j] != '.')) surround_index |= 1; |
| 34 | surround_index += 1; |
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| 35 | if ((i < Xsize - 1) && (layout[i + 1][j] != 0 && layout[i + 1][j] != '.')) |
32 | if ((i < Xsize - 1) && (layout[i + 1][j] != 0 && layout[i + 1][j] != '.')) surround_index |= 2; |
| 36 | surround_index += 2; |
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| 37 | if ((j > 0) && (layout[i][j - 1] != 0 && layout[i][j - 1] != '.')) |
33 | if ((j > 0) && (layout[i][j - 1] != 0 && layout[i][j - 1] != '.')) surround_index |= 4; |
| 38 | surround_index += 4; |
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| 39 | if ((j < Ysize - 1) && (layout[i][j + 1] != 0 && layout[i][j + 1] != '.')) |
34 | if ((j < Ysize - 1) && (layout[i][j + 1] != 0 && layout[i][j + 1] != '.')) surround_index |= 8; |
| 40 | surround_index += 8; |
35 | |
| 41 | return surround_index; |
36 | return surround_index; |
| 42 | } |
37 | } |
| 43 | |
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| 44 | |
38 | |
| 45 | /* actually make the layout: we work by a reduction process: |
39 | /* actually make the layout: we work by a reduction process: |
| 46 | * first we make everything a wall, then we remove areas to make rooms |
40 | * first we make everything a wall, then we remove areas to make rooms |
| 47 | */ |
41 | */ |
| 48 | |
42 | void |
| 49 | char ** |
43 | roguelike_layout_gen (Layout maze, int options) |
| 50 | roguelike_layout_gen (int xsize, int ysize, int options) |
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| 51 | { |
44 | { |
| 52 | int i, j; |
45 | int i, j; |
| 53 | Room *Rooms = 0; |
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| 54 | Room *walk; |
46 | Room *walk; |
| 55 | int nrooms = 0; |
47 | int nrooms = 0; |
| 56 | int tries = 0; |
48 | int tries = 0; |
| 57 | |
49 | |
| 58 | /* allocate that array, write walls everywhere up */ |
50 | int xsize = maze->w; |
| 59 | char **maze = (char **) malloc (sizeof (char *) * xsize); |
51 | int ysize = maze->h; |
| 60 | |
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| 61 | for (i = 0; i < xsize; i++) |
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| 62 | { |
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| 63 | maze[i] = (char *) malloc (sizeof (char) * ysize); |
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| 64 | for (j = 0; j < ysize; j++) |
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| 65 | maze[i][j] = '#'; |
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| 66 | } |
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| 67 | |
52 | |
| 68 | /* minimum room size is basically 5x5: if xsize/ysize is |
53 | /* minimum room size is basically 5x5: if xsize/ysize is |
| 69 | less than 3x that then hollow things out, stick in |
54 | less than 3x that then hollow things out, stick in |
| 70 | a stairsup and stairs down, and exit */ |
55 | a stairsup and stairs down, and exit */ |
| 71 | |
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| 72 | if (xsize < 11 || ysize < 11) |
56 | if (xsize < 11 || ysize < 11) |
| 73 | { |
57 | { |
| 74 | for (i = 1; i < xsize - 1; i++) |
58 | maze->clear (); |
| 75 | for (j = 1; j < ysize - 1; j++) |
59 | maze->border (); |
| 76 | maze[i][j] = 0; |
60 | |
| 77 | maze[(xsize - 1) / 2][(ysize - 1) / 2] = '>'; |
61 | maze[(xsize - 1) / 2][(ysize - 1) / 2 ] = '>'; |
| 78 | maze[(xsize - 1) / 2][(ysize - 1) / 2 + 1] = '<'; |
62 | maze[(xsize - 1) / 2][(ysize - 1) / 2 + 1] = '<'; |
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63 | |
| 79 | return maze; |
64 | return; |
| 80 | } |
65 | } |
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66 | |
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67 | maze->clear ('#'); |
| 81 | |
68 | |
| 82 | /* decide on the number of rooms */ |
69 | /* decide on the number of rooms */ |
| 83 | nrooms = rndm (10) + 6; |
70 | nrooms = rmg_rndm (10) + 6; |
| 84 | Rooms = (Room *) calloc (nrooms + 1, sizeof (Room)); |
71 | Room *rooms = salloc0<Room> (nrooms + 1); |
| 85 | |
72 | |
| 86 | /* actually place the rooms */ |
73 | /* actually place the rooms */ |
| 87 | i = 0; |
74 | i = 0; |
| 88 | while (tries < 450 && i < nrooms) |
75 | while (tries < 450 && i < nrooms) |
| 89 | { |
76 | { |
| 90 | /* try to place the room */ |
77 | /* try to place the room */ |
| 91 | if (!roguelike_place_room (Rooms, xsize, ysize, nrooms)) |
78 | if (!roguelike_place_room (rooms, xsize, ysize, nrooms)) |
| 92 | tries++; |
79 | tries++; |
| 93 | else |
80 | else |
| 94 | i++; |
81 | i++; |
| 95 | } |
82 | } |
| 96 | |
83 | |
| 97 | if (i == 0) |
84 | if (i == 0) /* no can do! */ |
| 98 | { /* no can do! */ |
85 | { |
| 99 | for (i = 1; i < xsize - 1; i++) |
86 | maze->clear (); |
| 100 | for (j = 1; j < ysize - 1; j++) |
87 | maze->border (); |
| 101 | maze[i][j] = 0; |
88 | |
| 102 | maze[(xsize - 1) / 2][(ysize - 1) / 2] = '>'; |
89 | maze [(xsize - 1) / 2][(ysize - 1) / 2 ] = '>'; |
| 103 | maze[(xsize - 1) / 2][(ysize - 1) / 2 + 1] = '<'; |
90 | maze [(xsize - 1) / 2][(ysize - 1) / 2 + 1] = '<'; |
| 104 | free (Rooms); |
91 | |
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92 | sfree (rooms, nrooms + 1); |
| 105 | return maze; |
93 | return; |
| 106 | } |
94 | } |
| 107 | |
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| 108 | |
95 | |
| 109 | /* erase the areas occupied by the rooms */ |
96 | /* erase the areas occupied by the rooms */ |
| 110 | roguelike_make_rooms (Rooms, maze, options); |
97 | roguelike_make_rooms (rooms, maze, options); |
| 111 | |
98 | |
| 112 | roguelike_link_rooms (Rooms, maze, xsize, ysize); |
99 | roguelike_link_rooms (rooms, maze, xsize, ysize); |
| 113 | |
100 | |
| 114 | /* put in the stairs */ |
101 | /* put in the stairs */ |
| 115 | |
102 | |
| 116 | maze[Rooms->x][Rooms->y] = '<'; |
103 | maze[rooms->x][rooms->y] = '<'; |
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104 | |
| 117 | /* get the last one */ |
105 | /* get the last one */ |
| 118 | for (walk = Rooms; walk->x != 0; walk++); |
106 | for (walk = rooms; walk->x != 0; walk++) |
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107 | ; |
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108 | |
| 119 | /* back up one */ |
109 | /* back up one */ |
| 120 | walk--; |
110 | walk--; |
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111 | |
| 121 | if (walk == Rooms) |
112 | if (walk == rooms) |
| 122 | { |
113 | { |
| 123 | /* In this case, there is only a single room. We don't want to |
114 | /* In this case, there is only a single room. We don't want to |
| 124 | * clobber are up exit (above) with a down exit, so put the |
115 | * clobber are up exit (above) with a down exit, so put the |
| 125 | * other exit one space up/down, depending which is a space |
116 | * other exit one space up/down, depending which is a space |
| 126 | * and not a wall. |
117 | * and not a wall. |
| … | |
… | |
| 137 | for (i = 0; i < xsize; i++) |
128 | for (i = 0; i < xsize; i++) |
| 138 | for (j = 0; j < ysize; j++) |
129 | for (j = 0; j < ysize; j++) |
| 139 | { |
130 | { |
| 140 | if (maze[i][j] == '.') |
131 | if (maze[i][j] == '.') |
| 141 | maze[i][j] = 0; |
132 | maze[i][j] = 0; |
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133 | |
| 142 | if (maze[i][j] == 'D') |
134 | if (maze[i][j] == 'D') |
| 143 | { /* remove bad door. */ |
135 | { /* remove bad door. */ |
| 144 | int si = surround_check (maze, i, j, xsize, ysize); |
136 | int si = surround_check (maze, i, j, xsize, ysize); |
| 145 | |
137 | |
| 146 | if (si != 3 && si != 12) |
138 | if (si != 3 && si != 12) |
| … | |
… | |
| 151 | j = 0; |
143 | j = 0; |
| 152 | } |
144 | } |
| 153 | } |
145 | } |
| 154 | } |
146 | } |
| 155 | |
147 | |
| 156 | free (Rooms); |
148 | sfree (rooms, nrooms + 1); |
| 157 | return maze; |
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| 158 | } |
149 | } |
| 159 | |
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| 160 | |
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| 161 | |
150 | |
| 162 | static int |
151 | static int |
| 163 | roguelike_place_room (Room * Rooms, int xsize, int ysize, int nrooms) |
152 | roguelike_place_room (Room *rooms, int xsize, int ysize, int nrooms) |
| 164 | { |
153 | { |
| 165 | |
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| 166 | int tx, ty; /* trial center locations */ |
154 | int tx, ty; /* trial center locations */ |
| 167 | int sx, sy; /* trial sizes */ |
155 | int sx, sy; /* trial sizes */ |
| 168 | int ax, ay; /* min coords of rect */ |
156 | int ax, ay; /* min coords of rect */ |
| 169 | int zx, zy; /* max coords of rect */ |
157 | int zx, zy; /* max coords of rect */ |
| 170 | int x_basesize; |
158 | int x_basesize; |
| 171 | int y_basesize; |
159 | int y_basesize; |
| 172 | Room *walk; |
160 | Room *walk; |
| 173 | |
161 | |
| 174 | /* decide on the base x and y sizes */ |
162 | /* decide on the base x and y sizes */ |
| 175 | |
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| 176 | x_basesize = xsize / isqrt (nrooms); |
163 | x_basesize = xsize / isqrt (nrooms); |
| 177 | y_basesize = ysize / isqrt (nrooms); |
164 | y_basesize = ysize / isqrt (nrooms); |
| 178 | |
165 | |
| 179 | |
166 | tx = rmg_rndm (xsize); |
| 180 | tx = RANDOM () % xsize; |
167 | ty = rmg_rndm (ysize); |
| 181 | ty = RANDOM () % ysize; |
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| 182 | |
168 | |
| 183 | /* generate a distribution of sizes centered about basesize */ |
169 | /* generate a distribution of sizes centered about basesize */ |
| 184 | sx = (RANDOM () % x_basesize) + (RANDOM () % x_basesize) + (RANDOM () % x_basesize); |
170 | sx = rmg_rndm (x_basesize) + rmg_rndm (x_basesize) + rmg_rndm (x_basesize); |
| 185 | sy = (RANDOM () % y_basesize) + (RANDOM () % y_basesize) + (RANDOM () % y_basesize); |
171 | sy = rmg_rndm (y_basesize) + rmg_rndm (y_basesize) + rmg_rndm (y_basesize); |
| 186 | sy = (int) (sy * .5); /* renormalize */ |
172 | sy = (int) (sy * .5); /* renormalize */ |
| 187 | |
173 | |
| 188 | /* find the corners */ |
174 | /* find the corners */ |
| 189 | ax = tx - sx / 2; |
175 | ax = tx - sx / 2; |
| 190 | zx = tx + sx / 2 + sx % 2; |
176 | zx = tx + sx / 2 + sx % 2; |
| 191 | |
177 | |
| 192 | ay = ty - sy / 2; |
178 | ay = ty - sy / 2; |
| 193 | zy = ty + sy / 2 + sy % 2; |
179 | zy = ty + sy / 2 + sy % 2; |
| 194 | |
180 | |
| 195 | /* check to see if it's in the map */ |
181 | /* check to see if it's in the map */ |
| 196 | if (zx > xsize - 1 || ax < 1) |
182 | if (zx > xsize - 1 || ax < 1) return 0; |
| 197 | return 0; |
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| 198 | if (zy > ysize - 1 || ay < 1) |
183 | if (zy > ysize - 1 || ay < 1) return 0; |
| 199 | return 0; |
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| 200 | |
184 | |
| 201 | /* no small fish */ |
185 | /* no small fish */ |
| 202 | if (sx < 3 || sy < 3) |
186 | if (sx < 3 || sy < 3) |
| 203 | return 0; |
187 | return 0; |
| 204 | |
188 | |
| 205 | /* check overlap with existing rooms */ |
189 | /* check overlap with existing rooms */ |
| 206 | for (walk = Rooms; walk->x != 0; walk++) |
190 | for (walk = rooms; walk->x != 0; walk++) |
| 207 | { |
191 | { |
| 208 | int dx = abs (tx - walk->x); |
192 | int dx = abs (tx - walk->x); |
| 209 | int dy = abs (ty - walk->y); |
193 | int dy = abs (ty - walk->y); |
| 210 | |
194 | |
| 211 | if ((dx < (walk->sx + sx) / 2 + 2) && (dy < (walk->sy + sy) / 2 + 2)) |
195 | if ((dx < (walk->sx + sx) / 2 + 2) && (dy < (walk->sy + sy) / 2 + 2)) |
| … | |
… | |
| 213 | } |
197 | } |
| 214 | |
198 | |
| 215 | /* if we've got here, presumably the room is OK. */ |
199 | /* if we've got here, presumably the room is OK. */ |
| 216 | |
200 | |
| 217 | /* get a pointer to the first free room */ |
201 | /* get a pointer to the first free room */ |
| 218 | for (walk = Rooms; walk->x != 0; walk++); |
202 | for (walk = rooms; walk->x != 0; walk++) |
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203 | ; |
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204 | |
| 219 | walk->x = tx; |
205 | walk->x = tx; |
| 220 | walk->y = ty; |
206 | walk->y = ty; |
| 221 | walk->sx = sx; |
207 | walk->sx = sx; |
| 222 | walk->sy = sy; |
208 | walk->sy = sy; |
| 223 | walk->ax = ax; |
209 | walk->ax = ax; |
| 224 | walk->ay = ay; |
210 | walk->ay = ay; |
| 225 | walk->zx = zx; |
211 | walk->zx = zx; |
| 226 | walk->zy = zy; |
212 | walk->zy = zy; |
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213 | |
| 227 | return 1; /* success */ |
214 | return 1; /* success */ |
| 228 | |
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| 229 | } |
215 | } |
| 230 | |
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| 231 | |
216 | |
| 232 | /* write all the rooms into the maze */ |
217 | /* write all the rooms into the maze */ |
| 233 | static void |
218 | static void |
| 234 | roguelike_make_rooms (Room * Rooms, char **maze, int options) |
219 | roguelike_make_rooms (Room *rooms, char **maze, int options) |
| 235 | { |
220 | { |
| 236 | int making_circle = 0; |
221 | int making_circle = 0; |
| 237 | int i, j; |
222 | int i, j; |
| 238 | int R; |
223 | int R; |
| 239 | Room *walk; |
224 | Room *walk; |
| 240 | |
225 | |
| 241 | for (walk = Rooms; walk->x != 0; walk++) |
226 | for (walk = rooms; walk->x != 0; walk++) |
| 242 | { |
227 | { |
| 243 | /* first decide what shape to make */ |
228 | /* first decide what shape to make */ |
| 244 | switch (options) |
229 | switch (options) |
| 245 | { |
230 | { |
| 246 | case 1: |
231 | case 1: |
| … | |
… | |
| 248 | break; |
233 | break; |
| 249 | case 2: |
234 | case 2: |
| 250 | making_circle = 1; |
235 | making_circle = 1; |
| 251 | break; |
236 | break; |
| 252 | default: |
237 | default: |
| 253 | making_circle = ((rndm (3) == 0) ? 1 : 0); |
238 | making_circle = ((rmg_rndm (3) == 0) ? 1 : 0); |
| 254 | break; |
239 | break; |
| 255 | } |
240 | } |
| 256 | |
241 | |
| 257 | if (walk->sx < walk->sy) |
242 | if (walk->sx < walk->sy) |
| 258 | R = walk->sx / 2; |
243 | R = walk->sx / 2; |
| … | |
… | |
| 260 | R = walk->sy / 2; |
245 | R = walk->sy / 2; |
| 261 | |
246 | |
| 262 | /* enscribe a rectangle */ |
247 | /* enscribe a rectangle */ |
| 263 | for (i = walk->ax; i < walk->zx; i++) |
248 | for (i = walk->ax; i < walk->zx; i++) |
| 264 | for (j = walk->ay; j < walk->zy; j++) |
249 | for (j = walk->ay; j < walk->zy; j++) |
| 265 | { |
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| 266 | if (!making_circle || ((int) (0.5 + hypot (walk->x - i, walk->y - j))) <= R) |
250 | if (!making_circle || ((int) (0.5 + hypot (walk->x - i, walk->y - j))) <= R) |
| 267 | maze[i][j] = '.'; |
251 | maze[i][j] = '.'; |
| 268 | } |
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| 269 | } |
252 | } |
| 270 | } |
253 | } |
| 271 | |
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| 272 | |
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| 273 | |
254 | |
| 274 | static void |
255 | static void |
| 275 | roguelike_link_rooms (Room * Rooms, char **maze, int xsize, int ysize) |
256 | roguelike_link_rooms (Room *rooms, char **maze, int xsize, int ysize) |
| 276 | { |
257 | { |
| 277 | Room *walk; |
258 | Room *walk; |
| 278 | int i, j; |
259 | int i, j; |
| 279 | |
260 | |
| 280 | /* link each room to the previous room */ |
261 | /* link each room to the previous room */ |
| 281 | if (Rooms[1].x == 0) |
262 | if (rooms[1].x == 0) |
| 282 | return; /* only 1 room */ |
263 | return; /* only 1 room */ |
| 283 | |
264 | |
| 284 | for (walk = Rooms + 1; walk->x != 0; walk++) |
265 | for (walk = rooms + 1; walk->x != 0; walk++) |
| 285 | { |
266 | { |
| 286 | int x1 = walk->x; |
267 | int x1 = walk->x; |
| 287 | int y1 = walk->y; |
268 | int y1 = walk->y; |
| 288 | int x2 = (walk - 1)->x; |
269 | int x2 = (walk - 1)->x; |
| 289 | int y2 = (walk - 1)->y; |
270 | int y2 = (walk - 1)->y; |
| 290 | int in_wall = 0; |
271 | int in_wall = 0; |
| 291 | |
272 | |
| 292 | if (rndm (2)) |
273 | if (rmg_rndm (2)) |
| 293 | { /* connect in x direction first */ |
274 | { /* connect in x direction first */ |
| 294 | /* horizontal connect */ |
275 | /* horizontal connect */ |
| 295 | /* swap (x1,y1) (x2,y2) if necessary */ |
276 | /* swap (x1,y1) (x2,y2) if necessary */ |
| 296 | |
277 | |
| 297 | if (x2 < x1) |
278 | if (x2 < x1) |
| … | |
… | |
| 319 | maze[i - 1][j] = 'D'; |
300 | maze[i - 1][j] = 'D'; |
| 320 | } |
301 | } |
| 321 | else if (maze[i][j] != 'D' && maze[i][j] != '.') |
302 | else if (maze[i][j] != 'D' && maze[i][j] != '.') |
| 322 | maze[i][j] = 0; |
303 | maze[i][j] = 0; |
| 323 | } |
304 | } |
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305 | |
| 324 | j = MIN (y1, y2); |
306 | j = min (y1, y2); |
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307 | |
| 325 | if (maze[i][j] == '.') |
308 | if (maze[i][j] == '.') |
| 326 | in_wall = 0; |
309 | in_wall = 0; |
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310 | |
| 327 | if (maze[i][j] == 0 || maze[i][j] == '#') |
311 | if (maze[i][j] == 0 || maze[i][j] == '#') |
| 328 | in_wall = 1; |
312 | in_wall = 1; |
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313 | |
| 329 | for ( /* j set already */ ; j < MAX (y1, y2); j++) |
314 | for ( /* j set already */ ; j < max (y1, y2); j++) |
| 330 | { |
315 | { |
| 331 | if (in_wall == 0 && maze[i][j] == '#') |
316 | if (in_wall == 0 && maze[i][j] == '#') |
| 332 | { |
317 | { |
| 333 | in_wall = 1; |
318 | in_wall = 1; |
| 334 | maze[i][j] = 'D'; |
319 | maze[i][j] = 'D'; |
| … | |
… | |
| 372 | } |
357 | } |
| 373 | else if (maze[i][j] != 'D' && maze[i][j] != '.') |
358 | else if (maze[i][j] != 'D' && maze[i][j] != '.') |
| 374 | maze[i][j] = 0; |
359 | maze[i][j] = 0; |
| 375 | } |
360 | } |
| 376 | |
361 | |
| 377 | i = MIN (x1, x2); |
362 | i = min (x1, x2); |
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363 | |
| 378 | if (maze[i][j] == '.') |
364 | if (maze[i][j] == '.') |
| 379 | in_wall = 0; |
365 | in_wall = 0; |
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|
366 | |
| 380 | if (maze[i][j] == 0 || maze[i][j] == '#') |
367 | if (maze[i][j] == 0 || maze[i][j] == '#') |
| 381 | in_wall = 1; |
368 | in_wall = 1; |
|
|
369 | |
| 382 | for ( /* i set already */ ; i < MAX (x1, x2); i++) |
370 | for ( /* i set already */ ; i < max (x1, x2); i++) |
| 383 | { |
371 | { |
| 384 | if (in_wall == 0 && maze[i][j] == '#') |
372 | if (in_wall == 0 && maze[i][j] == '#') |
| 385 | { |
373 | { |
| 386 | in_wall = 1; |
374 | in_wall = 1; |
| 387 | maze[i][j] = 'D'; |
375 | maze[i][j] = 'D'; |
| … | |
… | |
| 398 | |
386 | |
| 399 | } |
387 | } |
| 400 | |
388 | |
| 401 | } |
389 | } |
| 402 | } |
390 | } |
|
|
391 | |
