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1 | /* |
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2 | * This file is part of Deliantra, the Roguelike Realtime MMORPG. |
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3 | * |
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4 | * Copyright (©) 2005,2006,2007,2008,2009 Marc Alexander Lehmann / Robin Redeker / the Deliantra team |
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5 | * Copyright (©) Crossfire Development Team (restored, original file without copyright notice) |
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6 | * |
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7 | * Deliantra is free software: you can redistribute it and/or modify it under |
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8 | * the terms of the Affero GNU General Public License as published by the |
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9 | * Free Software Foundation, either version 3 of the License, or (at your |
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10 | * option) any later version. |
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11 | * |
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12 | * This program is distributed in the hope that it will be useful, |
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13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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15 | * GNU General Public License for more details. |
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16 | * |
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17 | * You should have received a copy of the Affero GNU General Public License |
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18 | * and the GNU General Public License along with this program. If not, see |
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19 | * <http://www.gnu.org/licenses/>. |
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20 | * |
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21 | * The authors can be reached via e-mail to <support@deliantra.net> |
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22 | */ |
| 1 | |
23 | |
| 2 | /* generate a rogue/nethack-like layout */ |
24 | /* generate a rogue/nethack-like maze */ |
| 3 | #include <global.h> |
25 | #include <global.h> |
| 4 | #include <random_map.h> |
26 | #include <random_map.h> |
| 5 | #include <math.h> |
27 | #include <rproto.h> |
| 6 | |
28 | |
| 7 | typedef struct |
29 | typedef struct |
| 8 | { |
30 | { |
| 9 | int x; |
31 | int x; |
| 10 | int y; /* coordinates of room centers */ |
32 | int y; /* coordinates of room centers */ |
| … | |
… | |
| 16 | int rtype; /* circle or rectangular */ |
38 | int rtype; /* circle or rectangular */ |
| 17 | } Room; |
39 | } Room; |
| 18 | |
40 | |
| 19 | static int roguelike_place_room (Room *rooms, int xsize, int ysize, int nrooms); |
41 | 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); |
42 | 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); |
43 | static void roguelike_link_rooms (Room *rooms, layout &maze); |
| 22 | |
44 | |
| 23 | int |
45 | int |
| 24 | surround_check (char **layout, int i, int j, int Xsize, int Ysize) |
46 | surround_check (layout &maze, int i, int j) |
| 25 | { |
47 | { |
| 26 | /* 1 = wall to left, |
48 | /* 1 = wall to left, |
| 27 | 2 = wall to right, |
49 | 2 = wall to right, |
| 28 | 4 = wall above |
50 | 4 = wall above |
| 29 | 8 = wall below */ |
51 | 8 = wall below */ |
| 30 | int surround_index = 0; |
52 | int surround_index = 0; |
| 31 | |
53 | |
| 32 | if ((i > 0) && (layout[i - 1][j] != 0 && layout[i - 1][j] != '.')) |
54 | if ((i > 0) && (maze[i - 1][j] != 0 && maze[i - 1][j] != '.')) surround_index |= 1; |
| 33 | surround_index += 1; |
55 | if ((i < maze.w - 1) && (maze[i + 1][j] != 0 && maze[i + 1][j] != '.')) surround_index |= 2; |
| 34 | if ((i < Xsize - 1) && (layout[i + 1][j] != 0 && layout[i + 1][j] != '.')) |
56 | if ((j > 0) && (maze[i][j - 1] != 0 && maze[i][j - 1] != '.')) surround_index |= 4; |
| 35 | surround_index += 2; |
57 | if ((j < maze.h - 1) && (maze[i][j + 1] != 0 && maze[i][j + 1] != '.')) surround_index |= 8; |
| 36 | if ((j > 0) && (layout[i][j - 1] != 0 && layout[i][j - 1] != '.')) |
58 | |
| 37 | surround_index += 4; |
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| 38 | if ((j < Ysize - 1) && (layout[i][j + 1] != 0 && layout[i][j + 1] != '.')) |
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| 39 | surround_index += 8; |
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| 40 | return surround_index; |
59 | return surround_index; |
| 41 | } |
60 | } |
| 42 | |
61 | |
| 43 | /* actually make the layout: we work by a reduction process: |
62 | /* actually make the maze: we work by a reduction process: |
| 44 | * first we make everything a wall, then we remove areas to make rooms |
63 | * first we make everything a wall, then we remove areas to make rooms |
| 45 | */ |
64 | */ |
| 46 | void |
65 | void |
| 47 | roguelike_layout_gen (Maze maze, int options) |
66 | roguelike_layout_gen (layout &maze, int options) |
| 48 | { |
67 | { |
| 49 | int i, j; |
68 | int i, j; |
| 50 | Room *walk; |
69 | Room *walk; |
| 51 | int nrooms = 0; |
70 | int nrooms = 0; |
| 52 | int tries = 0; |
71 | int tries = 0; |
| 53 | |
72 | |
| 54 | int xsize = maze->w; |
73 | int xsize = maze.w; |
| 55 | int ysize = maze->h; |
74 | int ysize = maze.h; |
| 56 | |
75 | |
| 57 | /* minimum room size is basically 5x5: if xsize/ysize is |
76 | /* minimum room size is basically 5x5: if xsize/ysize is |
| 58 | less than 3x that then hollow things out, stick in |
77 | less than 3x that then hollow things out, stick in |
| 59 | a stairsup and stairs down, and exit */ |
78 | a stairsup and stairs down, and exit */ |
| 60 | if (xsize < 11 || ysize < 11) |
79 | if (xsize < 11 || ysize < 11) |
| 61 | { |
80 | { |
| 62 | maze->clear (); |
81 | maze.clear (); |
| 63 | maze->border (); |
82 | maze.border (); |
| 64 | |
83 | |
| 65 | maze[(xsize - 1) / 2][(ysize - 1) / 2 ] = '>'; |
84 | maze[(xsize - 1) / 2][(ysize - 1) / 2 ] = '>'; |
| 66 | maze[(xsize - 1) / 2][(ysize - 1) / 2 + 1] = '<'; |
85 | maze[(xsize - 1) / 2][(ysize - 1) / 2 + 1] = '<'; |
| 67 | |
86 | |
| 68 | return; |
87 | return; |
| 69 | } |
88 | } |
| 70 | |
89 | |
| 71 | maze->clear ('#'); |
90 | maze.fill ('#'); |
| 72 | |
91 | |
| 73 | /* decide on the number of rooms */ |
92 | /* decide on the number of rooms */ |
| 74 | nrooms = rndm (10) + 6; |
93 | nrooms = rmg_rndm (10) + 6; |
| 75 | Room *rooms = salloc0<Room> (nrooms + 1); |
94 | Room *rooms = salloc0<Room> (nrooms + 1); |
| 76 | |
95 | |
| 77 | /* actually place the rooms */ |
96 | /* actually place the rooms */ |
| 78 | i = 0; |
97 | i = 0; |
| 79 | while (tries < 450 && i < nrooms) |
98 | while (tries < 450 && i < nrooms) |
| … | |
… | |
| 83 | tries++; |
102 | tries++; |
| 84 | else |
103 | else |
| 85 | i++; |
104 | i++; |
| 86 | } |
105 | } |
| 87 | |
106 | |
| 88 | if (i == 0) |
107 | if (i == 0) /* no can do! */ |
| 89 | { /* no can do! */ |
108 | { |
| 90 | maze->clear (); |
109 | maze.clear (); |
| 91 | maze->border (); |
110 | maze.border (); |
| 92 | |
111 | |
| 93 | maze [(xsize - 1) / 2][(ysize - 1) / 2 ] = '>'; |
112 | maze [(xsize - 1) / 2][(ysize - 1) / 2 ] = '>'; |
| 94 | maze [(xsize - 1) / 2][(ysize - 1) / 2 + 1] = '<'; |
113 | maze [(xsize - 1) / 2][(ysize - 1) / 2 + 1] = '<'; |
| 95 | |
114 | |
| 96 | sfree (rooms, nrooms + 1); |
115 | sfree (rooms, nrooms + 1); |
| 97 | return; |
116 | return; |
| 98 | } |
117 | } |
| 99 | |
118 | |
| 100 | |
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| 101 | /* erase the areas occupied by the rooms */ |
119 | /* erase the areas occupied by the rooms */ |
| 102 | roguelike_make_rooms (rooms, maze, options); |
120 | roguelike_make_rooms (rooms, maze, options); |
| 103 | |
121 | |
| 104 | roguelike_link_rooms (rooms, maze, xsize, ysize); |
122 | roguelike_link_rooms (rooms, maze); |
| 105 | |
123 | |
| 106 | /* put in the stairs */ |
124 | /* put in the stairs */ |
| 107 | |
125 | |
| 108 | maze[rooms->x][rooms->y] = '<'; |
126 | maze[rooms->x][rooms->y] = '<'; |
| 109 | |
127 | |
| … | |
… | |
| 136 | if (maze[i][j] == '.') |
154 | if (maze[i][j] == '.') |
| 137 | maze[i][j] = 0; |
155 | maze[i][j] = 0; |
| 138 | |
156 | |
| 139 | if (maze[i][j] == 'D') |
157 | if (maze[i][j] == 'D') |
| 140 | { /* remove bad door. */ |
158 | { /* remove bad door. */ |
| 141 | int si = surround_check (maze, i, j, xsize, ysize); |
159 | int si = surround_check (maze, i, j); |
| 142 | |
160 | |
| 143 | if (si != 3 && si != 12) |
161 | if (si != 3 && si != 12) |
| 144 | { |
162 | { |
| 145 | maze[i][j] = 0; |
163 | maze[i][j] = 0; |
| 146 | /* back up and recheck any nearby doors */ |
164 | /* back up and recheck any nearby doors */ |
| … | |
… | |
| 166 | |
184 | |
| 167 | /* decide on the base x and y sizes */ |
185 | /* decide on the base x and y sizes */ |
| 168 | x_basesize = xsize / isqrt (nrooms); |
186 | x_basesize = xsize / isqrt (nrooms); |
| 169 | y_basesize = ysize / isqrt (nrooms); |
187 | y_basesize = ysize / isqrt (nrooms); |
| 170 | |
188 | |
| 171 | tx = rndm (xsize); |
189 | tx = rmg_rndm (xsize); |
| 172 | ty = rndm (ysize); |
190 | ty = rmg_rndm (ysize); |
| 173 | |
191 | |
| 174 | /* generate a distribution of sizes centered about basesize */ |
192 | /* generate a distribution of sizes centered about basesize */ |
| 175 | sx = rndm (x_basesize) + rndm (x_basesize) + rndm (x_basesize); |
193 | sx = rmg_rndm (x_basesize) + rmg_rndm (x_basesize) + rmg_rndm (x_basesize); |
| 176 | sy = rndm (y_basesize) + rndm (y_basesize) + rndm (y_basesize); |
194 | sy = rmg_rndm (y_basesize) + rmg_rndm (y_basesize) + rmg_rndm (y_basesize); |
| 177 | sy = (int) (sy * .5); /* renormalize */ |
195 | sy >>= 1; /* renormalize */ |
| 178 | |
196 | |
| 179 | /* find the corners */ |
197 | /* find the corners */ |
| 180 | ax = tx - sx / 2; |
198 | ax = tx - sx / 2; |
| 181 | zx = tx + sx / 2 + sx % 2; |
199 | zx = tx + sx / 2 + sx % 2; |
| 182 | |
200 | |
| … | |
… | |
| 202 | } |
220 | } |
| 203 | |
221 | |
| 204 | /* if we've got here, presumably the room is OK. */ |
222 | /* if we've got here, presumably the room is OK. */ |
| 205 | |
223 | |
| 206 | /* get a pointer to the first free room */ |
224 | /* get a pointer to the first free room */ |
| 207 | for (walk = rooms; walk->x != 0; walk++) |
225 | for (walk = rooms; walk->x; walk++) |
| 208 | ; |
226 | ; |
| 209 | |
227 | |
| 210 | walk->x = tx; |
228 | walk->x = tx; |
| 211 | walk->y = ty; |
229 | walk->y = ty; |
| 212 | walk->sx = sx; |
230 | walk->sx = sx; |
| 213 | walk->sy = sy; |
231 | walk->sy = sy; |
| 214 | walk->ax = ax; |
232 | walk->ax = ax; |
| 215 | walk->ay = ay; |
233 | walk->ay = ay; |
| 216 | walk->zx = zx; |
234 | walk->zx = zx; |
| … | |
… | |
| 222 | /* write all the rooms into the maze */ |
240 | /* write all the rooms into the maze */ |
| 223 | static void |
241 | static void |
| 224 | roguelike_make_rooms (Room *rooms, char **maze, int options) |
242 | roguelike_make_rooms (Room *rooms, char **maze, int options) |
| 225 | { |
243 | { |
| 226 | int making_circle = 0; |
244 | int making_circle = 0; |
| 227 | int i, j; |
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| 228 | int R; |
245 | int R; |
| 229 | Room *walk; |
246 | Room *walk; |
| 230 | |
247 | |
| 231 | for (walk = rooms; walk->x != 0; walk++) |
248 | for (walk = rooms; walk->x; walk++) |
| 232 | { |
249 | { |
| 233 | /* first decide what shape to make */ |
250 | /* first decide what shape to make */ |
| 234 | switch (options) |
251 | switch (options) |
| 235 | { |
252 | { |
| 236 | case 1: |
253 | case 1: |
| … | |
… | |
| 238 | break; |
255 | break; |
| 239 | case 2: |
256 | case 2: |
| 240 | making_circle = 1; |
257 | making_circle = 1; |
| 241 | break; |
258 | break; |
| 242 | default: |
259 | default: |
| 243 | making_circle = ((rndm (3) == 0) ? 1 : 0); |
260 | making_circle = ((rmg_rndm (3) == 0) ? 1 : 0); |
| 244 | break; |
261 | break; |
| 245 | } |
262 | } |
| 246 | |
263 | |
| 247 | if (walk->sx < walk->sy) |
264 | if (walk->sx < walk->sy) |
| 248 | R = walk->sx / 2; |
265 | R = walk->sx / 2; |
| 249 | else |
266 | else |
| 250 | R = walk->sy / 2; |
267 | R = walk->sy / 2; |
| 251 | |
268 | |
| 252 | /* enscribe a rectangle */ |
269 | /* enscribe a rectangle */ |
| 253 | for (i = walk->ax; i < walk->zx; i++) |
270 | for (int i = walk->ax; i < walk->zx; i++) |
| 254 | for (j = walk->ay; j < walk->zy; j++) |
271 | for (int j = walk->ay; j < walk->zy; j++) |
| 255 | if (!making_circle || ((int) (0.5 + hypot (walk->x - i, walk->y - j))) <= R) |
272 | if (!making_circle || ((int) (0.5 + hypot (walk->x - i, walk->y - j))) <= R) |
| 256 | maze[i][j] = '.'; |
273 | maze[i][j] = '.'; |
| 257 | } |
274 | } |
| 258 | } |
275 | } |
| 259 | |
276 | |
| 260 | static void |
277 | static void |
| 261 | roguelike_link_rooms (Room *rooms, char **maze, int xsize, int ysize) |
278 | roguelike_link_rooms (Room *rooms, layout &maze) |
| 262 | { |
279 | { |
| 263 | Room *walk; |
280 | Room *walk; |
| 264 | int i, j; |
281 | int i, j; |
| 265 | |
282 | |
| 266 | /* link each room to the previous room */ |
283 | /* link each room to the previous room */ |
| … | |
… | |
| 273 | int y1 = walk->y; |
290 | int y1 = walk->y; |
| 274 | int x2 = (walk - 1)->x; |
291 | int x2 = (walk - 1)->x; |
| 275 | int y2 = (walk - 1)->y; |
292 | int y2 = (walk - 1)->y; |
| 276 | int in_wall = 0; |
293 | int in_wall = 0; |
| 277 | |
294 | |
| 278 | if (rndm (2)) |
295 | if (rmg_rndm (2)) |
| 279 | { /* connect in x direction first */ |
296 | { /* connect in x direction first */ |
| 280 | /* horizontal connect */ |
297 | /* horizontal connect */ |
| 281 | /* swap (x1,y1) (x2,y2) if necessary */ |
298 | /* swap (x1,y1) (x2,y2) if necessary */ |
| 282 | |
299 | |
| 283 | if (x2 < x1) |
300 | if (x2 < x1) |
| … | |
… | |
| 305 | maze[i - 1][j] = 'D'; |
322 | maze[i - 1][j] = 'D'; |
| 306 | } |
323 | } |
| 307 | else if (maze[i][j] != 'D' && maze[i][j] != '.') |
324 | else if (maze[i][j] != 'D' && maze[i][j] != '.') |
| 308 | maze[i][j] = 0; |
325 | maze[i][j] = 0; |
| 309 | } |
326 | } |
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327 | |
| 310 | j = MIN (y1, y2); |
328 | j = min (y1, y2); |
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329 | |
| 311 | if (maze[i][j] == '.') |
330 | if (maze[i][j] == '.') |
| 312 | in_wall = 0; |
331 | in_wall = 0; |
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332 | |
| 313 | if (maze[i][j] == 0 || maze[i][j] == '#') |
333 | if (maze[i][j] == 0 || maze[i][j] == '#') |
| 314 | in_wall = 1; |
334 | in_wall = 1; |
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335 | |
| 315 | for ( /* j set already */ ; j < MAX (y1, y2); j++) |
336 | for ( /* j set already */ ; j < max (y1, y2); j++) |
| 316 | { |
337 | { |
| 317 | if (in_wall == 0 && maze[i][j] == '#') |
338 | if (in_wall == 0 && maze[i][j] == '#') |
| 318 | { |
339 | { |
| 319 | in_wall = 1; |
340 | in_wall = 1; |
| 320 | maze[i][j] = 'D'; |
341 | maze[i][j] = 'D'; |
| … | |
… | |
| 358 | } |
379 | } |
| 359 | else if (maze[i][j] != 'D' && maze[i][j] != '.') |
380 | else if (maze[i][j] != 'D' && maze[i][j] != '.') |
| 360 | maze[i][j] = 0; |
381 | maze[i][j] = 0; |
| 361 | } |
382 | } |
| 362 | |
383 | |
| 363 | i = MIN (x1, x2); |
384 | i = min (x1, x2); |
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385 | |
| 364 | if (maze[i][j] == '.') |
386 | if (maze[i][j] == '.') |
| 365 | in_wall = 0; |
387 | in_wall = 0; |
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388 | |
| 366 | if (maze[i][j] == 0 || maze[i][j] == '#') |
389 | if (maze[i][j] == 0 || maze[i][j] == '#') |
| 367 | in_wall = 1; |
390 | in_wall = 1; |
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391 | |
| 368 | for ( /* i set already */ ; i < MAX (x1, x2); i++) |
392 | for ( /* i set already */ ; i < max (x1, x2); i++) |
| 369 | { |
393 | { |
| 370 | if (in_wall == 0 && maze[i][j] == '#') |
394 | if (in_wall == 0 && maze[i][j] == '#') |
| 371 | { |
395 | { |
| 372 | in_wall = 1; |
396 | in_wall = 1; |
| 373 | maze[i][j] = 'D'; |
397 | maze[i][j] = 'D'; |
