| 1 |
/* generate a rogue/nethack-like layout */ |
| 2 |
#include <global.h> |
| 3 |
#include <random_map.h> |
| 4 |
#include <rproto.h> |
| 5 |
|
| 6 |
typedef struct |
| 7 |
{ |
| 8 |
int x; |
| 9 |
int y; /* coordinates of room centers */ |
| 10 |
|
| 11 |
int sx; |
| 12 |
int sy; /* sizes */ |
| 13 |
int ax, ay, zx, zy; /* coordinates of extrema of the rectangle */ |
| 14 |
|
| 15 |
int rtype; /* circle or rectangular */ |
| 16 |
} Room; |
| 17 |
|
| 18 |
static int roguelike_place_room (Room *rooms, int xsize, int ysize, int nrooms); |
| 19 |
static void roguelike_make_rooms (Room *rooms, char **maze, int options); |
| 20 |
static void roguelike_link_rooms (Room *rooms, char **maze, int xsize, int ysize); |
| 21 |
|
| 22 |
int |
| 23 |
surround_check (char **layout, int i, int j, int Xsize, int Ysize) |
| 24 |
{ |
| 25 |
/* 1 = wall to left, |
| 26 |
2 = wall to right, |
| 27 |
4 = wall above |
| 28 |
8 = wall below */ |
| 29 |
int surround_index = 0; |
| 30 |
|
| 31 |
if ((i > 0) && (layout[i - 1][j] != 0 && layout[i - 1][j] != '.')) surround_index |= 1; |
| 32 |
if ((i < Xsize - 1) && (layout[i + 1][j] != 0 && layout[i + 1][j] != '.')) surround_index |= 2; |
| 33 |
if ((j > 0) && (layout[i][j - 1] != 0 && layout[i][j - 1] != '.')) surround_index |= 4; |
| 34 |
if ((j < Ysize - 1) && (layout[i][j + 1] != 0 && layout[i][j + 1] != '.')) surround_index |= 8; |
| 35 |
|
| 36 |
return surround_index; |
| 37 |
} |
| 38 |
|
| 39 |
/* actually make the layout: we work by a reduction process: |
| 40 |
* first we make everything a wall, then we remove areas to make rooms |
| 41 |
*/ |
| 42 |
void |
| 43 |
roguelike_layout_gen (Layout maze, int options) |
| 44 |
{ |
| 45 |
int i, j; |
| 46 |
Room *walk; |
| 47 |
int nrooms = 0; |
| 48 |
int tries = 0; |
| 49 |
|
| 50 |
int xsize = maze->w; |
| 51 |
int ysize = maze->h; |
| 52 |
|
| 53 |
/* minimum room size is basically 5x5: if xsize/ysize is |
| 54 |
less than 3x that then hollow things out, stick in |
| 55 |
a stairsup and stairs down, and exit */ |
| 56 |
if (xsize < 11 || ysize < 11) |
| 57 |
{ |
| 58 |
maze->clear (); |
| 59 |
maze->border (); |
| 60 |
|
| 61 |
maze[(xsize - 1) / 2][(ysize - 1) / 2 ] = '>'; |
| 62 |
maze[(xsize - 1) / 2][(ysize - 1) / 2 + 1] = '<'; |
| 63 |
|
| 64 |
return; |
| 65 |
} |
| 66 |
|
| 67 |
maze->clear ('#'); |
| 68 |
|
| 69 |
/* decide on the number of rooms */ |
| 70 |
nrooms = rmg_rndm (10) + 6; |
| 71 |
Room *rooms = salloc0<Room> (nrooms + 1); |
| 72 |
|
| 73 |
/* actually place the rooms */ |
| 74 |
i = 0; |
| 75 |
while (tries < 450 && i < nrooms) |
| 76 |
{ |
| 77 |
/* try to place the room */ |
| 78 |
if (!roguelike_place_room (rooms, xsize, ysize, nrooms)) |
| 79 |
tries++; |
| 80 |
else |
| 81 |
i++; |
| 82 |
} |
| 83 |
|
| 84 |
if (i == 0) /* no can do! */ |
| 85 |
{ |
| 86 |
maze->clear (); |
| 87 |
maze->border (); |
| 88 |
|
| 89 |
maze [(xsize - 1) / 2][(ysize - 1) / 2 ] = '>'; |
| 90 |
maze [(xsize - 1) / 2][(ysize - 1) / 2 + 1] = '<'; |
| 91 |
|
| 92 |
sfree (rooms, nrooms + 1); |
| 93 |
return; |
| 94 |
} |
| 95 |
|
| 96 |
/* erase the areas occupied by the rooms */ |
| 97 |
roguelike_make_rooms (rooms, maze, options); |
| 98 |
|
| 99 |
roguelike_link_rooms (rooms, maze, xsize, ysize); |
| 100 |
|
| 101 |
/* put in the stairs */ |
| 102 |
|
| 103 |
maze[rooms->x][rooms->y] = '<'; |
| 104 |
|
| 105 |
/* get the last one */ |
| 106 |
for (walk = rooms; walk->x != 0; walk++) |
| 107 |
; |
| 108 |
|
| 109 |
/* back up one */ |
| 110 |
walk--; |
| 111 |
|
| 112 |
if (walk == rooms) |
| 113 |
{ |
| 114 |
/* In this case, there is only a single room. We don't want to |
| 115 |
* clobber are up exit (above) with a down exit, so put the |
| 116 |
* other exit one space up/down, depending which is a space |
| 117 |
* and not a wall. |
| 118 |
*/ |
| 119 |
if (maze[walk->x][walk->y + 1] == '.') |
| 120 |
maze[walk->x][walk->y + 1] = '>'; |
| 121 |
else |
| 122 |
maze[walk->x][walk->y - 1] = '>'; |
| 123 |
} |
| 124 |
else |
| 125 |
maze[walk->x][walk->y] = '>'; |
| 126 |
|
| 127 |
/* convert all the '.' to 0, we're through with the '.' */ |
| 128 |
for (i = 0; i < xsize; i++) |
| 129 |
for (j = 0; j < ysize; j++) |
| 130 |
{ |
| 131 |
if (maze[i][j] == '.') |
| 132 |
maze[i][j] = 0; |
| 133 |
|
| 134 |
if (maze[i][j] == 'D') |
| 135 |
{ /* remove bad door. */ |
| 136 |
int si = surround_check (maze, i, j, xsize, ysize); |
| 137 |
|
| 138 |
if (si != 3 && si != 12) |
| 139 |
{ |
| 140 |
maze[i][j] = 0; |
| 141 |
/* back up and recheck any nearby doors */ |
| 142 |
i = 0; |
| 143 |
j = 0; |
| 144 |
} |
| 145 |
} |
| 146 |
} |
| 147 |
|
| 148 |
sfree (rooms, nrooms + 1); |
| 149 |
} |
| 150 |
|
| 151 |
static int |
| 152 |
roguelike_place_room (Room *rooms, int xsize, int ysize, int nrooms) |
| 153 |
{ |
| 154 |
int tx, ty; /* trial center locations */ |
| 155 |
int sx, sy; /* trial sizes */ |
| 156 |
int ax, ay; /* min coords of rect */ |
| 157 |
int zx, zy; /* max coords of rect */ |
| 158 |
int x_basesize; |
| 159 |
int y_basesize; |
| 160 |
Room *walk; |
| 161 |
|
| 162 |
/* decide on the base x and y sizes */ |
| 163 |
x_basesize = xsize / isqrt (nrooms); |
| 164 |
y_basesize = ysize / isqrt (nrooms); |
| 165 |
|
| 166 |
tx = rmg_rndm (xsize); |
| 167 |
ty = rmg_rndm (ysize); |
| 168 |
|
| 169 |
/* generate a distribution of sizes centered about basesize */ |
| 170 |
sx = rmg_rndm (x_basesize) + rmg_rndm (x_basesize) + rmg_rndm (x_basesize); |
| 171 |
sy = rmg_rndm (y_basesize) + rmg_rndm (y_basesize) + rmg_rndm (y_basesize); |
| 172 |
sy = (int) (sy * .5); /* renormalize */ |
| 173 |
|
| 174 |
/* find the corners */ |
| 175 |
ax = tx - sx / 2; |
| 176 |
zx = tx + sx / 2 + sx % 2; |
| 177 |
|
| 178 |
ay = ty - sy / 2; |
| 179 |
zy = ty + sy / 2 + sy % 2; |
| 180 |
|
| 181 |
/* check to see if it's in the map */ |
| 182 |
if (zx > xsize - 1 || ax < 1) return 0; |
| 183 |
if (zy > ysize - 1 || ay < 1) return 0; |
| 184 |
|
| 185 |
/* no small fish */ |
| 186 |
if (sx < 3 || sy < 3) |
| 187 |
return 0; |
| 188 |
|
| 189 |
/* check overlap with existing rooms */ |
| 190 |
for (walk = rooms; walk->x != 0; walk++) |
| 191 |
{ |
| 192 |
int dx = abs (tx - walk->x); |
| 193 |
int dy = abs (ty - walk->y); |
| 194 |
|
| 195 |
if ((dx < (walk->sx + sx) / 2 + 2) && (dy < (walk->sy + sy) / 2 + 2)) |
| 196 |
return 0; |
| 197 |
} |
| 198 |
|
| 199 |
/* if we've got here, presumably the room is OK. */ |
| 200 |
|
| 201 |
/* get a pointer to the first free room */ |
| 202 |
for (walk = rooms; walk->x != 0; walk++) |
| 203 |
; |
| 204 |
|
| 205 |
walk->x = tx; |
| 206 |
walk->y = ty; |
| 207 |
walk->sx = sx; |
| 208 |
walk->sy = sy; |
| 209 |
walk->ax = ax; |
| 210 |
walk->ay = ay; |
| 211 |
walk->zx = zx; |
| 212 |
walk->zy = zy; |
| 213 |
|
| 214 |
return 1; /* success */ |
| 215 |
} |
| 216 |
|
| 217 |
/* write all the rooms into the maze */ |
| 218 |
static void |
| 219 |
roguelike_make_rooms (Room *rooms, char **maze, int options) |
| 220 |
{ |
| 221 |
int making_circle = 0; |
| 222 |
int i, j; |
| 223 |
int R; |
| 224 |
Room *walk; |
| 225 |
|
| 226 |
for (walk = rooms; walk->x != 0; walk++) |
| 227 |
{ |
| 228 |
/* first decide what shape to make */ |
| 229 |
switch (options) |
| 230 |
{ |
| 231 |
case 1: |
| 232 |
making_circle = 0; |
| 233 |
break; |
| 234 |
case 2: |
| 235 |
making_circle = 1; |
| 236 |
break; |
| 237 |
default: |
| 238 |
making_circle = ((rmg_rndm (3) == 0) ? 1 : 0); |
| 239 |
break; |
| 240 |
} |
| 241 |
|
| 242 |
if (walk->sx < walk->sy) |
| 243 |
R = walk->sx / 2; |
| 244 |
else |
| 245 |
R = walk->sy / 2; |
| 246 |
|
| 247 |
/* enscribe a rectangle */ |
| 248 |
for (i = walk->ax; i < walk->zx; i++) |
| 249 |
for (j = walk->ay; j < walk->zy; j++) |
| 250 |
if (!making_circle || ((int) (0.5 + hypot (walk->x - i, walk->y - j))) <= R) |
| 251 |
maze[i][j] = '.'; |
| 252 |
} |
| 253 |
} |
| 254 |
|
| 255 |
static void |
| 256 |
roguelike_link_rooms (Room *rooms, char **maze, int xsize, int ysize) |
| 257 |
{ |
| 258 |
Room *walk; |
| 259 |
int i, j; |
| 260 |
|
| 261 |
/* link each room to the previous room */ |
| 262 |
if (rooms[1].x == 0) |
| 263 |
return; /* only 1 room */ |
| 264 |
|
| 265 |
for (walk = rooms + 1; walk->x != 0; walk++) |
| 266 |
{ |
| 267 |
int x1 = walk->x; |
| 268 |
int y1 = walk->y; |
| 269 |
int x2 = (walk - 1)->x; |
| 270 |
int y2 = (walk - 1)->y; |
| 271 |
int in_wall = 0; |
| 272 |
|
| 273 |
if (rmg_rndm (2)) |
| 274 |
{ /* connect in x direction first */ |
| 275 |
/* horizontal connect */ |
| 276 |
/* swap (x1,y1) (x2,y2) if necessary */ |
| 277 |
|
| 278 |
if (x2 < x1) |
| 279 |
{ |
| 280 |
int tx = x2, ty = y2; |
| 281 |
|
| 282 |
x2 = x1; |
| 283 |
y2 = y1; |
| 284 |
x1 = tx; |
| 285 |
y1 = ty; |
| 286 |
} |
| 287 |
|
| 288 |
|
| 289 |
j = y1; |
| 290 |
for (i = x1; i < x2; i++) |
| 291 |
{ |
| 292 |
if (in_wall == 0 && maze[i][j] == '#') |
| 293 |
{ |
| 294 |
in_wall = 1; |
| 295 |
maze[i][j] = 'D'; |
| 296 |
} |
| 297 |
else if (in_wall && maze[i][j] == '.') |
| 298 |
{ |
| 299 |
in_wall = 0; |
| 300 |
maze[i - 1][j] = 'D'; |
| 301 |
} |
| 302 |
else if (maze[i][j] != 'D' && maze[i][j] != '.') |
| 303 |
maze[i][j] = 0; |
| 304 |
} |
| 305 |
|
| 306 |
j = min (y1, y2); |
| 307 |
|
| 308 |
if (maze[i][j] == '.') |
| 309 |
in_wall = 0; |
| 310 |
|
| 311 |
if (maze[i][j] == 0 || maze[i][j] == '#') |
| 312 |
in_wall = 1; |
| 313 |
|
| 314 |
for ( /* j set already */ ; j < max (y1, y2); j++) |
| 315 |
{ |
| 316 |
if (in_wall == 0 && maze[i][j] == '#') |
| 317 |
{ |
| 318 |
in_wall = 1; |
| 319 |
maze[i][j] = 'D'; |
| 320 |
} |
| 321 |
else if (in_wall && maze[i][j] == '.') |
| 322 |
{ |
| 323 |
in_wall = 0; |
| 324 |
maze[i][j - 1] = 'D'; |
| 325 |
} |
| 326 |
else if (maze[i][j] != 'D' && maze[i][j] != '.') |
| 327 |
maze[i][j] = 0; |
| 328 |
} |
| 329 |
|
| 330 |
} |
| 331 |
else |
| 332 |
{ /* connect in y direction first */ |
| 333 |
in_wall = 0; |
| 334 |
/* swap if necessary */ |
| 335 |
if (y2 < y1) |
| 336 |
{ |
| 337 |
int tx = x2, ty = y2; |
| 338 |
|
| 339 |
x2 = x1; |
| 340 |
y2 = y1; |
| 341 |
x1 = tx; |
| 342 |
y1 = ty; |
| 343 |
} |
| 344 |
i = x1; |
| 345 |
/* vertical connect */ |
| 346 |
for (j = y1; j < y2; j++) |
| 347 |
{ |
| 348 |
if (in_wall == 0 && maze[i][j] == '#') |
| 349 |
{ |
| 350 |
in_wall = 1; |
| 351 |
maze[i][j] = 'D'; |
| 352 |
} |
| 353 |
else if (in_wall && maze[i][j] == '.') |
| 354 |
{ |
| 355 |
in_wall = 0; |
| 356 |
maze[i][j - 1] = 'D'; |
| 357 |
} |
| 358 |
else if (maze[i][j] != 'D' && maze[i][j] != '.') |
| 359 |
maze[i][j] = 0; |
| 360 |
} |
| 361 |
|
| 362 |
i = min (x1, x2); |
| 363 |
|
| 364 |
if (maze[i][j] == '.') |
| 365 |
in_wall = 0; |
| 366 |
|
| 367 |
if (maze[i][j] == 0 || maze[i][j] == '#') |
| 368 |
in_wall = 1; |
| 369 |
|
| 370 |
for ( /* i set already */ ; i < max (x1, x2); i++) |
| 371 |
{ |
| 372 |
if (in_wall == 0 && maze[i][j] == '#') |
| 373 |
{ |
| 374 |
in_wall = 1; |
| 375 |
maze[i][j] = 'D'; |
| 376 |
} |
| 377 |
else if (in_wall && maze[i][j] == '.') |
| 378 |
{ |
| 379 |
in_wall = 0; |
| 380 |
maze[i - 1][j] = 'D'; |
| 381 |
} |
| 382 |
else if (maze[i][j] != 'D' && maze[i][j] != '.') |
| 383 |
maze[i][j] = 0; |
| 384 |
|
| 385 |
} |
| 386 |
|
| 387 |
} |
| 388 |
|
| 389 |
} |
| 390 |
} |
| 391 |
|
