| 1 | /* |
1 | /* |
| 2 | * This file is part of Deliantra, the Roguelike Realtime MMORPG. |
2 | * This file is part of Deliantra, the Roguelike Realtime MMORPG. |
| 3 | * |
3 | * |
| 4 | * Copyright (©) 2005,2006,2007,2008,2009 Marc Alexander Lehmann / Robin Redeker / the Deliantra team |
4 | * Copyright (©) 2005,2006,2007,2008,2009,2010,2011 Marc Alexander Lehmann / Robin Redeker / the Deliantra team |
| 5 | * Copyright (©) Crossfire Development Team (restored, original file without copyright notice) |
5 | * Copyright (©) 1994-2004 Crossfire Development Team (restored, original file without copyright notice) |
| 6 | * |
6 | * |
| 7 | * Deliantra is free software: you can redistribute it and/or modify it under |
7 | * Deliantra is free software: you can redistribute it and/or modify it under |
| 8 | * the terms of the Affero GNU General Public License as published by the |
8 | * the terms of the Affero GNU General Public License as published by the |
| 9 | * Free Software Foundation, either version 3 of the License, or (at your |
9 | * Free Software Foundation, either version 3 of the License, or (at your |
| 10 | * option) any later version. |
10 | * option) any later version. |
| … | |
… | |
| 35 | |
35 | |
| 36 | /* we need to maintain a list of wall points to generate |
36 | /* we need to maintain a list of wall points to generate |
| 37 | reasonable mazes: a straightforward recursive random walk maze |
37 | reasonable mazes: a straightforward recursive random walk maze |
| 38 | generator would generate a map with a trivial circle-the-outer-wall solution */ |
38 | generator would generate a map with a trivial circle-the-outer-wall solution */ |
| 39 | |
39 | |
|
|
40 | #include <vector> |
|
|
41 | |
| 40 | #include <global.h> |
42 | #include <global.h> |
| 41 | |
43 | |
| 42 | #include "random_map.h" |
44 | #include <rmg.h> |
| 43 | #include "rproto.h" |
45 | #include "rproto.h" |
| 44 | |
46 | |
| 45 | /* global variables that everyone needs: don't want to pass them in |
47 | /* global variables that everyone needs: don't want to pass them in |
| 46 | as parameters every time. */ |
48 | as parameters every time. */ |
| 47 | static int *wall_x_list = 0; |
49 | static fixed_stack<point> seeds; |
| 48 | static int *wall_y_list = 0; |
|
|
| 49 | static int wall_free_size = 0; |
|
|
| 50 | static int xsize, ysize; |
50 | static int xsize, ysize; |
|
|
51 | static char **maze; |
|
|
52 | |
|
|
53 | static void |
|
|
54 | push (point p) |
|
|
55 | { |
|
|
56 | seeds.push (p); |
|
|
57 | maze [p.x][p.y] = '#'; |
|
|
58 | } |
|
|
59 | |
|
|
60 | /* randomly returns one of the elements from the wall point list */ |
|
|
61 | static point |
|
|
62 | pop_rand () |
|
|
63 | { |
|
|
64 | return seeds.remove (rmg_rndm (seeds.size)); |
|
|
65 | } |
| 51 | |
66 | |
| 52 | /* the free wall points are those outer points which aren't corners or |
67 | /* the free wall points are those outer points which aren't corners or |
| 53 | near corners, and don't have a maze wall growing out of them already. */ |
68 | near corners, and don't have a maze wall growing out of them already. */ |
| 54 | static void |
69 | static void |
| 55 | make_wall_free_list (int xsize, int ysize) |
70 | push_walls () |
| 56 | { |
71 | { |
| 57 | int i, j, count; |
|
|
| 58 | |
|
|
| 59 | count = 0; /* entries already placed in the free list */ |
|
|
| 60 | /*allocate it */ |
|
|
| 61 | if (wall_free_size < 0) |
|
|
| 62 | return; |
|
|
| 63 | |
|
|
| 64 | wall_x_list = (int *)calloc (sizeof (int), wall_free_size); |
|
|
| 65 | wall_y_list = (int *)calloc (sizeof (int), wall_free_size); |
|
|
| 66 | |
|
|
| 67 | /* top and bottom wall */ |
72 | /* top and bottom wall */ |
| 68 | for (i = 2; i < xsize - 2; i++) |
73 | for (int x = 2; x < xsize - 2; x++) |
| 69 | { |
74 | { |
| 70 | wall_x_list[count] = i; |
75 | push (point (x, 0)); |
| 71 | wall_y_list[count] = 0; |
76 | push (point (x, ysize - 1)); |
| 72 | count++; |
|
|
| 73 | wall_x_list[count] = i; |
|
|
| 74 | wall_y_list[count] = ysize - 1; |
|
|
| 75 | count++; |
|
|
| 76 | } |
77 | } |
| 77 | |
78 | |
| 78 | /* left and right wall */ |
79 | /* left and right wall */ |
| 79 | for (j = 2; j < ysize - 2; j++) |
80 | for (int y = 2; y < ysize - 2; y++) |
| 80 | { |
|
|
| 81 | wall_x_list[count] = 0; |
|
|
| 82 | wall_y_list[count] = j; |
|
|
| 83 | count++; |
|
|
| 84 | wall_x_list[count] = xsize - 1; |
|
|
| 85 | wall_y_list[count] = j; |
|
|
| 86 | count++; |
|
|
| 87 | } |
81 | { |
| 88 | } |
82 | push (point ( 0, y)); |
| 89 | |
83 | push (point (xsize - 1, y)); |
| 90 | /* randomly returns one of the elements from the wall point list */ |
84 | } |
| 91 | static void |
|
|
| 92 | pop_wall_point (int *x, int *y) |
|
|
| 93 | { |
|
|
| 94 | int index = rmg_rndm (wall_free_size); |
|
|
| 95 | |
|
|
| 96 | *x = wall_x_list[index]; |
|
|
| 97 | *y = wall_y_list[index]; |
|
|
| 98 | |
|
|
| 99 | /* write the last array point here */ |
|
|
| 100 | wall_x_list[index] = wall_x_list[wall_free_size - 1]; |
|
|
| 101 | wall_y_list[index] = wall_y_list[wall_free_size - 1]; |
|
|
| 102 | wall_free_size--; |
|
|
| 103 | } |
85 | } |
| 104 | |
86 | |
| 105 | /* find free point: randomly look for a square adjacent to this one where |
87 | /* find free point: randomly look for a square adjacent to this one where |
| 106 | we can place a new block without closing a path. We may only look |
88 | we can place a new block without closing a path. We may only look |
| 107 | up, down, right, or left. */ |
89 | up, down, right, or left. */ |
| 108 | static int |
90 | static int |
| 109 | find_free_point (char **maze, int *x, int *y, int xc, int yc) |
91 | find_free_point (point &p, point pc) |
| 110 | { |
92 | { |
| 111 | /* we will randomly pick from this list, 1=up,2=down,3=right,4=left */ |
93 | /* we will randomly pick from this list, 1=up,2=down,3=right,4=left */ |
| 112 | int dirlist[4]; |
94 | int dirlist[4]; |
| 113 | int count = 0; /* # elements in dirlist */ |
95 | int count = 0; /* # elements in dirlist */ |
| 114 | |
96 | |
|
|
97 | int xc = pc.x; |
|
|
98 | int yc = pc.y; |
|
|
99 | |
| 115 | /* look up */ |
100 | /* look up */ |
| 116 | if (yc < ysize - 2 && xc > 2 && xc < xsize - 2) /* it is valid to look up */ |
101 | if (yc < ysize - 2 && xc > 2 && xc < xsize - 2) /* it is valid to look up */ |
| 117 | { |
102 | { |
| 118 | int cleartest = maze[xc][yc + 1] + maze[xc - 1][yc + 1] + maze[xc + 1][yc + 1] |
103 | int cleartest = maze[xc][yc + 1] + maze[xc - 1][yc + 1] + maze[xc + 1][yc + 1] |
| 119 | + maze[xc][yc + 2] + maze[xc - 1][yc + 2] + maze[xc + 1][yc + 2]; |
104 | + maze[xc][yc + 2] + maze[xc - 1][yc + 2] + maze[xc + 1][yc + 2]; |
| … | |
… | |
| 157 | |
142 | |
| 158 | /* choose a random direction */ |
143 | /* choose a random direction */ |
| 159 | switch (dirlist [rmg_rndm (count)]) |
144 | switch (dirlist [rmg_rndm (count)]) |
| 160 | { |
145 | { |
| 161 | case 1: /* up */ |
146 | case 1: /* up */ |
|
|
147 | p.x = xc; |
| 162 | *y = yc + 1; |
148 | p.y = yc + 1; |
| 163 | *x = xc; |
|
|
| 164 | break; |
149 | break; |
| 165 | |
150 | |
| 166 | case 2: /* down */ |
151 | case 2: /* down */ |
|
|
152 | p.x = xc; |
| 167 | *y = yc - 1; |
153 | p.y = yc - 1; |
| 168 | *x = xc; |
|
|
| 169 | break; |
154 | break; |
| 170 | |
155 | |
| 171 | case 3: /* right */ |
156 | case 3: /* right */ |
| 172 | *y = yc; |
|
|
| 173 | *x = xc + 1; |
157 | p.x = xc + 1; |
|
|
158 | p.y = yc; |
| 174 | break; |
159 | break; |
| 175 | |
160 | |
| 176 | case 4: /* left */ |
161 | case 4: /* left */ |
| 177 | *x = xc - 1; |
162 | p.x = xc - 1; |
| 178 | *y = yc; |
163 | p.y = yc; |
| 179 | break; |
164 | break; |
| 180 | } |
165 | } |
| 181 | |
166 | |
| 182 | return 1; |
167 | return 1; |
| 183 | } |
|
|
| 184 | |
|
|
| 185 | /* recursive routine which will fill every available space in the maze |
|
|
| 186 | with walls*/ |
|
|
| 187 | static void |
|
|
| 188 | fill_maze_full (char **maze, int x, int y) |
|
|
| 189 | { |
|
|
| 190 | int xc, yc; |
|
|
| 191 | |
|
|
| 192 | /* write a wall here */ |
|
|
| 193 | maze[x][y] = '#'; |
|
|
| 194 | |
|
|
| 195 | /* decide if we're going to pick from the wall_free_list */ |
|
|
| 196 | if (rmg_rndm (2) && wall_free_size > 0) |
|
|
| 197 | { |
|
|
| 198 | pop_wall_point (&xc, &yc); |
|
|
| 199 | fill_maze_full (maze, xc, yc); |
|
|
| 200 | } |
|
|
| 201 | |
|
|
| 202 | /* change the while to an if for a sparse maze. */ |
|
|
| 203 | while (find_free_point (maze, &xc, &yc, x, y) != -1) |
|
|
| 204 | fill_maze_full (maze, xc, yc); |
|
|
| 205 | } |
|
|
| 206 | |
|
|
| 207 | /* recursive routine which will fill much of the maze, but will leave |
|
|
| 208 | some free spots (possibly large) toward the center.*/ |
|
|
| 209 | static void |
|
|
| 210 | fill_maze_sparse (char **maze, int x, int y) |
|
|
| 211 | { |
|
|
| 212 | int xc, yc; |
|
|
| 213 | |
|
|
| 214 | /* write a wall here */ |
|
|
| 215 | maze[x][y] = '#'; |
|
|
| 216 | |
|
|
| 217 | /* decide if we're going to pick from the wall_free_list */ |
|
|
| 218 | if (rmg_rndm (2) && wall_free_size > 0) |
|
|
| 219 | { |
|
|
| 220 | pop_wall_point (&xc, &yc); |
|
|
| 221 | fill_maze_sparse (maze, xc, yc); |
|
|
| 222 | } |
|
|
| 223 | |
|
|
| 224 | /* change the if to a while for a complete maze. */ |
|
|
| 225 | if (find_free_point (maze, &xc, &yc, x, y) != -1) |
|
|
| 226 | fill_maze_sparse (maze, xc, yc); |
|
|
| 227 | } |
168 | } |
| 228 | |
169 | |
| 229 | /* the outsize interface routine: accepts sizes, returns a char |
170 | /* the outsize interface routine: accepts sizes, returns a char |
| 230 | ** maze. option is a flag for either a sparse or a full maze. Sparse |
171 | ** maze. option is a flag for either a sparse or a full maze. Sparse |
| 231 | mazes have sizable rooms. option = 1, full, 0, sparse.*/ |
172 | mazes have sizable rooms. option = 3=full, 2=braided, 1=sparse, 0=rooms.*/ |
| 232 | void |
173 | void |
| 233 | maze_gen (Layout maze, int full) |
174 | maze_gen (layout &maze, int subtype) |
| 234 | { |
175 | { |
| 235 | maze->clear (); |
|
|
| 236 | maze->border (); |
|
|
| 237 | |
|
|
| 238 | xsize = maze->w; |
176 | xsize = maze.w; |
| 239 | ysize = maze->h; |
177 | ysize = maze.h; |
|
|
178 | ::maze = maze; |
| 240 | |
179 | |
| 241 | /* find how many free wall spots there are */ |
180 | maze.clear (); |
| 242 | wall_free_size = 2 * (maze->w - 4) + 2 * (maze->h - 4); |
181 | maze.border (); |
| 243 | |
182 | |
| 244 | make_wall_free_list (maze->w, maze->h); |
183 | if (xsize < 4 || ysize < 4) |
| 245 | |
|
|
| 246 | /* return the empty maze */ |
|
|
| 247 | if (wall_free_size <= 0) |
|
|
| 248 | return; |
184 | return; |
|
|
185 | |
|
|
186 | seeds.reset (xsize * ysize); |
|
|
187 | |
|
|
188 | if (subtype > 0) |
|
|
189 | push_walls (); |
|
|
190 | |
|
|
191 | if (subtype == 0 || subtype == 2) |
|
|
192 | for (int i = (xsize + ysize) / 2; i; --i) |
|
|
193 | push (point (rmg_rndm (1, xsize - 2), rmg_rndm (1, ysize - 2))); |
|
|
194 | |
|
|
195 | bool full = subtype == 3; |
| 249 | |
196 | |
| 250 | /* recursively generate the walls of the maze */ |
197 | /* recursively generate the walls of the maze */ |
| 251 | /* first pop a random starting point */ |
198 | /* first pop a random starting point */ |
| 252 | while (wall_free_size > 0) |
199 | while (seeds.size) |
| 253 | { |
200 | { |
| 254 | int i, j; |
201 | point p = pop_rand (); |
| 255 | |
202 | |
| 256 | pop_wall_point (&i, &j); |
203 | for (;;) |
|
|
204 | { |
|
|
205 | point pc; |
| 257 | |
206 | |
|
|
207 | maze [p.x][p.y] = '#'; |
|
|
208 | |
|
|
209 | if (find_free_point (pc, p) < 0) |
|
|
210 | break; |
|
|
211 | |
| 258 | if (full) |
212 | if (full) |
| 259 | fill_maze_full (maze, i, j); |
213 | push (p); |
| 260 | else |
|
|
| 261 | fill_maze_sparse (maze, i, j); |
|
|
| 262 | } |
|
|
| 263 | |
214 | |
| 264 | /* clean up our intermediate data structures. */ |
215 | if (!rmg_rndm (8)) |
|
|
216 | { |
|
|
217 | if (!full) |
|
|
218 | push (pc); |
| 265 | |
219 | |
| 266 | free (wall_x_list); |
220 | break; |
| 267 | free (wall_y_list); |
221 | } |
| 268 | } |
|
|
| 269 | |
222 | |
| 270 | #if 1 |
223 | p = pc; |
| 271 | static struct demo |
|
|
| 272 | { |
|
|
| 273 | demo () |
|
|
| 274 | { |
|
|
| 275 | Layout layout (30, 30); |
|
|
| 276 | rmg_rndm.seed (time (0)); |
|
|
| 277 | |
|
|
| 278 | for(int i=1;i<10;++i) |
|
|
| 279 | { |
|
|
| 280 | maze_gen (layout, 1); |
|
|
| 281 | layout.print (); |
|
|
| 282 | } |
224 | } |
| 283 | exit (1); |
|
|
| 284 | } |
225 | } |
| 285 | } demo; |
226 | |
| 286 | #endif |
227 | seeds.free (); |
|
|
228 | } |
|
|
229 | |
