| 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 | |
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40 | #include <vector> |
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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; |
50 | static int xsize, ysize; |
| 49 | static int wall_free_size = 0; |
51 | static char **maze; |
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52 | |
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53 | static void |
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54 | push (point p) |
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55 | { |
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56 | seeds.push (p); |
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57 | maze [p.x][p.y] = '#'; |
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58 | } |
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59 | |
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60 | /* randomly returns one of the elements from the wall point list */ |
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61 | static point |
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62 | pop_rand () |
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63 | { |
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64 | return seeds.remove (rmg_rndm (seeds.size)); |
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65 | } |
| 50 | |
66 | |
| 51 | /* 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 |
| 52 | 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. */ |
| 53 | static void |
69 | static void |
| 54 | make_wall_free_list (int xsize, int ysize) |
70 | push_walls () |
| 55 | { |
71 | { |
| 56 | int i, j, count; |
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| 57 | |
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| 58 | count = 0; /* entries already placed in the free list */ |
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| 59 | /*allocate it */ |
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| 60 | if (wall_free_size < 0) |
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| 61 | return; |
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| 62 | |
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| 63 | wall_x_list = (int *)calloc (sizeof (int), wall_free_size); |
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| 64 | wall_y_list = (int *)calloc (sizeof (int), wall_free_size); |
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| 65 | |
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| 66 | /* top and bottom wall */ |
72 | /* top and bottom wall */ |
| 67 | for (i = 2; i < xsize - 2; i++) |
73 | for (int x = 2; x < xsize - 2; x++) |
| 68 | { |
74 | { |
| 69 | wall_x_list[count] = i; |
75 | push (point (x, 0)); |
| 70 | wall_y_list[count] = 0; |
76 | push (point (x, ysize - 1)); |
| 71 | count++; |
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| 72 | wall_x_list[count] = i; |
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| 73 | wall_y_list[count] = ysize - 1; |
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| 74 | count++; |
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| 75 | } |
77 | } |
| 76 | |
78 | |
| 77 | /* left and right wall */ |
79 | /* left and right wall */ |
| 78 | for (j = 2; j < ysize - 2; j++) |
80 | for (int y = 2; y < ysize - 2; y++) |
| 79 | { |
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| 80 | wall_x_list[count] = 0; |
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| 81 | wall_y_list[count] = j; |
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| 82 | count++; |
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| 83 | wall_x_list[count] = xsize - 1; |
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| 84 | wall_y_list[count] = j; |
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| 85 | count++; |
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| 86 | } |
81 | { |
| 87 | } |
82 | push (point ( 0, y)); |
| 88 | |
83 | push (point (xsize - 1, y)); |
| 89 | /* randomly returns one of the elements from the wall point list */ |
84 | } |
| 90 | static void |
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| 91 | pop_wall_point (int *x, int *y) |
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| 92 | { |
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| 93 | int index = rmg_rndm (wall_free_size); |
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| 94 | |
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| 95 | *x = wall_x_list[index]; |
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| 96 | *y = wall_y_list[index]; |
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| 97 | |
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| 98 | /* write the last array point here */ |
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| 99 | wall_x_list[index] = wall_x_list[wall_free_size - 1]; |
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| 100 | wall_y_list[index] = wall_y_list[wall_free_size - 1]; |
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| 101 | wall_free_size--; |
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| 102 | } |
85 | } |
| 103 | |
86 | |
| 104 | /* 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 |
| 105 | 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 |
| 106 | up, down, right, or left. */ |
89 | up, down, right, or left. */ |
| 107 | static int |
90 | static int |
| 108 | find_free_point (char **maze, int *x, int *y, int xc, int yc, int xsize, int ysize) |
91 | find_free_point (point &p, point pc) |
| 109 | { |
92 | { |
| 110 | /* 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 */ |
| 111 | int dirlist[4]; |
94 | int dirlist[4]; |
| 112 | int count = 0; /* # elements in dirlist */ |
95 | int count = 0; /* # elements in dirlist */ |
| 113 | |
96 | |
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97 | int xc = pc.x; |
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98 | int yc = pc.y; |
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99 | |
| 114 | /* look up */ |
100 | /* look up */ |
| 115 | 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 */ |
| 116 | { |
102 | { |
| 117 | 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] |
| 118 | + 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]; |
| … | |
… | |
| 156 | |
142 | |
| 157 | /* choose a random direction */ |
143 | /* choose a random direction */ |
| 158 | switch (dirlist [rmg_rndm (count)]) |
144 | switch (dirlist [rmg_rndm (count)]) |
| 159 | { |
145 | { |
| 160 | case 1: /* up */ |
146 | case 1: /* up */ |
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147 | p.x = xc; |
| 161 | *y = yc + 1; |
148 | p.y = yc + 1; |
| 162 | *x = xc; |
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| 163 | break; |
149 | break; |
| 164 | |
150 | |
| 165 | case 2: /* down */ |
151 | case 2: /* down */ |
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152 | p.x = xc; |
| 166 | *y = yc - 1; |
153 | p.y = yc - 1; |
| 167 | *x = xc; |
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| 168 | break; |
154 | break; |
| 169 | |
155 | |
| 170 | case 3: /* right */ |
156 | case 3: /* right */ |
| 171 | *y = yc; |
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| 172 | *x = xc + 1; |
157 | p.x = xc + 1; |
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158 | p.y = yc; |
| 173 | break; |
159 | break; |
| 174 | |
160 | |
| 175 | case 4: /* left */ |
161 | case 4: /* left */ |
| 176 | *x = xc - 1; |
162 | p.x = xc - 1; |
| 177 | *y = yc; |
163 | p.y = yc; |
| 178 | break; |
164 | break; |
| 179 | } |
165 | } |
| 180 | |
166 | |
| 181 | return 1; |
167 | return 1; |
| 182 | } |
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| 183 | |
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| 184 | /* recursive routine which will fill every available space in the maze |
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| 185 | with walls*/ |
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| 186 | static void |
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| 187 | fill_maze_full (char **maze, int x, int y, int xsize, int ysize) |
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| 188 | { |
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| 189 | int xc, yc; |
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| 190 | |
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| 191 | /* write a wall here */ |
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| 192 | maze[x][y] = '#'; |
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| 193 | |
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| 194 | /* decide if we're going to pick from the wall_free_list */ |
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| 195 | if (rmg_rndm (4) && wall_free_size > 0) |
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| 196 | { |
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| 197 | pop_wall_point (&xc, &yc); |
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| 198 | fill_maze_full (maze, xc, yc, xsize, ysize); |
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| 199 | } |
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| 200 | |
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| 201 | /* change the while to an if for a sparse maze. */ |
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| 202 | while (find_free_point (maze, &xc, &yc, x, y, xsize, ysize) != -1) |
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| 203 | fill_maze_full (maze, xc, yc, xsize, ysize); |
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| 204 | } |
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| 205 | |
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| 206 | /* recursive routine which will fill much of the maze, but will leave |
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| 207 | some free spots (possibly large) toward the center.*/ |
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| 208 | static void |
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| 209 | fill_maze_sparse (char **maze, int x, int y, int xsize, int ysize) |
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| 210 | { |
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| 211 | int xc, yc; |
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| 212 | |
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| 213 | /* write a wall here */ |
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| 214 | maze[x][y] = '#'; |
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| 215 | |
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| 216 | /* decide if we're going to pick from the wall_free_list */ |
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| 217 | if (rmg_rndm (4) && wall_free_size > 0) |
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| 218 | { |
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| 219 | pop_wall_point (&xc, &yc); |
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| 220 | fill_maze_sparse (maze, xc, yc, xsize, ysize); |
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| 221 | } |
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| 222 | |
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| 223 | /* change the if to a while for a complete maze. */ |
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| 224 | if (find_free_point (maze, &xc, &yc, x, y, xsize, ysize) != -1) |
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| 225 | fill_maze_sparse (maze, xc, yc, xsize, ysize); |
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| 226 | } |
168 | } |
| 227 | |
169 | |
| 228 | /* the outsize interface routine: accepts sizes, returns a char |
170 | /* the outsize interface routine: accepts sizes, returns a char |
| 229 | ** 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 |
| 230 | mazes have sizable rooms. option = 1, full, 0, sparse.*/ |
172 | mazes have sizable rooms. option = 3=full, 2=braided, 1=sparse, 0=rooms.*/ |
| 231 | void |
173 | void |
| 232 | maze_gen (Layout maze, int full) |
174 | maze_gen (layout &maze, int subtype) |
| 233 | { |
175 | { |
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176 | xsize = maze.w; |
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177 | ysize = maze.h; |
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178 | ::maze = maze; |
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179 | |
| 234 | maze->clear (); |
180 | maze.clear (); |
| 235 | maze->border (); |
181 | maze.border (); |
| 236 | |
182 | |
| 237 | /* find how many free wall spots there are */ |
183 | if (xsize < 4 || ysize < 4) |
| 238 | wall_free_size = 2 * (maze->w - 4) + 2 * (maze->h - 4); |
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| 239 | |
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| 240 | make_wall_free_list (maze->w, maze->h); |
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| 241 | |
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| 242 | /* return the empty maze */ |
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| 243 | if (wall_free_size <= 0) |
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| 244 | return; |
184 | return; |
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185 | |
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186 | seeds.reset (xsize * ysize); |
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187 | |
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188 | if (subtype > 0) |
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189 | push_walls (); |
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190 | |
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191 | if (subtype == 0 || subtype == 2) |
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192 | for (int i = (xsize + ysize) / 2; i; --i) |
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193 | push (point (rmg_rndm (1, xsize - 2), rmg_rndm (1, ysize - 2))); |
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194 | |
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195 | bool full = subtype == 3; |
| 245 | |
196 | |
| 246 | /* recursively generate the walls of the maze */ |
197 | /* recursively generate the walls of the maze */ |
| 247 | /* first pop a random starting point */ |
198 | /* first pop a random starting point */ |
| 248 | while (wall_free_size > 0) |
199 | while (seeds.size) |
| 249 | { |
200 | { |
| 250 | int i, j; |
201 | point p = pop_rand (); |
| 251 | |
202 | |
| 252 | pop_wall_point (&i, &j); |
203 | for (;;) |
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204 | { |
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205 | point pc; |
| 253 | |
206 | |
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207 | maze [p.x][p.y] = '#'; |
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208 | |
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209 | if (find_free_point (pc, p) < 0) |
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210 | break; |
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211 | |
| 254 | if (full) |
212 | if (full) |
| 255 | fill_maze_full (maze, i, j, maze->w, maze->h); |
213 | push (p); |
| 256 | else |
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| 257 | fill_maze_sparse (maze, i, j, maze->w, maze->h); |
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| 258 | } |
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| 259 | |
214 | |
| 260 | /* clean up our intermediate data structures. */ |
215 | if (!rmg_rndm (8)) |
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216 | { |
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217 | if (!full) |
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218 | push (pc); |
| 261 | |
219 | |
| 262 | free (wall_x_list); |
220 | break; |
| 263 | free (wall_y_list); |
221 | } |
| 264 | } |
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| 265 | |
222 | |
| 266 | #if 0 |
223 | p = pc; |
| 267 | static struct demo |
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| 268 | { |
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| 269 | demo () |
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| 270 | { |
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| 271 | Layout layout (30, 30); |
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| 272 | rmg_rndm.seed (time (0)); |
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| 273 | |
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| 274 | for(int i=1;i<10;++i) |
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| 275 | { |
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| 276 | maze_gen (layout, 1); |
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| 277 | layout.print (); |
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| 278 | } |
224 | } |
| 279 | exit (1); |
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| 280 | } |
225 | } |
| 281 | } demo; |
226 | |
| 282 | #endif |
227 | seeds.free (); |
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228 | } |
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229 | |
