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| 1 | /* peterm@langmuir.eecs.berkeley.edu: this function generates a random |
2 | /* peterm@langmuir.eecs.berkeley.edu: this function generates a random |
| 2 | snake-type layout. |
3 | snake-type layout. |
| 3 | |
4 | |
| 4 | input: xsize, ysize; |
5 | input: xsize, ysize; |
| 5 | output: a char** array with # and . for closed and open respectively. |
6 | output: a char** array with # and . for closed and open respectively. |
| … | |
… | |
| 7 | a char value of 0 represents a blank space: a '#' is |
8 | a char value of 0 represents a blank space: a '#' is |
| 8 | a wall. |
9 | a wall. |
| 9 | |
10 | |
| 10 | */ |
11 | */ |
| 11 | |
12 | |
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13 | #include <global.h> |
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14 | #include "random_map.h" |
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15 | #include "rproto.h" |
| 12 | |
16 | |
| 13 | #include <stdio.h> |
17 | void |
| 14 | #include <global.h> |
18 | make_snake_layout (Maze maze, int options) |
| 15 | #include <time.h> |
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| 16 | |
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| 17 | |
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| 18 | |
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| 19 | |
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| 20 | char ** |
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| 21 | make_snake_layout (int xsize, int ysize, int options) |
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| 22 | { |
19 | { |
| 23 | int i, j; |
20 | int i, j; |
| 24 | |
21 | |
| 25 | /* allocate that array, set it up */ |
22 | maze->clear (); |
| 26 | char **maze = (char **) calloc (sizeof (char *), xsize); |
23 | maze->border (); |
| 27 | |
24 | |
| 28 | for (i = 0; i < xsize; i++) |
25 | int xsize = maze->w; |
| 29 | { |
26 | int ysize = maze->h; |
| 30 | maze[i] = (char *) calloc (sizeof (char), ysize); |
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| 31 | } |
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| 32 | |
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| 33 | /* write the outer walls */ |
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| 34 | for (i = 0; i < xsize; i++) |
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| 35 | maze[i][0] = maze[i][ysize - 1] = '#'; |
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| 36 | for (j = 0; j < ysize; j++) |
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| 37 | maze[0][j] = maze[xsize - 1][j] = '#'; |
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| 38 | |
27 | |
| 39 | /* Bail out if the size is too small to make a snake. */ |
28 | /* Bail out if the size is too small to make a snake. */ |
| 40 | if (xsize < 8 || ysize < 8) |
29 | if (xsize < 8 || ysize < 8) |
| 41 | return maze; |
30 | return; |
| 42 | |
31 | |
| 43 | /* decide snake orientation--vertical or horizontal , and |
32 | /* decide snake orientation--vertical or horizontal , and |
| 44 | make the walls and place the doors. */ |
33 | make the walls and place the doors. */ |
| 45 | |
34 | |
| 46 | if (RANDOM () % 2) |
35 | if (rndm (2)) |
| 47 | { /* vertical orientation */ |
36 | { /* vertical orientation */ |
| 48 | int n_walls = RANDOM () % ((xsize - 5) / 3) + 1; |
37 | int n_walls = rndm (xsize - 5) / 3 + 1; |
| 49 | int spacing = xsize / (n_walls + 1); |
38 | int spacing = xsize / (n_walls + 1); |
| 50 | int orientation = 1; |
39 | int orientation = 1; |
| 51 | |
40 | |
| 52 | for (i = spacing; i < xsize - 3; i += spacing) |
41 | for (i = spacing; i < xsize - 3; i += spacing) |
| 53 | { |
42 | { |
| 54 | if (orientation) |
43 | if (orientation) |
| 55 | { |
44 | { |
| 56 | for (j = 1; j < ysize - 2; j++) |
45 | for (j = 1; j < ysize - 2; j++) |
| 57 | { |
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| 58 | maze[i][j] = '#'; |
46 | maze[i][j] = '#'; |
| 59 | } |
47 | |
| 60 | maze[i][j] = 'D'; |
48 | maze[i][j] = 'D'; |
| 61 | } |
49 | } |
| 62 | else |
50 | else |
| 63 | { |
51 | { |
| 64 | for (j = 2; j < ysize; j++) |
52 | for (j = 2; j < ysize; j++) |
| 65 | { |
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| 66 | maze[i][j] = '#'; |
53 | maze[i][j] = '#'; |
| 67 | } |
54 | |
| 68 | maze[i][1] = 'D'; |
55 | maze[i][1] = 'D'; |
| 69 | } |
56 | } |
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57 | |
| 70 | orientation ^= 1; /* toggle the value of orientation */ |
58 | orientation ^= 1; /* toggle the value of orientation */ |
| 71 | } |
59 | } |
| 72 | } |
60 | } |
| 73 | else |
61 | else |
| 74 | { /* horizontal orientation */ |
62 | { /* horizontal orientation */ |
| 75 | int n_walls = RANDOM () % ((ysize - 5) / 3) + 1; |
63 | int n_walls = rndm (ysize - 5) / 3 + 1; |
| 76 | int spacing = ysize / (n_walls + 1); |
64 | int spacing = ysize / (n_walls + 1); |
| 77 | int orientation = 1; |
65 | int orientation = 1; |
| 78 | |
66 | |
| 79 | for (i = spacing; i < ysize - 3; i += spacing) |
67 | for (i = spacing; i < ysize - 3; i += spacing) |
| 80 | { |
68 | { |
| 81 | if (orientation) |
69 | if (orientation) |
| 82 | { |
70 | { |
| 83 | for (j = 1; j < xsize - 2; j++) |
71 | for (j = 1; j < xsize - 2; j++) |
| 84 | { |
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| 85 | maze[j][i] = '#'; |
72 | maze[j][i] = '#'; |
| 86 | } |
73 | |
| 87 | maze[j][i] = 'D'; |
74 | maze[j][i] = 'D'; |
| 88 | } |
75 | } |
| 89 | else |
76 | else |
| 90 | { |
77 | { |
| 91 | for (j = 2; j < xsize; j++) |
78 | for (j = 2; j < xsize; j++) |
| 92 | { |
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| 93 | maze[j][i] = '#'; |
79 | maze[j][i] = '#'; |
| 94 | } |
80 | |
| 95 | maze[1][i] = 'D'; |
81 | maze[1][i] = 'D'; |
| 96 | } |
82 | } |
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83 | |
| 97 | orientation ^= 1; /* toggle the value of orientation */ |
84 | orientation ^= 1; /* toggle the value of orientation */ |
| 98 | } |
85 | } |
| 99 | } |
86 | } |
| 100 | |
87 | |
| 101 | /* place the exit up/down */ |
88 | /* place the exit up/down */ |
| 102 | if (RANDOM () % 2) |
89 | if (rndm (2)) |
| 103 | { |
90 | { |
| 104 | maze[1][1] = '<'; |
91 | maze[1][1] = '<'; |
| 105 | maze[xsize - 2][ysize - 2] = '>'; |
92 | maze[xsize - 2][ysize - 2] = '>'; |
| 106 | } |
93 | } |
| 107 | else |
94 | else |
| 108 | { |
95 | { |
| 109 | maze[1][1] = '>'; |
96 | maze[1][1] = '>'; |
| 110 | maze[xsize - 2][ysize - 2] = '<'; |
97 | maze[xsize - 2][ysize - 2] = '<'; |
| 111 | } |
98 | } |
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99 | } |
| 112 | |
100 | |
| 113 | |
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| 114 | return maze; |
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| 115 | } |
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