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| 3 | /* peterm@langmuir.eecs.berkeley.edu: this function generates a random |
2 | /* peterm@langmuir.eecs.berkeley.edu: this function generates a random |
| 4 | snake-type layout. |
3 | snake-type layout. |
| 5 | |
4 | |
| 6 | input: xsize, ysize; |
5 | input: xsize, ysize; |
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| 17 | #include <time.h> |
16 | #include <time.h> |
| 18 | |
17 | |
| 19 | |
18 | |
| 20 | |
19 | |
| 21 | |
20 | |
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21 | char ** |
| 22 | char **make_snake_layout(int xsize, int ysize,int options) { |
22 | make_snake_layout (int xsize, int ysize, int options) |
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23 | { |
| 23 | int i,j; |
24 | int i, j; |
| 24 | |
25 | |
| 25 | /* allocate that array, set it up */ |
26 | /* allocate that array, set it up */ |
| 26 | char **maze = (char **)calloc(sizeof(char*),xsize); |
27 | char **maze = (char **) calloc (sizeof (char *), xsize); |
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28 | |
| 27 | for(i=0;i<xsize;i++) { |
29 | for (i = 0; i < xsize; i++) |
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30 | { |
| 28 | maze[i] = (char *) calloc(sizeof(char),ysize); |
31 | maze[i] = (char *) calloc (sizeof (char), ysize); |
| 29 | } |
32 | } |
| 30 | |
33 | |
| 31 | /* write the outer walls */ |
34 | /* write the outer walls */ |
| 32 | for(i=0;i<xsize;i++) |
35 | for (i = 0; i < xsize; i++) |
| 33 | maze[i][0] = maze[i][ysize-1] = '#'; |
36 | maze[i][0] = maze[i][ysize - 1] = '#'; |
| 34 | for(j=0;j<ysize;j++) |
37 | for (j = 0; j < ysize; j++) |
| 35 | maze[0][j] = maze[xsize-1][j] = '#'; |
38 | maze[0][j] = maze[xsize - 1][j] = '#'; |
| 36 | |
39 | |
| 37 | /* Bail out if the size is too small to make a snake. */ |
40 | /* Bail out if the size is too small to make a snake. */ |
| 38 | if(xsize < 8 || ysize < 8) return maze; |
41 | if (xsize < 8 || ysize < 8) |
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42 | return maze; |
| 39 | |
43 | |
| 40 | /* decide snake orientation--vertical or horizontal , and |
44 | /* decide snake orientation--vertical or horizontal , and |
| 41 | make the walls and place the doors. */ |
45 | make the walls and place the doors. */ |
| 42 | |
46 | |
| 43 | if(RANDOM()%2) { /* vertical orientation */ |
47 | if (RANDOM () % 2) |
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48 | { /* vertical orientation */ |
| 44 | int n_walls = RANDOM() % ((xsize - 5)/3) +1; |
49 | int n_walls = RANDOM () % ((xsize - 5) / 3) + 1; |
| 45 | int spacing = xsize / (n_walls+1); |
50 | int spacing = xsize / (n_walls + 1); |
| 46 | int orientation=1; |
51 | int orientation = 1; |
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52 | |
| 47 | for(i=spacing;i<xsize-3;i+=spacing) { |
53 | for (i = spacing; i < xsize - 3; i += spacing) |
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54 | { |
| 48 | if(orientation) { |
55 | if (orientation) |
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56 | { |
| 49 | for(j=1;j<ysize-2;j++) { |
57 | for (j = 1; j < ysize - 2; j++) |
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58 | { |
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59 | maze[i][j] = '#'; |
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60 | } |
| 50 | maze[i][j] = '#'; |
61 | maze[i][j] = 'D'; |
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62 | } |
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63 | else |
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64 | { |
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65 | for (j = 2; j < ysize; j++) |
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66 | { |
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67 | maze[i][j] = '#'; |
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68 | } |
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69 | maze[i][1] = 'D'; |
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70 | } |
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71 | orientation ^= 1; /* toggle the value of orientation */ |
| 51 | } |
72 | } |
| 52 | maze[i][j] = 'D'; |
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| 53 | } |
73 | } |
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74 | else |
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75 | { /* horizontal orientation */ |
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76 | int n_walls = RANDOM () % ((ysize - 5) / 3) + 1; |
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77 | int spacing = ysize / (n_walls + 1); |
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78 | int orientation = 1; |
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79 | |
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80 | for (i = spacing; i < ysize - 3; i += spacing) |
| 54 | else { |
81 | { |
| 55 | for(j=2;j<ysize;j++) { |
82 | if (orientation) |
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83 | { |
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84 | for (j = 1; j < xsize - 2; j++) |
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85 | { |
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86 | maze[j][i] = '#'; |
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87 | } |
| 56 | maze[i][j] = '#'; |
88 | maze[j][i] = 'D'; |
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89 | } |
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90 | else |
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91 | { |
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92 | for (j = 2; j < xsize; j++) |
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93 | { |
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94 | maze[j][i] = '#'; |
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95 | } |
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96 | maze[1][i] = 'D'; |
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97 | } |
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98 | orientation ^= 1; /* toggle the value of orientation */ |
| 57 | } |
99 | } |
| 58 | maze[i][1] = 'D'; |
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| 59 | } |
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| 60 | orientation ^= 1; /* toggle the value of orientation */ |
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| 61 | } |
100 | } |
| 62 | } |
101 | |
| 63 | else { /* horizontal orientation */ |
102 | /* place the exit up/down */ |
| 64 | int n_walls = RANDOM() % ((ysize - 5)/3) +1; |
103 | if (RANDOM () % 2) |
| 65 | int spacing = ysize / (n_walls+1); |
104 | { |
| 66 | int orientation=1; |
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| 67 | for(i=spacing;i<ysize-3;i+=spacing) { |
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| 68 | if(orientation) { |
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| 69 | for(j=1;j<xsize-2;j++) { |
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| 70 | maze[j][i] = '#'; |
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| 71 | } |
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| 72 | maze[j][i] = 'D'; |
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| 73 | } |
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| 74 | else { |
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| 75 | for(j=2;j<xsize;j++) { |
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| 76 | maze[j][i] = '#'; |
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| 77 | } |
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| 78 | maze[1][i] = 'D'; |
105 | maze[1][1] = '<'; |
| 79 | } |
106 | maze[xsize - 2][ysize - 2] = '>'; |
| 80 | orientation ^= 1; /* toggle the value of orientation */ |
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| 81 | } |
107 | } |
| 82 | } |
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| 83 | |
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| 84 | /* place the exit up/down */ |
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| 85 | if(RANDOM() %2) |
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| 86 | { maze[1][1] = '<'; maze[xsize-2][ysize-2]='>'; } |
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| 87 | else |
108 | else |
| 88 | { maze[1][1] = '>'; maze[xsize-2][ysize-2]='<'; } |
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| 89 | |
109 | { |
| 90 | |
110 | maze[1][1] = '>'; |
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111 | maze[xsize - 2][ysize - 2] = '<'; |
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112 | } |
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113 | |
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114 | |
| 91 | return maze; |
115 | return maze; |
| 92 | } |
116 | } |
| 93 | |
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| 95 | |
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