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/* peterm@langmuir.eecs.berkeley.edu: this function generates a random |
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snake-type layout. |
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input: xsize, ysize; |
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output: a char** array with # and . for closed and open respectively. |
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a char value of 0 represents a blank space: a '#' is |
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a wall. |
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*/ |
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#include <stdio.h> |
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#include <global.h> |
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#include <time.h> |
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char **make_snake_layout(int xsize, int ysize,int options) { |
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int i,j; |
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/* allocate that array, set it up */ |
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char **maze = (char **)calloc(sizeof(char*),xsize); |
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for(i=0;i<xsize;i++) { |
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maze[i] = (char *) calloc(sizeof(char),ysize); |
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} |
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/* write the outer walls */ |
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for(i=0;i<xsize;i++) |
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maze[i][0] = maze[i][ysize-1] = '#'; |
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for(j=0;j<ysize;j++) |
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maze[0][j] = maze[xsize-1][j] = '#'; |
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/* Bail out if the size is too small to make a snake. */ |
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if(xsize < 8 || ysize < 8) return maze; |
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/* decide snake orientation--vertical or horizontal , and |
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make the walls and place the doors. */ |
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if(RANDOM()%2) { /* vertical orientation */ |
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int n_walls = RANDOM() % ((xsize - 5)/3) +1; |
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int spacing = xsize / (n_walls+1); |
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int orientation=1; |
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for(i=spacing;i<xsize-3;i+=spacing) { |
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if(orientation) { |
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for(j=1;j<ysize-2;j++) { |
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maze[i][j] = '#'; |
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} |
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maze[i][j] = 'D'; |
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} |
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else { |
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for(j=2;j<ysize;j++) { |
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maze[i][j] = '#'; |
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} |
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maze[i][1] = 'D'; |
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} |
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orientation ^= 1; /* toggle the value of orientation */ |
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} |
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} |
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else { /* horizontal orientation */ |
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int n_walls = RANDOM() % ((ysize - 5)/3) +1; |
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int spacing = ysize / (n_walls+1); |
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int orientation=1; |
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for(i=spacing;i<ysize-3;i+=spacing) { |
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if(orientation) { |
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for(j=1;j<xsize-2;j++) { |
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maze[j][i] = '#'; |
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} |
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maze[j][i] = 'D'; |
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} |
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else { |
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for(j=2;j<xsize;j++) { |
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maze[j][i] = '#'; |
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} |
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maze[1][i] = 'D'; |
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} |
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orientation ^= 1; /* toggle the value of orientation */ |
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} |
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} |
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/* place the exit up/down */ |
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if(RANDOM() %2) |
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{ maze[1][1] = '<'; maze[xsize-2][ysize-2]='>'; } |
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else |
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{ maze[1][1] = '>'; maze[xsize-2][ysize-2]='<'; } |
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return maze; |
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} |
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