67 lines
1.0 KiB
C
67 lines
1.0 KiB
C
#include "grid.h"
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#include "tiles.h"
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#include <gint/std/stdlib.h>
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void
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grid_random_walker(struct Grid *restrict grid)
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{
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int x;
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int y;
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int i;
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int roll;
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/* fill with walls */
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i = grid->width * grid->height;
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while (i-- > 0)
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grid->data[i] = TILE_SOLID;
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/* dig our way to the right */
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x = 0;
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y = grid->height / 2;
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while (x < grid->width) {
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roll = rand() % 8;
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grid_set(grid, x, y, roll ? TILE_VOID : TILE_OBSTACLE_3);
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roll = rand() % 9;
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switch (roll) {
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case 0:
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case 1:
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case 2:
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/* right */
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x += 1;
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break;
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case 3:
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case 4:
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/* up */
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y -= 1;
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if (y < 0)
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y = grid->height - 1;
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break;
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case 5:
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case 6:
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/* down */
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y += 1;
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if (y >= grid->height)
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y = 0;
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break;
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case 7:
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case 8:
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/* left */
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x -= 1;
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if (x < 0)
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x = 0;
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break;
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default:
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break;
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}
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}
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/* place resting points */
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for (x = 64; x < grid->width; x += 64) {
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for (y = 0; y < grid->height; y += 1) {
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if (!grid_get(*grid, x, y))
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break;
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}
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grid_set(grid, x, y, TILE_ZONE_TRANSITION);
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}
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}
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