76 lines
1.3 KiB
C
76 lines
1.3 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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int w = 0, h = 0;
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unsigned char *pix;
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void refresh(int x, int y)
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{
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int i, j, k;
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printf("\033[H");
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for (i = k = 0; i < h; putchar('\n'), i++)
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for (j = 0; j < w; j++, k++)
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putchar(pix[k] ? '#' : ' ');
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}
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void walk()
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{
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int dx = 0, dy = 1, i, k;
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int x = w / 2, y = h / 2;
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pix = calloc(1, w * h);
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printf("\033[H\033[J");
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while (1) {
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i = (y * w + x);
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if (pix[i]) k = dx, dx = -dy, dy = k;
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else k = dy, dy = -dx, dx = k;
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pix[i] = !pix[i];
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printf("\033[%d;%dH%c", y + 1, x + 1, pix[i] ? '#' : ' ');
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x += dx, y += dy;
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k = 0;
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if (x < 0) {
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memmove(pix + 1, pix, w * h - 1);
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for (i = 0; i < w * h; i += w) pix[i] = 0;
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x++, k = 1;
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}
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else if (x >= w) {
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memmove(pix, pix + 1, w * h - 1);
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for (i = w-1; i < w * h; i += w) pix[i] = 0;
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x--, k = 1;
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}
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if (y >= h) {
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memmove(pix, pix + w, w * (h - 1));
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memset(pix + w * (h - 1), 0, w);
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y--, k = 1;
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}
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else if (y < 0) {
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memmove(pix + w, pix, w * (h - 1));
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memset(pix, 0, w);
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y++, k = 1;
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}
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if (k) refresh(x, y);
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printf("\033[%d;%dH\033[31m@\033[m", y + 1, x + 1);
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fflush(stdout);
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usleep(10000);
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}
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}
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int main(int c, char **v)
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{
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if (c > 1) w = atoi(v[1]);
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if (c > 2) h = atoi(v[2]);
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if (w < 40) w = 40;
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if (h < 25) h = 25;
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walk();
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return 0;
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}
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