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Ingy döt Net 2013-04-10 12:38:42 -07:00
parent 3af7344581
commit 86c034bb8b
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65
Task/Forest-fire/C/forest-fire-2.c Normal file
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#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
enum { empty = 0, tree = 1, fire = 2 };
const char *disp[] = {" ", "\033[32m/\\\033[m", "\033[07;31m/\\\033[m"};
double tree_prob = 0.01, burn_prob = 0.0001;
#define for_x for (int x = 0; x < w; x++)
#define for_y for (int y = 0; y < h; y++)
#define for_yx for_y for_x
#define chance(x) (rand() < RAND_MAX * x)
void evolve(int w, int h)
{
unsigned univ[h][w], new[h][w];
for_yx new[y][x] = univ[y][x] = chance(tree_prob) ? tree : empty;
show: printf("\033[H");
for_y {
for_x printf(disp[univ[y][x]]);
printf("\033[E");
}
fflush(stdout);
for_yx {
switch (univ[y][x]) {
case fire: new[y][x] = empty;
break;
case empty: if (chance(tree_prob)) new[y][x] = tree;
break;
default:
for (int y1 = y - 1; y1 <= y + 1; y1++) {
if (y1 < 0 || y1 >= h) continue;
for (int x1 = x - 1; x1 <= x + 1; x1++) {
if (x1 < 0 || x1 >= w) continue;
if (univ[y1][x1] != fire) continue;
new[y][x] = fire;
goto burn;
}
}
burn:
if (new[y][x] == tree && chance(burn_prob))
new[y][x] = fire;
}
}
for_yx { univ[y][x] = new[y][x]; }
//usleep(100000);
goto show;
}
int main(int c, char **v)
{
//srand(time(0));
int w = 0, h = 0;
if (c > 1) w = atoi(v[1]);
if (c > 2) h = atoi(v[2]);
if (w <= 0) w = 30;
if (h <= 0) h = 30;
evolve(w, h);
}