#include "lib2.h"

int w = 80;
int h = 25;

int val(double hz, double sec, int n)
{
	double a = 2 * M_PI * hz * sec;
	return ( sin(a) + 1 ) * 0.5 * n;
}

void step(double hz_x, double hz_y, double sec, double prev)
{
	int x = val(hz_x, sec, w);
	int y = val(hz_y, sec, h);
	int ox = val(hz_x, prev, w);
	int oy = val(hz_y, prev, h);
	if (x == ox && y == oy) return;
	show_xy_str(ox, oy, " ");
	show_xy_str(x, y, "@");
}

int main(int ac, char **av)
{
	int n = 5, m = 3, i, j, run_sec = 10;
	double hz = 100;
	double hz_x[] = {0.23, 0.33, 0.41};
	double hz_y[] = {0.49, 0.19, 0.31};
	double t = 1.0 / hz, ela, nt = 1;
	double sta = sys_sec(), sec, prev = 0;

	w = opt_int("-w", ac, av, w);
	h = opt_int("-h", ac, av, h);
	run_sec = opt_int("-sec", ac, av, run_sec);

	cls();
	while ((sec = sys_sec() - sta) < run_sec) {
		for (i=0; i<m; i++){
			for (j=0; j<n; j++){
				double add = nt * j / n;
				step(hz_x[i], hz_y[i], sec + add, prev + add);
			}
		}
		ela = sec - prev;
		if (ela < t) sys_sleep(t - ela);
		prev = sec;
	}
	cls();
	return 0;
}