donut.c3:
module example;
import std::math;
import std::io;
import std::thread;
import libc;
fn void main()
{
float a1 = 0;
float b1 = 0;
float i;
float j;
int k;
float[1760] z;
char[1760] b;
io::printf("\x1b[2J");
while (true)
{
// Initialize arrays
for (k = 0; k < 1760; k++)
{
b[k] = ' ';
z[k] = 0;
}
for (j = 0; j < 6.28; j += 0.07)
{
for (i = 0; i < 6.28; i += 0.02)
{
float c = math::sin(i);
float d = math::cos(j);
float e = math::sin(a1);
float f = math::sin(j);
float g = math::cos(a1);
float h = d + 2;
float d2 = 1 / (c * h * e + f * g + 5);
float l = math::cos(i);
float m = math::cos(b1);
float n = math::sin(b1);
float t = c * h * g - f * e;
int x = 40 + (int)(30 * d2 * (l * h * m - t * n));
int y = 12 + (int)(15 * d2 * (l * h * n + t * m));
int o = x + 80 * y;
int n2 = (int)(8 * ((f * e - c * d * g) * m - c * d * e - f * g - l * d * n));
if (y > 0 && y < 22 && x > 0 && x < 80 && d2 > z[o])
{
z[o] = d2;
b[o] = n2 > 0 ? ".,-~:;=!*#$@"[n2] : ".,-~:;=!*#$@"[0];
}
}
}
io::printf("\x1b[H");
for (k = 0; k < 1761; k++)
{
libc::putchar(k % 80 ? b[k] : 10);
}
a1 += 0.04;
b1 += 0.02;
thread::sleep_ms(30); // Replace usleep with thread::sleep_ms
}
}