rust_minifb/examples/noise.rs

extern crate minifb;

const WIDTH: usize = 640;
const HEIGHT: usize = 360;

fn main() {
    let mut noise;
    let mut carry;
    let mut seed = 0xbeefu32;

    let mut buffer: [u32; WIDTH * HEIGHT] = [0; WIDTH * HEIGHT];

    if !(minifb::open("Noise Test - Press ESC to exit", WIDTH, HEIGHT)) {
        return;
    }

    while minifb::update(&buffer) {
        for i in buffer.iter_mut() {
            noise = seed;
            noise >>= 3;
            noise ^= seed;
            carry = noise & 1;
            noise >>= 1;
            seed >>= 1;
            seed |= carry << 30;
            noise &= 0xFF;
            *i = (noise << 16) | (noise << 8) | noise;
        }
    }

    minifb::close();
}