pub struct DeterministicRng {
count: usize,
x: u32,
y: u32,
z: u32,
w: u32,
}
impl DeterministicRng {
pub fn new() -> Self {
DeterministicRng {
count: 0,
x: 0x193a6754,
y: 0xa8a7d469,
z: 0x97830e05,
w: 0x113ba7bb,
}
}
pub fn next(&mut self) -> u32 {
self.count += 1;
assert!(self.count <= 70029);
let x = self.x;
let t = x ^ (x << 11);
self.x = self.y;
self.y = self.z;
self.z = self.w;
let w_ = self.w;
self.w = w_ ^ (w_ >> 19) ^ (t ^ (t >> 8));
self.w
}
}