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use super::{Noise, NoiseDomain, Seedable, noise::Seeded};
use core::marker::PhantomData;
pub type Config<Noise> = <Noise as Seeded>::Config;
pub trait SeedOnlyNoise {
type Seed;
type Value;
fn seed(seed: Self::Seed) -> Self;
}
#[derive(Copy, Clone)]
pub struct EmptyConfig<Noise: SeedOnlyNoise> {
_phantom: PhantomData<fn(Noise::Seed) -> Noise>,
}
impl<Noise: SeedOnlyNoise> EmptyConfig<Noise> {
pub fn new() -> Self {
Self { _phantom: PhantomData }
}
}
impl<Noise: SeedOnlyNoise> Seedable for EmptyConfig<Noise> {
type Seed = Noise::Seed;
type Seeded = Noise;
fn seed(self, seed: Self::Seed) -> Self::Seeded {
Self::Seeded::seed(seed)
}
}
impl<TNoise: SeedOnlyNoise> Noise for TNoise {
type Value = TNoise::Value;
type Unseeded = EmptyConfig<TNoise>;
}
impl<Noise: SeedOnlyNoise> Seeded for Noise {
type Config = EmptyConfig<Noise>;
}
#[derive(Copy, Clone)]
pub struct IgnoreSeed<Seed, Inner> {
inner: Inner,
_phantom: PhantomData<fn(Seed) -> Self>,
}
impl<Seed, Inner: Noise> Noise for IgnoreSeed<Seed, Inner> {
type Value = Inner::Value;
type Unseeded = Self;
}
impl<Seed, Inner> IgnoreSeed<Seed, Inner> {
pub fn new(inner: Inner) -> Self {
Self { inner, _phantom: PhantomData }
}
}
impl<Seed, Inner> Seedable for IgnoreSeed<Seed, Inner> {
type Seed = Seed;
type Seeded = Self;
fn seed(self, _: Self::Seed) -> Self {
self
}
}
impl<Seed, Inner> Seeded for IgnoreSeed<Seed, Inner> {
type Config = Self;
}
impl<Arg, Seed, Inner: NoiseDomain<Arg>> NoiseDomain<Arg> for IgnoreSeed<Seed, Inner> {
fn noise(&self, arg: Arg) -> Self::Value {
self.inner.noise(arg)
}
}