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use crate::*;
#[derive(Copy, Clone)]
pub struct Proportion<T: Internal> {
pub(crate) value: T,
}
impl<I: Internal> Proportion<I> {
pub fn new(value: I) -> Self {
Self { value: value.clamp() }
}
pub const MIN: Self = Proportion {
value: <I as Internal>::MIN,
};
pub const MAX: Self = Proportion {
value: <I as Internal>::MAX,
};
pub const ZERO: Self = Self::MIN;
pub const ONE: Self = Self::MAX;
pub fn set(&mut self, new_value: I) {
self.value = new_value.clamp();
}
pub fn is_min(&self) -> bool {
self.value == I::MIN
}
pub fn is_max(&self) -> bool {
self.value == I::MAX
}
pub fn is_zero(&self) -> bool {
self.is_min()
}
pub fn is_one(&self) -> bool {
self.is_max()
}
pub fn as_u8(&self) -> u8 {
self.value.as_u8()
}
pub fn as_f32(&self) -> f32 {
self.value.as_f32()
}
pub fn as_f64(&self) -> f64 {
self.value.as_f64()
}
pub fn invert(&self) -> Self {
Self {
value: I::MAX - self.value,
}
}
pub fn value(&self) -> I {
self.value
}
}
macro_rules! impl_mul {
($type:ty, $method:ident) => {
impl<I: Internal> std::ops::Mul<Proportion<I>> for $type {
type Output = $type;
fn mul(self, proportion: Proportion<I>) -> $type {
proportion.value.$method(self)
}
}
impl<I: Internal> std::ops::Mul<$type> for Proportion<I> {
type Output = $type;
fn mul(self, value: $type) -> $type {
self.value.$method(value)
}
}
impl<I: Internal> std::ops::Mul<&Proportion<I>> for $type {
type Output = $type;
fn mul(self, proportion: &Proportion<I>) -> $type {
proportion.value.$method(self)
}
}
impl<I: Internal> std::ops::Mul<$type> for &Proportion<I> {
type Output = $type;
fn mul(self, value: $type) -> $type {
self.value.$method(value)
}
}
};
}
impl_mul!(u8, mul_u8);
impl_mul!(u16, mul_u16);
impl_mul!(u32, mul_u32);
impl_mul!(f32, mul_f32);
impl_mul!(f64, mul_f64);
use std::fmt::{Debug, Display, Formatter};
impl<T: Internal> Debug for Proportion<T> {
fn fmt(&self, f: &mut Formatter) -> Result<(), std::fmt::Error> {
write!(f, "Proportion {{ {:.2} }}", self.as_f32())
}
}
impl<T: Internal> Display for Proportion<T> {
fn fmt(&self, f: &mut Formatter) -> Result<(), std::fmt::Error> {
write!(f, "{:.2}", self.as_f32())
}
}
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