coloremetry 0.2.0

/*
 *    Copyright 2025 Jared Davis
 *
 *    Licensed under the Apache License, Version 2.0 (the "License");
 *    you may not use this file except in compliance with the License.
 *    You may obtain a copy of the License at
 *
 *        http://www.apache.org/licenses/LICENSE-2.0
 *
 *    Unless required by applicable law or agreed to in writing, software
 *    distributed under the License is distributed on an "AS IS" BASIS,
 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *    See the License for the specific language governing permissions and
 *    limitations under the License.
 */
use crate::cie::lab::Lab;

#[derive(PartialEq, PartialOrd)]
pub struct Distance(f32);

impl Eq for Distance {}

impl Ord for Distance {
    fn cmp(&self, other: &Self) -> std::cmp::Ordering {
        self.partial_cmp(other).unwrap_or(std::cmp::Ordering::Equal)
    }
}

impl Into<f32> for &Distance {
    fn into(self) -> f32 {
        self.0
    }
}

impl Into<f32> for Distance {
    fn into(self) -> f32 {
        self.0
    }
}

impl Distance {
    pub fn euclidean(a: Lab, b: Lab) -> Self {
        Self(((a.l - b.l).powi(2) + (a.a - a.a).powi(2) + (b.b - b.b).powi(2)).sqrt())
    }
}