rust_3d/

has_distance_to.rs

/*
Copyright 2017 Martin Buck

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rights to use, copy, modify, merge, publish, distribute, sublicense,
and/or sell copies of the Software, and to permit persons to whom the Software
is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall
be included all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
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*/

//! HasDistanceTo trait used for types which have a defined distance towards another T.
//! Implementing HasDistanceTo<T> for U also implements HasDistanceTo<U> for T

use crate::*;

//------------------------------------------------------------------------------

/// HasDistanceTo trait used for types which have a defined distance towards another T.
/// Implementing HasDistanceTo<T> for U also implements HasDistanceTo<U> for T
pub trait HasDistanceTo<T> {
    /// Should return the sqr distance to other
    fn sqr_distance(&self, other: &T) -> NonNegative;
    /// The distance to other
    fn distance(&self, other: &T) -> NonNegative {
        self.sqr_distance(other).sqrt()
    }
}