Trait palette::GetHue [] [src]

pub trait GetHue {
    type Hue;
    fn get_hue(&self) -> Option<Self::Hue>;

A trait for colors where a hue may be calculated.

use palette::{Rgb, GetHue};

let red = Rgb::new(1.0f32, 0.0, 0.0);
let green = Rgb::new(0.0f32, 1.0, 0.0);
let blue = Rgb::new(0.0f32, 0.0, 1.0);
let gray = Rgb::new(0.5f32, 0.5, 0.5);

assert_eq!(red.get_hue(), Some(0.0.into()));
assert_eq!(green.get_hue(), Some(120.0.into()));
assert_eq!(blue.get_hue(), Some(240.0.into()));
assert_eq!(gray.get_hue(), None);

Associated Types

The kind of hue unit this color space uses.

The hue is most commonly calculated as an angle around a color circle and may not always be uniform between color spaces. It's therefore not recommended to take one type of hue and apply it to a color space that expects an other.

Required Methods

Calculate a hue if possible.

Colors in the gray scale has no well defined hue and should preferably return None.