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use flo_curves::bezier::Curve;
use flo_curves::*;
use lazy_static::lazy_static;
use std::borrow::Cow;
lazy_static! {
pub static ref EXAMPLES: [Easing; 3] = [
Easing::CubicBezier(Curve::from_points(
Coord2(0.0, 0.0),
(Coord2(0.05, 0.7), Coord2(0.1, 1.0)),
Coord2(1.0, 1.0),
)),
Easing::CubicBezier(Curve::from_points(
Coord2(0.0, 0.0),
(Coord2(0.3, 0.0), Coord2(0.8, 0.15)),
Coord2(1.0, 1.0),
)),
Easing::CubicBezier(Curve::from_points(
Coord2(0.0, 0.0),
(Coord2(0.2, 0.0), Coord2(0.0, 1.0)),
Coord2(1.0, 1.0),
))
];
pub static ref STANDARD: Easing = {
Easing::CubicBezier(Curve::from_points(
Coord2(0.0, 0.0),
(Coord2(0.2, 0.0), Coord2(0.0, 1.0)),
Coord2(1.0, 1.0),
))
};
}
#[derive(Clone, Debug)]
pub enum Easing {
BezierPath(Vec<Curve<Coord2>>),
CubicBezier(Curve<Coord2>),
}
impl Easing {
pub fn y_at_x(&self, x: f32) -> f32 {
let x = x as f64;
match self {
Self::BezierPath(curves) => curves
.iter()
.find_map(|curve| {
(curve.start_point().0 <= x && curve.end_point().0 >= x)
.then(|| curve.point_at_pos(x).1 as f32)
})
.unwrap_or_default(),
Self::CubicBezier(curve) => curve.point_at_pos(x).1 as f32,
}
}
}
impl<'a> From<Easing> for Cow<'a, Easing> {
fn from(easing: Easing) -> Self {
Cow::Owned(easing)
}
}
impl<'a> From<&'a Easing> for Cow<'a, Easing> {
fn from(easing: &'a Easing) -> Self {
Cow::Borrowed(easing)
}
}
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