Enum Easing 

pub enum Easing {
    Linear,
    EaseInQuad,
    EaseOutQuad,
    EaseInOutQuad,
    EaseInCubic,
    EaseOutCubic,
    EaseInOutCubic,
    EaseInSine,
    EaseOutSine,
    EaseInOutSine,
    EaseOutElastic,
    EaseOutBounce,
}

A normalized easing curve: reshapes a linear progress fraction (0.0..=1.0) into an eased one, the same named curves as CSS transitions and https://easings.net.

Linear is the default. The In variants start slow, Out variants end slow, and InOut variants do both (matching the usual naming convention: “In” describes the start of the motion, not a direction).

EaseOutElastic and EaseOutBounce are the only curves in their families: both are used for a settle/overshoot effect at the end of a motion, and the in/in-out variants (the same shape mirrored to the start) are uncommon enough in practice that this curated set omits them.

Variants

Linear

Constant speed: t unchanged.

EaseInQuad

Starts slow, accelerates, quadratically.

EaseOutQuad

Starts fast, decelerates, quadratically.

EaseInOutQuad

Slow -> fast -> slow, quadratically.

EaseInCubic

Starts slow, accelerates, cubically – a stronger version of EaseInQuad.

EaseOutCubic

Starts fast, decelerates, cubically – a stronger version of EaseOutQuad.

EaseInOutCubic

Slow -> fast -> slow, cubically – a stronger version of EaseInOutQuad.

EaseInSine

A gentle sine-shaped start.

EaseOutSine

A gentle sine-shaped end.

EaseInOutSine

A gentle sine-shaped start and end.

EaseOutElastic

Springs past the target and oscillates back before settling, going outside 0.0..=1.0 for part of the curve.

EaseOutBounce

Bounces (like a dropped ball) to a stop at the target.

Implementations

impl Easing

pub fn apply(self, t: f32) -> f32

Applies this curve to t (clamped to 0.0..=1.0 first), returning the eased fraction.

Trait Implementations

impl Clone for Easing

fn clone(&self) -> Easing

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for Easing

impl Debug for Easing

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for Easing

fn default() -> Easing

Returns the “default value” for a type.

impl Eq for Easing

impl Hash for Easing

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for Easing

fn eq(&self, other: &Easing) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for Easing