Enum Easing

pub enum Easing {
    Linear,
    Ease,
    In,
    Out,
    InOut,
    InSine,
    OutSine,
    InOutSine,
    InQuad,
    OutQuad,
    InOutQuad,
    InCubic,
    OutCubic,
    InOutCubic,
    InQuart,
    OutQuart,
    InOutQuart,
    InQuint,
    OutQuint,
    InOutQuint,
    InExpo,
    OutExpo,
    InOutExpo,
    InCirc,
    OutCirc,
    InOutCirc,
    InBack,
    OutBack,
    InOutBack,
    Custom(Box<dyn EasingFunction>),
}

Specifies a standard or custom EasingFunction.

Available easings include:

• CSS standard: Ease, In, Out, InOut corresponding to ease, ease-in, ease-out and ease-in-out
• Common easings that can be implemented with a cubic bezier function, i.e. the majority of functions listed on https://easings.net except for the “elastic” and “bounce” types.
• User-defined functions via Custom.

Variants

Linear

Linear easing, i.e. no easing or curve, only straight-line interpolation.

Ease

Curve equivalent to CSS ease.

In

Curve equivalent to CSS ease-in.

Out

Curve equivalent to CSS ease-out.

InOut

Curve equivalent to CSS ease-in-out.

InSine

Sinusoidal easing that starts slowly and ends quickly. Subtle, almost linear curve.

See: https://easings.net/#easeInSine

OutSine

Sinusoidal easing that starts quickly and ends slowly. Subtle, almost linear curve.

See: https://easings.net/#easeOutSine

InOutSine

Sinusoidal easing that starts slowly, speeds up, and then ends slowly. Subtle, almost linear curve.

See: https://easings.net/#easeInOutSine

InQuad

Quadratic (^2) easing that starts slowly and ends quickly. Slightly steeper curve than InSine.

See: https://easings.net/#easeInQuad

OutQuad

Quadratic (^2) easing that starts quickly and ends slowly. Slightly steeper curve than OutSine.

See: https://easings.net/#easeOutQuad

InOutQuad

Quadratic (^2) easing that starts slowly, speeds up, and then ends slowly. Slightly steeper curve than InOutSine.

See: https://easings.net/#easeInOutQuad

InCubic

Cubic (^3) easing that starts slowly and ends quickly. Slightly steeper curve than InQuad.

See: https://easings.net/#easeInCubic

OutCubic

Cubic (^3) easing that starts quickly and ends slowly. Slightly steeper curve than OutQuad.

See: https://easings.net/#easeOutCubic

InOutCubic

Cubic (^3) easing that starts slowly, speeds up, and then ends slowly. Slightly steeper curve than InOutQuad.

See: https://easings.net/#easeInOutCubic

InQuart

Quartic (^4) easing that starts slowly and ends quickly. Slightly steeper curve than InCubic.

See: https://easings.net/#easeInQuart

OutQuart

Quartic (^4) easing that starts quickly and ends slowly. Slightly steeper curve than OutCubic.

See: https://easings.net/#easeOutQuart

InOutQuart

Quartic (^4) easing that starts slowly, speeds up, and then ends slowly. Slightly steeper curve than InOutCubic.

See: https://easings.net/#easeInOutQuart

InQuint

Quintic (^5) easing that starts slowly and ends quickly. Slightly steeper curve than InQuart.

See: https://easings.net/#easeInQuint

OutQuint

Quintic (^5) easing that starts quickly and ends slowly. Slightly steeper curve than OutQuart.

See: https://easings.net/#easeOutQuint

InOutQuint

Quintic (^5) easing that starts slowly, speeds up, and then ends slowly. Slightly steeper curve than InOutQuart.

See: https://easings.net/#easeInOutQuint

InExpo

Exponential easing that starts slowly and ends quickly. Steeper curve than InQuint and generally only suitable for long animations/frames.

See: https://easings.net/#easeInExpo

OutExpo

Exponential easing that starts quickly and ends slowly. Steeper curve than OutQuint and generally only suitable for long animations/frames.

See: https://easings.net/#easeOutExpo

InOutExpo

Exponential easing that starts slowly, speeds up, and then ends slowly. Steeper curve than InOutQuint and generally only suitable for long animations/frames.

See: https://easings.net/#easeInOutExpo

InCirc

A curve that looks like the lower-right quarter of a circle. Starts slowly, and speeds up dramatically. Generally only suitable for long animations/frames.

See: https://easings.net/#easeInCirc

OutCirc

A curve that looks like the upper-left quarter of a circle. Starts very quickly, and decelerates dramatically. Generally only suitable for long animations/frames.

See: https://easings.net/#easeOutCirc

InOutCirc

A curve that looks like the lower-right quarter of a circle connected to the upper-left quarter of a circle. Starts very slowly, accelerates dramatically, and ends very slowly. dramatically. Generally only suitable for long animations/frames.

See: https://easings.net/#easeInOutCirc

InBack

A curve that has similar timing to InExpo but moves slightly backward (negative) before accelerating forward.

See: https://easings.net/#easeInBack

OutBack

A curve that has similar timing to OutExpo but overshoots the terminal value (i.e. goes above 1.0) before decelerating backward and settling at the final value.

See: https://easings.net/#easeOutBack

InOutBack

A curve that has similar timing to InOutExpo but moves slightly backward (negative) before accelerating forward and also overshoots the terminal value (i.e. goes above 1.0) before decelerating backward and settling at the final value.

See: https://easings.net/#easeInOutBack

Custom(Box<dyn EasingFunction>)

User-defined easing, such as an ad-hoc CubicBezierEasing.

Trait Implementations

impl Clone for Easing

fn clone(&self) -> Easing

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Easing

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

Formats the value using the given formatter.

impl Default for Easing

fn default() -> Easing

Returns the “default value” for a type.

impl EasingFunction for Easing

fn calc(&self, x: f32) -> f32

Computes the y value along the curve for a given x position.