Enum Easing

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pub enum Easing {
Show 41 variants    Linear,
    EaseInQuad,
    EaseOutQuad,
    EaseInOutQuad,
    EaseInCubic,
    EaseOutCubic,
    EaseInOutCubic,
    EaseInQuart,
    EaseOutQuart,
    EaseInOutQuart,
    EaseInQuint,
    EaseOutQuint,
    EaseInOutQuint,
    EaseInSine,
    EaseOutSine,
    EaseInOutSine,
    EaseInExpo,
    EaseOutExpo,
    EaseInOutExpo,
    EaseInCirc,
    EaseOutCirc,
    EaseInOutCirc,
    EaseInBack,
    EaseOutBack,
    EaseInOutBack,
    EaseInElastic,
    EaseOutElastic,
    EaseInOutElastic,
    EaseInBounce,
    EaseOutBounce,
    EaseInOutBounce,
    SmoothStep,
    SmootherStep,
    Step,
    EaseOutLinear,
    Hermite {
        p0: f32,
        m0: f32,
        p1: f32,
        m1: f32,
    },
    Power(f32),
    Sigmoid {
        k: f32,
    },
    Spring {
        stiffness: f32,
        damping: f32,
    },
    Parabola,
    Flash,
}

Expand description

An easing function — transforms normalized time t ∈ [0, 1] → output ∈ [0, 1].

For typical usage, In = slow start, Out = slow end, InOut = slow at both ends.

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SmoothStep

Smooth step: 3t² - 2t³ (zero derivative at endpoints).

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SmootherStep

Smoother step: 6t⁵ - 15t⁴ + 10t³ (Perlin’s improved smoothstep).

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Step

Step at threshold 0.5 (instantaneous jump).

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EaseOutLinear

Instant-in, linear-out.

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Hermite

Hermite cubic through two tangents.

Fields

§p0: f32

§m0: f32

§p1: f32

§m1: f32

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Power(f32)

Custom power: t^n.

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Sigmoid

Sigmoid (logistic) curve.

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§k: f32

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Spring

Spring easing (underdamped oscillation to rest).

Fields

§stiffness: f32

§damping: f32

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Parabola

Parabolic arc (projectile).

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Flash

Flash: instant full, then linear decay.

Implementations§

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impl Easing

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

Apply the easing function to normalized time t ∈ [0, 1].

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pub fn derivative(&self, t: f32) -> f32

Return the approximate derivative dE/dt at t using central differences.

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pub fn name(&self) -> &'static str

Name for debug display.

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pub fn all_named() -> &'static [Easing]

All named easings (excludes parameterized variants).

Trait Implementations§

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impl Clone for Easing

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fn clone(&self) -> Easing

Returns a duplicate of the value. Read more

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

Performs copy-assignment from source. Read more

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impl Debug for Easing

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

Formats the value using the given formatter. Read more

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impl PartialEq for Easing

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

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impl Copy for Easing

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impl StructuralPartialEq for Easing

Auto Trait Implementations§

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impl Freeze for Easing

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impl RefUnwindSafe for Easing

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impl Send for Easing

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impl Sync for Easing

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impl Unpin for Easing

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impl UnsafeUnpin for Easing

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impl UnwindSafe for Easing

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)

Performs copy-assignment from self to dest. Read more

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impl<T> Downcast for T
where T: Any,

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fn into_any(self: Box<T>) -> Box<dyn Any>

Convert Box<dyn Trait> (where Trait: Downcast) to Box<dyn Any>. Box<dyn Any> can then be further downcast into Box<ConcreteType> where ConcreteType implements Trait.

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fn into_any_rc(self: Rc<T>) -> Rc<dyn Any>

Convert Rc<Trait> (where Trait: Downcast) to Rc<Any>. Rc<Any> can then be further downcast into Rc<ConcreteType> where ConcreteType implements Trait.

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fn as_any(&self) -> &(dyn Any + 'static)

Convert &Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &Any’s vtable from &Trait’s.

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fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)

Convert &mut Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &mut Any’s vtable from &mut Trait’s.

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impl<T> DowncastSync for T
where T: Any + Send + Sync,

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fn into_any_arc(self: Arc<T>) -> Arc<dyn Any + Sync + Send>

Convert Arc<Trait> (where Trait: Downcast) to Arc<Any>. Arc<Any> can then be further downcast into Arc<ConcreteType> where ConcreteType implements Trait.

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