Module easing 

All easing functions for the Animato animation library.

Two ways to use easing:

1. Easing enum — storable, passable, optionally serializable:

   use animato_core::Easing;
   let e = Easing::EaseOutCubic;
   let v = e.apply(0.5);

2. Free functions — zero-overhead, inlined at call site:

   use animato_core::easing::ease_out_cubic;
   let v = ease_out_cubic(0.5);

Invariants

All named variants satisfy:

• apply(0.0) == 0.0
• apply(1.0) == 1.0
• t outside [0.0, 1.0] is clamped — no panic

Enums

Easing

All 31 classic easing variants, CSS-compatible parameterized variants, and an escape-hatch Custom function pointer.

Functions

cubic_bezier

CSS-compatible cubic Bezier easing.

custom_bounce

Configurable bounce easing.

ease_in_back

Back ease-in — overshoots slightly then pulls back.

ease_in_bounce

Bounce ease-in.

ease_in_circ

Circular ease-in.

ease_in_cubic

Cubic ease-in: t³

ease_in_elastic

Elastic ease-in — spring-like oscillation at the beginning.

ease_in_expo

Exponential ease-in.

ease_in_out_back

Back ease-in-out.

ease_in_out_bounce

Bounce ease-in-out.

ease_in_out_circ

Circular ease-in-out.

ease_in_out_cubic

Cubic ease-in-out.

ease_in_out_elastic

Elastic ease-in-out.

ease_in_out_expo

Exponential ease-in-out.

ease_in_out_quad

Quadratic ease-in-out.

ease_in_out_quart

Quartic ease-in-out.

ease_in_out_quint

Quintic ease-in-out.

ease_in_out_sine

Sinusoidal ease-in-out.

ease_in_quad

Quadratic ease-in: t²

ease_in_quart

Quartic ease-in: t⁴

ease_in_quint

Quintic ease-in: t⁵

ease_in_sine

Sinusoidal ease-in.

ease_out_back

Back ease-out — overshoots the target then settles.

ease_out_bounce

Bounce ease-out — ball bouncing to rest.

ease_out_circ

Circular ease-out.

ease_out_cubic

Cubic ease-out: 1 - (1-t)³

ease_out_elastic

Elastic ease-out — spring-like oscillation at the end.

ease_out_expo

Exponential ease-out.

ease_out_quad

Quadratic ease-out: 1 - (1-t)²

ease_out_quart

Quartic ease-out: 1 - (1-t)⁴

ease_out_quint

Quintic ease-out: 1 - (1-t)⁵

ease_out_sine

Sinusoidal ease-out.

expo_scale

Exponential scale easing: warps time according to an exponential curve.

rough_ease

Rough, organic easing using deterministic sine harmonics.

slow_mo

Slow-motion easing: fast at edges, slow in the middle.

steps

CSS steps(n, jump-end) easing.

wiggle

Wiggle easing: oscillates around the linear trend with a sine envelope.