Easing Functions

Easing Functions

DisplayAPI provides 12 easing functions that control the acceleration and deceleration of animations.

Available Easings

Easing	Description	Best For
LINEAR	Constant speed	Spin, continuous motion
EASE_IN	Starts slow, ends fast	Exit animations
EASE_OUT	Starts fast, ends slow	Entrance animations
EASE_IN_OUT	Slow start and end	Pulse, floating
CUBIC_IN	Stronger ease-in	Dramatic starts
CUBIC_OUT	Stronger ease-out	Dramatic stops
CUBIC_IN_OUT	Stronger both ends	Smooth transitions
QUART_IN	Very strong ease-in	Heavy objects
QUART_OUT	Very strong ease-out	Snappy stops
QUART_IN_OUT	Very strong both	Dramatic motion
EASE_IN_BACK	Pulls back then accelerates	Wind-up effect
EASE_OUT_BACK	Overshoots then settles	Bouncy arrival
BOUNCE	Bounces at the end	Drop + bounce
ELASTIC	Elastic overshoot	Spring-like motion

Usage

DisplayAPI.animate(display)
    .keyframe(Keyframe.at(0).scale(0f))
    .keyframe(Keyframe.at(20).scale(1f))
    .easing(Easing.EASE_OUT_BACK)    // Overshoot then settle
    .play();

Visual Reference

LINEAR:        ─────────────── (constant)
EASE_IN:       ........──────── (slow → fast)
EASE_OUT:      ────────........ (fast → slow)
EASE_IN_OUT:   ....────────.... (slow → fast → slow)
BOUNCE:        ────╮ ╭╮╭─      (bounces at end)
ELASTIC:       ────~≈~─        (springs back and forth)
EASE_OUT_BACK: ──────╮╭─       (overshoots then returns)

Pre-built Animation Defaults

Animation	Default Easing
pulse()	EASE_IN_OUT
spin()	LINEAR
bounce()	BOUNCE
floating()	EASE_IN_OUT
fadeIn()	EASE_OUT
fadeOut()	EASE_IN
growIn()	EASE_OUT_BACK
shake()	LINEAR