Ease In/Out

Overview

Adds acceleration and deceleration to motion. It takes progress from 0 to 1 and converts it into a curve with acceleration, deceleration, or bounce. Back modes intentionally overshoot below 0 or above 1. Constant-speed linear motion looks mechanical, so UI slide-ins and object movement almost always benefit from this node.

Usage tips

• Insert it immediately after progress: time_source → ease_in_out → remap → parameter.
• Choose the mode by intent:
  • Movement or slide-in → EaseOut (starts quickly and comes to a stop)
  • Charge, then launch → EaseIn / ExpoIn
  • Natural back-and-forth motion → EaseInOut (default)
  • Bouncy landing → BounceOut; overshoot, then return → BackOut
• Use power to control the curve strength (2 = standard, 5 = very steep).
• This easing vocabulary (names and curves) is shared with the per-track interpolation of keyframe_clip; clip interpolation evaluates the same curves (equivalent to power=2).

Common pitfalls

• Passing values outside 0–1: input is clamped to 0–1. To ease the full range of a waveform from -1 to 1, convert it to 0–1 with remap first.
• It seems ineffective after motion (Wobble): a sine wave already contains acceleration and deceleration. Easing is primarily for progress → one-shot motion; combine it with periodic waveforms only deliberately.

Easing modes

power parameter

Used by EaseIn, EaseOut, and EaseInOut. Larger values produce a steeper curve.

• power=2.0 — quadratic curve (standard)
• power=3.0 — cubic curve (slightly stronger)
• power=5.0 — quintic curve (very steep)

Examples

• TimeSource → EaseInOut → Remap → parameter — smooth acceleration/deceleration animation
• Combine ease_in + ease_out to build an asymmetric curve

Related nodes

• remap — change the range after easing
• automation_curve — draw a free curve when the nine modes are not enough
• keyframe_clip — build motion from keyframes
• time_source — supplies input progress