in_back

Function

in_back(t: float) -> float

Back ease in - pulls back before moving forward

Creates an anticipation effect by briefly moving in the opposite direction before accelerating toward the target. Like pulling back a slingshot or winding up before throwing. Adds personality and life to animations. Use cases: - UI elements that "wind up" before appearing - Character animations with anticipation - Playful button interactions - Adding personality to mechanical movements

Parameters

t: Time factor between 0 and 1

Returns

Eased value that goes slightly negative before reaching 1 Raises: ValueError: If t is not between 0 and 1