sprung 2.0.0+13 sprung: ^2.0.0+13 copied to clipboard
Spring curves for Flutter animations. Based on real physics equations with three damping curves.
sprung #
Sprung is an easy-to-consume Curve that uses real physics equations to drive your animations.
Easy to consume #
AnimatedContainer(
/// Critically damped by default
curve: Sprung(),
/// ...
),
AnimatedContainer(
/// Easily adjust damping value
curve: Sprung(16),
/// ...
),
AnimatedContainer(
/// Build a custom spring
curve: Sprung(
damping: 20,
stiffness: 180,
mass: 1.0,
),
/// ...
),
Sprung
has three opinionated curves, Sprung.underDamped
, Sprung.criticallyDamped
, and Sprung.overDamped
.
AnimatedContainer(
curve: Sprung.underDamped,
/// ...
),
Based on Physics #
Using Flutter's physics engine which leverages Newton's Second Law of Motion, Hooke's Law, and velocity based damping, we implement the following equation to create realistic spring animations.
Believable motion #
Reliable accuracy #
Sprung exceeds Flutter specifications for curves by guaranteeing an error less than 1e-6
. This amounts to a 0.0019px
jitter at the beginning or end of a 1920px
move.