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Spring curves for Flutter based on physics equations

sprung #

Sprung is an easy-to-consume Curve that uses real physics equations to drive your animations.

Easy to consume #

AnimatedContainer(
  curve: Sprung(),
  /// ...
),

Sprung() also supports three damping curves, Damped.under, Damped.critically, and Damped.over.

AnimatedContainer(
  curve: Sprung(
    damped: Damped.under
  ),
  /// ...
),

Note: Sprung is critically damped by default.

Based on Physics #

Using Newton's Second Law of Motion, Hooke's Law, and velocity based damping, we implement the following equation in three finite cases.

m times x dot dot equals negative k times parenthesis x minus 1 close parenthesis minus c times x dot

Believable Motion #

demo of under, critically, and over damped Flutter curves

Reliable #

All curves are subjected to unit tests and gaurantee an epsilon of 5e-3

Prior Art #

https://medium.com/@dtinth/spring-animation-in-css-2039de6e1a03

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verified publisherlukepighetti.com

Spring curves for Flutter based on physics equations

Repository (GitHub)
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License

unknown (LICENSE)

Dependencies

cupertino_icons, flutter

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