flutter pub add sprung根據套件公開資料產生的選型評估，僅供參考。
Sprung 是一個 Flutter 套件，提供基於物理的彈簧曲線，用於實現平滑、真實的動畫。受到現實世界物理的啟發，它實作了三種阻尼曲線來模擬自然運動。非常適合用於按鈕、滑桿和轉場等互動式 UI 元件，Sprung 透過擬真反應性提升使用者體驗。此套件可無縫整合至 Flutter 專案中，並支援所有主要平台，包括行動裝置、網頁與桌面端。專為希望精確控制動畫動態，而不需複雜手動計算的開發者設計。
以下為關聯原始碼儲存庫的 README 原文快照，最新內容請造訪原始碼儲存庫。
Sprung is an easy-to-consume Curve that uses real physics equations to drive your animations.
Sprung has three opinionated curves, Sprung.underDamped, Sprung.criticallyDamped, and Sprung.overDamped. This is the best way to get started.
AnimatedContainer(
curve: Sprung.underDamped,
/// ...
),
When you want more fine control, use the default constructor which is critically damped, with overridable damping value.
AnimatedContainer(
/// Critically damped by default with a value of `20`
curve: Sprung(),
/// ...
),
AnimatedContainer(
/// Easily adjust damping value.
curve: Sprung(19),
/// ...
),
To build a fully custom spring simulation, use Sprung.custom. This allows you to define the spring's damping and stiffness, as well as the mass' mass and initial velocity.
AnimatedContainer(
/// Build a custom spring
curve: Sprung.custom(
damping: 20,
stiffness: 180,
mass: 1.0,
velocity: 0.0,
),
/// ...
),
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.
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.