React Architecture Concept • Core Motion Model
Flutter Physics Animation: Interactive Spring Simulations
Flutter provides a robust physics simulation library (flutter/physics.dart) that allows widgets to react to real physical forces like springs, friction, and gravity. Unlike standard CurvedAnimation which follows static time curves, SpringSimulation dynamically resolves position and velocity, ensuring continuous gesture handling.
SpringSimulation accepts initial velocity in pixels per second, allowing touch flings to naturally transfer physical inertia into the settling animation.
Runnable ExodeUI React Implementation
Production ReadyMount the ExodeUICanvas component and bind parameters declaratively without imperative lifecycle hooks:
import 'package:flutter/material.dart';
import 'package:flutter/physics.dart';
class PhysicsSheet extends StatefulWidget {
@override
_PhysicsSheetState createState() => _PhysicsSheetState();
}
class _PhysicsSheetState extends State<PhysicsSheet> with SingleTickerProviderStateMixin {
late AnimationController _controller;
@override
void initState() {
super.initState();
_controller = AnimationController.unbounded(vsync: this);
}
void _springTo(double target, double initialVelocity) {
// ExodeUI Spring Description
final spring = SpringDescription(mass: 1.0, stiffness: 420.0, damping: 24.0);
final simulation = SpringSimulation(spring, _controller.value, target, initialVelocity);
_controller.animateWith(simulation);
}
@override
Widget build(BuildContext context) {
return GestureDetector(
onVerticalDragEnd: (details) {
_springTo(1.0, details.velocity.pixelsPerSecond.dy / 1000);
},
child: AnimatedBuilder(
animation: _controller,
builder: (context, child) => Transform.translate(
offset: Offset(0, _controller.value * 200),
child: child,
),
child: Container(height: 300, color: Colors.purple),
),
);
}
}Frequently Asked Questions about flutter physics animation
How do I handle interruptible animations in Flutter?
By using AnimationController.unbounded and passing the current position and velocity to a new SpringSimulation when a touch interrupt occurs.