metaballs 1.4.2
metaballs: ^1.4.2 copied to clipboard
A metaballs implementation for flutter using webgl on the web and the shader package on other devices
import 'package:flutter/material.dart';
import 'package:metaballs/metaballs.dart';
class ColorsEffectPair {
final List<Color> colors;
final MetaballsEffect? effect;
final String name;
ColorsEffectPair({
required this.colors,
required this.name,
required this.effect,
});
}
List<ColorsEffectPair> colorsAndEffects = [
ColorsEffectPair(
colors: [
const Color.fromARGB(255, 255, 21, 0),
const Color.fromARGB(255, 255, 153, 0),
],
effect: MetaballsEffect.follow(),
name: 'FOLLOW'
),
ColorsEffectPair(
colors: [
const Color.fromARGB(255, 0, 255, 106),
const Color.fromARGB(255, 255, 251, 0),
],
effect: MetaballsEffect.grow(),
name: 'GROW'
),
ColorsEffectPair(
colors: [
const Color.fromARGB(255, 90, 60, 255),
const Color.fromARGB(255, 120, 255, 255),
],
effect: MetaballsEffect.speedup(),
name: 'SPEEDUP'
),
ColorsEffectPair(
colors: [
const Color.fromARGB(255, 255, 60, 120),
const Color.fromARGB(255, 237, 120, 255),
],
effect: MetaballsEffect.ripple(),
name: 'RIPPLE'
),
ColorsEffectPair(
colors: [
const Color.fromARGB(255, 120, 217, 255),
const Color.fromARGB(255, 255, 234, 214),
],
effect: null,
name: 'NONE'
),
];
void main() {
// enable dithering to smooth out the gradients and metaballs
Paint.enableDithering = true;
runApp(const MyApp());
}
class MyApp extends StatelessWidget {
const MyApp({Key? key}) : super(key: key);
// This widget is the root of your application.
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Metaballs Demo',
theme: ThemeData.dark(),
home: const HomePage(),
debugShowCheckedModeBanner: false,
);
}
}
class HomePage extends StatefulWidget {
const HomePage({Key? key}) : super(key: key);
@override
State<HomePage> createState() => _HomePageState();
}
class _HomePageState extends State<HomePage> {
int colorEffectIndex = 0;
@override
Widget build(BuildContext context) {
double width = MediaQuery.of(context).size.width;
return Material(
child: GestureDetector(
onDoubleTap: () {
setState(() {
colorEffectIndex=(colorEffectIndex+1)%colorsAndEffects.length;
});
},
child: Container(
decoration: const BoxDecoration(
gradient: RadialGradient(
center: Alignment.bottomCenter,
radius: 1.5,
colors: [
Color.fromARGB(255, 13, 35, 61),
Colors.black,
]
)
),
child: Metaballs(
effect: colorsAndEffects[colorEffectIndex].effect,
glowRadius: 1,
glowIntensity: 0.6,
maxBallRadius: 50,
minBallRadius: 20,
metaballs: 40,
color: Colors.grey,
gradient: LinearGradient(
colors: colorsAndEffects[colorEffectIndex].colors,
begin: Alignment.bottomRight,
end: Alignment.topLeft
),
child: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
crossAxisAlignment: CrossAxisAlignment.center,
children: [
Text(
'METABALLS',
style: TextStyle(
shadows: [
Shadow(
color: Colors.black.withOpacity(0.6),
blurRadius: 80
)
],
fontSize: 50 * width / 400,
fontWeight: FontWeight.w900
),
),
Text(
'DOUBLE TAP TO CHANGE EFFECT AND COLOR\nCURRENT EFFECT: ${colorsAndEffects[colorEffectIndex].name}',
style: TextStyle(
shadows: [
Shadow(
color: Colors.black.withOpacity(0.6),
blurRadius: 80
)
],
fontSize: 16 * width / 400,
fontWeight: FontWeight.w900
),
textAlign: TextAlign.center,
),
],
),
),
),
),
),
);
}
}