Wind Turbine Speed

main.dart

import 'package:flare_dart/math/mat2d.dart';
import 'package:flare_flutter/';
import 'package:flare_flutter/flare.dart';
import 'package:flare_flutter/flare_actor.dart';
import 'package:flare_flutter/flare_controller.dart';
import 'package:flutter/foundation.dart'
    show debugDefaultTargetPlatformOverride;
import 'package:flutter/material.dart';

void main() {
  debugDefaultTargetPlatformOverride = TargetPlatform.fuchsia;
  runApp(EolApp());
}

class EolApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: EolPage(),
    );
  }
}

class EolPage extends StatefulWidget {
  EolPage({Key key}) : super(key: key);

  @override
  _EolPageState createState() => _EolPageState();
}

class _EolPageState extends State<EolPage> implements FlareController {

  ActorAnimation _rotation;
  ActorNode _pales;
  FlutterActorArtboard _artboard;
  double _time = 0;
  double _speed = .5;

  @override
  bool advance(FlutterActorArtboard artboard, double elapsed) {
    _time += elapsed * _speed;
    _rotation.apply(_time % 4, artboard, 1);
    return true;
  }

  @override
  void initialize(FlutterActorArtboard artboard) {
    _pales = artboard.getNode("Pales");
    _rotation = artboard.getAnimation('rotation');
  }

  @override
  void setViewTransform(Mat2D viewTransform) {}

  void _speedUp() {
    setState(() {
      _speed += .4;
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Center(
        child: FlareActor("assets/eol.flr",
            fit: BoxFit.contain,
            alignment: Alignment.center,
            animation: 'rotation',
            controller: this),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: _speedUp,
        child: Icon(Icons.add),
      ),
    );
  }
}