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use vector

leam lisophara answered on April 17, 2023 Popularity 3/10 Helpfulness 1/10

answer use vector

use vector

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import 'package:flutter/material.dart';
import 'package:vector_math/vector_math_64.dart' as vector;

class HomeScreen extends StatefulWidget {
  HomeScreenState createState() => new HomeScreenState();
}

class HomeScreenState extends State<HomeScreen> with TickerProviderStateMixin {

  AnimationController _controller;

  @override initState() {
    _controller = new AnimationController(
      vsync: this, duration: const Duration(milliseconds: 300));
  }

  static Matrix4 originalTransformation = new Matrix4.compose(
    new vector.Vector3(1.0, 1.0, 1.0),
    new vector.Quaternion.euler(0.0, 0.0, 0.0),
    new vector.Vector3(1.0, 1.0, 1.0));

  static Matrix4 animatedTransformation = new Matrix4.compose(
    new vector.Vector3(5.0, 260.0, 1.0),
    new vector.Quaternion.euler(0.0, 1.0, -0.7),
    new vector.Vector3(0.6, 0.6, 0.6));


  Widget build(BuildContext context) {
    return new Scaffold(
      floatingActionButton: new FloatingActionButton(
        child: new Icon(Icons.play_arrow),
        onPressed: () => _controller.forward(from: 0.0),
      ),
      body: new Column(
        mainAxisSize: MainAxisSize.max,
        mainAxisAlignment: MainAxisAlignment.start,
        children: [
          new AnimatedBuilder(
            builder: (BuildContext context, Widget child) {
              return new Container(
                color: Colors.red,
                width: 100.0,
                height: 100.0,
                transform: new Matrix4Tween(
                  begin: originalTransformation,
                  end: animatedTransformation
                ).evaluate(_controller)
              );
            },
            animation: _controller,
          ),
        ],
      ),
    );
  }
}

class ExampleApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return new MaterialApp(
      theme: new ThemeData(
        primarySwatch: Colors.teal,
      ),
      home: new HomeScreen(),
      debugShowCheckedModeBanner: false,
    );
  }
}

void main() {
  runApp(new ExampleApp());
}

Popularity 3/10 Helpfulness 1/10 Language whatever

Source: stackoverflow.com

Tags: vector whatever

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Contributed on Apr 17 2023

leam lisophara

0 Answers Avg Quality 2/10

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