Flutter第2天--Animation动画+粒子运动

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Flutter七日游第二天----2018-12-17----天气晴朗

零前言:

昨天讲了一下Flutter的基础项目,介绍了一下Dart语言,简单的用Canvas绘个图
本来打算今天把内置控件看一下的,不过既然昨天把图都画了,今天不玩动画岂不可惜
今天主要是把动画理一下,顺便把Android-java粒子运动复刻到Flutter-Dart里
最后会实现一个粒子时钟,Java版详见:Android原生绘图之炫酷倒计时
所以这篇会挺好玩的,瓜子,饮料,花生米备好,开始看吧

先挑几个图镇楼吧

时钟

运动盒粉碎球
星与芒星扩动

一、入门级动画:五角星的长大

五角星的长大.gif


1.照葫芦画瓢

按照昨天的Flutter初始项目,我们来自己写一个
本人是喜欢分包的,Javaer的优良习惯。至少逻辑清晰,分工明确,我创建了一个pager包
主页面内容用AnimaPage,虽然暂时还不知道StatefulWidget是什么,反正按照套路出牌就行了
仿照初始项目的套路写,这里绘图区自定义AnimaView,打算对五角星的外接圆半径R进行动画

import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:toly/view/anima_view.dart';

class AnimaPage extends StatefulWidget {
  @override
  _AnimaPageState createState() => _AnimaPageState();
}

class _AnimaPageState extends State<AnimaPage>{
  double _R = 25;//五角星的外接圆半径

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text("张风捷特烈"),
      ),
      body: CustomPaint(
        painter: AnimaView(context, _R),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: () {
        },
        tooltip: 'Increment',
        child: Icon(Icons.add),
      ),
    );
  }
}

2.AnimaView的实现:

n角星的路径第一天已经封装好了,不会的可以去看一下

import 'dart:ui';

import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:toly/helper/common_path.dart';
import 'package:toly/helper/help_view.dart';

class AnimaView extends CustomPainter {
  Paint mPaint;
  BuildContext context;
  double _R;

  AnimaView(this.context, double r) {
    mPaint = new Paint();
    mPaint.color = Colors.deepOrange;
    _R = r;
  }

  @override
  void paint(Canvas canvas, Size size) {
    var winSize = MediaQuery.of(context).size;
    drawGrid(canvas, winSize);
    drawCoo(canvas, new Size(160, 320), winSize);
    canvas.translate(160, 320);
    canvas.drawPath(nStarPath(5, _R, 50), mPaint);
  }
  @override
  bool shouldRepaint(CustomPainter oldDelegate) {
    return true;
  }
}

3.让数据动起来

现在万事俱备,只欠东风把R的值吹动就行了,下面有请Animation登场
vsync需要with SingleTickerProviderStateMixi
Tween:补间动画----这里即:在 25.0, ~ 150.0之间在2000ms之内均匀变化 (PS:由于程序运行情况不同,并非绝对均匀,但整体上是均匀的)
..:是级联运算,相当于再使用此对象,这里..也就代表animation.

class AnimaPage extends StatefulWidget {
  @override
  _AnimaPageState createState() => _AnimaPageState();
}

class _AnimaPageState extends State<AnimaPage>
    with SingleTickerProviderStateMixin {
  AnimationController controller;
  Animation<double> animation;
  double _R = 25;

  @override
  void initState() {
    super.initState();
    // 创建 AnimationController 对象
    //|----vsync时会防止屏幕外动画(动画的UI不在当前屏幕时)消耗不必要的资源 
    controller = AnimationController(
        duration: const Duration(milliseconds: 2000), vsync: this);
    animation = Tween(begin: 25.0, end: 150.0).animate(controller)
      ..addListener(() {
        setState(() {
          _R = animation.value;
        });
      });
  }

  @override
  void dispose() {
    super.dispose();
    controller.dispose(); // 资源释放
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text("张风捷特烈"),
      ),
      body: CustomPaint(
        painter: AnimaView(context, _R),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: () {
          controller.forward(); //执行动画
        },
        tooltip: 'Increment',
        child: Icon(Icons.add),
      ),
    );
  }
}

这样最简单的动画就动起来了


4.来理一理思路

把源码翻一翻,感觉整个动画体系也不是非常复杂
套路就是:Animatable用animate方法,把一个Animation包裹一下,形成一个更厉害的Animation
至于他们的n个儿子,也就是对数据的处理不同,产生的效果不同罢了,套路知道了,一切好办

动画.png


可以看出api并没有想象中的那么多,所以别怕

动画api.png


二、入门级动画:五角星的绽放

前面用了补间动画Tween,而且只动了一下,下面带来连续运动的不均匀动画

匀速往复动自定义曲线bounceInOut

1.往复运动
1.1:运动状态

你可以想象成一个人在一个范围数字跑道上跑步:

enum AnimationStatus {
  /// The animation is stopped at the beginning
  dismissed,//在正在开始时停止了
  /// The animation is running from beginning to end
  forward,//运动中
  /// The animation is running backwards, from end to beginning
  reverse,//跑到终点,再跑回来的时候
  /// The animation is stopped at the end
  completed,//跑到终点是
}

1.2:状态的监听

addStatusListener:可以监听当前运动状态:只要让它跑完了,再往回跑就行了

 animation = Tween(begin: 25.0, end: 150.0).animate(controller)
      ..addListener(() {
        setState(() {
          _R = animation.value;
        });
      })
      ..addStatusListener((status) {
        if (status == AnimationStatus.completed) {
          controller.reverse();
        } else if (status == AnimationStatus.dismissed) {
          controller.forward();
        }
      });

2.变速跑

就像运动员变速跑一样,感觉就像游戏里加buff,本来是匀速的Animation
给价格变速的buff就变速起来了,加buff的类就是Animatable,它的子类有一个CurveTween

animation = Tween(begin: 25.0, end: 150.0).animate(
        CurveTween(curve: Curves.bounceInOut).animate(controller))

就这么简单,Curves里有几个内置的变速器,给原来的animation装上就行了

bounceInOut.gif


3.自定义变速曲线
3.1:追踪一下源码
---->[CurveTween]---------控件只有一参Curve------------------------
class CurveTween extends Animatable<double> {
  /// Creates a curve tween.
  ///
  /// The [curve] argument must not be null.
  CurveTween({ @required this.curve })
    : assert(curve != null);

  /// The curve to use when transforming the value of the animation.
  Curve curve;
  
---->[Curve]--------抽象的,找儿子去--------------------
@immutable
abstract class Curve {

---->[Curve]--------四参构造的曲线,整合我意--------------------
class Cubic extends Curve {
  /// Creates a cubic curve.
  ///
  /// Rather than creating a new instance, consider using one of the common
  /// cubic curves in [Curves].
  ///
  /// The [a], [b], [c], and [d] arguments must not be null.
  const Cubic(this.a, this.b, this.c, this.d)


3.2:Chrome小工具

作为一名前端业余爱好者,Chrome里有个小东西很有用,
曲线生成,自带预览,简直无心插柳柳成荫。(记得掘金的头像可以转,有translate属性)

Cubic的获取.png

Cubic.gif


3.3:使用:
  animation = Tween(begin: 25.0, end: 150.0).animate(
        CurveTween(curve: Cubic(0.96, 0.13, 0.1, 1.2)).animate(controller))

自定义曲线.gif

Ok,基本上就这样,你get了吗?


三、初级动画:太阳的诞生

红太阳星与阳
1.红太阳:整型int 动画

套路学会了,这些动态改变一下n角星的尖角数,看看效果

1.1:AnimaPage里定义尖角数动画
Animation<int> numAnima;//n角星的尖角数动画
int _num = 5;//n角星的尖角数动画

 controller = AnimationController(
        duration: const Duration(milliseconds: 2000), vsync: this);

    numAnima = IntTween(begin: 5, end: 220).animate(controller)
      ..addListener(() {
        setState(() {
          _num = numAnima.value;//设置属性,刷新界面
        });
      })
      ..addStatusListener((status) {
        if (status == AnimationStatus.completed) {
          controller.reverse();
        } else if (status == AnimationStatus.dismissed) {
          controller.forward();
        }
      });

1.2:AnimaView增加入参
int _num;
AnimaView(this.context, {double R, int num, Color color}) {
    _num = num;
}
 
//绘制时使用_num即可
 canvas.drawPath(nStarPath(_num, 100, 50), mPaint);

2.星与阳:颜色动画

ColorTween相当于添加颜色改变的buff,入参的自己加吧,和上面一样,给画笔填色就行了

colorAnima =
        ColorTween(begin: Colors.yellow, end: Colors.red).animate(controller)
          ..addListener(() {
            setState(() {
              _color = colorAnima.value;
            });
          })
          ..addStatusListener((status) {
            if (status == AnimationStatus.completed) {
              controller.reverse();
            } else if (status == AnimationStatus.dismissed) {
              controller.forward();
            }
          });

3.其他效果

自己玩玩吧,随便改些属性

星与芒星扩动

星与芒:固定五角星内接圆半径,外接圆半径变大,角数变多,颜色变红
星扩动:五角星内接圆半径为外接圆一半,外接圆半径变大,角数变多,颜色变红

好了,预热完了,下面进入正题

四、粒子运动

无论什么语言只有能模拟时间流就可以有粒子动画
粒子动画的基础在Android原生绘图之让你了解View的运动里讲的很详细
思想对于所有语言都是通用的,不仅限于java,有兴趣的可以详细了解下

1.废话不多说,来个运动盒再说

运动盒就是小球在盒子里不断弹跳的动画,就像这样

1.1:新建文件:run_ball_view.dart----->RunBallView + Ball

先把小球的实体类写一下

class Ball {
  double aX; //加速度
  double aY; //加速度Y
  double vX; //速度X
  double vY; //速度Y
  double x; //点位X
  double y; //点位Y
  Color color; //颜色
  double r;//小球半径

  Ball({this.x, this.y, this.color, this.r, this.aX, this.aY, this.vX, this.vY});
}

1.2:画板准备好
class RunBallView extends CustomPainter {
  Paint mPaint;
  BuildContext context;
  Ball _ball;
  Rect _limit;

  RunBallView(this.context, Ball ball, Rect limit) {
    mPaint = new Paint();
    _ball = ball;
    _limit = limit;
  }

  @override
  void paint(Canvas canvas, Size size) {
    var winSize = MediaQuery.of(context).size;
    canvas.translate(160, 320);
    mPaint.color = Color.fromARGB(148, 198, 246, 248);
    canvas.drawRect(_limit, mPaint);

    canvas.save();
    drawBall(canvas, _ball);
    canvas.restore();
  }

  @override
  bool shouldRepaint(CustomPainter oldDelegate) {
    return true;
  }
 //绘制小球
  void drawBall(Canvas canvas, Ball ball) {
    mPaint.color = ball.color;
    canvas.drawCircle(Offset(ball.x, ball.y), ball.r, mPaint);
  }
}

1.3:认识一下矩形对象Rect

这是我们需要的字段

var limit = Rect.fromLTRB(-140, -100, 140, 100);

print("width:${limit.width}");
print("height:${limit.height}");
print("left:${limit.left}");
print("top:${limit.top}");
print("right:${limit.right}");
print("bottom:${limit.bottom}");

I/flutter (28755): width:280.0
I/flutter (28755): height:200.0
I/flutter (28755): left:-140.0
I/flutter (28755): top:-100.0
I/flutter (28755): right:140.0
I/flutter (28755): bottom:100.0

1.4:新建文件:run_ball_pager.dart---->RunBallPage

这里只需要一个时间流,用AnimationController一个人就够了

class RunBallPage extends StatefulWidget {
  @override
  _RunBallPageState createState() => _RunBallPageState();
}

class _RunBallPageState extends State<RunBallPage>
    with SingleTickerProviderStateMixin {
  AnimationController controller;
  Ball _ball;
  var _limit = Rect.fromLTRB(-140, -100, 140, 100);//矩形边界
    
  @override
  void initState() {
    super.initState();
    //初始化小球
    _ball = Ball(x: 0, y: 0, color: Colors.blue, r: 10, aX: 0, aY: 0, vX: 0, vY: 2);

    // 创建 AnimationController 对象
    //|----vsync时会防止屏幕外动画(动画的UI不在当前屏幕时)消耗不必要的资源
    controller = AnimationController(
        duration: const Duration(milliseconds: 200000), vsync: this);

    controller.addListener(() {
      updateBall();//更新小球

      setState(() {});
    });

    controller.addStatusListener((status) {
      if (status == AnimationStatus.completed) {
        controller.reverse();
      } else if (status == AnimationStatus.dismissed) {
        controller.forward();
      }
    });
  }

  @override
  void dispose() {
    super.dispose();
    controller.dispose(); // 资源释放
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text("张风捷特烈"),
      ),
      body: CustomPaint(
        painter: RunBallView(context, _ball,_limit),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: () {
          controller.forward(); //执行动画
        },
        tooltip: 'Increment',
        child: Icon(Icons.add),
      ),
    );
  }

//更新小球
  void updateBall() {}
}

小球.png

这样静态小球就完成了


1.5:更新新小球位置,渲染视图:RunBallPage#updateBall

上下弹动.gif

//更新小球位置
  void updateBall() {
    //运动学公式
    _ball.x += _ball.vX;
    _ball.y += _ball.vY;
    _ball.vX += _ball.aX;
    _ball.vY += _ball.aY;
    //限定下边界
    if (_ball.y > _limit.bottom - _ball.r) {
      _ball.y = _limit.bottom - _ball.r;
      _ball.vY = -_ball.vY;
      _ball.color=randomRGB();//碰撞后随机色
    }
    //限定上边界
    if (_ball.y < _limit.top + _ball.r) {
      _ball.y = _limit.top + _ball.r;
      _ball.vY = -_ball.vY;
      _ball.color=randomRGB();//碰撞后随机色
    }
  }

1.6:运动盒的实现

运动盒.gif

//初始时附加信息
_ball = Ball(x: 0, y: 0, color: Colors.blue, r: 10, aX: 0, aY: 0.1, vX: 2, vY: -2);

//更新小球位置
  void updateBall() {
    //运动学公式
    _ball.x += _ball.vX;
    _ball.y += _ball.vY;
    _ball.vX += _ball.aX;
    _ball.vY += _ball.aY;
    //限定下边界
    if (_ball.y > _limit.bottom - _ball.r) {
      _ball.y = _limit.bottom - _ball.r;
      _ball.vY = -_ball.vY;
      _ball.color=randomRGB();//碰撞后随机色
    }
    //限定上边界
    if (_ball.y < _limit.top + _ball.r) {
      _ball.y = _limit.top + _ball.r;
      _ball.vY = -_ball.vY;
      _ball.color=randomRGB();//碰撞后随机色
    }

    //限定左边界
    if (_ball.x < _limit.left + _ball.r) {
      _ball.x = _limit.left + _ball.r;
      _ball.vX = -_ball.vX;
      _ball.color=randomRGB();//碰撞后随机色
    }

    //限定右边界
    if (_ball.x > _limit.right - _ball.r) {
      _ball.x = _limit.right - _ball.r;
      _ball.vX= -_ball.vX;
      _ball.color=randomRGB();//碰撞后随机色
    }
  }

2.粒子的运动

思路就是:用List把球装一下,碰撞的时候,创建一个方向相反,半径减半的球,加入集合
并将当前的球半径减半,效果挺不错的,实现起来也不麻烦。Android-java版可见


2.1:改动:RunBallPage

半径小于0.3就移除,为了不让小球无限增加,小于0.3基本上也就卡不见了
当然你也可以自定义移除的时机

var _balls = List<Ball>();//将_ball换成集合

var ball = Ball(x: 0, y: 0, color: Colors.blue, r: 40, aX: 0.05, aY: 0.1, vX: 3, vY: -3);
_balls.add(ball);//添加一个

//更新方法
for (int i = 0; i < _balls.length; i++) {
      var ball = _balls[i];
      if (ball.r < 0.3) {
        //半径小于0.3就移除
        _balls.removeAt(i);
      }
      //运动学公式
      ball.x += ball.vX;
      ball.y += ball.vY;
      ball.vX += ball.aX;
      ball.vY += ball.aY;
      //限定下边界
      if (ball.y > _limit.bottom) {
        var newBall = Ball.fromBall(ball);
        newBall.r = newBall.r / 2;
        newBall.vX = -newBall.vX;
        newBall.vY = -newBall.vY;
        _balls.add(newBall);
        ball.r = ball.r / 2;

        ball.y = _limit.bottom;
        ball.vY = -ball.vY;
        ball.color = randomRGB(); //碰撞后随机色
      }
      //限定上边界
      if (ball.y < _limit.top) {
        ball.y = _limit.top;
        ball.vY = -ball.vY;
        ball.color = randomRGB(); //碰撞后随机色
      }

      //限定左边界
      if (ball.x < _limit.left) {
        ball.x = _limit.left;
        ball.vX = -ball.vX;
        ball.color = randomRGB(); //碰撞后随机色
      }

      //限定右边界
      if (ball.x > _limit.right) {
        var newBall = Ball.fromBall(ball);
        newBall.r = newBall.r / 2;
        newBall.vX = -newBall.vX;
        newBall.vY = -newBall.vY;
        _balls.add(newBall);
        ball.r = ball.r / 2;

        ball.x = _limit.right;
        ball.vX = -ball.vX;
        ball.color = randomRGB(); //碰撞后随机色
      }
    }
  }
  
//传入画布也变成小球集合
body: CustomPaint(
        painter: RunBallView(context, _balls, _limit),
),

2.2:绘制小球时:RunBallView

把小球都绘制出来就行了

//复制一个小球
Ball.fromBall(Ball ball) {
  this.x = ball.x;
  this.y = ball.y;
  this.color = ball.color;
  this.r = ball.r;
  this.aX = ball.aX;
  this.aY = ball.aY;
  this.vX = ball.vX;
  this.vY = ball.vY;
}

//------paint方法中-----------
_balls.forEach((ball) {
     drawBall(canvas, ball);
   });

这样就完成了,是不是没有想象中的那么复杂


五、粒子时钟

这里就不详细分析,这里的Java版已经分析的很细致了,直接上代码(基本上是Java的翻译版)
这个效果新建了一个页面来做,digit三维数组Dart版附在文尾

1.渲染数字

绘制1994.png

/**
 * 渲染数字
 * @param num    要显示的数字
 * @param canvas 画布
 */
void renderDigit(int num, Canvas canvas) {
  if (num > 10) {
    return;
  }
  for (int i = 0; i < digit[num].length; i++) {
    for (int j = 0; j < digit[num][j].length; j++) {
      if (digit[num][i][j] == 1) {
        canvas.save();
        double rX = j * 2 * (_radius + 1) + (_radius + 1); //第(i,j)个点圆心横坐标
        double rY = i * 2 * (_radius + 1) + (_radius + 1); //第(i,j)个点圆心纵坐标
        canvas.translate(rX, rY);
        mPaint.color = Colors.blue;
        canvas.drawPath(mStarPath, mPaint);
        canvas.restore();
      }
    }
  }
}

2.画布中绘制1994
canvas.save();
renderDigit(1, canvas);
canvas.translate(80, 0);
renderDigit(9, canvas);
canvas.translate(80, 0);
renderDigit(9, canvas);
canvas.translate(80, 0);
renderDigit(4, canvas);
canvas.restore();

3.绘制时间

绘制时间.png

3.1:时间的简单获取
DateTime now = new DateTime.now();
var hour = now.hour;
var second = now.second;
var minute = now.minute;

print("hour$hour");//15
print("second$second");//57
print("minute$minute");//27

3.2:绘制时间
//时
renderDigit(_now.hour ~/ 10, canvas);
canvas.translate(19 * _radius, 0);
renderDigit(_now.hour % 10, canvas);
//:
canvas.translate(19 * _radius, 0);
renderDigit(10, canvas);
//分
canvas.translate(11 * _radius, 0);
renderDigit(_now.minute ~/ 10, canvas);
canvas.translate(19 * _radius, 0);
renderDigit(_now.minute % 10, canvas);
//:
canvas.translate(18 * _radius, 0);
renderDigit(10, canvas);
//秒
canvas.translate(11 * _radius, 0);
renderDigit(_now.second ~/ 10, canvas);
canvas.translate(19 * _radius, 0);
renderDigit(_now.second % 10, canvas);

3.3:用Animation动起来

运动时钟.gif


4.加小球

方法基本上是Java版改些的,这里不分析了,可以看Java版的分析,基本上一致

时钟

//在类的外部定义全局的变量
var currTime = new DateTime.now();
var tagOfBall = new DateTime.now().millisecondsSinceEpoch;
var _balls = new List<Ball>();

//构造方法中刷新小球
  ClockView(this.context) {
    mPaint = new Paint();
    mStarPath = nStarPath(5, _radius, _radius / 2);
    _now = new DateTime.now();
    addBallsChanged();
    updateBalls();
  }


  /**
   * 添加倒计时中改动的点---变动加球
   */
  void addBallsChanged() {
    var now = new DateTime.now();
    if (currTime.second != now.second) {
      //判断当前时间是否改变,再将点位放到集合中
      if ((currTime.hour ~/ 10) != (now.hour ~/ 10)) {
        addBalls((-17 * 5 - 11 * 2) * _radius.toInt(), currTime.hour ~/ 10);
      }
      if ((currTime.hour % 10) != (now.hour % 10)) {
        addBalls((-17 * 4 - 11 * 2) * _radius.toInt(), currTime.hour % 10);
      }
      if ((currTime.minute ~/ 10) != (now.minute ~/ 10)) {
        addBalls((-18 * 3 - 11) * _radius.toInt(), currTime.minute ~/ 10);
      }
      if ((currTime.minute % 10) != (now.minute % 10)) {
        addBalls((-18 * 2 - 11) * _radius.toInt(), currTime.minute % 10);
      }
      if ((currTime.second ~/ 10) != (now.second ~/ 10)) {
        addBalls(-18 * _radius.toInt(), currTime.second ~/ 10);
      }
      if ((currTime.second % 10) != (now.second % 10)) {
        addBalls(0, currTime.second % 10);
        currTime = now;
      }
    }
  }

  //添加小球
  addBalls(int offsetX, int num) {
    Random random = new Random();
    for (int i = 0; i < digit[num].length; i++) {
      for (int j = 0; j < digit[num][i].length; j++) {
        if (digit[num][i][j] == 1) {
          Ball ball = new Ball();
          ball.aY = 0.1;
          ball.vX = pow(-1, random.nextInt(1000)) * 6 * random.nextDouble();
          ball.vY = 4 * random.nextDouble();
          ball.x =
              offsetX + j * 2 * (_radius + 1) + (_radius + 1); //第(i,j)个点圆心横坐标
          ball.y = i * 2 * (_radius + 1) + (_radius + 1); //第(i,j)个点圆心纵坐标
          ball.color = randomRGB();
          ball.r = _radius;
          _balls.add(ball);
        }
      }
    }
  }

  /**
   * 更新所有球的位置---让球运动
   * 并且越界移除
   */
  void updateBalls() {
    double maxX = 400; //限定x范围大值

    for (Ball ball in _balls) {
      ball.x += ball.vX; //x=xo+v*t-----t=1
      ball.y += ball.vY;
      ball.y += ball.aY; //v=vo+a*t-----t=1

      if (ball.y >= 160) {
        //超过Y底线,反弹
        ball.y = 160;
        ball.vY = -ball.vY * 0.99;
      }

      if (ball.x > maxX) {
        //超过X最大值,反弹
        ball.x = maxX;
        ball.vX = -ball.vX * 0.99;
      }
    }

    //5秒清一次屏
    if (new DateTime.now().millisecondsSinceEpoch - tagOfBall > 5000) {
      _balls.clear();
      tagOfBall = new DateTime.now().millisecondsSinceEpoch;
    }
  }

好了,今天就这样,内容有点多,现在Dart的语法越用越熟练了


后记:捷文规范

1.本文成长记录及勘误表
项目源码日期备注
V0.1-github2018-12-17Flutter第2天--Animation动画+粒子运动
2.更多关于我
笔名QQ微信爱好
张风捷特烈1981462002zdl1994328语言
我的github我的简书我的掘金个人网站
3.声明

1----本文由张风捷特烈原创,转载请注明
2----欢迎广大编程爱好者共同交流
3----个人能力有限,如有不正之处欢迎大家批评指证,必定虚心改正
4----看到这里,我在此感谢你的喜欢与支持


icon_wx_200.png


//颜色常量
import 'dart:ui';

const colors = [
  Color(0x8833B5E5),
  Color(0x880099CC),
  Color(0x889933CC),
  Color(0x8899CC00),
  Color(0x88669900),
  Color(0x88FFBB33),
  Color(0x88FF8800),
  Color(0x88FF4444),
  Color(0x88CC0000)
];

const digit = [
  [
    [0, 0, 1, 1, 1, 0, 0],
    [0, 1, 1, 0, 1, 1, 0],
    [1, 1, 0, 0, 0, 1, 1],
    [1, 1, 0, 0, 0, 1, 1],
    [1, 1, 0, 0, 0, 1, 1],
    [1, 1, 0, 0, 0, 1, 1],
    [1, 1, 0, 0, 0, 1, 1],
    [1, 1, 0, 0, 0, 1, 1],
    [0, 1, 1, 0, 1, 1, 0],
    [0, 0, 1, 1, 1, 0, 0]
  ], //0

  [
    [0, 0, 0, 1, 1, 0, 0],
    [0, 1, 1, 1, 1, 0, 0],
    [0, 0, 0, 1, 1, 0, 0],
    [0, 0, 0, 1, 1, 0, 0],
    [0, 0, 0, 1, 1, 0, 0],
    [0, 0, 0, 1, 1, 0, 0],
    [0, 0, 0, 1, 1, 0, 0],
    [0, 0, 0, 1, 1, 0, 0],
    [0, 0, 0, 1, 1, 0, 0],
    [1, 1, 1, 1, 1, 1, 1]
  ], //1
  [
    [0, 1, 1, 1, 1, 1, 0],
    [1, 1, 0, 0, 0, 1, 1],
    [0, 0, 0, 0, 0, 1, 1],
    [0, 0, 0, 0, 1, 1, 0],
    [0, 0, 0, 1, 1, 0, 0],
    [0, 0, 1, 1, 0, 0, 0],
    [0, 1, 1, 0, 0, 0, 0],
    [1, 1, 0, 0, 0, 0, 0],
    [1, 1, 0, 0, 0, 1, 1],
    [1, 1, 1, 1, 1, 1, 1]
  ], //2
  [
    [1, 1, 1, 1, 1, 1, 1],
    [0, 0, 0, 0, 0, 1, 1],
    [0, 0, 0, 0, 1, 1, 0],
    [0, 0, 0, 1, 1, 0, 0],
    [0, 0, 1, 1, 1, 0, 0],
    [0, 0, 0, 0, 1, 1, 0],
    [0, 0, 0, 0, 0, 1, 1],
    [0, 0, 0, 0, 0, 1, 1],
    [1, 1, 0, 0, 0, 1, 1],
    [0, 1, 1, 1, 1, 1, 0]
  ], //3

  [
    [0, 0, 0, 0, 1, 1, 0],
    [0, 0, 0, 1, 1, 1, 0],
    [0, 0, 1, 1, 1, 1, 0],
    [0, 1, 1, 0, 1, 1, 0],
    [1, 1, 0, 0, 1, 1, 0],
    [1, 1, 1, 1, 1, 1, 1],
    [0, 0, 0, 0, 1, 1, 0],
    [0, 0, 0, 0, 1, 1, 0],
    [0, 0, 0, 0, 1, 1, 0],
    [0, 0, 0, 1, 1, 1, 1]
  ], //4
  [
    [1, 1, 1, 1, 1, 1, 1],
    [1, 1, 0, 0, 0, 0, 0],
    [1, 1, 0, 0, 0, 0, 0],
    [1, 1, 1, 1, 1, 1, 0],
    [0, 0, 0, 0, 0, 1, 1],
    [0, 0, 0, 0, 0, 1, 1],
    [0, 0, 0, 0, 0, 1, 1],
    [0, 0, 0, 0, 0, 1, 1],
    [1, 1, 0, 0, 0, 1, 1],
    [0, 1, 1, 1, 1, 1, 0]
  ], //5
  [
    [0, 0, 0, 0, 1, 1, 0],
    [0, 0, 1, 1, 0, 0, 0],
    [0, 1, 1, 0, 0, 0, 0],
    [1, 1, 0, 0, 0, 0, 0],
    [1, 1, 0, 1, 1, 1, 0],
    [1, 1, 0, 0, 0, 1, 1],
    [1, 1, 0, 0, 0, 1, 1],
    [1, 1, 0, 0, 0, 1, 1],
    [1, 1, 0, 0, 0, 1, 1],
    [0, 1, 1, 1, 1, 1, 0]
  ], //6
  [
    [1, 1, 1, 1, 1, 1, 1],
    [1, 1, 0, 0, 0, 1, 1],
    [0, 0, 0, 0, 1, 1, 0],
    [0, 0, 0, 0, 1, 1, 0],
    [0, 0, 0, 1, 1, 0, 0],
    [0, 0, 0, 1, 1, 0, 0],
    [0, 0, 1, 1, 0, 0, 0],
    [0, 0, 1, 1, 0, 0, 0],
    [0, 0, 1, 1, 0, 0, 0],
    [0, 0, 1, 1, 0, 0, 0]
  ], //7
  [
    [0, 1, 1, 1, 1, 1, 0],
    [1, 1, 0, 0, 0, 1, 1],
    [1, 1, 0, 0, 0, 1, 1],
    [1, 1, 0, 0, 0, 1, 1],
    [0, 1, 1, 1, 1, 1, 0],
    [1, 1, 0, 0, 0, 1, 1],
    [1, 1, 0, 0, 0, 1, 1],
    [1, 1, 0, 0, 0, 1, 1],
    [1, 1, 0, 0, 0, 1, 1],
    [0, 1, 1, 1, 1, 1, 0]
  ], //8
  [
    [0, 1, 1, 1, 1, 1, 0],
    [1, 1, 0, 0, 0, 1, 1],
    [1, 1, 0, 0, 0, 1, 1],
    [1, 1, 0, 0, 0, 1, 1],
    [0, 1, 1, 1, 0, 1, 1],
    [0, 0, 0, 0, 0, 1, 1],
    [0, 0, 0, 0, 0, 1, 1],
    [0, 0, 0, 0, 1, 1, 0],
    [0, 0, 0, 1, 1, 0, 0],
    [0, 1, 1, 0, 0, 0, 0]
  ], //9
  [
    [0, 0, 0, 0],
    [0, 0, 0, 0],
    [0, 1, 1, 0],
    [0, 1, 1, 0],
    [0, 0, 0, 0],
    [0, 0, 0, 0],
    [0, 1, 1, 0],
    [0, 1, 1, 0],
    [0, 0, 0, 0],
    [0, 0, 0, 0]
  ] //:
];