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flutter coordinate system

Jittery Jaguar answered on September 10, 2022 Popularity 6/10 Helpfulness 1/10

answer flutter coordinate system

flutter coordinate system

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class SinCanvas extends StatelessWidget {
  const SinCanvas({Key key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return Container(
      color: Colors.white,
      child: CustomPaint(
        size:Size(600,400),
        painter: SinPainter()
      ),
    );
  }
}

class SinPainter extends CustomPainter{
  @override void paint(Canvas canvas, Size size){
    final midY = size.height/2;
    final paint = Paint()..style = PaintingStyle.fill
    ..color = Colors.black;
    canvas.drawLine(Offset(0,midY), Offset(size.width,midY), paint);
    var pt = Offset(0,midY);
    for(double i=0;i<600;i+=0.1){
      final npt = Offset(i,midY-sin(i/50)*100);
      canvas.drawLine(pt, npt, paint);
      pt = npt;
    }
  }
  @override
  bool shouldRepaint(CustomPainter oldDelegate) => true;
}

Popularity 6/10 Helpfulness 1/10 Language dart

Source: stackoverflow.com

Tags: coordinate dart flutter system

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Contributed on Sep 10 2022

Jittery Jaguar

0 Answers Avg Quality 2/10

flutter coordinate system

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