颤振设计波二次贝塞尔曲线

时间:2019-08-20 07:36:15

标签: flutter

在此link中,我们解决了设计浪潮quadraticBezierTo,但这只是wavequadraticBezierTo浪潮的一半,我希望像此屏幕快照一样具有完整的设计:

enter image description here

现在我的问题是我们如何才能更改下面的代码以在其右侧进行另一半设计

这个下课使这个

enter image description here

class WaveClipperTwo extends CustomClipper<Path> {
  bool reverse;

  WaveClipperTwo({this.reverse = false});

  final int _coefficient = 16;
  double get _minStep => 1 / _coefficient;
  double get _preCenter => _minStep * (_coefficient / 2 - 1);
  double get _postCenter => _minStep * (_coefficient / 2 + 1);
  double get _preEnd => _minStep * (_coefficient - 2);

  @override
  Path getClip(Size size) {
    var path = Path();
    path.moveTo(0.0, 0.0);
    if(!reverse) {
      path.lineTo(0.0, size.height - 20.0);
      path.lineTo(size.width * _preCenter, size.height - 20.0);
      path.cubicTo(size.width/2, size.height - 20.0, size.width/2, size.height - 40.0, size.width * _postCenter, size.height - 40.0);
      path.lineTo(size.width * _preEnd, size.height - 40.0);
      path.quadraticBezierTo(size.width, size.height - 40.0, size.width, size.height - 20.0);
      path.lineTo(size.width, 0.0);
      path.close();
    }else{
      path.lineTo(0.0, 20);
      path.lineTo(size.width * _preCenter, 20.0);
      path.cubicTo(size.width/2, 20.0, size.width/2, 40.0, size.width * _postCenter, 40.0);
      path.lineTo(size.width * _preEnd, 40.0);
      path.quadraticBezierTo(size.width, 40, size.width, 20.0);
      path.lineTo(size.width, 0.0);
      path.close();
    }

    return path;
  }

  @override
  bool shouldReclip(CustomClipper<Path> oldClipper) => false;
}

1 个答案:

答案 0 :(得分:2)

您在这里:

TopicDescription

要使中间部分变宽或变窄时,请更改innerWidth常量。

npm uninstall --save reactstrap