颤振变化波二次贝塞尔曲线到点 [英] Flutter change wave quadraticBezierTo points
本文介绍了颤振变化波二次贝塞尔曲线到点的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
使用下面的实现代码,我们可以进行以下自定义形状设计:
with this below implementation code we have this custom shape design:
在这个设计中,我想将其更改为:
and in this design i want to change that to:
当我刚刚学习创建自定义形状时,我做不到,有没有人可以帮助我实现这一目标?
as i just learn create custom shape i can't do that, is any body can help me how to achieve that?
谢谢
import 'package:flutter/material.dart';
class WaveClipperTwo extends CustomClipper<Path> {
bool reverse;
WaveClipperTwo({this.reverse = false});
@override
Path getClip(Size size) {
var path = Path();
if(!reverse) {
path.lineTo(0.0, size.height - 20);
var firstControlPoint = Offset(size.width / 4, size.height);
var firstEndPoint = Offset(size.width / 2.25, size.height - 30.0);
path.quadraticBezierTo(firstControlPoint.dx, firstControlPoint.dy,
firstEndPoint.dx, firstEndPoint.dy);
var secondControlPoint =
Offset(size.width - (size.width / 3.25), size.height - 65);
var secondEndPoint = Offset(size.width, size.height - 40);
path.quadraticBezierTo(secondControlPoint.dx, secondControlPoint.dy,
secondEndPoint.dx, secondEndPoint.dy);
path.lineTo(size.width, size.height - 40);
path.lineTo(size.width, 0.0);
path.close();
}else{
path.lineTo(0.0, 20);
var firstControlPoint = Offset(size.width / 4, 0.0);
var firstEndPoint = Offset(size.width / 2.25, 30.0);
path.quadraticBezierTo(firstControlPoint.dx, firstControlPoint.dy,
firstEndPoint.dx, firstEndPoint.dy);
var secondControlPoint =
Offset(size.width - (size.width / 3.25), 65);
var secondEndPoint = Offset(size.width, 40);
path.quadraticBezierTo(secondControlPoint.dx, secondControlPoint.dy,
secondEndPoint.dx, secondEndPoint.dy);
path.lineTo(size.width, size.height);
path.lineTo(0.0, size.height);
path.close();
}
return path;
}
@override
bool shouldReclip(CustomClipper<Path> oldClipper) => false;
}
推荐答案
我认为,您需要这样的东西:
I think, you need something like this:
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;
}
P.S.您可以尝试更改_coefficient
并选择适合您的情况
P.S. You can try to change _coefficient
and choose what suits for you
这篇关于颤振变化波二次贝塞尔曲线到点的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!
查看全文