flutter:使用Float64List Matrix4在CustomPaint中变换路径

import 'dart:typed_data';
import 'package:flutter/material.dart';

class MyCustomPainter extends CustomPainter {
  @override
  void paint(Canvas canvas, Size size) {
    Path path = Path();
    // 在路径中绘制一些形状

    // 创建一个变换矩阵
    Float64List matrix4Storage = Float64List(16);
    Matrix4 matrix4 = Matrix4.fromFloat64List(matrix4Storage);
    // 应用平移变换
    matrix4.translate(100, 100);
    // 应用缩放变换
    matrix4.scale(2.0, 2.0);
    // 应用旋转变换
    matrix4.rotateZ(45);

    // 将变换矩阵应用到路径上
    path = path.transform(matrix4.storage);

    // 绘制变换后的路径
    Paint paint = Paint();
    canvas.drawPath(path, paint);
  }

  @override
  bool shouldRepaint(CustomPainter oldDelegate) {
    return false;
  }
}

class MyWidget extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return CustomPaint(
      painter: MyCustomPainter(),
    );
  }
}