Multiple ways to draw a ring of ticks

ticks_ring.dart

import 'dart:math';

import 'package:flutter/material.dart';

void main() => runApp(
      MaterialApp(
        theme: ThemeData.dark(),
        debugShowCheckedModeBanner: false,
        home: Playground(),
      ),
    );

class Playground extends StatefulWidget {
  @override
  _PlaygroundState createState() => _PlaygroundState();
}

class _PlaygroundState extends State<Playground> with TickerProviderStateMixin {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      backgroundColor: Color(0xFF1D232F),
      body: Center(
        child: CustomPaint(
          size: Size.fromRadius(400),
          painter: TickPainter(),
        ),
      ),
    );
  }
}

class TickPainter extends CustomPainter {
  static double deg2Rad(double degree) {
    return degree * pi / 180;
  }

  @override
  void paint(Canvas canvas, Size size) {
    final radius = size.shortestSide / 4;
    final center = size.center(Offset.zero);
    const tickCount = 60;
    const tickDelta = 360 / tickCount;
    const tickStrokeWidth = 4.0;
    const tickStrokeLength = 20.0;

    // 1
    for (var i = 0; i < tickCount; i++) {
      final angle = deg2Rad(i * tickDelta);
      final start = center + Offset.fromDirection(angle, radius);
      canvas.drawLine(
        start,
        start - Offset.fromDirection(angle, tickStrokeLength),
        Paint()
          ..color = Colors.red
          ..strokeWidth = tickStrokeWidth,
      );
    }

    // 2
    // final path = Path();
    // for (var i = 0; i < tickCount; i++) {
    //   final angle = deg2Rad(i * tickDelta);
    //   final start = center + Offset.fromDirection(angle, radius);
    //
    //   // A
    //   final end = start - Offset.fromDirection(angle, tickStrokeLength);
    //   path
    //     ..moveTo(start.dx, start.dy)
    //     ..lineTo(end.dx, end.dy);
    //
    //   // B
    //   // final end = Offset.fromDirection(angle, tickStrokeLength);
    //   // path
    //   //   ..moveTo(start.dx, start.dy)
    //   //   ..relativeLineTo(-end.dx, -end.dy);
    //
    // }
    //
    // canvas.drawPath(
    //   path,
    //   Paint()
    //     ..style = PaintingStyle.stroke
    //     ..color = Colors.red
    //     ..strokeWidth = tickStrokeWidth,
    // );
  }

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