Creating a CustomClipPath with Straight Horizontal Lines in Flutter

Question:
I’m currently working on implementing a custom clip path in Flutter using CustomClipper<Path>, but I’m facing an issue where the horizontal lines in my shape aren’t rendering perfectly straight. Below is a detailed description of the problem and what I’ve tried so far:

Problem Description:

I have developed a CustomClipPath class to define a custom shape using Path commands such as moveTo and lineTo. The shape includes both horizontal and vertical lines that outline its form. However, upon rendering the shape, I’ve observed that the horizontal lines display slight diagonal segments instead of maintaining a straight path across the screen width.

What I Tried:

I structured the CustomClipPath class to specify the shape using various Path commands, adjusting coordinates within lineTo to position the shape’s vertices accurately.

What I Expected:

I anticipated that the CustomClipPath would render a shape with perfectly straight horizontal lines extending evenly across the screen width, adhering to the proportions defined within the Path.

What Actually Resulted:

Upon rendering, the horizontal lines within the shape exhibited minor diagonal deviations instead of remaining perfectly straight.

Image

img

Code Example:

import 'package:flutter/material.dart';

class CustomClipPath extends CustomClipper<Path> {
  @override
  Path getClip(Size size) {
    Path path = Path();

    path.moveTo(0, size.height * 0.30);
    path.lineTo(size.width * 0.10, size.height * 0.20);
    path.lineTo(0, size.height * 0.10);
    path.lineTo(size.width, 0);
    path.lineTo(size.width, size.height);
    path.lineTo(0, size.height);
    path.lineTo(size.width * 0.10, size.height * 0.90);
    path.lineTo(0, size.height * 0.80);
    path.lineTo(0, size.height);

    path.close();
    return path;
  }

  @override
  bool shouldReclip(covariant CustomClipper<Path> oldClipper) {
    return false;
  }
}

class ClipPathExample extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return ClipPath(
      clipper: CustomClipPath(),
      child: Container(
        width: MediaQuery.of(context).size.width,
        height: MediaQuery.of(context).size.height,
        color: Colors.blue, // Example background color
      ),
    );
  }
}

void main() {
  runApp(MaterialApp(
    home: Scaffold(
      appBar: AppBar(
        title: Text('Custom Clip Path Issue'),
      ),
      body: ClipPathExample(),
    ),
  ));
}

Actual Task:

I aim to achieve a clip path similar to a desired outcome, where horizontal lines are perfectly straight across the screen width.

Image

img

Additional Details:

• Device/Emulator: Flutter Desktop, Web, Mobile

Attempts Made:

I experimented with different coordinates and proportions within the CustomClipper<Path> class to align the horizontal lines accurately. Despite these adjustments, I have not been able to achieve the desired straight-line effect.

I’m seeking advice and insights on how to modify my CustomClipper<Path> implementation effectively to ensure the horizontal lines render perfectly straight as intended. Any guidance or suggestions would be greatly appreciated. Thank you for your assistance!