Hey everybody I'm currently working on a custom sh...

# compose

[Dmitry Strekha]

Hey everybody
I'm currently working on a custom shape and have a question regarding smoothing the intersections of paths (using PathOperation.Difference)
🧵

[Dmitry Strekha]

Attachment #1 shows the desired result.
To achieve this, I've tried the following approach:
- create a superellips path
- create rounded rect path
- intersect them using PathOperation.Difference
and got the shape on attachment #2

As you can see, it closely resembles the desired shape, but the path smoothing at the intersection points is missing. How can I achieve this behavior? Any hints or suggestions would be greatly appreciated

[Alexander Zhirkevich]

quadraticBezierTo , cubicTo are usually used to make smooth curves

[Dmitry Strekha]

how can I find a intersection points of superellipse and rect? this functions take points, which coordinates are unknown

[Alexander Zhirkevich]

I mean it is nearly impossible to do it with primitive paths operations. You can easily make this shape from a combination of bezier curves without any ellipces or rects

[Dmitry Strekha]

thank you! I believe this is the way.
but the difficulty here is that it can be any shape, and position of the rect is dynamic
thank you anyway

[Alexander Zhirkevich]

Actually there is API for rounding path corners. It is called PathEffect.cornerPathEffect. It exists only for Paint so you have to use drawIntoCanvas . Not sure if this would help here but it definitely worth to try